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#!/usr/bin/env python3
# Copyright (C) 2013-2014 The python-bitcoinlib developers
#
# This file is part of python-bitcoinlib.
#
# It is subject to the license terms in the LICENSE file found in the top-level
# directory of this distribution.
#
# No part of python-bitcoinlib, including this file, may be copied, modified,
# propagated, or distributed except according to the terms contained in the
# LICENSE file.
"""Bip-0070-related functionality
Creates http response objects suitable for use with
bitcoin bip 70 using googles protocol buffers.
"""
import urllib2
# https://github.com/bitcoin/bips/blob/master/bip-0070/paymentrequest.proto
import payments_pb2
o = payments_pb2
import bitcoin
#bitcoin.SelectParams('testnet')
from bitcoin.wallet import CBitcoinAddress
from bitcoin.core.script import CScript
from bitcoin.rpc import Proxy
from time import time
def payment_request():
"""Generates a http PaymentRequest object"""
bc = Proxy()
btc = bc.getnewaddress()
# Setting the 'amount' field to 0 (zero) should prompt the user to enter
# the amount for us but a bug in bitcoin core qt version 0.9.1 (at time of
# writing) wrongly informs us that the value is too small and aborts.
# https://github.com/bitcoin/bitcoin/issues/3095
# Also there can be no leading 0's (zeros).
btc_amount = 100000
serialized_pubkey = btc.to_scriptPubKey()
pdo = o.PaymentDetails()
#pdo.network = 'test'
pdo.outputs.add(amount = btc_amount,script = serialized_pubkey)
pdo.time = int(time())
pdo.memo = 'String shown to user before confirming payment'
pdo.payment_url = 'http://payment_ack.url'
pro = o.PaymentRequest()
pro.serialized_payment_details = pdo.SerializeToString()
sds_pr = pro.SerializeToString()
open('sds_pr_blob', 'wb').write(sds_pr)
headers = {'Content-Type': 'application/bitcoin-payment',
'Accept': 'application/bitcoin-paymentrequest'}
http_response_object = urllib2.Request('file:sds_pr_blob', None, headers)
return http_response_object
def payment_ack(serialized_Payment_message):
"""Generates a PaymentACK object, captures client refund address and returns a message"""
pao = o.PaymentACK()
pao.payment.ParseFromString(serialized_Payment_message)
pao.memo = 'String shown to user after payment confirmation'
refund_address = CBitcoinAddress.from_scriptPubKey(CScript(pao.payment.refund_to[0].script))
sds_pa = pao.SerializeToString()
open('sds_pa_blob', 'wb').write(sds_pa)
headers = {'Content-Type' : 'application/bitcoin-payment', 'Accept' : 'application/bitcoin-paymentack'}
http_response_object = urllib2.Request('file:sds_pa_blob', None, headers)
return http_response_object
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