Script for generating XID passwords on EVM chains like Polygon

xid-polygon-password.py

#!/usr/bin/env python3

# Copyright (C) 2022 The Xaya developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.

"""
CLI script to generate a XID password for a Polygon (or other EVM)
Xaya identity.
"""

import base64
import codecs
import jsonrpclib
import os

from eth_account import Account, messages
from web3 import Web3

w3 = Web3 (Web3.HTTPProvider ("https://polygon-rpc.com"))

xid = jsonrpclib.ServerProxy ("https://xid.xaya.io/polygon/rpc")
name = "domob"
app = "polygon.xaya.io"

key = os.getenv ("PRIVKEY")
acc = Account.from_key (key)
addr = acc.address
print ("Own address: %s" % addr)

data = xid.getnamestate (name=name)["data"]
found = False
for s in data["signers"]:
  # We only look for global signers for simplicity.
  if len (s) > 1 or "addresses" not in s:
    continue
  if addr in s["addresses"]:
    found = True
assert found, "own address is not a signer"

msg = xid.getauthmessage (name=name, application=app, data={})

fullMsg = "Xaya signature for chain %d:\n\n%s" \
    % (w3.eth.chainId, msg["authmessage"])
encoded = messages.encode_defunct (text=fullMsg)
signed = acc.sign_message (encoded)
sgn = codecs.decode (base64.b64encode (signed.signature), "ascii")

fullPwd = xid.setauthsignature (password=msg["password"], signature=sgn)
print ("Password:\n%s" % fullPwd)

verify = xid.verifyauth (name=name, application=app, password=fullPwd)
print (verify["data"])