anvil: Correctly set HF fields for Genesis block (#9248)

Some fields were missing for some HF, leading to an invalid Genesis
block hash.

crates/anvil/src/eth/backend/mem/mod.rs

@@ -230,8 +230,10 @@ impl Backend {
             trace!(target: "backend", "using forked blockchain at {}", fork.block_number());
             Blockchain::forked(fork.block_number(), fork.block_hash(), fork.total_difficulty())
         } else {
+            let env = env.read();
             Blockchain::new(
-                &env.read(),
+                &env,
+                env.handler_cfg.spec_id,
                 fees.is_eip1559().then(|| fees.base_fee()),
                 genesis.timestamp,
             )

crates/anvil/src/eth/backend/mem/storage.rs

@@ -10,6 +10,8 @@ use crate::eth::{
     error::BlockchainError,
     pool::transactions::PoolTransaction,
 };
+use alloy_consensus::constants::EMPTY_WITHDRAWALS;
+use alloy_eips::eip7685::EMPTY_REQUESTS_HASH;
 use alloy_primitives::{
     map::{B256HashMap, HashMap},
     Bytes, B256, U256, U64,
@@ -38,6 +40,7 @@ use foundry_evm::{
     },
 };
 use parking_lot::RwLock;
+use revm::primitives::SpecId;
 use std::{collections::VecDeque, fmt, sync::Arc, time::Duration};
 // use yansi::Paint;
 
@@ -262,7 +265,11 @@ pub struct BlockchainStorage {
 
 impl BlockchainStorage {
     /// Creates a new storage with a genesis block
-    pub fn new(env: &Env, base_fee: Option<u64>, timestamp: u64) -> Self {
+    pub fn new(env: &Env, spec_id: SpecId, base_fee: Option<u64>, timestamp: u64) -> Self {
+        let is_shanghai = spec_id >= SpecId::SHANGHAI;
+        let is_cancun = spec_id >= SpecId::CANCUN;
+        let is_prague = spec_id >= SpecId::PRAGUE;
+
         // create a dummy genesis block
         let partial_header = PartialHeader {
             timestamp,
@@ -272,6 +279,10 @@ impl BlockchainStorage {
             difficulty: env.block.difficulty,
             blob_gas_used: env.block.blob_excess_gas_and_price.as_ref().map(|_| 0),
             excess_blob_gas: env.block.get_blob_excess_gas(),
+
+            parent_beacon_block_root: is_cancun.then_some(Default::default()),
+            withdrawals_root: is_shanghai.then_some(EMPTY_WITHDRAWALS),
+            requests_hash: is_prague.then_some(EMPTY_REQUESTS_HASH),
             ..Default::default()
         };
         let block = Block::new::<MaybeImpersonatedTransaction>(partial_header, vec![]);
@@ -423,8 +434,12 @@ pub struct Blockchain {
 
 impl Blockchain {
     /// Creates a new storage with a genesis block
-    pub fn new(env: &Env, base_fee: Option<u64>, timestamp: u64) -> Self {
-        Self { storage: Arc::new(RwLock::new(BlockchainStorage::new(env, base_fee, timestamp))) }
+    pub fn new(env: &Env, spec_id: SpecId, base_fee: Option<u64>, timestamp: u64) -> Self {
+        Self {
+            storage: Arc::new(RwLock::new(BlockchainStorage::new(
+                env, spec_id, base_fee, timestamp,
+            ))),
+        }
     }
 
     pub fn forked(block_number: u64, block_hash: B256, total_difficulty: U256) -> Self {