start erc-20 sandbox stuff

contract-monitoring/main.py

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+"""
+ERC-20 monitoring sandbox
+
+An exercise exploring ABIs and chain events
+"""
+import requests
+from typing import Any, Optional, Dict
+
+JENNER_ADDRESS = '0x482702745260ffd69fc19943f70cffe2cacd70e9'
+
+
+def fetch_abi(
+        address: str,
+        headers: Optional[Dict[str, Any]] = None,
+        params: Optional[Dict[str, Any]] = None
+) -> Optional[Dict[str, Any]]:
+    # TODO: Ensure it is a well-formed address
+    # TODO: Check for errors, such as a "status" key set to 0
+    url = f'https://api.etherscan.io/api?module=contract&action=getabi&address={address}'
+    try:
+        response = requests.get(url, headers=headers, params=params)
+        response.raise_for_status()
+        return response.json()
+    except requests.exceptions.RequestException as err:
+        print(f'Error during the request: {err}')
+        return None
+    except ValueError as err:
+        print(f'Error parsing JSON: {err}')
+
+
+def main():
+    jenner_abi = fetch_abi(JENNER_ADDRESS)
+    print(jenner_abi)
+
+
+if __name__ == '__main__':
+    main()

contract-monitoring/requirements.txt

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+requests
+loguru
+web3