use fallback ERC-20 ABI

main.py

@@ -11,7 +11,8 @@ from util import load_config
 
 
 def init_logger():
-    logger.add(sys.stdout, level="DEBUG")
+    logger.remove()
+    logger.add(sys.stdout, level="INFO")
 
 
 async def main():
@@ -47,4 +48,5 @@ async def main():
 
 
 if __name__ == '__main__':
+    init_logger()
     asyncio.get_event_loop().run_until_complete(main())

util.py

@@ -4,6 +4,36 @@ from loguru import logger
 from typing import Any, Optional, Dict
 from web3.types import ChecksumAddress
 
+STANDARD_ERC20_ABI = [
+    {
+        "constant": True,
+        "inputs": [],
+        "name": "name",
+        "outputs": [{"name": "", "type": "string"}],
+        "payable": False,
+        "stateMutability": "view",
+        "type": "function",
+    },
+    {
+        "constant": True,
+        "inputs": [],
+        "name": "symbol",
+        "outputs": [{"name": "", "type": "string"}],
+        "payable": False,
+        "stateMutability": "view",
+        "type": "function",
+    },
+    {
+        "constant": True,
+        "inputs": [],
+        "name": "totalSupply",
+        "outputs": [{"name": "", "type": "uint256"}],
+        "payable": False,
+        "stateMutability": "view",
+        "type": "function",
+    }
+]
+
 
 def fetch_abi(address: ChecksumAddress, headers: Optional[Dict[str, Any]] = None,
               params: Optional[Dict[str, Any]] = None, key: Optional[str] = None) -> Optional[Dict[str, Any]]:
@@ -15,7 +45,8 @@ def fetch_abi(address: ChecksumAddress, headers: Optional[Dict[str, Any]] = None
     # Check for error in the response
     if data['status'] == '0':
         logger.error(f"Error fetching ABI: {data.get('result')}")
-        return None
+        logger.warning(f"Using fallback ABI.")
+        return STANDARD_ERC20_ABI
 
     return json.loads(data['result'])