def is_broadcast(self):
""" Returns True if this Request can be successfully retrieved from the blockchain.
"""
from request_network.api import RequestNetwork
request_api = RequestNetwork()
try:
request = request_api.get_request_by_transaction_hash(self.transaction_hash)
except RequestNotFound:
return False
# TODO validate other parameters? Hash the Request and compare hashes?
return request.id == self.id
def setUp(self):
super().setUp()
self.request_api = RequestNetwork()
def setUp(self):
super().setUp()
self.request_api = RequestNetwork()
self.service = RequestERC20Service(
token_address=test_token_address
)
def main():
parser = argparse.ArgumentParser(
description=
'Create a signed Request and save it as a QR code in a PNG image.')
parser.add_argument('--payee',
type=str,
required=True,
help='Ethereum address which will receive the payment')
parser.add_argument('--amount',
type=float,
required=True,
help='The payment amount in ETH')
parser.add_argument('--output-file',
type=str,
required=True,
help='Output filename')
parser.add_argument('--callback-url',
type=str,
required=True,
help='Callback URL')
parser.add_argument(
'--network-id',
type=str,
required=True,
help='Ethereum network ID, e.g. 1 for "main" or 4 for "rinkeby"')
parser.add_argument(
'--expiration',
type=int,
default=3600,
help='The number of seconds after which this Request expires')
args = parser.parse_args()
if os.path.exists(args.output_file):
raise Exception('{} already exists'.format(args.output_file))
expiration_timestamp = int(
time.time()) + (args.expiration if args.expiration else 3600)
# Use format to get a string instead of a number in scientific notation
amount_in_wei = format(args.amount * (10**18), '.0f')
payee = Payee(id_address=Web3.toChecksumAddress(args.payee),
amount=amount_in_wei,
payment_address=None)
print('Generating signed Request and QR code')
print('Payee: {}'.format(payee.id_address))
print('Amount: {} ETH ({} Wei)'.format(args.amount, amount_in_wei))
print('Expiration: {}'.format(
datetime.datetime.fromtimestamp(expiration_timestamp).strftime(
'%Y-%m-%d %H:%M:%S')))
print('Ethereum network name: ID: {}'.format(args.network_id))
print('Callback URL: {}'.format(args.callback_url))
request_api = RequestNetwork()
signed_request = request_api.create_signed_request(
role=Roles.PAYEE,
currency=currencies_by_symbol['ETH'],
payees=[payee],
expiration_date=expiration_timestamp)
with open(args.output_file, 'wb') as f:
signed_request.write_qr_code(f,
callback_url=args.callback_url,
ethereum_network_id=args.network_id)
print('QR code written to {}'.format(args.output_file))