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#!/usr/bin/env python3
# Copyright (c) 2015-2018 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
"""Test the ZMQ notification interface."""
import struct
from test_framework.address import ADDRESS_BCRT1_UNSPENDABLE
from test_framework.test_framework import BitcoinTestFramework
from test_framework.messages import CTransaction
from test_framework.util import (
assert_equal,
bytes_to_hex_str,
hash256,
)
from io import BytesIO
class ZMQSubscriber:
def __init__(self, socket, topic):
self.sequence = 0
self.socket = socket
self.topic = topic
import zmq
self.socket.setsockopt(zmq.SUBSCRIBE, self.topic)
def receive(self):
topic, body, seq = self.socket.recv_multipart()
# Topic should match the subscriber topic.
assert_equal(topic, self.topic)
# Sequence should be incremental.
assert_equal(struct.unpack('<I', seq)[-1], self.sequence)
self.sequence += 1
return body
class ZMQTest (BitcoinTestFramework):
def set_test_params(self):
self.num_nodes = 2
def skip_test_if_missing_module(self):
self.skip_if_no_py3_zmq()
self.skip_if_no_bitcoind_zmq()
def setup_nodes(self):
import zmq
# Initialize ZMQ context and socket.
# All messages are received in the same socket which means
# that this test fails if the publishing order changes.
# Note that the publishing order is not defined in the documentation and
# is subject to change.
address = "tcp://127.0.0.1:28332"
self.zmq_context = zmq.Context()
socket = self.zmq_context.socket(zmq.SUB)
socket.set(zmq.RCVTIMEO, 60000)
socket.connect(address)
# Subscribe to all available topics.
self.hashblock = ZMQSubscriber(socket, b"hashblock")
self.hashtx = ZMQSubscriber(socket, b"hashtx")
self.rawblock = ZMQSubscriber(socket, b"rawblock")
self.rawtx = ZMQSubscriber(socket, b"rawtx")
self.extra_args = [
["-zmqpub%s=%s" % (sub.topic.decode(), address) for sub in [self.hashblock, self.hashtx, self.rawblock, self.rawtx]],
[],
]
self.add_nodes(self.num_nodes, self.extra_args)
self.start_nodes()
def run_test(self):
try:
self._zmq_test()
finally:
# Destroy the ZMQ context.
self.log.debug("Destroying ZMQ context")
self.zmq_context.destroy(linger=None)
def _zmq_test(self):
num_blocks = 5
self.log.info("Generate %(n)d blocks (and %(n)d coinbase txes)" % {"n": num_blocks})
genhashes = self.nodes[0].generatetoaddress(num_blocks, ADDRESS_BCRT1_UNSPENDABLE)
self.sync_all()
for x in range(num_blocks):
# Should receive the coinbase txid.
txid = self.hashtx.receive()
# Should receive the coinbase raw transaction.
hex = self.rawtx.receive()
tx = CTransaction()
tx.deserialize(BytesIO(hex))
tx.calc_sha256()
assert_equal(tx.hash, bytes_to_hex_str(txid))
# Should receive the generated block hash.
hash = bytes_to_hex_str(self.hashblock.receive())
assert_equal(genhashes[x], hash)
# The block should only have the coinbase txid.
assert_equal([bytes_to_hex_str(txid)], self.nodes[1].getblock(hash)["tx"])
# Should receive the generated raw block.
block = self.rawblock.receive()
assert_equal(genhashes[x], bytes_to_hex_str(hash256(block[:80])))
if self.is_wallet_compiled():
self.log.info("Wait for tx from second node")
payment_txid = self.nodes[1].sendtoaddress(self.nodes[0].getnewaddress(), 1.0)
self.sync_all()
# Should receive the broadcasted txid.
txid = self.hashtx.receive()
assert_equal(payment_txid, bytes_to_hex_str(txid))
# Should receive the broadcasted raw transaction.
hex = self.rawtx.receive()
assert_equal(payment_txid, bytes_to_hex_str(hash256(hex)))
if __name__ == '__main__':
ZMQTest().main()
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