feat: add ChainSpec AT to EngineTypes

crates/engine/primitives/Cargo.toml

@@ -12,7 +12,6 @@ workspace = true
 
 [dependencies]
 # reth
-reth-chainspec.workspace = true
 reth-execution-types.workspace = true
 reth-payload-primitives.workspace = true
 reth-primitives.workspace = true

crates/engine/primitives/src/lib.rs

@@ -11,7 +11,6 @@
 mod invalid_block_hook;
 pub use invalid_block_hook::InvalidBlockHook;
 
-use reth_chainspec::ChainSpec;
 pub use reth_payload_primitives::{
     BuiltPayload, EngineApiMessageVersion, EngineObjectValidationError, PayloadOrAttributes,
     PayloadTypes,
@@ -32,6 +31,9 @@ pub trait EngineTypes:
     + Serialize
     + 'static
 {
+    /// The chain specification of the node.
+    type ChainSpec: Send + Sync;
+
     /// Execution Payload V1 type.
     type ExecutionPayloadV1: DeserializeOwned + Serialize + Clone + Unpin + Send + Sync + 'static;
     /// Execution Payload V2 type.
@@ -44,7 +46,7 @@ pub trait EngineTypes:
     /// Validates the presence or exclusion of fork-specific fields based on the payload attributes
     /// and the message version.
     fn validate_version_specific_fields(
-        chain_spec: &ChainSpec,
+        chain_spec: &Self::ChainSpec,
         version: EngineApiMessageVersion,
         payload_or_attrs: PayloadOrAttributes<'_, Self::PayloadAttributes>,
     ) -> Result<(), EngineObjectValidationError>;

crates/ethereum/engine-primitives/src/lib.rs

@@ -36,6 +36,8 @@ impl PayloadTypes for EthEngineTypes {
 }
 
 impl EngineTypes for EthEngineTypes {
+    type ChainSpec = ChainSpec;
+
     type ExecutionPayloadV1 = ExecutionPayloadV1;
     type ExecutionPayloadV2 = ExecutionPayloadEnvelopeV2;
     type ExecutionPayloadV3 = ExecutionPayloadEnvelopeV3;

crates/node/types/src/lib.rs

@@ -39,7 +39,7 @@ pub trait NodeTypes: Send + Sync + Unpin + 'static {
 /// The type that configures an Ethereum-like node with an engine for consensus.
 pub trait NodeTypesWithEngine: NodeTypes {
     /// The node's engine types, defining the interaction with the consensus engine.
-    type Engine: EngineTypes;
+    type Engine: EngineTypes<ChainSpec = Self::ChainSpec>;
 }
 
 /// A helper trait that is downstream of the [`NodeTypesWithEngine`] trait and adds database to the
@@ -166,7 +166,7 @@ where
 impl<P, E, C> NodeTypesWithEngine for AnyNodeTypesWithEngine<P, E, C>
 where
     P: NodePrimitives + Send + Sync + Unpin + 'static,
-    E: EngineTypes + Send + Sync + Unpin,
+    E: EngineTypes<ChainSpec = C> + Send + Sync + Unpin,
     C: EthChainSpec,
 {
     type Engine = E;

crates/optimism/node/src/engine.rs

@@ -29,6 +29,8 @@ impl PayloadTypes for OptimismEngineTypes {
 }
 
 impl EngineTypes for OptimismEngineTypes {
+    type ChainSpec = ChainSpec;
+
     type ExecutionPayloadV1 = ExecutionPayloadV1;
     type ExecutionPayloadV2 = ExecutionPayloadEnvelopeV2;
     type ExecutionPayloadV3 = OptimismExecutionPayloadEnvelopeV3;

crates/rpc/rpc-engine-api/src/engine_api.rs

@@ -71,7 +71,7 @@ struct EngineApiInner<Provider, EngineT: EngineTypes, Pool> {
 impl<Provider, EngineT, Pool> EngineApi<Provider, EngineT, Pool>
 where
     Provider: HeaderProvider + BlockReader + StateProviderFactory + EvmEnvProvider + 'static,
-    EngineT: EngineTypes,
+    EngineT: EngineTypes<ChainSpec = ChainSpec>,
     Pool: TransactionPool + 'static,
 {
     /// Create new instance of [`EngineApi`].
@@ -622,7 +622,7 @@ where
 impl<Provider, EngineT, Pool> EngineApiServer<EngineT> for EngineApi<Provider, EngineT, Pool>
 where
     Provider: HeaderProvider + BlockReader + StateProviderFactory + EvmEnvProvider + 'static,
-    EngineT: EngineTypes,
+    EngineT: EngineTypes<ChainSpec = ChainSpec>,
     Pool: TransactionPool + 'static,
 {
     /// Handler for `engine_newPayloadV1`

examples/custom-engine-types/src/main.rs

@@ -167,6 +167,8 @@ impl PayloadTypes for CustomEngineTypes {
 }
 
 impl EngineTypes for CustomEngineTypes {
+    type ChainSpec = ChainSpec;
+
     type ExecutionPayloadV1 = ExecutionPayloadV1;
     type ExecutionPayloadV2 = ExecutionPayloadEnvelopeV2;
     type ExecutionPayloadV3 = ExecutionPayloadEnvelopeV3;