feat(no_std): Add no_std support for reth-payload-primitives (#13922)

crates/payload/primitives/Cargo.toml

@@ -35,4 +35,16 @@ tokio = { workspace = true, default-features = false, features = ["sync"] }
 assert_matches.workspace = true
 
 [features]
+default = ["std"]
+std = [
+    "reth-chainspec/std",
+    "reth-primitives/std",
+    "revm-primitives/std",
+    "alloy-eips/std",
+    "alloy-primitives/std",
+    "alloy-rpc-types-engine/std",
+    "op-alloy-rpc-types-engine?/std",
+    "serde/std",
+    "thiserror/std",
+]
 op = ["dep:op-alloy-rpc-types-engine"]

crates/payload/primitives/src/error.rs

@@ -1,5 +1,6 @@
 //! Error types emitted by types or implementations of this crate.
 
+use alloc::boxed::Box;
 use alloy_primitives::B256;
 use alloy_rpc_types_engine::ForkchoiceUpdateError;
 use reth_errors::{ProviderError, RethError};

crates/payload/primitives/src/lib.rs

@@ -7,7 +7,11 @@
 )]
 #![cfg_attr(not(test), warn(unused_crate_dependencies))]
 #![cfg_attr(docsrs, feature(doc_cfg, doc_auto_cfg))]
+#![cfg_attr(not(feature = "std"), no_std)]
 
+extern crate alloc;
+
+use crate::alloc::string::ToString;
 use alloy_primitives::Bytes;
 use reth_chainspec::EthereumHardforks;
 

crates/payload/primitives/src/payload.rs

@@ -1,4 +1,5 @@
 use crate::{MessageValidationKind, PayloadAttributes};
+use alloc::vec::Vec;
 use alloy_eips::eip4895::Withdrawal;
 use alloy_primitives::B256;
 use alloy_rpc_types_engine::ExecutionPayload;

crates/payload/primitives/src/traits.rs

@@ -1,15 +1,17 @@
+use alloc::vec::Vec;
 use alloy_eips::{
     eip4895::{Withdrawal, Withdrawals},
     eip7685::Requests,
 };
 use alloy_primitives::{Address, B256, U256};
 use alloy_rpc_types_engine::{PayloadAttributes as EthPayloadAttributes, PayloadId};
+use core::fmt;
 use reth_chain_state::ExecutedBlock;
 use reth_primitives::{NodePrimitives, SealedBlock};
 
 /// Represents a built payload type that contains a built `SealedBlock` and can be converted into
 /// engine API execution payloads.
-pub trait BuiltPayload: Send + Sync + std::fmt::Debug {
+pub trait BuiltPayload: Send + Sync + fmt::Debug {
     /// The node's primitive types
     type Primitives: NodePrimitives;
 
@@ -32,7 +34,7 @@ pub trait BuiltPayload: Send + Sync + std::fmt::Debug {
 ///
 /// This is used as a conversion type, transforming a payload attributes type that the engine API
 /// receives, into a type that the payload builder can use.
-pub trait PayloadBuilderAttributes: Send + Sync + std::fmt::Debug {
+pub trait PayloadBuilderAttributes: Send + Sync + fmt::Debug {
     /// The payload attributes that can be used to construct this type. Used as the argument in
     /// [`PayloadBuilderAttributes::try_new`].
     type RpcPayloadAttributes;
@@ -77,7 +79,7 @@ pub trait PayloadBuilderAttributes: Send + Sync + std::fmt::Debug {
 ///
 /// This type is emitted as part of the forkchoiceUpdated call
 pub trait PayloadAttributes:
-    serde::de::DeserializeOwned + serde::Serialize + std::fmt::Debug + Clone + Send + Sync + 'static
+    serde::de::DeserializeOwned + serde::Serialize + fmt::Debug + Clone + Send + Sync + 'static
 {
     /// Returns the timestamp to be used in the payload job.
     fn timestamp(&self) -> u64;