pyWalletConnect basic demo

pyWCdemo.py

import platform
import signal
from logging import basicConfig, DEBUG
from threading import Event

from pywalletconnect.client import WCClient

# Enable for debug output
basicConfig(level=DEBUG)


# pyWalletConnect Basic Dapp demo, using the Ethereum Goerli network
# WC v1 at https://example.walletconnect.org/
# WC v2 at https://react-app.walletconnect.com/


def WCCLIdemo():
    print(" ")
    print(" pyWalletConnect minimal demo - Goerli chain")
    uri = input("Paste a Dapp WC URI (v1/v2) >")

    # Seed mnemonic
    # chat network pigeon used gadget wrestle pizza invite stuff rose tree kingdom
    wallet_address = "0xC17B46133c4589C0a01Bec34FA3515fC8b021f5C"
    wallet_chain_id = 5  # Goerli

    # Required for v2
    WCClient.set_project_id("XXYOURWCPROJECTIDXX")
    # Optional
    WCClient.set_origin("https://thisgist.net")

    wclient = WCClient.from_wc_uri(uri)

    print("Connecting to the Dapp ...")

    session_data = wclient.open_session()

    # Waiting for user accept the Dapp request
    user_ok = input(
        f"WalletConnect pairing request from {session_data[2]['name']}. Approve? [y/N]>"
    )
    if user_ok.lower() != "y":
        print("User denied the pairing.")
        wclient.reject_session_request(session_data[0])
        return

    print("Accepted, continue connecting with the Dapp ...")
    wclient.reply_session_request(session_data[0], wallet_chain_id, wallet_address)

    print("Connected.")
    print(" To quit : Hit CTRL+C, or disconnect from Dapp.")
    print("Now waiting for dapp messages ...")
    
    while not evt_quit.is_set():
        # Better to use a timer to call this loop in a function

        # get_message return : (id, method, params) or (None, "", [])
        id_request, method, parameters = wclient.get_message()
        
        if id_request is not None:

            # Detect quit
            #  v1 disconnect
            if (method == "wc_sessionUpdate" and parameters[0]["approved"] == False):
                print("User disconnects from Dapp (WC v1).")
                break

            #  v2 disconnect
            if method == "wc_sessionDelete" and parameters.get("message"):
                print("User disconnects from Dapp (WC v2).")
                print("Reason :", parameters["message"])
                break
            
            if method == "wc_sessionRequest" or method == "wc_sessionPayload":

                print("\n <---- Received WalletConnect wallet query :")

                # Read if v2 and convert to v1 format
                if parameters.get("request"):
                    method = parameters["request"].get("method")
                    parameters = parameters["request"].get("params")

                print("Request received :", method, parameters)

                if "personal_sign" == method:
                    print("PERSONAL_SIGN request")
                    approve_ask = input(f"Approve {parameters} ?\n (y/N) >")
                    if approve_ask.lower() == 'y':
                        result = "12345678"  # Dummy data, could be : process_sign(parameters)
                        wclient.reply(id_request, result)
                    else:
                        wclient.reject(id_request)
                
                # elif method == ...
                #  do that ...

        evt_quit.wait(2)

    wclient.close()
    print("WC disconnected.")


def quit_handler(signo, _frame):
    print("Demo interrupted.")
    evt_quit.set()


evt_quit = Event()


if __name__ == "__main__":
    signal.signal(signal.SIGTERM, quit_handler)
    if platform.system() == "Linux":
        signal.signal(signal.SIGHUP, quit_handler)
    signal.signal(signal.SIGINT, quit_handler)
    signal.signal(signal.SIGBREAK, quit_handler)

    WCCLIdemo()