#! /usr/bin/env python3

import base64, socket, sys

def get_transaction(s, i):
    request = b"\0\0\0\0\x05" + i.to_bytes(2, "big")
    for _ in range(10):
        s.sendto(request, ("::1", 62039))
        try:
            while True:
                msg, sender = s.recvfrom(4096)
                if sender[0:2] == ("::1", 62039) and len(msg) == 156 and msg[0:5] == b"\0\0\0\0\x06" and msg[5:7] == i.to_bytes(2, "big"):
                    return msg[7:156]
        except TimeoutError:
            pass
    return None

def format_addr(raw_addr):
    return base64.b64encode(raw_addr).decode()

def format_amount(raw_amount):
    int_amount = int.from_bytes(raw_amount, "big")
    coins = int_amount // 100
    cents = int_amount % 100
    return f"{coins},{cents:02} cc"

def main():
    s = socket.socket(socket.AF_INET6, socket.SOCK_DGRAM)
    s.settimeout(1)
    for i in range(1024):
        transaction = get_transaction(s, i)
        if transaction is None:
            print("- no response from local node -", file=sys.stderr)
            exit(1)
        if transaction == 149 * b"\0":
            return
        if transaction[0] == 1:
            sender = format_addr(transaction[5:37])
            receiver = format_addr(transaction[37:69])
            amount = format_amount(transaction[69:77])
            fee = format_amount(transaction[77:85])
        elif transaction[0] == 2:
            sender = format_addr(transaction[5:37])
            receiver = "(gambling)" + 33 * " "
            amount = format_amount(transaction[37:45])
            fee = format_amount(transaction[45:53])
        elif transaction[0] == 3:
            print("- reveal transaction -")
            sender = None
        else:
            sender = None
        if sender is not None:
            print(f"{sender}   {receiver}   {amount:>13} {fee:>10}")

if __name__ == '__main__':
    main()