feat(consensus): bincode compatibility for EIP-7702 (#1404)

Cargo.toml

@@ -81,7 +81,7 @@ alloy-chains = { version = "0.1.18", default-features = false }
 
 # eips
 alloy-eip2930 = { version = "0.1.0", default-features = false }
-alloy-eip7702 = { version = "0.1.0", default-features = false }
+alloy-eip7702 = { version = "0.1", default-features = false }
 
 # ethereum
 ethereum_ssz_derive = "0.8"

crates/consensus/Cargo.toml

@@ -67,4 +67,4 @@ serde = [
     "dep:alloy-serde",
     "alloy-eips/serde",
 ]
-serde-bincode-compat = ["serde_with"]
+serde-bincode-compat = ["alloy-eips/serde-bincode-compat", "serde_with"]

crates/consensus/src/transaction/eip1559.rs

@@ -450,7 +450,7 @@ mod tests {
     }
 }
 
-/// serde-bincode-compatible [`TxEip1559`] serde implementation.
+/// Bincode-compatible [`TxEip1559`] serde implementation.
 #[cfg(all(feature = "serde", feature = "serde-bincode-compat"))]
 pub(super) mod serde_bincode_compat {
     use alloc::borrow::Cow;

crates/consensus/src/transaction/eip7702.rs

@@ -478,3 +478,125 @@ mod tests {
         assert_eq!(decoded, tx.into_signed(sig));
     }
 }
+
+/// Bincode-compatible [`TxEip7702`] serde implementation.
+#[cfg(all(feature = "serde", feature = "serde-bincode-compat"))]
+pub(super) mod serde_bincode_compat {
+    use alloc::borrow::Cow;
+    use alloy_eips::{eip2930::AccessList, eip7702::serde_bincode_compat::SignedAuthorization};
+    use alloy_primitives::{Address, Bytes, ChainId, U256};
+    use serde::{Deserialize, Deserializer, Serialize, Serializer};
+    use serde_with::{DeserializeAs, SerializeAs};
+
+    /// Bincode-compatible [`super::TxEip7702`] serde implementation.
+    ///
+    /// Intended to use with the [`serde_with::serde_as`] macro in the following way:
+    /// ```rust
+    /// use alloy_consensus::{serde_bincode_compat, TxEip7702};
+    /// use serde::{Deserialize, Serialize};
+    /// use serde_with::serde_as;
+    ///
+    /// #[serde_as]
+    /// #[derive(Serialize, Deserialize)]
+    /// struct Data {
+    ///     #[serde_as(as = "serde_bincode_compat::transaction::TxEip7702")]
+    ///     transaction: TxEip7702,
+    /// }
+    /// ```
+    #[derive(Debug, Serialize, Deserialize)]
+    pub struct TxEip7702<'a> {
+        chain_id: ChainId,
+        nonce: u64,
+        gas_limit: u64,
+        max_fee_per_gas: u128,
+        max_priority_fee_per_gas: u128,
+        to: Address,
+        value: U256,
+        access_list: Cow<'a, AccessList>,
+        authorization_list: Vec<SignedAuthorization<'a>>,
+        input: Cow<'a, Bytes>,
+    }
+
+    impl<'a> From<&'a super::TxEip7702> for TxEip7702<'a> {
+        fn from(value: &'a super::TxEip7702) -> Self {
+            Self {
+                chain_id: value.chain_id,
+                nonce: value.nonce,
+                gas_limit: value.gas_limit,
+                max_fee_per_gas: value.max_fee_per_gas,
+                max_priority_fee_per_gas: value.max_priority_fee_per_gas,
+                to: value.to,
+                value: value.value,
+                access_list: Cow::Borrowed(&value.access_list),
+                authorization_list: value.authorization_list.iter().map(Into::into).collect(),
+                input: Cow::Borrowed(&value.input),
+            }
+        }
+    }
+
+    impl<'a> From<TxEip7702<'a>> for super::TxEip7702 {
+        fn from(value: TxEip7702<'a>) -> Self {
+            Self {
+                chain_id: value.chain_id,
+                nonce: value.nonce,
+                gas_limit: value.gas_limit,
+                max_fee_per_gas: value.max_fee_per_gas,
+                max_priority_fee_per_gas: value.max_priority_fee_per_gas,
+                to: value.to,
+                value: value.value,
+                access_list: value.access_list.into_owned(),
+                authorization_list: value.authorization_list.into_iter().map(Into::into).collect(),
+                input: value.input.into_owned(),
+            }
+        }
+    }
+
+    impl<'a> SerializeAs<super::TxEip7702> for TxEip7702<'a> {
+        fn serialize_as<S>(source: &super::TxEip7702, serializer: S) -> Result<S::Ok, S::Error>
+        where
+            S: Serializer,
+        {
+            TxEip7702::from(source).serialize(serializer)
+        }
+    }
+
+    impl<'de> DeserializeAs<'de, super::TxEip7702> for TxEip7702<'de> {
+        fn deserialize_as<D>(deserializer: D) -> Result<super::TxEip7702, D::Error>
+        where
+            D: Deserializer<'de>,
+        {
+            TxEip7702::deserialize(deserializer).map(Into::into)
+        }
+    }
+
+    #[cfg(test)]
+    mod tests {
+        use arbitrary::Arbitrary;
+        use rand::Rng;
+        use serde::{Deserialize, Serialize};
+        use serde_with::serde_as;
+
+        use super::super::{serde_bincode_compat, TxEip7702};
+
+        #[test]
+        fn test_tx_eip7702_bincode_roundtrip() {
+            #[serde_as]
+            #[derive(Debug, PartialEq, Eq, Serialize, Deserialize)]
+            struct Data {
+                #[serde_as(as = "serde_bincode_compat::TxEip7702")]
+                transaction: TxEip7702,
+            }
+
+            let mut bytes = [0u8; 1024];
+            rand::thread_rng().fill(bytes.as_mut_slice());
+            let data = Data {
+                transaction: TxEip7702::arbitrary(&mut arbitrary::Unstructured::new(&bytes))
+                    .unwrap(),
+            };
+
+            let encoded = bincode::serialize(&data).unwrap();
+            let decoded: Data = bincode::deserialize(&encoded).unwrap();
+            assert_eq!(decoded, data);
+        }
+    }
+}

crates/consensus/src/transaction/mod.rs

@@ -40,7 +40,7 @@ pub use typed::TypedTransaction;
 pub mod serde_bincode_compat {
     pub use super::{
         eip1559::serde_bincode_compat::*, eip2930::serde_bincode_compat::*,
-        legacy::serde_bincode_compat::*,
+        eip7702::serde_bincode_compat::*, legacy::serde_bincode_compat::*,
     };
 }
 

crates/eips/Cargo.toml

@@ -63,6 +63,7 @@ std = ["alloy-primitives/std", "alloy-rlp/std", "derive_more?/std",
 "serde?/std", "c-kzg?/std", "once_cell?/std"]
 serde = ["dep:alloy-serde", "dep:serde", "alloy-primitives/serde", 
 "c-kzg?/serde", "alloy-eip2930/serde", "alloy-eip7702/serde"]
+serde-bincode-compat = ["alloy-eip7702/serde-bincode-compat"]
 kzg = ["kzg-sidecar", "sha2", "dep:derive_more", "dep:c-kzg", "dep:once_cell"]
 kzg-sidecar = ["sha2"]
 k256 = ["alloy-eip7702/k256"]