diff --git a/Cargo.lock b/Cargo.lock
index 1bcdb7c2..438bfdb8 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -18,7 +18,16 @@ version = "0.14.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a55f82cfe485775d02112886f4169bde0c5894d75e79ead7eafe7e40a25e45f7"
 dependencies = [
- "gimli",
+ "gimli 0.23.0",
+]
+
+[[package]]
+name = "addr2line"
+version = "0.15.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e7a2e47a1fbe209ee101dd6d61285226744c6c8d3c21c8dc878ba6cb9f467f3a"
+dependencies = [
+ "gimli 0.24.0",
 ]
 
 [[package]]
@@ -89,9 +98,9 @@ checksum = "739f4a8db6605981345c5654f3a85b056ce52f37a39d34da03f25bf2151ea16e"
 
 [[package]]
 name = "aho-corasick"
-version = "0.7.15"
+version = "0.7.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7404febffaa47dac81aa44dba71523c9d069b1bdc50a77db41195149e17f68e5"
+checksum = "1e37cfd5e7657ada45f742d6e99ca5788580b5c529dc78faf11ece6dc702656f"
 dependencies = [
  "memchr",
 ]
@@ -116,15 +125,24 @@ dependencies = [
 
 [[package]]
 name = "anyhow"
-version = "1.0.40"
+version = "1.0.41"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "28b2cd92db5cbd74e8e5028f7e27dd7aa3090e89e4f2a197cc7c8dfb69c7063b"
+checksum = "15af2628f6890fe2609a3b91bef4c83450512802e59489f9c1cb1fa5df064a61"
 
 [[package]]
 name = "approx"
-version = "0.3.2"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f0e60b75072ecd4168020818c0107f2857bb6c4e64252d8d3983f6263b40a5c3"
+checksum = "3f2a05fd1bd10b2527e20a2cd32d8873d115b8b39fe219ee25f42a8aca6ba278"
+dependencies = [
+ "num-traits",
+]
+
+[[package]]
+name = "approx"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "072df7202e63b127ab55acfe16ce97013d5b97bf160489336d3f1840fd78e99e"
 dependencies = [
  "num-traits",
 ]
@@ -157,6 +175,12 @@ version = "0.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "23b62fc65de8e4e7f52534fb52b0f3ed04746ae267519eef2a83941e8085068b"
 
+[[package]]
+name = "arrayvec"
+version = "0.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "be4dc07131ffa69b8072d35f5007352af944213cde02545e2103680baed38fcd"
+
 [[package]]
 name = "asn1_der"
 version = "0.6.3"
@@ -189,16 +213,16 @@ dependencies = [
 
 [[package]]
 name = "async-executor"
-version = "1.4.0"
+version = "1.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "eb877970c7b440ead138f6321a3b5395d6061183af779340b65e20c0fede9146"
+checksum = "871f9bb5e0a22eeb7e8cf16641feb87c9dc67032ccf8ff49e772eb9941d3a965"
 dependencies = [
  "async-task",
  "concurrent-queue",
  "fastrand",
  "futures-lite",
  "once_cell",
- "vec-arena",
+ "slab",
 ]
 
 [[package]]
@@ -219,29 +243,29 @@ dependencies = [
 
 [[package]]
 name = "async-io"
-version = "1.3.1"
+version = "1.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9315f8f07556761c3e48fec2e6b276004acf426e6dc068b2c2251854d65ee0fd"
+checksum = "4bbfd5cf2794b1e908ea8457e6c45f8f8f1f6ec5f74617bf4662623f47503c3b"
 dependencies = [
  "concurrent-queue",
  "fastrand",
  "futures-lite",
  "libc",
  "log",
- "nb-connect",
  "once_cell",
  "parking",
  "polling",
- "vec-arena",
+ "slab",
+ "socket2 0.4.0",
  "waker-fn",
  "winapi 0.3.9",
 ]
 
 [[package]]
 name = "async-lock"
-version = "2.3.0"
+version = "2.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1996609732bde4a9988bc42125f55f2af5f3c36370e27c778d5191a4a1b63bfb"
+checksum = "e6a8ea61bf9947a1007c5cada31e647dbc77b103c679858150003ba697ea798b"
 dependencies = [
  "event-listener",
 ]
@@ -257,15 +281,16 @@ dependencies = [
 
 [[package]]
 name = "async-process"
-version = "1.0.2"
+version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ef37b86e2fa961bae5a4d212708ea0154f904ce31d1a4a7f47e1bbc33a0c040b"
+checksum = "a8f38756dd9ac84671c428afbf7c9f7495feff9ec5b0710f17100098e5b354ac"
 dependencies = [
  "async-io",
  "blocking",
  "cfg-if 1.0.0",
  "event-listener",
  "futures-lite",
+ "libc",
  "once_cell",
  "signal-hook",
  "winapi 0.3.9",
@@ -282,7 +307,7 @@ dependencies = [
  "async-io",
  "async-lock",
  "async-process",
- "crossbeam-utils 0.8.3",
+ "crossbeam-utils 0.8.5",
  "futures-channel",
  "futures-core",
  "futures-io",
@@ -307,9 +332,9 @@ checksum = "e91831deabf0d6d7ec49552e489aed63b7456a7a3c46cff62adad428110b0af0"
 
 [[package]]
 name = "async-trait"
-version = "0.1.48"
+version = "0.1.50"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "36ea56748e10732c49404c153638a15ec3d6211ec5ff35d9bb20e13b93576adf"
+checksum = "0b98e84bbb4cbcdd97da190ba0c58a1bb0de2c1fdf67d159e192ed766aeca722"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -376,15 +401,16 @@ checksum = "cdb031dd78e28731d87d56cc8ffef4a8f36ca26c38fe2de700543e627f8a464a"
 
 [[package]]
 name = "backtrace"
-version = "0.3.56"
+version = "0.3.60"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9d117600f438b1707d4e4ae15d3595657288f8235a0eb593e80ecc98ab34e1bc"
+checksum = "b7815ea54e4d821e791162e078acbebfd6d8c8939cd559c9335dceb1c8ca7282"
 dependencies = [
- "addr2line",
+ "addr2line 0.15.2",
+ "cc",
  "cfg-if 1.0.0",
  "libc",
  "miniz_oxide",
- "object 0.23.0",
+ "object 0.25.3",
  "rustc-demangle",
 ]
 
@@ -414,36 +440,30 @@ checksum = "904dfeac50f3cdaba28fc6f57fdcddb75f49ed61346676a78c4ffe55877802fd"
 
 [[package]]
 name = "bincode"
-version = "1.3.2"
+version = "1.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d175dfa69e619905c4c3cdb7c3c203fa3bdd5d51184e3afdb2742c0280493772"
+checksum = "b1f45e9417d87227c7a56d22e471c6206462cba514c7590c09aff4cf6d1ddcad"
 dependencies = [
- "byteorder",
  "serde",
 ]
 
 [[package]]
 name = "bindgen"
-version = "0.54.0"
+version = "0.57.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "66c0bb6167449588ff70803f4127f0684f9063097eca5016f37eb52b92c2cf36"
+checksum = "fd4865004a46a0aafb2a0a5eb19d3c9fc46ee5f063a6cfc605c69ac9ecf5263d"
 dependencies = [
  "bitflags",
  "cexpr",
- "cfg-if 0.1.10",
  "clang-sys",
- "clap",
- "env_logger",
  "lazy_static",
  "lazycell",
- "log",
  "peeking_take_while",
  "proc-macro2",
  "quote",
  "regex",
  "rustc-hash",
  "shlex",
- "which 3.1.1",
 ]
 
 [[package]]
@@ -454,12 +474,22 @@ checksum = "cf1de2fe8c75bc145a2f577add951f8134889b4795d47466a54a5c846d691693"
 
 [[package]]
 name = "bitvec"
-version = "0.20.2"
+version = "0.17.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1f682656975d3a682daff957be4ddeb65d6ad656737cd821f2d00685ae466af1"
+checksum = "41262f11d771fd4a61aa3ce019fca363b4b6c282fca9da2a31186d3965a47a5c"
+dependencies = [
+ "either",
+ "radium 0.3.0",
+]
+
+[[package]]
+name = "bitvec"
+version = "0.20.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7774144344a4faa177370406a7ff5f1da24303817368584c6206c8303eb07848"
 dependencies = [
  "funty",
- "radium",
+ "radium 0.6.2",
  "tap",
  "wyz",
 ]
@@ -509,9 +539,9 @@ dependencies = [
 
 [[package]]
 name = "blake3"
-version = "0.3.7"
+version = "0.3.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e9ff35b701f3914bdb8fad3368d822c766ef2858b2583198e41639b936f09d3f"
+checksum = "b64485778c4f16a6a5a9d335e80d449ac6c70cdd6a06d2af18a6f6f775a125b3"
 dependencies = [
  "arrayref",
  "arrayvec 0.5.2",
@@ -590,9 +620,9 @@ checksum = "771fe0050b883fcc3ea2359b1a96bcfbc090b7116eae7c3c512c7a083fdf23d3"
 
 [[package]]
 name = "bstr"
-version = "0.2.15"
+version = "0.2.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a40b47ad93e1a5404e6c18dec46b628214fee441c70f4ab5d6942142cc268a3d"
+checksum = "90682c8d613ad3373e66de8c6411e0ae2ab2571e879d2efbf73558cc66f21279"
 dependencies = [
  "memchr",
 ]
@@ -608,9 +638,15 @@ dependencies = [
 
 [[package]]
 name = "bumpalo"
-version = "3.6.1"
+version = "3.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9c59e7af012c713f529e7a3ee57ce9b31ddd858d4b512923602f74608b009631"
+
+[[package]]
+name = "byte-slice-cast"
+version = "0.3.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "63396b8a4b9de3f4fdfb320ab6080762242f66a8ef174c49d8e19b674db4cdbe"
+checksum = "b0a5e3906bcbf133e33c1d4d95afc664ad37fbdb9f6568d8043e7ea8c27d93d3"
 
 [[package]]
 name = "byte-slice-cast"
@@ -626,9 +662,9 @@ checksum = "e3b5ca7a04898ad4bcd41c90c5285445ff5b791899bb1b0abdd2a2aa791211d7"
 
 [[package]]
 name = "byteorder"
-version = "1.3.4"
+version = "1.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "08c48aae112d48ed9f069b33538ea9e3e90aa263cfa3d1c24309612b1f7472de"
+checksum = "14c189c53d098945499cdfa7ecc63567cf3886b3332b312a5b4585d8d3a6a610"
 
 [[package]]
 name = "bytes"
@@ -683,9 +719,9 @@ dependencies = [
 
 [[package]]
 name = "cc"
-version = "1.0.67"
+version = "1.0.68"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e3c69b077ad434294d3ce9f1f6143a2a4b89a8a2d54ef813d85003a4fd1137fd"
+checksum = "4a72c244c1ff497a746a7e1fb3d14bd08420ecda70c8f25c7112f2781652d787"
 dependencies = [
  "jobserver",
 ]
@@ -769,13 +805,13 @@ dependencies = [
 
 [[package]]
 name = "clang-sys"
-version = "0.29.3"
+version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fe6837df1d5cba2397b835c8530f51723267e16abbf83892e9e5af4f0e5dd10a"
+checksum = "853eda514c284c2287f4bf20ae614f8781f40a81d32ecda6e91449304dfe077c"
 dependencies = [
  "glob",
  "libc",
- "libloading",
+ "libloading 0.7.0",
 ]
 
 [[package]]
@@ -850,10 +886,13 @@ dependencies = [
 ]
 
 [[package]]
-name = "cpuid-bool"
-version = "0.1.2"
+name = "cpufeatures"
+version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8aebca1129a03dc6dc2b127edd729435bbc4a37e1d5f4d7513165089ceb02634"
+checksum = "ed00c67cb5d0a7d64a44f6ad2668db7e7530311dd53ea79bcd4fb022c64911c8"
+dependencies = [
+ "libc",
+]
 
 [[package]]
 name = "cpuid-bool"
@@ -881,7 +920,7 @@ dependencies = [
  "cranelift-codegen-meta",
  "cranelift-codegen-shared",
  "cranelift-entity",
- "gimli",
+ "gimli 0.23.0",
  "log",
  "regalloc",
  "serde",
@@ -966,12 +1005,12 @@ dependencies = [
 
 [[package]]
 name = "crossbeam-channel"
-version = "0.5.0"
+version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dca26ee1f8d361640700bde38b2c37d8c22b3ce2d360e1fc1c74ea4b0aa7d775"
+checksum = "06ed27e177f16d65f0f0c22a213e17c696ace5dd64b14258b52f9417ccb52db4"
 dependencies = [
  "cfg-if 1.0.0",
- "crossbeam-utils 0.8.3",
+ "crossbeam-utils 0.8.5",
 ]
 
 [[package]]
@@ -992,8 +1031,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "94af6efb46fef72616855b036a624cf27ba656ffc9be1b9a3c931cfc7749a9a9"
 dependencies = [
  "cfg-if 1.0.0",
- "crossbeam-epoch 0.9.3",
- "crossbeam-utils 0.8.3",
+ "crossbeam-epoch 0.9.5",
+ "crossbeam-utils 0.8.5",
 ]
 
 [[package]]
@@ -1013,14 +1052,14 @@ dependencies = [
 
 [[package]]
 name = "crossbeam-epoch"
-version = "0.9.3"
+version = "0.9.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2584f639eb95fea8c798496315b297cf81b9b58b6d30ab066a75455333cf4b12"
+checksum = "4ec02e091aa634e2c3ada4a392989e7c3116673ef0ac5b72232439094d73b7fd"
 dependencies = [
  "cfg-if 1.0.0",
- "crossbeam-utils 0.8.3",
+ "crossbeam-utils 0.8.5",
  "lazy_static",
- "memoffset 0.6.2",
+ "memoffset 0.6.4",
  "scopeguard",
 ]
 
@@ -1048,15 +1087,20 @@ dependencies = [
 
 [[package]]
 name = "crossbeam-utils"
-version = "0.8.3"
+version = "0.8.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e7e9d99fa91428effe99c5c6d4634cdeba32b8cf784fc428a2a687f61a952c49"
+checksum = "d82cfc11ce7f2c3faef78d8a684447b40d503d9681acebed6cb728d45940c4db"
 dependencies = [
- "autocfg",
  "cfg-if 1.0.0",
  "lazy_static",
 ]
 
+[[package]]
+name = "crunchy"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a2f4a431c5c9f662e1200b7c7f02c34e91361150e382089a8f2dec3ba680cbda"
+
 [[package]]
 name = "crunchy"
 version = "0.2.2"
@@ -1128,9 +1172,9 @@ dependencies = [
 
 [[package]]
 name = "curve25519-dalek"
-version = "3.0.2"
+version = "3.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f627126b946c25a4638eec0ea634fc52506dea98db118aae985118ce7c3d723f"
+checksum = "639891fde0dbea823fc3d798a0fdf9d2f9440a42d64a78ab3488b0ca025117b3"
 dependencies = [
  "byteorder",
  "digest 0.9.0",
@@ -1147,9 +1191,9 @@ checksum = "3ee2393c4a91429dffb4bedf19f4d6abf27d8a732c8ce4980305d782e5426d57"
 
 [[package]]
 name = "data-encoding-macro"
-version = "0.1.10"
+version = "0.1.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0a94feec3d2ba66c0b6621bca8bc6f68415b1e5c69af3586fdd0af9fd9f29b17"
+checksum = "86927b7cd2fe88fa698b87404b287ab98d1a0063a34071d92e575b72d3029aca"
 dependencies = [
  "data-encoding",
  "data-encoding-macro-internal",
@@ -1157,9 +1201,9 @@ dependencies = [
 
 [[package]]
 name = "data-encoding-macro-internal"
-version = "0.1.9"
+version = "0.1.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f0f83e699727abca3c56e187945f303389590305ab2f0185ea445aa66e8d5f2a"
+checksum = "a5bbed42daaa95e780b60a50546aa345b8413a1e46f9a40a12907d3598f038db"
 dependencies = [
  "data-encoding",
  "syn",
@@ -1167,9 +1211,9 @@ dependencies = [
 
 [[package]]
 name = "derive_more"
-version = "0.99.13"
+version = "0.99.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f82b1b72f1263f214c0f823371768776c4f5841b942c9883aa8e5ec584fd0ba6"
+checksum = "5cc7b9cef1e351660e5443924e4f43ab25fbbed3e9a5f052df3677deb4d6b320"
 dependencies = [
  "convert_case",
  "proc-macro2",
@@ -1197,9 +1241,9 @@ dependencies = [
 
 [[package]]
 name = "directories"
-version = "3.0.1"
+version = "3.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f8fed639d60b58d0f53498ab13d26f621fd77569cc6edb031f4cc36a2ad9da0f"
+checksum = "e69600ff1703123957937708eb27f7a564e48885c537782722ed0ba3189ce1d7"
 dependencies = [
  "dirs-sys",
 ]
@@ -1216,12 +1260,12 @@ dependencies = [
 
 [[package]]
 name = "dirs-sys"
-version = "0.3.5"
+version = "0.3.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8e93d7f5705de3e49895a2b5e0b8855a1c27f080192ae9c32a6432d50741a57a"
+checksum = "03d86534ed367a67548dc68113a0f5db55432fdfbb6e6f9d77704397d95d5780"
 dependencies = [
  "libc",
- "redox_users 0.3.5",
+ "redox_users",
  "winapi 0.3.9",
 ]
 
@@ -1232,7 +1276,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4ebda144c4fe02d1f7ea1a7d9641b6fc6b580adcfa024ae48797ecdeb6825b4d"
 dependencies = [
  "libc",
- "redox_users 0.4.0",
+ "redox_users",
  "winapi 0.3.9",
 ]
 
@@ -1275,9 +1319,9 @@ checksum = "ee2626afccd7561a06cf1367e2950c4718ea04565e20fb5029b6c7d8ad09abcf"
 
 [[package]]
 name = "ed25519"
-version = "1.0.3"
+version = "1.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "37c66a534cbb46ab4ea03477eae19d5c22c01da8258030280b7bd9d8433fb6ef"
+checksum = "8d0860415b12243916284c67a9be413e044ee6668247b99ba26d94b2bc06c8f6"
 dependencies = [
  "signature",
 ]
@@ -1288,11 +1332,11 @@ version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c762bae6dcaf24c4c84667b8579785430908723d5c889f469d76a41d59cc7a9d"
 dependencies = [
- "curve25519-dalek 3.0.2",
+ "curve25519-dalek 3.1.0",
  "ed25519",
  "rand 0.7.3",
  "serde",
- "sha2 0.9.3",
+ "sha2 0.9.5",
  "zeroize",
 ]
 
@@ -1317,15 +1361,15 @@ dependencies = [
 
 [[package]]
 name = "environmental"
-version = "1.1.2"
+version = "1.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6576a1755ddffd988788025e75bce9e74b018f7cc226198fe931d077911c6d7e"
+checksum = "68b91989ae21441195d7d9b9993a2f9295c7e1a8c96255d8b729accddc124797"
 
 [[package]]
 name = "erased-serde"
-version = "0.3.13"
+version = "0.3.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0465971a8cc1fa2455c8465aaa377131e1f1cf4983280f474a13e68793aa770c"
+checksum = "e5b36e6f2295f393f44894c6031f67df4d185b984cd54d08f768ce678007efcd"
 dependencies = [
  "serde",
 ]
@@ -1351,16 +1395,64 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "ethash"
+version = "1.12.0"
+dependencies = [
+ "crunchy 0.1.6",
+ "either",
+ "ethereum-types 0.9.2",
+ "keccak-hash",
+ "log",
+ "memmap",
+ "parking_lot 0.11.1",
+ "primal",
+ "rustc-hex 1.0.0",
+ "serde_json",
+ "tempdir",
+ "tiny-keccak",
+]
+
+[[package]]
+name = "ethash-rpc"
+version = "1.0.0"
+dependencies = [
+ "derive_more",
+ "ethash",
+ "futures 0.3.15",
+ "jsonrpc-core 15.1.0",
+ "jsonrpc-derive 15.1.0",
+ "log",
+ "parity-scale-codec 2.1.3",
+ "serde",
+ "serde_derive",
+ "serde_json",
+ "sp-core",
+]
+
+[[package]]
+name = "ethbloom"
+version = "0.9.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "71a6567e6fd35589fea0c63b94b4cf2e55573e413901bdbe60ab15cf0e25e5df"
+dependencies = [
+ "crunchy 0.2.2",
+ "fixed-hash 0.6.1",
+ "impl-rlp 0.2.1",
+ "impl-serde",
+ "tiny-keccak",
+]
+
 [[package]]
 name = "ethbloom"
 version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "779864b9c7f7ead1f092972c3257496c6a84b46dba2ce131dd8a282cb2cc5972"
 dependencies = [
- "crunchy",
- "fixed-hash",
- "impl-codec",
- "impl-rlp",
+ "crunchy 0.2.2",
+ "fixed-hash 0.7.0",
+ "impl-codec 0.5.0",
+ "impl-rlp 0.3.0",
  "impl-serde",
  "tiny-keccak",
 ]
@@ -1371,31 +1463,66 @@ version = "0.7.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "567ce064a8232c16e2b2c2173a936b91fbe35c2f2c5278871f5a1a31688b42e9"
 dependencies = [
- "ethereum-types",
+ "ethereum-types 0.11.0",
  "funty",
  "hash-db",
  "hash256-std-hasher",
- "parity-scale-codec",
- "rlp",
+ "parity-scale-codec 2.1.3",
+ "rlp 0.5.0",
  "rlp-derive",
  "serde",
  "sha3 0.9.1",
  "triehash",
 ]
 
+[[package]]
+name = "ethereum-types"
+version = "0.9.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "473aecff686bd8e7b9db0165cbbb53562376b39bf35b427f0c60446a9e1634b0"
+dependencies = [
+ "ethbloom 0.9.2",
+ "fixed-hash 0.6.1",
+ "impl-rlp 0.2.1",
+ "impl-serde",
+ "primitive-types 0.7.3",
+ "uint 0.8.5",
+]
+
 [[package]]
 name = "ethereum-types"
 version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f64b5df66a228d85e4b17e5d6c6aa43b0310898ffe8a85988c4c032357aaabfd"
 dependencies = [
- "ethbloom",
- "fixed-hash",
- "impl-codec",
- "impl-rlp",
+ "ethbloom 0.11.0",
+ "fixed-hash 0.7.0",
+ "impl-codec 0.5.0",
+ "impl-rlp 0.3.0",
  "impl-serde",
- "primitive-types",
- "uint",
+ "primitive-types 0.9.0",
+ "uint 0.9.0",
+]
+
+[[package]]
+name = "ethpow"
+version = "1.0.0"
+dependencies = [
+ "derive_more",
+ "ethash",
+ "ethereum-types 0.9.2",
+ "log",
+ "parity-scale-codec 2.1.3",
+ "sc-consensus-pow",
+ "serde",
+ "serde_derive",
+ "serde_json",
+ "sp-api",
+ "sp-blockchain",
+ "sp-consensus-pow",
+ "sp-core",
+ "sp-runtime",
+ "tempdir",
 ]
 
 [[package]]
@@ -1415,22 +1542,22 @@ dependencies = [
  "evm-gasometer",
  "evm-runtime",
  "log",
- "parity-scale-codec",
- "primitive-types",
- "rlp",
+ "parity-scale-codec 2.1.3",
+ "primitive-types 0.9.0",
+ "rlp 0.5.0",
  "serde",
  "sha3 0.8.2",
 ]
 
 [[package]]
 name = "evm-core"
-version = "0.25.0"
+version = "0.25.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6b4eea3882c798813a6f92e8855ec1fc3f5ababd8b274cb81d4bedee701b478e"
+checksum = "e1e6640dd44ba663316c7121e0c6fee38000d8249127fd9221bfdc331f75cbfe"
 dependencies = [
  "funty",
- "parity-scale-codec",
- "primitive-types",
+ "parity-scale-codec 2.1.3",
+ "primitive-types 0.9.0",
  "serde",
 ]
 
@@ -1442,7 +1569,7 @@ checksum = "0a8f04dcc8b0296652eabfa443a08ebed6071a1178e0f42a7f7b63a612bddf0b"
 dependencies = [
  "evm-core",
  "evm-runtime",
- "primitive-types",
+ "primitive-types 0.9.0",
 ]
 
 [[package]]
@@ -1452,7 +1579,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "54c302f29ca8bba82a382aa52d427869964179e4f24eae57bde70958ce9b7607"
 dependencies = [
  "evm-core",
- "primitive-types",
+ "primitive-types 0.9.0",
  "sha3 0.8.2",
 ]
 
@@ -1462,7 +1589,7 @@ version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e43f2f1833d64e33f15592464d6fdd70f349dda7b1a53088eb83cd94014008c5"
 dependencies = [
- "futures 0.3.13",
+ "futures 0.3.15",
 ]
 
 [[package]]
@@ -1501,9 +1628,9 @@ checksum = "4443176a9f2c162692bd3d352d745ef9413eec5782a80d8fd6f8a1ac692a07f7"
 
 [[package]]
 name = "fastrand"
-version = "1.4.0"
+version = "1.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ca5faf057445ce5c9d4329e382b2ce7ca38550ef3b73a5348362d5f24e0c7fe3"
+checksum = "77b705829d1e87f762c2df6da140b26af5839e1033aa84aa5f56bb688e4e1bdb"
 dependencies = [
  "instant",
 ]
@@ -1518,9 +1645,9 @@ dependencies = [
  "fc-db",
  "fp-consensus",
  "fp-rpc",
- "futures 0.3.13",
+ "futures 0.3.15",
  "log",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "sc-client-api",
  "sp-api",
  "sp-block-builder",
@@ -1541,7 +1668,7 @@ checksum = "5447bcaec37cde97f067060e449347948a72e594cda064625aa394bfab8c23b8"
 dependencies = [
  "kvdb",
  "kvdb-rocksdb",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "parking_lot 0.11.1",
  "sp-core",
  "sp-database",
@@ -1558,7 +1685,7 @@ dependencies = [
  "fc-db",
  "fp-consensus",
  "fp-rpc",
- "futures 0.3.13",
+ "futures 0.3.15",
  "futures-timer 3.0.2",
  "log",
  "sc-client-api",
@@ -1574,7 +1701,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5682990c26ec58939c6f80955dfe5069b57b87fab8884a193508b00f59e8c2f2"
 dependencies = [
  "ethereum",
- "ethereum-types",
+ "ethereum-types 0.11.0",
  "evm",
  "fc-consensus",
  "fc-db",
@@ -1583,7 +1710,7 @@ dependencies = [
  "fp-evm",
  "fp-rpc",
  "fp-storage",
- "futures 0.3.13",
+ "futures 0.3.15",
  "jsonrpc-core 15.1.0",
  "jsonrpc-core-client 14.2.0",
  "jsonrpc-derive 14.2.2",
@@ -1592,10 +1719,10 @@ dependencies = [
  "log",
  "pallet-ethereum",
  "pallet-evm",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "rand 0.7.3",
- "rlp",
- "rustc-hex",
+ "rlp 0.5.0",
+ "rustc-hex 2.1.0",
  "sc-client-api",
  "sc-network",
  "sc-rpc",
@@ -1615,12 +1742,12 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "19349ccb13096ea4a33c93d7b90e2d11403285039c502d74a87cd127c83430e3"
 dependencies = [
- "ethereum-types",
+ "ethereum-types 0.11.0",
  "jsonrpc-core 15.1.0",
  "jsonrpc-core-client 14.2.0",
  "jsonrpc-derive 14.2.2",
  "jsonrpc-pubsub 15.1.0",
- "rustc-hex",
+ "rustc-hex 2.1.0",
  "serde",
  "serde_json",
 ]
@@ -1651,14 +1778,26 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2cd795898c348a8ec9edc66ec9e014031c764d4c88cc26d09b492cd93eb41339"
 dependencies = [
  "either",
- "futures 0.3.13",
+ "futures 0.3.15",
  "futures-timer 3.0.2",
  "log",
  "num-traits",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "parking_lot 0.11.1",
 ]
 
+[[package]]
+name = "fixed-hash"
+version = "0.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "11498d382790b7a8f2fd211780bec78619bba81cdad3a283997c0c41f836759c"
+dependencies = [
+ "byteorder",
+ "rand 0.7.3",
+ "rustc-hex 2.1.0",
+ "static_assertions",
+]
+
 [[package]]
 name = "fixed-hash"
 version = "0.7.0"
@@ -1666,8 +1805,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cfcf0ed7fe52a17a03854ec54a9f76d6d84508d1c0e66bc1793301c73fc8493c"
 dependencies = [
  "byteorder",
- "rand 0.8.3",
- "rustc-hex",
+ "rand 0.8.4",
+ "rustc-hex 2.1.0",
  "static_assertions",
 ]
 
@@ -1702,7 +1841,7 @@ version = "3.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "632b95f97f332b2ff5bc3a42bc8e28772b067e333830e03fd046504f11cd0fb8"
 dependencies = [
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
 ]
 
 [[package]]
@@ -1722,8 +1861,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1299a98963d09d7bc196e42d2a156abb3ea9c2c262771ba2f30d47ed6f5c678a"
 dependencies = [
  "ethereum",
- "parity-scale-codec",
- "rlp",
+ "parity-scale-codec 2.1.3",
+ "rlp 0.5.0",
  "sha3 0.8.2",
  "sp-core",
  "sp-runtime",
@@ -1738,7 +1877,7 @@ checksum = "29862d19f1ad6ad2956dfe157964005dd7f8af3caf1e6f1fa194695ef14a3be3"
 dependencies = [
  "evm",
  "impl-trait-for-tuples 0.1.3",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "serde",
  "sp-core",
  "sp-std 3.0.0",
@@ -1751,9 +1890,9 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c58fe2c9fe2f296ad363bdd552bad8718ebf675735c02ef857ae2713bdea4822"
 dependencies = [
  "ethereum",
- "ethereum-types",
+ "ethereum-types 0.11.0",
  "fp-evm",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "sp-api",
  "sp-core",
  "sp-io",
@@ -1763,19 +1902,9 @@ dependencies = [
 
 [[package]]
 name = "fp-storage"
-version = "1.0.0"
+version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d65fe4d695f44d5fbcfcefa77b4192d402e1c3bfed1c27afdd19b60ead757ece"
-dependencies = [
- "ethereum",
- "ethereum-types",
- "fp-evm",
- "parity-scale-codec",
- "sp-api",
- "sp-core",
- "sp-runtime",
- "sp-std 3.0.0",
-]
+checksum = "41357d4af97038b092e6f568259772cdb959df132d6241076499db69f38a2de9"
 
 [[package]]
 name = "frame-benchmarking"
@@ -1786,8 +1915,8 @@ dependencies = [
  "frame-support",
  "frame-system",
  "linregress",
- "parity-scale-codec",
- "paste 1.0.5",
+ "parity-scale-codec 2.1.3",
+ "paste",
  "sp-api",
  "sp-io",
  "sp-runtime",
@@ -1806,7 +1935,7 @@ dependencies = [
  "chrono",
  "frame-benchmarking",
  "handlebars",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "sc-cli",
  "sc-client-db",
  "sc-executor",
@@ -1828,7 +1957,7 @@ checksum = "1da8fd471442bee91b9b3f587ec832e3f47800374fdb89b4a66591cd7c42b29f"
 dependencies = [
  "frame-support",
  "frame-system",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "serde",
  "sp-core",
  "sp-io",
@@ -1843,7 +1972,7 @@ version = "13.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "073f7bef18421362441a1708f8528e442234954611f95bdc554b313fb321948e"
 dependencies = [
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "serde",
  "sp-core",
  "sp-std 3.0.0",
@@ -1861,8 +1990,8 @@ dependencies = [
  "impl-trait-for-tuples 0.2.1",
  "log",
  "once_cell",
- "parity-scale-codec",
- "paste 1.0.5",
+ "parity-scale-codec 2.1.3",
+ "paste",
  "serde",
  "smallvec 1.6.1",
  "sp-arithmetic",
@@ -1896,7 +2025,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d4f88cfd111e004590f4542b75e6d3302137b9067d7e7219e4ac47a535c3b5c1"
 dependencies = [
  "frame-support-procedural-tools-derive",
- "proc-macro-crate",
+ "proc-macro-crate 0.1.5",
  "proc-macro2",
  "quote",
  "syn",
@@ -1921,7 +2050,7 @@ checksum = "f5fedbff05d665c00bf4e089b4377fcb15b8bd37ebc3e5fc06665474cf6e25d7"
 dependencies = [
  "frame-support",
  "impl-trait-for-tuples 0.2.1",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "serde",
  "sp-core",
  "sp-io",
@@ -1939,7 +2068,7 @@ dependencies = [
  "frame-benchmarking",
  "frame-support",
  "frame-system",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "sp-core",
  "sp-runtime",
  "sp-std 3.0.0",
@@ -1951,7 +2080,7 @@ version = "3.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5cb9d2f86a903fdee4ca3d660c767e69a743cee8aeb103563a14ea52e9f0001d"
 dependencies = [
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "sp-api",
 ]
 
@@ -1963,7 +2092,7 @@ checksum = "03d47dad3685eceed8488986cad3d5027165ea5edb164331770e2059555f10a5"
 dependencies = [
  "lazy_static",
  "libc",
- "libloading",
+ "libloading 0.5.2",
  "winapi 0.3.9",
 ]
 
@@ -2013,9 +2142,9 @@ checksum = "3a471a38ef8ed83cd6e40aa59c1ffe17db6855c18e3604d9c4ed8c08ebc28678"
 
 [[package]]
 name = "futures"
-version = "0.3.13"
+version = "0.3.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7f55667319111d593ba876406af7c409c0ebb44dc4be6132a783ccf163ea14c1"
+checksum = "0e7e43a803dae2fa37c1f6a8fe121e1f7bf9548b4dfc0522a42f34145dadfc27"
 dependencies = [
  "futures-channel",
  "futures-core",
@@ -2028,9 +2157,9 @@ dependencies = [
 
 [[package]]
 name = "futures-channel"
-version = "0.3.13"
+version = "0.3.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8c2dd2df839b57db9ab69c2c9d8f3e8c81984781937fe2807dc6dcf3b2ad2939"
+checksum = "e682a68b29a882df0545c143dc3646daefe80ba479bcdede94d5a703de2871e2"
 dependencies = [
  "futures-core",
  "futures-sink",
@@ -2038,9 +2167,9 @@ dependencies = [
 
 [[package]]
 name = "futures-core"
-version = "0.3.13"
+version = "0.3.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "15496a72fabf0e62bdc3df11a59a3787429221dd0710ba8ef163d6f7a9112c94"
+checksum = "0402f765d8a89a26043b889b26ce3c4679d268fa6bb22cd7c6aad98340e179d1"
 
 [[package]]
 name = "futures-cpupool"
@@ -2059,20 +2188,20 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fdcef58a173af8148b182684c9f2d5250875adbcaff7b5794073894f9d8634a9"
 dependencies = [
  "futures 0.1.31",
- "futures 0.3.13",
+ "futures 0.3.15",
  "lazy_static",
  "log",
  "parking_lot 0.9.0",
- "pin-project 0.4.27",
+ "pin-project 0.4.28",
  "serde",
  "serde_json",
 ]
 
 [[package]]
 name = "futures-executor"
-version = "0.3.13"
+version = "0.3.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "891a4b7b96d84d5940084b2a37632dd65deeae662c114ceaa2c879629c9c0ad1"
+checksum = "badaa6a909fac9e7236d0620a2f57f7664640c56575b71a7552fbd68deafab79"
 dependencies = [
  "futures-core",
  "futures-task",
@@ -2082,15 +2211,15 @@ dependencies = [
 
 [[package]]
 name = "futures-io"
-version = "0.3.13"
+version = "0.3.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d71c2c65c57704c32f5241c1223167c2c3294fd34ac020c807ddbe6db287ba59"
+checksum = "acc499defb3b348f8d8f3f66415835a9131856ff7714bf10dadfc4ec4bdb29a1"
 
 [[package]]
 name = "futures-lite"
-version = "1.11.3"
+version = "1.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b4481d0cd0de1d204a4fa55e7d45f07b1d958abcb06714b3446438e2eff695fb"
+checksum = "7694489acd39452c77daa48516b894c153f192c3578d5a839b62c58099fcbf48"
 dependencies = [
  "fastrand",
  "futures-core",
@@ -2103,10 +2232,11 @@ dependencies = [
 
 [[package]]
 name = "futures-macro"
-version = "0.3.13"
+version = "0.3.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ea405816a5139fb39af82c2beb921d52143f556038378d6db21183a5c37fbfb7"
+checksum = "a4c40298486cdf52cc00cd6d6987892ba502c7656a16a4192a9992b1ccedd121"
 dependencies = [
+ "autocfg",
  "proc-macro-hack",
  "proc-macro2",
  "quote",
@@ -2120,21 +2250,21 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3a1387e07917c711fb4ee4f48ea0adb04a3c9739e53ef85bf43ae1edc2937a8b"
 dependencies = [
  "futures-io",
- "rustls 0.19.0",
+ "rustls 0.19.1",
  "webpki",
 ]
 
 [[package]]
 name = "futures-sink"
-version = "0.3.13"
+version = "0.3.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "85754d98985841b7d4f5e8e6fbfa4a4ac847916893ec511a2917ccd8525b8bb3"
+checksum = "a57bead0ceff0d6dde8f465ecd96c9338121bb7717d3e7b108059531870c4282"
 
 [[package]]
 name = "futures-task"
-version = "0.3.13"
+version = "0.3.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fa189ef211c15ee602667a6fcfe1c1fd9e07d42250d2156382820fba33c9df80"
+checksum = "8a16bef9fc1a4dddb5bee51c989e3fbba26569cbb0e31f5b303c184e3dd33dae"
 
 [[package]]
 name = "futures-timer"
@@ -2150,10 +2280,11 @@ checksum = "e64b03909df88034c26dc1547e8970b91f98bdb65165d6a4e9110d94263dbb2c"
 
 [[package]]
 name = "futures-util"
-version = "0.3.13"
+version = "0.3.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1812c7ab8aedf8d6f2701a43e1243acdbcc2b36ab26e2ad421eb99ac963d96d1"
+checksum = "feb5c238d27e2bf94ffdfd27b2c29e3df4a68c4193bb6427384259e2bf191967"
 dependencies = [
+ "autocfg",
  "futures 0.1.31",
  "futures-channel",
  "futures-core",
@@ -2184,15 +2315,6 @@ dependencies = [
  "typenum",
 ]
 
-[[package]]
-name = "generic-array"
-version = "0.13.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f797e67af32588215eaaab8327027ee8e71b9dd0b2b26996aedf20c030fce309"
-dependencies = [
- "typenum",
-]
-
 [[package]]
 name = "generic-array"
 version = "0.14.4"
@@ -2216,9 +2338,9 @@ dependencies = [
 
 [[package]]
 name = "getrandom"
-version = "0.2.2"
+version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c9495705279e7140bf035dde1f6e750c162df8b625267cd52cc44e0b156732c8"
+checksum = "7fcd999463524c52659517fe2cea98493cfe485d10565e7b0fb07dbba7ad2753"
 dependencies = [
  "cfg-if 1.0.0",
  "libc",
@@ -2246,6 +2368,12 @@ dependencies = [
  "stable_deref_trait",
 ]
 
+[[package]]
+name = "gimli"
+version = "0.24.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0e4075386626662786ddb0ec9081e7c7eeb1ba31951f447ca780ef9f5d568189"
+
 [[package]]
 name = "glob"
 version = "0.3.0"
@@ -2254,9 +2382,9 @@ checksum = "9b919933a397b79c37e33b77bb2aa3dc8eb6e165ad809e58ff75bc7db2e34574"
 
 [[package]]
 name = "globset"
-version = "0.4.6"
+version = "0.4.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c152169ef1e421390738366d2f796655fec62621dabbd0fd476f905934061e4a"
+checksum = "f0fc1b9fa0e64ffb1aa5b95daa0f0f167734fd528b7c02eabc581d9d843649b1"
 dependencies = [
  "aho-corasick",
  "bstr",
@@ -2307,7 +2435,7 @@ dependencies = [
  "futures-core",
  "futures-sink",
  "futures-util",
- "http 0.2.3",
+ "http 0.2.4",
  "indexmap",
  "slab",
  "tokio 0.2.25",
@@ -2316,16 +2444,22 @@ dependencies = [
  "tracing-futures",
 ]
 
+[[package]]
+name = "hamming"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "65043da274378d68241eb9a8f8f8aa54e349136f7b8e12f63e3ef44043cc30e1"
+
 [[package]]
 name = "handlebars"
-version = "3.5.4"
+version = "3.5.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "580b6f551b29a3a02436318aed09ba1c58eea177dc49e39beac627ad356730a5"
+checksum = "4498fc115fa7d34de968184e473529abb40eeb6be8bc5f7faba3d08c316cb3e3"
 dependencies = [
  "log",
  "pest",
  "pest_derive",
- "quick-error 2.0.0",
+ "quick-error 2.0.1",
  "serde",
  "serde_json",
 ]
@@ -2342,7 +2476,7 @@ version = "0.15.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "92c171d55b98633f4ed3860808f004099b36c1cc29c42cfc53aa8591b21efcf2"
 dependencies = [
- "crunchy",
+ "crunchy 0.2.2",
 ]
 
 [[package]]
@@ -2356,9 +2490,9 @@ dependencies = [
 
 [[package]]
 name = "heck"
-version = "0.3.2"
+version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "87cbf45460356b7deeb5e3415b5563308c0a9b057c85e12b06ad551f98d0a6ac"
+checksum = "6d621efb26863f0e9924c6ac577e8275e5e6b77455db64ffa6c65c904e9e132c"
 dependencies = [
  "unicode-segmentation",
 ]
@@ -2434,9 +2568,9 @@ dependencies = [
 
 [[package]]
 name = "http"
-version = "0.2.3"
+version = "0.2.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7245cd7449cc792608c3c8a9eaf69bd4eabbabf802713748fd739c98b82f0747"
+checksum = "527e8c9ac747e28542699a951517aa9a6945af506cd1f2e1b53a576c17b6cc11"
 dependencies = [
  "bytes 1.0.1",
  "fnv",
@@ -2462,14 +2596,14 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "13d5ff830006f7646652e057693569bfe0d51760c0085a071769d142a205111b"
 dependencies = [
  "bytes 0.5.6",
- "http 0.2.3",
+ "http 0.2.4",
 ]
 
 [[package]]
 name = "httparse"
-version = "1.3.5"
+version = "1.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "615caabe2c3160b313d52ccc905335f4ed5f10881dd63dc5699d47e90be85691"
+checksum = "f3a87b616e37e93c22fb19bcd386f02f3af5ea98a25670ad0fce773de23c5e68"
 
 [[package]]
 name = "httpdate"
@@ -2527,12 +2661,12 @@ dependencies = [
  "futures-core",
  "futures-util",
  "h2 0.2.7",
- "http 0.2.3",
+ "http 0.2.4",
  "http-body 0.3.1",
  "httparse",
  "httpdate",
  "itoa",
- "pin-project 1.0.6",
+ "pin-project 1.0.7",
  "socket2 0.3.19",
  "tokio 0.2.25",
  "tower-service",
@@ -2571,9 +2705,9 @@ dependencies = [
 
 [[package]]
 name = "idna"
-version = "0.2.2"
+version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "89829a5d69c23d348314a7ac337fe39173b61149a9864deabd260983aed48c21"
+checksum = "418a0a6fab821475f634efe3ccc45c013f742efe03d853e8d3355d5cb850ecf8"
 dependencies = [
  "matches",
  "unicode-bidi",
@@ -2608,7 +2742,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "97b8538953a3f0d0d3868f0a706eb4273535e10d72acb5c82c1c23ae48835c85"
 dependencies = [
  "async-io",
- "futures 0.3.13",
+ "futures 0.3.15",
  "futures-lite",
  "if-addrs",
  "ipnet",
@@ -2617,13 +2751,31 @@ dependencies = [
  "winapi 0.3.9",
 ]
 
+[[package]]
+name = "impl-codec"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1be51a921b067b0eaca2fad532d9400041561aa922221cc65f95a85641c6bf53"
+dependencies = [
+ "parity-scale-codec 1.3.7",
+]
+
 [[package]]
 name = "impl-codec"
 version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "df170efa359aebdd5cb7fe78edcc67107748e4737bdca8a8fb40d15ea7a877ed"
 dependencies = [
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
+]
+
+[[package]]
+name = "impl-rlp"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8f7a72f11830b52333f36e3b09a288333888bf54380fd0ac0790a3c31ab0f3c5"
+dependencies = [
+ "rlp 0.4.6",
 ]
 
 [[package]]
@@ -2632,7 +2784,7 @@ version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f28220f89297a075ddc7245cd538076ee98b01f2a9c23a53a4f1105d5a322808"
 dependencies = [
- "rlp",
+ "rlp 0.5.0",
 ]
 
 [[package]]
@@ -2701,7 +2853,7 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "64fa110ec7b8f493f416eed552740d10e7030ad5f63b2308f82c9608ec2df275"
 dependencies = [
- "futures 0.3.13",
+ "futures 0.3.15",
  "futures-timer 2.0.2",
 ]
 
@@ -2722,9 +2874,9 @@ checksum = "2ee15951c035f79eddbef745611ec962f63f4558f1dadf98ab723cc603487c6f"
 
 [[package]]
 name = "ipnet"
-version = "2.3.0"
+version = "2.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "47be2f14c678be2fdcab04ab1171db51b2762ce6f0a8ee87c8dd4a04ed216135"
+checksum = "68f2d64f2edebec4ce84ad108148e67e1064789bee435edc5b60ad398714a3a9"
 
 [[package]]
 name = "itertools"
@@ -2743,18 +2895,18 @@ checksum = "dd25036021b0de88a0aff6b850051563c6516d0bf53f8638938edbb9de732736"
 
 [[package]]
 name = "jobserver"
-version = "0.1.21"
+version = "0.1.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5c71313ebb9439f74b00d9d2dcec36440beaf57a6aa0623068441dd7cd81a7f2"
+checksum = "972f5ae5d1cb9c6ae417789196c803205313edde988685da5e3aae0827b9e7fd"
 dependencies = [
  "libc",
 ]
 
 [[package]]
 name = "js-sys"
-version = "0.3.49"
+version = "0.3.51"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dc15e39392125075f60c95ba416f5381ff6c3a948ff02ab12464715adf56c821"
+checksum = "83bdfbace3a0e81a4253f73b49e960b053e396a11012cbd49b9b74d6a2b67062"
 dependencies = [
  "wasm-bindgen",
 ]
@@ -2841,7 +2993,7 @@ version = "14.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d0e77e8812f02155b85a677a96e1d16b60181950c0636199bc4528524fba98dc"
 dependencies = [
- "proc-macro-crate",
+ "proc-macro-crate 0.1.5",
  "proc-macro2",
  "quote",
  "syn",
@@ -2853,7 +3005,7 @@ version = "15.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "99a847f9ec7bb52149b2786a17c9cb260d6effc6b8eeb8c16b343a487a7563a3"
 dependencies = [
- "proc-macro-crate",
+ "proc-macro-crate 0.1.5",
  "proc-macro2",
  "quote",
  "syn",
@@ -2950,6 +3102,16 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "67c21572b4949434e4fc1e1978b99c5f77064153c59d998bf13ecd96fb5ecba7"
 
+[[package]]
+name = "keccak-hash"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1f58a51ef3df9398cf2434bea8d4eb61fb748d0feb1571f87388579a120a4c8f"
+dependencies = [
+ "primitive-types 0.7.3",
+ "tiny-keccak",
+]
+
 [[package]]
 name = "kernel32-sys"
 version = "0.2.2"
@@ -2992,9 +3154,9 @@ dependencies = [
 
 [[package]]
 name = "kvdb-rocksdb"
-version = "0.11.0"
+version = "0.11.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "34446c373ccc494c2124439281c198c7636ccdc2752c06722bbffd56d459c1e4"
+checksum = "94b27cdb788bf1c8ade782289f9dbee626940be2961fd75c7cde993fa2f1ded1"
 dependencies = [
  "fs-swap",
  "kvdb",
@@ -3031,9 +3193,9 @@ checksum = "3576a87f2ba00f6f106fdfcd16db1d698d648a26ad8e0573cad8537c3c362d2a"
 
 [[package]]
 name = "libc"
-version = "0.2.91"
+version = "0.2.97"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8916b1f6ca17130ec6568feccee27c156ad12037880833a3b842a823236502e7"
+checksum = "12b8adadd720df158f4d70dfe7ccc6adb0472d7c55ca83445f6a5ab3e36f8fb6"
 
 [[package]]
 name = "libloading"
@@ -3045,6 +3207,16 @@ dependencies = [
  "winapi 0.3.9",
 ]
 
+[[package]]
+name = "libloading"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6f84d96438c15fcd6c3f244c8fce01d1e2b9c6b5623e9c711dc9286d8fc92d6a"
+dependencies = [
+ "cfg-if 1.0.0",
+ "winapi 0.3.9",
+]
+
 [[package]]
 name = "libm"
 version = "0.2.1"
@@ -3059,7 +3231,7 @@ checksum = "d5133112ce42be9482f6a87be92a605dd6bbc9e93c297aee77d172ff06908f3a"
 dependencies = [
  "atomic",
  "bytes 1.0.1",
- "futures 0.3.13",
+ "futures 0.3.15",
  "lazy_static",
  "libp2p-core",
  "libp2p-core-derive",
@@ -3084,7 +3256,7 @@ dependencies = [
  "libp2p-yamux",
  "parity-multiaddr",
  "parking_lot 0.11.1",
- "pin-project 1.0.6",
+ "pin-project 1.0.7",
  "smallvec 1.6.1",
  "wasm-timer",
 ]
@@ -3100,7 +3272,7 @@ dependencies = [
  "ed25519-dalek",
  "either",
  "fnv",
- "futures 0.3.13",
+ "futures 0.3.15",
  "futures-timer 3.0.2",
  "lazy_static",
  "libsecp256k1",
@@ -3109,13 +3281,13 @@ dependencies = [
  "multistream-select",
  "parity-multiaddr",
  "parking_lot 0.11.1",
- "pin-project 1.0.6",
+ "pin-project 1.0.7",
  "prost",
  "prost-build",
  "rand 0.7.3",
  "ring",
  "rw-stream-sink",
- "sha2 0.9.3",
+ "sha2 0.9.5",
  "smallvec 1.6.1",
  "thiserror",
  "unsigned-varint 0.7.0",
@@ -3140,7 +3312,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6d42eed63305f0420736fa487f9acef720c4528bd7852a6a760f5ccde4813345"
 dependencies = [
  "flate2",
- "futures 0.3.13",
+ "futures 0.3.15",
  "libp2p-core",
 ]
 
@@ -3150,7 +3322,7 @@ version = "0.27.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5153b6db68fd4baa3b304e377db744dd8fea8ff4e4504509ee636abcde88d3e3"
 dependencies = [
- "futures 0.3.13",
+ "futures 0.3.15",
  "libp2p-core",
  "log",
 ]
@@ -3163,7 +3335,7 @@ checksum = "b3c63dfa06581b24b1d12bf9815b43689a784424be217d6545c800c7c75a207f"
 dependencies = [
  "cuckoofilter",
  "fnv",
- "futures 0.3.13",
+ "futures 0.3.15",
  "libp2p-core",
  "libp2p-swarm",
  "log",
@@ -3184,7 +3356,7 @@ dependencies = [
  "byteorder",
  "bytes 1.0.1",
  "fnv",
- "futures 0.3.13",
+ "futures 0.3.15",
  "hex_fmt",
  "libp2p-core",
  "libp2p-swarm",
@@ -3193,7 +3365,7 @@ dependencies = [
  "prost-build",
  "rand 0.7.3",
  "regex",
- "sha2 0.9.3",
+ "sha2 0.9.5",
  "smallvec 1.6.1",
  "unsigned-varint 0.6.0",
  "wasm-timer",
@@ -3205,7 +3377,7 @@ version = "0.27.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b40fb36a059b7a8cce1514bd8b546fa612e006c9937caa7f5950cb20021fe91e"
 dependencies = [
- "futures 0.3.13",
+ "futures 0.3.15",
  "libp2p-core",
  "libp2p-swarm",
  "log",
@@ -3226,16 +3398,16 @@ dependencies = [
  "bytes 1.0.1",
  "either",
  "fnv",
- "futures 0.3.13",
+ "futures 0.3.15",
  "libp2p-core",
  "libp2p-swarm",
  "log",
  "prost",
  "prost-build",
  "rand 0.7.3",
- "sha2 0.9.3",
+ "sha2 0.9.5",
  "smallvec 1.6.1",
- "uint",
+ "uint 0.9.0",
  "unsigned-varint 0.7.0",
  "void",
  "wasm-timer",
@@ -3250,7 +3422,7 @@ dependencies = [
  "async-io",
  "data-encoding",
  "dns-parser",
- "futures 0.3.13",
+ "futures 0.3.15",
  "if-watch",
  "lazy_static",
  "libp2p-core",
@@ -3270,7 +3442,7 @@ checksum = "350ce8b3923594aedabd5d6e3f875d058435052a29c3f32df378bc70d10be464"
 dependencies = [
  "asynchronous-codec 0.6.0",
  "bytes 1.0.1",
- "futures 0.3.13",
+ "futures 0.3.15",
  "libp2p-core",
  "log",
  "nohash-hasher",
@@ -3287,15 +3459,15 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4aca322b52a0c5136142a7c3971446fb1e9964923a526c9cc6ef3b7c94e57778"
 dependencies = [
  "bytes 1.0.1",
- "curve25519-dalek 3.0.2",
- "futures 0.3.13",
+ "curve25519-dalek 3.1.0",
+ "futures 0.3.15",
  "lazy_static",
  "libp2p-core",
  "log",
  "prost",
  "prost-build",
  "rand 0.7.3",
- "sha2 0.9.3",
+ "sha2 0.9.5",
  "snow",
  "static_assertions",
  "x25519-dalek",
@@ -3308,7 +3480,7 @@ version = "0.27.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6f3813276d0708c8db0f500d8beda1bda9ad955723b9cb272c41f4727256f73c"
 dependencies = [
- "futures 0.3.13",
+ "futures 0.3.15",
  "libp2p-core",
  "libp2p-swarm",
  "log",
@@ -3325,7 +3497,7 @@ checksum = "9d58defcadb646ae4b033e130b48d87410bf76394dc3335496cae99dac803e61"
 dependencies = [
  "asynchronous-codec 0.6.0",
  "bytes 1.0.1",
- "futures 0.3.13",
+ "futures 0.3.15",
  "libp2p-core",
  "log",
  "prost",
@@ -3340,9 +3512,9 @@ version = "0.20.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6ce3374f3b28162db9d3442c9347c4f14cb01e8290052615c7d341d40eae0599"
 dependencies = [
- "futures 0.3.13",
+ "futures 0.3.15",
  "log",
- "pin-project 1.0.6",
+ "pin-project 1.0.7",
  "rand 0.7.3",
  "salsa20",
  "sha3 0.9.1",
@@ -3356,7 +3528,7 @@ checksum = "10e5552827c33d8326502682da73a0ba4bfa40c1b55b216af3c303f32169dd89"
 dependencies = [
  "async-trait",
  "bytes 1.0.1",
- "futures 0.3.13",
+ "futures 0.3.15",
  "libp2p-core",
  "libp2p-swarm",
  "log",
@@ -3375,7 +3547,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7955b973e1fd2bd61ffd43ce261c1223f61f4aacd5bae362a924993f9a25fd98"
 dependencies = [
  "either",
- "futures 0.3.13",
+ "futures 0.3.15",
  "libp2p-core",
  "log",
  "rand 0.7.3",
@@ -3391,7 +3563,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "88a5aef80e519a6cb8e2663605142f97baaaea1a252eecbf8756184765f7471b"
 dependencies = [
  "async-io",
- "futures 0.3.13",
+ "futures 0.3.15",
  "futures-timer 3.0.2",
  "if-watch",
  "ipnet",
@@ -3408,7 +3580,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "80ac51ce419f60be966e02103c17f67ff5dc4422ba83ba54d251d6c62a4ed487"
 dependencies = [
  "async-std",
- "futures 0.3.13",
+ "futures 0.3.15",
  "libp2p-core",
  "log",
 ]
@@ -3419,7 +3591,7 @@ version = "0.27.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6149c46cb76935c80bc8be6ec6e3ebd5f5e1679765a255fb34331d54610f15dd"
 dependencies = [
- "futures 0.3.13",
+ "futures 0.3.15",
  "js-sys",
  "libp2p-core",
  "parity-send-wrapper",
@@ -3434,14 +3606,14 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d3b1c6a3431045da8b925ed83384e4c5163e14b990572307fca9c507435d4d22"
 dependencies = [
  "either",
- "futures 0.3.13",
+ "futures 0.3.15",
  "futures-rustls",
  "libp2p-core",
  "log",
  "quicksink",
  "rw-stream-sink",
  "soketto",
- "url 2.2.1",
+ "url 2.2.2",
  "webpki-roots",
 ]
 
@@ -3451,7 +3623,7 @@ version = "0.30.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4819358c542a86ff95f6ae691efb4b94ddaf477079b01a686f5705b79bfc232a"
 dependencies = [
- "futures 0.3.13",
+ "futures 0.3.15",
  "libp2p-core",
  "parking_lot 0.11.1",
  "thiserror",
@@ -3460,9 +3632,9 @@ dependencies = [
 
 [[package]]
 name = "librocksdb-sys"
-version = "6.11.4"
+version = "6.17.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "eb5b56f651c204634b936be2f92dbb42c36867e00ff7fe2405591f3b9fa66f09"
+checksum = "5da125e1c0f22c7cae785982115523a0738728498547f415c9054cb17c7e89f9"
 dependencies = [
  "bindgen",
  "cc",
@@ -3477,7 +3649,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1fc1e2c808481a63dc6da2074752fdd4336a3c8fcc68b83db6f1fd5224ae7962"
 dependencies = [
  "arrayref",
- "crunchy",
+ "crunchy 0.2.2",
  "digest 0.8.1",
  "hmac-drbg",
  "rand 0.7.3",
@@ -3488,9 +3660,9 @@ dependencies = [
 
 [[package]]
 name = "libz-sys"
-version = "1.1.2"
+version = "1.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "602113192b08db8f38796c4e85c39e960c145965140e918018bcde1952429655"
+checksum = "de5435b8549c16d423ed0c03dbaafe57cf6c3344744f1242520d59c9d8ecec66"
 dependencies = [
  "cc",
  "pkg-config",
@@ -3514,11 +3686,11 @@ dependencies = [
 
 [[package]]
 name = "linregress"
-version = "0.4.0"
+version = "0.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0d0ad4b5cc8385a881c561fac3501353d63d2a2b7a357b5064d71815c9a92724"
+checksum = "b1ff7f341d23e1275eec0656a9a07225fcc86216c4322392868adffe59023d1a"
 dependencies = [
- "nalgebra",
+ "nalgebra 0.27.1",
  "statrs",
 ]
 
@@ -3533,9 +3705,9 @@ dependencies = [
 
 [[package]]
 name = "lock_api"
-version = "0.4.2"
+version = "0.4.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dd96ffd135b2fd7b973ac026d28085defbe8983df057ced3eb4f2130b0831312"
+checksum = "0382880606dff6d15c9476c416d18690b72742aa7b605bb6dd6ec9030fbf07eb"
 dependencies = [
  "scopeguard",
 ]
@@ -3591,9 +3763,9 @@ checksum = "7ffc5c5338469d4d3ea17d269fa8ea3512ad247247c30bd2df69e68309ed0a08"
 
 [[package]]
 name = "matrixmultiply"
-version = "0.2.4"
+version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "916806ba0031cd542105d916a97c8572e1fa6dd79c9c51e7eb43a09ec2dd84c1"
+checksum = "5a8a15b776d9dfaecd44b03c5828c2199cddff5247215858aac14624f8d6b741"
 dependencies = [
  "rawpointer",
 ]
@@ -3606,15 +3778,25 @@ checksum = "60302e4db3a61da70c0cb7991976248362f30319e88850c487b9b95bbf059e00"
 
 [[package]]
 name = "memchr"
-version = "2.3.4"
+version = "2.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b16bd47d9e329435e309c58469fe0791c2d0d1ba96ec0954152a5ae2b04387dc"
+
+[[package]]
+name = "memmap"
+version = "0.6.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0ee1c47aaa256ecabcaea351eae4a9b01ef39ed810004e298d2511ed284b1525"
+checksum = "e2ffa2c986de11a9df78620c01eeaaf27d94d3ff02bf81bfcca953102dd0c6ff"
+dependencies = [
+ "libc",
+ "winapi 0.3.9",
+]
 
 [[package]]
 name = "memmap2"
-version = "0.2.1"
+version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "04e3e85b970d650e2ae6d70592474087051c11c54da7f7b4949725c5735fbcc6"
+checksum = "723e3ebdcdc5c023db1df315364573789f8857c11b631a2fdfad7c00f5c046b4"
 dependencies = [
  "libc",
 ]
@@ -3630,9 +3812,9 @@ dependencies = [
 
 [[package]]
 name = "memoffset"
-version = "0.6.2"
+version = "0.6.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cc14fc54a812b4472b4113facc3e44d099fbc0ea2ce0551fa5c703f8edfbfd38"
+checksum = "59accc507f1338036a0477ef61afdae33cde60840f4dfe481319ce3ad116ddf9"
 dependencies = [
  "autocfg",
 ]
@@ -3695,7 +3877,7 @@ dependencies = [
  "pallet-timestamp",
  "pallet-transaction-payment",
  "pallet-transaction-payment-rpc-runtime-api",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "serde",
  "sp-api",
  "sp-block-builder",
@@ -3716,6 +3898,10 @@ name = "metaversevm"
 version = "0.12.1"
 dependencies = [
  "array-bytes",
+ "ethash",
+ "ethash-rpc",
+ "ethereum-types 0.9.2",
+ "ethpow",
  "fc-db",
  "fc-mapping-sync",
  "fc-rpc",
@@ -3723,7 +3909,7 @@ dependencies = [
  "fp-rpc",
  "frame-benchmarking",
  "frame-benchmarking-cli",
- "futures 0.3.13",
+ "futures 0.3.15",
  "jsonrpc-core 15.1.0",
  "jsonrpc-pubsub 15.1.0",
  "log",
@@ -3731,11 +3917,14 @@ dependencies = [
  "pallet-ethereum",
  "pallet-evm",
  "pallet-transaction-payment-rpc",
+ "parity-scale-codec 2.1.3",
+ "parking_lot 0.11.1",
  "sc-basic-authorship",
  "sc-cli",
  "sc-client-api",
  "sc-consensus",
  "sc-consensus-aura",
+ "sc-consensus-pow",
  "sc-executor",
  "sc-finality-grandpa",
  "sc-keystore",
@@ -3754,6 +3943,7 @@ dependencies = [
  "sp-finality-grandpa",
  "sp-inherents",
  "sp-runtime",
+ "sp-timestamp",
  "sp-transaction-pool",
  "structopt",
  "substrate-build-script-utils",
@@ -3771,9 +3961,9 @@ dependencies = [
 
 [[package]]
 name = "minicbor-derive"
-version = "0.6.2"
+version = "0.6.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "19ce18b5423c573a13e80cb3046ea0af6379ef725dc3af4886bdb8f4e5093068"
+checksum = "7f2b9e8883d58e34b18facd16c4564a77ea50fce028ad3d0ee6753440e37acc8"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -3894,18 +4084,18 @@ dependencies = [
  "digest 0.9.0",
  "generic-array 0.14.4",
  "multihash-derive",
- "sha2 0.9.3",
+ "sha2 0.9.5",
  "sha3 0.9.1",
  "unsigned-varint 0.5.1",
 ]
 
 [[package]]
 name = "multihash-derive"
-version = "0.7.1"
+version = "0.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "85ee3c48cb9d9b275ad967a0e96715badc13c6029adb92f34fa17b9ff28fd81f"
+checksum = "424f6e86263cd5294cbd7f1e95746b95aca0e0d66bff31e5a40d6baa87b4aa99"
 dependencies = [
- "proc-macro-crate",
+ "proc-macro-crate 1.0.0",
  "proc-macro-error",
  "proc-macro2",
  "quote",
@@ -3926,48 +4116,64 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7d91ec0a2440aaff5f78ec35631a7027d50386c6163aa975f7caa0d5da4b6ff8"
 dependencies = [
  "bytes 1.0.1",
- "futures 0.3.13",
+ "futures 0.3.15",
  "log",
- "pin-project 1.0.6",
+ "pin-project 1.0.7",
  "smallvec 1.6.1",
  "unsigned-varint 0.7.0",
 ]
 
 [[package]]
 name = "nalgebra"
-version = "0.21.1"
+version = "0.26.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d6b6147c3d50b4f3cdabfe2ecc94a0191fd3d6ad58aefd9664cf396285883486"
+checksum = "476d1d59fe02fe54c86356e91650cd892f392782a1cb9fc524ec84f7aa9e1d06"
 dependencies = [
- "approx",
- "generic-array 0.13.3",
+ "approx 0.4.0",
  "matrixmultiply",
- "num-complex 0.2.4",
- "num-rational 0.2.4",
+ "num-complex 0.3.1",
+ "num-rational 0.3.2",
  "num-traits",
- "rand 0.7.3",
+ "rand 0.8.4",
  "rand_distr",
- "simba",
+ "simba 0.4.0",
  "typenum",
 ]
 
 [[package]]
-name = "names"
-version = "0.11.0"
+name = "nalgebra"
+version = "0.27.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ef320dab323286b50fb5cdda23f61c796a72a89998ab565ca32525c5c556f2da"
+checksum = "462fffe4002f4f2e1f6a9dcf12cc1a6fc0e15989014efc02a941d3e0f5dc2120"
 dependencies = [
- "rand 0.3.23",
+ "approx 0.5.0",
+ "matrixmultiply",
+ "nalgebra-macros",
+ "num-complex 0.4.0",
+ "num-rational 0.4.0",
+ "num-traits",
+ "simba 0.5.1",
+ "typenum",
 ]
 
 [[package]]
-name = "nb-connect"
-version = "1.1.0"
+name = "nalgebra-macros"
+version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a19900e7eee95eb2b3c2e26d12a874cc80aaf750e31be6fcbe743ead369fa45d"
+checksum = "01fcc0b8149b4632adc89ac3b7b31a12fb6099a0317a4eb2ebff574ef7de7218"
 dependencies = [
- "libc",
- "socket2 0.4.0",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "names"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ef320dab323286b50fb5cdda23f61c796a72a89998ab565ca32525c5c556f2da"
+dependencies = [
+ "rand 0.3.23",
 ]
 
 [[package]]
@@ -4041,19 +4247,18 @@ dependencies = [
 
 [[package]]
 name = "num-complex"
-version = "0.2.4"
+version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b6b19411a9719e753aff12e5187b74d60d3dc449ec3f4dc21e3989c3f554bc95"
+checksum = "747d632c0c558b87dbabbe6a82f3b4ae03720d0646ac5b7b4dae89394be5f2c5"
 dependencies = [
- "autocfg",
  "num-traits",
 ]
 
 [[package]]
 name = "num-complex"
-version = "0.3.1"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "747d632c0c558b87dbabbe6a82f3b4ae03720d0646ac5b7b4dae89394be5f2c5"
+checksum = "26873667bbbb7c5182d4a37c1add32cdf09f841af72da53318fdb81543c15085"
 dependencies = [
  "num-traits",
 ]
@@ -4093,12 +4298,23 @@ dependencies = [
 
 [[package]]
 name = "num-rational"
-version = "0.3.2"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "12ac428b1cb17fce6f731001d307d351ec70a6d202fc2e60f7d4c5e42d8f4f07"
+dependencies = [
+ "autocfg",
+ "num-bigint 0.3.2",
+ "num-integer",
+ "num-traits",
+]
+
+[[package]]
+name = "num-rational"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "12ac428b1cb17fce6f731001d307d351ec70a6d202fc2e60f7d4c5e42d8f4f07"
+checksum = "d41702bd167c2df5520b384281bc111a4b5efcf7fbc4c9c222c815b07e0a6a6a"
 dependencies = [
  "autocfg",
- "num-bigint 0.3.2",
  "num-integer",
  "num-traits",
 ]
@@ -4135,15 +4351,18 @@ dependencies = [
 
 [[package]]
 name = "object"
-version = "0.23.0"
+version = "0.25.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a9a7ab5d64814df0fe4a4b5ead45ed6c5f181ee3ff04ba344313a6c80446c5d4"
+checksum = "a38f2be3697a57b4060074ff41b44c16870d916ad7877c17696e063257482bc7"
+dependencies = [
+ "memchr",
+]
 
 [[package]]
 name = "once_cell"
-version = "1.7.2"
+version = "1.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "af8b08b04175473088b46763e51ee54da5f9a164bc162f615b91bc179dbf15a3"
+checksum = "692fcb63b64b1758029e0a96ee63e049ce8c5948587f2f7208df04625e5f6b56"
 dependencies = [
  "parking_lot 0.11.1",
 ]
@@ -4162,9 +4381,9 @@ checksum = "624a8340c38c1b80fd549087862da4ba43e08858af025b236e509b6649fc13d5"
 
 [[package]]
 name = "openssl-probe"
-version = "0.1.2"
+version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "77af24da69f9d9341038eba93a073b1fdaaa1b788221b00a69bce9e762cb32de"
+checksum = "28988d872ab76095a6e6ac88d99b54fd267702734fd7ffe610ca27f533ddb95a"
 
 [[package]]
 name = "owning_ref"
@@ -4185,7 +4404,7 @@ dependencies = [
  "frame-system",
  "pallet-session",
  "pallet-timestamp",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "serde",
  "sp-application-crypto",
  "sp-consensus-aura",
@@ -4203,7 +4422,7 @@ dependencies = [
  "frame-support",
  "frame-system",
  "impl-trait-for-tuples 0.2.1",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "sp-authorship",
  "sp-inherents",
  "sp-runtime",
@@ -4219,7 +4438,7 @@ dependencies = [
  "frame-benchmarking",
  "frame-support",
  "frame-system",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "serde",
  "sp-runtime",
  "sp-std 3.0.0",
@@ -4232,7 +4451,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "141af8771928ad054850f38dc4c23747b532254bdeeb1aeaf9288c7ad37241e0"
 dependencies = [
  "ethereum",
- "ethereum-types",
+ "ethereum-types 0.11.0",
  "evm",
  "fp-consensus",
  "fp-evm",
@@ -4244,9 +4463,9 @@ dependencies = [
  "pallet-balances",
  "pallet-evm",
  "pallet-timestamp",
- "parity-scale-codec",
- "rlp",
- "rustc-hex",
+ "parity-scale-codec 2.1.3",
+ "rlp 0.5.0",
+ "rustc-hex 2.1.0",
  "serde",
  "sha3 0.8.2",
  "sp-io",
@@ -4269,9 +4488,9 @@ dependencies = [
  "log",
  "pallet-balances",
  "pallet-timestamp",
- "parity-scale-codec",
- "primitive-types",
- "rlp",
+ "parity-scale-codec 2.1.3",
+ "primitive-types 0.9.0",
+ "rlp 0.5.0",
  "serde",
  "sha3 0.8.2",
  "sp-core",
@@ -4315,7 +4534,7 @@ dependencies = [
  "fp-evm",
  "frame-support",
  "pallet-evm",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "sp-core",
  "sp-io",
 ]
@@ -4370,7 +4589,7 @@ dependencies = [
  "frame-system",
  "pallet-authorship",
  "pallet-session",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "serde",
  "sp-application-crypto",
  "sp-core",
@@ -4389,7 +4608,7 @@ checksum = "ca3ea6fa9aa36735ec11d7ec4d97dd6472650c0656fdc6d4adaca2578bd71134"
 dependencies = [
  "frame-support",
  "frame-system",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "safe-mix",
  "sp-runtime",
  "sp-std 3.0.0",
@@ -4405,7 +4624,7 @@ dependencies = [
  "frame-system",
  "impl-trait-for-tuples 0.2.1",
  "pallet-timestamp",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "serde",
  "sp-core",
  "sp-io",
@@ -4424,7 +4643,7 @@ checksum = "c4a96774302e3824b7924c2465935ca4d558ea5f6a762c043fbc45fd2646ce89"
 dependencies = [
  "frame-support",
  "frame-system",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "serde",
  "sp-io",
  "sp-runtime",
@@ -4438,7 +4657,7 @@ dependencies = [
  "frame-benchmarking",
  "frame-support",
  "frame-system",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "serde",
  "sp-core",
  "sp-io",
@@ -4456,7 +4675,7 @@ dependencies = [
  "frame-support",
  "frame-system",
  "impl-trait-for-tuples 0.2.1",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "serde",
  "sp-inherents",
  "sp-io",
@@ -4473,7 +4692,7 @@ checksum = "48e10dc1a10dd3f52edb20d3885cf5b2b16f26273a4d93e61331c6691fb13ab3"
 dependencies = [
  "frame-support",
  "frame-system",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "serde",
  "smallvec 1.6.1",
  "sp-core",
@@ -4492,7 +4711,7 @@ dependencies = [
  "jsonrpc-core-client 15.1.0",
  "jsonrpc-derive 15.1.0",
  "pallet-transaction-payment-rpc-runtime-api",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "sp-api",
  "sp-blockchain",
  "sp-core",
@@ -4507,16 +4726,16 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7a92d3383260d0d19d9a36f40766d48d779fd19baccba8b20c3e7d2670a26ee1"
 dependencies = [
  "pallet-transaction-payment",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "sp-api",
  "sp-runtime",
 ]
 
 [[package]]
 name = "parity-db"
-version = "0.2.3"
+version = "0.2.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "495197c078e54b8735181aa35c00a327f7f3a3cc00a1ee8c95926dd010f0ec6b"
+checksum = "2e337f62db341435f0da05b8f6b97e984ef4ea5800510cd07c2d624688c40b47"
 dependencies = [
  "blake2-rfc",
  "crc32fast",
@@ -4526,7 +4745,7 @@ dependencies = [
  "log",
  "memmap2",
  "parking_lot 0.11.1",
- "rand 0.8.3",
+ "rand 0.8.4",
 ]
 
 [[package]]
@@ -4544,29 +4763,41 @@ dependencies = [
  "serde",
  "static_assertions",
  "unsigned-varint 0.7.0",
- "url 2.2.1",
+ "url 2.2.2",
 ]
 
 [[package]]
 name = "parity-scale-codec"
-version = "2.0.1"
+version = "1.3.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0cd3dab59b5cf4bc81069ade0fc470341a1ef3ad5fa73e5a8943bed2ec12b2e8"
+checksum = "a4b26b16c7687c3075982af47719e481815df30bc544f7a6690763a25ca16e9d"
 dependencies = [
  "arrayvec 0.5.2",
- "bitvec",
- "byte-slice-cast",
+ "bitvec 0.17.4",
+ "byte-slice-cast 0.3.5",
+ "serde",
+]
+
+[[package]]
+name = "parity-scale-codec"
+version = "2.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b310f220c335f9df1b3d2e9fbe3890bbfeef5030dad771620f48c5c229877cd3"
+dependencies = [
+ "arrayvec 0.7.1",
+ "bitvec 0.20.4",
+ "byte-slice-cast 1.0.0",
  "parity-scale-codec-derive",
  "serde",
 ]
 
 [[package]]
 name = "parity-scale-codec-derive"
-version = "2.0.1"
+version = "2.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fa04976a81fde04924b40cc4036c4d12841e8bb04325a5cf2ada75731a150a7d"
+checksum = "81038e13ca2c32587201d544ea2e6b6c47120f1e4eae04478f9f60b6bcb89145"
 dependencies = [
- "proc-macro-crate",
+ "proc-macro-crate 1.0.0",
  "proc-macro2",
  "quote",
  "syn",
@@ -4608,7 +4839,7 @@ dependencies = [
  "impl-trait-for-tuples 0.2.1",
  "parity-util-mem-derive",
  "parking_lot 0.11.1",
- "primitive-types",
+ "primitive-types 0.9.0",
  "smallvec 1.6.1",
  "winapi 0.3.9",
 ]
@@ -4654,7 +4885,7 @@ dependencies = [
  "rand 0.7.3",
  "sha-1 0.8.2",
  "slab",
- "url 2.2.1",
+ "url 2.2.2",
 ]
 
 [[package]]
@@ -4691,7 +4922,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6d7744ac029df22dca6284efe4e898991d28e3085c706c972bcd7da4a27a15eb"
 dependencies = [
  "instant",
- "lock_api 0.4.2",
+ "lock_api 0.4.4",
  "parking_lot_core 0.8.3",
 ]
 
@@ -4733,36 +4964,17 @@ dependencies = [
  "cfg-if 1.0.0",
  "instant",
  "libc",
- "redox_syscall 0.2.5",
+ "redox_syscall 0.2.9",
  "smallvec 1.6.1",
  "winapi 0.3.9",
 ]
 
-[[package]]
-name = "paste"
-version = "0.1.18"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "45ca20c77d80be666aef2b45486da86238fabe33e38306bd3118fe4af33fa880"
-dependencies = [
- "paste-impl",
- "proc-macro-hack",
-]
-
 [[package]]
 name = "paste"
 version = "1.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "acbf547ad0c65e31259204bd90935776d1c693cec2f4ff7abb7a1bbbd40dfe58"
 
-[[package]]
-name = "paste-impl"
-version = "0.1.18"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d95a7db200b97ef370c8e6de0088252f7e0dfff7d047a28528e47456c0fc98b6"
-dependencies = [
- "proc-macro-hack",
-]
-
 [[package]]
 name = "pbkdf2"
 version = "0.3.0"
@@ -4861,27 +5073,27 @@ dependencies = [
 
 [[package]]
 name = "pin-project"
-version = "0.4.27"
+version = "0.4.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2ffbc8e94b38ea3d2d8ba92aea2983b503cd75d0888d75b86bb37970b5698e15"
+checksum = "918192b5c59119d51e0cd221f4d49dde9112824ba717369e903c97d076083d0f"
 dependencies = [
- "pin-project-internal 0.4.27",
+ "pin-project-internal 0.4.28",
 ]
 
 [[package]]
 name = "pin-project"
-version = "1.0.6"
+version = "1.0.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bc174859768806e91ae575187ada95c91a29e96a98dc5d2cd9a1fed039501ba6"
+checksum = "c7509cc106041c40a4518d2af7a61530e1eed0e6285296a3d8c5472806ccc4a4"
 dependencies = [
- "pin-project-internal 1.0.6",
+ "pin-project-internal 1.0.7",
 ]
 
 [[package]]
 name = "pin-project-internal"
-version = "0.4.27"
+version = "0.4.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "65ad2ae56b6abe3a1ee25f15ee605bacadb9a764edaba9c2bf4103800d4a1895"
+checksum = "3be26700300be6d9d23264c73211d8190e755b6b5ca7a1b28230025511b52a5e"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -4890,9 +5102,9 @@ dependencies = [
 
 [[package]]
 name = "pin-project-internal"
-version = "1.0.6"
+version = "1.0.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a490329918e856ed1b083f244e3bfe2d8c4f336407e4ea9e1a9f479ff09049e5"
+checksum = "48c950132583b500556b1efd71d45b319029f2b71518d979fcc208e16b42426f"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -4931,14 +5143,14 @@ checksum = "989d43012e2ca1c4a02507c67282691a0a3207f9dc67cec596b43fe925b3d325"
 
 [[package]]
 name = "polling"
-version = "2.0.3"
+version = "2.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4fc12d774e799ee9ebae13f4076ca003b40d18a11ac0f3641e6f899618580b7b"
+checksum = "92341d779fa34ea8437ef4d82d440d5e1ce3f3ff7f824aa64424cd481f9a1f25"
 dependencies = [
  "cfg-if 1.0.0",
  "libc",
  "log",
- "wepoll-sys",
+ "wepoll-ffi",
  "winapi 0.3.9",
 ]
 
@@ -4948,7 +5160,7 @@ version = "0.6.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4b7456bc1ad2d4cf82b3a016be4c2ac48daf11bf990c1603ebd447fe6f30fca8"
 dependencies = [
- "cpuid-bool 0.2.0",
+ "cpuid-bool",
  "universal-hash",
 ]
 
@@ -4958,7 +5170,7 @@ version = "0.4.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "eebcc4aa140b9abd2bc40d9c3f7ccec842679cd79045ac3a7ac698c1a064b7cd"
 dependencies = [
- "cpuid-bool 0.2.0",
+ "cpuid-bool",
  "opaque-debug 0.3.0",
  "universal-hash",
 ]
@@ -4969,17 +5181,77 @@ version = "0.2.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ac74c624d6b2d21f425f752262f42188365d7b8ff1aff74c82e45136510a4857"
 
+[[package]]
+name = "primal"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0e31b86efadeaeb1235452171a66689682783149a6249ff334a2c5d8218d00a4"
+dependencies = [
+ "primal-check",
+ "primal-estimate",
+ "primal-sieve",
+]
+
+[[package]]
+name = "primal-bit"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "686a64e2f50194c64942992af5799e6b6e8775b8f88c607d72ed0a2fd58b9b21"
+dependencies = [
+ "hamming",
+]
+
+[[package]]
+name = "primal-check"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8e65f96c0a171f887198c274392c99a116ef65aa7f53f3b6d4902f493965c2d1"
+dependencies = [
+ "num-integer",
+]
+
+[[package]]
+name = "primal-estimate"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "56ea4531dde757b56906493c8604641da14607bf9cdaa80fb9c9cabd2429f8d5"
+
+[[package]]
+name = "primal-sieve"
+version = "0.2.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "da2d6ed369bb4b0273aeeb43f07c105c0117717cbae827b20719438eb2eb798c"
+dependencies = [
+ "hamming",
+ "primal-bit",
+ "primal-estimate",
+ "smallvec 0.6.14",
+]
+
+[[package]]
+name = "primitive-types"
+version = "0.7.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7dd39dcacf71411ba488570da7bbc89b717225e46478b30ba99b92db6b149809"
+dependencies = [
+ "fixed-hash 0.6.1",
+ "impl-codec 0.4.2",
+ "impl-rlp 0.2.1",
+ "impl-serde",
+ "uint 0.8.5",
+]
+
 [[package]]
 name = "primitive-types"
 version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2415937401cb030a2a0a4d922483f945fa068f52a7dbb22ce0fe5f2b6f6adace"
 dependencies = [
- "fixed-hash",
- "impl-codec",
- "impl-rlp",
+ "fixed-hash 0.7.0",
+ "impl-codec 0.5.0",
+ "impl-rlp 0.3.0",
  "impl-serde",
- "uint",
+ "uint 0.9.0",
 ]
 
 [[package]]
@@ -4991,6 +5263,16 @@ dependencies = [
  "toml",
 ]
 
+[[package]]
+name = "proc-macro-crate"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "41fdbd1df62156fbc5945f4762632564d7d038153091c3fcf1067f6aef7cff92"
+dependencies = [
+ "thiserror",
+ "toml",
+]
+
 [[package]]
 name = "proc-macro-error"
 version = "1.0.4"
@@ -5029,9 +5311,9 @@ checksum = "bc881b2c22681370c6a780e47af9840ef841837bc98118431d4e1868bd0c1086"
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.24"
+version = "1.0.27"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1e0704ee1a7e00d7bb417d0770ea303c1bccbabf0ef1667dae92b5967f5f8a71"
+checksum = "f0d8caf72986c1a598726adc988bb5984792ef84f5ee5aa50209145ee8077038"
 dependencies = [
  "unicode-xid",
 ]
@@ -5075,7 +5357,7 @@ dependencies = [
  "prost",
  "prost-types",
  "tempfile",
- "which 4.0.2",
+ "which",
 ]
 
 [[package]]
@@ -5103,9 +5385,9 @@ dependencies = [
 
 [[package]]
 name = "psm"
-version = "0.1.12"
+version = "0.1.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3abf49e5417290756acfd26501536358560c4a5cc4a0934d390939acb3e7083a"
+checksum = "21ff0279b4a85e576b97e4a21d13e437ebcd56612706cde5d3f0d5c9399490c0"
 dependencies = [
  "cc",
 ]
@@ -5129,9 +5411,9 @@ checksum = "a1d01941d82fa2ab50be1e79e6714289dd7cde78eba4c074bc5a4374f650dfe0"
 
 [[package]]
 name = "quick-error"
-version = "2.0.0"
+version = "2.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3ac73b1112776fc109b2e61909bc46c7e1bf0d7f690ffb1676553acce16d5cda"
+checksum = "a993555f31e5a609f617c12db6250dedcac1b0a85076912c436e6fc9b2c8e6a3"
 
 [[package]]
 name = "quicksink"
@@ -5153,6 +5435,12 @@ dependencies = [
  "proc-macro2",
 ]
 
+[[package]]
+name = "radium"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "def50a86306165861203e7f84ecffbbdfdea79f0e51039b33de1e952358c47ac"
+
 [[package]]
 name = "radium"
 version = "0.6.2"
@@ -5207,14 +5495,14 @@ dependencies = [
 
 [[package]]
 name = "rand"
-version = "0.8.3"
+version = "0.8.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0ef9e7e66b4468674bfcb0c81af8b7fa0bb154fa9f28eb840da5c447baeb8d7e"
+checksum = "2e7573632e6454cf6b99d7aac4ccca54be06da05aca2ef7423d22d27d4d4bcd8"
 dependencies = [
  "libc",
- "rand_chacha 0.3.0",
- "rand_core 0.6.2",
- "rand_hc 0.3.0",
+ "rand_chacha 0.3.1",
+ "rand_core 0.6.3",
+ "rand_hc 0.3.1",
 ]
 
 [[package]]
@@ -5229,12 +5517,12 @@ dependencies = [
 
 [[package]]
 name = "rand_chacha"
-version = "0.3.0"
+version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e12735cf05c9e10bf21534da50a147b924d555dc7a547c42e6bb2d5b6017ae0d"
+checksum = "e6c10a63a0fa32252be49d21e7709d4d4baf8d231c2dbce1eaa8141b9b127d88"
 dependencies = [
  "ppv-lite86",
- "rand_core 0.6.2",
+ "rand_core 0.6.3",
 ]
 
 [[package]]
@@ -5263,20 +5551,21 @@ dependencies = [
 
 [[package]]
 name = "rand_core"
-version = "0.6.2"
+version = "0.6.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "34cf66eb183df1c5876e2dcf6b13d57340741e8dc255b48e40a26de954d06ae7"
+checksum = "d34f1408f55294453790c48b2f1ebbb1c5b4b7563eb1f418bcfcfdbb06ebb4e7"
 dependencies = [
- "getrandom 0.2.2",
+ "getrandom 0.2.3",
 ]
 
 [[package]]
 name = "rand_distr"
-version = "0.2.2"
+version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "96977acbdd3a6576fb1d27391900035bf3863d4a16422973a409b488cf29ffb2"
+checksum = "051b398806e42b9cd04ad9ec8f81e355d0a382c543ac6672c62f5a5b452ef142"
 dependencies = [
- "rand 0.7.3",
+ "num-traits",
+ "rand 0.8.4",
 ]
 
 [[package]]
@@ -5290,11 +5579,11 @@ dependencies = [
 
 [[package]]
 name = "rand_hc"
-version = "0.3.0"
+version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3190ef7066a446f2e7f42e239d161e905420ccab01eb967c9eb27d21b2322a73"
+checksum = "d51e9f596de227fda2ea6c84607f5558e196eeaf43c986b724ba4fb8fdf497e7"
 dependencies = [
- "rand_core 0.6.2",
+ "rand_core 0.6.3",
 ]
 
 [[package]]
@@ -5325,9 +5614,9 @@ checksum = "60a357793950651c4ed0f3f52338f53b2f809f32d83a07f72909fa13e4c6c1e3"
 
 [[package]]
 name = "rayon"
-version = "1.5.0"
+version = "1.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8b0d8e0819fadc20c74ea8373106ead0600e3a67ef1fe8da56e39b9ae7275674"
+checksum = "c06aca804d41dbc8ba42dfd964f0d01334eceb64314b9ecf7c5fad5188a06d90"
 dependencies = [
  "autocfg",
  "crossbeam-deque 0.8.0",
@@ -5337,13 +5626,13 @@ dependencies = [
 
 [[package]]
 name = "rayon-core"
-version = "1.9.0"
+version = "1.9.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9ab346ac5921dc62ffa9f89b7a773907511cdfa5490c572ae9be1be33e8afa4a"
+checksum = "d78120e2c850279833f1dd3582f730c4ab53ed95aeaaaa862a2a5c71b1656d8e"
 dependencies = [
  "crossbeam-channel",
  "crossbeam-deque 0.8.0",
- "crossbeam-utils 0.8.3",
+ "crossbeam-utils 0.8.5",
  "lazy_static",
  "num_cpus",
 ]
@@ -5365,32 +5654,21 @@ checksum = "41cc0f7e4d5d4544e8861606a285bb08d3e70712ccc7d2b84d7c0ccfaf4b05ce"
 
 [[package]]
 name = "redox_syscall"
-version = "0.2.5"
+version = "0.2.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "94341e4e44e24f6b591b59e47a8a027df12e008d73fd5672dbea9cc22f4507d9"
+checksum = "5ab49abadf3f9e1c4bc499e8845e152ad87d2ad2d30371841171169e9d75feee"
 dependencies = [
  "bitflags",
 ]
 
-[[package]]
-name = "redox_users"
-version = "0.3.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "de0737333e7a9502c789a36d7c7fa6092a49895d4faa31ca5df163857ded2e9d"
-dependencies = [
- "getrandom 0.1.16",
- "redox_syscall 0.1.57",
- "rust-argon2",
-]
-
 [[package]]
 name = "redox_users"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "528532f3d801c87aec9def2add9ca802fe569e44a544afe633765267840abe64"
 dependencies = [
- "getrandom 0.2.2",
- "redox_syscall 0.2.5",
+ "getrandom 0.2.3",
+ "redox_syscall 0.2.9",
 ]
 
 [[package]]
@@ -5426,9 +5704,9 @@ dependencies = [
 
 [[package]]
 name = "regex"
-version = "1.4.5"
+version = "1.5.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "957056ecddbeba1b26965114e191d2e8589ce74db242b6ea25fc4062427a5c19"
+checksum = "d07a8629359eb56f1e2fb1652bb04212c072a87ba68546a04065d525673ac461"
 dependencies = [
  "aho-corasick",
  "memchr",
@@ -5437,19 +5715,18 @@ dependencies = [
 
 [[package]]
 name = "regex-automata"
-version = "0.1.9"
+version = "0.1.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ae1ded71d66a4a97f5e961fd0cb25a5f366a42a41570d16a763a69c092c26ae4"
+checksum = "6c230d73fb8d8c1b9c0b3135c5142a8acee3a0558fb8db5cf1cb65f8d7862132"
 dependencies = [
- "byteorder",
  "regex-syntax",
 ]
 
 [[package]]
 name = "regex-syntax"
-version = "0.6.23"
+version = "0.6.25"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "24d5f089152e60f62d28b835fbff2cd2e8dc0baf1ac13343bef92ab7eed84548"
+checksum = "f497285884f3fcff424ffc933e56d7cbca511def0c9831a7f9b5f6153e3cc89b"
 
 [[package]]
 name = "region"
@@ -5474,9 +5751,9 @@ dependencies = [
 
 [[package]]
 name = "retain_mut"
-version = "0.1.2"
+version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "53552c6c49e1e13f1a203ef0080ab3bbef0beb570a528993e83df057a9d9bba1"
+checksum = "e9c17925a9027d298a4603d286befe3f9dc0e8ed02523141914eb628798d6e5b"
 
 [[package]]
 name = "ring"
@@ -5493,6 +5770,15 @@ dependencies = [
  "winapi 0.3.9",
 ]
 
+[[package]]
+name = "rlp"
+version = "0.4.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1190dcc8c3a512f1eef5d09bb8c84c7f39e1054e174d1795482e18f5272f2e73"
+dependencies = [
+ "rustc-hex 2.1.0",
+]
+
 [[package]]
 name = "rlp"
 version = "0.5.0"
@@ -5500,7 +5786,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e54369147e3e7796c9b885c7304db87ca3d09a0a98f72843d532868675bbfba8"
 dependencies = [
  "bytes 1.0.1",
- "rustc-hex",
+ "rustc-hex 2.1.0",
 ]
 
 [[package]]
@@ -5516,9 +5802,9 @@ dependencies = [
 
 [[package]]
 name = "rocksdb"
-version = "0.15.0"
+version = "0.16.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "23d83c02c429044d58474eaf5ae31e062d0de894e21125b47437ec0edc1397e6"
+checksum = "c749134fda8bfc90d0de643d59bfc841dcb3ac8a1062e12b6754bd60235c48b3"
 dependencies = [
  "libc",
  "librocksdb-sys",
@@ -5534,23 +5820,11 @@ dependencies = [
  "winapi 0.3.9",
 ]
 
-[[package]]
-name = "rust-argon2"
-version = "0.8.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4b18820d944b33caa75a71378964ac46f58517c92b6ae5f762636247c09e78fb"
-dependencies = [
- "base64 0.13.0",
- "blake2b_simd",
- "constant_time_eq",
- "crossbeam-utils 0.8.3",
-]
-
 [[package]]
 name = "rustc-demangle"
-version = "0.1.18"
+version = "0.1.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6e3bad0ee36814ca07d7968269dd4b7ec89ec2da10c4bb613928d3077083c232"
+checksum = "410f7acf3cb3a44527c5d9546bad4bf4e6c460915d5f9f2fc524498bfe8f70ce"
 
 [[package]]
 name = "rustc-hash"
@@ -5558,6 +5832,12 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "08d43f7aa6b08d49f382cde6a7982047c3426db949b1424bc4b7ec9ae12c6ce2"
 
+[[package]]
+name = "rustc-hex"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0ceb8ce7a5e520de349e1fa172baeba4a9e8d5ef06c47471863530bc4972ee1e"
+
 [[package]]
 name = "rustc-hex"
 version = "2.1.0"
@@ -5588,9 +5868,9 @@ dependencies = [
 
 [[package]]
 name = "rustls"
-version = "0.19.0"
+version = "0.19.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "064fd21ff87c6e87ed4506e68beb42459caa4a0e2eb144932e6776768556980b"
+checksum = "35edb675feee39aec9c99fa5ff985081995a06d594114ae14cbe797ad7b7a6d7"
 dependencies = [
  "base64 0.13.0",
  "log",
@@ -5617,8 +5897,8 @@ version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4da5fcb054c46f5a5dff833b129285a93d3f0179531735e6c866e8cc307d2020"
 dependencies = [
- "futures 0.3.13",
- "pin-project 0.4.27",
+ "futures 0.3.15",
+ "pin-project 0.4.28",
  "static_assertions",
 ]
 
@@ -5661,10 +5941,10 @@ version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "de86afb63617599821312bda08882451ff2b49d9c45e22513ddff5a07c6d966e"
 dependencies = [
- "futures 0.3.13",
+ "futures 0.3.15",
  "futures-timer 3.0.2",
  "log",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "sc-block-builder",
  "sc-client-api",
  "sc-proposer-metrics",
@@ -5685,7 +5965,7 @@ version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9862161f9d09d870401c7256c89ad1eb3afa56a61f7d7135c2bac76ff7152955"
 dependencies = [
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "sc-client-api",
  "sp-api",
  "sp-block-builder",
@@ -5704,7 +5984,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "50d97030776b49bc9c109e2d349212d8f2500637761048e1af5b7ce2dfd994c7"
 dependencies = [
  "impl-trait-for-tuples 0.2.1",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "sc-chain-spec-derive",
  "sc-consensus-babe",
  "sc-consensus-epochs",
@@ -5725,7 +6005,7 @@ version = "3.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5f14985513db9798fcedea58bdc8a08f1c6b3a515d6546ced7467b059b7982c4"
 dependencies = [
- "proc-macro-crate",
+ "proc-macro-crate 0.1.5",
  "proc-macro2",
  "quote",
  "syn",
@@ -5739,12 +6019,12 @@ checksum = "7ec1647b5c1483fa05f7f32e436d0e378e2f3d5696a5a30bddf66f5faf28acb4"
 dependencies = [
  "chrono",
  "fdlimit",
- "futures 0.3.13",
+ "futures 0.3.15",
  "hex",
  "libp2p",
  "log",
  "names",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "rand 0.7.3",
  "regex",
  "rpassword",
@@ -5778,12 +6058,12 @@ checksum = "56d8b2c8dc0cee9ac56e87ad50c980edbdeb35bdd5b5d9da4ae90567423363be"
 dependencies = [
  "derive_more",
  "fnv",
- "futures 0.3.13",
+ "futures 0.3.15",
  "hash-db",
  "kvdb",
  "lazy_static",
  "log",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "parking_lot 0.11.1",
  "sc-executor",
  "sp-api",
@@ -5819,7 +6099,7 @@ dependencies = [
  "linked-hash-map",
  "log",
  "parity-db",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "parity-util-mem",
  "parking_lot 0.11.1",
  "sc-client-api",
@@ -5855,10 +6135,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8e0d32ccddef567a0fe373729aa4da51b2d437cbb102b9810400c9e77e040c1d"
 dependencies = [
  "derive_more",
- "futures 0.3.13",
+ "futures 0.3.15",
  "futures-timer 3.0.2",
  "log",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "parking_lot 0.11.1",
  "sc-block-builder",
  "sc-client-api",
@@ -5889,14 +6169,14 @@ checksum = "98d52048476e0fcb53feae8ca919a602104f1ba0b89a729b496440f36b332961"
 dependencies = [
  "derive_more",
  "fork-tree",
- "futures 0.3.13",
+ "futures 0.3.15",
  "futures-timer 3.0.2",
  "log",
  "merlin",
  "num-bigint 0.2.6",
  "num-rational 0.2.4",
  "num-traits",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "parking_lot 0.11.1",
  "pdqselect",
  "rand 0.7.3",
@@ -5935,11 +6215,34 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "326313ffb249a526e8ee8e08af9fdf0c4459cebeaa760b934e9df3985b68e4df"
 dependencies = [
  "fork-tree",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
+ "parking_lot 0.11.1",
+ "sc-client-api",
+ "sp-blockchain",
+ "sp-runtime",
+]
+
+[[package]]
+name = "sc-consensus-pow"
+version = "0.9.0"
+dependencies = [
+ "derive_more",
+ "futures 0.3.15",
+ "futures-timer 3.0.2",
+ "log",
+ "parity-scale-codec 2.1.3",
  "parking_lot 0.11.1",
  "sc-client-api",
+ "sp-api",
+ "sp-block-builder",
  "sp-blockchain",
+ "sp-consensus",
+ "sp-consensus-pow",
+ "sp-core",
+ "sp-inherents",
  "sp-runtime",
+ "sp-timestamp",
+ "substrate-prometheus-endpoint",
 ]
 
 [[package]]
@@ -5948,10 +6251,10 @@ version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "76e09ff8b680d449102da9717a70c3bbbbb981fd4cf1bfbafc1739d954eb0898"
 dependencies = [
- "futures 0.3.13",
+ "futures 0.3.15",
  "futures-timer 3.0.2",
  "log",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "parking_lot 0.11.1",
  "sc-client-api",
  "sc-telemetry",
@@ -5994,7 +6297,7 @@ dependencies = [
  "lazy_static",
  "libsecp256k1",
  "log",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "parity-wasm 0.41.0",
  "parking_lot 0.11.1",
  "sc-executor-common",
@@ -6021,7 +6324,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "87004102a8e95f432f1c624c7fa7fb0edc5995db2e0fcbabbb697f1955e7c1d2"
 dependencies = [
  "derive_more",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "parity-wasm 0.41.0",
  "sp-allocator",
  "sp-core",
@@ -6038,7 +6341,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2d3d7b6db2df5f2c24848883a855a8276363f00cef5b49744974f7e1203bf274"
 dependencies = [
  "log",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "sc-executor-common",
  "sp-allocator",
  "sp-core",
@@ -6054,7 +6357,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "24673c981fad2dff4398a09a1086579e2774f18d81639fa2bd9cb215e6dd9e36"
 dependencies = [
  "log",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "parity-wasm 0.41.0",
  "pwasm-utils",
  "sc-executor-common",
@@ -6075,13 +6378,13 @@ dependencies = [
  "derive_more",
  "finality-grandpa",
  "fork-tree",
- "futures 0.3.13",
+ "futures 0.3.15",
  "futures-timer 3.0.2",
  "linked-hash-map",
  "log",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "parking_lot 0.11.1",
- "pin-project 1.0.6",
+ "pin-project 1.0.7",
  "rand 0.7.3",
  "sc-block-builder",
  "sc-client-api",
@@ -6112,7 +6415,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4f4c8994853e1158dc4f448b014aa83eef56ced214ec0af316eecf4a6ca3268f"
 dependencies = [
  "ansi_term 0.12.1",
- "futures 0.3.13",
+ "futures 0.3.15",
  "log",
  "parity-util-mem",
  "sc-client-api",
@@ -6132,7 +6435,7 @@ checksum = "d966ed36c404eced656bd63aad8a30d2c1a14633f07cd1d7d9c11b62f75a7905"
 dependencies = [
  "async-trait",
  "derive_more",
- "futures 0.3.13",
+ "futures 0.3.15",
  "futures-util",
  "hex",
  "merlin",
@@ -6153,7 +6456,7 @@ checksum = "04e8dbcb2951f7cf76ddf97ed26dcef0dab79d76745de4a8f169d58236ea8704"
 dependencies = [
  "hash-db",
  "lazy_static",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "parking_lot 0.11.1",
  "sc-client-api",
  "sc-executor",
@@ -6183,7 +6486,7 @@ dependencies = [
  "erased-serde",
  "fnv",
  "fork-tree",
- "futures 0.3.13",
+ "futures 0.3.15",
  "futures-timer 3.0.2",
  "hex",
  "ip_network",
@@ -6193,9 +6496,9 @@ dependencies = [
  "log",
  "lru",
  "nohash-hasher",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "parking_lot 0.11.1",
- "pin-project 1.0.6",
+ "pin-project 1.0.7",
  "prost",
  "prost-build",
  "rand 0.7.3",
@@ -6225,7 +6528,7 @@ version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e2cd5487d6f8051863a186e2aea4c233a07bb691780d3b117c9d6ffe1ff9a8fe"
 dependencies = [
- "futures 0.3.13",
+ "futures 0.3.15",
  "futures-timer 3.0.2",
  "libp2p",
  "log",
@@ -6244,13 +6547,13 @@ checksum = "7bc91fc71c128748a3393cb3421e12a7759ccffcc1cc4a9e6ff4ead6cc68ba48"
 dependencies = [
  "bytes 0.5.6",
  "fnv",
- "futures 0.3.13",
+ "futures 0.3.15",
  "futures-timer 3.0.2",
  "hyper 0.13.10",
  "hyper-rustls",
  "log",
  "num_cpus",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "parking_lot 0.11.1",
  "rand 0.7.3",
  "sc-client-api",
@@ -6270,7 +6573,7 @@ version = "3.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ce454e528e7797a239e734d0d66bf904d48be47aa92691ac7546a45ec32a64cf"
 dependencies = [
- "futures 0.3.13",
+ "futures 0.3.15",
  "libp2p",
  "log",
  "serde_json",
@@ -6294,12 +6597,12 @@ version = "3.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "750397c6aa5a4f922cac99599ad74a4082e3e87553d51ceb4c48abfa056ff32c"
 dependencies = [
- "futures 0.3.13",
+ "futures 0.3.15",
  "hash-db",
  "jsonrpc-core 15.1.0",
  "jsonrpc-pubsub 15.1.0",
  "log",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "parking_lot 0.11.1",
  "sc-block-builder",
  "sc-client-api",
@@ -6330,13 +6633,13 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dc8393410297df2885efec20d0629a9833b4fd9e4ad83a92471e1ea0c11a0a54"
 dependencies = [
  "derive_more",
- "futures 0.3.13",
+ "futures 0.3.15",
  "jsonrpc-core 15.1.0",
  "jsonrpc-core-client 15.1.0",
  "jsonrpc-derive 15.1.0",
  "jsonrpc-pubsub 15.1.0",
  "log",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "parking_lot 0.11.1",
  "serde",
  "serde_json",
@@ -6376,17 +6679,17 @@ dependencies = [
  "directories",
  "exit-future",
  "futures 0.1.31",
- "futures 0.3.13",
+ "futures 0.3.15",
  "futures-timer 3.0.2",
  "hash-db",
  "jsonrpc-core 15.1.0",
  "jsonrpc-pubsub 15.1.0",
  "lazy_static",
  "log",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "parity-util-mem",
  "parking_lot 0.11.1",
- "pin-project 1.0.6",
+ "pin-project 1.0.7",
  "rand 0.7.3",
  "sc-block-builder",
  "sc-chain-spec",
@@ -6438,7 +6741,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8f144043d5860ce133f701fa78679d6278f2dfc698686beb5f6d892c267e9d92"
 dependencies = [
  "log",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "parity-util-mem",
  "parity-util-mem-derive",
  "parking_lot 0.11.1",
@@ -6454,11 +6757,11 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d05040c594b331d90d7341e82c6dc6a3eb7bb2afb4e5dc9c36a79a6754166057"
 dependencies = [
  "chrono",
- "futures 0.3.13",
+ "futures 0.3.15",
  "libp2p",
  "log",
  "parking_lot 0.11.1",
- "pin-project 1.0.6",
+ "pin-project 1.0.7",
  "rand 0.7.3",
  "serde",
  "serde_json",
@@ -6505,7 +6808,7 @@ version = "3.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ec18b0506911e6d624d9ea8f8cc5f503e7944a0fe7d37de95ee84033cf160ebc"
 dependencies = [
- "proc-macro-crate",
+ "proc-macro-crate 0.1.5",
  "proc-macro2",
  "quote",
  "syn",
@@ -6518,7 +6821,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "87b385b8f66cce185478c500ad3de8f4775ab0e948c31561aeac78a27bedc654"
 dependencies = [
  "derive_more",
- "futures 0.3.13",
+ "futures 0.3.15",
  "linked-hash-map",
  "log",
  "parity-util-mem",
@@ -6540,11 +6843,11 @@ version = "3.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "09f4331ea8da2ff45a9466637f90f5cc89f9d31fcd1cd20f74f2520b33bff069"
 dependencies = [
- "futures 0.3.13",
+ "futures 0.3.15",
  "futures-diagnose",
  "intervalier",
  "log",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "parity-util-mem",
  "parking_lot 0.11.1",
  "sc-client-api",
@@ -6624,9 +6927,9 @@ dependencies = [
 
 [[package]]
 name = "sct"
-version = "0.6.0"
+version = "0.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e3042af939fca8c3453b7af0f1c66e533a15a86169e39de2657310ade8f98d3c"
+checksum = "b362b83898e0e69f38515b82ee15aa80636befe47c3b6d3d89a911e78fc228ce"
 dependencies = [
  "ring",
  "untrusted",
@@ -6709,18 +7012,18 @@ dependencies = [
 
 [[package]]
 name = "serde"
-version = "1.0.125"
+version = "1.0.126"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "558dc50e1a5a5fa7112ca2ce4effcb321b0300c0d4ccf0776a9f60cd89031171"
+checksum = "ec7505abeacaec74ae4778d9d9328fe5a5d04253220a85c4ee022239fc996d03"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.125"
+version = "1.0.126"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b093b7a2bb58203b5da3056c05b4ec1fed827dcfdb37347a8841695263b3d06d"
+checksum = "963a7dbc9895aeac7ac90e74f34a5d5261828f79df35cbed41e10189d3804d43"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -6752,13 +7055,13 @@ dependencies = [
 
 [[package]]
 name = "sha-1"
-version = "0.9.4"
+version = "0.9.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dfebf75d25bd900fd1e7d11501efab59bc846dbc76196839663e6637bba9f25f"
+checksum = "8c4cfa741c5832d0ef7fab46cabed29c2aae926db0b11bb2069edd8db5e64e16"
 dependencies = [
  "block-buffer 0.9.0",
  "cfg-if 1.0.0",
- "cpuid-bool 0.1.2",
+ "cpufeatures",
  "digest 0.9.0",
  "opaque-debug 0.3.0",
 ]
@@ -6777,13 +7080,13 @@ dependencies = [
 
 [[package]]
 name = "sha2"
-version = "0.9.3"
+version = "0.9.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fa827a14b29ab7f44778d14a88d3cb76e949c45083f7dbfa507d0cb699dc12de"
+checksum = "b362ae5752fd2137731f9fa25fd4d9058af34666ca1966fb969119cc35719f12"
 dependencies = [
  "block-buffer 0.9.0",
  "cfg-if 1.0.0",
- "cpuid-bool 0.1.2",
+ "cpufeatures",
  "digest 0.9.0",
  "opaque-debug 0.3.0",
 ]
@@ -6830,9 +7133,9 @@ checksum = "7fdf1b9db47230893d76faad238fd6097fd6d6a9245cd7a4d90dbd639536bbd2"
 
 [[package]]
 name = "signal-hook"
-version = "0.3.7"
+version = "0.3.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6aa894ef3fade0ee7243422f4fbbd6c2b48e6de767e621d37ef65f2310f53cea"
+checksum = "470c5a6397076fae0094aaf06a08e6ba6f37acb77d3b1b91ea92b4d6c8650c39"
 dependencies = [
  "libc",
  "signal-hook-registry",
@@ -6840,9 +7143,9 @@ dependencies = [
 
 [[package]]
 name = "signal-hook-registry"
-version = "1.3.0"
+version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "16f1d0fef1604ba8f7a073c7e701f213e056707210e9020af4528e0101ce11a6"
+checksum = "e51e73328dc4ac0c7ccbda3a494dfa03df1de2f46018127f60c693f2648455b0"
 dependencies = [
  "libc",
 ]
@@ -6855,21 +7158,33 @@ checksum = "0f0242b8e50dd9accdd56170e94ca1ebd223b098eb9c83539a6e367d0f36ae68"
 
 [[package]]
 name = "simba"
-version = "0.1.5"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5132a955559188f3d13c9ba831e77c802ddc8782783f050ed0c52f5988b95f4c"
+dependencies = [
+ "approx 0.4.0",
+ "num-complex 0.3.1",
+ "num-traits",
+ "paste",
+]
+
+[[package]]
+name = "simba"
+version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fb931b1367faadea6b1ab1c306a860ec17aaa5fa39f367d0c744e69d971a1fb2"
+checksum = "8e82063457853d00243beda9952e910b82593e4b07ae9f721b9278a99a0d3d5c"
 dependencies = [
- "approx",
- "num-complex 0.2.4",
+ "approx 0.5.0",
+ "num-complex 0.4.0",
  "num-traits",
- "paste 0.1.18",
+ "paste",
 ]
 
 [[package]]
 name = "slab"
-version = "0.4.2"
+version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c111b5bd5695e56cffe5129854aa230b39c93a305372fdbb2668ca2394eea9f8"
+checksum = "f173ac3d1a7e3b28003f40de0b5ce7fe2710f9b9dc3fc38664cebee46b3b6527"
 
 [[package]]
 name = "smallvec"
@@ -6899,7 +7214,7 @@ dependencies = [
  "rand_core 0.5.1",
  "ring",
  "rustc_version",
- "sha2 0.9.3",
+ "sha2 0.9.5",
  "subtle 2.4.0",
  "x25519-dalek",
 ]
@@ -6934,11 +7249,11 @@ dependencies = [
  "base64 0.12.3",
  "bytes 0.5.6",
  "flate2",
- "futures 0.3.13",
+ "futures 0.3.15",
  "httparse",
  "log",
  "rand 0.7.3",
- "sha-1 0.9.4",
+ "sha-1 0.9.6",
 ]
 
 [[package]]
@@ -6961,7 +7276,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e63c3460d5daecf67df542c34c2bbd636214a5a200d4bddcfa2ffb9e72c346af"
 dependencies = [
  "hash-db",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "sp-api-proc-macro",
  "sp-core",
  "sp-runtime",
@@ -6978,7 +7293,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "289624f4fe0f61e63a5019ed26c3bc732b5145eb52796ac6053cd72656d947a1"
 dependencies = [
  "blake2-rfc",
- "proc-macro-crate",
+ "proc-macro-crate 0.1.5",
  "proc-macro2",
  "quote",
  "syn",
@@ -6990,7 +7305,7 @@ version = "3.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c52e2e6d43036b97c4fce1ed87c5262c1ffdc78c655ada4d3024a3f8094bdd2c"
 dependencies = [
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "serde",
  "sp-core",
  "sp-io",
@@ -7005,7 +7320,7 @@ checksum = "d0f1c69966c192d1dee8521f0b29ece2b14db07b9b44d801a94e295234761645"
 dependencies = [
  "integer-sqrt",
  "num-traits",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "serde",
  "sp-debug-derive",
  "sp-std 3.0.0",
@@ -7017,7 +7332,7 @@ version = "3.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1ec68fb8e5a37548b06c14ee91a9c574cc330324c86d37810ec29dd4f8bc68d7"
 dependencies = [
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "sp-inherents",
  "sp-runtime",
  "sp-std 3.0.0",
@@ -7029,7 +7344,7 @@ version = "3.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0adc979dbe619f56d664ebd1293dce13fcad6b8a47bcdd620ed53a454d330d12"
 dependencies = [
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "sp-api",
  "sp-inherents",
  "sp-runtime",
@@ -7042,10 +7357,10 @@ version = "3.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e8007c1ad8e9fb6cd8eed4e0fc91504a9ca4b228e1315302a2fbb0ac7f509f1b"
 dependencies = [
- "futures 0.3.13",
+ "futures 0.3.15",
  "log",
  "lru",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "parking_lot 0.11.1",
  "sp-api",
  "sp-consensus",
@@ -7071,11 +7386,11 @@ version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "884db6c4b03f0f2fb2993127a2db95fc740fcd3496746dcaa6829c9868e7dc75"
 dependencies = [
- "futures 0.3.13",
+ "futures 0.3.15",
  "futures-timer 3.0.2",
  "libp2p",
  "log",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "parking_lot 0.11.1",
  "serde",
  "sp-api",
@@ -7098,7 +7413,7 @@ version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4bd00fc95b26393522be1394fb67cc536736cc5a902dec0d3e2827909b7c1118"
 dependencies = [
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "sp-api",
  "sp-application-crypto",
  "sp-consensus-slots",
@@ -7115,7 +7430,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a153085b1542b5cbe23686433cd36d1a634964f1b707671d0ffb01d8d9313047"
 dependencies = [
  "merlin",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "sp-api",
  "sp-application-crypto",
  "sp-consensus",
@@ -7129,13 +7444,26 @@ dependencies = [
  "sp-timestamp",
 ]
 
+[[package]]
+name = "sp-consensus-pow"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a2aa1ffa45f7ad66c613fa3906823a0cc0d33ce2d0e7495f2037c5c4c3211481"
+dependencies = [
+ "parity-scale-codec 2.1.3",
+ "sp-api",
+ "sp-core",
+ "sp-runtime",
+ "sp-std 3.0.0",
+]
+
 [[package]]
 name = "sp-consensus-slots"
 version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "32bd501ab76c827d74f145063cd8cb993a9f634dac93c9b0d909111cd5900a6a"
 dependencies = [
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "sp-arithmetic",
  "sp-runtime",
 ]
@@ -7146,7 +7474,7 @@ version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "030895d70bf3095c857f4727a7cce7c43af29efe3413bb547ee28700f7d78766"
 dependencies = [
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "schnorrkel",
  "sp-core",
  "sp-runtime",
@@ -7164,7 +7492,7 @@ dependencies = [
  "byteorder",
  "dyn-clonable",
  "ed25519-dalek",
- "futures 0.3.13",
+ "futures 0.3.15",
  "hash-db",
  "hash256-std-hasher",
  "hex",
@@ -7174,16 +7502,16 @@ dependencies = [
  "log",
  "merlin",
  "num-traits",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "parity-util-mem",
  "parking_lot 0.11.1",
- "primitive-types",
+ "primitive-types 0.9.0",
  "rand 0.7.3",
  "regex",
  "schnorrkel",
  "secrecy",
  "serde",
- "sha2 0.9.3",
+ "sha2 0.9.5",
  "sp-debug-derive",
  "sp-externalities",
  "sp-runtime-interface",
@@ -7226,7 +7554,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2fdc625f8c7b13b9a136d334888b21b5743d2081cb666cb03efca1dc9b8f74d1"
 dependencies = [
  "environmental",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "sp-std 3.0.0",
  "sp-storage",
 ]
@@ -7239,7 +7567,7 @@ checksum = "702e0be150e1b557df42326ec9b82c2010366631d03be27c69912d446abbf87a"
 dependencies = [
  "finality-grandpa",
  "log",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "serde",
  "sp-api",
  "sp-application-crypto",
@@ -7255,7 +7583,7 @@ version = "3.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2542380b535c6941502a0a3069a657eb5abb70fd67b11afa164d4a4b038ba73a"
 dependencies = [
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "parking_lot 0.11.1",
  "sp-core",
  "sp-std 3.0.0",
@@ -7268,11 +7596,11 @@ version = "3.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "33fd69f0a6e91bedc2fb1c5cc3689c212474b6c918274cb4cb14dbbe3c428c14"
 dependencies = [
- "futures 0.3.13",
+ "futures 0.3.15",
  "hash-db",
  "libsecp256k1",
  "log",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "parking_lot 0.11.1",
  "sp-core",
  "sp-externalities",
@@ -7307,9 +7635,9 @@ checksum = "db6ccd2baf189112355338e8b224dc513cd239b974dbd717f12b3dc7a7248c3b"
 dependencies = [
  "async-trait",
  "derive_more",
- "futures 0.3.13",
+ "futures 0.3.15",
  "merlin",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "parking_lot 0.11.1",
  "schnorrkel",
  "serde",
@@ -7357,9 +7685,9 @@ dependencies = [
  "hash256-std-hasher",
  "impl-trait-for-tuples 0.2.1",
  "log",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "parity-util-mem",
- "paste 1.0.5",
+ "paste",
  "rand 0.7.3",
  "serde",
  "sp-application-crypto",
@@ -7376,8 +7704,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b2e5c88b4bc8d607e4e2ff767a85db58cf7101f3dd6064f06929342ea67fe8fb"
 dependencies = [
  "impl-trait-for-tuples 0.2.1",
- "parity-scale-codec",
- "primitive-types",
+ "parity-scale-codec 2.1.3",
+ "primitive-types 0.9.0",
  "sp-externalities",
  "sp-runtime-interface-proc-macro",
  "sp-std 3.0.0",
@@ -7394,7 +7722,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "19a6c7c2251512c9e533d15db8a863b06ece1cbee778130dd9adbe44b6b39aa9"
 dependencies = [
  "Inflector",
- "proc-macro-crate",
+ "proc-macro-crate 0.1.5",
  "proc-macro2",
  "quote",
  "syn",
@@ -7416,7 +7744,7 @@ version = "3.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2c7cf161533725a78083b04f3269effe4c3b4b6ce5f655019b3eec3e729ba4d4"
 dependencies = [
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "sp-api",
  "sp-core",
  "sp-runtime",
@@ -7430,7 +7758,7 @@ version = "3.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fc729eb10f8809c61a1fe439ac118a4413de004aaf863003ee8752ac0b596e73"
 dependencies = [
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "sp-runtime",
  "sp-std 3.0.0",
 ]
@@ -7444,7 +7772,7 @@ dependencies = [
  "hash-db",
  "log",
  "num-traits",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "parking_lot 0.11.1",
  "rand 0.7.3",
  "smallvec 1.6.1",
@@ -7476,7 +7804,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "86af458d4a0251c490cdde9dcaaccb88d398f3b97ac6694cdd49ed9337e6b961"
 dependencies = [
  "impl-serde",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "ref-cast",
  "serde",
  "sp-debug-derive",
@@ -7504,7 +7832,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "27387c541197b9f47f3d9ddcab5649a3ecdca582d2f2ea2b511af24a3d3cbf83"
 dependencies = [
  "impl-trait-for-tuples 0.2.1",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "sp-api",
  "sp-inherents",
  "sp-runtime",
@@ -7519,7 +7847,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "567382d8d4e14fb572752863b5cd57a78f9e9a6583332b590b726f061f3ea957"
 dependencies = [
  "log",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "sp-std 3.0.0",
  "tracing",
  "tracing-core",
@@ -7533,9 +7861,9 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3264d3b7ea31483eddffa2cc7f28c4d9c022598e456a985fd1cb5879a4609853"
 dependencies = [
  "derive_more",
- "futures 0.3.13",
+ "futures 0.3.15",
  "log",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "serde",
  "sp-api",
  "sp-blockchain",
@@ -7551,7 +7879,7 @@ checksum = "b85b7f745da41ef825c6f7b93f1fdc897b03df94a4884adfbb70fbcd0aed1298"
 dependencies = [
  "hash-db",
  "memory-db",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "sp-core",
  "sp-std 3.0.0",
  "trie-db",
@@ -7564,7 +7892,7 @@ version = "3.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b4ec2a5f924f7affd1e959f8f3c02bd87cdfa0e11c71a4cbc075f955ead8c1a1"
 dependencies = [
- "futures 0.3.13",
+ "futures 0.3.15",
  "futures-core",
  "futures-timer 3.0.2",
  "lazy_static",
@@ -7578,7 +7906,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dbeffa538a13d715d30e01d57a2636ba32845b737a29a3ea32403576588222e7"
 dependencies = [
  "impl-serde",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "serde",
  "sp-runtime",
  "sp-std 3.0.0",
@@ -7591,7 +7919,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b214e125666a6416cf30a70cc6a5dacd34a4e5197f8a3d479f714af7e1dc7a47"
 dependencies = [
  "impl-trait-for-tuples 0.2.1",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "sp-std 3.0.0",
  "wasmi",
 ]
@@ -7616,11 +7944,15 @@ checksum = "a2eb9349b6444b326872e140eb1cf5e7c522154d69e7a0ffb0fb81c06b37543f"
 
 [[package]]
 name = "statrs"
-version = "0.12.0"
+version = "0.14.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cce16f6de653e88beca7bd13780d08e09d4489dbca1f9210e041bc4852481382"
+checksum = "1e0c1f144861fbfd2a8cc82d564ccbf7fb3b7834d4fa128b84e9c2a73371aead"
 dependencies = [
- "rand 0.7.3",
+ "approx 0.4.0",
+ "lazy_static",
+ "nalgebra 0.26.2",
+ "num-traits",
+ "rand 0.8.4",
 ]
 
 [[package]]
@@ -7713,10 +8045,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "acb439bec2318e98b83f1e12ddaaf2082d6fc29becc3117714ccb575fa343bc1"
 dependencies = [
  "byteorder",
- "crunchy",
+ "crunchy 0.2.2",
  "lazy_static",
  "rand 0.5.6",
- "rustc-hex",
+ "rustc-hex 2.1.0",
 ]
 
 [[package]]
@@ -7735,12 +8067,12 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8e46123ec4a690d91967de07cd6af4dde90d14519a1a8d43f61bd3f78dd3d0ef"
 dependencies = [
  "frame-system-rpc-runtime-api",
- "futures 0.3.13",
+ "futures 0.3.15",
  "jsonrpc-core 15.1.0",
  "jsonrpc-core-client 15.1.0",
  "jsonrpc-derive 15.1.0",
  "log",
- "parity-scale-codec",
+ "parity-scale-codec 2.1.3",
  "sc-client-api",
  "sc-rpc-api",
  "serde",
@@ -7797,9 +8129,9 @@ checksum = "1e81da0851ada1f3e9d4312c704aa4f8806f0f9d69faaf8df2f3464b4a9437c2"
 
 [[package]]
 name = "syn"
-version = "1.0.65"
+version = "1.0.73"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f3a1d708c221c5a612956ef9f75b37e454e88d1f7b899fbd3a18d4252012d663"
+checksum = "f71489ff30030d2ae598524f61326b902466f72a0fb1a8564c001cc63425bcc7"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -7836,6 +8168,16 @@ version = "0.11.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "422045212ea98508ae3d28025bc5aaa2bd4a9cdaecd442a08da2ee620ee9ea95"
 
+[[package]]
+name = "tempdir"
+version = "0.3.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "15f2b5fb00ccdf689e0149d1b1b3c03fead81c2b37735d812fa8bddbbf41b6d8"
+dependencies = [
+ "rand 0.4.6",
+ "remove_dir_all",
+]
+
 [[package]]
 name = "tempfile"
 version = "3.2.0"
@@ -7844,8 +8186,8 @@ checksum = "dac1c663cfc93810f88aed9b8941d48cabf856a1b111c29a40439018d870eb22"
 dependencies = [
  "cfg-if 1.0.0",
  "libc",
- "rand 0.8.3",
- "redox_syscall 0.2.5",
+ "rand 0.8.4",
+ "redox_syscall 0.2.9",
  "remove_dir_all",
  "winapi 0.3.9",
 ]
@@ -7870,18 +8212,18 @@ dependencies = [
 
 [[package]]
 name = "thiserror"
-version = "1.0.24"
+version = "1.0.25"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e0f4a65597094d4483ddaed134f409b2cb7c1beccf25201a9f73c719254fa98e"
+checksum = "fa6f76457f59514c7eeb4e59d891395fab0b2fd1d40723ae737d64153392e9c6"
 dependencies = [
  "thiserror-impl",
 ]
 
 [[package]]
 name = "thiserror-impl"
-version = "1.0.24"
+version = "1.0.25"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7765189610d8241a44529806d6fd1f2e0a08734313a35d5b3a556f92b381f3c0"
+checksum = "8a36768c0fbf1bb15eca10defa29526bda730a2376c2ab4393ccfa16fb1a318d"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -7929,7 +8271,7 @@ dependencies = [
  "pbkdf2 0.4.0",
  "rand 0.7.3",
  "rustc-hash",
- "sha2 0.9.3",
+ "sha2 0.9.5",
  "thiserror",
  "unicode-normalization",
  "zeroize",
@@ -7941,14 +8283,14 @@ version = "2.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2c9d3793400a45f954c52e73d068316d76b6f4e36977e3fcebb13a2721e80237"
 dependencies = [
- "crunchy",
+ "crunchy 0.2.2",
 ]
 
 [[package]]
 name = "tinyvec"
-version = "1.1.1"
+version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "317cca572a0e89c3ce0ca1f1bdc9369547fe318a683418e42ac8f59d14701023"
+checksum = "5b5220f05bb7de7f3f53c7c065e1199b3172696fe2db9f9c4d8ad9b4ee74c342"
 dependencies = [
  "tinyvec_macros",
 ]
@@ -8239,9 +8581,9 @@ checksum = "360dfd1d6d30e05fda32ace2c8c70e9c0a9da713275777f5a4dbb8a1893930c6"
 
 [[package]]
 name = "tracing"
-version = "0.1.25"
+version = "0.1.26"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "01ebdc2bb4498ab1ab5f5b73c5803825e60199229ccba0698170e3be0e7f959f"
+checksum = "09adeb8c97449311ccd28a427f96fb563e7fd31aabf994189879d9da2394b89d"
 dependencies = [
  "cfg-if 1.0.0",
  "log",
@@ -8263,9 +8605,9 @@ dependencies = [
 
 [[package]]
 name = "tracing-core"
-version = "0.1.17"
+version = "0.1.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f50de3927f93d202783f4513cda820ab47ef17f624b03c096e86ef00c67e6b5f"
+checksum = "a9ff14f98b1a4b289c6248a023c1c2fa1491062964e9fed67ab29c4e4da4a052"
 dependencies = [
  "lazy_static",
 ]
@@ -8276,7 +8618,7 @@ version = "0.2.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "97d095ae15e245a057c8e8451bab9b3ee1e1f68e9ba2b4fbc18d0ac5237835f2"
 dependencies = [
- "pin-project 1.0.6",
+ "pin-project 1.0.7",
  "tracing",
 ]
 
@@ -8303,9 +8645,9 @@ dependencies = [
 
 [[package]]
 name = "tracing-subscriber"
-version = "0.2.17"
+version = "0.2.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "705096c6f83bf68ea5d357a6aa01829ddbdac531b357b45abeca842938085baa"
+checksum = "aa5553bf0883ba7c9cbe493b085c29926bd41b66afc31ff72cf17ff4fb60dcd5"
 dependencies = [
  "ansi_term 0.12.1",
  "chrono",
@@ -8325,14 +8667,14 @@ dependencies = [
 
 [[package]]
 name = "trie-db"
-version = "0.22.3"
+version = "0.22.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ec051edf7f0fc9499a2cb0947652cab2148b9d7f61cee7605e312e9f970dacaf"
+checksum = "cd81fe0c8bc2b528a51c9d2c31dae4483367a26a723a3c9a4a8120311d7774e3"
 dependencies = [
  "hash-db",
  "hashbrown",
  "log",
- "rustc-hex",
+ "rustc-hex 2.1.0",
  "smallvec 1.6.1",
 ]
 
@@ -8352,7 +8694,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a1631b201eb031b563d2e85ca18ec8092508e262a3196ce9bd10a67ec87b9f5c"
 dependencies = [
  "hash-db",
- "rlp",
+ "rlp 0.5.0",
 ]
 
 [[package]]
@@ -8384,6 +8726,18 @@ version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "56dee185309b50d1f11bfedef0fe6d036842e3fb77413abef29f8f8d1c5d4c1c"
 
+[[package]]
+name = "uint"
+version = "0.8.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9db035e67dfaf7edd9aebfe8676afcd63eed53c8a4044fed514c8cccf1835177"
+dependencies = [
+ "byteorder",
+ "crunchy 0.2.2",
+ "rustc-hex 2.1.0",
+ "static_assertions",
+]
+
 [[package]]
 name = "uint"
 version = "0.9.0"
@@ -8391,7 +8745,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e11fe9a9348741cf134085ad57c249508345fe16411b3d7fb4ff2da2f1d6382e"
 dependencies = [
  "byteorder",
- "crunchy",
+ "crunchy 0.2.2",
  "hex",
  "static_assertions",
 ]
@@ -8407,18 +8761,18 @@ dependencies = [
 
 [[package]]
 name = "unicode-bidi"
-version = "0.3.4"
+version = "0.3.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "49f2bd0c6468a8230e1db229cff8029217cf623c767ea5d60bfbd42729ea54d5"
+checksum = "eeb8be209bb1c96b7c177c7420d26e04eccacb0eeae6b980e35fcb74678107e0"
 dependencies = [
  "matches",
 ]
 
 [[package]]
 name = "unicode-normalization"
-version = "0.1.17"
+version = "0.1.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "07fbfce1c8a97d547e8b5334978438d9d6ec8c20e38f56d4a4374d181493eaef"
+checksum = "d54590932941a9e9266f0832deed84ebe1bf2e4c9e4a3554d393d18f5e854bf9"
 dependencies = [
  "tinyvec",
 ]
@@ -8437,9 +8791,9 @@ checksum = "9337591893a19b88d8d87f2cec1e73fad5cdfd10e5a6f349f498ad6ea2ffb1e3"
 
 [[package]]
 name = "unicode-xid"
-version = "0.2.1"
+version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f7fe0bb3479651439c9112f72b6c505038574c9fbb575ed1bf3b797fa39dd564"
+checksum = "8ccb82d61f80a663efe1f787a51b16b5a51e3314d6ac365b08639f52387b33f3"
 
 [[package]]
 name = "universal-hash"
@@ -8500,36 +8854,31 @@ dependencies = [
 
 [[package]]
 name = "url"
-version = "2.2.1"
+version = "2.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9ccd964113622c8e9322cfac19eb1004a07e636c545f325da085d5cdde6f1f8b"
+checksum = "a507c383b2d33b5fc35d1861e77e6b383d158b2da5e14fe51b83dfedf6fd578c"
 dependencies = [
  "form_urlencoded",
- "idna 0.2.2",
+ "idna 0.2.3",
  "matches",
  "percent-encoding 2.1.0",
 ]
 
 [[package]]
 name = "value-bag"
-version = "1.0.0-alpha.6"
+version = "1.0.0-alpha.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6b676010e055c99033117c2343b33a40a30b91fecd6c49055ac9cd2d6c305ab1"
+checksum = "dd320e1520f94261153e96f7534476ad869c14022aee1e59af7c778075d840ae"
 dependencies = [
  "ctor",
+ "version_check",
 ]
 
 [[package]]
 name = "vcpkg"
-version = "0.2.11"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b00bca6106a5e23f3eee943593759b7fcddb00554332e856d990c893966879fb"
-
-[[package]]
-name = "vec-arena"
-version = "1.1.0"
+version = "0.2.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "34b2f665b594b07095e3ac3f718e13c2197143416fae4c5706cffb7b1af8d7f1"
+checksum = "70455df2fdf4e9bf580a92e443f1eb0303c390d682e2ea817312c9e81f8c3399"
 
 [[package]]
 name = "vec_map"
@@ -8601,9 +8950,9 @@ checksum = "1a143597ca7c7793eff794def352d41792a93c481eb1042423ff7ff72ba2c31f"
 
 [[package]]
 name = "wasm-bindgen"
-version = "0.2.72"
+version = "0.2.74"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8fe8f61dba8e5d645a4d8132dc7a0a66861ed5e1045d2c0ed940fab33bac0fbe"
+checksum = "d54ee1d4ed486f78874278e63e4069fc1ab9f6a18ca492076ffb90c5eb2997fd"
 dependencies = [
  "cfg-if 1.0.0",
  "wasm-bindgen-macro",
@@ -8611,9 +8960,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-backend"
-version = "0.2.72"
+version = "0.2.74"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "046ceba58ff062da072c7cb4ba5b22a37f00a302483f7e2a6cdc18fedbdc1fd3"
+checksum = "3b33f6a0694ccfea53d94db8b2ed1c3a8a4c86dd936b13b9f0a15ec4a451b900"
 dependencies = [
  "bumpalo",
  "lazy_static",
@@ -8626,9 +8975,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-futures"
-version = "0.4.22"
+version = "0.4.24"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "73157efb9af26fb564bb59a009afd1c7c334a44db171d280690d0c3faaec3468"
+checksum = "5fba7978c679d53ce2d0ac80c8c175840feb849a161664365d1287b41f2e67f1"
 dependencies = [
  "cfg-if 1.0.0",
  "js-sys",
@@ -8638,9 +8987,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-macro"
-version = "0.2.72"
+version = "0.2.74"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0ef9aa01d36cda046f797c57959ff5f3c615c9cc63997a8d545831ec7976819b"
+checksum = "088169ca61430fe1e58b8096c24975251700e7b1f6fd91cc9d59b04fb9b18bd4"
 dependencies = [
  "quote",
  "wasm-bindgen-macro-support",
@@ -8648,9 +8997,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-macro-support"
-version = "0.2.72"
+version = "0.2.74"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "96eb45c1b2ee33545a813a92dbb53856418bf7eb54ab34f7f7ff1448a5b3735d"
+checksum = "be2241542ff3d9f241f5e2cb6dd09b37efe786df8851c54957683a49f0987a97"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -8661,9 +9010,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-shared"
-version = "0.2.72"
+version = "0.2.74"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b7148f4696fb4960a346eaa60bbfb42a1ac4ebba21f750f75fc1375b098d5ffa"
+checksum = "d7cff876b8f18eed75a66cf49b65e7f967cb354a7aa16003fb55dbfd25b44b4f"
 
 [[package]]
 name = "wasm-gc-api"
@@ -8682,7 +9031,7 @@ version = "0.2.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "be0ecb0db480561e9a7642b5d3e4187c128914e58aa84330b9493e3eb68c5e7f"
 dependencies = [
- "futures 0.3.13",
+ "futures 0.3.15",
  "js-sys",
  "parking_lot 0.11.1",
  "pin-utils",
@@ -8764,7 +9113,7 @@ dependencies = [
  "libc",
  "log",
  "serde",
- "sha2 0.9.3",
+ "sha2 0.9.5",
  "toml",
  "winapi 0.3.9",
  "zstd",
@@ -8790,7 +9139,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e91fa931df6dd8af2b02606307674d3bad23f55473d5f4c809dddf7e4c4dc411"
 dependencies = [
  "anyhow",
- "gimli",
+ "gimli 0.23.0",
  "more-asserts",
  "object 0.22.0",
  "target-lexicon",
@@ -8810,7 +9159,7 @@ dependencies = [
  "cranelift-codegen",
  "cranelift-entity",
  "cranelift-wasm",
- "gimli",
+ "gimli 0.23.0",
  "indexmap",
  "log",
  "more-asserts",
@@ -8825,7 +9174,7 @@ version = "0.22.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "738bfcd1561ede8bb174215776fd7d9a95d5f0a47ca3deabe0282c55f9a89f68"
 dependencies = [
- "addr2line",
+ "addr2line 0.14.1",
  "anyhow",
  "cfg-if 1.0.0",
  "cranelift-codegen",
@@ -8833,7 +9182,7 @@ dependencies = [
  "cranelift-frontend",
  "cranelift-native",
  "cranelift-wasm",
- "gimli",
+ "gimli 0.23.0",
  "log",
  "more-asserts",
  "object 0.22.0",
@@ -8874,7 +9223,7 @@ checksum = "60bb672c9d894776d7b9250dd9b4fe890f8760201ee4f53e5f2da772b6c4debb"
 dependencies = [
  "anyhow",
  "cfg-if 1.0.0",
- "gimli",
+ "gimli 0.23.0",
  "lazy_static",
  "libc",
  "object 0.22.0",
@@ -8898,7 +9247,7 @@ dependencies = [
  "lazy_static",
  "libc",
  "log",
- "memoffset 0.6.2",
+ "memoffset 0.6.4",
  "more-asserts",
  "psm",
  "region",
@@ -8909,27 +9258,27 @@ dependencies = [
 
 [[package]]
 name = "wast"
-version = "35.0.1"
+version = "36.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1a5800e9f86a1eae935e38bea11e60fd253f6d514d153fb39b3e5535a7b37b56"
+checksum = "8b5d7ba374a364571da1cb0a379a3dc302582a2d9937a183bfe35b68ad5bb9c4"
 dependencies = [
  "leb128",
 ]
 
 [[package]]
 name = "wat"
-version = "1.0.36"
+version = "1.0.38"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0b0fa059022c5dabe129f02b429d67086400deb8277f89c975555dacc1dadbcc"
+checksum = "16383df7f0e3901484c2dda6294ed6895caa3627ce4f6584141dcf30a33a23e6"
 dependencies = [
  "wast",
 ]
 
 [[package]]
 name = "web-sys"
-version = "0.3.49"
+version = "0.3.51"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "59fe19d70f5dacc03f6e46777213facae5ac3801575d56ca6cbd4c93dcd12310"
+checksum = "e828417b379f3df7111d3a2a9e5753706cae29c41f7c4029ee9fd77f3e09e582"
 dependencies = [
  "js-sys",
  "wasm-bindgen",
@@ -8947,39 +9296,30 @@ dependencies = [
 
 [[package]]
 name = "webpki-roots"
-version = "0.21.0"
+version = "0.21.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "82015b7e0b8bad8185994674a13a93306bea76cf5a16c5a181382fd3a5ec2376"
+checksum = "aabe153544e473b775453675851ecc86863d2a81d786d741f6b76778f2a48940"
 dependencies = [
  "webpki",
 ]
 
 [[package]]
-name = "wepoll-sys"
-version = "3.0.1"
+name = "wepoll-ffi"
+version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0fcb14dea929042224824779fbc82d9fab8d2e6d3cbc0ac404de8edf489e77ff"
+checksum = "d743fdedc5c64377b5fc2bc036b01c7fd642205a0d96356034ae3404d49eb7fb"
 dependencies = [
  "cc",
 ]
 
 [[package]]
 name = "which"
-version = "3.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d011071ae14a2f6671d0b74080ae0cd8ebf3a6f8c9589a2cd45f23126fe29724"
-dependencies = [
- "libc",
-]
-
-[[package]]
-name = "which"
-version = "4.0.2"
+version = "4.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "87c14ef7e1b8b8ecfc75d5eca37949410046e66f15d185c01d70824f1f8111ef"
+checksum = "b55551e42cbdf2ce2bedd2203d0cc08dba002c27510f86dab6d0ce304cba3dfe"
 dependencies = [
+ "either",
  "libc",
- "thiserror",
 ]
 
 [[package]]
@@ -9043,11 +9383,11 @@ checksum = "85e60b0d1b5f99db2556934e21937020776a5d31520bf169e851ac44e6420214"
 
 [[package]]
 name = "x25519-dalek"
-version = "1.1.0"
+version = "1.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bc614d95359fd7afc321b66d2107ede58b246b844cf5d8a0adcca413e439f088"
+checksum = "5a0c105152107e3b96f6a00a65e86ce82d9b125230e1c4302940eca58ff71f4f"
 dependencies = [
- "curve25519-dalek 3.0.2",
+ "curve25519-dalek 3.1.0",
  "rand_core 0.5.1",
  "zeroize",
 ]
@@ -9058,7 +9398,7 @@ version = "0.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1cc7bd8c983209ed5d527f44b01c41b7dc146fd960c61cf9e1d25399841dc271"
 dependencies = [
- "futures 0.3.13",
+ "futures 0.3.15",
  "log",
  "nohash-hasher",
  "parking_lot 0.11.1",
@@ -9068,18 +9408,18 @@ dependencies = [
 
 [[package]]
 name = "zeroize"
-version = "1.2.0"
+version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "81a974bcdd357f0dca4d41677db03436324d45a4c9ed2d0b873a5a360ce41c36"
+checksum = "4756f7db3f7b5574938c3eb1c117038b8e07f95ee6718c0efad4ac21508f1efd"
 dependencies = [
  "zeroize_derive",
 ]
 
 [[package]]
 name = "zeroize_derive"
-version = "1.0.1"
+version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c3f369ddb18862aba61aa49bf31e74d29f0f162dec753063200e1dc084345d16"
+checksum = "a2c1e130bebaeab2f23886bf9acbaca14b092408c452543c857f66399cd6dab1"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/Dockerfile b/Dockerfile
index 66c1c785..18719249 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,16 @@
+### build stage
+FROM rust:1.51-slim as builder
+ENV USER root
+ENV CI_PROJECT_NAME docker
+RUN apt-get update && apt-get install -y git cmake pkg-config libssl-dev git clang libclang-dev
+RUN rustup default nightly && rustup target add wasm32-unknown-unknown
+RUN rustup default nightly && rustup target add wasm32-unknown-unknown
+COPY . .
+RUN CI_PROJECT_NAME=docker sh scripts/init.sh
+RUN cargo build --release
+
 ### package stage
-FROM debian:bullseye-slim
+FROM debian:stretch-slim
 # metadata
 ARG VCS_REF
 ARG BUILD_DATE
@@ -11,7 +22,6 @@ RUN apt-get update && \
 	DEBIAN_FRONTEND=noninteractive apt-get install -y \
 		libssl1.1 \
 		ca-certificates \
-		glibc \
 		curl && \
 # apt cleanup
 	apt-get autoremove -y && \
@@ -20,9 +30,7 @@ RUN apt-get update && \
 # add user
 	useradd -m -u 1000 -U -s /bin/sh -d /metaverse mvs
 # add binary to docker image
-COPY ./target/release/metaverse /usr/local/bin/metaverse
-COPY ./mainnet.json ./mainnet
-COPY ./mainnet.json .
+COPY --from=builder /target/release/metaversevm /usr/local/bin/metaverse
 USER mvs
 # check if executable works in this container
 RUN /usr/local/bin/metaverse --version
diff --git a/README.md b/README.md
index 432536c2..bc801a2d 100644
--- a/README.md
+++ b/README.md
@@ -10,21 +10,133 @@ Follow the steps below to take control and compile your own node. :hammer_and_wr
 
 First, complete the [basic Rust setup instructions](./doc/rust-setup.md).
 
+### Build
+
+The `cargo run` command will perform an initial build. Use the following command to build the node
+without launching it:
+
+```sh
+cargo build --release
+```
+
 ### Run
 
-Use Rust's native `cargo` command to build and launch the template node:
+Launch one metaverse node:
 
 ```sh
-cargo run --release -- --dev --tmp
+./target/release/metaversevm --validator --tmp --rpc-cors all 
 ```
 
-### Build
 
-The `cargo run` command will perform an initial build. Use the following command to build the node
-without launching it:
+
+Launch a test net with 3 metaverse node at localhost :
+
+On console for node01:
 
 ```sh
-cargo build --release
+./target/release/metaversevm --validator --tmp --rpc-cors all \
+    --node-key 0000000000000000000000000000000000000000000000000000000000000111
+```
+
+On console for node02:
+
+```
+./target/release/metaversevm --validator --tmp --rpc-cors all \
+    --port 30334 \
+    --ws-port 9946 \
+    --rpc-port 9934 \
+    --bootnodes /ip4/127.0.0.1/tcp/30333/p2p/12D3KooWRBaMZHnFYtT1B143sSLHkx8G6ysPSg8PMzqXkymm38Ld
+```
+
+On console for node03:
+```
+./target/release/metaversevm --validator --tmp --rpc-cors all \
+    --port 30335 \
+    --ws-port 9947 \
+    --rpc-port 9935 \
+    --bootnodes /ip4/127.0.0.1/tcp/30333/p2p/12D3KooWRBaMZHnFYtT1B143sSLHkx8G6ysPSg8PMzqXkymm38Ld
+```
+
+### GPU mining
+
+**Install miner**
+
+Access the project's [releases page](https://github.com/ethereum-mining/ethminer/releases), and pick up the latest Linux tarball. Unpack the tarball in the directory where you want to run Ethminer. It's a pre-compiled binary, so that's all you need to do before you start using it.
+
+```sh
+$ mkdir ethminer
+$ wget -O ethminer/ethminer.tar.gz https://github.com/ethereum-mining/ethminer/releases/download/v0.18.0/ethminer-0.18.0-cuda-9-linux-x86_64.tar.gz
+$ tar xzf ethminer/ethminer.tar.gz -C ethminer/
+$ ethminer/bin/ethminer --help
+ethminer 0.18.0
+Build: linux/release/gnu
+
+Ethminer - GPU ethash miner
+minimal usage : ethminer [DEVICES_TYPE] [OPTIONS] -P... [-P...]
+```
+
+**Run miner**
+
+```sh
+// Change to correct RPC port to get work
+ethminer/bin/ethminer -P http://127.0.0.1:9933
+```
+
+### CPU mining(only for test)
+
+**Dependencies:**
+
+Linux-based:
+
+```
+sudo apt-get install libleveldb-dev libcurl4-openssl-dev libmicrohttpd-dev libudev-dev cmake
+```
+
+macOS:
+
+```
+brew install leveldb libmicrohttpd
+```
+
+**Install:**
+
+```
+git clone --depth=1 https://github.com/avatar-lavventura/ethminer.git 
+cd ethminer
+./scripts/install_deps.sh
+```
+
+**Build:**
+
+```
+cmake -H. -Bbuild
+cd build/ethminer
+make -j $(nproc)
+```
+
+**Run miner**
+
+```sh
+// Change to correct RPC port to get work
+./ethminer -F http://localhost:9933 --mining-threads 4
+```
+
+**Notice**
+
+If the compilation doesn't work through, it could be the C++ compiler version problem, please follow these step:
+
+```sh
+vi cmake/EthCompilerSettings.cmake
+...
+# comment out this line
+#add_compile_options(-Werror)
+...
+...
+# at last line add
+add_compile_options($<$<COMPILE_LANGUAGE:CXX>:-Wno-deprecated-copy>)
+add_compile_options($<$<COMPILE_LANGUAGE:CXX>:-Wno-implicit-fallthrough>)
+add_compile_options($<$<COMPILE_LANGUAGE:CXX>:-Wno-maybe-uninitialized>)
+...
 ```
 
 ### Embedded Docs
diff --git a/client/consensus/consensus-pow/Cargo.lock b/client/consensus/consensus-pow/Cargo.lock
new file mode 100644
index 00000000..47ea2df4
--- /dev/null
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diff --git a/client/consensus/consensus-pow/Cargo.toml b/client/consensus/consensus-pow/Cargo.toml
new file mode 100644
index 00000000..345b8bf4
--- /dev/null
+++ b/client/consensus/consensus-pow/Cargo.toml
@@ -0,0 +1,78 @@
+# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
+#
+# When uploading crates to the registry Cargo will automatically
+# "normalize" Cargo.toml files for maximal compatibility
+# with all versions of Cargo and also rewrite `path` dependencies
+# to registry (e.g., crates.io) dependencies
+#
+# If you believe there's an error in this file please file an
+# issue against the rust-lang/cargo repository. If you're
+# editing this file be aware that the upstream Cargo.toml
+# will likely look very different (and much more reasonable)
+
+[package]
+edition = "2018"
+name = "sc-consensus-pow"
+version = "0.9.0"
+authors = ["Parity Technologies <admin@parity.io>"]
+description = "PoW consensus algorithm for substrate"
+homepage = "https://substrate.dev"
+readme = "README.md"
+license = "GPL-3.0-or-later WITH Classpath-exception-2.0"
+repository = "https://github.com/paritytech/substrate/"
+[package.metadata.docs.rs]
+targets = ["x86_64-unknown-linux-gnu"]
+[dependencies.codec]
+version = "2.0.0"
+features = ["derive"]
+package = "parity-scale-codec"
+
+[dependencies.derive_more]
+version = "0.99.2"
+
+[dependencies.futures]
+version = "0.3.1"
+features = ["compat"]
+
+[dependencies.futures-timer]
+version = "3.0.1"
+
+[dependencies.log]
+version = "0.4.8"
+
+[dependencies.parking_lot]
+version = "0.11.1"
+
+[dependencies.prometheus-endpoint]
+version = "0.9.0"
+package = "substrate-prometheus-endpoint"
+
+[dependencies.sc-client-api]
+version = "3.0.0"
+
+[dependencies.sp-api]
+version = "3.0.0"
+
+[dependencies.sp-block-builder]
+version = "3.0.0"
+
+[dependencies.sp-blockchain]
+version = "3.0.0"
+
+[dependencies.sp-consensus]
+version = "0.9.0"
+
+[dependencies.sp-consensus-pow]
+version = "0.9.0"
+
+[dependencies.sp-core]
+version = "3.0.0"
+
+[dependencies.sp-inherents]
+version = "3.0.0"
+
+[dependencies.sp-runtime]
+version = "3.0.0"
+
+[dependencies.sp-timestamp]
+version = "3.0.0"
diff --git a/client/consensus/consensus-pow/README.md b/client/consensus/consensus-pow/README.md
new file mode 100644
index 00000000..a335ec36
--- /dev/null
+++ b/client/consensus/consensus-pow/README.md
@@ -0,0 +1,16 @@
+Proof of work consensus for Substrate.
+
+To use this engine, you can need to have a struct that implements
+`PowAlgorithm`. After that, pass an instance of the struct, along
+with other necessary client references to `import_queue` to setup
+the queue. Use the `start_mine` function for basic CPU mining.
+
+The auxiliary storage for PoW engine only stores the total difficulty.
+For other storage requirements for particular PoW algorithm (such as
+the actual difficulty for each particular blocks), you can take a client
+reference in your `PowAlgorithm` implementation, and use a separate prefix
+for the auxiliary storage. It is also possible to just use the runtime
+as the storage, but it is not recommended as it won't work well with light
+clients.
+
+License: GPL-3.0-or-later WITH Classpath-exception-2.0
\ No newline at end of file
diff --git a/client/consensus/consensus-pow/src/lib.rs b/client/consensus/consensus-pow/src/lib.rs
new file mode 100644
index 00000000..493676fd
--- /dev/null
+++ b/client/consensus/consensus-pow/src/lib.rs
@@ -0,0 +1,742 @@
+// This file is part of Substrate.
+
+// Copyright (C) 2017-2021 Parity Technologies (UK) Ltd.
+// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+//! Proof of work consensus for Substrate.
+//!
+//! To use this engine, you can need to have a struct that implements
+//! `PowAlgorithm`. After that, pass an instance of the struct, along
+//! with other necessary client references to `import_queue` to setup
+//! the queue. Use the `start_mine` function for basic CPU mining.
+//!
+//! The auxiliary storage for PoW engine only stores the total difficulty.
+//! For other storage requirements for particular PoW algorithm (such as
+//! the actual difficulty for each particular blocks), you can take a client
+//! reference in your `PowAlgorithm` implementation, and use a separate prefix
+//! for the auxiliary storage. It is also possible to just use the runtime
+//! as the storage, but it is not recommended as it won't work well with light
+//! clients.
+
+mod worker;
+
+pub use crate::worker::{MiningWorker, MiningMetadata, MiningBuild};
+
+use std::{
+	sync::Arc, any::Any, borrow::Cow, collections::HashMap, marker::PhantomData,
+	cmp::Ordering, time::{Duration, SystemTime, UNIX_EPOCH},
+};
+use futures::{prelude::*, future::Either};
+use parking_lot::Mutex;
+use sc_client_api::{BlockOf, backend::AuxStore, BlockchainEvents};
+use sp_blockchain::{HeaderBackend, ProvideCache, well_known_cache_keys::Id as CacheKeyId};
+use sp_block_builder::BlockBuilder as BlockBuilderApi;
+use sp_runtime::{Justification, RuntimeString};
+use sp_runtime::generic::{BlockId, Digest, DigestItem};
+use sp_runtime::traits::{Block as BlockT, Header as HeaderT};
+use sp_api::ProvideRuntimeApi;
+use sp_consensus_pow::{Seal, TotalDifficulty, POW_ENGINE_ID};
+use sp_inherents::{InherentDataProviders, InherentData};
+use sp_consensus::{
+	BlockImportParams, BlockOrigin, ForkChoiceStrategy, SyncOracle, Environment, Proposer,
+	SelectChain, Error as ConsensusError, CanAuthorWith, RecordProof, BlockImport,
+	BlockCheckParams, ImportResult,
+};
+use sp_consensus::import_queue::{
+	BoxBlockImport, BasicQueue, Verifier, BoxJustificationImport,
+};
+use codec::{Encode, Decode};
+use prometheus_endpoint::Registry;
+use sc_client_api;
+use log::*;
+use sp_timestamp::{InherentError as TIError, TimestampInherentData};
+
+use crate::worker::UntilImportedOrTimeout;
+// use sp_std::{
+// 	convert::TryFrom,
+// };
+
+#[derive(derive_more::Display, Debug)]
+pub enum Error<B: BlockT> {
+	#[display(fmt = "Header uses the wrong engine {:?}", _0)]
+	WrongEngine([u8; 4]),
+	#[display(fmt = "Header {:?} is unsealed", _0)]
+	HeaderUnsealed(B::Hash),
+	#[display(fmt = "PoW validation error: invalid seal")]
+	InvalidSeal,
+	#[display(fmt = "PoW validation error: preliminary verification failed")]
+	FailedPreliminaryVerify,
+	#[display(fmt = "Rejecting block too far in future")]
+	TooFarInFuture,
+	#[display(fmt = "Fetching best header failed using select chain: {:?}", _0)]
+	BestHeaderSelectChain(ConsensusError),
+	#[display(fmt = "Fetching best header failed: {:?}", _0)]
+	BestHeader(sp_blockchain::Error),
+	#[display(fmt = "Best header does not exist")]
+	NoBestHeader,
+	#[display(fmt = "Block proposing error: {:?}", _0)]
+	BlockProposingError(String),
+	#[display(fmt = "Fetch best hash failed via select chain: {:?}", _0)]
+	BestHashSelectChain(ConsensusError),
+	#[display(fmt = "Error with block built on {:?}: {:?}", _0, _1)]
+	BlockBuiltError(B::Hash, ConsensusError),
+	#[display(fmt = "Creating inherents failed: {}", _0)]
+	CreateInherents(sp_inherents::Error),
+	#[display(fmt = "Checking inherents failed: {}", _0)]
+	CheckInherents(String),
+	#[display(fmt = "Multiple pre-runtime digests")]
+	MultiplePreRuntimeDigests,
+	Client(sp_blockchain::Error),
+	Codec(codec::Error),
+	Environment(String),
+	Runtime(RuntimeString),
+	Other(String),
+}
+
+impl<B: BlockT> std::convert::From<Error<B>> for String {
+	fn from(error: Error<B>) -> String {
+		error.to_string()
+	}
+}
+
+impl<B: BlockT> std::convert::From<Error<B>> for ConsensusError {
+	fn from(error: Error<B>) -> ConsensusError {
+		ConsensusError::ClientImport(error.to_string())
+	}
+}
+
+/// Auxiliary storage prefix for PoW engine.
+pub const POW_AUX_PREFIX: [u8; 4] = *b"PoW:";
+
+/// Get the auxiliary storage key used by engine to store total difficulty.
+fn aux_key<T: AsRef<[u8]>>(hash: &T) -> Vec<u8> {
+	POW_AUX_PREFIX.iter().chain(hash.as_ref()).copied().collect()
+}
+
+/// Intermediate value passed to block importer.
+#[derive(Encode, Decode, Clone, Debug, Default)]
+pub struct PowIntermediate<Difficulty> {
+	/// Difficulty of the block, if known.
+	pub difficulty: Option<Difficulty>,
+}
+
+/// Intermediate key for PoW engine.
+pub static INTERMEDIATE_KEY: &[u8] = b"pow1";
+
+/// Auxiliary storage data for PoW.
+#[derive(Encode, Decode, Clone, Debug, Default)]
+pub struct PowAux<Difficulty> {
+	/// Difficulty of the current block.
+	pub difficulty: Difficulty,
+	/// Total difficulty up to current block.
+	pub total_difficulty: Difficulty,
+}
+
+impl<Difficulty> PowAux<Difficulty> where
+	Difficulty: Decode + Default,
+{
+	/// Read the auxiliary from client.
+	pub fn read<C: AuxStore, B: BlockT>(client: &C, hash: &B::Hash) -> Result<Self, Error<B>> {
+		let key = aux_key(&hash);
+
+		match client.get_aux(&key).map_err(Error::Client)? {
+			Some(bytes) => Self::decode(&mut &bytes[..]).map_err(Error::Codec),
+			None => Ok(Self::default()),
+		}
+	}
+}
+
+/// Algorithm used for proof of work.
+pub trait PowAlgorithm<B: BlockT> {
+	/// Difficulty for the algorithm.
+	type Difficulty: TotalDifficulty + Default + Encode + Decode + Ord + Clone + Copy + 'static ;
+
+	/// Get the parent block's difficulty.
+	///
+	/// This function will be called twice during the import process, so the implementation
+	/// should be properly cached.
+	fn difficulty(&self, parent: B::Hash) -> Result<Self::Difficulty, Error<B>>;
+
+	/// Get the next block's difficulty.
+	fn calc_difficulty(&self, parent: B::Hash, cur: B::Hash) -> Result<Self::Difficulty, Error<B>>;
+
+	/// Verify that the seal is valid against given pre hash when parent block is not yet imported.
+	///
+	/// None means that preliminary verify is not available for this algorithm.
+	fn preliminary_verify(
+		&self,
+		_pre_hash: &B::Hash,
+		_seal: &Seal,
+	) -> Result<Option<bool>, Error<B>> {
+		Ok(None)
+	}
+	/// Break a fork choice tie.
+	///
+	/// By default this chooses the earliest block seen. Using uniform tie
+	/// breaking algorithms will help to protect against selfish mining.
+	///
+	/// Returns if the new seal should be considered best block.
+	fn break_tie(
+		&self,
+		_own_seal: &Seal,
+		_new_seal: &Seal,
+	) -> bool {
+		false
+	}
+	/// Verify that the difficulty is valid against given seal.
+	fn verify(
+		&self,
+		parent: &BlockId<B>,
+		pre_hash: &B::Hash,
+		pre_digest: Option<&[u8]>,
+		seal: &Seal,
+		difficulty: Self::Difficulty,
+	) -> Result<bool, Error<B>>;
+}
+
+/// A block importer for PoW.
+pub struct PowBlockImport<B: BlockT, I, C, S, Algorithm, CAW> {
+	pub algorithm: Algorithm,
+	inner: I,
+	select_chain: S,
+	client: Arc<C>,
+	inherent_data_providers: sp_inherents::InherentDataProviders,
+	check_inherents_after: <<B as BlockT>::Header as HeaderT>::Number,
+	can_author_with: CAW,
+}
+
+impl<B: BlockT, I: Clone, C, S: Clone, Algorithm: Clone, CAW: Clone> Clone
+	for PowBlockImport<B, I, C, S, Algorithm, CAW>
+{
+	fn clone(&self) -> Self {
+		Self {
+			algorithm: self.algorithm.clone(),
+			inner: self.inner.clone(),
+			select_chain: self.select_chain.clone(),
+			client: self.client.clone(),
+			inherent_data_providers: self.inherent_data_providers.clone(),
+			check_inherents_after: self.check_inherents_after.clone(),
+			can_author_with: self.can_author_with.clone(),
+		}
+	}
+}
+
+impl<B, I, C, S, Algorithm, CAW> PowBlockImport<B, I, C, S, Algorithm, CAW> where
+	B: BlockT,
+	I: BlockImport<B, Transaction = sp_api::TransactionFor<C, B>> + Send + Sync,
+	I::Error: Into<ConsensusError>,
+	C: ProvideRuntimeApi<B> + Send + Sync + HeaderBackend<B> + AuxStore + ProvideCache<B> + BlockOf,
+	C::Api: BlockBuilderApi<B, Error = sp_blockchain::Error>,
+	Algorithm: PowAlgorithm<B>,
+	CAW: CanAuthorWith<B>,
+{
+	/// Create a new block import suitable to be used in PoW
+	pub fn new(
+		inner: I,
+		client: Arc<C>,
+		algorithm: Algorithm,
+		check_inherents_after: <<B as BlockT>::Header as HeaderT>::Number,
+		select_chain: S,
+		inherent_data_providers: sp_inherents::InherentDataProviders,
+		can_author_with: CAW,
+	) -> Self {
+		Self {
+			inner,
+			client,
+			algorithm,
+			check_inherents_after,
+			select_chain,
+			inherent_data_providers,
+			can_author_with,
+		}
+	}
+
+	fn check_inherents(
+		&self,
+		block: B,
+		block_id: BlockId<B>,
+		inherent_data: InherentData,
+		timestamp_now: u64,
+	) -> Result<(), Error<B>> {
+		const MAX_TIMESTAMP_DRIFT_SECS: u64 = 60;
+
+		if *block.header().number() < self.check_inherents_after {
+			return Ok(())
+		}
+
+		if let Err(e) = self.can_author_with.can_author_with(&block_id) {
+			debug!(
+				target: "pow",
+				"Skipping `check_inherents` as authoring version is not compatible: {}",
+				e,
+			);
+
+			return Ok(())
+		}
+
+		let inherent_res = self.client.runtime_api().check_inherents(
+			&block_id,
+			block,
+			inherent_data,
+		).map_err(Error::Client)?;
+
+		if !inherent_res.ok() {
+			inherent_res
+				.into_errors()
+				.try_for_each(|(i, e)| match TIError::try_from(&i, &e) {
+					Some(TIError::ValidAtTimestamp(timestamp)) => {
+						if timestamp > timestamp_now + MAX_TIMESTAMP_DRIFT_SECS {
+							return Err(Error::TooFarInFuture);
+						}
+
+						Ok(())
+					},
+					Some(TIError::Other(e)) => Err(Error::Runtime(e)),
+					None => Err(Error::CheckInherents(
+						self.inherent_data_providers.error_to_string(&i, &e)
+					)),
+				})
+		} else {
+			Ok(())
+		}
+	}
+}
+
+impl<B, I, C, S, Algorithm, CAW> BlockImport<B> for PowBlockImport<B, I, C, S, Algorithm, CAW> where
+	B: BlockT,
+	I: BlockImport<B, Transaction = sp_api::TransactionFor<C, B>> + Send + Sync,
+	I::Error: Into<ConsensusError>,
+	S: SelectChain<B>,
+	C: ProvideRuntimeApi<B> + Send + Sync + HeaderBackend<B> + AuxStore + ProvideCache<B> + BlockOf,
+	C::Api: BlockBuilderApi<B, Error = sp_blockchain::Error>,
+	Algorithm: PowAlgorithm<B>,
+	Algorithm::Difficulty: 'static,
+	CAW: CanAuthorWith<B>,
+{
+	type Error = ConsensusError;
+	type Transaction = sp_api::TransactionFor<C, B>;
+
+	fn check_block(
+		&mut self,
+		block: BlockCheckParams<B>,
+	) -> Result<ImportResult, Self::Error> {
+		self.inner.check_block(block).map_err(Into::into)
+	}
+
+	fn import_block(
+		&mut self,
+		mut block: BlockImportParams<B, Self::Transaction>,
+		new_cache: HashMap<CacheKeyId, Vec<u8>>,
+	) -> Result<ImportResult, Self::Error> {
+		let best_header = self.select_chain.best_chain()
+			.map_err(|e| format!("Fetch best chain failed via select chain: {:?}", e))?;
+		let best_hash = best_header.hash();
+
+		let parent_hash = *block.header.parent_hash();
+		let best_aux = PowAux::read::<_, B>(self.client.as_ref(), &best_hash)?;
+		let mut aux = PowAux::read::<_, B>(self.client.as_ref(), &parent_hash)?;
+
+		if let Some(inner_body) = block.body.take() {
+			let inherent_data = self.inherent_data_providers
+				.create_inherent_data().map_err(|e| e.into_string())?;
+			// :TODO: fix timestamp
+			//let timestamp_now = inherent_data.timestamp_inherent_data().map_err(|e| e.into_string())?;
+			//let timestamp_now = SystemTime::now().duration_since(UNIX_EPOCH).unwrap().as_secs();
+
+			let check_block = B::new(block.header.clone(), inner_body);
+
+			// :TODO: may check later, now we don't check the timestamp inherent data 
+			// self.check_inherents(
+			// 	check_block.clone(),
+			// 	BlockId::Hash(parent_hash),
+			// 	inherent_data,
+			// 	timestamp_now
+			// )?;
+
+			block.body = Some(check_block.deconstruct().1);
+		}
+
+		let inner_seal = fetch_seal::<B>(block.post_digests.last(), block.header.hash())?;
+
+		let intermediate = block.take_intermediate::<PowIntermediate::<Algorithm::Difficulty>>(
+			INTERMEDIATE_KEY
+		)?;
+
+		let difficulty = match intermediate.difficulty {
+			Some(difficulty) => difficulty,
+			None => self.algorithm.difficulty(parent_hash)?,
+		};
+
+		let pre_hash = block.header.hash();
+		let pre_digest = find_pre_digest::<B>(&block.header)?;
+		if !self.algorithm.verify(
+			&BlockId::hash(parent_hash),
+			&pre_hash,
+			pre_digest.as_ref().map(|v| &v[..]),
+			&inner_seal,
+			difficulty,
+		)? {
+			return Err(Error::<B>::InvalidSeal.into())
+		}
+
+		aux.difficulty = difficulty;
+		aux.total_difficulty.increment(difficulty);
+
+		let key = aux_key(&block.post_hash());
+		block.auxiliary.push((key, Some(aux.encode())));
+		if block.fork_choice.is_none() {
+			block.fork_choice = Some(ForkChoiceStrategy::Custom(
+				match aux.total_difficulty.cmp(&best_aux.total_difficulty) {
+					Ordering::Less => false,
+					Ordering::Greater => true,
+					Ordering::Equal => {
+						let best_inner_seal = fetch_seal::<B>(
+							best_header.digest().logs.last(),
+							best_hash,
+						)?;
+
+						self.algorithm.break_tie(&best_inner_seal, &inner_seal)
+					},
+				}
+			));
+		}
+
+		self.inner.import_block(block, new_cache).map_err(Into::into)
+	}
+}
+
+/// A verifier for PoW blocks.
+pub struct PowVerifier<B: BlockT, Algorithm> {
+	algorithm: Algorithm,
+	_marker: PhantomData<B>,
+}
+
+impl<B: BlockT, Algorithm> PowVerifier<B, Algorithm> {
+	pub fn new(
+		algorithm: Algorithm,
+	) -> Self {
+		Self { algorithm, _marker: PhantomData }
+	}
+
+	fn check_header(
+		&self,
+		mut header: B::Header,
+	) -> Result<(B::Header, DigestItem<B::Hash>), Error<B>> where
+		Algorithm: PowAlgorithm<B>,
+	{
+		let hash = header.hash();
+
+		let (seal, inner_seal) = match header.digest_mut().pop() {
+			Some(DigestItem::Seal(id, seal)) => {
+				if id == POW_ENGINE_ID {
+					(DigestItem::Seal(id, seal.clone()), seal)
+				} else {
+					return Err(Error::WrongEngine(id))
+				}
+			},
+			_ => return Err(Error::HeaderUnsealed(hash)),
+		};
+
+		let pre_hash = header.hash();
+
+		if !self.algorithm.preliminary_verify(&pre_hash, &inner_seal)?.unwrap_or(true) {
+			return Err(Error::FailedPreliminaryVerify);
+		}
+
+		Ok((header, seal))
+	}
+}
+
+impl<B: BlockT, Algorithm> Verifier<B> for PowVerifier<B, Algorithm> where
+	Algorithm: PowAlgorithm<B> + Send + Sync,
+	Algorithm::Difficulty: 'static,
+{
+	fn verify(
+		&mut self,
+		origin: BlockOrigin,
+		header: B::Header,
+		justification: Option<Justification>,
+		body: Option<Vec<B::Extrinsic>>,
+	) -> Result<(BlockImportParams<B, ()>, Option<Vec<(CacheKeyId, Vec<u8>)>>), String> {
+		let hash = header.hash();
+		let (checked_header, seal) = self.check_header(header)?;
+
+		let intermediate = PowIntermediate::<Algorithm::Difficulty> {
+			difficulty: None,
+		};
+
+		let mut import_block = BlockImportParams::new(origin, checked_header);
+		import_block.post_digests.push(seal);
+		import_block.body = body;
+		import_block.justification = justification;
+		import_block.intermediates.insert(
+			Cow::from(INTERMEDIATE_KEY),
+			Box::new(intermediate) as Box<dyn Any>
+		);
+		import_block.post_hash = Some(hash);
+
+		Ok((import_block, None))
+	}
+}
+
+/// Register the PoW inherent data provider, if not registered already.
+pub fn register_pow_inherent_data_provider(
+	inherent_data_providers: &InherentDataProviders,
+) -> Result<(), sp_consensus::Error> {
+	if !inherent_data_providers.has_provider(&sp_timestamp::INHERENT_IDENTIFIER) {
+		inherent_data_providers
+			.register_provider(sp_timestamp::InherentDataProvider)
+			.map_err(Into::into)
+			.map_err(sp_consensus::Error::InherentData)
+	} else {
+		Ok(())
+	}
+}
+
+/// The PoW import queue type.
+pub type PowImportQueue<B, Transaction> = BasicQueue<B, Transaction>;
+
+/// Import queue for PoW engine.
+pub fn import_queue<B, Transaction, Algorithm>(
+	block_import: BoxBlockImport<B, Transaction>,
+	justification_import: Option<BoxJustificationImport<B>>,
+	algorithm: Algorithm,
+	inherent_data_providers: InherentDataProviders,
+	spawner: &impl sp_core::traits::SpawnNamed,
+	registry: Option<&Registry>,
+) -> Result<
+	PowImportQueue<B, Transaction>,
+	sp_consensus::Error
+> where
+	B: BlockT,
+	Transaction: Send + Sync + 'static,
+	Algorithm: PowAlgorithm<B> + Clone + Send + Sync + 'static,
+{
+	register_pow_inherent_data_provider(&inherent_data_providers)?;
+
+	let verifier = PowVerifier::new(algorithm);
+
+	Ok(BasicQueue::new(
+		verifier,
+		block_import,
+		justification_import,
+		spawner,
+		registry,
+	))
+}
+
+/// Start the mining worker for PoW. This function provides the necessary helper functions that can
+/// be used to implement a miner. However, it does not do the CPU-intensive mining itself.
+///
+/// Two values are returned -- a worker, which contains functions that allows querying the current
+/// mining metadata and submitting mined blocks, and a future, which must be polled to fill in
+/// information in the worker.
+///
+/// `pre_runtime` is a parameter that allows a custom additional pre-runtime digest to be inserted
+/// for blocks being built. This can encode authorship information, or just be a graffiti.
+pub fn start_mining_worker<Block, C, S, Algorithm, E, SO, CAW>(
+	block_import: BoxBlockImport<Block, sp_api::TransactionFor<C, Block>>,
+	client: Arc<C>,
+	select_chain: S,
+	algorithm: Algorithm,
+	mut env: E,
+	mut sync_oracle: SO,
+	pre_runtime: Option<Vec<u8>>,
+	inherent_data_providers: sp_inherents::InherentDataProviders,
+	timeout: Duration,
+	build_time: Duration,
+	can_author_with: CAW,
+) -> (Arc<Mutex<MiningWorker<Block, Algorithm, C>>>, impl Future<Output = ()>) where
+	Block: BlockT,
+	C: ProvideRuntimeApi<Block> + BlockchainEvents<Block> + 'static,
+	S: SelectChain<Block> + 'static,
+	Algorithm: PowAlgorithm<Block> + Clone,
+	Algorithm::Difficulty: 'static,
+	E: Environment<Block> + Send + Sync + 'static,
+	E::Error: std::fmt::Debug,
+	E::Proposer: Proposer<Block, Transaction = sp_api::TransactionFor<C, Block>>,
+	SO: SyncOracle + Clone + Send + Sync + 'static,
+	CAW: CanAuthorWith<Block> + Clone + Send + 'static,
+{
+	if let Err(_) = register_pow_inherent_data_provider(&inherent_data_providers) {
+		warn!("Registering inherent data provider for timestamp failed");
+	}
+
+	let timer = UntilImportedOrTimeout::new(client.import_notification_stream(), timeout);
+	let worker = Arc::new(Mutex::new(MiningWorker::<Block, Algorithm, C> {
+		build: None,
+		algorithm: algorithm.clone(),
+		block_import,
+	}));
+	let worker_ret = worker.clone();
+
+	let task = timer.for_each(move |()| {
+		let worker = worker.clone();
+
+		if sync_oracle.is_major_syncing() {
+			debug!(target: "pow", "Skipping proposal due to sync.");
+			worker.lock().on_major_syncing();
+			return Either::Left(future::ready(()))
+		}
+
+		let best_header = match select_chain.best_chain() {
+			Ok(x) => x,
+			Err(err) => {
+				warn!(
+					target: "pow",
+					"Unable to pull new block for authoring. \
+					 Select best chain error: {:?}",
+					err
+				);
+				return Either::Left(future::ready(()))
+			},
+		};
+		let best_hash = best_header.hash();
+
+		if let Err(err) = can_author_with.can_author_with(&BlockId::Hash(best_hash)) {
+			warn!(
+				target: "pow",
+				"Skipping proposal `can_author_with` returned: {} \
+				 Probably a node update is required!",
+				err,
+			);
+			return Either::Left(future::ready(()))
+		}
+
+		if worker.lock().best_hash() == Some(best_hash) {
+			return Either::Left(future::ready(()))
+		}
+
+		// The worker is locked for the duration of the whole proposing period. Within this period,
+		// the mining target is outdated and useless anyway.
+		let difficulty = match algorithm.calc_difficulty(*best_header.parent_hash(), best_hash) {
+			Ok(x) => x,
+			Err(err) => {
+				warn!(
+					target: "pow",
+					"Unable to propose new block for authoring. \
+					 Calculate difficulty failed: {:?}",
+					err,
+				);
+				return Either::Left(future::ready(()))
+			},
+		};
+
+		let awaiting_proposer = env.init(&best_header);
+		let inherent_data = match inherent_data_providers.create_inherent_data() {
+			Ok(x) => x,
+			Err(err) => {
+				warn!(
+					target: "pow",
+					"Unable to propose new block for authoring. \
+					 Creating inherent data failed: {:?}",
+					err,
+				);
+				return Either::Left(future::ready(()))
+			},
+		};
+		let mut inherent_digest = Digest::<Block::Hash>::default();
+		if let Some(pre_runtime) = &pre_runtime {
+			inherent_digest.push(DigestItem::PreRuntime(POW_ENGINE_ID, pre_runtime.to_vec()));
+		}
+
+		let pre_runtime = pre_runtime.clone();
+
+		Either::Right(async move {
+			let proposer = match awaiting_proposer.await {
+				Ok(x) => x,
+				Err(err) => {
+					warn!(
+						target: "pow",
+						"Unable to propose new block for authoring. \
+						 Creating proposer failed: {:?}",
+						err,
+					);
+					return
+				},
+			};
+
+			let proposal = match proposer.propose(
+				inherent_data.clone(),
+				inherent_digest,
+				build_time.clone(),
+				RecordProof::No,
+			).await {
+				Ok(x) => x,
+				Err(err) => {
+					warn!(
+						target: "pow",
+						"Unable to propose new block for authoring. \
+						 Creating proposal failed: {:?}",
+						err,
+					);
+					return
+				},
+			};
+
+			let build = MiningBuild::<Block, Algorithm, C> {
+				metadata: MiningMetadata {
+					best_hash,
+					pre_hash: proposal.block.header().hash(),
+					pre_runtime: pre_runtime.clone(),
+					difficulty,
+					number: (*proposal.block.header().number()),
+				},
+				proposal,
+			};
+
+			worker.lock().on_build(build);
+		})
+	});
+
+	(worker_ret, task)
+}
+
+/// Find PoW pre-runtime.
+fn find_pre_digest<B: BlockT>(header: &B::Header) -> Result<Option<Vec<u8>>, Error<B>> {
+	let mut pre_digest: Option<_> = None;
+	for log in header.digest().logs() {
+		trace!(target: "pow", "Checking log {:?}, looking for pre runtime digest", log);
+		match (log, pre_digest.is_some()) {
+			(DigestItem::PreRuntime(POW_ENGINE_ID, _), true) => {
+				return Err(Error::MultiplePreRuntimeDigests)
+			},
+			(DigestItem::PreRuntime(POW_ENGINE_ID, v), false) => {
+				pre_digest = Some(v.clone());
+			},
+			(_, _) => trace!(target: "pow", "Ignoring digest not meant for us"),
+		}
+	}
+
+	Ok(pre_digest)
+}
+
+/// Fetch PoW seal.
+pub fn fetch_seal<B: BlockT>(
+	digest: Option<&DigestItem<B::Hash>>,
+	hash: B::Hash,
+) -> Result<Vec<u8>, Error<B>> {
+	match digest {
+		Some(DigestItem::Seal(id, seal)) => {
+			if id == &POW_ENGINE_ID {
+				Ok(seal.clone())
+			} else {
+				return Err(Error::<B>::WrongEngine(*id).into())
+			}
+		},
+		_ => return Err(Error::<B>::HeaderUnsealed(hash).into()),
+	}
+}
diff --git a/client/consensus/consensus-pow/src/worker.rs b/client/consensus/consensus-pow/src/worker.rs
new file mode 100644
index 00000000..e543b9e9
--- /dev/null
+++ b/client/consensus/consensus-pow/src/worker.rs
@@ -0,0 +1,215 @@
+// This file is part of Substrate.
+
+// Copyright (C) 2020-2021 Parity Technologies (UK) Ltd.
+// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+use std::{pin::Pin, time::Duration, collections::HashMap, any::Any, borrow::Cow};
+use sc_client_api::ImportNotifications;
+use sp_runtime::{DigestItem, traits::Block as BlockT, generic::BlockId, traits::NumberFor};
+use sp_consensus::{Proposal, BlockOrigin, BlockImportParams, import_queue::BoxBlockImport};
+use futures::{prelude::*, task::{Context, Poll}};
+use futures_timer::Delay;
+use log::*;
+
+use crate::{INTERMEDIATE_KEY, POW_ENGINE_ID, Seal, PowAlgorithm, PowIntermediate};
+
+/// Mining metadata. This is the information needed to start an actual mining loop.
+#[derive(Clone, Eq, PartialEq)]
+pub struct MiningMetadata<H, D, B: BlockT> {
+	/// Currently known best hash which the pre-hash is built on.
+	pub best_hash: H,
+	/// Mining pre-hash.
+	pub pre_hash: H,
+	/// Pre-runtime digest item.
+	pub pre_runtime: Option<Vec<u8>>,
+	/// Mining target difficulty.
+	pub difficulty: D,
+	/// block number
+	pub number: NumberFor<B>,
+}
+
+/// A build of mining, containing the metadata and the block proposal.
+pub struct MiningBuild<Block: BlockT, Algorithm: PowAlgorithm<Block>, C: sp_api::ProvideRuntimeApi<Block>> {
+	/// Mining metadata.
+	pub metadata: MiningMetadata<Block::Hash, Algorithm::Difficulty, Block>,
+	/// Mining proposal.
+	pub proposal: Proposal<Block, sp_api::TransactionFor<C, Block>>,
+}
+
+/// Mining worker that exposes structs to query the current mining build and submit mined blocks.
+pub struct MiningWorker<Block: BlockT, Algorithm: PowAlgorithm<Block>, C: sp_api::ProvideRuntimeApi<Block>> {
+	pub(crate) build: Option<MiningBuild<Block, Algorithm, C>>,
+	pub(crate) algorithm: Algorithm,
+	pub(crate) block_import: BoxBlockImport<Block, sp_api::TransactionFor<C, Block>>,
+}
+
+impl<Block, Algorithm, C> MiningWorker<Block, Algorithm, C> where
+	Block: BlockT,
+	C: sp_api::ProvideRuntimeApi<Block>,
+	Algorithm: PowAlgorithm<Block>,
+	Algorithm::Difficulty: 'static,
+{
+	/// Get the current best hash. `None` if the worker has just started or the client is doing
+	/// major syncing.
+	pub fn best_hash(&self) -> Option<Block::Hash> {
+		self.build.as_ref().map(|b| b.metadata.best_hash)
+	}
+
+	pub(crate) fn on_major_syncing(&mut self) {
+		self.build = None;
+	}
+
+	pub(crate) fn on_build(
+		&mut self,
+		build: MiningBuild<Block, Algorithm, C>,
+	) {
+		self.build = Some(build);
+	}
+
+	/// Get a copy of the current mining metadata, if available.
+	pub fn metadata(&self) -> Option<MiningMetadata<Block::Hash, Algorithm::Difficulty, Block>> {
+		self.build.as_ref().map(|b| b.metadata.clone())
+	}
+
+	/// Submit a mined seal. The seal will be validated again. Returns true if the submission is
+	/// successful.
+	pub fn submit(&mut self, seal: Seal) -> bool {
+		if let Some(build) = self.build.take() {
+			match self.algorithm.verify(
+				&BlockId::Hash(build.metadata.best_hash),
+				&build.metadata.pre_hash,
+				build.metadata.pre_runtime.as_ref().map(|v| &v[..]),
+				&seal,
+				build.metadata.difficulty,
+			) {
+				Ok(true) => (),
+				Ok(false) => {
+					warn!(
+						target: "pow",
+						"Unable to import mined block: seal is invalid",
+					);
+					return false
+				},
+				Err(err) => {
+					warn!(
+						target: "pow",
+						"Unable to import mined block: {:?}",
+						err,
+					);
+					return false
+				},
+			}
+
+			let seal = DigestItem::Seal(POW_ENGINE_ID, seal);
+			let (header, body) = build.proposal.block.deconstruct();
+
+			let mut import_block = BlockImportParams::new(BlockOrigin::Own, header);
+			import_block.post_digests.push(seal);
+			import_block.body = Some(body);
+			import_block.storage_changes = Some(build.proposal.storage_changes);
+
+			let intermediate = PowIntermediate::<Algorithm::Difficulty> {
+				difficulty: Some(build.metadata.difficulty),
+			};
+
+			import_block.intermediates.insert(
+				Cow::from(INTERMEDIATE_KEY),
+				Box::new(intermediate) as Box<dyn Any>
+			);
+
+			match self.block_import.import_block(import_block, HashMap::default()) {
+				Ok(_) => {
+					info!(
+						target: "pow",
+						"✅ Successfully mined block on top of: {}",
+						build.metadata.best_hash
+					);
+					true
+				},
+				Err(err) => {
+					warn!(
+						target: "pow",
+						"Unable to import mined block: {:?}",
+						err,
+					);
+					false
+				},
+			}
+		} else {
+			warn!(
+				target: "pow",
+				"Unable to import mined block: build does not exist",
+			);
+			false
+		}
+	}
+}
+
+/// A stream that waits for a block import or timeout.
+pub struct UntilImportedOrTimeout<Block: BlockT> {
+	import_notifications: ImportNotifications<Block>,
+	timeout: Duration,
+	inner_delay: Option<Delay>,
+}
+
+impl<Block: BlockT> UntilImportedOrTimeout<Block> {
+	/// Create a new stream using the given import notification and timeout duration.
+	pub fn new(
+		import_notifications: ImportNotifications<Block>,
+		timeout: Duration,
+	) -> Self {
+		Self {
+			import_notifications,
+			timeout,
+			inner_delay: None,
+		}
+	}
+}
+
+impl<Block: BlockT> Stream for UntilImportedOrTimeout<Block> {
+	type Item = ();
+
+	fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context) -> Poll<Option<()>> {
+		let mut fire = false;
+
+		loop {
+			match Stream::poll_next(Pin::new(&mut self.import_notifications), cx) {
+				Poll::Pending => break,
+				Poll::Ready(Some(_)) => {
+					fire = true;
+				},
+				Poll::Ready(None) => return Poll::Ready(None),
+			}
+		}
+
+		let timeout = self.timeout.clone();
+		let inner_delay = self.inner_delay.get_or_insert_with(|| Delay::new(timeout));
+
+		match Future::poll(Pin::new(inner_delay), cx) {
+			Poll::Pending => (),
+			Poll::Ready(()) => {
+				fire = true;
+			},
+		}
+
+		if fire {
+			self.inner_delay = None;
+			Poll::Ready(Some(()))
+		} else {
+			Poll::Pending
+		}
+	}
+}
diff --git a/client/consensus/ethash/Cargo.toml b/client/consensus/ethash/Cargo.toml
new file mode 100644
index 00000000..1628bd58
--- /dev/null
+++ b/client/consensus/ethash/Cargo.toml
@@ -0,0 +1,36 @@
+[package]
+description = "Parity Ethereum Ethash & ProgPoW Implementations"
+name = "ethash"
+version = "1.12.0"
+authors = ["Parity Technologies <admin@parity.io>"]
+
+[dependencies]
+crunchy = "0.1.0"
+either = "1.0.0"
+ethereum-types = "0.9.2"
+keccak-hash = "0.5.0"
+tiny-keccak = "2.0.2"
+log = "0.4"
+memmap = "0.6"
+parking_lot = "0.11.1"
+primal = "0.2.3"
+
+[dev-dependencies]
+#criterion = "0.2"
+rustc-hex = "1.0"
+serde_json = "1.0"
+tempdir = "0.3"
+
+[features]
+default = []
+bench = []
+
+[[bench]]
+name = "basic"
+harness = false
+required-features = ['bench']
+
+[[bench]]
+name = "progpow"
+harness = false
+required-features = ['bench']
diff --git a/client/consensus/ethash/benches/basic.rs b/client/consensus/ethash/benches/basic.rs
new file mode 100644
index 00000000..8e60a698
--- /dev/null
+++ b/client/consensus/ethash/benches/basic.rs
@@ -0,0 +1,126 @@
+// Copyright 2015-2020 Parity Technologies (UK) Ltd.
+// This file is part of OpenEthereum.
+
+// OpenEthereum is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// OpenEthereum is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with OpenEthereum.  If not, see <http://www.gnu.org/licenses/>.
+
+#[macro_use]
+extern crate criterion;
+extern crate ethash;
+
+use criterion::Criterion;
+use ethash::{NodeCacheBuilder, OptimizeFor};
+
+const HASH: [u8; 32] = [
+    0xf5, 0x7e, 0x6f, 0x3a, 0xcf, 0xc0, 0xdd, 0x4b, 0x5b, 0xf2, 0xbe, 0xe4, 0x0a, 0xb3, 0x35, 0x8a,
+    0xa6, 0x87, 0x73, 0xa8, 0xd0, 0x9f, 0x5e, 0x59, 0x5e, 0xab, 0x55, 0x94, 0x05, 0x52, 0x7d, 0x72,
+];
+const NONCE: u64 = 0xd7b3ac70a301a249;
+
+criterion_group!(
+    basic,
+    bench_light_compute_memmap,
+    bench_light_compute_memory,
+    bench_light_new_round_trip_memmap,
+    bench_light_new_round_trip_memory,
+    bench_light_from_file_round_trip_memory,
+    bench_light_from_file_round_trip_memmap
+);
+criterion_main!(basic);
+
+fn bench_light_compute_memmap(b: &mut Criterion) {
+    use std::env;
+
+    let builder = NodeCacheBuilder::new(OptimizeFor::Memory, u64::max_value());
+    let light = builder.light(&env::temp_dir(), 486382);
+
+    b.bench_function("bench_light_compute_memmap", move |b| {
+        b.iter(|| light.compute(&HASH, NONCE, u64::max_value()))
+    });
+}
+
+fn bench_light_compute_memory(b: &mut Criterion) {
+    use std::env;
+
+    let builder = NodeCacheBuilder::new(OptimizeFor::Cpu, u64::max_value());
+    let light = builder.light(&env::temp_dir(), 486382);
+
+    b.bench_function("bench_light_compute_memmap", move |b| {
+        b.iter(|| light.compute(&HASH, NONCE, u64::max_value()))
+    });
+}
+
+fn bench_light_new_round_trip_memmap(b: &mut Criterion) {
+    use std::env;
+
+    b.bench_function("bench_light_compute_memmap", move |b| {
+        b.iter(|| {
+            let builder = NodeCacheBuilder::new(OptimizeFor::Memory, u64::max_value());
+            let light = builder.light(&env::temp_dir(), 486382);
+            light.compute(&HASH, NONCE, u64::max_value());
+        })
+    });
+}
+
+fn bench_light_new_round_trip_memory(b: &mut Criterion) {
+    use std::env;
+
+    b.bench_function("bench_light_compute_memmap", move |b| {
+        b.iter(|| {
+            let builder = NodeCacheBuilder::new(OptimizeFor::Cpu, u64::max_value());
+            let light = builder.light(&env::temp_dir(), 486382);
+            light.compute(&HASH, NONCE, u64::max_value());
+        })
+    });
+}
+
+fn bench_light_from_file_round_trip_memory(b: &mut Criterion) {
+    use std::env;
+
+    let dir = env::temp_dir();
+    let height = 486382;
+    {
+        let builder = NodeCacheBuilder::new(OptimizeFor::Cpu, u64::max_value());
+        let mut dummy = builder.light(&dir, height);
+        dummy.to_file().unwrap();
+    }
+
+    b.bench_function("bench_light_compute_memmap", move |b| {
+        b.iter(|| {
+            let builder = NodeCacheBuilder::new(OptimizeFor::Cpu, u64::max_value());
+            let light = builder.light_from_file(&dir, 486382).unwrap();
+            light.compute(&HASH, NONCE, u64::max_value());
+        })
+    });
+}
+
+fn bench_light_from_file_round_trip_memmap(b: &mut Criterion) {
+    use std::env;
+
+    let dir = env::temp_dir();
+    let height = 486382;
+
+    {
+        let builder = NodeCacheBuilder::new(OptimizeFor::Memory, u64::max_value());
+        let mut dummy = builder.light(&dir, height);
+        dummy.to_file().unwrap();
+    }
+
+    b.bench_function("bench_light_compute_memmap", move |b| {
+        b.iter(|| {
+            let builder = NodeCacheBuilder::new(OptimizeFor::Memory, u64::max_value());
+            let light = builder.light_from_file(&dir, 486382).unwrap();
+            light.compute(&HASH, NONCE, u64::max_value());
+        })
+    });
+}
diff --git a/client/consensus/ethash/benches/progpow.rs b/client/consensus/ethash/benches/progpow.rs
new file mode 100644
index 00000000..939818e7
--- /dev/null
+++ b/client/consensus/ethash/benches/progpow.rs
@@ -0,0 +1,77 @@
+#[macro_use]
+extern crate criterion;
+extern crate ethash;
+extern crate rustc_hex;
+extern crate tempdir;
+
+use criterion::Criterion;
+use ethash::progpow;
+
+use ethash::{compute::light_compute, NodeCacheBuilder, OptimizeFor};
+use rustc_hex::FromHex;
+use tempdir::TempDir;
+
+fn bench_hashimoto_light(c: &mut Criterion) {
+    let builder = NodeCacheBuilder::new(OptimizeFor::Memory, u64::max_value());
+    let tempdir = TempDir::new("").unwrap();
+    let light = builder.light(&tempdir.path(), 1);
+    let h = FromHex::from_hex("c9149cc0386e689d789a1c2f3d5d169a61a6218ed30e74414dc736e442ef3d1f")
+        .unwrap();
+    let mut hash = [0; 32];
+    hash.copy_from_slice(&h);
+
+    c.bench_function("hashimoto_light", move |b| {
+        b.iter(|| light_compute(&light, &hash, 0))
+    });
+}
+
+fn bench_progpow_light(c: &mut Criterion) {
+    let builder = NodeCacheBuilder::new(OptimizeFor::Memory, u64::max_value());
+    let tempdir = TempDir::new("").unwrap();
+    let cache = builder.new_cache(tempdir.into_path(), 0);
+
+    let h = FromHex::from_hex("c9149cc0386e689d789a1c2f3d5d169a61a6218ed30e74414dc736e442ef3d1f")
+        .unwrap();
+    let mut hash = [0; 32];
+    hash.copy_from_slice(&h);
+
+    c.bench_function("progpow_light", move |b| {
+        b.iter(|| {
+            let c_dag = progpow::generate_cdag(cache.as_ref());
+            progpow::progpow(hash, 0, 0, cache.as_ref(), &c_dag);
+        })
+    });
+}
+
+fn bench_progpow_optimal_light(c: &mut Criterion) {
+    let builder = NodeCacheBuilder::new(OptimizeFor::Memory, u64::max_value());
+    let tempdir = TempDir::new("").unwrap();
+    let cache = builder.new_cache(tempdir.into_path(), 0);
+    let c_dag = progpow::generate_cdag(cache.as_ref());
+
+    let h = FromHex::from_hex("c9149cc0386e689d789a1c2f3d5d169a61a6218ed30e74414dc736e442ef3d1f")
+        .unwrap();
+    let mut hash = [0; 32];
+    hash.copy_from_slice(&h);
+
+    c.bench_function("progpow_optimal_light", move |b| {
+        b.iter(|| {
+            progpow::progpow(hash, 0, 0, cache.as_ref(), &c_dag);
+        })
+    });
+}
+
+fn bench_keccak_f800_long(c: &mut Criterion) {
+    c.bench_function("keccak_f800_long(0, 0, 0)", |b| {
+        b.iter(|| progpow::keccak_f800_long([0; 32], 0, [0; 8]))
+    });
+}
+
+criterion_group!(
+    benches,
+    bench_hashimoto_light,
+    bench_progpow_light,
+    bench_progpow_optimal_light,
+    bench_keccak_f800_long,
+);
+criterion_main!(benches);
diff --git a/client/consensus/ethash/res/progpow_testvectors.json b/client/consensus/ethash/res/progpow_testvectors.json
new file mode 100644
index 00000000..2939f710
--- /dev/null
+++ b/client/consensus/ethash/res/progpow_testvectors.json
@@ -0,0 +1,86 @@
+[
+  [
+    0,
+    "0000000000000000000000000000000000000000000000000000000000000000",
+    "0000000000000000",
+    "faeb1be51075b03a4ff44b335067951ead07a3b078539ace76fd56fc410557a3",
+    "63155f732f2bf556967f906155b510c917e48e99685ead76ea83f4eca03ab12b"
+  ],
+  [
+    49,
+    "63155f732f2bf556967f906155b510c917e48e99685ead76ea83f4eca03ab12b",
+    "0000000006ff2c47",
+    "c789c1180f890ec555ff42042913465481e8e6bc512cb981e1c1108dc3f2227d",
+    "9e7248f20914913a73d80a70174c331b1d34f260535ac3631d770e656b5dd922"
+  ],
+  [
+    50,
+    "9e7248f20914913a73d80a70174c331b1d34f260535ac3631d770e656b5dd922",
+    "00000000076e482e",
+    "c7340542c2a06b3a7dc7222635f7cd402abf8b528ae971ddac6bbe2b0c7cb518",
+    "de37e1824c86d35d154cf65a88de6d9286aec4f7f10c3fc9f0fa1bcc2687188d"
+  ],
+  [
+    99,
+    "de37e1824c86d35d154cf65a88de6d9286aec4f7f10c3fc9f0fa1bcc2687188d",
+    "000000003917afab",
+    "f5e60b2c5bfddd136167a30cbc3c8dbdbd15a512257dee7964e0bc6daa9f8ba7",
+    "ac7b55e801511b77e11d52e9599206101550144525b5679f2dab19386f23dcce"
+  ],
+  [
+    29950,
+    "ac7b55e801511b77e11d52e9599206101550144525b5679f2dab19386f23dcce",
+    "005d409dbc23a62a",
+    "07393d15805eb08ee6fc6cb3ad4ad1010533bd0ff92d6006850246829f18fd6e",
+    "e43d7e0bdc8a4a3f6e291a5ed790b9fa1a0948a2b9e33c844888690847de19f5"
+  ],
+  [
+    29999,
+    "e43d7e0bdc8a4a3f6e291a5ed790b9fa1a0948a2b9e33c844888690847de19f5",
+    "005db5fa4c2a3d03",
+    "7551bddf977491da2f6cfc1679299544b23483e8f8ee0931c4c16a796558a0b8",
+    "d34519f72c97cae8892c277776259db3320820cb5279a299d0ef1e155e5c6454"
+  ],
+  [
+    30000,
+    "d34519f72c97cae8892c277776259db3320820cb5279a299d0ef1e155e5c6454",
+    "005db8607994ff30",
+    "f1c2c7c32266af9635462e6ce1c98ebe4e7e3ecab7a38aaabfbf2e731e0fbff4",
+    "8b6ce5da0b06d18db7bd8492d9e5717f8b53e7e098d9fef7886d58a6e913ef64"
+  ],
+  [
+    30049,
+    "8b6ce5da0b06d18db7bd8492d9e5717f8b53e7e098d9fef7886d58a6e913ef64",
+    "005e2e215a8ca2e7",
+    "57fe6a9fbf920b4e91deeb66cb0efa971e08229d1a160330e08da54af0689add",
+    "c2c46173481b9ced61123d2e293b42ede5a1b323210eb2a684df0874ffe09047"
+  ],
+  [
+    30050,
+    "c2c46173481b9ced61123d2e293b42ede5a1b323210eb2a684df0874ffe09047",
+    "005e30899481055e",
+    "ba30c61cc5a2c74a5ecaf505965140a08f24a296d687e78720f0b48baf712f2d",
+    "ea42197eb2ba79c63cb5e655b8b1f612c5f08aae1a49ff236795a3516d87bc71"
+  ],
+  [
+    30099,
+    "ea42197eb2ba79c63cb5e655b8b1f612c5f08aae1a49ff236795a3516d87bc71",
+    "005ea6aef136f88b",
+    "cfd5e46048cd133d40f261fe8704e51d3f497fc14203ac6a9ef6a0841780b1cd",
+    "49e15ba4bf501ce8fe8876101c808e24c69a859be15de554bf85dbc095491bd6"
+  ],
+  [
+    59950,
+    "49e15ba4bf501ce8fe8876101c808e24c69a859be15de554bf85dbc095491bd6",
+    "02ebe0503bd7b1da",
+    "21511fbaa31fb9f5fc4998a754e97b3083a866f4de86fa7500a633346f56d773",
+    "f5c50ba5c0d6210ddb16250ec3efda178de857b2b1703d8d5403bd0f848e19cf"
+  ],
+  [
+    59999,
+    "f5c50ba5c0d6210ddb16250ec3efda178de857b2b1703d8d5403bd0f848e19cf",
+    "02edb6275bd221e3",
+    "653eda37d337e39d311d22be9bbd3458d3abee4e643bee4a7280a6d08106ef98",
+    "341562d10d4afb706ec2c8d5537cb0c810de02b4ebb0a0eea5ae335af6fb2e88"
+  ]
+]
diff --git a/client/consensus/ethash/src/cache.rs b/client/consensus/ethash/src/cache.rs
new file mode 100644
index 00000000..38b2b2de
--- /dev/null
+++ b/client/consensus/ethash/src/cache.rs
@@ -0,0 +1,356 @@
+// Copyright 2015-2020 Parity Technologies (UK) Ltd.
+// This file is part of OpenEthereum.
+
+// OpenEthereum is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// OpenEthereum is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with OpenEthereum.  If not, see <http://www.gnu.org/licenses/>.
+
+use compute::Light;
+use either::Either;
+use keccak::{keccak_512, H256};
+use memmap::MmapMut;
+use parking_lot::Mutex;
+use seed_compute::SeedHashCompute;
+
+use shared::{epoch, get_cache_size, to_hex, Node, ETHASH_CACHE_ROUNDS, NODE_BYTES};
+
+use std::{
+    borrow::Cow,
+    fs,
+    io::{self, Read, Write},
+    path::{Path, PathBuf},
+    slice,
+    sync::Arc,
+};
+
+type Cache = Either<Vec<Node>, MmapMut>;
+
+#[derive(PartialEq, Eq, Debug, Clone, Copy)]
+pub enum OptimizeFor {
+    Cpu,
+    Memory,
+}
+
+impl Default for OptimizeFor {
+    fn default() -> Self {
+        OptimizeFor::Cpu
+    }
+}
+
+fn byte_size(cache: &Cache) -> usize {
+    use self::Either::{Left, Right};
+
+    match *cache {
+        Left(ref vec) => vec.len() * NODE_BYTES,
+        Right(ref mmap) => mmap.len(),
+    }
+}
+
+fn new_buffer(path: &Path, num_nodes: usize, ident: &H256, optimize_for: OptimizeFor) -> Cache {
+    let memmap = match optimize_for {
+        OptimizeFor::Cpu => None,
+        OptimizeFor::Memory => make_memmapped_cache(path, num_nodes, ident).ok(),
+    };
+
+    memmap
+        .map(Either::Right)
+        .unwrap_or_else(|| Either::Left(make_memory_cache(num_nodes, ident)))
+}
+
+#[derive(Clone)]
+pub struct NodeCacheBuilder {
+    // TODO: Remove this locking and just use an `Rc`?
+    seedhash: Arc<Mutex<SeedHashCompute>>,
+    optimize_for: OptimizeFor,
+    progpow_transition: u64,
+}
+
+// TODO: Abstract the "optimize for" logic
+pub struct NodeCache {
+    builder: NodeCacheBuilder,
+    cache_dir: Cow<'static, Path>,
+    cache_path: PathBuf,
+    epoch: u64,
+    cache: Cache,
+}
+
+impl NodeCacheBuilder {
+    pub fn light(&self, cache_dir: &Path, block_number: u64) -> Light {
+        Light::new_with_builder(self, cache_dir, block_number, self.progpow_transition)
+    }
+
+    pub fn light_from_file(&self, cache_dir: &Path, block_number: u64) -> io::Result<Light> {
+        Light::from_file_with_builder(self, cache_dir, block_number, self.progpow_transition)
+    }
+
+    pub fn new<T: Into<Option<OptimizeFor>>>(optimize_for: T, progpow_transition: u64) -> Self {
+        NodeCacheBuilder {
+            seedhash: Arc::new(Mutex::new(SeedHashCompute::default())),
+            optimize_for: optimize_for.into().unwrap_or_default(),
+            progpow_transition,
+        }
+    }
+
+    fn block_number_to_ident(&self, block_number: u64) -> H256 {
+        self.seedhash.lock().hash_block_number(block_number)
+    }
+
+    fn epoch_to_ident(&self, epoch: u64) -> H256 {
+        self.seedhash.lock().hash_epoch(epoch)
+    }
+
+    pub fn from_file<P: Into<Cow<'static, Path>>>(
+        &self,
+        cache_dir: P,
+        block_number: u64,
+    ) -> io::Result<NodeCache> {
+        let cache_dir = cache_dir.into();
+        let ident = self.block_number_to_ident(block_number);
+
+        let path = cache_path(cache_dir.as_ref(), &ident);
+
+        let cache = cache_from_path(&path, self.optimize_for)?;
+        let expected_cache_size = get_cache_size(block_number);
+
+        if byte_size(&cache) == expected_cache_size {
+            Ok(NodeCache {
+                builder: self.clone(),
+                epoch: epoch(block_number),
+                cache_dir: cache_dir,
+                cache_path: path,
+                cache: cache,
+            })
+        } else {
+            Err(io::Error::new(
+                io::ErrorKind::InvalidData,
+                "Node cache is of incorrect size",
+            ))
+        }
+    }
+
+    pub fn new_cache<P: Into<Cow<'static, Path>>>(
+        &self,
+        cache_dir: P,
+        block_number: u64,
+    ) -> NodeCache {
+        let cache_dir = cache_dir.into();
+        let ident = self.block_number_to_ident(block_number);
+
+        let cache_size = get_cache_size(block_number);
+
+        // We use `debug_assert` since it is impossible for `get_cache_size` to return an unaligned
+        // value with the current implementation. If the implementation changes, CI will catch it.
+        debug_assert!(cache_size % NODE_BYTES == 0, "Unaligned cache size");
+        let num_nodes = cache_size / NODE_BYTES;
+
+        let path = cache_path(cache_dir.as_ref(), &ident);
+        let nodes = new_buffer(&path, num_nodes, &ident, self.optimize_for);
+
+        NodeCache {
+            builder: self.clone(),
+            epoch: epoch(block_number),
+            cache_dir: cache_dir.into(),
+            cache_path: path,
+            cache: nodes,
+        }
+    }
+}
+
+impl NodeCache {
+    pub fn cache_path(&self) -> &Path {
+        &self.cache_path
+    }
+
+    pub fn flush(&mut self) -> io::Result<()> {
+        if let Some(last) = self
+            .epoch
+            .checked_sub(2)
+            .map(|ep| cache_path(self.cache_dir.as_ref(), &self.builder.epoch_to_ident(ep)))
+        {
+            fs::remove_file(last).unwrap_or_else(|error| match error.kind() {
+                io::ErrorKind::NotFound => (),
+                _ => warn!("Error removing stale DAG cache: {:?}", error),
+            });
+        }
+
+        consume_cache(&mut self.cache, &self.cache_path)
+    }
+}
+
+fn make_memmapped_cache(path: &Path, num_nodes: usize, ident: &H256) -> io::Result<MmapMut> {
+    use std::fs::OpenOptions;
+
+    let file = OpenOptions::new()
+        .read(true)
+        .write(true)
+        .create(true)
+        .open(&path)?;
+    file.set_len((num_nodes * NODE_BYTES) as _)?;
+
+    let mut memmap = unsafe { MmapMut::map_mut(&file)? };
+
+    unsafe { initialize_memory(memmap.as_mut_ptr() as *mut Node, num_nodes, ident) };
+
+    Ok(memmap)
+}
+
+fn make_memory_cache(num_nodes: usize, ident: &H256) -> Vec<Node> {
+    let mut nodes: Vec<Node> = Vec::with_capacity(num_nodes);
+    // Use uninit instead of unnecessarily writing `size_of::<Node>() * num_nodes` 0s
+    unsafe {
+        initialize_memory(nodes.as_mut_ptr(), num_nodes, ident);
+        nodes.set_len(num_nodes);
+    }
+
+    nodes
+}
+
+fn cache_path<'a, P: Into<Cow<'a, Path>>>(path: P, ident: &H256) -> PathBuf {
+    let mut buf = path.into().into_owned();
+    buf.push(to_hex(ident));
+    buf
+}
+
+fn consume_cache(cache: &mut Cache, path: &Path) -> io::Result<()> {
+    use std::fs::OpenOptions;
+
+    match *cache {
+        Either::Left(ref mut vec) => {
+            let mut file = OpenOptions::new()
+                .read(true)
+                .write(true)
+                .create(true)
+                .open(&path)?;
+
+            let buf = unsafe {
+                slice::from_raw_parts_mut(vec.as_mut_ptr() as *mut u8, vec.len() * NODE_BYTES)
+            };
+
+            file.write_all(buf).map(|_| ())
+        }
+        Either::Right(ref mmap) => mmap.flush(),
+    }
+}
+
+fn cache_from_path(path: &Path, optimize_for: OptimizeFor) -> io::Result<Cache> {
+    let memmap = match optimize_for {
+        OptimizeFor::Cpu => None,
+        OptimizeFor::Memory => {
+            let file = fs::OpenOptions::new()
+                .read(true)
+                .write(true)
+                .create(true)
+                .open(path)?;
+            unsafe { MmapMut::map_mut(&file).ok() }
+        }
+    };
+
+    memmap
+        .map(Either::Right)
+        .ok_or(())
+        .or_else(|_| read_from_path(path).map(Either::Left))
+}
+
+fn read_from_path(path: &Path) -> io::Result<Vec<Node>> {
+    use std::{fs::File, mem};
+
+    let mut file = File::open(path)?;
+
+    let mut nodes: Vec<u8> = Vec::with_capacity(
+        file.metadata()
+            .map(|m| m.len() as _)
+            .unwrap_or(NODE_BYTES * 1_000_000),
+    );
+    file.read_to_end(&mut nodes)?;
+
+    nodes.shrink_to_fit();
+
+    if nodes.len() % NODE_BYTES != 0 || nodes.capacity() % NODE_BYTES != 0 {
+        return Err(io::Error::new(
+            io::ErrorKind::Other,
+            "Node cache is not a multiple of node size",
+        ));
+    }
+
+    let out: Vec<Node> = unsafe {
+        Vec::from_raw_parts(
+            nodes.as_mut_ptr() as *mut _,
+            nodes.len() / NODE_BYTES,
+            nodes.capacity() / NODE_BYTES,
+        )
+    };
+
+    mem::forget(nodes);
+
+    Ok(out)
+}
+
+impl AsRef<[Node]> for NodeCache {
+    fn as_ref(&self) -> &[Node] {
+        match self.cache {
+            Either::Left(ref vec) => vec,
+            Either::Right(ref mmap) => unsafe {
+                let bytes = mmap.as_ptr();
+                // This isn't a safety issue, so we can keep this a debug lint. We don't care about
+                // people manually messing with the files unless it can cause unsafety, but if we're
+                // generating incorrect files then we want to catch that in CI.
+                debug_assert_eq!(mmap.len() % NODE_BYTES, 0);
+                slice::from_raw_parts(bytes as _, mmap.len() / NODE_BYTES)
+            },
+        }
+    }
+}
+
+// This takes a raw pointer and a counter because `memory` may be uninitialized. `memory` _must_ be
+// a pointer to the beginning of an allocated but possibly-uninitialized block of
+// `num_nodes * NODE_BYTES` bytes
+//
+// We have to use raw pointers to read/write uninit, using "normal" indexing causes LLVM to freak
+// out. It counts as a read and causes all writes afterwards to be elided. Yes, really. I know, I
+// want to refactor this to use less `unsafe` as much as the next rustacean.
+unsafe fn initialize_memory(memory: *mut Node, num_nodes: usize, ident: &H256) {
+    // We use raw pointers here, see above
+    let dst = slice::from_raw_parts_mut(memory as *mut u8, NODE_BYTES);
+
+    debug_assert_eq!(ident.len(), 32);
+    keccak_512::write(&ident[..], dst);
+
+    for i in 1..num_nodes {
+        // We use raw pointers here, see above
+        let dst = slice::from_raw_parts_mut(memory.offset(i as _) as *mut u8, NODE_BYTES);
+        let src = slice::from_raw_parts(memory.offset(i as isize - 1) as *mut u8, NODE_BYTES);
+        keccak_512::write(src, dst);
+    }
+
+    // Now this is initialized, we can treat it as a slice.
+    let nodes: &mut [Node] = slice::from_raw_parts_mut(memory, num_nodes);
+
+    for _ in 0..ETHASH_CACHE_ROUNDS {
+        for i in 0..num_nodes {
+            let data_idx = (num_nodes - 1 + i) % num_nodes;
+            let idx = nodes.get_unchecked_mut(i).as_words()[0] as usize % num_nodes;
+
+            let data = {
+                let mut data: Node = nodes.get_unchecked(data_idx).clone();
+                let rhs: &Node = nodes.get_unchecked(idx);
+
+                for (a, b) in data.as_dwords_mut().iter_mut().zip(rhs.as_dwords()) {
+                    *a ^= *b;
+                }
+
+                data
+            };
+
+            keccak_512::write(&data.bytes, &mut nodes.get_unchecked_mut(i).bytes);
+        }
+    }
+}
diff --git a/client/consensus/ethash/src/compute.rs b/client/consensus/ethash/src/compute.rs
new file mode 100644
index 00000000..00bbcd96
--- /dev/null
+++ b/client/consensus/ethash/src/compute.rs
@@ -0,0 +1,452 @@
+// Copyright 2015-2020 Parity Technologies (UK) Ltd.
+// This file is part of OpenEthereum.
+
+// OpenEthereum is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// OpenEthereum is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with OpenEthereum.  If not, see <http://www.gnu.org/licenses/>.
+
+//! Ethash implementation
+//! See https://github.com/ethereum/wiki/wiki/Ethash
+
+// TODO: fix endianess for big endian
+
+use cache::{NodeCache, NodeCacheBuilder};
+use keccak::{keccak_256, keccak_512, H256};
+use progpow::{generate_cdag, keccak_f800_long, keccak_f800_short, progpow, CDag};
+use seed_compute::SeedHashCompute;
+use shared::*;
+use std::io;
+
+use std::{mem, path::Path};
+
+const MIX_WORDS: usize = ETHASH_MIX_BYTES / 4;
+const MIX_NODES: usize = MIX_WORDS / NODE_WORDS;
+pub const FNV_PRIME: u32 = 0x01000193;
+
+/// Computation result
+pub struct ProofOfWork {
+    /// Difficulty boundary
+    pub value: H256,
+    /// Mix
+    pub mix_hash: H256,
+}
+
+enum Algorithm {
+    Hashimoto,
+    Progpow(Box<CDag>),
+}
+
+pub struct Light {
+    block_number: u64,
+    cache: NodeCache,
+    algorithm: Algorithm,
+}
+
+/// Light cache structure
+impl Light {
+    pub fn new_with_builder(
+        builder: &NodeCacheBuilder,
+        cache_dir: &Path,
+        block_number: u64,
+        progpow_transition: u64,
+    ) -> Self {
+        let cache = builder.new_cache(cache_dir.to_path_buf(), block_number);
+
+        let algorithm = if block_number >= progpow_transition {
+            Algorithm::Progpow(Box::new(generate_cdag(cache.as_ref())))
+        } else {
+            Algorithm::Hashimoto
+        };
+
+        Light {
+            block_number,
+            cache,
+            algorithm,
+        }
+    }
+
+    /// Calculate the light boundary data
+    /// `header_hash` - The header hash to pack into the mix
+    /// `nonce` - The nonce to pack into the mix
+    pub fn compute(&self, header_hash: &H256, nonce: u64, block_number: u64) -> ProofOfWork {
+        match self.algorithm {
+            Algorithm::Progpow(ref c_dag) => {
+                let (value, mix_hash) = progpow(
+                    *header_hash,
+                    nonce,
+                    block_number,
+                    self.cache.as_ref(),
+                    c_dag,
+                );
+
+                ProofOfWork { value, mix_hash }
+            }
+            Algorithm::Hashimoto => light_compute(self, header_hash, nonce),
+        }
+    }
+
+    pub fn from_file_with_builder(
+        builder: &NodeCacheBuilder,
+        cache_dir: &Path,
+        block_number: u64,
+        progpow_transition: u64,
+    ) -> io::Result<Self> {
+        let cache = builder.from_file(cache_dir.to_path_buf(), block_number)?;
+
+        let algorithm = if block_number >= progpow_transition {
+            Algorithm::Progpow(Box::new(generate_cdag(cache.as_ref())))
+        } else {
+            Algorithm::Hashimoto
+        };
+
+        Ok(Light {
+            block_number,
+            cache,
+            algorithm,
+        })
+    }
+
+    pub fn to_file(&mut self) -> io::Result<&Path> {
+        self.cache.flush()?;
+        Ok(self.cache.cache_path())
+    }
+}
+
+pub fn slow_hash_block_number(block_number: u64) -> H256 {
+    SeedHashCompute::resume_compute_seedhash([0u8; 32], 0, block_number / ETHASH_EPOCH_LENGTH)
+}
+
+fn fnv_hash(x: u32, y: u32) -> u32 {
+    return x.wrapping_mul(FNV_PRIME) ^ y;
+}
+
+/// Difficulty quick check for POW preverification
+///
+/// `header_hash`      The hash of the header
+/// `nonce`            The block's nonce
+/// `mix_hash`         The mix digest hash
+/// Boundary recovered from mix hash
+pub fn quick_get_difficulty(
+    header_hash: &H256,
+    nonce: u64,
+    mix_hash: &H256,
+    progpow: bool,
+) -> H256 {
+    if progpow {
+        let seed = keccak_f800_short(*header_hash, nonce, [0u32; 8]);
+        keccak_f800_long(*header_hash, seed, unsafe { mem::transmute(*mix_hash) })
+    } else {
+        let mut buf = [0u8; 64 + 32];
+
+        let hash_len = header_hash.len();
+        buf[..hash_len].copy_from_slice(header_hash);
+        let end = hash_len + mem::size_of::<u64>();
+        buf[hash_len..end].copy_from_slice(&nonce.to_ne_bytes());
+
+        keccak_512::inplace_range(&mut buf, 0..end);
+        buf[64..].copy_from_slice(mix_hash);
+
+        let mut hash = [0u8; 32];
+        keccak_256::write(&buf, &mut hash);
+
+        hash
+    }
+}
+
+/// Calculate the light client data
+/// `light` - The light client handler
+/// `header_hash` - The header hash to pack into the mix
+/// `nonce` - The nonce to pack into the mix
+pub fn light_compute(light: &Light, header_hash: &H256, nonce: u64) -> ProofOfWork {
+    let full_size = get_data_size(light.block_number);
+    hash_compute(light, full_size, header_hash, nonce)
+}
+
+fn hash_compute(light: &Light, full_size: usize, header_hash: &H256, nonce: u64) -> ProofOfWork {
+    macro_rules! make_const_array {
+        ($n:expr, $value:expr) => {{
+            // We use explicit lifetimes to ensure that val's borrow is invalidated until the
+            // transmuted val dies.
+            unsafe fn make_const_array<T, U>(val: &mut [T]) -> &mut [U; $n] {
+                use std::mem;
+
+                debug_assert_eq!(val.len() * mem::size_of::<T>(), $n * mem::size_of::<U>());
+                &mut *(val.as_mut_ptr() as *mut [U; $n])
+            }
+
+            make_const_array($value)
+        }};
+    }
+
+    #[repr(C)]
+    struct MixBuf {
+        half_mix: Node,
+        compress_bytes: [u8; MIX_WORDS],
+    }
+
+    if full_size % MIX_WORDS != 0 {
+        panic!("Unaligned full size");
+    }
+
+    // You may be asking yourself: what in the name of Crypto Jesus is going on here? So: we need
+    // `half_mix` and `compress_bytes` in a single array later down in the code (we hash them
+    // together to create `value`) so that we can hash the full array. However, we do a bunch of
+    // reading and writing to these variables first. We originally allocated two arrays and then
+    // stuck them together with `ptr::copy_nonoverlapping` at the end, but this method is
+    // _significantly_ faster - by my benchmarks, a consistent 3-5%. This is the most ridiculous
+    // optimization I have ever done and I am so sorry. I can only chalk it up to cache locality
+    // improvements, since I can't imagine that 3-5% of our runtime is taken up by catting two
+    // arrays together.
+    let mut buf: MixBuf = MixBuf {
+        half_mix: {
+            // Pack `header_hash` and `nonce` together
+            let mut out = [0u8; NODE_BYTES];
+
+            let hash_len = header_hash.len();
+            out[..hash_len].copy_from_slice(header_hash);
+            let end = hash_len + mem::size_of::<u64>();
+            out[hash_len..end].copy_from_slice(&nonce.to_ne_bytes());
+
+            // compute keccak-512 hash and replicate across mix
+            keccak_512::inplace_range(&mut out, 0..end);
+
+            Node { bytes: out }
+        },
+        compress_bytes: [0u8; MIX_WORDS],
+    };
+
+    let mut mix: [_; MIX_NODES] = [buf.half_mix.clone(), buf.half_mix.clone()];
+
+    let page_size = 4 * MIX_WORDS;
+    let num_full_pages = (full_size / page_size) as u32;
+    // deref once for better performance
+    let cache: &[Node] = light.cache.as_ref();
+    let first_val = buf.half_mix.as_words()[0];
+
+    debug_assert_eq!(MIX_NODES, 2);
+    debug_assert_eq!(NODE_WORDS, 16);
+
+    for i in 0..ETHASH_ACCESSES as u32 {
+        let index = {
+            // This is trivially safe, but does not work on big-endian. The safety of this is
+            // asserted in debug builds (see the definition of `make_const_array!`).
+            let mix_words: &mut [u32; MIX_WORDS] =
+                unsafe { make_const_array!(MIX_WORDS, &mut mix) };
+
+            fnv_hash(first_val ^ i, mix_words[i as usize % MIX_WORDS]) % num_full_pages
+        };
+
+        // MIX_NODES
+        for n in 0..2 {
+            let tmp_node = calculate_dag_item(index * MIX_NODES as u32 + n as u32, cache);
+
+            // NODE_WORDS
+            for (a, b) in mix[n].as_words_mut().iter_mut().zip(tmp_node.as_words()) {
+                *a = fnv_hash(*a, *b);
+            }
+        }
+    }
+
+    let mix_words: [u32; MIX_WORDS] = unsafe { mem::transmute(mix) };
+
+    {
+        // We iterate precisely `compress.len()` times and set each index,
+        // leaving the array fully initialized. THIS ONLY WORKS ON LITTLE-ENDIAN MACHINES.
+        // See a future PR to make this and the rest of the code work correctly on
+        // big-endian arches like mips.
+        let compress: &mut [u32; MIX_WORDS / 4] =
+            unsafe { make_const_array!(MIX_WORDS / 4, &mut buf.compress_bytes) };
+        #[cfg(target_endian = "big")]
+        {
+            compile_error!("OpenEthereum currently only supports little-endian targets");
+        }
+
+        // Compress mix
+        debug_assert_eq!(MIX_WORDS / 4, 8);
+        for i in 0..8 {
+            let w = i * 4;
+
+            let mut reduction = mix_words[w + 0];
+            reduction = reduction.wrapping_mul(FNV_PRIME) ^ mix_words[w + 1];
+            reduction = reduction.wrapping_mul(FNV_PRIME) ^ mix_words[w + 2];
+            reduction = reduction.wrapping_mul(FNV_PRIME) ^ mix_words[w + 3];
+            compress[i] = reduction;
+        }
+    }
+
+    let mix_hash = buf.compress_bytes;
+
+    let value: H256 = {
+        // We can interpret the buffer as an array of `u8`s, since it's `repr(C)`.
+        let read_ptr: *const u8 = &buf as *const MixBuf as *const u8;
+        let buffer = unsafe {
+            core::slice::from_raw_parts(
+                read_ptr,
+                buf.half_mix.bytes.len() + buf.compress_bytes.len(),
+            )
+        };
+        // We overwrite the buf.compress_bytes since `keccak_256` has an internal buffer and so allows
+        // overlapping arrays as input.
+        keccak_256::write(buffer, &mut buf.compress_bytes);
+
+        buf.compress_bytes
+    };
+
+    ProofOfWork { mix_hash, value }
+}
+
+// TODO: Use the `simd` crate
+pub fn calculate_dag_item(node_index: u32, cache: &[Node]) -> Node {
+    let num_parent_nodes = cache.len();
+    let mut ret = cache[node_index as usize % num_parent_nodes].clone();
+    ret.as_words_mut()[0] ^= node_index;
+
+    keccak_512::inplace(ret.as_bytes_mut());
+
+    debug_assert_eq!(NODE_WORDS, 16);
+    for i in 0..ETHASH_DATASET_PARENTS as u32 {
+        let parent_index = fnv_hash(node_index ^ i, ret.as_words()[i as usize % NODE_WORDS])
+            % num_parent_nodes as u32;
+        let parent = &cache[parent_index as usize];
+
+        unroll! {
+            for w in 0..16 {
+                ret.as_words_mut()[w] = fnv_hash(ret.as_words()[w], parent.as_words()[w]);
+            }
+        }
+    }
+
+    keccak_512::inplace(ret.as_bytes_mut());
+
+    ret
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+    use std::fs;
+    use tempdir::TempDir;
+
+    #[test]
+    fn test_get_cache_size() {
+        // https://github.com/ethereum/wiki/wiki/Ethash/ef6b93f9596746a088ea95d01ca2778be43ae68f#data-sizes
+        assert_eq!(16776896usize, get_cache_size(0));
+        assert_eq!(16776896usize, get_cache_size(1));
+        assert_eq!(16776896usize, get_cache_size(ETHASH_EPOCH_LENGTH - 1));
+        assert_eq!(16907456usize, get_cache_size(ETHASH_EPOCH_LENGTH));
+        assert_eq!(16907456usize, get_cache_size(ETHASH_EPOCH_LENGTH + 1));
+        assert_eq!(284950208usize, get_cache_size(2046 * ETHASH_EPOCH_LENGTH));
+        assert_eq!(285081536usize, get_cache_size(2047 * ETHASH_EPOCH_LENGTH));
+        assert_eq!(
+            285081536usize,
+            get_cache_size(2048 * ETHASH_EPOCH_LENGTH - 1)
+        );
+    }
+
+    #[test]
+    fn test_get_data_size() {
+        // https://github.com/ethereum/wiki/wiki/Ethash/ef6b93f9596746a088ea95d01ca2778be43ae68f#data-sizes
+        assert_eq!(1073739904usize, get_data_size(0));
+        assert_eq!(1073739904usize, get_data_size(1));
+        assert_eq!(1073739904usize, get_data_size(ETHASH_EPOCH_LENGTH - 1));
+        assert_eq!(1082130304usize, get_data_size(ETHASH_EPOCH_LENGTH));
+        assert_eq!(1082130304usize, get_data_size(ETHASH_EPOCH_LENGTH + 1));
+        assert_eq!(18236833408usize, get_data_size(2046 * ETHASH_EPOCH_LENGTH));
+        assert_eq!(18245220736usize, get_data_size(2047 * ETHASH_EPOCH_LENGTH));
+    }
+
+    #[test]
+    fn test_difficulty_test() {
+        let hash = [
+            0xf5, 0x7e, 0x6f, 0x3a, 0xcf, 0xc0, 0xdd, 0x4b, 0x5b, 0xf2, 0xbe, 0xe4, 0x0a, 0xb3,
+            0x35, 0x8a, 0xa6, 0x87, 0x73, 0xa8, 0xd0, 0x9f, 0x5e, 0x59, 0x5e, 0xab, 0x55, 0x94,
+            0x05, 0x52, 0x7d, 0x72,
+        ];
+        let mix_hash = [
+            0x1f, 0xff, 0x04, 0xce, 0xc9, 0x41, 0x73, 0xfd, 0x59, 0x1e, 0x3d, 0x89, 0x60, 0xce,
+            0x6b, 0xdf, 0x8b, 0x19, 0x71, 0x04, 0x8c, 0x71, 0xff, 0x93, 0x7b, 0xb2, 0xd3, 0x2a,
+            0x64, 0x31, 0xab, 0x6d,
+        ];
+        let nonce = 0xd7b3ac70a301a249;
+        let boundary_good = [
+            0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x3e, 0x9b, 0x6c, 0x69, 0xbc, 0x2c, 0xe2, 0xa2,
+            0x4a, 0x8e, 0x95, 0x69, 0xef, 0xc7, 0xd7, 0x1b, 0x33, 0x35, 0xdf, 0x36, 0x8c, 0x9a,
+            0xe9, 0x7e, 0x53, 0x84,
+        ];
+        assert_eq!(
+            quick_get_difficulty(&hash, nonce, &mix_hash, false)[..],
+            boundary_good[..]
+        );
+        let boundary_bad = [
+            0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x3a, 0x9b, 0x6c, 0x69, 0xbc, 0x2c, 0xe2, 0xa2,
+            0x4a, 0x8e, 0x95, 0x69, 0xef, 0xc7, 0xd7, 0x1b, 0x33, 0x35, 0xdf, 0x36, 0x8c, 0x9a,
+            0xe9, 0x7e, 0x53, 0x84,
+        ];
+        assert!(quick_get_difficulty(&hash, nonce, &mix_hash, false)[..] != boundary_bad[..]);
+    }
+
+    #[test]
+    fn test_light_compute() {
+        let hash = [
+            0xf5, 0x7e, 0x6f, 0x3a, 0xcf, 0xc0, 0xdd, 0x4b, 0x5b, 0xf2, 0xbe, 0xe4, 0x0a, 0xb3,
+            0x35, 0x8a, 0xa6, 0x87, 0x73, 0xa8, 0xd0, 0x9f, 0x5e, 0x59, 0x5e, 0xab, 0x55, 0x94,
+            0x05, 0x52, 0x7d, 0x72,
+        ];
+        let mix_hash = [
+            0x1f, 0xff, 0x04, 0xce, 0xc9, 0x41, 0x73, 0xfd, 0x59, 0x1e, 0x3d, 0x89, 0x60, 0xce,
+            0x6b, 0xdf, 0x8b, 0x19, 0x71, 0x04, 0x8c, 0x71, 0xff, 0x93, 0x7b, 0xb2, 0xd3, 0x2a,
+            0x64, 0x31, 0xab, 0x6d,
+        ];
+        let boundary = [
+            0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x3e, 0x9b, 0x6c, 0x69, 0xbc, 0x2c, 0xe2, 0xa2,
+            0x4a, 0x8e, 0x95, 0x69, 0xef, 0xc7, 0xd7, 0x1b, 0x33, 0x35, 0xdf, 0x36, 0x8c, 0x9a,
+            0xe9, 0x7e, 0x53, 0x84,
+        ];
+        let nonce = 0xd7b3ac70a301a249;
+
+        let tempdir = TempDir::new("").unwrap();
+        // difficulty = 0x085657254bd9u64;
+        let light = NodeCacheBuilder::new(None, u64::max_value()).light(tempdir.path(), 486382);
+        let result = light_compute(&light, &hash, nonce);
+        assert_eq!(result.mix_hash[..], mix_hash[..]);
+        assert_eq!(result.value[..], boundary[..]);
+    }
+
+    #[test]
+    fn test_drop_old_data() {
+        let tempdir = TempDir::new("").unwrap();
+        let builder = NodeCacheBuilder::new(None, u64::max_value());
+        let first = builder
+            .light(tempdir.path(), 0)
+            .to_file()
+            .unwrap()
+            .to_owned();
+
+        let second = builder
+            .light(tempdir.path(), ETHASH_EPOCH_LENGTH)
+            .to_file()
+            .unwrap()
+            .to_owned();
+        assert!(fs::metadata(&first).is_ok());
+
+        let _ = builder
+            .light(tempdir.path(), ETHASH_EPOCH_LENGTH * 2)
+            .to_file();
+        assert!(fs::metadata(&first).is_err());
+        assert!(fs::metadata(&second).is_ok());
+
+        let _ = builder
+            .light(tempdir.path(), ETHASH_EPOCH_LENGTH * 3)
+            .to_file();
+        assert!(fs::metadata(&second).is_err());
+    }
+}
diff --git a/client/consensus/ethash/src/keccak.rs b/client/consensus/ethash/src/keccak.rs
new file mode 100644
index 00000000..134a11fb
--- /dev/null
+++ b/client/consensus/ethash/src/keccak.rs
@@ -0,0 +1,35 @@
+// Copyright 2015-2020 Parity Technologies (UK) Ltd.
+// This file is part of OpenEthereum.
+
+// OpenEthereum is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// OpenEthereum is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with OpenEthereum.  If not, see <http://www.gnu.org/licenses/>.
+
+extern crate keccak_hash as hash;
+
+pub type H256 = [u8; 32];
+
+pub mod keccak_512 {
+    use super::hash;
+
+    pub use self::hash::{
+        keccak512 as inplace, keccak512_range as inplace_range, keccak_512 as write,
+    };
+}
+
+pub mod keccak_256 {
+    use super::hash;
+
+    pub use self::hash::{
+        keccak256 as inplace, keccak256_range as inplace_range, keccak_256 as write,
+    };
+}
diff --git a/client/consensus/ethash/src/lib.rs b/client/consensus/ethash/src/lib.rs
new file mode 100644
index 00000000..2232d243
--- /dev/null
+++ b/client/consensus/ethash/src/lib.rs
@@ -0,0 +1,274 @@
+// Copyright 2015-2020 Parity Technologies (UK) Ltd.
+// This file is part of OpenEthereum.
+
+// OpenEthereum is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// OpenEthereum is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with OpenEthereum.  If not, see <http://www.gnu.org/licenses/>.
+
+extern crate either;
+extern crate ethereum_types;
+extern crate memmap;
+extern crate parking_lot;
+extern crate primal;
+extern crate tiny_keccak;
+
+#[macro_use]
+extern crate crunchy;
+#[macro_use]
+extern crate log;
+
+#[cfg(test)]
+extern crate rustc_hex;
+
+#[cfg(test)]
+extern crate serde_json;
+
+#[cfg(test)]
+extern crate tempdir;
+
+#[cfg(feature = "bench")]
+pub mod compute;
+#[cfg(not(feature = "bench"))]
+mod compute;
+
+mod cache;
+mod keccak;
+mod seed_compute;
+mod shared;
+
+#[cfg(feature = "bench")]
+pub mod progpow;
+#[cfg(not(feature = "bench"))]
+mod progpow;
+
+pub use cache::{NodeCacheBuilder, OptimizeFor};
+use compute::Light;
+pub use compute::{quick_get_difficulty, slow_hash_block_number, ProofOfWork};
+use ethereum_types::{BigEndianHash, U256, U512};
+use keccak::H256;
+use parking_lot::Mutex;
+pub use seed_compute::SeedHashCompute;
+pub use shared::ETHASH_EPOCH_LENGTH;
+use std::{
+    convert::TryFrom,
+    mem,
+    path::{Path, PathBuf},
+};
+
+use std::sync::Arc;
+
+struct LightCache {
+    recent_epoch: Option<u64>,
+    recent: Option<Arc<Light>>,
+    prev_epoch: Option<u64>,
+    prev: Option<Arc<Light>>,
+}
+
+/// Light/Full cache manager.
+pub struct EthashManager {
+    nodecache_builder: NodeCacheBuilder,
+    cache: Mutex<LightCache>,
+    cache_dir: PathBuf,
+    progpow_transition: u64,
+}
+
+impl EthashManager {
+    /// Create a new new instance of ethash manager
+    pub fn new<T: Into<Option<OptimizeFor>>>(
+        cache_dir: &Path,
+        optimize_for: T,
+        progpow_transition: u64,
+    ) -> EthashManager {
+        EthashManager {
+            cache_dir: cache_dir.to_path_buf(),
+            nodecache_builder: NodeCacheBuilder::new(
+                optimize_for.into().unwrap_or_default(),
+                progpow_transition,
+            ),
+            progpow_transition: progpow_transition,
+            cache: Mutex::new(LightCache {
+                recent_epoch: None,
+                recent: None,
+                prev_epoch: None,
+                prev: None,
+            }),
+        }
+    }
+
+    /// Calculate the light client data
+    /// `block_number` - Block number to check
+    /// `light` - The light client handler
+    /// `header_hash` - The header hash to pack into the mix
+    /// `nonce` - The nonce to pack into the mix
+    pub fn compute_light(&self, block_number: u64, header_hash: &H256, nonce: u64) -> ProofOfWork {
+        let epoch = block_number / ETHASH_EPOCH_LENGTH;
+        let light = {
+            let mut lights = self.cache.lock();
+            let light = if block_number == self.progpow_transition {
+                // we need to regenerate the cache to trigger algorithm change to progpow inside `Light`
+                None
+            } else {
+                match lights.recent_epoch.clone() {
+                    Some(ref e) if *e == epoch => lights.recent.clone(),
+                    _ => match lights.prev_epoch.clone() {
+                        Some(e) if e == epoch => {
+                            // don't swap if recent is newer.
+                            if lights.recent_epoch > lights.prev_epoch {
+                                None
+                            } else {
+                                // swap
+                                let t = lights.prev_epoch;
+                                lights.prev_epoch = lights.recent_epoch;
+                                lights.recent_epoch = t;
+                                let t = lights.prev.clone();
+                                lights.prev = lights.recent.clone();
+                                lights.recent = t;
+                                lights.recent.clone()
+                            }
+                        }
+                        _ => None,
+                    },
+                }
+            };
+
+            match light {
+                None => {
+                    let light = match self
+                        .nodecache_builder
+                        .light_from_file(&self.cache_dir, block_number)
+                    {
+                        Ok(light) => Arc::new(light),
+                        Err(e) => {
+                            debug!("Light cache file not found for {}:{}", block_number, e);
+                            let mut light =
+                                self.nodecache_builder.light(&self.cache_dir, block_number);
+                            if let Err(e) = light.to_file() {
+                                warn!("Light cache file write error: {}", e);
+                            }
+                            Arc::new(light)
+                        }
+                    };
+                    lights.prev_epoch = mem::replace(&mut lights.recent_epoch, Some(epoch));
+                    lights.prev = mem::replace(&mut lights.recent, Some(light.clone()));
+                    light
+                }
+                Some(light) => light,
+            }
+        };
+        light.compute(header_hash, nonce, block_number)
+    }
+}
+
+/// Convert an Ethash boundary to its original difficulty. Basically just `f(x) = 2^256 / x`.
+pub fn boundary_to_difficulty(boundary: &ethereum_types::H256) -> U256 {
+    difficulty_to_boundary_aux(&boundary.into_uint())
+}
+
+/// Convert an Ethash difficulty to the target boundary. Basically just `f(x) = 2^256 / x`.
+pub fn difficulty_to_boundary(difficulty: &U256) -> ethereum_types::H256 {
+    BigEndianHash::from_uint(&difficulty_to_boundary_aux(difficulty))
+}
+
+fn difficulty_to_boundary_aux<T: Into<U512>>(difficulty: T) -> ethereum_types::U256 {
+    let difficulty = difficulty.into();
+
+    assert!(!difficulty.is_zero());
+
+    if difficulty == U512::one() {
+        U256::max_value()
+    } else {
+        const PROOF: &str = "difficulty > 1, so result never overflows 256 bits; qed";
+        U256::try_from((U512::one() << 256) / difficulty).expect(PROOF)
+    }
+}
+
+#[test]
+fn test_lru() {
+    use tempdir::TempDir;
+
+    let tempdir = TempDir::new("").unwrap();
+    let ethash = EthashManager::new(tempdir.path(), None, u64::max_value());
+    let hash = [0u8; 32];
+    ethash.compute_light(1, &hash, 1);
+    ethash.compute_light(50000, &hash, 1);
+    assert_eq!(ethash.cache.lock().recent_epoch.unwrap(), 1);
+    assert_eq!(ethash.cache.lock().prev_epoch.unwrap(), 0);
+    ethash.compute_light(1, &hash, 1);
+    assert_eq!(ethash.cache.lock().recent_epoch.unwrap(), 0);
+    assert_eq!(ethash.cache.lock().prev_epoch.unwrap(), 1);
+    ethash.compute_light(70000, &hash, 1);
+    assert_eq!(ethash.cache.lock().recent_epoch.unwrap(), 2);
+    assert_eq!(ethash.cache.lock().prev_epoch.unwrap(), 0);
+}
+
+#[test]
+fn test_difficulty_to_boundary() {
+    use ethereum_types::{BigEndianHash, H256};
+    use std::str::FromStr;
+
+    assert_eq!(
+        difficulty_to_boundary(&U256::from(1)),
+        BigEndianHash::from_uint(&U256::max_value())
+    );
+    assert_eq!(
+        difficulty_to_boundary(&U256::from(2)),
+        H256::from_str("8000000000000000000000000000000000000000000000000000000000000000").unwrap()
+    );
+    assert_eq!(
+        difficulty_to_boundary(&U256::from(4)),
+        H256::from_str("4000000000000000000000000000000000000000000000000000000000000000").unwrap()
+    );
+    assert_eq!(
+        difficulty_to_boundary(&U256::from(32)),
+        H256::from_str("0800000000000000000000000000000000000000000000000000000000000000").unwrap()
+    );
+}
+
+#[test]
+fn test_difficulty_to_boundary_regression() {
+    use ethereum_types::H256;
+
+    // the last bit was originally being truncated when performing the conversion
+    // https://github.com/openethereum/openethereum/issues/8397
+    for difficulty in 1..9 {
+        assert_eq!(
+            U256::from(difficulty),
+            boundary_to_difficulty(&difficulty_to_boundary(&difficulty.into()))
+        );
+        assert_eq!(
+            H256::from_low_u64_be(difficulty),
+            difficulty_to_boundary(&boundary_to_difficulty(&H256::from_low_u64_be(difficulty)))
+        );
+        assert_eq!(
+            U256::from(difficulty),
+            boundary_to_difficulty(&BigEndianHash::from_uint(&boundary_to_difficulty(
+                &H256::from_low_u64_be(difficulty)
+            ))),
+        );
+        assert_eq!(
+            H256::from_low_u64_be(difficulty),
+            difficulty_to_boundary(&difficulty_to_boundary(&difficulty.into()).into_uint())
+        );
+    }
+}
+
+#[test]
+#[should_panic]
+fn test_difficulty_to_boundary_panics_on_zero() {
+    difficulty_to_boundary(&U256::from(0));
+}
+
+#[test]
+#[should_panic]
+fn test_boundary_to_difficulty_panics_on_zero() {
+    boundary_to_difficulty(&ethereum_types::H256::zero());
+}
diff --git a/client/consensus/ethash/src/progpow.rs b/client/consensus/ethash/src/progpow.rs
new file mode 100644
index 00000000..131f90c2
--- /dev/null
+++ b/client/consensus/ethash/src/progpow.rs
@@ -0,0 +1,582 @@
+// Copyright 2015-2020 Parity Technologies (UK) Ltd.
+// This file is part of OpenEthereum.
+
+// OpenEthereum is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// OpenEthereum is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with OpenEthereum.  If not, see <http://www.gnu.org/licenses/>.
+
+use compute::{calculate_dag_item, FNV_PRIME};
+use keccak::H256;
+use shared::{get_data_size, Node, ETHASH_ACCESSES, ETHASH_MIX_BYTES};
+
+const PROGPOW_CACHE_BYTES: usize = 16 * 1024;
+const PROGPOW_CACHE_WORDS: usize = PROGPOW_CACHE_BYTES / 4;
+const PROGPOW_CNT_CACHE: usize = 12;
+const PROGPOW_CNT_MATH: usize = 20;
+const PROGPOW_CNT_DAG: usize = ETHASH_ACCESSES;
+const PROGPOW_DAG_LOADS: usize = 4;
+const PROGPOW_MIX_BYTES: usize = 2 * ETHASH_MIX_BYTES;
+const PROGPOW_PERIOD_LENGTH: usize = 50; // blocks per progpow epoch (N)
+const PROGPOW_LANES: usize = 16;
+const PROGPOW_REGS: usize = 32;
+
+const FNV_HASH: u32 = 0x811c9dc5;
+
+const KECCAKF_RNDC: [u32; 24] = [
+    0x00000001, 0x00008082, 0x0000808a, 0x80008000, 0x0000808b, 0x80000001, 0x80008081, 0x00008009,
+    0x0000008a, 0x00000088, 0x80008009, 0x8000000a, 0x8000808b, 0x0000008b, 0x00008089, 0x00008003,
+    0x00008002, 0x00000080, 0x0000800a, 0x8000000a, 0x80008081, 0x00008080, 0x80000001, 0x80008008,
+];
+
+const KECCAKF_ROTC: [u32; 24] = [
+    1, 3, 6, 10, 15, 21, 28, 36, 45, 55, 2, 14, 27, 41, 56, 8, 25, 43, 62, 18, 39, 61, 20, 44,
+];
+
+const KECCAKF_PILN: [usize; 24] = [
+    10, 7, 11, 17, 18, 3, 5, 16, 8, 21, 24, 4, 15, 23, 19, 13, 12, 2, 20, 14, 22, 9, 6, 1,
+];
+
+fn keccak_f800_round(st: &mut [u32; 25], r: usize) {
+    // Theta
+    let mut bc = [0u32; 5];
+    for i in 0..bc.len() {
+        bc[i] = st[i] ^ st[i + 5] ^ st[i + 10] ^ st[i + 15] ^ st[i + 20];
+    }
+
+    for i in 0..bc.len() {
+        let t = bc[(i + 4) % 5] ^ bc[(i + 1) % 5].rotate_left(1);
+        for j in (0..st.len()).step_by(5) {
+            st[j + i] ^= t;
+        }
+    }
+
+    // Rho Pi
+    let mut t = st[1];
+
+    debug_assert_eq!(KECCAKF_ROTC.len(), 24);
+    for i in 0..24 {
+        let j = KECCAKF_PILN[i];
+        bc[0] = st[j];
+        st[j] = t.rotate_left(KECCAKF_ROTC[i]);
+        t = bc[0];
+    }
+
+    // Chi
+    for j in (0..st.len()).step_by(5) {
+        for i in 0..bc.len() {
+            bc[i] = st[j + i];
+        }
+        for i in 0..bc.len() {
+            st[j + i] ^= (!bc[(i + 1) % 5]) & bc[(i + 2) % 5];
+        }
+    }
+
+    // Iota
+    debug_assert!(r < KECCAKF_RNDC.len());
+    st[0] ^= KECCAKF_RNDC[r];
+}
+
+fn keccak_f800(header_hash: H256, nonce: u64, result: [u32; 8], st: &mut [u32; 25]) {
+    for i in 0..8 {
+        st[i] = (header_hash[4 * i] as u32)
+            + ((header_hash[4 * i + 1] as u32) << 8)
+            + ((header_hash[4 * i + 2] as u32) << 16)
+            + ((header_hash[4 * i + 3] as u32) << 24);
+    }
+
+    st[8] = nonce as u32;
+    st[9] = (nonce >> 32) as u32;
+
+    for i in 0..8 {
+        st[10 + i] = result[i];
+    }
+
+    for r in 0..22 {
+        keccak_f800_round(st, r);
+    }
+}
+
+pub fn keccak_f800_short(header_hash: H256, nonce: u64, result: [u32; 8]) -> u64 {
+    let mut st = [0u32; 25];
+    keccak_f800(header_hash, nonce, result, &mut st);
+    (st[0].swap_bytes() as u64) << 32 | st[1].swap_bytes() as u64
+}
+
+pub fn keccak_f800_long(header_hash: H256, nonce: u64, result: [u32; 8]) -> H256 {
+    let mut st = [0u32; 25];
+    keccak_f800(header_hash, nonce, result, &mut st);
+
+    // NOTE: transmute from `[u32; 8]` to `[u8; 32]`
+    unsafe { std::mem::transmute([st[0], st[1], st[2], st[3], st[4], st[5], st[6], st[7]]) }
+}
+
+#[inline]
+fn fnv1a_hash(h: u32, d: u32) -> u32 {
+    (h ^ d).wrapping_mul(FNV_PRIME)
+}
+
+#[derive(Clone)]
+struct Kiss99 {
+    z: u32,
+    w: u32,
+    jsr: u32,
+    jcong: u32,
+}
+
+impl Kiss99 {
+    fn new(z: u32, w: u32, jsr: u32, jcong: u32) -> Kiss99 {
+        Kiss99 { z, w, jsr, jcong }
+    }
+
+    #[inline]
+    fn next_u32(&mut self) -> u32 {
+        self.z = 36969u32
+            .wrapping_mul(self.z & 65535)
+            .wrapping_add(self.z >> 16);
+        self.w = 18000u32
+            .wrapping_mul(self.w & 65535)
+            .wrapping_add(self.w >> 16);
+        let mwc = (self.z << 16).wrapping_add(self.w);
+        self.jsr ^= self.jsr << 17;
+        self.jsr ^= self.jsr >> 13;
+        self.jsr ^= self.jsr << 5;
+        self.jcong = 69069u32.wrapping_mul(self.jcong).wrapping_add(1234567);
+
+        (mwc ^ self.jcong).wrapping_add(self.jsr)
+    }
+}
+
+fn fill_mix(seed: u64, lane_id: u32) -> [u32; PROGPOW_REGS] {
+    // Use FNV to expand the per-warp seed to per-lane
+    // Use KISS to expand the per-lane seed to fill mix
+    let z = fnv1a_hash(FNV_HASH, seed as u32);
+    let w = fnv1a_hash(z, (seed >> 32) as u32);
+    let jsr = fnv1a_hash(w, lane_id);
+    let jcong = fnv1a_hash(jsr, lane_id);
+
+    let mut rnd = Kiss99::new(z, w, jsr, jcong);
+
+    let mut mix = [0; PROGPOW_REGS];
+
+    debug_assert_eq!(PROGPOW_REGS, 32);
+    for i in 0..32 {
+        mix[i] = rnd.next_u32();
+    }
+
+    mix
+}
+
+// Merge new data from b into the value in a. Assuming A has high entropy only
+// do ops that retain entropy even if B is low entropy (IE don't do A&B)
+fn merge(a: u32, b: u32, r: u32) -> u32 {
+    match r % 4 {
+        0 => a.wrapping_mul(33).wrapping_add(b),
+        1 => (a ^ b).wrapping_mul(33),
+        2 => a.rotate_left(((r >> 16) % 31) + 1) ^ b,
+        _ => a.rotate_right(((r >> 16) % 31) + 1) ^ b,
+    }
+}
+
+fn math(a: u32, b: u32, r: u32) -> u32 {
+    match r % 11 {
+        0 => a.wrapping_add(b),
+        1 => a.wrapping_mul(b),
+        2 => ((a as u64).wrapping_mul(b as u64) >> 32) as u32,
+        3 => a.min(b),
+        4 => a.rotate_left(b),
+        5 => a.rotate_right(b),
+        6 => a & b,
+        7 => a | b,
+        8 => a ^ b,
+        9 => a.leading_zeros() + b.leading_zeros(),
+        _ => a.count_ones() + b.count_ones(),
+    }
+}
+
+fn progpow_init(seed: u64) -> (Kiss99, [u32; PROGPOW_REGS], [u32; PROGPOW_REGS]) {
+    let z = fnv1a_hash(FNV_HASH, seed as u32);
+    let w = fnv1a_hash(z, (seed >> 32) as u32);
+    let jsr = fnv1a_hash(w, seed as u32);
+    let jcong = fnv1a_hash(jsr, (seed >> 32) as u32);
+
+    let mut rnd = Kiss99::new(z, w, jsr, jcong);
+
+    // Create a random sequence of mix destinations for merge() and mix sources
+    // for cache reads guarantees every destination merged once and guarantees
+    // no duplicate cache reads, which could be optimized away. Uses
+    // Fisher-Yates shuffle.
+    let mut mix_seq_dst = [0u32; PROGPOW_REGS];
+    let mut mix_seq_cache = [0u32; PROGPOW_REGS];
+    for i in 0..mix_seq_dst.len() {
+        mix_seq_dst[i] = i as u32;
+        mix_seq_cache[i] = i as u32;
+    }
+
+    for i in (1..mix_seq_dst.len()).rev() {
+        let j = rnd.next_u32() as usize % (i + 1);
+        mix_seq_dst.swap(i, j);
+
+        let j = rnd.next_u32() as usize % (i + 1);
+        mix_seq_cache.swap(i, j);
+    }
+
+    (rnd, mix_seq_dst, mix_seq_cache)
+}
+
+pub type CDag = [u32; PROGPOW_CACHE_WORDS];
+
+fn progpow_loop(
+    seed: u64,
+    loop_: usize,
+    mix: &mut [[u32; PROGPOW_REGS]; PROGPOW_LANES],
+    cache: &[Node],
+    c_dag: &CDag,
+    data_size: usize,
+) {
+    // All lanes share a base address for the global load. Global offset uses
+    // mix[0] to guarantee it depends on the load result.
+    let g_offset = mix[loop_ % PROGPOW_LANES][0] as usize
+        % (64 * data_size / (PROGPOW_LANES * PROGPOW_DAG_LOADS));
+
+    // 256 bytes of dag data
+    let mut dag_item = [0u32; 64];
+
+    // Fetch DAG nodes (64 bytes each)
+    for l in 0..PROGPOW_DAG_LOADS {
+        let index = g_offset * PROGPOW_LANES * PROGPOW_DAG_LOADS + l * 16;
+        let node = calculate_dag_item(index as u32 / 16, cache);
+        dag_item[l * 16..(l + 1) * 16].clone_from_slice(node.as_words());
+    }
+
+    let (rnd, mix_seq_dst, mix_seq_cache) = progpow_init(seed);
+
+    // Lanes can execute in parallel and will be convergent
+    for l in 0..mix.len() {
+        let mut rnd = rnd.clone();
+
+        // Initialize the seed and mix destination sequence
+        let mut mix_seq_dst_cnt = 0;
+        let mut mix_seq_cache_cnt = 0;
+
+        let mut mix_dst = || {
+            let res = mix_seq_dst[mix_seq_dst_cnt % PROGPOW_REGS] as usize;
+            mix_seq_dst_cnt += 1;
+            res
+        };
+        let mut mix_cache = || {
+            let res = mix_seq_cache[mix_seq_cache_cnt % PROGPOW_REGS] as usize;
+            mix_seq_cache_cnt += 1;
+            res
+        };
+
+        for i in 0..PROGPOW_CNT_CACHE.max(PROGPOW_CNT_MATH) {
+            if i < PROGPOW_CNT_CACHE {
+                // Cached memory access, lanes access random 32-bit locations
+                // within the first portion of the DAG
+                let offset = mix[l][mix_cache()] as usize % PROGPOW_CACHE_WORDS;
+                let data = c_dag[offset];
+                let dst = mix_dst();
+
+                mix[l][dst] = merge(mix[l][dst], data, rnd.next_u32());
+            }
+
+            if i < PROGPOW_CNT_MATH {
+                // Random math
+                // Generate 2 unique sources
+                let src_rnd = rnd.next_u32() % (PROGPOW_REGS * (PROGPOW_REGS - 1)) as u32;
+                let src1 = src_rnd % PROGPOW_REGS as u32; // 0 <= src1 < PROGPOW_REGS
+                let mut src2 = src_rnd / PROGPOW_REGS as u32; // 0 <= src2 < PROGPOW_REGS - 1
+                if src2 >= src1 {
+                    src2 += 1; // src2 is now any reg other than src1
+                }
+
+                let data = math(mix[l][src1 as usize], mix[l][src2 as usize], rnd.next_u32());
+                let dst = mix_dst();
+
+                mix[l][dst] = merge(mix[l][dst], data, rnd.next_u32());
+            }
+        }
+
+        // Global load to sequential locations
+        let mut data_g = [0u32; PROGPOW_DAG_LOADS];
+        let index = ((l ^ loop_) % PROGPOW_LANES) * PROGPOW_DAG_LOADS;
+        for i in 0..PROGPOW_DAG_LOADS {
+            data_g[i] = dag_item[index + i];
+        }
+
+        // Consume the global load data at the very end of the loop to allow
+        // full latency hiding. Always merge into `mix[0]` to feed the offset
+        // calculation.
+        mix[l][0] = merge(mix[l][0], data_g[0], rnd.next_u32());
+        for i in 1..PROGPOW_DAG_LOADS {
+            let dst = mix_dst();
+            mix[l][dst] = merge(mix[l][dst], data_g[i], rnd.next_u32());
+        }
+    }
+}
+
+pub fn progpow(
+    header_hash: H256,
+    nonce: u64,
+    block_number: u64,
+    cache: &[Node],
+    c_dag: &CDag,
+) -> (H256, H256) {
+    let mut mix = [[0u32; PROGPOW_REGS]; PROGPOW_LANES];
+    let mut lane_results = [0u32; PROGPOW_LANES];
+    let mut result = [0u32; 8];
+
+    let data_size = get_data_size(block_number) / PROGPOW_MIX_BYTES;
+
+    // NOTE: This assert is required to aid the optimizer elide the non-zero
+    // remainder check in `progpow_loop`.
+    assert!(data_size > 0);
+
+    // Initialize mix for all lanes
+    let seed = keccak_f800_short(header_hash, nonce, result);
+
+    for l in 0..mix.len() {
+        mix[l] = fill_mix(seed, l as u32);
+    }
+
+    // Execute the randomly generated inner loop
+    let period = block_number / PROGPOW_PERIOD_LENGTH as u64;
+    for i in 0..PROGPOW_CNT_DAG {
+        progpow_loop(period, i, &mut mix, cache, c_dag, data_size);
+    }
+
+    // Reduce mix data to a single per-lane result
+    for l in 0..lane_results.len() {
+        lane_results[l] = FNV_HASH;
+        for i in 0..PROGPOW_REGS {
+            lane_results[l] = fnv1a_hash(lane_results[l], mix[l][i]);
+        }
+    }
+
+    // Reduce all lanes to a single 128-bit result
+    result = [FNV_HASH; 8];
+    for l in 0..PROGPOW_LANES {
+        result[l % 8] = fnv1a_hash(result[l % 8], lane_results[l]);
+    }
+
+    let digest = keccak_f800_long(header_hash, seed, result);
+
+    // NOTE: transmute from `[u32; 8]` to `[u8; 32]`
+    let result = unsafe { ::std::mem::transmute(result) };
+
+    (digest, result)
+}
+
+pub fn generate_cdag(cache: &[Node]) -> CDag {
+    let mut c_dag = [0u32; PROGPOW_CACHE_WORDS];
+
+    for i in 0..PROGPOW_CACHE_WORDS / 16 {
+        let node = calculate_dag_item(i as u32, cache);
+        for j in 0..16 {
+            c_dag[i * 16 + j] = node.as_words()[j];
+        }
+    }
+
+    c_dag
+}
+
+#[cfg(test)]
+mod test {
+    use tempdir::TempDir;
+
+    use super::*;
+    use cache::{NodeCacheBuilder, OptimizeFor};
+    use keccak::H256;
+    use rustc_hex::FromHex;
+    use serde_json::{self, Value};
+    use std::collections::VecDeque;
+
+    fn h256(hex: &str) -> H256 {
+        let bytes = FromHex::from_hex(hex).unwrap();
+        let mut res = [0; 32];
+        res.copy_from_slice(&bytes);
+        res
+    }
+
+    #[test]
+    fn test_cdag() {
+        let builder = NodeCacheBuilder::new(OptimizeFor::Memory, u64::max_value());
+        let tempdir = TempDir::new("").unwrap();
+        let cache = builder.new_cache(tempdir.into_path(), 0);
+
+        let c_dag = generate_cdag(cache.as_ref());
+
+        let expected = vec![
+            690150178u32,
+            1181503948,
+            2248155602,
+            2118233073,
+            2193871115,
+            1791778428,
+            1067701239,
+            724807309,
+            530799275,
+            3480325829,
+            3899029234,
+            1998124059,
+            2541974622,
+            1100859971,
+            1297211151,
+            3268320000,
+            2217813733,
+            2690422980,
+            3172863319,
+            2651064309,
+        ];
+
+        assert_eq!(c_dag.iter().take(20).cloned().collect::<Vec<_>>(), expected,);
+    }
+
+    #[test]
+    fn test_random_merge() {
+        let tests = [
+            (1000000u32, 101u32, 33000101u32),
+            (2000000, 102, 66003366),
+            (3000000, 103, 6000103),
+            (4000000, 104, 2000104),
+            (1000000, 0, 33000000),
+            (2000000, 0, 66000000),
+            (3000000, 0, 6000000),
+            (4000000, 0, 2000000),
+        ];
+
+        for (i, &(a, b, expected)) in tests.iter().enumerate() {
+            assert_eq!(merge(a, b, i as u32), expected,);
+        }
+    }
+
+    #[test]
+    fn test_random_math() {
+        let tests = [
+            (20u32, 22u32, 42u32),
+            (70000, 80000, 1305032704),
+            (70000, 80000, 1),
+            (1, 2, 1),
+            (3, 10000, 196608),
+            (3, 0, 3),
+            (3, 6, 2),
+            (3, 6, 7),
+            (3, 6, 5),
+            (0, 0xffffffff, 32),
+            (3 << 13, 1 << 5, 3),
+            (22, 20, 42),
+            (80000, 70000, 1305032704),
+            (80000, 70000, 1),
+            (2, 1, 1),
+            (10000, 3, 80000),
+            (0, 3, 0),
+            (6, 3, 2),
+            (6, 3, 7),
+            (6, 3, 5),
+            (0, 0xffffffff, 32),
+            (3 << 13, 1 << 5, 3),
+        ];
+
+        for (i, &(a, b, expected)) in tests.iter().enumerate() {
+            assert_eq!(math(a, b, i as u32), expected,);
+        }
+    }
+
+    #[test]
+    fn test_keccak_256() {
+        let expected = "5dd431e5fbc604f499bfa0232f45f8f142d0ff5178f539e5a7800bf0643697af";
+        assert_eq!(keccak_f800_long([0; 32], 0, [0; 8]), h256(expected),);
+    }
+
+    #[test]
+    fn test_keccak_64() {
+        let expected: u64 = 0x5dd431e5fbc604f4;
+        assert_eq!(keccak_f800_short([0; 32], 0, [0; 8]), expected,);
+    }
+
+    #[test]
+    fn test_progpow_hash() {
+        let builder = NodeCacheBuilder::new(OptimizeFor::Memory, u64::max_value());
+        let tempdir = TempDir::new("").unwrap();
+        let cache = builder.new_cache(tempdir.into_path(), 0);
+        let c_dag = generate_cdag(cache.as_ref());
+
+        let header_hash = [0; 32];
+
+        let (digest, result) = progpow(header_hash, 0, 0, cache.as_ref(), &c_dag);
+
+        let expected_digest =
+            FromHex::from_hex("63155f732f2bf556967f906155b510c917e48e99685ead76ea83f4eca03ab12b")
+                .unwrap();
+        let expected_result =
+            FromHex::from_hex("faeb1be51075b03a4ff44b335067951ead07a3b078539ace76fd56fc410557a3")
+                .unwrap();
+
+        assert_eq!(digest.to_vec(), expected_digest,);
+
+        assert_eq!(result.to_vec(), expected_result,);
+    }
+
+    #[test]
+    fn test_progpow_testvectors() {
+        struct ProgpowTest {
+            block_number: u64,
+            header_hash: H256,
+            nonce: u64,
+            mix_hash: H256,
+            final_hash: H256,
+        }
+
+        let tests: Vec<VecDeque<Value>> =
+            serde_json::from_slice(include_bytes!("../res/progpow_testvectors.json")).unwrap();
+
+        let tests: Vec<ProgpowTest> = tests
+            .into_iter()
+            .map(|mut test: VecDeque<Value>| {
+                assert!(test.len() == 5);
+
+                let block_number: u64 = serde_json::from_value(test.pop_front().unwrap()).unwrap();
+                let header_hash: String =
+                    serde_json::from_value(test.pop_front().unwrap()).unwrap();
+                let nonce: String = serde_json::from_value(test.pop_front().unwrap()).unwrap();
+                let mix_hash: String = serde_json::from_value(test.pop_front().unwrap()).unwrap();
+                let final_hash: String = serde_json::from_value(test.pop_front().unwrap()).unwrap();
+
+                ProgpowTest {
+                    block_number,
+                    header_hash: h256(&header_hash),
+                    nonce: u64::from_str_radix(&nonce, 16).unwrap(),
+                    mix_hash: h256(&mix_hash),
+                    final_hash: h256(&final_hash),
+                }
+            })
+            .collect();
+
+        for test in tests {
+            let builder = NodeCacheBuilder::new(OptimizeFor::Memory, u64::max_value());
+            let tempdir = TempDir::new("").unwrap();
+            let cache = builder.new_cache(tempdir.path().to_owned(), test.block_number);
+            let c_dag = generate_cdag(cache.as_ref());
+
+            let (digest, result) = progpow(
+                test.header_hash,
+                test.nonce,
+                test.block_number,
+                cache.as_ref(),
+                &c_dag,
+            );
+
+            assert_eq!(digest, test.final_hash);
+            assert_eq!(result, test.mix_hash);
+        }
+    }
+}
diff --git a/client/consensus/ethash/src/seed_compute.rs b/client/consensus/ethash/src/seed_compute.rs
new file mode 100644
index 00000000..6ca9aba7
--- /dev/null
+++ b/client/consensus/ethash/src/seed_compute.rs
@@ -0,0 +1,110 @@
+// Copyright 2015-2020 Parity Technologies (UK) Ltd.
+// This file is part of OpenEthereum.
+
+// OpenEthereum is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// OpenEthereum is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with OpenEthereum.  If not, see <http://www.gnu.org/licenses/>.
+
+use keccak::{keccak_256, H256};
+use shared;
+
+use std::cell::Cell;
+
+#[derive(Default)]
+pub struct SeedHashCompute {
+    prev_epoch: Cell<u64>,
+    prev_seedhash: Cell<H256>,
+}
+
+impl SeedHashCompute {
+    #[inline]
+    fn reset_cache(&self) {
+        self.prev_epoch.set(0);
+        self.prev_seedhash.set([0u8; 32]);
+    }
+
+    #[inline]
+    pub fn hash_block_number(&self, block_number: u64) -> H256 {
+        self.hash_epoch(shared::epoch(block_number))
+    }
+
+    #[inline]
+    pub fn hash_epoch(&self, epoch: u64) -> H256 {
+        if epoch < self.prev_epoch.get() {
+            // can't build on previous hash if requesting an older block
+            self.reset_cache();
+        }
+        if epoch > self.prev_epoch.get() {
+            let seed_hash = SeedHashCompute::resume_compute_seedhash(
+                self.prev_seedhash.get(),
+                self.prev_epoch.get(),
+                epoch,
+            );
+            self.prev_seedhash.set(seed_hash);
+            self.prev_epoch.set(epoch);
+        }
+        self.prev_seedhash.get()
+    }
+
+    #[inline]
+    pub fn resume_compute_seedhash(mut hash: H256, start_epoch: u64, end_epoch: u64) -> H256 {
+        for _ in start_epoch..end_epoch {
+            keccak_256::inplace(&mut hash);
+        }
+        hash
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::SeedHashCompute;
+
+    #[test]
+    fn test_seed_compute_once() {
+        let seed_compute = SeedHashCompute::default();
+        let hash = [
+            241, 175, 44, 134, 39, 121, 245, 239, 228, 236, 43, 160, 195, 152, 46, 7, 199, 5, 253,
+            147, 241, 206, 98, 43, 3, 104, 17, 40, 192, 79, 106, 162,
+        ];
+        assert_eq!(seed_compute.hash_block_number(486382), hash);
+    }
+
+    #[test]
+    fn test_seed_compute_zero() {
+        let seed_compute = SeedHashCompute::default();
+        assert_eq!(seed_compute.hash_block_number(0), [0u8; 32]);
+    }
+
+    #[test]
+    fn test_seed_compute_after_older() {
+        let seed_compute = SeedHashCompute::default();
+        // calculating an older value first shouldn't affect the result
+        let _ = seed_compute.hash_block_number(50000);
+        let hash = [
+            241, 175, 44, 134, 39, 121, 245, 239, 228, 236, 43, 160, 195, 152, 46, 7, 199, 5, 253,
+            147, 241, 206, 98, 43, 3, 104, 17, 40, 192, 79, 106, 162,
+        ];
+        assert_eq!(seed_compute.hash_block_number(486382), hash);
+    }
+
+    #[test]
+    fn test_seed_compute_after_newer() {
+        let seed_compute = SeedHashCompute::default();
+        // calculating an newer value first shouldn't affect the result
+        let _ = seed_compute.hash_block_number(972764);
+        let hash = [
+            241, 175, 44, 134, 39, 121, 245, 239, 228, 236, 43, 160, 195, 152, 46, 7, 199, 5, 253,
+            147, 241, 206, 98, 43, 3, 104, 17, 40, 192, 79, 106, 162,
+        ];
+        assert_eq!(seed_compute.hash_block_number(486382), hash);
+    }
+}
diff --git a/client/consensus/ethash/src/shared.rs b/client/consensus/ethash/src/shared.rs
new file mode 100644
index 00000000..4f72b61a
--- /dev/null
+++ b/client/consensus/ethash/src/shared.rs
@@ -0,0 +1,154 @@
+// Copyright 2015-2020 Parity Technologies (UK) Ltd.
+// This file is part of OpenEthereum.
+
+// OpenEthereum is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// OpenEthereum is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with OpenEthereum.  If not, see <http://www.gnu.org/licenses/>.
+
+use primal::is_prime;
+
+pub const DATASET_BYTES_INIT: u64 = 1 << 30;
+pub const DATASET_BYTES_GROWTH: u64 = 1 << 23;
+pub const CACHE_BYTES_INIT: u64 = 1 << 24;
+pub const CACHE_BYTES_GROWTH: u64 = 1 << 17;
+
+pub const ETHASH_EPOCH_LENGTH: u64 = 30000;
+pub const ETHASH_CACHE_ROUNDS: usize = 3;
+pub const ETHASH_MIX_BYTES: usize = 128;
+pub const ETHASH_ACCESSES: usize = 64;
+pub const ETHASH_DATASET_PARENTS: u32 = 256;
+pub const NODE_DWORDS: usize = NODE_WORDS / 2;
+pub const NODE_WORDS: usize = NODE_BYTES / 4;
+pub const NODE_BYTES: usize = 64;
+
+pub fn epoch(block_number: u64) -> u64 {
+    block_number / ETHASH_EPOCH_LENGTH
+}
+
+static CHARS: &'static [u8] = b"0123456789abcdef";
+pub fn to_hex(bytes: &[u8]) -> String {
+    let mut v = Vec::with_capacity(bytes.len() * 2);
+    for &byte in bytes.iter() {
+        v.push(CHARS[(byte >> 4) as usize]);
+        v.push(CHARS[(byte & 0xf) as usize]);
+    }
+
+    unsafe { String::from_utf8_unchecked(v) }
+}
+
+pub fn get_cache_size(block_number: u64) -> usize {
+    // TODO: Memoise
+    let mut sz: u64 = CACHE_BYTES_INIT + CACHE_BYTES_GROWTH * (block_number / ETHASH_EPOCH_LENGTH);
+    sz = sz - NODE_BYTES as u64;
+    while !is_prime(sz / NODE_BYTES as u64) {
+        sz = sz - 2 * NODE_BYTES as u64;
+    }
+    sz as usize
+}
+
+pub fn get_data_size(block_number: u64) -> usize {
+    // TODO: Memoise
+    let mut sz: u64 =
+        DATASET_BYTES_INIT + DATASET_BYTES_GROWTH * (block_number / ETHASH_EPOCH_LENGTH);
+    sz = sz - ETHASH_MIX_BYTES as u64;
+    while !is_prime(sz / ETHASH_MIX_BYTES as u64) {
+        sz = sz - 2 * ETHASH_MIX_BYTES as u64;
+    }
+    sz as usize
+}
+
+pub type NodeBytes = [u8; NODE_BYTES];
+pub type NodeWords = [u32; NODE_WORDS];
+pub type NodeDwords = [u64; NODE_DWORDS];
+
+macro_rules! static_assert_size_eq {
+	(@inner $a:ty, $b:ty, $($rest:ty),*) => {
+		fn first() {
+			static_assert_size_eq!($a, $b);
+		}
+
+		fn second() {
+			static_assert_size_eq!($b, $($rest),*);
+		}
+	};
+	(@inner $a:ty, $b:ty) => {
+		unsafe {
+			let val: $b = ::mem::MaybeUninit::uninit().assume_init();
+			let _: $a = ::std::mem::transmute(val);
+		}
+	};
+	($($rest:ty),*) => {
+		static_assert_size_eq!(size_eq: $($rest),*);
+	};
+	($name:ident : $($rest:ty),*) => {
+		#[allow(dead_code)]
+		fn $name() {
+			static_assert_size_eq!(@inner $($rest),*);
+		}
+	};
+}
+
+static_assert_size_eq!(Node, NodeBytes, NodeWords, NodeDwords);
+
+#[repr(C)]
+pub union Node {
+    pub dwords: NodeDwords,
+    pub words: NodeWords,
+    pub bytes: NodeBytes,
+}
+
+impl Clone for Node {
+    fn clone(&self) -> Self {
+        unsafe {
+            Node {
+                bytes: *&self.bytes,
+            }
+        }
+    }
+}
+
+// We use `inline(always)` because I was experiencing an 100% slowdown and `perf` showed that these
+// calls were taking up ~30% of the runtime. Adding these annotations fixes the issue. Remove at
+// your peril, if and only if you have benchmarks to prove that this doesn't reintroduce the
+// performance regression. It's not caused by the `debug_assert_eq!` either, your guess is as good
+// as mine.
+impl Node {
+    #[inline(always)]
+    pub fn as_bytes(&self) -> &NodeBytes {
+        unsafe { &self.bytes }
+    }
+
+    #[inline(always)]
+    pub fn as_bytes_mut(&mut self) -> &mut NodeBytes {
+        unsafe { &mut self.bytes }
+    }
+
+    #[inline(always)]
+    pub fn as_words(&self) -> &NodeWords {
+        unsafe { &self.words }
+    }
+
+    #[inline(always)]
+    pub fn as_words_mut(&mut self) -> &mut NodeWords {
+        unsafe { &mut self.words }
+    }
+
+    #[inline(always)]
+    pub fn as_dwords(&self) -> &NodeDwords {
+        unsafe { &self.dwords }
+    }
+
+    #[inline(always)]
+    pub fn as_dwords_mut(&mut self) -> &mut NodeDwords {
+        unsafe { &mut self.dwords }
+    }
+}
diff --git a/client/consensus/ethpow/Cargo.toml b/client/consensus/ethpow/Cargo.toml
new file mode 100644
index 00000000..fcd200e6
--- /dev/null
+++ b/client/consensus/ethpow/Cargo.toml
@@ -0,0 +1,28 @@
+[package]
+name = 'ethpow'
+version = "1.0.0"
+edition = '2018'
+authors = ['MVS DevHub <https://github.com/mvs-org>']
+repository = 'https://github.com/mvs-org/new-frontiers'
+description = 'Ethash-based Proof of Work algorithms for Substrate'
+license = "GPL-3.0-or-later"
+
+[dependencies]
+# Substrate packages
+sp-api = '3.0'
+sp-consensus-pow = '0.9'
+sp-core = '3.0'
+sp-runtime = '3.0'
+sp-blockchain = '3.0'
+log = '0.4.8'
+
+# Ethereum
+sc-consensus-pow = { path = "../../consensus/consensus-pow" }
+ethash = { path = "../../consensus/ethash" }
+serde = "1.0"
+serde_derive = "1.0"
+serde_json = "1.0"
+ethereum-types = "0.9.2"
+derive_more = "0.99.2"
+parity-scale-codec = '2.0'
+tempdir = "0.3"
\ No newline at end of file
diff --git a/client/consensus/ethpow/src/error.rs b/client/consensus/ethpow/src/error.rs
new file mode 100644
index 00000000..e5d77f62
--- /dev/null
+++ b/client/consensus/ethpow/src/error.rs
@@ -0,0 +1,69 @@
+// This file is part of Substrate.
+
+// Copyright (C) 2020-2021 Parity Technologies (UK) Ltd.
+// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+//! A manual sealing engine: the engine listens for rpc calls to seal blocks and create forks.
+//! This is suitable for a testing environment.
+
+
+/// Error code for rpc
+mod codes {
+	pub const MISMATCHED_H256_SEAL: i64 = 10_000;
+	pub const INVALID_SEAL: i64 = 11_000;
+	pub const EMPTY_TRANSACTION_POOL: i64 = 12_000;
+	pub const BLOCK_NOT_FOUND: i64 = 13_000;
+	pub const INVALID_POW: i64 = 14_000;
+	pub const INHERENTS_ERROR: i64 = 15_000;
+	pub const BLOCKCHAIN_ERROR: i64 = 16_000;
+	pub const UNKNOWN_ERROR: i64 = 20_000;
+}
+
+/// errors encountered by background block authorship task
+#[derive(Debug, derive_more::Display, derive_more::From)]
+pub enum Error {
+	/// Transaction pool is empty, cannot create a block
+	#[display(fmt = "Transaction pool is empty, set create_empty to true,\
+	if you want to create empty blocks")]
+	EmptyTransactionPool,
+	#[display(fmt = "Mismatched H256 Seal Element")]
+	MismatchedH256SealElement,
+	#[display(fmt = "Invalid WorkSeal")]
+	InvalidWorkSeal,
+	//#[display(fmt = "Invalid ProofOfWork: expected: {}, found: {}", _0, _1)]
+	#[display(fmt = "Invalid ProofOfWork, Invalid Difficulty")]
+	InvalidProofOfWork,
+	/// Some other error.
+	Other(String),
+}
+
+impl Error {
+	fn to_code(&self) -> i64 {
+		use Error::*;
+		match self {
+			MismatchedH256SealElement => codes::MISMATCHED_H256_SEAL,
+			InvalidWorkSeal => codes::INVALID_SEAL,
+			InvalidProofOfWork => codes::INVALID_POW,
+			EmptyTransactionPool => codes::EMPTY_TRANSACTION_POOL,
+			// ConsensusError(_) => codes::CONSENSUS_ERROR,
+			// InherentError(_) => codes::INHERENTS_ERROR,
+			// BlockchainError(_) => codes::BLOCKCHAIN_ERROR,
+			// SendError(_) | Canceled(_) => codes::SERVER_SHUTTING_DOWN,
+			_ => codes::UNKNOWN_ERROR
+		}
+	}
+}
+
diff --git a/client/consensus/ethpow/src/lib.rs b/client/consensus/ethpow/src/lib.rs
new file mode 100644
index 00000000..9dc41976
--- /dev/null
+++ b/client/consensus/ethpow/src/lib.rs
@@ -0,0 +1,341 @@
+use parity_scale_codec::{Decode, Encode};
+use sc_consensus_pow::{Error, PowAlgorithm};
+
+use sp_api::ProvideRuntimeApi;
+use sp_consensus_pow::{DifficultyApi, Seal as RawSeal};
+use sp_blockchain::HeaderBackend;
+use ethereum_types::{self, U256 as EU256, H256 as EH256};
+use sp_core::{U256, H256};
+use sp_runtime::generic::BlockId;
+use sp_runtime::traits::{Block as BlockT, Header as HeaderT, UniqueSaturatedInto};
+use std::{cmp, sync::Arc, time::{SystemTime, UNIX_EPOCH}};
+use ethash::{self, quick_get_difficulty, slow_hash_block_number, EthashManager};
+use log::{error, info, debug, trace, warn};
+
+mod error;
+use error::{Error as EthError};
+
+
+#[derive(Clone, PartialEq, Eq, Encode, Decode, Debug)]
+pub struct WorkSeal {
+    /// The found nonce
+    pub nonce : u64,
+    /// The proof-of-work hash of header.
+    pub pow_hash: H256,
+    /// The seed hash.
+    pub mix_digest: H256,
+    /// The difficulty
+    pub difficulty: U256,
+    /// The block number
+    pub header_nr: u64,
+    /// The timestamp
+    pub timestamp: u64,
+}
+
+/// A minimal PoW algorithm that uses Sha3 hashing.
+/// Difficulty is fixed at 1_000_000
+#[derive(Clone)]
+pub struct MinimalEthashAlgorithm {
+	pow: Arc<EthashManager>,
+}
+
+impl MinimalEthashAlgorithm {
+	pub fn new() -> Self {
+		use tempdir::TempDir;
+
+		let tempdir = TempDir::new("").unwrap();
+		Self { pow: Arc::new(EthashManager::new(tempdir.path(), None, u64::max_value())), }
+	}
+
+	fn verify_seal(&self, seal: &WorkSeal) -> Result<(), EthError> {
+		let mut tmp:[u8; 32] = seal.pow_hash.into();
+		let pre_hash = EH256::from(tmp);
+		tmp = seal.mix_digest.into();
+		let mix_digest = EH256::from(tmp);
+
+        let result = self.pow.compute_light(
+            seal.header_nr,
+            &pre_hash.0,
+            seal.nonce,
+        );
+        let mix = EH256(result.mix_hash);
+		tmp = ethash::boundary_to_difficulty(&EH256(result.value)).into();
+		let difficulty = U256::from(tmp);
+        trace!(target:"pow", "num: {num}, seed: {seed}, h: {h}, non: {non}, mix: {mix}, res: {res}",
+			   num = seal.header_nr,
+			   seed = EH256(slow_hash_block_number(seal.header_nr)),
+			   h = pre_hash,
+			   non = seal.nonce,
+			   mix = EH256(result.mix_hash),
+			   res = EH256(result.value));
+
+		if mix != mix_digest {
+            return Err(EthError::MismatchedH256SealElement);
+        }
+        if difficulty < seal.difficulty {
+            return Err(EthError::InvalidProofOfWork);
+        }
+
+		trace!(target:"pow", "miner verified ok");
+        Ok(())
+    }
+}
+
+// Here we implement the general PowAlgorithm trait for our concrete EthashAlgorithm
+impl<B: BlockT<Hash = H256>> PowAlgorithm<B> for MinimalEthashAlgorithm {
+	type Difficulty = U256;
+
+	fn difficulty(&self, _parent: B::Hash) -> Result<Self::Difficulty, Error<B>> {
+		// Fixed difficulty hardcoded here
+		Ok(U256::from(1_000_000))
+	}
+
+	fn calc_difficulty(&self, _parent: B::Hash, _cur: B::Hash) -> Result<Self::Difficulty, Error<B>> {
+		// Fixed difficulty hardcoded here
+		Ok(U256::from(1_000_000))
+	}
+
+	fn verify(
+		&self,
+		_parent: &BlockId<B>,
+		pre_hash: &H256,
+		_pre_digest: Option<&[u8]>,
+		seal: &RawSeal,
+		difficulty: Self::Difficulty,
+	) -> Result<bool, Error<B>> {
+		// Try to construct a seal object by decoding the raw seal given
+		let seal = match WorkSeal::decode(&mut &seal[..]) {
+			Ok(seal) => seal,
+			Err(_) => return Ok(false),
+		};
+
+		match self.verify_seal(&seal) {
+			Ok(_) => {},
+			Err(_) => return Ok(false),
+		};
+
+		Ok(true)
+	}
+}
+
+/// A complete PoW Algorithm that uses Sha3 hashing.
+/// Needs a reference to the client so it can grab the difficulty from the runtime.
+pub struct EthashAlgorithm<C> {
+	client: Arc<C>,
+	pow: Arc<EthashManager>,
+	minimum_difficulty: U256,
+	difficulty_bound_divisor: U256,
+	difficulty_increment_divisor: u64,
+	duration_limit: u64,
+	progpow: bool,
+}
+
+impl<C> EthashAlgorithm<C> {
+	pub fn new(client: Arc<C>) -> Self {
+		use tempdir::TempDir;
+
+		let tempdir = TempDir::new("").unwrap();
+		Self { 
+			client, 
+			pow: Arc::new(EthashManager::new(tempdir.path(), None, u64::max_value())), 
+			minimum_difficulty: U256::from(1_000_000),
+			difficulty_bound_divisor: U256::from(2048),
+            difficulty_increment_divisor: 10,
+			duration_limit: 13,
+			progpow: false,
+		}
+	}
+
+	fn verify_seal(&self, seal: &WorkSeal) -> Result<(), EthError> {
+		let mut tmp:[u8; 32] = seal.pow_hash.into();
+		let pre_hash = EH256::from(tmp);
+		tmp = seal.mix_digest.into();
+		let mix_digest = EH256::from(tmp);
+
+        let result = self.pow.compute_light(
+            seal.header_nr,
+            &pre_hash.0,
+            seal.nonce,
+        );
+        let mix = EH256(result.mix_hash);
+		tmp = ethash::boundary_to_difficulty(&EH256(result.value)).into();
+		let difficulty = U256::from(tmp);
+        trace!(target:"pow", "num: {num}, seed: {seed}, h: {h}, non: {non}, mix: {mix}, res: {res}",
+			   num = seal.header_nr,
+			   seed = EH256(slow_hash_block_number(seal.header_nr)),
+			   h = pre_hash,
+			   non = seal.nonce,
+			   mix = EH256(result.mix_hash),
+			   res = EH256(result.value));
+
+		if mix != mix_digest {
+			debug!(target:"pow", "verify_seal EthError::MismatchedH256SealElement");
+            return Err(EthError::MismatchedH256SealElement);
+        }
+        if difficulty < seal.difficulty {
+			debug!(target:"pow", "verify_seal EthError::InvalidProofOfWork");
+            return Err(EthError::InvalidProofOfWork);
+        }
+
+		trace!(target:"pow", "miner verified ok");
+        Ok(())
+    }
+}
+
+// Manually implement clone. Deriving doesn't work because
+// it'll derive impl<C: Clone> Clone for EthashAlgorithm<C>. But C in practice isn't Clone.
+impl<C> Clone for EthashAlgorithm<C> {
+	fn clone(&self) -> Self {
+		Self::new(self.client.clone())
+	}
+}
+
+// Here we implement the general PowAlgorithm trait for our concrete EthashAlgorithm
+impl<B: BlockT<Hash = H256>, C> PowAlgorithm<B> for EthashAlgorithm<C>
+where
+	C: HeaderBackend<B> + ProvideRuntimeApi<B>,
+{
+	type Difficulty = U256;
+
+	fn difficulty(&self, hash: B::Hash) -> Result<Self::Difficulty, Error<B>> {
+		let header = self.client.header(BlockId::<B>::hash(hash)).map_err(|err| {
+				sc_consensus_pow::Error::Other(format!("{:?}", err))
+			})?.ok_or_else(|| {
+				sc_consensus_pow::Error::Other(format!("there should be header"))
+			})?;
+		let raw_seal = match sc_consensus_pow::fetch_seal::<B>(
+				header.digest().logs.last(),
+				hash,
+			) {
+			Ok(seal) => seal,
+			Err(err) => {
+				let nr :u64 = UniqueSaturatedInto::<u64>::unique_saturated_into(*header.number());
+				if nr == 0 { //:NOTICE: This should be the genesis header, use minimum_difficulty
+					return Ok(self.minimum_difficulty);
+				} else {
+					return Err(sc_consensus_pow::Error::Other(format!("{:?}", err)));
+				}
+			},
+		};
+		let seal = WorkSeal::decode(&mut &raw_seal[..]).map_err(|err| {
+				sc_consensus_pow::Error::Other(format!("{:?}", err))
+			})?;
+
+		// header difficulty
+		Ok(seal.difficulty)
+	}
+
+	fn calc_difficulty(&self, parent: B::Hash, cur: B::Hash) -> Result<Self::Difficulty, Error<B>> {
+		let parent_header = match self.client.header(BlockId::<B>::hash(parent)).map_err(|err| {
+				sc_consensus_pow::Error::Other(format!("{:?}", err))
+			})? {
+				Some(header) => header,
+				None => {
+					//:NOTICE: This should be the genesis header, use minimum_difficulty
+					return Ok(self.minimum_difficulty);
+				},
+			};
+		let raw_seal = match sc_consensus_pow::fetch_seal::<B>(
+				parent_header.digest().logs.last(),
+				parent,
+			) {
+			Ok(seal) => seal,
+			Err(err) => {
+				let nr :u64 = UniqueSaturatedInto::<u64>::unique_saturated_into(*parent_header.number());
+				if nr == 0 { //:NOTICE: This should be the genesis header, use minimum_difficulty
+					return Ok(self.minimum_difficulty);
+				} else {
+					return Err(sc_consensus_pow::Error::Other(format!("{:?}", err)));
+				}
+			},
+		};
+		let parent_seal = WorkSeal::decode(&mut &raw_seal[..]).map_err(|err| {
+				sc_consensus_pow::Error::Other(format!("{:?}", err))
+			})?;
+
+		let header = self.client.header(BlockId::<B>::hash(cur)).map_err(|err| {
+				sc_consensus_pow::Error::Other(format!("{:?}", err))
+			})?.ok_or_else(|| {
+				sc_consensus_pow::Error::Other(format!("there should be header"))
+			})?;
+		let raw_seal = sc_consensus_pow::fetch_seal::<B>(
+				header.digest().logs.last(),
+				cur,
+			).map_err(|err| {
+				sc_consensus_pow::Error::Other(format!("{:?}", err))
+			})?;
+		let seal = WorkSeal::decode(&mut &raw_seal[..]).map_err(|err| {
+				sc_consensus_pow::Error::Other(format!("{:?}", err))
+			})?;
+		
+		let min_difficulty = self.minimum_difficulty;
+		let difficulty_bound_divisor = self.difficulty_bound_divisor;
+		let duration_limit = self.duration_limit;
+
+        let mut target = if seal.timestamp >= parent_seal.timestamp + duration_limit {
+			seal.difficulty - (seal.difficulty / difficulty_bound_divisor)
+		} else {
+			seal.difficulty + (seal.difficulty / difficulty_bound_divisor)
+		};
+		target = cmp::max(min_difficulty, target);
+		debug!(target:"pow", "duration: {}, pTime: {}, cTime: {}, old_dif: {}, new_dif: {}", 
+			seal.timestamp-parent_seal.timestamp, parent_seal.timestamp, seal.timestamp, seal.difficulty, target);
+		
+		// parent header difficulty
+		Ok(target)
+	}
+
+	fn verify(
+		&self,
+		parent: &BlockId<B>,
+		pre_hash: &H256,
+		_pre_digest: Option<&[u8]>,
+		seal: &RawSeal,
+		difficulty: Self::Difficulty,
+	) -> Result<bool, Error<B>> {
+		// Try to construct a seal object by decoding the raw seal given
+		let seal = match WorkSeal::decode(&mut &seal[..]) {
+			Ok(seal) => seal,
+			Err(_) => return Ok(false),
+		};
+
+		let parent_header = self.client.header(*parent).map_err(|err| {
+				sc_consensus_pow::Error::Other(format!("{:?}", err))
+			})?.ok_or_else(|| {
+				sc_consensus_pow::Error::Other(format!("there should be header"))
+			})?;
+		let nr :u64 = UniqueSaturatedInto::<u64>::unique_saturated_into(*parent_header.number());
+		// Basic seal check
+		if nr != 0 { //:NOTICE: genesis header doesn't contain seal
+			let raw_seal = sc_consensus_pow::fetch_seal::<B>(
+					parent_header.digest().logs.last(),
+					parent_header.hash(),
+				).map_err(|err| {
+					sc_consensus_pow::Error::Other(format!("{:?}", err))
+				})?;
+			let parent_seal = WorkSeal::decode(&mut &raw_seal[..]).map_err(|err| {
+					sc_consensus_pow::Error::Other(format!("{:?}", err))
+				})?;
+			
+			if seal.timestamp < parent_seal.timestamp {
+				return Err(sc_consensus_pow::Error::InvalidSeal);
+			}
+
+			if seal.header_nr != parent_seal.header_nr + 1 {
+				return Err(sc_consensus_pow::Error::InvalidSeal);
+			}
+
+			const ACCEPTABLE_DRIFT: u64 = 15;
+			let timestamp_now = SystemTime::now().duration_since(UNIX_EPOCH).unwrap().as_secs();
+			if seal.timestamp > timestamp_now + ACCEPTABLE_DRIFT {
+				return Err(sc_consensus_pow::Error::TooFarInFuture);
+			}
+		}
+
+		self.verify_seal(&seal).map_err(|err| {
+				sc_consensus_pow::Error::Other(format!("{:?}", err))
+			})?;
+
+		Ok(true)
+	}
+}
diff --git a/client/consensus/Cargo.toml b/client/consensus/fc-consensus/Cargo.toml
similarity index 100%
rename from client/consensus/Cargo.toml
rename to client/consensus/fc-consensus/Cargo.toml
diff --git a/client/consensus/src/lib.rs b/client/consensus/fc-consensus/src/lib.rs
similarity index 100%
rename from client/consensus/src/lib.rs
rename to client/consensus/fc-consensus/src/lib.rs
diff --git a/client/ethash-rpc/Cargo.toml b/client/ethash-rpc/Cargo.toml
new file mode 100644
index 00000000..1704fa3d
--- /dev/null
+++ b/client/ethash-rpc/Cargo.toml
@@ -0,0 +1,28 @@
+[package]
+name = 'ethash-rpc'
+version = "1.0.0"
+edition = '2018'
+authors = ['MVS DevHub <https://github.com/mvs-org>']
+repository = 'https://github.com/mvs-org/new-frontiers'
+description = 'Ethash Algorithm RPC for external miner'
+license = "GPL-3.0-or-later"
+
+[dependencies]
+# Substrate packages
+# sp-api = '3.0'
+sp-core = '3.0'
+futures = '0.3.4'
+jsonrpc-core = "15.0"
+jsonrpc-derive = "15.0"
+serde = "1.0"
+serde_derive = "1.0"
+serde_json = "1.0"
+derive_more = "0.99.2"
+parity-scale-codec = '2.0'
+log = '0.4.8'
+
+# Ethereum
+# ethereum-types = "0.9.2"
+ethash = { path = "../consensus/ethash" }
+
+
diff --git a/client/ethash-rpc/src/error.rs b/client/ethash-rpc/src/error.rs
new file mode 100644
index 00000000..65759074
--- /dev/null
+++ b/client/ethash-rpc/src/error.rs
@@ -0,0 +1,109 @@
+// This file is part of Substrate.
+
+// Copyright (C) 2020-2021 Parity Technologies (UK) Ltd.
+// SPDX-License-Identifier: GPL-3.0-or-later WITH Classpath-exception-2.0
+
+// This program is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+//! A manual sealing engine: the engine listens for rpc calls to seal blocks and create forks.
+//! This is suitable for a testing environment.
+
+use futures::channel::{oneshot, mpsc::SendError};
+
+/// Error code for rpc
+mod codes {
+	pub const SERVER_SHUTTING_DOWN: i64 = 10_000;
+	pub const BLOCK_IMPORT_FAILED: i64 = 11_000;
+	pub const EMPTY_TRANSACTION_POOL: i64 = 12_000;
+	pub const BLOCK_NOT_FOUND: i64 = 13_000;
+	pub const CONSENSUS_ERROR: i64 = 14_000;
+	pub const INHERENTS_ERROR: i64 = 15_000;
+	pub const BLOCKCHAIN_ERROR: i64 = 16_000;
+	pub const UNKNOWN_ERROR: i64 = 20_000;
+}
+
+/// errors encountered by background block authorship task
+#[derive(Debug, derive_more::Display, derive_more::From)]
+pub enum Error {
+	// /// An error occurred while importing the block
+	// #[display(fmt = "Block import failed: {:?}", _0)]
+	// BlockImportError(ImportResult),
+	/// Transaction pool is empty, cannot create a block
+	#[display(fmt = "Transaction pool is empty, set create_empty to true,\
+	if you want to create empty blocks")]
+	EmptyTransactionPool,
+	// /// encountered during creation of Proposer.
+	// #[display(fmt = "Consensus Error: {}", _0)]
+	// ConsensusError(ConsensusError),
+	// /// Failed to create Inherents data
+	// #[display(fmt = "Inherents Error: {}", _0)]
+	// InherentError(InherentsError),
+	// /// error encountered during finalization
+	// #[display(fmt = "Finalization Error: {}", _0)]
+	// BlockchainError(BlockchainError),
+	/// Supplied parent_hash doesn't exist in chain
+	#[display(fmt = "Supplied parent_hash: {} doesn't exist in chain", _0)]
+	#[from(ignore)]
+	BlockNotFound(String),
+	/// Some string error
+	#[display(fmt = "{}", _0)]
+	#[from(ignore)]
+	StringError(String),
+	///send error
+	#[display(fmt = "Consensus process is terminating")]
+	Canceled(oneshot::Canceled),
+	///send error
+	#[display(fmt = "Consensus process is terminating")]
+	SendError(SendError),
+	/// no work
+	#[display(fmt = "No work now")]
+	NoWork,
+	#[display(fmt = "Metadata not available")]
+	NoMetaData,
+	#[display(fmt = "Mismatched H256 Seal Element")]
+	MismatchedH256SealElement,
+	//#[display(fmt = "Invalid ProofOfWork: expected: {}, found: {}", _0, _1)]
+	#[display(fmt = "Invalid ProofOfWork, Invalid Difficulty")]
+	InvalidProofOfWork,
+	#[display(fmt = "Unimplemented")]
+	Unimplemented,
+	/// Some other error.
+	Other(String),
+}
+
+impl Error {
+	fn to_code(&self) -> i64 {
+		use Error::*;
+		match self {
+			// BlockImportError(_) => codes::BLOCK_IMPORT_FAILED,
+			BlockNotFound(_) => codes::BLOCK_NOT_FOUND,
+			EmptyTransactionPool => codes::EMPTY_TRANSACTION_POOL,
+			// ConsensusError(_) => codes::CONSENSUS_ERROR,
+			// InherentError(_) => codes::INHERENTS_ERROR,
+			// BlockchainError(_) => codes::BLOCKCHAIN_ERROR,
+			SendError(_) | Canceled(_) => codes::SERVER_SHUTTING_DOWN,
+			_ => codes::UNKNOWN_ERROR
+		}
+	}
+}
+
+impl std::convert::From<Error> for jsonrpc_core::Error {
+	fn from(error: Error) -> Self {
+		jsonrpc_core::Error {
+			code: jsonrpc_core::ErrorCode::ServerError(error.to_code()),
+			message: format!("{}", error),
+			data: None
+		}
+	}
+}
diff --git a/client/ethash-rpc/src/lib.rs b/client/ethash-rpc/src/lib.rs
new file mode 100644
index 00000000..8dd2859e
--- /dev/null
+++ b/client/ethash-rpc/src/lib.rs
@@ -0,0 +1,141 @@
+
+use jsonrpc_core::Result;
+use jsonrpc_core::Error;
+use jsonrpc_derive::rpc;
+use futures::{
+	channel::{mpsc, oneshot},
+	TryFutureExt,
+	FutureExt,
+	SinkExt
+};
+use std::sync::Arc;
+use sp_core::{H256, U256};
+use log;
+
+mod work;
+mod error;
+pub use work::{Work};
+pub use error::{Error as RpcError}; 
+
+/// Future's type for jsonrpc
+type FutureResult<T> = Box<dyn jsonrpc_core::futures::Future<Item = T, Error = Error> + Send>;
+/// sender passed to the authorship task to report errors or successes.
+pub type Sender<T> = Option<oneshot::Sender<std::result::Result<T, RpcError>>>;
+
+/// Message sent to the background authorship task, usually by RPC.
+pub enum EtheminerCmd<Hash> {
+	GetWork {
+		/// sender to report errors/success to the rpc.
+		sender: Sender<Work>,
+	},
+	/// Tells the engine to finalize the block with the supplied hash
+	SubmitWork {
+		/// The found nonce
+		nonce : U256,
+		/// The proof-of-work hash of header.
+		pow_hash: H256,
+		/// The seed hash.
+		mix_digest: H256,
+		/// sender to report errors/success to the rpc.
+		sender: Sender<bool>,
+	},
+	SubmitHashrate {
+		/// hash of the block
+		hash: Hash,
+		/// sender to report errors/success to the rpc.
+		sender: Sender<bool>,
+	},
+}
+
+#[rpc(server)]
+pub trait EthashRpc {
+	#[rpc(name = "eth_getWork")]
+    fn eth_getWork(&self, _: Option<u64>) -> FutureResult<Work>;
+
+	#[rpc(name = "eth_submitWork")]
+	fn eth_submitWork(&self, nonce: U256, pow_hash: H256, mix_digest: H256) -> FutureResult<bool>;
+
+	#[rpc(name = "eth_hashrate")]
+    fn eth_hashrate(&self) -> Result<U256>;
+
+	#[rpc(name = "eth_submitHashrate")]
+	fn eth_submitHashrate(&self, _: U256, _: H256) -> Result<bool>;
+}
+
+/// A struct that implements the `EthashRpc`
+pub struct EthashData<C, Hash> {
+	client: Arc<C>,
+	command_sink: mpsc::Sender<EtheminerCmd<Hash>>,
+}
+
+impl<C, Hash> EthashData<C, Hash> {
+	/// Create new `EthashData` instance with the given reference to the client.
+	pub fn new(client: Arc<C>, command_sink: mpsc::Sender<EtheminerCmd<Hash>>) -> Self {
+		Self {
+			client,
+			command_sink,
+		}
+	}
+}
+
+impl<C: Send + Sync + 'static, Hash: Send + 'static> EthashRpc for EthashData<C, Hash> {
+	fn eth_getWork(&self, no_new_work_timeout: Option<u64>) -> FutureResult<Work> {
+		let mut sink = self.command_sink.clone();
+		let future = async move {
+			let (sender, receiver) = oneshot::channel();
+			let command = EtheminerCmd::GetWork {
+				sender: Some(sender),
+			};
+			sink.send(command).await?;
+			receiver.await?
+		}.boxed();
+
+		Box::new(future.map_err(Error::from).compat())
+	}
+
+	fn eth_submitWork(&self, nonce: U256, pow_hash: H256, mix_digest: H256) -> FutureResult<bool> {
+		let mut sink = self.command_sink.clone();
+		let future = async move {
+			let (sender, receiver) = oneshot::channel();
+			let command = EtheminerCmd::SubmitWork {
+				nonce,
+				pow_hash,
+				mix_digest,
+				sender: Some(sender),
+			};
+			sink.send(command).await?;
+			receiver.await?
+		}.boxed();
+
+		Box::new(future.map_err(Error::from).compat())
+	}
+
+	fn eth_hashrate(&self) -> Result<U256> {
+		//Ok(default())
+		//Err(errors::unimplemented(None))
+		Err(Error::from(RpcError::Unimplemented))
+	}
+
+	fn eth_submitHashrate(&self, _: U256, _: H256) -> Result<bool> {
+		Ok(true)
+	}
+}
+
+/// report any errors or successes encountered by the authorship task back
+/// to the rpc
+pub fn send_result<T: std::fmt::Debug>(
+	sender: &mut Sender<T>,
+	result: std::result::Result<T, RpcError>
+) {
+	if let Some(sender) = sender.take() {
+		if let Err(err) = sender.send(result) {
+			log::warn!("Server is shutting down: {:?}", err)
+		}
+	} else {
+		// instant seal doesn't report errors over rpc, simply log them.
+		match result {
+			Ok(r) => log::info!("Instant Seal success: {:?}", r),
+			Err(e) => log::error!("Instant Seal encountered an error: {}", e)
+		}
+	}
+}
diff --git a/client/ethash-rpc/src/work.rs b/client/ethash-rpc/src/work.rs
new file mode 100644
index 00000000..3c8b78b1
--- /dev/null
+++ b/client/ethash-rpc/src/work.rs
@@ -0,0 +1,51 @@
+// Copyright 2015-2020 Parity Technologies (UK) Ltd.
+// This file is part of OpenEthereum.
+
+// OpenEthereum is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+
+// OpenEthereum is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with OpenEthereum.  If not, see <http://www.gnu.org/licenses/>.
+
+use sp_core::{U256, H256};
+use serde::{Serialize, Serializer};
+use parity_scale_codec::{Decode, Encode};
+
+/// The result of an `eth_getWork` call: it differs based on an option
+/// whether to send the block number.
+#[derive(Debug, PartialEq, Eq, Clone)]
+pub struct Work {
+    /// The proof-of-work hash.
+    pub pow_hash: H256,
+    /// The seed hash.
+    pub seed_hash: H256,
+    /// The target.
+    pub target: H256,
+    /// The block number: this isn't always stored.
+    pub number: Option<u64>,
+}
+
+impl Serialize for Work {
+    fn serialize<S>(&self, s: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        match self.number.as_ref() {
+            Some(num) => (
+                &self.pow_hash,
+                &self.seed_hash,
+                &self.target,
+                U256::from(*num),
+            )
+                .serialize(s),
+            None => (&self.pow_hash, &self.seed_hash, &self.target).serialize(s),
+        }
+    }
+}
diff --git a/docker-compose.yml b/docker-compose.yml
index cfc4437b..3e8fd562 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,17 +1,52 @@
-version: "3.2"
-
+version: "3.3"
 services:
-  dev:
-    container_name: node-template
-    image: paritytech/ci-linux:974ba3ac-20201006
-    working_dir: /var/www/node-template
+  bootnode:
+    build: .
+    container_name: bootnode
+    image: metaverse-pow:ver1
+    user: root
+    volumes:
+        - "/tmp:/tmp"
+    ports:
+        - "9333:9933"
+    networks:
+        pow-net:
+          ipv4_address: 172.100.0.10
+    command: "--name bootnode --validator --rpc-cors all --base-path /tmp/bootnode --node-key 0000000000000000000000000000000000000000000000000000000000000111"
+  node-01:
+    build: .
+    container_name: node01
+    image: metaverse-pow:ver1
+    user: root
+    volumes:
+        - "/tmp:/tmp"
     ports:
-      - "9944:9944"
-    environment:
-      - CARGO_HOME=/var/www/node-template/.cargo
+        - "9334:9933"
+    networks:
+        pow-net:
+          ipv4_address: 172.100.0.20
+    command: "--name node01 --validator --rpc-cors all --base-path /tmp/node01 --bootnodes /ip4/172.100.0.10/tcp/30333/p2p/12D3KooWRBaMZHnFYtT1B143sSLHkx8G6ysPSg8PMzqXkymm38Ld"
+    depends_on: 
+        - bootnode
+  node-02:
+    build: .
+    container_name: node02
+    image: metaverse-pow:ver1
+    user: root
     volumes:
-      - .:/var/www/node-template
-      - type: bind
-        source: ./.local
-        target: /root/.local
-    command: bash -c "cargo build --release && ./target/release/node-template --dev --ws-external"
+        - "/tmp:/tmp"
+    ports:
+        - "9335:9933"
+    networks:
+        pow-net:
+          ipv4_address: 172.100.0.30
+    depends_on: 
+        - bootnode
+    command: "--name node02 --validator --rpc-cors all --base-path /tmp/node02 --bootnodes /ip4/172.100.0.10/tcp/30333/p2p/12D3KooWRBaMZHnFYtT1B143sSLHkx8G6ysPSg8PMzqXkymm38Ld"
+
+networks:
+    pow-net:
+        driver: bridge
+        ipam:
+            config:
+                - subnet: 172.100.0.0/16
diff --git a/node/Cargo.toml b/node/Cargo.toml
index 08079d39..72b56f11 100644
--- a/node/Cargo.toml
+++ b/node/Cargo.toml
@@ -54,6 +54,7 @@ sp-inherents = '3.0.0'
 sp-runtime = '3.0.0'
 sp-transaction-pool = '3.0.0'
 substrate-frame-rpc-system = '3.0.0'
+sp-timestamp = '3.0'
 
 pallet-evm = '3.0.0'
 pallet-ethereum = '1.0.0'
@@ -65,10 +66,21 @@ fc-rpc-core = '1.0.0'
 
 fc-mapping-sync = '1.0.0'
 
-
 # local dependencies
 metaverse-vm-runtime = { path = '../runtime', version = '0.2.1' }
 
+# Ethereum
+# serde = "1.0"
+# serde_derive = "1.0"
+# serde_json = "1.0"
+parking_lot = "0.11.1"
+ethereum-types = "0.9.2"
+parity-scale-codec = '2.0'
+sc-consensus-pow = { path = "../client/consensus/consensus-pow" }
+ethash = { path = "../client/consensus/ethash" }
+ethpow = { path = "../client/consensus/ethpow" }
+ethash-rpc = { path = "../client/ethash-rpc" }
+
 [features]
 default = []
 runtime-benchmarks = ['metaverse-vm-runtime/runtime-benchmarks']
diff --git a/node/src/chain_spec.rs b/node/src/chain_spec.rs
index 4d963082..41935da5 100644
--- a/node/src/chain_spec.rs
+++ b/node/src/chain_spec.rs
@@ -1,6 +1,6 @@
 use sp_core::{Pair, Public, sr25519};
 use metaverse_vm_runtime::{
-	AccountId, AuraConfig, BalancesConfig, GenesisConfig, GrandpaConfig,
+	AccountId, BalancesConfig, GenesisConfig, GrandpaConfig,
 	SudoConfig, SystemConfig, EVMConfig, EthereumConfig, WASM_BINARY, Signature
 };
 use sp_consensus_aura::sr25519::AuthorityId as AuraId;
@@ -194,9 +194,9 @@ fn testnet_genesis(
 			// Configure endowed accounts with initial balance of 1 << 60.
 			balances: endowed_accounts.iter().cloned().map(|k|(k, 1 << 60)).collect(),
 		}),
-		pallet_aura: Some(AuraConfig {
-			authorities: initial_authorities.iter().map(|x| (x.0.clone())).collect(),
-		}),
+		// pallet_aura: Some(AuraConfig {
+		// 	authorities: initial_authorities.iter().map(|x| (x.0.clone())).collect(),
+		// }),
 		pallet_grandpa: Some(GrandpaConfig {
 			authorities: initial_authorities.iter().map(|x| (x.1.clone(), 1)).collect(),
 		}),
diff --git a/node/src/rpc.rs b/node/src/rpc.rs
index f99ec1d8..dc9f43b5 100644
--- a/node/src/rpc.rs
+++ b/node/src/rpc.rs
@@ -18,6 +18,8 @@ use sc_network::NetworkService;
 use jsonrpc_pubsub::manager::SubscriptionManager;
 use pallet_ethereum::EthereumStorageSchema;
 use fc_rpc::{StorageOverride, SchemaV1Override, };
+use futures::channel::mpsc::Sender;
+use ethash_rpc::EtheminerCmd;
 
 /// Full client dependencies.
 pub struct FullDeps<C, P> {
@@ -41,6 +43,8 @@ pub struct FullDeps<C, P> {
 	pub backend: Arc<fc_db::Backend<Block>>,
     /// Maximum number of logs in a query.
 	pub max_past_logs: u32,
+	/// A command stream to send commands to ethash consensus engine
+	pub command_sink: Sender<EtheminerCmd<Hash>>,
 }
 
 /// Instantiate all Full RPC extensions.
@@ -81,6 +85,7 @@ pub fn create_full<C, P, BE>(
 		backend,
 		enable_dev_signer,
         max_past_logs,
+		command_sink,
 	} = deps;
 
 	io.extend_with(
@@ -149,6 +154,11 @@ pub fn create_full<C, P, BE>(
 		))
 	);
 
+	// Add Ethash RPC
+	io.extend_with(ethash_rpc::EthashRpc::to_delegate(
+		ethash_rpc::EthashData::new(client, command_sink),
+	));
+
 	io
 }
 
diff --git a/node/src/service.rs b/node/src/service.rs
index b6c48061..6ee0bb6a 100644
--- a/node/src/service.rs
+++ b/node/src/service.rs
@@ -1,6 +1,6 @@
 //! Service and ServiceFactory implementation. Specialized wrapper over substrate service.
 
-use std::{sync::{Arc, Mutex}, time::Duration, collections::{HashMap, BTreeMap}};
+use std::{sync::{Arc, Mutex}, time::{Duration, SystemTime, UNIX_EPOCH}, collections::{HashMap, BTreeMap}};
 use fc_rpc_core::types::{FilterPool, PendingTransactions};
 use sc_client_api::{ExecutorProvider, RemoteBackend};
 use metaverse_vm_runtime::{self, opaque::Block, RuntimeApi};
@@ -8,12 +8,25 @@ use sc_service::{error::Error as ServiceError, Configuration, TaskManager, BaseP
 use sp_inherents::InherentDataProviders;
 use sc_executor::native_executor_instance;
 pub use sc_executor::NativeExecutor;
-use sp_consensus_aura::sr25519::AuthorityPair as AuraPair;
-use sc_finality_grandpa::SharedVoterState;
+use sc_finality_grandpa::{SharedVoterState, GrandpaBlockImport};
 use sc_keystore::LocalKeystore;
-
 use crate::cli::Cli;
 
+use futures::prelude::*;
+use parking_lot::{Mutex as PMutex};
+use sp_consensus::import_queue::BasicQueue;
+use sp_api::{ProvideRuntimeApi, TransactionFor};
+use sp_runtime::traits::{Block as BlockT, Header as HeaderT, UniqueSaturatedInto};
+use ethash::{self, SeedHashCompute};
+use ethpow::{MinimalEthashAlgorithm, EthashAlgorithm, WorkSeal};
+use ethash_rpc::{self, EtheminerCmd, Work, RpcError};
+use sc_consensus_pow::{PowAlgorithm, MiningWorker, MiningMetadata, MiningBuild};
+use sp_core::{U256, H256};
+use ethereum_types::{self, U256 as EU256, H256 as EH256};
+use parity_scale_codec::{Decode, Encode};
+use log::{error, info, debug, trace, warn};
+
+
 // Our native executor instance.
 native_executor_instance!(
 	pub Executor,
@@ -26,6 +39,18 @@ type FullClient = sc_service::TFullClient<Block, RuntimeApi, Executor>;
 type FullBackend = sc_service::TFullBackend<Block>;
 type FullSelectChain = sc_consensus::LongestChain<FullBackend, Block>;
 
+// :TODO: fix timestamp
+pub fn build_inherent_data_providers() -> Result<InherentDataProviders, ServiceError> {
+	let providers = InherentDataProviders::new();
+
+	providers
+		.register_provider(sp_timestamp::InherentDataProvider)
+		.map_err(Into::into)
+		.map_err(sp_consensus::error::Error::InherentData)?;
+
+	Ok(providers)
+}
+
 pub fn open_frontier_backend(config: &Configuration) -> Result<Arc<fc_db::Backend<Block>>, String> {
 	let config_dir = config.base_path.as_ref()
 		.map(|base_path| base_path.config_dir(config.chain_spec.id()))
@@ -45,24 +70,27 @@ pub fn open_frontier_backend(config: &Configuration) -> Result<Arc<fc_db::Backen
 
 pub fn new_partial(config: &Configuration, _cli: &Cli) -> Result<sc_service::PartialComponents<
 	FullClient, FullBackend, FullSelectChain,
-	sp_consensus::DefaultImportQueue<Block, FullClient>,
+	BasicQueue<Block, TransactionFor<FullClient, Block>>,
 	sc_transaction_pool::FullPool<Block, FullClient>,
 	(
-		sc_consensus_aura::AuraBlockImport<
+		sc_consensus_pow::PowBlockImport<
 			Block,
+			GrandpaBlockImport<FullBackend, Block, FullClient, FullSelectChain>,
 			FullClient,
-			sc_finality_grandpa::GrandpaBlockImport<FullBackend, Block, FullClient, FullSelectChain>,
-			AuraPair
+			FullSelectChain,
+			EthashAlgorithm<FullClient>,
+			impl sp_consensus::CanAuthorWith<Block>,
 		>,
 		sc_finality_grandpa::LinkHalf<Block, FullClient, FullSelectChain>,
         PendingTransactions, Option<FilterPool>, Arc<fc_db::Backend<Block>>,
+		EthashAlgorithm<FullClient>,
 	)
 >, ServiceError> {
 	if config.keystore_remote.is_some() {
 		return Err(ServiceError::Other(
 			format!("Remote Keystores are not supported.")))
 	}
-	let inherent_data_providers = InherentDataProviders::new();
+	let inherent_data_providers = build_inherent_data_providers()?;
 
     let (client, backend, keystore_container, task_manager) =
 		sc_service::new_full_parts::<Block, RuntimeApi, Executor>(
@@ -94,19 +122,26 @@ pub fn new_partial(config: &Configuration, _cli: &Cli) -> Result<sc_service::Par
 		select_chain.clone(),
 	)?;
 
-	let aura_block_import = sc_consensus_aura::AuraBlockImport::<_, _, _, AuraPair>::new(
-		grandpa_block_import.clone(), client.clone(),
-	);
+	let can_author_with = sp_consensus::CanAuthorWithNativeVersion::new(client.executor().clone());
+	let ethash_alg = EthashAlgorithm::new(client.clone());
 
-	let import_queue = sc_consensus_aura::import_queue::<_, _, _, AuraPair, _, _>(
-		sc_consensus_aura::slot_duration(&*client)?,
-		aura_block_import.clone(),
-		Some(Box::new(grandpa_block_import.clone())),
+	let pow_block_import = sc_consensus_pow::PowBlockImport::new(
+		grandpa_block_import,
 		client.clone(),
+		ethash_alg.clone(),
+		0, // check inherents starting at block 0
+		select_chain.clone(),
+		inherent_data_providers.clone(),
+		can_author_with,
+	);
+
+	let import_queue = sc_consensus_pow::import_queue(
+		Box::new(pow_block_import.clone()),
+		None,
+		ethash_alg.clone(),
 		inherent_data_providers.clone(),
 		&task_manager.spawn_handle(),
 		config.prometheus_registry(),
-		sp_consensus::CanAuthorWithNativeVersion::new(client.executor().clone()),
 	)?;
 
 	Ok(sc_service::PartialComponents {
@@ -118,9 +153,11 @@ pub fn new_partial(config: &Configuration, _cli: &Cli) -> Result<sc_service::Par
 		select_chain,
 		transaction_pool,
 		inherent_data_providers,
-		other: (aura_block_import, grandpa_link, pending_transactions,
+		other: (pow_block_import, grandpa_link, 
+				pending_transactions,
 				filter_pool,
 				frontier_backend,
+				ethash_alg,
 				),
 	})
 }
@@ -146,7 +183,7 @@ pub fn new_full(mut config: Configuration, cli: &Cli) -> Result<TaskManager, Ser
 		select_chain,
 		transaction_pool,
 		inherent_data_providers,
-		other: (block_import, grandpa_link, pending_transactions, filter_pool, frontier_backend),
+		other: (pow_block_import, grandpa_link, pending_transactions, filter_pool, frontier_backend, ethash_alg),
 	} = new_partial(&config, cli)?;
 
 	if let Some(url) = &config.keystore_remote {
@@ -172,7 +209,8 @@ pub fn new_full(mut config: Configuration, cli: &Cli) -> Result<TaskManager, Ser
 			block_announce_validator_builder: None,
 		})?;
 
-    //let (command_sink, commands_stream) = futures::channel::mpsc::channel(1000);
+	// Channel for the rpc handler to communicate with the authorship task.
+	let (command_sink, commands_stream) = futures::channel::mpsc::channel(1000);
 
 	if config.offchain_worker.enabled {
 		sc_service::build_offchain_workers(
@@ -210,7 +248,7 @@ pub fn new_full(mut config: Configuration, cli: &Cli) -> Result<TaskManager, Ser
 				filter_pool: filter_pool.clone(),
 				backend: frontier_backend.clone(),
 				max_past_logs,
-				//command_sink: Some(command_sink.clone()),
+				command_sink: command_sink.clone(),
 			};
 
 			crate::rpc::create_full(deps, subscription_task_executor.clone())
@@ -235,33 +273,40 @@ pub fn new_full(mut config: Configuration, cli: &Cli) -> Result<TaskManager, Ser
 	)?;
 
 	if role.is_authority() {
-		let proposer_factory = sc_basic_authorship::ProposerFactory::new(
+		let proposer = sc_basic_authorship::ProposerFactory::new(
 			task_manager.spawn_handle(),
 			client.clone(),
-			transaction_pool,
+			transaction_pool.clone(),
 			prometheus_registry.as_ref(),
 		);
 
 		let can_author_with =
 			sp_consensus::CanAuthorWithNativeVersion::new(client.executor().clone());
 
-		let aura = sc_consensus_aura::start_aura::<_, _, _, _, _, AuraPair, _, _, _,_>(
-			sc_consensus_aura::slot_duration(&*client)?,
+		let (worker, worker_task) = sc_consensus_pow::start_mining_worker(
+			Box::new(pow_block_import),
 			client.clone(),
 			select_chain,
-			block_import,
-			proposer_factory,
+			ethash_alg,
+			proposer,
 			network.clone(),
-			inherent_data_providers.clone(),
-			force_authoring,
-			backoff_authoring_blocks,
-			keystore_container.sync_keystore(),
+			None,
+			inherent_data_providers,
+			// time to wait for a new block before starting to mine a new one
+			Duration::from_secs(10),
+			// how long to take to actually build the block (i.e. executing extrinsics)
+			Duration::from_secs(10),
 			can_author_with,
-		)?;
+		);
 
-		// the AURA authoring task is considered essential, i.e. if it
-		// fails we take down the service with it.
-		task_manager.spawn_essential_handle().spawn_blocking("aura", aura);
+		task_manager
+			.spawn_essential_handle()
+			.spawn_blocking("pow", worker_task);
+		
+		// Start Mining
+		task_manager
+			.spawn_essential_handle()
+			.spawn_blocking("mining", run_mining_svc(worker.clone(), commands_stream));
 	}
 
 	// if the node isn't actively participating in consensus then it doesn't
@@ -334,20 +379,27 @@ pub fn new_light(mut config: Configuration) -> Result<TaskManager, ServiceError>
 		select_chain.clone(),
 	)?;
 
-	let aura_block_import = sc_consensus_aura::AuraBlockImport::<_, _, _, AuraPair>::new(
-		grandpa_block_import.clone(),
+	let inherent_data_providers = build_inherent_data_providers()?;
+	let ethash_alg = EthashAlgorithm::new(client.clone());
+
+	let pow_block_import = sc_consensus_pow::PowBlockImport::new(
+		grandpa_block_import,
 		client.clone(),
+		ethash_alg.clone(),
+		0, // check inherents starting at block 0
+		select_chain,
+		inherent_data_providers.clone(),
+		// FixMe #375
+		sp_consensus::AlwaysCanAuthor,
 	);
 
-	let import_queue = sc_consensus_aura::import_queue::<_, _, _, AuraPair, _, _>(
-		sc_consensus_aura::slot_duration(&*client)?,
-		aura_block_import,
-		Some(Box::new(grandpa_block_import)),
-		client.clone(),
-		InherentDataProviders::new(),
+	let import_queue = sc_consensus_pow::import_queue(
+		Box::new(pow_block_import),
+		None,
+		ethash_alg.clone(),
+		inherent_data_providers,
 		&task_manager.spawn_handle(),
 		config.prometheus_registry(),
-		sp_consensus::NeverCanAuthor,
 	)?;
 
 	let (network, network_status_sinks, system_rpc_tx, network_starter) =
@@ -386,3 +438,66 @@ pub fn new_light(mut config: Configuration) -> Result<TaskManager, ServiceError>
 
 	Ok(task_manager)
 }
+
+
+pub async fn run_mining_svc<B, Algorithm, C, CS>(
+	worker : Arc<PMutex<MiningWorker<B, Algorithm, C>>>,
+	mut commands_stream: CS,
+)
+	where 
+	B: BlockT<Hash = H256>,
+	Algorithm: PowAlgorithm<B, Difficulty = U256>,
+	C: sp_api::ProvideRuntimeApi<B>,
+	CS: Stream<Item=EtheminerCmd<<B as BlockT>::Hash>> + Unpin + 'static,
+{
+	let seed_compute = SeedHashCompute::default();
+
+	while let Some(command) = commands_stream.next().await {
+		match command {
+			EtheminerCmd::GetWork { mut sender } => {
+				let metadata = worker.lock().metadata();
+				if let Some(metadata) = metadata {
+					let nr :u64 = UniqueSaturatedInto::<u64>::unique_saturated_into(metadata.number);
+					let pow_hash:H256 = metadata.pre_hash;
+					let seed_hash:H256 = seed_compute.hash_block_number(nr).into();
+					let tmp:[u8; 32] = metadata.difficulty.into();
+					let tmp:[u8; 32] = ethash::difficulty_to_boundary(&EU256::from(tmp)).into();
+					let target:H256 = H256::from(tmp);
+
+					let ret = Ok(Work { 
+						pow_hash, 
+						seed_hash,
+						target, 
+						number: Some(nr),
+					 });
+
+					ethash_rpc::send_result(&mut sender, ret)
+					// ethash_rpc::send_result(&mut sender, future.await)
+				} else {
+					ethash_rpc::send_result(&mut sender, Err(RpcError::NoWork))
+				}
+			}
+			EtheminerCmd::SubmitWork {  nonce, pow_hash, mix_digest, mut sender } => {
+				let mut worker = worker.lock();
+				let metadata = worker.metadata();
+				if let Some(metadata) = metadata {
+					let non_nr :u64 = UniqueSaturatedInto::<u64>::unique_saturated_into(nonce);
+					let header_nr :u64 = UniqueSaturatedInto::<u64>::unique_saturated_into(metadata.number);
+					let timestamp :u64 = SystemTime::now().duration_since(UNIX_EPOCH).unwrap().as_secs();
+					let seal = WorkSeal{nonce:non_nr, pow_hash, mix_digest, difficulty:metadata.difficulty, header_nr, timestamp};
+					debug!(target:"pow", "worker.submit pow_hash: {}", pow_hash);
+					worker.submit(seal.encode());
+					ethash_rpc::send_result(&mut sender, Ok(true))
+				} else {
+					ethash_rpc::send_result(&mut sender, Err(RpcError::NoMetaData))
+				}
+
+						
+			}
+			EtheminerCmd::SubmitHashrate { hash, mut sender } => {
+				
+			}
+		}
+	}
+}
+
diff --git a/runtime/src/lib.rs b/runtime/src/lib.rs
index a17fc9f6..d61dd634 100644
--- a/runtime/src/lib.rs
+++ b/runtime/src/lib.rs
@@ -17,7 +17,7 @@ use sp_runtime::traits::{
 	BlakeTwo256, Block as BlockT, AccountIdLookup, Verify, IdentifyAccount, NumberFor,
 };
 use sp_api::impl_runtime_apis;
-use sp_consensus_aura::sr25519::AuthorityId as AuraId;
+//use sp_consensus_aura::sr25519::AuthorityId as AuraId;
 use pallet_grandpa::{AuthorityId as GrandpaId, AuthorityList as GrandpaAuthorityList};
 use pallet_grandpa::fg_primitives;
 use sp_version::RuntimeVersion;
@@ -95,7 +95,7 @@ pub mod opaque {
 
 	impl_opaque_keys! {
 		pub struct SessionKeys {
-			pub aura: Aura,
+			//pub aura: Aura,
 			pub grandpa: Grandpa,
 		}
 	}
@@ -124,7 +124,8 @@ pub const VERSION: RuntimeVersion = RuntimeVersion {
 /// up by `pallet_aura` to implement `fn slot_duration()`.
 ///
 /// Change this to adjust the block time.
-pub const MILLISECS_PER_BLOCK: u64 = 6000;
+// :TODO: may need discussion on the minimum time value between blocks
+pub const MILLISECS_PER_BLOCK: u64 = 100; //6000;
 
 pub const SLOT_DURATION: u64 = MILLISECS_PER_BLOCK;
 
@@ -207,9 +208,9 @@ impl frame_system::Config for Runtime {
 	type SS58Prefix = SS58Prefix;
 }
 
-impl pallet_aura::Config for Runtime {
-	type AuthorityId = AuraId;
-}
+// impl pallet_aura::Config for Runtime {
+// 	type AuthorityId = AuraId;
+// }
 
 impl pallet_grandpa::Config for Runtime {
 	type Event = Event;
@@ -237,7 +238,7 @@ parameter_types! {
 impl pallet_timestamp::Config for Runtime {
 	/// A timestamp: milliseconds since the unix epoch.
 	type Moment = u64;
-	type OnTimestampSet = Aura;
+	type OnTimestampSet = ();
 	type MinimumPeriod = MinimumPeriod;
 	type WeightInfo = ();
 }
@@ -321,23 +322,24 @@ impl pallet_evm::Config for Runtime {
 	type OnChargeTransaction = ();
 }
 
-pub struct EthereumFindAuthor<F>(PhantomData<F>);
-impl<F: FindAuthor<u32>> FindAuthor<H160> for EthereumFindAuthor<F>
-{
-	fn find_author<'a, I>(digests: I) -> Option<H160> where
-		I: 'a + IntoIterator<Item=(ConsensusEngineId, &'a [u8])>
-	{
-		if let Some(author_index) = F::find_author(digests) {
-			let authority_id = Aura::authorities()[author_index as usize].clone();
-			return Some(H160::from_slice(&authority_id.to_raw_vec()[4..24]));
-		}
-		None
-	}
-}
+// pub struct EthereumFindAuthor<F>(PhantomData<F>);
+// impl<F: FindAuthor<u32>> FindAuthor<H160> for EthereumFindAuthor<F>
+// {
+// 	fn find_author<'a, I>(digests: I) -> Option<H160> where
+// 		I: 'a + IntoIterator<Item=(ConsensusEngineId, &'a [u8])>
+// 	{
+// 		if let Some(author_index) = F::find_author(digests) {
+// 			let authority_id = Aura::authorities()[author_index as usize].clone();
+// 			return Some(H160::from_slice(&authority_id.to_raw_vec()[4..24]));
+// 		}
+// 		None
+// 	}
+// }
 
 impl pallet_ethereum::Config for Runtime {
 	type Event = Event;
-	type FindAuthor = EthereumFindAuthor<Aura>;
+	// () means we will never record a block author in the Ethereum-formatted blocks
+	type FindAuthor = (); //EthereumFindAuthor<Aura>;
 	type StateRoot = pallet_ethereum::IntermediateStateRoot;
 }
 
@@ -351,7 +353,7 @@ construct_runtime!(
 		System: frame_system::{Module, Call, Config, Storage, Event<T>},
 		RandomnessCollectiveFlip: pallet_randomness_collective_flip::{Module, Call, Storage},
 		Timestamp: pallet_timestamp::{Module, Call, Storage, Inherent},
-		Aura: pallet_aura::{Module, Config<T>},
+		//Aura: pallet_aura::{Module, Config<T>},
 		Grandpa: pallet_grandpa::{Module, Call, Storage, Config, Event},
 		Balances: pallet_balances::{Module, Call, Storage, Config<T>, Event<T>},
 		TransactionPayment: pallet_transaction_payment::{Module, Storage},
@@ -473,15 +475,15 @@ impl_runtime_apis! {
 		}
 	}
 
-	impl sp_consensus_aura::AuraApi<Block, AuraId> for Runtime {
-		fn slot_duration() -> u64 {
-			Aura::slot_duration()
-		}
+	// impl sp_consensus_aura::AuraApi<Block, AuraId> for Runtime {
+	// 	fn slot_duration() -> u64 {
+	// 		Aura::slot_duration()
+	// 	}
 
-		fn authorities() -> Vec<AuraId> {
-			Aura::authorities()
-		}
-	}
+	// 	fn authorities() -> Vec<AuraId> {
+	// 		Aura::authorities()
+	// 	}
+	// }
 
 	impl sp_session::SessionKeys<Block> for Runtime {
 		fn generate_session_keys(seed: Option<Vec<u8>>) -> Vec<u8> {