feat: post compilation size limit validation

config/default_config.json

@@ -9,6 +9,16 @@
     "privacy": "Public",
     "value": true
   },
+  "gateway_config.compiler_config.max_bytecode_size": {
+    "description": "Limitation of contract bytecode size",
+    "privacy": "Public",
+    "value": 81920
+  },
+  "gateway_config.compiler_config.max_raw_class_size": {
+    "description": "Limitation of contract class object size",
+    "privacy": "Public",
+    "value": 4089446
+  },
   "gateway_config.network_config.ip": {
     "description": "The gateway server ip.",
     "privacy": "Public",

crates/gateway/src/compilation.rs

@@ -20,9 +20,9 @@ use crate::utils::is_subsequence;
 #[path = "compilation_test.rs"]
 mod compilation_test;
 
+// TODO(Define a function for `compile_contract_class` - which ignores the `config` parameter).
 #[derive(Clone)]
 pub struct GatewayCompiler {
-    #[allow(dead_code)]
     pub config: GatewayCompilerConfig,
 }
 
@@ -41,7 +41,7 @@ impl GatewayCompiler {
         let casm_contract_class = self.compile(cairo_lang_contract_class)?;
 
         validate_compiled_class_hash(&casm_contract_class, tx.compiled_class_hash)?;
-        self.validate_casm_class(&casm_contract_class)?;
+        self.validate_casm(&casm_contract_class)?;
 
         build_result_class_info(
             casm_contract_class,
@@ -66,6 +66,12 @@ impl GatewayCompiler {
         }
     }
 
+    fn validate_casm(&self, casm_contract_class: &CasmContractClass) -> Result<(), GatewayError> {
+        self.validate_casm_class(casm_contract_class)?;
+        self.validate_casm_class_size(casm_contract_class)?;
+        Ok(())
+    }
+
     // TODO(Arni): Add test.
     fn validate_casm_class(&self, contract_class: &CasmContractClass) -> Result<(), GatewayError> {
         let CasmContractEntryPoints { external, l1_handler, constructor } =
@@ -84,6 +90,30 @@ impl GatewayCompiler {
         }
         Ok(())
     }
+
+    fn validate_casm_class_size(
+        &self,
+        casm_contract_class: &CasmContractClass,
+    ) -> Result<(), GatewayError> {
+        let bytecode_size = casm_contract_class.bytecode.len();
+        if bytecode_size > self.config.max_bytecode_size {
+            return Err(GatewayError::CasmBytecodeSizeTooLarge {
+                bytecode_size,
+                max_bytecode_size: self.config.max_bytecode_size,
+            });
+        }
+        let contract_class_object_size = serde_json::to_string(&casm_contract_class)
+            .expect("Unexpected error serializing Casm contract class.")
+            .len();
+        if contract_class_object_size > self.config.max_raw_class_size {
+            return Err(GatewayError::CasmContractClassObjectSizeTooLarge {
+                contract_class_object_size,
+                max_contract_class_object_size: self.config.max_raw_class_size,
+            });
+        }
+
+        Ok(())
+    }
 }
 
 // TODO(Arni): Add to a config.

crates/gateway/src/compilation_test.rs

@@ -8,6 +8,7 @@ use starknet_api::rpc_transaction::{RPCDeclareTransaction, RPCTransaction};
 use starknet_sierra_compile::errors::CompilationUtilError;
 
 use crate::compilation::GatewayCompiler;
+use crate::config::GatewayCompilerConfig;
 use crate::errors::GatewayError;
 
 #[fixture]
@@ -35,6 +36,50 @@ fn test_compile_contract_class_compiled_class_hash_missmatch(gateway_compiler: G
     );
 }
 
+#[rstest]
+#[case::bytecode_size(
+    GatewayCompilerConfig { max_bytecode_size: 1, max_raw_class_size: usize::MAX},
+    GatewayError::CasmBytecodeSizeTooLarge { bytecode_size: 4800, max_bytecode_size: 1 }
+)]
+#[case::raw_class_size(
+    GatewayCompilerConfig { max_bytecode_size: usize::MAX, max_raw_class_size: 1},
+    GatewayError::CasmContractClassObjectSizeTooLarge {
+        contract_class_object_size: 111037, max_contract_class_object_size: 1
+    }
+)]
+fn test_compile_contract_class_size_validation(
+    #[case] sierra_to_casm_compilation_config: GatewayCompilerConfig,
+    #[case] expected_error: GatewayError,
+) {
+    let declare_tx = match declare_tx() {
+        RPCTransaction::Declare(declare_tx) => declare_tx,
+        _ => panic!("Invalid transaction type"),
+    };
+
+    let gateway_compiler = GatewayCompiler { config: sierra_to_casm_compilation_config };
+    let result = gateway_compiler.handle_declare_tx(&declare_tx);
+    if let GatewayError::CasmBytecodeSizeTooLarge {
+        bytecode_size: expected_bytecode_size, ..
+    } = expected_error
+    {
+        assert_matches!(
+            result.unwrap_err(),
+            GatewayError::CasmBytecodeSizeTooLarge { bytecode_size, .. }
+            if bytecode_size == expected_bytecode_size
+        )
+    } else if let GatewayError::CasmContractClassObjectSizeTooLarge {
+        contract_class_object_size: expected_contract_class_object_size,
+        ..
+    } = expected_error
+    {
+        assert_matches!(
+            result.unwrap_err(),
+            GatewayError::CasmContractClassObjectSizeTooLarge { contract_class_object_size, .. }
+            if contract_class_object_size == expected_contract_class_object_size
+        )
+    }
+}
+
 #[rstest]
 fn test_compile_contract_class_bad_sierra(gateway_compiler: GatewayCompiler) {
     let mut tx = assert_matches!(

crates/gateway/src/config.rs

@@ -11,6 +11,9 @@ use validator::Validate;
 
 use crate::compiler_version::VersionId;
 
+const MAX_BYTECODE_SIZE: usize = 81920;
+const MAX_RAW_CLASS_SIZE: usize = 4089446;
+
 #[derive(Clone, Debug, Default, Serialize, Deserialize, Validate, PartialEq)]
 pub struct GatewayConfig {
     pub network_config: GatewayNetworkConfig,
@@ -88,8 +91,8 @@ impl Default for StatelessTransactionValidatorConfig {
             validate_non_zero_l2_gas_fee: false,
             max_calldata_length: 4000,
             max_signature_length: 4000,
-            max_bytecode_size: 81920,
-            max_raw_class_size: 4089446,
+            max_bytecode_size: MAX_BYTECODE_SIZE,
+            max_raw_class_size: MAX_RAW_CLASS_SIZE,
             min_sierra_version: VersionId { major: 1, minor: 1, patch: 0 },
             max_sierra_version: VersionId { major: 1, minor: 5, patch: usize::MAX },
         }
@@ -295,12 +298,33 @@ impl StatefulTransactionValidatorConfig {
         }
     }
 }
+#[derive(Clone, Copy, Debug, Serialize, Deserialize, Validate, PartialEq)]
+pub struct GatewayCompilerConfig {
+    pub max_bytecode_size: usize,
+    pub max_raw_class_size: usize,
+}
 
-#[derive(Clone, Copy, Debug, Default, Serialize, Deserialize, Validate, PartialEq)]
-pub struct GatewayCompilerConfig {}
+impl Default for GatewayCompilerConfig {
+    fn default() -> Self {
+        Self { max_bytecode_size: MAX_BYTECODE_SIZE, max_raw_class_size: MAX_RAW_CLASS_SIZE }
+    }
+}
 
 impl SerializeConfig for GatewayCompilerConfig {
     fn dump(&self) -> BTreeMap<ParamPath, SerializedParam> {
-        BTreeMap::new()
+        BTreeMap::from_iter([
+            ser_param(
+                "max_bytecode_size",
+                &self.max_bytecode_size,
+                "Limitation of contract bytecode size",
+                ParamPrivacyInput::Public,
+            ),
+            ser_param(
+                "max_raw_class_size",
+                &self.max_raw_class_size,
+                "Limitation of contract class object size",
+                ParamPrivacyInput::Public,
+            ),
+        ])
     }
 }

crates/gateway/src/errors.rs

@@ -19,6 +19,19 @@ use crate::compiler_version::{VersionId, VersionIdError};
 /// Errors directed towards the end-user, as a result of gateway requests.
 #[derive(Debug, Error)]
 pub enum GatewayError {
+    #[error(
+        "Cannot declare Casm contract class with bytecode size of {bytecode_size}; max allowed \
+         size: {max_bytecode_size}."
+    )]
+    CasmBytecodeSizeTooLarge { bytecode_size: usize, max_bytecode_size: usize },
+    #[error(
+        "Cannot declare Casm contract class with size of {contract_class_object_size}; max \
+         allowed size: {max_contract_class_object_size}."
+    )]
+    CasmContractClassObjectSizeTooLarge {
+        contract_class_object_size: usize,
+        max_contract_class_object_size: usize,
+    },
     #[error(transparent)]
     CompilationError(#[from] CompilationUtilError),
     #[error(

crates/gateway/src/gateway_test.rs

@@ -40,21 +40,28 @@ pub fn app_state(
     mempool_client: SharedMempoolClient,
     state_reader_factory: TestStateReaderFactory,
 ) -> AppState {
+    const MAX_BYTECODE_SIZE: usize = 10000;
+    const MAX_RAW_CLASS_SIZE: usize = 1000000;
     AppState {
         stateless_tx_validator: StatelessTransactionValidator {
             config: StatelessTransactionValidatorConfig {
                 validate_non_zero_l1_gas_fee: true,
                 max_calldata_length: 10,
                 max_signature_length: 2,
-                max_bytecode_size: 10000,
-                max_raw_class_size: 1000000,
+                max_bytecode_size: MAX_BYTECODE_SIZE,
+                max_raw_class_size: MAX_RAW_CLASS_SIZE,
                 ..Default::default()
             },
         },
         stateful_tx_validator: Arc::new(StatefulTransactionValidator {
             config: StatefulTransactionValidatorConfig::create_for_testing(),
         }),
-        gateway_compiler: GatewayCompiler { config: GatewayCompilerConfig {} },
+        gateway_compiler: GatewayCompiler {
+            config: GatewayCompilerConfig {
+                max_bytecode_size: MAX_BYTECODE_SIZE,
+                max_raw_class_size: MAX_RAW_CLASS_SIZE,
+            },
+        },
         state_reader_factory: Arc::new(state_reader_factory),
         mempool_client,
     }

crates/gateway/src/stateful_transaction_validator_test.rs

@@ -82,7 +82,7 @@ fn test_stateful_tx_validator(
     };
     let optional_class_info = match &external_tx {
         RPCTransaction::Declare(declare_tx) => Some(
-            GatewayCompiler { config: GatewayCompilerConfig {} }
+            GatewayCompiler { config: GatewayCompilerConfig::default() }
                 .handle_declare_tx(declare_tx)
                 .unwrap(),
         ),