check length in checksum validation

Author: msamsami

validators/crypto_addresses/eth_address.py

@@ -15,6 +15,9 @@ def _validate_eth_checksum_address(addr: str):
     addr = addr.replace("0x", "")
     addr_hash = keccak_256(addr.lower().encode("ascii")).hexdigest()
 
+    if len(addr) != 40:
+        return False
+
     for i in range(0, 40):
         if ((int(addr_hash[i], 16) > 7 and addr[i].upper() != addr[i]) or
                 (int(addr_hash[i], 16) <= 7 and addr[i].lower() != addr[i])):