store prev header in exec fixture

Author: clabby

bin/opt8n/src/cli/t8n.rs

@@ -103,7 +103,7 @@ impl<'a> T8n<'a> {
                         .collect::<Vec<_>>();
 
                     // Execute the test block to create the fixture.
-                    let fixture = stf.execute(self.state_cfg.header.clone(), transactions)?;
+                    let fixture = stf.execute(self.state_cfg.pre_header.clone(), self.state_cfg.header.clone(), transactions)?;
 
                     // Write the fixture to disk.
                     let out_path = self

bin/opt8n/src/generator/mod.rs

@@ -108,6 +108,7 @@ impl StateTransition {
 
     pub(crate) fn execute(
         &mut self,
+        prev_header: Header,
         header: Header,
         encoded_txs: Vec<Bytes>,
     ) -> Result<ExecutionFixture> {
@@ -213,7 +214,7 @@ impl StateTransition {
                 current_coinbase: header.beneficiary,
                 current_difficulty: header.mix_hash.into(),
                 current_gas_limit: U256::from(header.gas_limit),
-                previous_hash: header.parent_hash,
+                previous_header: prev_header,
                 current_number: U256::from(header.number),
                 current_timestamp: U256::from(header.timestamp),
                 parent_beacon_block_root: header.parent_beacon_block_root,

crates/op-test-vectors/src/execution.rs

@@ -1,5 +1,6 @@
 //! Module containing the execution test fixture.
 
+use alloy_consensus::Header;
 use alloy_genesis::GenesisAccount;
 use alloy_primitives::{Address, Bloom, Bytes, B256, U256};
 use serde::{Deserialize, Serialize};
@@ -33,8 +34,8 @@ pub struct ExecutionEnvironment {
     pub current_difficulty: U256,
     /// The current block gas limit.
     pub current_gas_limit: U256,
-    /// The previous block hash.
-    pub previous_hash: B256,
+    /// The previous block header.
+    pub previous_header: Header,
     /// The current block number.
     pub current_number: U256,
     /// The current block timestamp.