def process_transaction(bitcoin_rpc, redis, transaction, min_confirmations=5):
log.debug("Processing transaction: %s", transaction['txid'])
receive_details = next(d for d in transaction['details'] if d['category'] == u'receive')
address = receive_details['address']
amount = receive_details['amount']
is_confirmed = int(transaction['confirmations']) >= min_confirmations
key = KEY_PREFIX_PENDING_WALLET(address)
value = redis.get(key)
if not value:
# Wallet is discarded.
return
payout_address, callback_url = json.loads(value)
if is_confirmed and payout_address:
# FIXME: Is bitcoind ready to sendtoaddress at this point?
# TODO: Log receipt.
# TODO: Take fee.
bitcoin_rpc.sendtoaddress(payout_address, amount)
if callback_url:
transaction_str = json.dumps(transaction)
payload = {
# TODO: Add nonce and signing?
'state': 'confirmed' if is_confirmed else 'unconfirmed',
'transaction': transaction_str,
}
process_callback(redis, callback_url, payload)
return transaction
def deque_callback(redis):
value = redis.rpop(KEY_CALLBACK_QUEUE)
if not value:
return
r = json.loads(value)
seconds_wait = _get_retry_wait(r['num_attempts'])
if r['time_attempted'] + seconds_wait < time.time():
# Too soon
redis.lpush(value)
return
return process_callback(r['callback_url'], r['payload'], r['num_attempts'])
def deque_transaction(bitcoin_rpc, redis, seconds_expire=60*60*24, min_confirmations=5):
value = redis.rpop(KEY_CONFIRMATION_QUEUE)
if not value:
# Nothing to do.
return
transaction = json.loads(value)
# Refresh
if isinstance(transaction, list):
# FIXME: Backwards compat with old format, remove this soon.
transaction = bitcoin_rpc.gettransaction(transaction[0]).__dict__
else:
transaction = bitcoin_rpc.gettransaction(transaction['txid']).__dict__
if int(transaction['timereceived']) + seconds_expire < time.time():
# TODO: Log expired transaction.
return
if int(transaction['confirmations']) < min_confirmations:
# Not ready yet
redis.lpush(KEY_CONFIRMATION_QUEUE, value)
return
return process_transaction(bitcoin_rpc, redis, transaction, min_confirmations)
