feat: post compilation size limit validation

config/mempool_default_config.json

@@ -9,6 +9,16 @@
     "privacy": "Public",
     "value": true
   },
+  "gateway_config.compiler_config.max_casm_bytecode_size": {
+    "description": "Limitation of contract bytecode size.",
+    "privacy": "Public",
+    "value": 81920
+  },
+  "gateway_config.compiler_config.max_raw_casm_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)?;
 
         Ok(ClassInfo::new(
             &ContractClass::V1(ContractClassV1::try_from(casm_contract_class)?),
@@ -63,7 +63,16 @@ impl GatewayCompiler {
         Ok(casm_contract_class)
     }
 
+    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.
+    /// Validates that the Casm class is structured correctly. Specifically, this function ensures
+    /// that the builtins used by this class are supported and ordered correctly, as expected by
+    /// the OS.
     fn validate_casm_class(&self, contract_class: &CasmContractClass) -> Result<(), GatewayError> {
         let CasmContractEntryPoints { external, l1_handler, constructor } =
             &contract_class.entry_points_by_type;
@@ -81,6 +90,35 @@ impl GatewayCompiler {
         }
         Ok(())
     }
+
+    // TODO(Arni): consider validating the size of other members of the Casm class. Cosider removing
+    // the validation of the raw class size. The validation should be linked to the way the class is
+    // saved in Papyrus etc.
+    /// Validates that the Casm class is within size limit. Specifically, this function validates
+    /// the size of the bytecode and the serialized class.
+    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_casm_bytecode_size {
+            return Err(GatewayError::CasmBytecodeSizeTooLarge {
+                bytecode_size,
+                max_bytecode_size: self.config.max_casm_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_casm_class_size {
+            return Err(GatewayError::CasmContractClassObjectSizeTooLarge {
+                contract_class_object_size,
+                max_contract_class_object_size: self.config.max_raw_casm_class_size,
+            });
+        }
+
+        Ok(())
+    }
 }
 
 // TODO(Arni): Add to a config.

crates/gateway/src/compilation_test.rs

@@ -14,6 +14,7 @@ use starknet_sierra_compile::errors::CompilationUtilError;
 use starknet_sierra_compile::utils::into_contract_class_for_compilation;
 
 use crate::compilation::{validate_compiled_class_hash, GatewayCompiler};
+use crate::config::GatewayCompilerConfig;
 use crate::errors::GatewayError;
 
 #[fixture]
@@ -37,6 +38,24 @@ fn test_compile_contract_class_compiled_class_hash_mismatch(
     );
 }
 
+#[rstest]
+fn test_compile_contract_class_bytecode_size_validation(casm_contract_class: CasmContractClass) {
+    let gateway_compiler = GatewayCompiler {
+        config: GatewayCompilerConfig { max_casm_bytecode_size: 1, ..Default::default() },
+    };
+    let result = gateway_compiler.validate_casm_class_size(&casm_contract_class);
+    assert_matches!(result.unwrap_err(), GatewayError::CasmBytecodeSizeTooLarge { .. })
+}
+
+#[rstest]
+fn test_compile_contract_class_raw_class_size_validation(casm_contract_class: CasmContractClass) {
+    let gateway_compiler = GatewayCompiler {
+        config: GatewayCompilerConfig { max_raw_casm_class_size: 1, ..Default::default() },
+    };
+    let result = gateway_compiler.validate_casm_class_size(&casm_contract_class);
+    assert_matches!(result.unwrap_err(), GatewayError::CasmContractClassObjectSizeTooLarge { .. })
+}
+
 #[rstest]
 fn test_compile_contract_class_bad_sierra(
     gateway_compiler: GatewayCompiler,

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 +298,36 @@ impl StatefulTransactionValidatorConfig {
         }
     }
 }
+#[derive(Clone, Copy, Debug, Serialize, Deserialize, Validate, PartialEq)]
+pub struct GatewayCompilerConfig {
+    pub max_casm_bytecode_size: usize,
+    pub max_raw_casm_class_size: usize,
+}
 
-#[derive(Clone, Copy, Debug, Default, Serialize, Deserialize, Validate, PartialEq)]
-pub struct GatewayCompilerConfig {}
+impl Default for GatewayCompilerConfig {
+    fn default() -> Self {
+        Self {
+            max_casm_bytecode_size: MAX_BYTECODE_SIZE,
+            max_raw_casm_class_size: MAX_RAW_CLASS_SIZE,
+        }
+    }
+}
 
 impl SerializeConfig for GatewayCompilerConfig {
     fn dump(&self) -> BTreeMap<ParamPath, SerializedParam> {
-        BTreeMap::new()
+        BTreeMap::from_iter([
+            ser_param(
+                "max_casm_bytecode_size",
+                &self.max_casm_bytecode_size,
+                "Limitation of contract bytecode size.",
+                ParamPrivacyInput::Public,
+            ),
+            ser_param(
+                "max_raw_casm_class_size",
+                &self.max_raw_casm_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

@@ -30,19 +30,12 @@ pub fn app_state(
 ) -> AppState {
     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,
-                ..Default::default()
-            },
+            config: StatelessTransactionValidatorConfig::default(),
         },
         stateful_tx_validator: Arc::new(StatefulTransactionValidator {
             config: StatefulTransactionValidatorConfig::create_for_testing(),
         }),
-        gateway_compiler: GatewayCompiler { config: GatewayCompilerConfig {} },
+        gateway_compiler: GatewayCompiler { config: GatewayCompilerConfig::default() },
         state_reader_factory: Arc::new(state_reader_factory),
         mempool_client,
     }

crates/gateway/src/stateful_transaction_validator_test.rs

@@ -96,7 +96,7 @@ fn test_stateful_tx_validator(
 ) {
     let optional_class_info = match &external_tx {
         RPCTransaction::Declare(declare_tx) => Some(
-            GatewayCompiler { config: GatewayCompilerConfig {} }
+            GatewayCompiler { config: GatewayCompilerConfig::default() }
                 .process_declare_tx(declare_tx)
                 .unwrap(),
         ),