fix: serde for eth_simulateV1 (alloy-rs#1273)

* fix: serde for eth_simulateV1

* clippy + fmt

crates/provider/src/fillers/nonce.rs

@@ -46,6 +46,8 @@ impl NonceManager for SimpleNonceManager {
     }
 }
 
+/// Cached nonce manager
+///
 /// This [`NonceManager`] implementation will fetch the transaction count for any new account it
 /// sees, store it locally and increment the locally stored nonce as transactions are sent via
 /// [`Provider::send_transaction`].

crates/rpc-types-eth/src/simulate.rs

@@ -1,9 +1,9 @@
 //! 'eth_simulateV1' Request / Response types: <https://github.com/ethereum/execution-apis/pull/484>
 
-use alloy_primitives::{Address, Bytes, Log, B256};
+use alloy_primitives::Bytes;
 use serde::{Deserialize, Serialize};
 
-use crate::{state::StateOverride, BlockOverrides, TransactionRequest};
+use crate::{state::StateOverride, Block, BlockOverrides, Log, TransactionRequest};
 
 /// The maximum number of blocks that can be simulated in a single request,
 pub const MAX_SIMULATE_BLOCKS: u64 = 256;
@@ -15,47 +15,26 @@ pub const MAX_SIMULATE_BLOCKS: u64 = 256;
 #[serde(rename_all = "camelCase")]
 pub struct SimBlock {
     /// Modifications to the default block characteristics.
-    pub block_overrides: BlockOverrides,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub block_overrides: Option<BlockOverrides>,
     /// State modifications to apply before executing the transactions.
-    pub state_overrides: StateOverride,
+    #[serde(default, skip_serializing_if = "Option::is_none")]
+    pub state_overrides: Option<StateOverride>,
     /// A vector of transactions to be simulated.
     pub calls: Vec<TransactionRequest>,
 }
+
 /// Represents the result of simulating a block.
 #[derive(Clone, Debug, Serialize, Deserialize)]
 #[serde(rename_all = "camelCase")]
-pub struct SimulatedBlock {
-    /// The number of the block.
-    #[serde(with = "alloy_serde::quantity")]
-    pub number: u64,
-    /// The hash of the block.
-    pub hash: B256,
-    /// The timestamp of the block.
-    #[serde(with = "alloy_serde::quantity")]
-    pub timestamp: u64,
-    /// The gas limit of the block.
-    #[serde(with = "alloy_serde::quantity")]
-    pub gas_limit: u64,
-    /// The amount of gas used in the block.
-    #[serde(with = "alloy_serde::quantity")]
-    pub gas_used: u64,
-    /// The recipient of the block's fees.
-    pub fee_recipient: Address,
-    /// The base fee per gas unit for the block.
-    #[serde(with = "alloy_serde::quantity")]
-    pub base_fee_per_gas: u64,
-    /// The previous RANDAO value of the block.
-    pub prev_randao: B256,
+pub struct SimulatedBlock<B = Block> {
+    /// The simulated block.
+    #[serde(flatten)]
+    pub inner: B,
     /// A vector of results for each call in the block.
     pub calls: Vec<SimCallResult>,
 }
-/// The response type for the eth_simulateV1 method.
-#[derive(Clone, Debug, Serialize, Deserialize)]
-#[serde(rename_all = "camelCase")]
-pub struct SimulateV1Response {
-    /// Simulated blocks vector.
-    pub simulated_blocks: Vec<SimulatedBlock>,
-}
+
 /// Captures the outcome of a transaction simulation.
 /// It includes the return value, logs produced, gas used, and the status of the transaction.
 #[derive(Clone, Debug, Serialize, Deserialize)]
@@ -71,7 +50,7 @@ pub struct SimCallResult {
     pub gas_used: u64,
     /// The final status of the transaction, typically indicating success or failure.
     #[serde(with = "alloy_serde::quantity")]
-    pub status: u64,
+    pub status: bool,
     /// Error in case the call failed
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub error: Option<SimulateError>,
@@ -168,11 +147,21 @@ mod tests {
         assert_eq!(sim_opts.block_state_calls.len(), 2);
 
         let block_state_call_1 = &sim_opts.block_state_calls[0];
-        assert!(block_state_call_1.state_overrides.contains_key(&address_1));
-        assert_eq!(block_state_call_1.state_overrides.get(&address_1).unwrap().nonce.unwrap(), 5);
+        assert!(block_state_call_1.state_overrides.as_ref().unwrap().contains_key(&address_1));
+        assert_eq!(
+            block_state_call_1
+                .state_overrides
+                .as_ref()
+                .unwrap()
+                .get(&address_1)
+                .unwrap()
+                .nonce
+                .unwrap(),
+            5
+        );
 
         let block_state_call_2 = &sim_opts.block_state_calls[1];
-        assert!(block_state_call_2.state_overrides.contains_key(&address_1));
+        assert!(block_state_call_2.state_overrides.as_ref().unwrap().contains_key(&address_1));
 
         assert_eq!(block_state_call_2.calls.len(), 2);
         assert_eq!(block_state_call_2.calls[0].from.unwrap(), address_1);

crates/rpc-types-eth/src/state.rs

@@ -29,6 +29,11 @@ pub struct AccountOverride {
     /// the call.
     #[serde(default, skip_serializing_if = "Option::is_none")]
     pub state_diff: Option<HashMap<B256, B256>>,
+    /// Moves addresses precompile into the specified address. This move is done before the 'code'
+    /// override is set. When the specified address is not a precompile, the behaviour is undefined
+    /// and different clients might behave differently.
+    #[serde(default, skip_serializing_if = "Option::is_none", rename = "movePrecompileToAddress")]
+    pub move_precompile_to: Option<Address>,
 }
 
 /// Helper type that bundles various overrides for EVM Execution.