diff --git a/crates/blockifier/src/execution/native/syscall_handler.rs b/crates/blockifier/src/execution/native/syscall_handler.rs
index 0c0869d5355..ca4778b57fb 100644
--- a/crates/blockifier/src/execution/native/syscall_handler.rs
+++ b/crates/blockifier/src/execution/native/syscall_handler.rs
@@ -32,7 +32,6 @@ use starknet_types_core::felt::Felt;
 
 use crate::execution::call_info::{MessageToL1, OrderedL2ToL1Message, Retdata};
 use crate::execution::common_hints::ExecutionMode;
-use crate::execution::contract_class::RunnableContractClass;
 use crate::execution::entry_point::{
     CallEntryPoint,
     CallType,
diff --git a/crates/mempool_test_utils/src/starknet_api_test_utils.rs b/crates/mempool_test_utils/src/starknet_api_test_utils.rs
index c9e685fbd7b..74a1a7b5a40 100644
--- a/crates/mempool_test_utils/src/starknet_api_test_utils.rs
+++ b/crates/mempool_test_utils/src/starknet_api_test_utils.rs
@@ -15,7 +15,8 @@ use starknet_api::block::GasPrice;
 use starknet_api::core::{ClassHash, CompiledClassHash, ContractAddress, Nonce};
 use starknet_api::executable_transaction::AccountTransaction;
 use starknet_api::execution_resources::GasAmount;
-use starknet_api::rpc_transaction::{ContractClass, RpcTransaction};
+use starknet_api::rpc_transaction::RpcTransaction;
+use starknet_api::state::SierraContractClass;
 use starknet_api::test_utils::declare::rpc_declare_tx;
 use starknet_api::test_utils::deploy_account::rpc_deploy_account_tx;
 use starknet_api::test_utils::invoke::{rpc_invoke_tx, InvokeTxArgs};
@@ -65,7 +66,7 @@ pub fn test_valid_resource_bounds() -> ValidResourceBounds {
 }
 
 /// Get the contract class used for testing.
-pub fn contract_class() -> ContractClass {
+pub fn contract_class() -> SierraContractClass {
     env::set_current_dir(resolve_project_relative_path(TEST_FILES_FOLDER).unwrap())
         .expect("Couldn't set working dir.");
     let json_file_path = Path::new(CONTRACT_CLASS_FILE);
diff --git a/crates/papyrus_protobuf/src/converters/rpc_transaction.rs b/crates/papyrus_protobuf/src/converters/rpc_transaction.rs
index 234a31e3ffc..55998e14e8b 100644
--- a/crates/papyrus_protobuf/src/converters/rpc_transaction.rs
+++ b/crates/papyrus_protobuf/src/converters/rpc_transaction.rs
@@ -4,8 +4,6 @@ mod rpc_transaction_test;
 
 use prost::Message;
 use starknet_api::rpc_transaction::{
-    ContractClass,
-    EntryPointByType,
     RpcDeclareTransaction,
     RpcDeclareTransactionV3,
     RpcDeployAccountTransaction,
@@ -14,19 +12,17 @@ use starknet_api::rpc_transaction::{
     RpcInvokeTransactionV3,
     RpcTransaction,
 };
-use starknet_api::state::EntryPoint;
 use starknet_api::transaction::fields::{AllResourceBounds, ValidResourceBounds};
 use starknet_api::transaction::{
     DeclareTransactionV3,
     DeployAccountTransactionV3,
     InvokeTransactionV3,
 };
-use starknet_types_core::felt::Felt;
 
 use super::ProtobufConversionError;
 use crate::auto_impl_into_and_try_from_vec_u8;
 use crate::mempool::RpcTransactionWrapper;
-use crate::protobuf::{self, Felt252};
+use crate::protobuf::{self};
 
 auto_impl_into_and_try_from_vec_u8!(RpcTransactionWrapper, protobuf::RpcTransaction);
 
@@ -330,63 +326,3 @@ impl From<AllResourceBounds> for protobuf::ResourceBounds {
         ValidResourceBounds::AllResources(value).into()
     }
 }
-
-impl TryFrom<protobuf::Cairo1Class> for ContractClass {
-    type Error = ProtobufConversionError;
-    fn try_from(value: protobuf::Cairo1Class) -> Result<Self, Self::Error> {
-        let sierra_program =
-            value.program.into_iter().map(Felt::try_from).collect::<Result<Vec<_>, _>>()?;
-        let contract_class_version = value.contract_class_version;
-        let entry_points = value.entry_points.ok_or(ProtobufConversionError::MissingField {
-            field_description: "Cairo1Class::entry_points_by_type",
-        })?;
-        let entry_points_by_type = EntryPointByType {
-            constructor: entry_points
-                .constructors
-                .into_iter()
-                .map(EntryPoint::try_from)
-                .collect::<Result<Vec<_>, _>>()?,
-            external: entry_points
-                .externals
-                .into_iter()
-                .map(EntryPoint::try_from)
-                .collect::<Result<Vec<_>, _>>()?,
-            l1handler: entry_points
-                .l1_handlers
-                .into_iter()
-                .map(EntryPoint::try_from)
-                .collect::<Result<Vec<_>, _>>()?,
-        };
-        let abi = value.abi;
-        Ok(Self { sierra_program, contract_class_version, entry_points_by_type, abi })
-    }
-}
-
-impl From<ContractClass> for protobuf::Cairo1Class {
-    fn from(value: ContractClass) -> Self {
-        let program = value.sierra_program.into_iter().map(Felt252::from).collect();
-        let contract_class_version = value.contract_class_version;
-        let entry_points = protobuf::Cairo1EntryPoints {
-            constructors: value
-                .entry_points_by_type
-                .constructor
-                .into_iter()
-                .map(protobuf::SierraEntryPoint::from)
-                .collect(),
-            externals: value
-                .entry_points_by_type
-                .external
-                .into_iter()
-                .map(protobuf::SierraEntryPoint::from)
-                .collect(),
-            l1_handlers: value
-                .entry_points_by_type
-                .l1handler
-                .into_iter()
-                .map(protobuf::SierraEntryPoint::from)
-                .collect(),
-        };
-        let abi = value.abi;
-        Self { program, contract_class_version, entry_points: Some(entry_points), abi }
-    }
-}
diff --git a/crates/papyrus_test_utils/src/lib.rs b/crates/papyrus_test_utils/src/lib.rs
index e930cf6e60e..2dbf884e806 100644
--- a/crates/papyrus_test_utils/src/lib.rs
+++ b/crates/papyrus_test_utils/src/lib.rs
@@ -88,7 +88,6 @@ use starknet_api::deprecated_contract_class::{
 use starknet_api::execution_resources::{Builtin, ExecutionResources, GasAmount, GasVector};
 use starknet_api::hash::{PoseidonHash, StarkHash};
 use starknet_api::rpc_transaction::{
-    ContractClass as RpcContractClass,
     EntryPointByType as RpcEntryPointByType,
     EntryPointByType,
     RpcDeclareTransaction,
@@ -750,12 +749,6 @@ auto_impl_get_test_instance! {
         pub max_amount: GasAmount,
         pub max_price_per_unit: GasPrice,
     }
-    pub struct RpcContractClass {
-        pub sierra_program: Vec<Felt>,
-        pub contract_class_version: String,
-        pub entry_points_by_type: RpcEntryPointByType,
-        pub abi: String,
-    }
     pub enum RpcTransaction {
         Declare(RpcDeclareTransaction) = 0,
         DeployAccount(RpcDeployAccountTransaction) = 1,
@@ -769,7 +762,7 @@ auto_impl_get_test_instance! {
         pub tip: Tip,
         pub signature: TransactionSignature,
         pub nonce: Nonce,
-        pub contract_class: RpcContractClass,
+        pub contract_class: SierraContractClass,
         pub compiled_class_hash: CompiledClassHash,
         pub sender_address: ContractAddress,
         pub nonce_data_availability_mode: DataAvailabilityMode,
diff --git a/crates/starknet_api/src/rpc_transaction.rs b/crates/starknet_api/src/rpc_transaction.rs
index 4607fdd45d5..49295a230d1 100644
--- a/crates/starknet_api/src/rpc_transaction.rs
+++ b/crates/starknet_api/src/rpc_transaction.rs
@@ -5,7 +5,6 @@ mod rpc_transaction_test;
 use std::collections::HashMap;
 
 use serde::{Deserialize, Serialize};
-use starknet_types_core::felt::Felt;
 
 use crate::contract_class::EntryPointType;
 use crate::core::{
@@ -16,7 +15,7 @@ use crate::core::{
     Nonce,
 };
 use crate::data_availability::DataAvailabilityMode;
-use crate::state::EntryPoint;
+use crate::state::{EntryPoint, SierraContractClass};
 use crate::transaction::fields::{
     AccountDeploymentData,
     AllResourceBounds,
@@ -180,7 +179,7 @@ pub struct RpcDeclareTransactionV3 {
     pub compiled_class_hash: CompiledClassHash,
     pub signature: TransactionSignature,
     pub nonce: Nonce,
-    pub contract_class: ContractClass,
+    pub contract_class: SierraContractClass,
     pub resource_bounds: AllResourceBounds,
     pub tip: Tip,
     pub paymaster_data: PaymasterData,
@@ -272,15 +271,6 @@ impl From<RpcInvokeTransactionV3> for InvokeTransactionV3 {
     }
 }
 
-// The contract class in SN_API state doesn't have `contract_class_version`, not following the spec.
-#[derive(Clone, Debug, Default, Deserialize, Eq, PartialEq, Serialize, Hash)]
-pub struct ContractClass {
-    pub sierra_program: Vec<Felt>,
-    pub contract_class_version: String,
-    pub entry_points_by_type: EntryPointByType,
-    pub abi: String,
-}
-
 // TODO(Aviv): remove duplication with sequencer/crates/papyrus_rpc/src/v0_8/state.rs
 #[derive(Debug, Clone, Default, Eq, PartialEq, Deserialize, Serialize, Hash)]
 pub struct EntryPointByType {
diff --git a/crates/starknet_api/src/rpc_transaction_test.rs b/crates/starknet_api/src/rpc_transaction_test.rs
index f12acce012e..7854a5d9297 100644
--- a/crates/starknet_api/src/rpc_transaction_test.rs
+++ b/crates/starknet_api/src/rpc_transaction_test.rs
@@ -7,7 +7,6 @@ use crate::block::GasPrice;
 use crate::core::CompiledClassHash;
 use crate::execution_resources::GasAmount;
 use crate::rpc_transaction::{
-    ContractClass,
     DataAvailabilityMode,
     RpcDeclareTransaction,
     RpcDeclareTransactionV3,
@@ -15,6 +14,7 @@ use crate::rpc_transaction::{
     RpcDeployAccountTransactionV3,
     RpcTransaction,
 };
+use crate::state::SierraContractClass;
 use crate::test_utils::invoke::{rpc_invoke_tx, InvokeTxArgs};
 use crate::transaction::fields::{
     AccountDeploymentData,
@@ -40,7 +40,7 @@ fn create_resource_bounds_for_testing() -> AllResourceBounds {
 
 fn create_declare_v3() -> RpcDeclareTransaction {
     RpcDeclareTransaction::V3(RpcDeclareTransactionV3 {
-        contract_class: ContractClass::default(),
+        contract_class: SierraContractClass::default(),
         resource_bounds: create_resource_bounds_for_testing(),
         tip: Tip(1),
         signature: TransactionSignature(vec![Felt::ONE, Felt::TWO]),
diff --git a/crates/starknet_api/src/state.rs b/crates/starknet_api/src/state.rs
index 8bfb841bef4..5de7b488652 100644
--- a/crates/starknet_api/src/state.rs
+++ b/crates/starknet_api/src/state.rs
@@ -209,7 +209,7 @@ impl StorageKey {
 impl_from_through_intermediate!(u128, StorageKey, u8, u16, u32, u64);
 
 /// A contract class.
-#[derive(Debug, Clone, Default, Eq, PartialEq, Deserialize, Serialize)]
+#[derive(Debug, Clone, Default, Eq, PartialEq, Deserialize, Serialize, Hash)]
 pub struct SierraContractClass {
     pub sierra_program: Vec<Felt>,
     pub contract_class_version: String,
diff --git a/crates/starknet_api/src/test_utils/declare.rs b/crates/starknet_api/src/test_utils/declare.rs
index 141cf964b92..8f905add897 100644
--- a/crates/starknet_api/src/test_utils/declare.rs
+++ b/crates/starknet_api/src/test_utils/declare.rs
@@ -3,12 +3,8 @@ use crate::contract_class::ClassInfo;
 use crate::core::{ClassHash, CompiledClassHash, ContractAddress, Nonce};
 use crate::data_availability::DataAvailabilityMode;
 use crate::executable_transaction::DeclareTransaction as ExecutableDeclareTransaction;
-use crate::rpc_transaction::{
-    ContractClass,
-    RpcDeclareTransaction,
-    RpcDeclareTransactionV3,
-    RpcTransaction,
-};
+use crate::rpc_transaction::{RpcDeclareTransaction, RpcDeclareTransactionV3, RpcTransaction};
+use crate::state::SierraContractClass;
 use crate::transaction::fields::{
     AccountDeploymentData,
     Fee,
@@ -142,7 +138,7 @@ pub fn executable_declare_tx(
 
 pub fn rpc_declare_tx(
     declare_tx_args: DeclareTxArgs,
-    contract_class: ContractClass,
+    contract_class: SierraContractClass,
 ) -> RpcTransaction {
     if declare_tx_args.version != TransactionVersion::THREE {
         panic!("Unsupported transaction version: {:?}.", declare_tx_args.version);
diff --git a/crates/starknet_gateway/src/stateless_transaction_validator.rs b/crates/starknet_gateway/src/stateless_transaction_validator.rs
index 8dbd815540b..871e2a3d3ce 100644
--- a/crates/starknet_gateway/src/stateless_transaction_validator.rs
+++ b/crates/starknet_gateway/src/stateless_transaction_validator.rs
@@ -237,7 +237,7 @@ impl StatelessTransactionValidator {
 
     fn validate_class_length(
         &self,
-        contract_class: &starknet_api::rpc_transaction::ContractClass,
+        contract_class: &starknet_api::state::SierraContractClass,
     ) -> StatelessTransactionValidatorResult<()> {
         let contract_class_object_size = serde_json::to_string(&contract_class)
             .expect("Unexpected error serializing contract class.")
@@ -254,7 +254,7 @@ impl StatelessTransactionValidator {
 
     fn validate_entry_points_sorted_and_unique(
         &self,
-        contract_class: &starknet_api::rpc_transaction::ContractClass,
+        contract_class: &starknet_api::state::SierraContractClass,
     ) -> StatelessTransactionValidatorResult<()> {
         let is_sorted_unique = |entry_points: &[EntryPoint]| {
             entry_points.windows(2).all(|pair| pair[0].selector < pair[1].selector)
diff --git a/crates/starknet_gateway/src/stateless_transaction_validator_test.rs b/crates/starknet_gateway/src/stateless_transaction_validator_test.rs
index dd79ded4df7..f02600404ac 100644
--- a/crates/starknet_gateway/src/stateless_transaction_validator_test.rs
+++ b/crates/starknet_gateway/src/stateless_transaction_validator_test.rs
@@ -5,8 +5,8 @@ use assert_matches::assert_matches;
 use rstest::rstest;
 use starknet_api::core::{EntryPointSelector, L2_ADDRESS_UPPER_BOUND};
 use starknet_api::data_availability::DataAvailabilityMode;
-use starknet_api::rpc_transaction::{ContractClass, EntryPointByType};
-use starknet_api::state::EntryPoint;
+use starknet_api::rpc_transaction::EntryPointByType;
+use starknet_api::state::{EntryPoint, SierraContractClass};
 use starknet_api::test_utils::declare::rpc_declare_tx;
 use starknet_api::transaction::fields::{
     AccountDeploymentData,
@@ -356,10 +356,12 @@ fn test_declare_sierra_version_failure(
     #[case] sierra_program: Vec<Felt>,
     #[case] expected_error: StatelessTransactionValidatorError,
 ) {
+    use starknet_api::state::SierraContractClass;
+
     let tx_validator =
         StatelessTransactionValidator { config: DEFAULT_VALIDATOR_CONFIG_FOR_TESTING.clone() };
 
-    let contract_class = ContractClass { sierra_program, ..Default::default() };
+    let contract_class = SierraContractClass { sierra_program, ..Default::default() };
     let tx = rpc_declare_tx(declare_tx_args!(), contract_class);
 
     assert_eq!(tx_validator.validate(&tx).unwrap_err(), expected_error);
@@ -379,7 +381,7 @@ fn test_declare_sierra_version_sucsses(#[case] sierra_program: Vec<Felt>) {
     let tx_validator =
         StatelessTransactionValidator { config: DEFAULT_VALIDATOR_CONFIG_FOR_TESTING.clone() };
 
-    let contract_class = ContractClass { sierra_program, ..Default::default() };
+    let contract_class = SierraContractClass { sierra_program, ..Default::default() };
     let tx = rpc_declare_tx(declare_tx_args!(), contract_class);
 
     assert_matches!(tx_validator.validate(&tx), Ok(()));
@@ -394,7 +396,7 @@ fn test_declare_contract_class_size_too_long() {
             ..*DEFAULT_VALIDATOR_CONFIG_FOR_TESTING
         },
     };
-    let contract_class = ContractClass {
+    let contract_class = SierraContractClass {
         sierra_program: create_sierra_program(&MIN_SIERRA_VERSION),
         ..Default::default()
     };
@@ -458,7 +460,7 @@ fn test_declare_entry_points_not_sorted_by_selector(
     let tx_validator =
         StatelessTransactionValidator { config: DEFAULT_VALIDATOR_CONFIG_FOR_TESTING.clone() };
 
-    let contract_class = ContractClass {
+    let contract_class = SierraContractClass {
         sierra_program: create_sierra_program(&MIN_SIERRA_VERSION),
         entry_points_by_type: EntryPointByType {
             constructor: entry_points.clone(),
@@ -471,7 +473,7 @@ fn test_declare_entry_points_not_sorted_by_selector(
 
     assert_eq!(tx_validator.validate(&tx), expected);
 
-    let contract_class = ContractClass {
+    let contract_class = SierraContractClass {
         sierra_program: create_sierra_program(&MIN_SIERRA_VERSION),
         entry_points_by_type: EntryPointByType {
             constructor: vec![],
@@ -484,7 +486,7 @@ fn test_declare_entry_points_not_sorted_by_selector(
 
     assert_eq!(tx_validator.validate(&tx), expected);
 
-    let contract_class = ContractClass {
+    let contract_class = SierraContractClass {
         sierra_program: create_sierra_program(&MIN_SIERRA_VERSION),
         entry_points_by_type: EntryPointByType {
             constructor: vec![],
diff --git a/crates/starknet_gateway/src/test_utils.rs b/crates/starknet_gateway/src/test_utils.rs
index d8866fdffea..f92bb5bce8e 100644
--- a/crates/starknet_gateway/src/test_utils.rs
+++ b/crates/starknet_gateway/src/test_utils.rs
@@ -2,7 +2,8 @@ use starknet_api::block::GasPrice;
 use starknet_api::core::ContractAddress;
 use starknet_api::data_availability::DataAvailabilityMode;
 use starknet_api::execution_resources::GasAmount;
-use starknet_api::rpc_transaction::{ContractClass, RpcTransaction};
+use starknet_api::rpc_transaction::RpcTransaction;
+use starknet_api::state::SierraContractClass;
 use starknet_api::test_utils::declare::{rpc_declare_tx, TEST_SENDER_ADDRESS};
 use starknet_api::test_utils::deploy_account::rpc_deploy_account_tx;
 use starknet_api::test_utils::invoke::rpc_invoke_tx;
@@ -89,7 +90,7 @@ pub fn rpc_tx_for_testing(
     match tx_type {
         TransactionType::Declare => {
             // Minimal contract class.
-            let contract_class = ContractClass {
+            let contract_class = SierraContractClass {
                 sierra_program: vec![
                     // Sierra Version ID.
                     felt!(1_u32),
diff --git a/crates/starknet_sierra_compile/src/utils.rs b/crates/starknet_sierra_compile/src/utils.rs
index e96d0ada5ff..d02a6b7db2d 100644
--- a/crates/starknet_sierra_compile/src/utils.rs
+++ b/crates/starknet_sierra_compile/src/utils.rs
@@ -6,11 +6,11 @@ use cairo_lang_starknet_classes::contract_class::{
     ContractEntryPoints as CairoLangContractEntryPoints,
 };
 use cairo_lang_utils::bigint::BigUintAsHex;
-use starknet_api::rpc_transaction::{
-    ContractClass as RpcContractClass,
-    EntryPointByType as StarknetApiEntryPointByType,
+use starknet_api::rpc_transaction::EntryPointByType as StarknetApiEntryPointByType;
+use starknet_api::state::{
+    EntryPoint as StarknetApiEntryPoint,
+    SierraContractClass as RpcContractClass,
 };
-use starknet_api::state::EntryPoint as StarknetApiEntryPoint;
 use starknet_types_core::felt::Felt;
 
 /// Retruns a [`CairoLangContractClass`] struct ready for Sierra to Casm compilation. Note the `abi`