fix: use shanghai config instead of london (#773)

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## Description

Engine is configured with Shanghai hardfork now. No other changes.

## Performance / NEAR gas cost considerations
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---------

Co-authored-by: Oleksandr Anyshchenko <oleksandr.anyshchenko@aurora.dev>

engine-tests/src/tests/erc20.rs

@@ -59,7 +59,7 @@ fn erc20_mint_out_of_gas() {
 
     // not enough gas to cover intrinsic cost
     let intrinsic_gas = test_utils::erc20::legacy_into_normalized_tx(mint_tx.clone())
-        .intrinsic_gas(&evm::Config::istanbul())
+        .intrinsic_gas(&evm::Config::shanghai())
         .unwrap();
     mint_tx.gas_limit = (intrinsic_gas - 1).into();
     let error = runner
@@ -214,7 +214,7 @@ fn deploy_erc_20_out_of_gas() {
 
     // not enough gas to cover intrinsic cost
     let intrinsic_gas = test_utils::erc20::legacy_into_normalized_tx(deploy_transaction.clone())
-        .intrinsic_gas(&evm::Config::istanbul())
+        .intrinsic_gas(&evm::Config::shanghai())
         .unwrap();
     deploy_transaction.gas_limit = (intrinsic_gas - 1).into();
     let error = runner

engine-transactions/src/lib.rs

@@ -137,7 +137,7 @@ impl NormalizedEthTransaction {
         let is_contract_creation = self.to.is_none();
 
         let base_gas = if is_contract_creation {
-            config.gas_transaction_create
+            config.gas_transaction_create + init_code_cost(config, &self.data)?
         } else {
             config.gas_transaction_call
         };
@@ -185,6 +185,19 @@ impl NormalizedEthTransaction {
     }
 }
 
+fn init_code_cost(config: &evm::Config, data: &[u8]) -> Result<u64, Error> {
+    // As per EIP-3860:
+    // > We define initcode_cost(initcode) to equal INITCODE_WORD_COST * ceil(len(initcode) / 32).
+    // where INITCODE_WORD_COST is 2.
+    let init_code_cost = if config.max_initcode_size.is_some() {
+        2 * ((u64::try_from(data.len()).map_err(|_| Error::IntegerConversion)? + 31) / 32)
+    } else {
+        0
+    };
+
+    Ok(init_code_cost)
+}
+
 #[derive(Debug, Clone, Eq, PartialEq)]
 #[cfg_attr(feature = "serde", derive(serde::Serialize))]
 pub enum Error {

engine/src/engine.rs

@@ -386,7 +386,7 @@ pub struct Engine<'env, I: IO, E: Env, M = AuroraModExp> {
     modexp_algorithm: PhantomData<M>,
 }
 
-pub(crate) const CONFIG: &Config = &Config::london();
+pub(crate) const CONFIG: &Config = &Config::shanghai();
 
 impl<'env, I: IO + Copy, E: Env, M: ModExpAlgorithm> Engine<'env, I, E, M> {
     pub fn new(