feat: reth-primitives-trait no-std support (#8869)

Co-authored-by: Matthias Seitz <matthias.seitz@outlook.de>

crates/primitives-traits/Cargo.toml

@@ -42,6 +42,8 @@ test-fuzz.workspace = true
 rand.workspace = true
 
 [features]
+default = ["std"]
+std = []
 test-utils = ["arbitrary"]
 arbitrary = [
     "dep:arbitrary",

crates/primitives-traits/src/constants.rs

@@ -1,7 +1,7 @@
 //! Ethereum protocol-related constants
 
 use alloy_primitives::{b256, B256, U256};
-use std::time::Duration;
+use core::time::Duration;
 
 /// The client version: `reth/v{major}.{minor}.{patch}`
 pub const RETH_CLIENT_VERSION: &str = concat!("reth/v", env!("CARGO_PKG_VERSION"));

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

@@ -15,9 +15,9 @@ use alloy_eips::{
 use alloy_primitives::{keccak256, Address, BlockNumber, Bloom, Bytes, B256, B64, U256};
 use alloy_rlp::{length_of_length, Decodable, Encodable};
 use bytes::BufMut;
+use core::mem;
 use reth_codecs::{main_codec, Compact};
 use revm_primitives::{calc_blob_gasprice, calc_excess_blob_gas};
-use std::mem;
 
 /// Block header
 #[main_codec]

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

@@ -5,11 +5,11 @@ use alloy_primitives::{keccak256, BlockHash};
 use alloy_primitives::{BlockNumber, B256, U256};
 use alloy_rlp::{Decodable, Encodable};
 use bytes::BufMut;
+use core::mem;
 use derive_more::{AsRef, Deref};
 #[cfg(any(test, feature = "arbitrary"))]
 use proptest::prelude::*;
 use reth_codecs::{add_arbitrary_tests, main_codec, Compact};
-use std::mem;
 
 /// A [`Header`] that is sealed at a precalculated hash, use [`SealedHeader::unseal()`] if you want
 /// to modify header.

crates/primitives-traits/src/lib.rs

@@ -9,6 +9,7 @@
 // TODO: remove when https://github.com/proptest-rs/proptest/pull/427 is merged
 #![allow(unknown_lints, non_local_definitions)]
 #![cfg_attr(docsrs, feature(doc_cfg, doc_auto_cfg))]
+#![cfg_attr(not(feature = "std"), no_std)]
 
 #[cfg(feature = "alloy-compat")]
 mod alloy_compat;