diff --git a/crates/gateway/src/errors.rs b/crates/gateway/src/errors.rs
index 4ff5cfe5..02e775ea 100644
--- a/crates/gateway/src/errors.rs
+++ b/crates/gateway/src/errors.rs
@@ -6,6 +6,7 @@ use blockifier::state::errors::StateError;
 use blockifier::transaction::errors::TransactionExecutionError;
 use cairo_vm::types::errors::program_errors::ProgramError;
 use starknet_api::block::BlockNumber;
+use starknet_api::core::CompiledClassHash;
 use starknet_api::transaction::{Resource, ResourceBounds};
 use starknet_api::StarknetApiError;
 use thiserror::Error;
@@ -18,6 +19,11 @@ use crate::compiler_version::{VersionId, VersionIdError};
 pub enum GatewayError {
     #[error(transparent)]
     CompilationError(#[from] starknet_sierra_compile::compile::CompilationUtilError),
+    #[error(
+        "The supplied compiled class hash {supplied:?} does not match the hash of the Casm class \
+         compiled from the supplied Sierra {hash_result:?}."
+    )]
+    CompiledClassHashMismatch { supplied: CompiledClassHash, hash_result: CompiledClassHash },
     #[error(transparent)]
     DeclaredContractClassError(#[from] ContractClassError),
     #[error(transparent)]
diff --git a/crates/gateway/src/gateway.rs b/crates/gateway/src/gateway.rs
index 54e3f38c..12464589 100644
--- a/crates/gateway/src/gateway.rs
+++ b/crates/gateway/src/gateway.rs
@@ -7,6 +7,8 @@ use axum::extract::State;
 use axum::routing::{get, post};
 use axum::{Json, Router};
 use blockifier::execution::contract_class::{ClassInfo, ContractClass, ContractClassV1};
+use blockifier::execution::execution_utils::felt_to_stark_felt;
+use starknet_api::core::CompiledClassHash;
 use starknet_api::rpc_transaction::{RPCDeclareTransaction, RPCTransaction};
 use starknet_api::transaction::TransactionHash;
 use starknet_mempool_types::communication::SharedMempoolClient;
@@ -157,6 +159,15 @@ pub fn compile_contract_class(declare_tx: &RPCDeclareTransaction) -> GatewayResu
         }
     };
 
+    let hash_result =
+        CompiledClassHash(felt_to_stark_felt(&casm_contract_class.compiled_class_hash()));
+    if hash_result != tx.compiled_class_hash {
+        return Err(GatewayError::CompiledClassHashMismatch {
+            supplied: tx.compiled_class_hash,
+            hash_result,
+        });
+    }
+
     // Convert Casm contract class to Starknet contract class directly.
     let blockifier_contract_class =
         ContractClass::V1(ContractClassV1::try_from(casm_contract_class)?);
diff --git a/crates/gateway/src/gateway_test.rs b/crates/gateway/src/gateway_test.rs
index 67f7c270..dc89505d 100644
--- a/crates/gateway/src/gateway_test.rs
+++ b/crates/gateway/src/gateway_test.rs
@@ -1,13 +1,16 @@
 use std::sync::Arc;
 
+use assert_matches::assert_matches;
 use axum::body::{Bytes, HttpBody};
 use axum::extract::State;
 use axum::http::StatusCode;
 use axum::response::{IntoResponse, Response};
 use blockifier::context::ChainInfo;
+use blockifier::execution::contract_class::ContractClass;
 use blockifier::test_utils::CairoVersion;
 use rstest::{fixture, rstest};
-use starknet_api::rpc_transaction::RPCTransaction;
+use starknet_api::core::CompiledClassHash;
+use starknet_api::rpc_transaction::{RPCDeclareTransaction, RPCTransaction};
 use starknet_api::transaction::TransactionHash;
 use starknet_mempool::communication::create_mempool_server;
 use starknet_mempool::mempool::Mempool;
@@ -16,6 +19,7 @@ use tokio::sync::mpsc::channel;
 use tokio::task;
 
 use crate::config::{StatefulTransactionValidatorConfig, StatelessTransactionValidatorConfig};
+use crate::errors::GatewayError;
 use crate::gateway::{add_tx, compile_contract_class, AppState, SharedMempoolClient};
 use crate::starknet_api_test_utils::{declare_tx, deploy_account_tx, invoke_tx};
 use crate::state_reader_test_utils::{
@@ -100,6 +104,47 @@ async fn test_add_tx(
     assert_eq!(tx_hash, serde_json::from_slice(response_bytes).unwrap());
 }
 
+#[test]
+fn test_compile_contract_class_failure() {
+    let mut declare_tx_v3 = match declare_tx() {
+        RPCTransaction::Declare(RPCDeclareTransaction::V3(declare_tx)) => declare_tx,
+        _ => panic!("Invalid transaction type"),
+    };
+    let expected_hash_result = declare_tx_v3.compiled_class_hash;
+    let supplied_hash = CompiledClassHash::default();
+
+    declare_tx_v3.compiled_class_hash = supplied_hash;
+    let declare_tx = RPCDeclareTransaction::V3(declare_tx_v3);
+
+    let result = compile_contract_class(&declare_tx);
+    assert_matches!(
+        result.unwrap_err(),
+        GatewayError::CompiledClassHashMismatch { supplied, hash_result }
+        if supplied == supplied_hash && hash_result == expected_hash_result
+    );
+}
+
+#[test]
+fn test_compile_contract_class() {
+    let declare_tx = match declare_tx() {
+        RPCTransaction::Declare(declare_tx) => declare_tx,
+        _ => panic!("Invalid transaction type"),
+    };
+    let RPCDeclareTransaction::V3(declare_tx_v3) = &declare_tx;
+    let contract_class = &declare_tx_v3.contract_class;
+
+    let result = compile_contract_class(&declare_tx);
+    assert_matches!(
+        result,
+        Ok(class_info)
+        if (
+            matches!(class_info.contract_class(), ContractClass::V1(_))
+            && class_info.sierra_program_length() == contract_class.sierra_program.len()
+            && class_info.abi_length() == contract_class.abi.len()
+        )
+    );
+}
+
 async fn to_bytes(res: Response) -> Bytes {
     res.into_body().collect().await.unwrap().to_bytes()
 }
diff --git a/crates/gateway/src/starknet_api_test_utils.rs b/crates/gateway/src/starknet_api_test_utils.rs
index 598ba9f6..3f58bd32 100644
--- a/crates/gateway/src/starknet_api_test_utils.rs
+++ b/crates/gateway/src/starknet_api_test_utils.rs
@@ -18,7 +18,10 @@ use starknet_api::transaction::{
     TransactionSignature, TransactionVersion,
 };
 use starknet_api::{calldata, stark_felt};
-use test_utils::{get_absolute_path, CONTRACT_CLASS_FILE, TEST_FILES_FOLDER};
+use test_utils::{
+    get_absolute_path, COMPILED_CLASS_HASH_OF_CONTRACT_CLASS, CONTRACT_CLASS_FILE,
+    TEST_FILES_FOLDER,
+};
 
 use crate::{declare_tx_args, deploy_account_tx_args, invoke_tx_args};
 
@@ -97,6 +100,7 @@ pub fn declare_tx() -> RPCTransaction {
     env::set_current_dir(get_absolute_path(TEST_FILES_FOLDER)).expect("Couldn't set working dir.");
     let json_file_path = Path::new(CONTRACT_CLASS_FILE);
     let contract_class = serde_json::from_reader(File::open(json_file_path).unwrap()).unwrap();
+    let compiled_class_hash = CompiledClassHash(stark_felt!(COMPILED_CLASS_HASH_OF_CONTRACT_CLASS));
 
     let cairo_version = CairoVersion::Cairo1;
     let account_contract = FeatureContract::AccountWithoutValidations(cairo_version);
@@ -109,7 +113,8 @@ pub fn declare_tx() -> RPCTransaction {
         sender_address: account_address,
         resource_bounds: executable_resource_bounds_mapping(),
         nonce,
-        contract_class
+        class_hash: compiled_class_hash,
+        contract_class,
     ))
 }
 
diff --git a/crates/gateway/src/stateful_transaction_validator_test.rs b/crates/gateway/src/stateful_transaction_validator_test.rs
index f8ead84f..5553922a 100644
--- a/crates/gateway/src/stateful_transaction_validator_test.rs
+++ b/crates/gateway/src/stateful_transaction_validator_test.rs
@@ -46,7 +46,7 @@ use crate::stateful_transaction_validator::StatefulTransactionValidator;
     declare_tx(),
     local_test_state_reader_factory(CairoVersion::Cairo1, false),
     Ok(TransactionHash(StarkFelt::try_from(
-        "0x0278ed2700d5a30254a6b895d4e1140438d7d1a3b2b2ce0c096a9d5ee1c61f39"
+        "0x02da54b89e00d2e201f8e3ed2bcc715a69e89aefdce88aff2d2facb8dec55c0a"
     ).unwrap()))
 )]
 #[case::invalid_tx(
diff --git a/crates/test_utils/src/lib.rs b/crates/test_utils/src/lib.rs
index 23634bc6..571ec7f3 100644
--- a/crates/test_utils/src/lib.rs
+++ b/crates/test_utils/src/lib.rs
@@ -3,6 +3,8 @@ use std::path::{Path, PathBuf};
 
 pub const TEST_FILES_FOLDER: &str = "crates/test_utils/test_files";
 pub const CONTRACT_CLASS_FILE: &str = "contract_class.json";
+pub const COMPILED_CLASS_HASH_OF_CONTRACT_CLASS: &str =
+    "0x01e4f1248860f32c336f93f2595099aaa4959be515e40b75472709ef5243ae17";
 
 /// Returns the absolute path from the project root.
 pub fn get_absolute_path(relative_path: &str) -> PathBuf {