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37 lines
1.3 KiB
Python
37 lines
1.3 KiB
Python
import zmq
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import binascii
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from common.logger import Logger
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from pisa.conf import FEED_PROTOCOL, FEED_ADDR, FEED_PORT
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# ToDo: #7-add-async-back-to-zmq
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class ZMQSubscriber:
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""" Adapted from https://github.com/bitcoin/bitcoin/blob/master/contrib/zmq/zmq_sub.py"""
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def __init__(self, config, parent):
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self.zmqContext = zmq.Context()
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self.zmqSubSocket = self.zmqContext.socket(zmq.SUB)
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self.zmqSubSocket.setsockopt(zmq.RCVHWM, 0)
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self.zmqSubSocket.setsockopt_string(zmq.SUBSCRIBE, "hashblock")
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self.zmqSubSocket.connect(
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"%s://%s:%s" % (config.get("FEED_PROTOCOL"), config.get("FEED_ADDR"), config.get("FEED_PORT"))
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)
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self.logger = Logger("ZMQSubscriber-{}".format(parent))
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self.terminate = False
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def handle(self, block_queue):
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while not self.terminate:
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msg = self.zmqSubSocket.recv_multipart()
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# Terminate could have been set wile the thread was blocked in recv
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if not self.terminate:
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topic = msg[0]
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body = msg[1]
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if topic == b"hashblock":
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block_hash = binascii.hexlify(body).decode("utf-8")
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block_queue.put(block_hash)
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self.logger.info("New block received via ZMQ", block_hash=block_hash)
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