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mempool_resurrect.py
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#!/usr/bin/env python3
# Copyright (c) 2014-2019 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 resurrection of mined transactions when the blockchain is re-organized."""
from test_framework.test_framework import BitcoinTestFramework
from test_framework.blocktools import create_raw_transaction
from test_framework.util import assert_equal
class MempoolCoinbaseTest(BitcoinTestFramework):
def set_test_params(self):
self.num_nodes = 1
def skip_test_if_missing_module(self):
self.skip_if_no_wallet()
def run_test(self):
node0_address = self.nodes[0].getnewaddress()
# Spend block 1/2/3's coinbase transactions
# Mine a block.
# Create three more transactions, spending the spends
# Mine another block.
# ... make sure all the transactions are confirmed
# Invalidate both blocks
# ... make sure all the transactions are put back in the mempool
# Mine a new block
# ... make sure all the transactions are confirmed again.
b = [self.nodes[0].getblockhash(n) for n in range(1, 4)]
coinbase_txids = [self.nodes[0].getblock(h)['tx'][0] for h in b]
spends1_raw = [create_raw_transaction(self.nodes[0], txid, node0_address, amount=49.99)
for txid in coinbase_txids]
spends1_id = [self.nodes[0].sendrawtransaction(tx)
for tx in spends1_raw]
blocks = []
blocks.extend(self.nodes[0].generate(1))
spends2_raw = [create_raw_transaction(self.nodes[0], txid, node0_address, amount=49.98)
for txid in spends1_id]
spends2_id = [self.nodes[0].sendrawtransaction(tx)
for tx in spends2_raw]
blocks.extend(self.nodes[0].generate(1))
# mempool should be empty, all txns confirmed
assert_equal(set(self.nodes[0].getrawmempool()), set())
for txid in spends1_id + spends2_id:
tx = self.nodes[0].gettransaction(txid)
assert tx["confirmations"] > 0
# Use invalidateblock to re-org back
for node in self.nodes:
node.invalidateblock(blocks[0])
# All txns should be back in mempool with 0 confirmations
assert_equal(
set(self.nodes[0].getrawmempool()), set(spends1_id + spends2_id))
for txid in spends1_id + spends2_id:
tx = self.nodes[0].gettransaction(txid)
assert tx["confirmations"] == 0
# Generate another block, they should all get mined
self.nodes[0].generate(1)
# mempool should be empty, all txns confirmed
assert_equal(set(self.nodes[0].getrawmempool()), set())
for txid in spends1_id + spends2_id:
tx = self.nodes[0].gettransaction(txid)
assert tx["confirmations"] > 0
if __name__ == '__main__':
MempoolCoinbaseTest().main()

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