+from eth_hash.auto import keccak
+
 def has_function(contract_addr: str, signature: str) -> bool:
     code = w3.eth.get_code(contract_addr).hex()
-    fn_hash = w3.keccak(signature.encode()).hex()
-    fn_hash = f"63{fn_hash[2:10]}"  # 0x63 is PUSH4
+    fn_hash = keccak(signature.encode()).hex()
+    fn_hash = f"63{fn_hash[:8]}"  # 0x63 is PUSH4
     return fn_hash in code

- Avant : 0,0677 sec
- Après : 0,0256 sec (- 62,2 %)