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71 lines
2.4 KiB
71 lines
2.4 KiB
#!/usr/bin/env python3 |
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# Copyright (c) 2014-2016 The Bitcoin Core developers |
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# Distributed under the MIT software license, see the accompanying |
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# file COPYING or http://www.opensource.org/licenses/mit-license.php. |
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# A blocking example using python 2.7 can be obtained from the git history: |
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# https://github.com/bitcoin/bitcoin/blob/37a7fe9e440b83e2364d5498931253937abe9294/contrib/zmq/zmq_sub.py |
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import array |
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import binascii |
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import asyncio, zmq, zmq.asyncio |
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import signal |
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import struct |
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import sys |
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if not (sys.version_info.major >= 3 and sys.version_info.minor >= 4): |
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print("This example only works with Python 3.4 and greater") |
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exit(1) |
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port = 28332 |
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class ZMQHandler(): |
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def __init__(self): |
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self.loop = zmq.asyncio.install() |
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self.zmqContext = zmq.asyncio.Context() |
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self.zmqSubSocket = self.zmqContext.socket(zmq.SUB) |
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self.zmqSubSocket.setsockopt_string(zmq.SUBSCRIBE, "hashblock") |
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self.zmqSubSocket.setsockopt_string(zmq.SUBSCRIBE, "hashtx") |
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self.zmqSubSocket.setsockopt_string(zmq.SUBSCRIBE, "rawblock") |
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self.zmqSubSocket.setsockopt_string(zmq.SUBSCRIBE, "rawtx") |
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self.zmqSubSocket.connect("tcp://127.0.0.1:%i" % port) |
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@asyncio.coroutine |
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def handle(self) : |
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msg = yield from self.zmqSubSocket.recv_multipart() |
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topic = msg[0] |
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body = msg[1] |
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sequence = "Unknown"; |
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if len(msg[-1]) == 4: |
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msgSequence = struct.unpack('<I', msg[-1])[-1] |
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sequence = str(msgSequence) |
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if topic == b"hashblock": |
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print('- HASH BLOCK ('+sequence+') -') |
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print(binascii.hexlify(body)) |
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elif topic == b"hashtx": |
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print('- HASH TX ('+sequence+') -') |
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print(binascii.hexlify(body)) |
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elif topic == b"rawblock": |
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print('- RAW BLOCK HEADER ('+sequence+') -') |
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print(binascii.hexlify(body[:80])) |
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elif topic == b"rawtx": |
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print('- RAW TX ('+sequence+') -') |
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print(binascii.hexlify(body)) |
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# schedule ourselves to receive the next message |
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asyncio.ensure_future(self.handle()) |
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def start(self): |
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asyncio.ensure_future(self.handle()) |
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self.loop.run_forever() |
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def stop(self): |
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self.loop.stop() |
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self.zmqContext.destroy() |
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daemon = ZMQHandler() |
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def signal_handler(num, frame): |
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daemon.stop() |
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exit(0) |
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signal.signal(signal.SIGINT, signal_handler) |
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daemon.start()
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