From 7fade4e21f6ca4b8837cbfd703fc756e289be262 Mon Sep 17 00:00:00 2001
From: deuszx <mateusz.gorski@linera.io>
Date: Thu, 16 Jan 2025 18:04:58 +0100
Subject: [PATCH] Serialize Keccak256 as array, not slice.

---
 linera-base/src/crypto.rs                  | 6 +++---
 linera-chain/src/chain.rs                  | 2 +-
 linera-chain/src/unit_tests/chain_tests.rs | 2 +-
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/linera-base/src/crypto.rs b/linera-base/src/crypto.rs
index 09f47431821..aa0e3e4d90b 100644
--- a/linera-base/src/crypto.rs
+++ b/linera-base/src/crypto.rs
@@ -166,7 +166,7 @@ impl Serialize for CryptoHash {
         if serializer.is_human_readable() {
             serializer.serialize_str(&self.to_string())
         } else {
-            serializer.serialize_newtype_struct("CryptoHash", &self.0)
+            serializer.serialize_newtype_struct("CryptoHash", &self.0 .0)
         }
     }
 }
@@ -183,10 +183,10 @@ impl<'de> Deserialize<'de> for CryptoHash {
         } else {
             #[derive(Deserialize)]
             #[serde(rename = "CryptoHash")]
-            struct Foo(B256);
+            struct Foo([u8; 32]);
 
             let value = Foo::deserialize(deserializer)?;
-            Ok(Self(value.0))
+            Ok(Self(value.0.into()))
         }
     }
 }
diff --git a/linera-chain/src/chain.rs b/linera-chain/src/chain.rs
index 99f8f2fb3cc..0d5fa35cd0b 100644
--- a/linera-chain/src/chain.rs
+++ b/linera-chain/src/chain.rs
@@ -148,7 +148,7 @@ static STATE_HASH_COMPUTATION_LATENCY: LazyLock<HistogramVec> = LazyLock::new(||
 });
 
 /// The BCS-serialized size of an empty `ExecutedBlock`.
-const EMPTY_EXECUTED_BLOCK_SIZE: usize = 93;
+const EMPTY_EXECUTED_BLOCK_SIZE: usize = 91;
 
 /// An origin, cursor and timestamp of a unskippable bundle in our inbox.
 #[derive(Debug, Clone, Serialize, Deserialize, async_graphql::SimpleObject)]
diff --git a/linera-chain/src/unit_tests/chain_tests.rs b/linera-chain/src/unit_tests/chain_tests.rs
index 9752e25fdfb..c504e11a47e 100644
--- a/linera-chain/src/unit_tests/chain_tests.rs
+++ b/linera-chain/src/unit_tests/chain_tests.rs
@@ -112,7 +112,7 @@ async fn test_block_size_limit() {
     let mut chain = ChainStateView::new(chain_id).await;
 
     // The size of the executed valid block below.
-    let maximum_executed_block_size = 713;
+    let maximum_executed_block_size = 707;
 
     // Initialize the chain.
     let mut config = make_open_chain_config();