chore: replace ExitV1 with WithdrawalRequest (alloy-rs#672)

* chore: replace `ExitV1` with `WithdrawalRequest`

EIP-7002 has been changed to work with EIP-7685,
so the exit type no longer exists and is instead a
`WithdrawalRequest` object.

In the engine API spec this is called `WithdrawalRequestV1`,
which is why it is re-exported as such from `alloy-eips`

* fix: cfg attr for serde

* chore: correct field name

* chore: cfg attr _-_

* chore: delete `exit` module (unused)

crates/eips/src/eip7002.rs

@@ -0,0 +1,25 @@
+//! Contains WithdrawalRequest types, first introduced in the [Prague hardfork](https://github.com/ethereum/execution-apis/blob/main/src/engine/prague.md).
+//!
+//! See also [EIP-7002](https://eips.ethereum.org/EIPS/eip-7002): Execution layer triggerable withdrawals
+
+use alloy_primitives::{Address, FixedBytes};
+
+/// Represents an execution layer triggerable withdrawal request.
+///
+/// See [EIP-7002](https://eips.ethereum.org/EIPS/eip-7002).
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
+#[cfg_attr(feature = "serde", derive(serde::Serialize, serde::Deserialize))]
+#[cfg_attr(feature = "serde", serde(rename_all = "camelCase"))]
+#[cfg_attr(
+    any(test, feature = "arbitrary"),
+    derive(proptest_derive::Arbitrary, arbitrary::Arbitrary)
+)]
+pub struct WithdrawalRequest {
+    /// Address of the source of the exit.
+    pub source_address: Address,
+    /// Validator public key.
+    pub validator_public_key: FixedBytes<48>,
+    /// Amount of withdrawn ether in gwei.
+    #[cfg_attr(feature = "serde", serde(with = "alloy_serde::u64_via_ruint"))]
+    pub amount: u64,
+}

crates/eips/src/lib.rs

@@ -33,10 +33,12 @@ pub mod eip2930;
 
 pub mod eip4788;
 
+pub mod eip4895;
+
 pub mod eip4844;
 pub use eip4844::{calc_blob_gasprice, calc_excess_blob_gas};
 
 pub mod eip6110;
 pub mod merge;
 
-pub mod eip4895;
+pub mod eip7002;

crates/rpc-types-engine/src/lib.rs

@@ -21,7 +21,6 @@
 #![cfg_attr(docsrs, feature(doc_cfg, doc_auto_cfg))]
 
 mod cancun;
-mod exit;
 mod forkchoice;
 mod identification;
 mod jwt;
@@ -30,13 +29,15 @@ pub mod payload;
 mod transition;
 
 pub use self::{
-    cancun::*, exit::*, forkchoice::*, identification::*, jwt::*, optimism::*, payload::*,
-    transition::*,
+    cancun::*, forkchoice::*, identification::*, jwt::*, optimism::*, payload::*, transition::*,
 };
 
 #[doc(inline)]
 pub use alloy_eips::eip6110::DepositReceipt;
 
+#[doc(inline)]
+pub use alloy_eips::eip7002::WithdrawalRequest as WithdrawalRequestV1;
+
 /// The list of all supported Engine capabilities available over the engine endpoint.
 pub const CAPABILITIES: [&str; 12] = [
     "engine_forkchoiceUpdatedV1",

crates/rpc-types-engine/src/payload.rs

@@ -1,7 +1,6 @@
 //! Payload types.
-use crate::ExitV1;
 use alloy_consensus::{Blob, Bytes48};
-use alloy_eips::eip6110::DepositReceipt;
+use alloy_eips::{eip6110::DepositReceipt, eip7002::WithdrawalRequest};
 use alloy_primitives::{Address, Bloom, Bytes, B256, B64, U256};
 use alloy_rpc_types::{transaction::BlobTransactionSidecar, Withdrawal};
 use serde::{ser::SerializeMap, Deserialize, Deserializer, Serialize, Serializer};
@@ -417,8 +416,10 @@ pub struct ExecutionPayloadV4 {
     ///
     /// This maps directly to the Deposits defined in [EIP-6110](https://eips.ethereum.org/EIPS/eip-6110).
     pub deposit_receipts: Vec<DepositReceipt>,
-    /// Array of exits
-    pub exits: Vec<ExitV1>,
+    /// Array of execution layer triggerable withdrawal requests.
+    ///
+    /// See [EIP-7002](https://eips.ethereum.org/EIPS/eip-7002).
+    pub withdrawal_requests: Vec<WithdrawalRequest>,
 }
 
 impl ExecutionPayloadV4 {