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#!/usr/bin/env python3
# Copyright (c) 2014-2021 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
"""Test longpolling with getblocktemplate."""
import random
import threading
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import get_rpc_proxy
from test_framework.wallet import MiniWallet
class LongpollThread(threading.Thread):
def __init__(self, node):
threading.Thread.__init__(self)
# query current longpollid
template = node.getblocktemplate({'rules': ['segwit']})
self.longpollid = template['longpollid']
# create a new connection to the node, we can't use the same
# connection from two threads
self.node = get_rpc_proxy(node.url, 1, timeout=600, coveragedir=node.coverage_dir)
def run(self):
self.node.getblocktemplate({'longpollid': self.longpollid, 'rules': ['segwit']})
class GetBlockTemplateLPTest(BitcoinTestFramework):
def set_test_params(self):
self.num_nodes = 2
self.supports_cli = False
def run_test(self):
self.log.info("Warning: this test will take about 70 seconds in the best case. Be patient.")
self.log.info("Test that longpollid doesn't change between successive getblocktemplate() invocations if nothing else happens")
self.generate(self.nodes[0], 10)
template = self.nodes[0].getblocktemplate({'rules': ['segwit']})
longpollid = template['longpollid']
template2 = self.nodes[0].getblocktemplate({'rules': ['segwit']})
assert template2['longpollid'] == longpollid
self.log.info("Test that longpoll waits if we do nothing")
thr = LongpollThread(self.nodes[0])
with self.nodes[0].assert_debug_log(["ThreadRPCServer method=getblocktemplate"], timeout=3):
thr.start()
# check that thread still lives
thr.join(5) # wait 5 seconds or until thread exits
assert thr.is_alive()
self.miniwallet = MiniWallet(self.nodes[0])
self.log.info("Test that longpoll will terminate if another node generates a block")
self.generate(self.nodes[1], 1) # generate a block on another node
# check that thread will exit now that new transaction entered mempool
thr.join(5) # wait 5 seconds or until thread exits
assert not thr.is_alive()
self.log.info("Test that longpoll will terminate if we generate a block ourselves")
thr = LongpollThread(self.nodes[0])
with self.nodes[0].assert_debug_log(["ThreadRPCServer method=getblocktemplate"], timeout=3):
thr.start()
self.generate(self.nodes[0], 1) # generate a block on own node
thr.join(5) # wait 5 seconds or until thread exits
assert not thr.is_alive()
self.log.info("Test that introducing a new transaction into the mempool will terminate the longpoll")
thr = LongpollThread(self.nodes[0])
with self.nodes[0].assert_debug_log(["ThreadRPCServer method=getblocktemplate"], timeout=3):
thr.start()
# generate a transaction and submit it
self.miniwallet.send_self_transfer(from_node=random.choice(self.nodes))
# after one minute, every 10 seconds the mempool is probed, so in 80 seconds it should have returned
thr.join(60 + 20)
assert not thr.is_alive()
if __name__ == '__main__':
GetBlockTemplateLPTest(__file__).main()
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