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#!/usr/bin/env python
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# A simple script that connects to a server and displays block headers
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import time, electrum
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# 1. start the interface and wait for connection
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interface = electrum.Interface('ecdsa.net:50002:s')
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interface.start(wait = True)
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if not interface.is_connected:
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print "not connected"
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exit()
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# 2. send the subscription
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callback = lambda _,result: electrum.print_json(result.get('result'))
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interface.send([('blockchain.headers.subscribe',[])], callback)
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# 3. wait for results
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while interface.is_connected:
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time.sleep(1)
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