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-rwxr-xr-xcontrib/zmq/zmq_sub3.4.py71
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diff --git a/contrib/zmq/zmq_sub3.4.py b/contrib/zmq/zmq_sub3.4.py
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+#!/usr/bin/env python3
+# Copyright (c) 2014-2016 The Bitcoin Core developers
+# Distributed under the MIT software license, see the accompanying
+# file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+# A blocking example using python 2.7 can be obtained from the git history:
+# https://github.com/bitcoin/bitcoin/blob/37a7fe9e440b83e2364d5498931253937abe9294/contrib/zmq/zmq_sub.py
+
+import array
+import binascii
+import asyncio, zmq, zmq.asyncio
+import signal
+import struct
+import sys
+
+if not (sys.version_info.major >= 3 and sys.version_info.minor >= 4):
+ print("This example only works with Python 3.4 and greater")
+ exit(1)
+
+port = 28332
+
+class ZMQHandler():
+ def __init__(self):
+ self.loop = zmq.asyncio.install()
+ self.zmqContext = zmq.asyncio.Context()
+
+ self.zmqSubSocket = self.zmqContext.socket(zmq.SUB)
+ self.zmqSubSocket.setsockopt_string(zmq.SUBSCRIBE, "hashblock")
+ self.zmqSubSocket.setsockopt_string(zmq.SUBSCRIBE, "hashtx")
+ self.zmqSubSocket.setsockopt_string(zmq.SUBSCRIBE, "rawblock")
+ self.zmqSubSocket.setsockopt_string(zmq.SUBSCRIBE, "rawtx")
+ self.zmqSubSocket.connect("tcp://127.0.0.1:%i" % port)
+
+ @asyncio.coroutine
+ def handle(self) :
+ msg = yield from self.zmqSubSocket.recv_multipart()
+ topic = msg[0]
+ body = msg[1]
+ sequence = "Unknown";
+ if len(msg[-1]) == 4:
+ msgSequence = struct.unpack('<I', msg[-1])[-1]
+ sequence = str(msgSequence)
+ if topic == b"hashblock":
+ print('- HASH BLOCK ('+sequence+') -')
+ print(binascii.hexlify(body))
+ elif topic == b"hashtx":
+ print('- HASH TX ('+sequence+') -')
+ print(binascii.hexlify(body))
+ elif topic == b"rawblock":
+ print('- RAW BLOCK HEADER ('+sequence+') -')
+ print(binascii.hexlify(body[:80]))
+ elif topic == b"rawtx":
+ print('- RAW TX ('+sequence+') -')
+ print(binascii.hexlify(body))
+ # schedule ourselves to receive the next message
+ asyncio.ensure_future(self.handle())
+
+ def start(self):
+ asyncio.ensure_future(self.handle())
+ self.loop.run_forever()
+
+ def stop(self):
+ self.loop.stop()
+ self.zmqContext.destroy()
+
+daemon = ZMQHandler()
+def signal_handler(num, frame):
+ daemon.stop()
+ exit(0)
+signal.signal(signal.SIGINT, signal_handler)
+daemon.start()