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#!/usr/bin/env python3
# Copyright (c) 2017-2021 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 that the mempool ensures transaction delivery by periodically sending
to peers until a GETDATA is received."""
import time
from test_framework.p2p import P2PTxInvStore
from test_framework.test_framework import BitcoinTestFramework
from test_framework.util import (
assert_equal,
create_confirmed_utxos,
)
MAX_INITIAL_BROADCAST_DELAY = 15 * 60 # 15 minutes in seconds
class MempoolUnbroadcastTest(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.test_broadcast()
self.test_txn_removal()
def test_broadcast(self):
self.log.info("Test that mempool reattempts delivery of locally submitted transaction")
node = self.nodes[0]
min_relay_fee = node.getnetworkinfo()["relayfee"]
utxos = create_confirmed_utxos(self, min_relay_fee, node, 10)
self.disconnect_nodes(0, 1)
self.log.info("Generate transactions that only node 0 knows about")
# generate a wallet txn
addr = node.getnewaddress()
wallet_tx_hsh = node.sendtoaddress(addr, 0.0001)
# generate a txn using sendrawtransaction
us0 = utxos.pop()
inputs = [{"txid": us0["txid"], "vout": us0["vout"]}]
outputs = {addr: 0.0001}
tx = node.createrawtransaction(inputs, outputs)
node.settxfee(min_relay_fee)
txF = node.fundrawtransaction(tx)
txFS = node.signrawtransactionwithwallet(txF["hex"])
rpc_tx_hsh = node.sendrawtransaction(txFS["hex"])
# check transactions are in unbroadcast using rpc
mempoolinfo = self.nodes[0].getmempoolinfo()
assert_equal(mempoolinfo['unbroadcastcount'], 2)
mempool = self.nodes[0].getrawmempool(True)
for tx in mempool:
assert_equal(mempool[tx]['unbroadcast'], True)
# check that second node doesn't have these two txns
mempool = self.nodes[1].getrawmempool()
assert rpc_tx_hsh not in mempool
assert wallet_tx_hsh not in mempool
# ensure that unbroadcast txs are persisted to mempool.dat
self.restart_node(0)
self.log.info("Reconnect nodes & check if they are sent to node 1")
self.connect_nodes(0, 1)
# fast forward into the future & ensure that the second node has the txns
node.mockscheduler(MAX_INITIAL_BROADCAST_DELAY)
self.sync_mempools(timeout=30)
mempool = self.nodes[1].getrawmempool()
assert rpc_tx_hsh in mempool
assert wallet_tx_hsh in mempool
# check that transactions are no longer in first node's unbroadcast set
mempool = self.nodes[0].getrawmempool(True)
for tx in mempool:
assert_equal(mempool[tx]['unbroadcast'], False)
self.log.info("Add another connection & ensure transactions aren't broadcast again")
conn = node.add_p2p_connection(P2PTxInvStore())
node.mockscheduler(MAX_INITIAL_BROADCAST_DELAY)
time.sleep(2) # allow sufficient time for possibility of broadcast
assert_equal(len(conn.get_invs()), 0)
self.disconnect_nodes(0, 1)
node.disconnect_p2ps()
self.log.info("Rebroadcast transaction and ensure it is not added to unbroadcast set when already in mempool")
rpc_tx_hsh = node.sendrawtransaction(txFS["hex"])
assert not node.getmempoolentry(rpc_tx_hsh)['unbroadcast']
def test_txn_removal(self):
self.log.info("Test that transactions removed from mempool are removed from unbroadcast set")
node = self.nodes[0]
# since the node doesn't have any connections, it will not receive
# any GETDATAs & thus the transaction will remain in the unbroadcast set.
addr = node.getnewaddress()
txhsh = node.sendtoaddress(addr, 0.0001)
# check transaction was removed from unbroadcast set due to presence in
# a block
removal_reason = "Removed {} from set of unbroadcast txns before confirmation that txn was sent out".format(txhsh)
with node.assert_debug_log([removal_reason]):
self.generate(node, 1, sync_fun=self.no_op)
if __name__ == "__main__":
MempoolUnbroadcastTest().main()
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