emv: add BlockHeader trait and default fill_block_env (#10993)

crates/ethereum/evm/src/lib.rs

@@ -122,26 +122,6 @@ impl ConfigureEvmEnv for EthEvmConfig {
         cfg_env.handler_cfg.spec_id = spec_id;
     }
 
-    fn fill_block_env(&self, block_env: &mut BlockEnv, header: &Self::Header, after_merge: bool) {
-        block_env.number = U256::from(header.number);
-        block_env.coinbase = header.beneficiary;
-        block_env.timestamp = U256::from(header.timestamp);
-        if after_merge {
-            block_env.prevrandao = Some(header.mix_hash);
-            block_env.difficulty = U256::ZERO;
-        } else {
-            block_env.difficulty = header.difficulty;
-            block_env.prevrandao = None;
-        }
-        block_env.basefee = U256::from(header.base_fee_per_gas.unwrap_or_default());
-        block_env.gas_limit = U256::from(header.gas_limit);
-
-        // EIP-4844 excess blob gas of this block, introduced in Cancun
-        if let Some(excess_blob_gas) = header.excess_blob_gas {
-            block_env.set_blob_excess_gas_and_price(excess_blob_gas);
-        }
-    }
-
     fn next_cfg_and_block_env(
         &self,
         parent: &Self::Header,

crates/evm/Cargo.toml

@@ -15,6 +15,7 @@ workspace = true
 reth-chainspec.workspace = true
 reth-execution-errors.workspace = true
 reth-primitives.workspace = true
+reth-primitives-traits.workspace = true
 revm-primitives.workspace = true
 reth-prune-types.workspace = true
 reth-metrics = { workspace = true, optional = true }

crates/evm/src/lib.rs

@@ -15,6 +15,7 @@ use core::ops::Deref;
 
 use crate::builder::RethEvmBuilder;
 use reth_primitives::{Address, TransactionSigned, TransactionSignedEcRecovered, B256, U256};
+use reth_primitives_traits::BlockHeader;
 use revm::{Database, Evm, GetInspector};
 use revm_primitives::{
     BlockEnv, Bytes, CfgEnvWithHandlerCfg, Env, EnvWithHandlerCfg, SpecId, TxEnv,
@@ -109,7 +110,7 @@ pub trait ConfigureEvm: ConfigureEvmEnv {
 #[auto_impl::auto_impl(&, Arc)]
 pub trait ConfigureEvmEnv: Send + Sync + Unpin + Clone + 'static {
     /// The header type used by the EVM.
-    type Header;
+    type Header: BlockHeader;
 
     /// Returns a [`TxEnv`] from a [`TransactionSignedEcRecovered`].
     fn tx_env(&self, transaction: &TransactionSignedEcRecovered) -> TxEnv {
@@ -142,7 +143,25 @@ pub trait ConfigureEvmEnv: Send + Sync + Unpin + Clone + 'static {
     );
 
     /// Fill [`BlockEnv`] field according to the chain spec and given header
-    fn fill_block_env(&self, block_env: &mut BlockEnv, header: &Self::Header, after_merge: bool);
+    fn fill_block_env(&self, block_env: &mut BlockEnv, header: &Self::Header, after_merge: bool) {
+        block_env.number = U256::from(header.number());
+        block_env.coinbase = header.beneficiary();
+        block_env.timestamp = U256::from(header.timestamp());
+        if after_merge {
+            block_env.prevrandao = Some(header.mix_hash());
+            block_env.difficulty = U256::ZERO;
+        } else {
+            block_env.difficulty = header.difficulty();
+            block_env.prevrandao = None;
+        }
+        block_env.basefee = U256::from(header.base_fee_per_gas().unwrap_or_default());
+        block_env.gas_limit = U256::from(header.gas_limit());
+
+        // EIP-4844 excess blob gas of this block, introduced in Cancun
+        if let Some(excess_blob_gas) = header.excess_blob_gas() {
+            block_env.set_blob_excess_gas_and_price(excess_blob_gas);
+        }
+    }
 
     /// Convenience function to call both [`fill_cfg_env`](ConfigureEvmEnv::fill_cfg_env) and
     /// [`ConfigureEvmEnv::fill_block_env`].

crates/optimism/evm/src/lib.rs

@@ -127,26 +127,6 @@ impl ConfigureEvmEnv for OptimismEvmConfig {
         cfg_env.handler_cfg.is_optimism = self.chain_spec.is_optimism();
     }
 
-    fn fill_block_env(&self, block_env: &mut BlockEnv, header: &Self::Header, after_merge: bool) {
-        block_env.number = U256::from(header.number);
-        block_env.coinbase = header.beneficiary;
-        block_env.timestamp = U256::from(header.timestamp);
-        if after_merge {
-            block_env.prevrandao = Some(header.mix_hash);
-            block_env.difficulty = U256::ZERO;
-        } else {
-            block_env.difficulty = header.difficulty;
-            block_env.prevrandao = None;
-        }
-        block_env.basefee = U256::from(header.base_fee_per_gas.unwrap_or_default());
-        block_env.gas_limit = U256::from(header.gas_limit);
-
-        // EIP-4844 excess blob gas of this block, introduced in Cancun
-        if let Some(excess_blob_gas) = header.excess_blob_gas {
-            block_env.set_blob_excess_gas_and_price(excess_blob_gas);
-        }
-    }
-
     fn next_cfg_and_block_env(
         &self,
         parent: &Self::Header,

crates/primitives-traits/src/header/mod.rs

@@ -527,3 +527,64 @@ impl<'a> arbitrary::Arbitrary<'a> for Header {
         ))
     }
 }
+
+/// Trait for extracting specific Ethereum block data from a header
+pub trait BlockHeader {
+    /// Retrieves the beneficiary (miner) of the block
+    fn beneficiary(&self) -> Address;
+
+    /// Retrieves the difficulty of the block
+    fn difficulty(&self) -> U256;
+
+    /// Retrieves the block number
+    fn number(&self) -> BlockNumber;
+
+    /// Retrieves the gas limit of the block
+    fn gas_limit(&self) -> u64;
+
+    /// Retrieves the timestamp of the block
+    fn timestamp(&self) -> u64;
+
+    /// Retrieves the mix hash of the block
+    fn mix_hash(&self) -> B256;
+
+    /// Retrieves the base fee per gas of the block, if available
+    fn base_fee_per_gas(&self) -> Option<u64>;
+
+    /// Retrieves the excess blob gas of the block, if available
+    fn excess_blob_gas(&self) -> Option<u64>;
+}
+
+impl BlockHeader for Header {
+    fn beneficiary(&self) -> Address {
+        self.beneficiary
+    }
+
+    fn difficulty(&self) -> U256 {
+        self.difficulty
+    }
+
+    fn number(&self) -> BlockNumber {
+        self.number
+    }
+
+    fn gas_limit(&self) -> u64 {
+        self.gas_limit
+    }
+
+    fn timestamp(&self) -> u64 {
+        self.timestamp
+    }
+
+    fn mix_hash(&self) -> B256 {
+        self.mix_hash
+    }
+
+    fn base_fee_per_gas(&self) -> Option<u64> {
+        self.base_fee_per_gas
+    }
+
+    fn excess_blob_gas(&self) -> Option<u64> {
+        self.excess_blob_gas
+    }
+}

crates/primitives-traits/src/lib.rs

@@ -45,4 +45,4 @@ pub use storage::StorageEntry;
 pub mod header;
 #[cfg(any(test, feature = "arbitrary", feature = "test-utils"))]
 pub use header::test_utils;
-pub use header::{Header, HeaderError, SealedHeader};
+pub use header::{BlockHeader, Header, HeaderError, SealedHeader};