eth-keyfile

import os import json from eth_keyfile import create_keyfile_json, decode_keyfile_json # 1. Generate a new private key (32 bytes) private_key = os.urandom(32) password = b"my_secure_password" # 2. Create a keyfile JSON object (default is V3) keyfile_json = create_keyfile_json(private_key, password) # You would typically save this to a file: # with open('my_keystore.json', 'w') as f: # json.dump(keyfile_json, f) print(f"Generated Keyfile (first 50 chars): {json.dumps(keyfile_json)[:50]}...") # 3. Decode the private key from the keyfile JSON decoded_private_key = decode_keyfile_json(keyfile_json, password) assert private_key == decoded_private_key print(f"Successfully decoded private key: {decoded_private_key.hex()}") # Example with Keyfile V4 (requires different private key range) # Note: private_key for v4 must be less than MAX_V4_PRIVATE_KEY # For simplicity, using a valid v3 key here, but in a real scenario, # ensure it's valid for bls12-381 curve if using v4. try: keyfile_json_v4 = create_keyfile_json( private_key, password, version=4, description="My V4 Key", path="m/123/456" ) print(f"\nGenerated V4 Keyfile (first 50 chars): {json.dumps(keyfile_json_v4)[:50]}...") decoded_private_key_v4 = decode_keyfile_json(keyfile_json_v4, password) assert private_key == decoded_private_key_v4 print(f"Successfully decoded V4 private key: {decoded_private_key_v4.hex()}") except Exception as e: print(f"\nCould not create V4 keyfile with this private key (expected for some randomly generated keys): {e}")