feat: post compilation size limit validation

config/default_config.json

@@ -9,6 +9,16 @@
     "privacy": "Public",
     "value": true
   },
+  "gateway_config.gateway_compiler_config.max_bytecode_size": {
+    "description": "The maximum bytecode size allowed for a contract.",
+    "privacy": "Public",
+    "value": 18446744073709551615
+  },
+  "gateway_config.gateway_compiler_config.max_raw_class_size": {
+    "description": "The maximum raw class size allowed for a contract.",
+    "privacy": "Public",
+    "value": 18446744073709551615
+  },
   "gateway_config.network_config.ip": {
     "description": "The gateway server ip.",
     "privacy": "Public",
@@ -49,11 +59,21 @@
     "privacy": "Public",
     "value": 0
   },
+  "gateway_config.stateless_tx_validator_config.max_bytecode_size": {
+    "description": "The maximum bytecode size allowed for a contract.",
+    "privacy": "Public",
+    "value": 0
+  },
   "gateway_config.stateless_tx_validator_config.max_calldata_length": {
     "description": "Validates that a transaction has calldata length less than or equal to this value.",
     "privacy": "Public",
     "value": 0
   },
+  "gateway_config.stateless_tx_validator_config.max_raw_class_size": {
+    "description": "The maximum raw class size allowed for a contract.",
+    "privacy": "Public",
+    "value": 0
+  },
   "gateway_config.stateless_tx_validator_config.max_sierra_version.major": {
     "description": "The major version of the configuration.",
     "privacy": "Public",

crates/gateway/src/compilation.rs

@@ -19,6 +19,15 @@ use crate::utils::is_subsequence;
 #[path = "compilation_test.rs"]
 mod compilation_test;
 
+// TODO(Arni): Move the gateway compilation util to a dedicated file.
+// TODO(Arni): Find a better place for this config.
+pub struct SierraToCasmCompilationConfig {
+    pub max_bytecode_size: usize,
+    pub max_raw_class_size: usize,
+}
+
+// TODO(Define a function for `compile_contract_class` - which ignores the `config` parameter).
+
 pub struct GatewayCompiler {
     pub config: GatewayCompilerConfig,
 }
@@ -47,6 +56,7 @@ impl GatewayCompiler {
             }
         };
         self.validate_casm_class(&casm_contract_class)?;
+        self.validate_casm_class_size(&casm_contract_class)?;
 
         let hash_result = CompiledClassHash(casm_contract_class.compiled_class_hash());
         if hash_result != tx.compiled_class_hash {
@@ -85,6 +95,47 @@ 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,
+            });
+        }
+
+        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_config.rs

@@ -1,15 +1,37 @@
 use std::collections::BTreeMap;
 
-use papyrus_config::dumping::SerializeConfig;
-use papyrus_config::{ParamPath, SerializedParam};
+use papyrus_config::dumping::{ser_param, SerializeConfig};
+use papyrus_config::{ParamPath, ParamPrivacyInput, SerializedParam};
 use serde::{Deserialize, Serialize};
 use validator::Validate;
 
-#[derive(Clone, Debug, Default, Serialize, Deserialize, Validate, PartialEq)]
-pub struct GatewayCompilerConfig {}
+#[derive(Clone, Debug, Serialize, Deserialize, Validate, PartialEq)]
+pub struct GatewayCompilerConfig {
+    pub max_bytecode_size: usize,
+    pub max_raw_class_size: usize,
+}
+
+impl Default for GatewayCompilerConfig {
+    fn default() -> Self {
+        Self { max_bytecode_size: usize::MAX, max_raw_class_size: usize::MAX }
+    }
+}
 
 impl SerializeConfig for GatewayCompilerConfig {
     fn dump(&self) -> BTreeMap<ParamPath, SerializedParam> {
-        BTreeMap::new()
+        BTreeMap::from_iter([
+            ser_param(
+                "max_bytecode_size",
+                &self.max_bytecode_size,
+                "The maximum bytecode size allowed for a contract.",
+                ParamPrivacyInput::Public,
+            ),
+            ser_param(
+                "max_raw_class_size",
+                &self.max_raw_class_size,
+                "The maximum raw class size allowed for a contract.",
+                ParamPrivacyInput::Public,
+            ),
+        ])
     }
 }

crates/gateway/src/compilation_test.rs

@@ -1,12 +1,14 @@
 use assert_matches::assert_matches;
 use blockifier::execution::contract_class::ContractClass;
 use cairo_lang_starknet_classes::allowed_libfuncs::AllowedLibfuncsError;
+use rstest::rstest;
 use starknet_api::core::CompiledClassHash;
 use starknet_api::rpc_transaction::{RPCDeclareTransaction, RPCTransaction};
 use starknet_sierra_compile::errors::CompilationUtilError;
 use test_utils::starknet_api_test_utils::declare_tx;
 
 use crate::compilation::GatewayCompiler;
+use crate::compilation_config::GatewayCompilerConfig;
 use crate::errors::GatewayError;
 
 #[test]
@@ -29,6 +31,50 @@ fn test_compile_contract_class_compiled_class_hash_missmatch() {
     );
 }
 
+#[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.compile_contract_class(&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
+        )
+    }
+}
+
 #[test]
 fn test_compile_contract_class_bad_sierra() {
     let mut tx = assert_matches!(

crates/gateway/src/config.rs

@@ -125,6 +125,18 @@ impl SerializeConfig for StatelessTransactionValidatorConfig {
                  value.",
                 ParamPrivacyInput::Public,
             ),
+            ser_param(
+                "max_bytecode_size",
+                &self.max_bytecode_size,
+                "The maximum bytecode size allowed for a contract.",
+                ParamPrivacyInput::Public,
+            ),
+            ser_param(
+                "max_raw_class_size",
+                &self.max_raw_class_size,
+                "The maximum raw class size allowed for a contract.",
+                ParamPrivacyInput::Public,
+            ),
         ]);
         vec![
             members,

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(