Use opcode number from ctx and remove useless code

scripts/utils/kakarot.py

@@ -279,8 +279,8 @@ async def get_eoa(private_key=None, amount=10) -> Account:
 
 async def eth_send_transaction(
     to: Union[int, str],
-    gas: int,
     data: Union[str, bytes],
+    gas: int = 21_000,
     value: Union[int, str] = 0,
     caller_eoa: Optional[Account] = None,
     max_fee: Optional[int] = None,

src/kakarot/errors.cairo

@@ -475,4 +475,28 @@ namespace Errors {
         dw 'o';
         dw 'n';
     }
+
+    func outOfGas() -> (error_len: felt, error: felt*) {
+        let (error) = get_label_location(oog_error_message);
+        return (17, error);
+
+        oog_error_message:
+        dw 'K';
+        dw 'a';
+        dw 'k';
+        dw 'a';
+        dw 'r';
+        dw 'o';
+        dw 't';
+        dw ':';
+        dw ' ';
+        dw 'o';
+        dw 'u';
+        dw 't';
+        dw 'O';
+        dw 'f';
+        dw 'G';
+        dw 'a';
+        dw 's';
+    }
 }

src/kakarot/evm.cairo

@@ -95,27 +95,27 @@ namespace EVM {
         jmp rel offset;
         call StopAndArithmeticOperations.exec_stop;  // 0x0
         ret;
-        call StopAndArithmeticOperations.exec_add;  // 0x1
+        call StopAndArithmeticOperations.exec_arithmetic_operation;  // 0x1
         ret;
-        call StopAndArithmeticOperations.exec_mul;  // 0x2
+        call StopAndArithmeticOperations.exec_arithmetic_operation;  // 0x2
         ret;
-        call StopAndArithmeticOperations.exec_sub;  // 0x3
+        call StopAndArithmeticOperations.exec_arithmetic_operation;  // 0x3
         ret;
-        call StopAndArithmeticOperations.exec_div;  // 0x4
+        call StopAndArithmeticOperations.exec_arithmetic_operation;  // 0x4
         ret;
-        call StopAndArithmeticOperations.exec_sdiv;  // 0x5
+        call StopAndArithmeticOperations.exec_arithmetic_operation;  // 0x5
         ret;
-        call StopAndArithmeticOperations.exec_mod;  // 0x6
+        call StopAndArithmeticOperations.exec_arithmetic_operation;  // 0x6
         ret;
-        call StopAndArithmeticOperations.exec_smod;  // 0x7
+        call StopAndArithmeticOperations.exec_arithmetic_operation;  // 0x7
         ret;
-        call StopAndArithmeticOperations.exec_addmod;  // 0x8
+        call StopAndArithmeticOperations.exec_arithmetic_operation;  // 0x8
         ret;
-        call StopAndArithmeticOperations.exec_mulmod;  // 0x9
+        call StopAndArithmeticOperations.exec_arithmetic_operation;  // 0x9
         ret;
-        call StopAndArithmeticOperations.exec_exp;  // 0xa
+        call StopAndArithmeticOperations.exec_arithmetic_operation;  // 0xa
         ret;
-        call StopAndArithmeticOperations.exec_signextend;  // 0xb
+        call StopAndArithmeticOperations.exec_arithmetic_operation;  // 0xb
         ret;
         call unknown_opcode;  // 0xc
         ret;