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Configuration.md

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By default, the mainnet bcoin config file will reside in ~/.bcoin/bcoin.conf.

All bcoin configuration options work in the config file, CLI arguments, and process environment (with a BCOIN_ prefix).

Datadir/Prefix

Bcoin's datadir is determined by the prefix option.

Example:

$ bcoin --prefix ~/.bcoin_spv --spv

Will create a datadir of ~/.bcoin_spv, containing a chain database, wallet database and log file.

Common Options

  • config: Points to a custom config file, not in the prefix directory.
  • network: Which network's chainparams to use for the node (main, testnet, regtest, or segnet4) (default: main).
  • workers: Whether to use a worker process pool for transaction verification (default: true).
  • workers-size: Number of worker processes to spawn for transaction verification. By default, the worker pool will be sized based on the number of CPUs/cores in the machine.
  • workers-timeout: Worker process execution timeout in milliseconds (default: 120000).
  • sigcache-size: Max number of items in signature cache.

Node Options

  • prefix: The data directory (stores databases, logs, and configs) (default=~/.bcoin).
  • db: Which database backend to use (default=leveldb).
  • max-files: Max open files for leveldb. Higher generally means more disk page cache benefits, but also more memory usage (default: 64).
  • cache-size: Size (in MB) of leveldb cache and write buffer (default: 32mb).

Logger Options

  • log-level: error, warning, info, debug, or spam (default: debug).
  • log-console: true or false - whether to actually write to stdout/stderr if foregrounded (default: true).
  • log-file: Whether to use a log file (default: true).

Chain Options

Note that certain chain options affect the format and indexing of the chain database and must be passed in consistently each time.

  • prune: Prune from the last 288 blocks (default: false).
  • checkpoints: Use checkpoints and getheaders for the initial sync (default: true).
  • coin-cache: The size (in MB) of the in-memory UTXO cache. By default, there is no UTXO cache enabled. To get a good number of cache hits per block, the coin cache has to be fairly large (60-100mb recommended at least).
  • index-tx: Index transactions (enables transaction endpoints in REST api) (default: false).
  • index-address: Index transactions and utxos by address (default: false).

Mempool Options

  • mempool-size: Max mempool size in MB (default: 100).
  • replace-by-fee: Allow replace-by-fee transactions (default: false).
  • persistent-mempool: Save mempool to disk and read into memory on boot (default: false).

Pool Options

  • selfish: Enable "selfish" mode (no relaying of txes or blocks) (default: false).
  • compact: Enable compact block relay (default: true).
  • bip37: Enable serving of bip37 merkleblocks (default: false).
  • bip151: Enable bip151 peer-to-peer encryption (default: false).
  • listen: Accept incoming connections (default: true).
  • max-outbound: Max number of outbound connections (default: 8).
  • max-inbound: Max number of inbound connections (default: 30).
  • seeds: Custom list of DNS seeds (comma-separated).
  • host: Host to listen on (default: 0.0.0.0).
  • port: Port to listen on (default: 8333).
  • public-host: Public host to advertise on network.
  • public-port: Public port to advertise on network.
  • bip150: Enable bip150 peer auth (default: false).
  • identity-key: BIP150 identity key (32 byte hex string).
  • auth-peers: Path to authorized-peers file for BIP150.
  • known-peers: Path to known-peers file for BIP150.
  • nodes: List of target nodes to connect to (comma-separated).

Miner Options

  • coinbase-flags: Coinbase flags (default: mined by bcoin).
  • coinbase-address: List of payout addresses, randomly selected during block creation (comma-separated).
  • max-block-weight: Max block weight to mine (default: 4000000).
  • reserved-block-weight: Amount of space reserved for coinbase (default: 4000).
  • reserved-block-sigops: Amount of sigops reserved for coinbase (default: 400).

HTTP

  • http-host: HTTP host to listen on (default: 127.0.0.1).
  • http-port: HTTP port to listen on (default: 8332).
  • ssl-cert: Path to SSL cert.
  • ssl-key: Path to SSL key.
  • service-key: Service key (used for accessing wallet system only).
  • api-key: API key (used for accessing all node APIs).
  • wallet-auth: Enable token auth for wallets (default: false).
  • no-auth: Disable auth for API server and wallets (default: false).

Sample Config File

See https://github.com/bcoin-org/bcoin/blob/master/etc/sample.conf.