feat(blockifier): add impl for GasCosts in versioned_constants

crates/blockifier/src/versioned_constants.rs

@@ -566,6 +566,57 @@ pub struct GasCosts {
     pub sha256_process_block_gas_cost: u64,
 }
 
+impl GasCosts {
+    pub fn get_builtin_gas_cost(&self, builtin: &BuiltinName) -> Result<u64, GasCostsError> {
+        const KECCAK_BUILTIN_GAS_COST : u64 = 136189;
+        match *builtin {
+            BuiltinName::range_check => Ok(self.range_check_gas_cost),
+            BuiltinName::pedersen => Ok(self.pedersen_gas_cost),
+            BuiltinName::bitwise => Ok(self.bitwise_builtin_gas_cost),
+            BuiltinName::ec_op => Ok(self.ecop_gas_cost),
+            //TODO (Yonatan): once keccak_builtin_gas_cost is being inserted to the versioned constants, replace the constant with field's value 
+            BuiltinName::keccak => Ok(KECCAK_BUILTIN_GAS_COST), 
+            BuiltinName::poseidon => Ok(self.poseidon_gas_cost),
+            BuiltinName::range_check96 => Ok(self.range_check_gas_cost),
+            BuiltinName::add_mod => Ok(self.add_mod_gas_cost),
+            BuiltinName::mul_mod => Ok(self.mul_mod_gas_cost),
+            BuiltinName::segment_arena => Err(GasCostsError::VirtualBuiltin),
+            // The following are unsupported builtins in Cairo 1
+             BuiltinName::output | BuiltinName::ecdsa => Err(GasCostsError::UnsupportedBuiltinInCairo1 {builtin: *builtin,}),
+        }
+    }
+
+    pub fn get_syscall_gas_cost(&self, selector: &SyscallSelector) -> Result<u64, GasCostsError> {
+        match selector {
+            SyscallSelector::CallContract => Ok(self.call_contract_gas_cost),
+            SyscallSelector::Deploy => Ok(self.deploy_gas_cost),
+            SyscallSelector::EmitEvent => Ok(self.emit_event_gas_cost),
+            SyscallSelector::GetBlockHash => Ok(self.get_block_hash_gas_cost),
+            SyscallSelector::GetExecutionInfo => Ok(self.get_execution_info_gas_cost),
+            SyscallSelector::GetClassHashAt => Ok(self.get_class_hash_at_gas_cost),
+            SyscallSelector::Keccak => Ok(self.keccak_gas_cost),
+            SyscallSelector::Sha256ProcessBlock => Ok(self.sha256_process_block_gas_cost),
+            SyscallSelector::LibraryCall => Ok(self.library_call_gas_cost),
+            SyscallSelector::ReplaceClass => Ok(self.replace_class_gas_cost),
+            SyscallSelector::Secp256k1Add => Ok(self.secp256k1_add_gas_cost),
+            SyscallSelector::Secp256k1GetPointFromX => Ok(self.secp256k1_get_point_from_x_gas_cost),
+            SyscallSelector::Secp256k1GetXy => Ok(self.secp256k1_get_xy_gas_cost),
+            SyscallSelector::Secp256k1Mul => Ok(self.secp256k1_mul_gas_cost),
+            SyscallSelector::Secp256k1New => Ok(self.secp256k1_new_gas_cost),
+            SyscallSelector::Secp256r1Add => Ok(self.secp256r1_add_gas_cost),
+            SyscallSelector::Secp256r1GetPointFromX => Ok(self.secp256r1_get_point_from_x_gas_cost),
+            SyscallSelector::Secp256r1GetXy => Ok(self.secp256r1_get_xy_gas_cost),
+            SyscallSelector::Secp256r1Mul => Ok(self.secp256r1_mul_gas_cost),
+            SyscallSelector::Secp256r1New => Ok(self.secp256r1_new_gas_cost),
+            SyscallSelector::SendMessageToL1 => Ok(self.send_message_to_l1_gas_cost),
+            SyscallSelector::StorageRead => Ok(self.storage_read_gas_cost),
+            SyscallSelector::StorageWrite => Ok(self.storage_write_gas_cost),
+            // The following are unsupported syscalls in Cairo 1
+            SyscallSelector::DelegateCall | SyscallSelector::DelegateL1Handler | SyscallSelector::GetBlockNumber | SyscallSelector::GetBlockTimestamp | SyscallSelector::GetCallerAddress | SyscallSelector::GetContractAddress | SyscallSelector::GetTxInfo | SyscallSelector::GetSequencerAddress | SyscallSelector::GetTxSignature | SyscallSelector::LibraryCallL1Handler => Err(GasCostsError::DeprecatedSyscall{selector: *selector,}),
+        }
+    }
+}
+
 // Below, serde first deserializes the json into a regular IndexMap wrapped by the newtype
 // `OsConstantsRawJson`, then calls the `try_from` of the newtype, which handles the
 // conversion into actual values.
@@ -761,6 +812,16 @@ pub enum OsConstantsSerdeError {
     ValidationError(String),
 }
 
+#[derive(Debug, Error)]
+pub enum GasCostsError {
+    #[error("used syscall: {:?} is not supported in a Cairo 0 contract", selector)]
+    DeprecatedSyscall {selector: SyscallSelector},
+    #[error("used builtin: {:?} is not supported in a Cairo 1 contract", builtin)]
+    UnsupportedBuiltinInCairo1 {builtin: BuiltinName},
+    #[error("a virtual builtin cannot be used in a smart contract")]
+    VirtualBuiltin,
+}
+
 #[derive(Clone, Debug, Deserialize)]
 #[serde(try_from = "ResourceParamsRaw")]
 pub struct ResourcesParams {