fix: create collision state

crates/evm/src/backend/starknet_backend.cairo

@@ -42,7 +42,7 @@ pub fn deploy(evm_address: EthAddress) -> Result<Address, EVMError> {
     // Unlike CAs, there is not check for the existence of an EOA prealably to calling
     // `EOATrait::deploy` - therefore, we need to check that there is no collision.
     let mut is_deployed = evm_address.is_deployed();
-    ensure(!is_deployed, EVMError::DeployError(EOA_EXISTS))?;
+    ensure(!is_deployed, EVMError::Collision)?;
 
     let mut kakarot_state = KakarotCore::unsafe_new_contract_state();
     let uninitialized_account_class_hash = kakarot_state.uninitialized_account_class_hash();

crates/evm/src/errors.cairo

@@ -54,7 +54,7 @@ pub enum EVMError {
     InvalidParameter: felt252,
     InvalidOpcode: u8,
     WriteInStaticContext,
-    DeployError: felt252,
+    Collision,
     OutOfGas,
     Assertion,
     DepthLimit,
@@ -78,7 +78,7 @@ pub impl EVMErrorImpl of EVMErrorTrait {
             // TODO: refactor with dynamic strings once supported
             EVMError::InvalidOpcode => 'invalid opcode'.into(),
             EVMError::WriteInStaticContext => 'write protection',
-            EVMError::DeployError(error_message) => error_message,
+            EVMError::Collision => 'create collision'.into(),
             EVMError::OutOfGas => 'out of gas'.into(),
             EVMError::Assertion => 'assertion failed'.into(),
             EVMError::DepthLimit => 'max call depth exceeded'.into(),

crates/evm/src/interpreter.cairo

@@ -20,8 +20,8 @@ use evm::instructions::{
 use evm::model::account::{Account, AccountTrait};
 use evm::model::vm::{VM, VMTrait};
 use evm::model::{
-    Message, Environment, Transfer, ExecutionSummary, ExecutionSummaryTrait, ExecutionResult,
-    ExecutionResultTrait, ExecutionResultStatus, AddressTrait, TransactionResult, Address
+    Message, Environment, Transfer, ExecutionSummary, ExecutionResult, ExecutionResultTrait,
+    ExecutionResultStatus, AddressTrait, TransactionResult, Address
 };
 use evm::precompiles::Precompiles;
 use evm::precompiles::eth_precompile_addresses;
@@ -170,7 +170,7 @@ pub impl EVMImpl of EVMTrait {
         // };
 
         TransactionResult {
-            success: summary.is_success(),
+            success: summary.status == ExecutionResultStatus::Success,
             return_data: summary.return_data,
             gas_used: total_gas_used,
             state: summary.state,
@@ -185,9 +185,13 @@ pub impl EVMImpl of EVMTrait {
         let result = if is_deploy_tx {
             // Check collision
             if target_account.has_code_or_nonce() {
-                return ExecutionSummaryTrait::exceptional_failure(
-                    EVMError::DeployError(CONTRACT_ACCOUNT_EXISTS).to_bytes(),
-                );
+                return ExecutionSummary {
+                    status: ExecutionResultStatus::Exception,
+                    return_data: EVMError::Collision.to_bytes(),
+                    gas_left: 0,
+                    state: env.state,
+                    gas_refund: 0
+                };
             }
 
             let mut result = Self::process_create_message(message, ref env);

crates/evm/src/model.cairo

@@ -108,30 +108,6 @@ pub struct ExecutionSummary {
     pub gas_refund: u64
 }
 
-#[generate_trait]
-pub impl ExecutionSummaryImpl of ExecutionSummaryTrait {
-    fn exceptional_failure(error: Span<u8>) -> ExecutionSummary {
-        ExecutionSummary {
-            status: ExecutionResultStatus::Exception,
-            return_data: error,
-            gas_left: 0,
-            state: Default::default(),
-            gas_refund: 0
-        }
-    }
-
-    fn is_success(self: @ExecutionSummary) -> bool {
-        *self.status == ExecutionResultStatus::Success
-    }
-
-    fn is_exception(self: @ExecutionSummary) -> bool {
-        *self.status == ExecutionResultStatus::Exception
-    }
-
-    fn is_revert(self: @ExecutionSummary) -> bool {
-        *self.status == ExecutionResultStatus::Revert
-    }
-}
 
 pub struct TransactionResult {
     pub success: bool,