feat(fee): add gas cost for code bytes

crates/blockifier/src/fee/actual_cost.rs

@@ -163,6 +163,7 @@ impl<'a> ActualCostBuilder<'a> {
             self.calldata_length,
             self.signature_length,
             self.l1_payload_size,
+            self.class_info,
             use_kzg_da,
         )?;
 

crates/blockifier/src/fee/gas_usage.rs

@@ -11,6 +11,7 @@ use crate::transaction::objects::{
     GasVector, HasRelatedFeeType, ResourcesMapping, TransactionExecutionResult,
     TransactionPreValidationResult,
 };
+use crate::transaction::transactions::ClassInfo;
 use crate::utils::{u128_from_usize, usize_from_u128};
 use crate::versioned_constants::VersionedConstants;
 
@@ -22,13 +23,15 @@ pub mod test;
 /// the Verifier) following the addition of a transaction with the given parameters to a batch;
 /// e.g., a message from L2 to L1 is followed by a storage write operation in Starknet L1 contract
 /// which requires gas.
+#[allow(clippy::too_many_arguments)]
 pub fn calculate_tx_gas_usage_vector<'a>(
     versioned_constants: &VersionedConstants,
     call_infos: impl Iterator<Item = &'a CallInfo>,
     state_changes_count: StateChangesCount,
     calldata_length: usize,
     signature_length: usize,
     l1_handler_payload_size: Option<usize>,
+    class_info: Option<ClassInfo>,
     use_kzg_da: bool,
 ) -> TransactionExecutionResult<GasVector> {
     Ok(calculate_messages_gas_vector(call_infos, l1_handler_payload_size)?
@@ -37,7 +40,8 @@ pub fn calculate_tx_gas_usage_vector<'a>(
             calldata_length,
             signature_length,
             versioned_constants,
-        ))
+        )
+        + get_code_gas_cost(class_info, versioned_constants))
 }
 
 /// Returns an estimation of the gas usage for processing L1<>L2 messages on L1. Accounts for both
@@ -99,6 +103,28 @@ pub fn get_calldata_and_signature_gas_cost(
     GasVector { l1_gas: calldata_and_signature_gas_cost, l1_data_gas: 0 }
 }
 
+// Returns the gas cost of class information added to L2 via a Declare transaction. Each code felt
+// costs a fixed and configurable amount of gas. The cost is 0 for non-Declare transactions.
+pub fn get_code_gas_cost(
+    class_info: Option<ClassInfo>,
+    versioned_constants: &VersionedConstants,
+) -> GasVector {
+    if let Some(class_info) = class_info {
+        let l2_resource_gas_costs = versioned_constants.get_l2_resource_gas_costs();
+
+        let total_code_size = u128_from_usize(
+            (class_info.bytecode_length() + class_info.sierra_program_length)
+                * eth_gas_constants::WORD_WIDTH
+                + class_info.abi_length,
+        )
+        .expect("Failed to convert total code size from usize to u128.");
+        let code_gas_cost = total_code_size * l2_resource_gas_costs.milligas_per_code_byte / 1000;
+        GasVector { l1_gas: code_gas_cost, l1_data_gas: 0 }
+    } else {
+        GasVector { l1_gas: 0, l1_data_gas: 0 }
+    }
+}
+
 /// Returns the number of felts added to the output data availability segment as a result of adding
 /// a transaction to a batch. Note that constant cells - such as the one that holds the number of
 /// modified contracts - are not counted.

crates/blockifier/src/fee/gas_usage_test.rs

@@ -83,6 +83,7 @@ fn test_calculate_tx_gas_usage_basic(#[values(false, true)] use_kzg_da: bool) {
         0,
         0,
         None,
+        None,
         use_kzg_da,
     )
     .unwrap();
@@ -116,6 +117,7 @@ fn test_calculate_tx_gas_usage_basic(#[values(false, true)] use_kzg_da: bool) {
         calldata_length,
         signature_length,
         None,
+        None,
         use_kzg_da,
     )
     .unwrap();
@@ -131,6 +133,7 @@ fn test_calculate_tx_gas_usage_basic(#[values(false, true)] use_kzg_da: bool) {
         l1_handler_payload_size,
         signature_length,
         Some(l1_handler_payload_size),
+        None,
         use_kzg_da,
     )
     .unwrap();
@@ -205,6 +208,7 @@ fn test_calculate_tx_gas_usage_basic(#[values(false, true)] use_kzg_da: bool) {
         0,
         0,
         None,
+        None,
         use_kzg_da,
     )
     .unwrap();
@@ -246,6 +250,7 @@ fn test_calculate_tx_gas_usage_basic(#[values(false, true)] use_kzg_da: bool) {
         0,
         0,
         None,
+        None,
         use_kzg_da,
     )
     .unwrap();
@@ -270,6 +275,7 @@ fn test_calculate_tx_gas_usage_basic(#[values(false, true)] use_kzg_da: bool) {
         l1_handler_payload_size,
         signature_length,
         Some(l1_handler_payload_size),
+        None,
         use_kzg_da,
     )
     .unwrap();

crates/blockifier/src/transaction/transactions.rs

@@ -111,7 +111,7 @@ pub struct ClassInfo {
 }
 
 impl ClassInfo {
-    fn _bytecode_length(&self) -> usize {
+    pub fn bytecode_length(&self) -> usize {
         self.contract_class.bytecode_length()
     }
 }

crates/blockifier/src/transaction/transactions_test.rs

@@ -36,7 +36,7 @@ use crate::execution::execution_utils::{felt_to_stark_felt, stark_felt_to_felt};
 use crate::fee::fee_utils::calculate_tx_fee;
 use crate::fee::gas_usage::{
     calculate_tx_gas_usage_vector, estimate_minimal_gas_vector,
-    get_calldata_and_signature_gas_cost, get_da_gas_cost,
+    get_calldata_and_signature_gas_cost, get_code_gas_cost, get_da_gas_cost,
 };
 use crate::state::cached_state::{CachedState, StateChangesCount};
 use crate::state::errors::StateError;
@@ -1087,6 +1087,7 @@ fn test_declare_tx(
     #[values(false, true)] use_kzg_da: bool,
 ) {
     let block_context = &BlockContext::create_for_account_testing_with_kzg(use_kzg_da);
+    let versioned_constants = &block_context.versioned_constants;
     let empty_contract = FeatureContract::Empty(empty_contract_version);
     let account = FeatureContract::AccountWithoutValidations(account_cairo_version);
     let chain_info = &block_context.chain_info;
@@ -1137,6 +1138,8 @@ fn test_declare_tx(
     );
 
     let da_gas = declare_expected_gas_vector(tx_version, use_kzg_da);
+    let code_gas: GasVector = get_code_gas_cost(Some(class_info.clone()), versioned_constants);
+    let gas_usage = code_gas + da_gas.clone();
 
     let expected_execution_info = TransactionExecutionInfo {
         validate_call_info: expected_validate_call_info,
@@ -1146,8 +1149,8 @@ fn test_declare_tx(
         da_gas: da_gas.clone(),
         revert_error: None,
         actual_resources: ResourcesMapping(HashMap::from([
-            (abi_constants::L1_GAS_USAGE.to_string(), da_gas.l1_gas.try_into().unwrap()),
-            (abi_constants::BLOB_GAS_USAGE.to_string(), da_gas.l1_data_gas.try_into().unwrap()),
+            (abi_constants::L1_GAS_USAGE.to_string(), gas_usage.l1_gas.try_into().unwrap()),
+            (abi_constants::BLOB_GAS_USAGE.to_string(), gas_usage.l1_data_gas.try_into().unwrap()),
             (HASH_BUILTIN_NAME.to_string(), 16),
             (
                 RANGE_CHECK_BUILTIN_NAME.to_string(),
@@ -1514,6 +1517,7 @@ fn test_calculate_tx_gas_usage(#[values(false, true)] use_kzg_da: bool) {
         calldata_length,
         signature_length,
         None,
+        None,
         use_kzg_da,
     )
     .unwrap();
@@ -1568,6 +1572,7 @@ fn test_calculate_tx_gas_usage(#[values(false, true)] use_kzg_da: bool) {
         calldata_length,
         signature_length,
         None,
+        None,
         use_kzg_da,
     )
     .unwrap();