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72 lines
2.4 KiB
Python
72 lines
2.4 KiB
Python
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#!/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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