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#!/usr/bin/env python3
# Copyright (c) 2014-2018 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."""
from decimal import Decimal
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import get_rpc_proxy, random_transaction
import threading
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
def skip_test_if_missing_module(self):
self.skip_if_no_wallet()
def run_test(self):
self.log.info("Warning: this test will take about 70 seconds in the best case. Be patient.")
self.nodes[0].generate(10)
template = self.nodes[0].getblocktemplate({'rules': ['segwit']})
longpollid = template['longpollid']
# longpollid should not change between successive invocations if nothing else happens
template2 = self.nodes[0].getblocktemplate({'rules': ['segwit']})
assert template2['longpollid'] == longpollid
# Test 1: test that the longpolling wait if we do nothing
thr = LongpollThread(self.nodes[0])
thr.start()
# check that thread still lives
thr.join(5) # wait 5 seconds or until thread exits
assert thr.is_alive()
# Test 2: test that longpoll will terminate if another node generates a block
self.nodes[1].generate(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()
# Test 3: test that longpoll will terminate if we generate a block ourselves
thr = LongpollThread(self.nodes[0])
thr.start()
self.nodes[0].generate(1) # generate a block on another node
thr.join(5) # wait 5 seconds or until thread exits
assert not thr.is_alive()
# Test 4: test that introducing a new transaction into the mempool will terminate the longpoll
thr = LongpollThread(self.nodes[0])
thr.start()
# generate a random transaction and submit it
min_relay_fee = self.nodes[0].getnetworkinfo()["relayfee"]
# min_relay_fee is fee per 1000 bytes, which should be more than enough.
(txid, txhex, fee) = random_transaction(self.nodes, Decimal("1.1"), min_relay_fee, Decimal("0.001"), 20)
# 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().main()
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