chore: make reth-ethereum-evm compile with no-std (#8935)

crates/ethereum/evm/Cargo.toml

@@ -33,3 +33,6 @@ reth-revm = { workspace = true, features = ["test-utils"] }
 secp256k1.workspace = true
 serde_json.workspace = true
 
+[features]
+default = ["std"]
+std = []

crates/ethereum/evm/src/eip6110.rs

@@ -6,6 +6,9 @@ use reth_evm::execute::BlockValidationError;
 use reth_primitives::{Receipt, Request};
 use revm_primitives::Log;
 
+#[cfg(not(feature = "std"))]
+use alloc::{string::ToString, vec::Vec};
+
 sol! {
     #[allow(missing_docs)]
     event DepositEvent(

crates/ethereum/evm/src/execute.rs

@@ -31,6 +31,11 @@ use revm_primitives::{
     db::{Database, DatabaseCommit},
     BlockEnv, CfgEnvWithHandlerCfg, EnvWithHandlerCfg, ResultAndState,
 };
+
+#[cfg(not(feature = "std"))]
+use alloc::{sync::Arc, vec, vec::Vec};
+
+#[cfg(feature = "std")]
 use std::sync::Arc;
 
 /// Provides executors to execute regular ethereum blocks

crates/ethereum/evm/src/lib.rs

@@ -7,6 +7,10 @@
 )]
 #![cfg_attr(not(test), warn(unused_crate_dependencies))]
 #![cfg_attr(docsrs, feature(doc_cfg, doc_auto_cfg))]
+#![cfg_attr(not(feature = "std"), no_std)]
+
+#[cfg(not(feature = "std"))]
+extern crate alloc;
 
 use reth_chainspec::ChainSpec;
 use reth_evm::{ConfigureEvm, ConfigureEvmEnv};