chore: add helper trait for BlockReader tied to NetworkPrimitives (#13449)

crates/node/builder/src/builder/mod.rs

@@ -7,7 +7,7 @@ use crate::{
     components::NodeComponentsBuilder,
     node::FullNode,
     rpc::{RethRpcAddOns, RethRpcServerHandles, RpcContext},
-    DefaultNodeLauncher, LaunchNode, Node, NodeHandle,
+    BlockReaderFor, DefaultNodeLauncher, LaunchNode, Node, NodeHandle,
 };
 use alloy_eips::eip4844::env_settings::EnvKzgSettings;
 use futures::Future;
@@ -35,7 +35,7 @@ use reth_node_core::{
 };
 use reth_provider::{
     providers::{BlockchainProvider, NodeTypesForProvider},
-    BlockReader, ChainSpecProvider, FullProvider,
+    ChainSpecProvider, FullProvider,
 };
 use reth_tasks::TaskExecutor;
 use reth_transaction_pool::{PoolConfig, PoolTransaction, TransactionPool};
@@ -658,8 +658,7 @@ impl<Node: FullNodeTypes> BuilderContext<Node> {
                 >,
             > + Unpin
             + 'static,
-        Node::Provider:
-            BlockReader<Receipt = N::Receipt, Block = N::Block, Header = N::BlockHeader>,
+        Node::Provider: BlockReaderFor<N>,
     {
         self.start_network_with(builder, pool, Default::default())
     }
@@ -685,8 +684,7 @@ impl<Node: FullNodeTypes> BuilderContext<Node> {
                 >,
             > + Unpin
             + 'static,
-        Node::Provider:
-            BlockReader<Receipt = N::Receipt, Block = N::Block, Header = N::BlockHeader>,
+        Node::Provider: BlockReaderFor<N>,
     {
         let (handle, network, txpool, eth) = builder
             .transactions(pool, tx_config)

crates/node/builder/src/node.rs

@@ -7,13 +7,14 @@ use std::{
     sync::Arc,
 };
 
-use reth_node_api::{EngineTypes, FullNodeComponents};
+use reth_network::NetworkPrimitives;
+use reth_node_api::{BlockBody, EngineTypes, FullNodeComponents};
 use reth_node_core::{
     dirs::{ChainPath, DataDirPath},
     node_config::NodeConfig,
 };
 use reth_payload_builder::PayloadBuilderHandle;
-use reth_provider::ChainSpecProvider;
+use reth_provider::{BlockReader, ChainSpecProvider};
 use reth_rpc_api::EngineApiClient;
 use reth_rpc_builder::{auth::AuthServerHandle, RpcServerHandle};
 use reth_tasks::TaskExecutor;
@@ -210,3 +211,27 @@ impl<Node: FullNodeComponents, AddOns: NodeAddOns<Node>> DerefMut for FullNode<N
         &mut self.add_ons_handle
     }
 }
+
+/// This is a type alias to make type bounds simpler, when we have a [`NetworkPrimitives`] and need
+/// a [`BlockReader`] whose associated types match the [`NetworkPrimitives`] associated types.
+pub trait BlockReaderFor<N: NetworkPrimitives>:
+    BlockReader<
+    Block = N::Block,
+    Header = N::BlockHeader,
+    Transaction = <N::BlockBody as BlockBody>::Transaction,
+    Receipt = N::Receipt,
+>
+{
+}
+
+impl<N, T> BlockReaderFor<N> for T
+where
+    N: NetworkPrimitives,
+    T: BlockReader<
+        Block = N::Block,
+        Header = N::BlockHeader,
+        Transaction = <N::BlockBody as BlockBody>::Transaction,
+        Receipt = N::Receipt,
+    >,
+{
+}