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#!/usr/bin/env python3
# Copyright (c) 2014-2020 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.util import assert_equal
from test_framework.wallet import MiniWallet
class MempoolCoinbaseTest(BitcoinTestFramework):
def set_test_params(self):
self.num_nodes = 1
self.setup_clean_chain = True
def run_test(self):
node = self.nodes[0]
wallet = MiniWallet(node)
# Add enough mature utxos to the wallet so that all txs spend confirmed coins
wallet.generate(3)
node.generate(100)
# 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
blocks = []
spends1_ids = [wallet.send_self_transfer(from_node=node)['txid'] for _ in range(3)]
blocks.extend(node.generate(1))
spends2_ids = [wallet.send_self_transfer(from_node=node)['txid'] for _ in range(3)]
blocks.extend(node.generate(1))
spends_ids = set(spends1_ids + spends2_ids)
# mempool should be empty, all txns confirmed
assert_equal(set(node.getrawmempool()), set())
confirmed_txns = set(node.getblock(blocks[0])['tx'] + node.getblock(blocks[1])['tx'])
# Checks that all spend txns are contained in the mined blocks
assert spends_ids < confirmed_txns
# Use invalidateblock to re-org back
node.invalidateblock(blocks[0])
# All txns should be back in mempool with 0 confirmations
assert_equal(set(node.getrawmempool()), spends_ids)
# Generate another block, they should all get mined
blocks = node.generate(1)
# mempool should be empty, all txns confirmed
assert_equal(set(node.getrawmempool()), set())
confirmed_txns = set(node.getblock(blocks[0])['tx'])
assert spends_ids < confirmed_txns
if __name__ == '__main__':
MempoolCoinbaseTest().main()
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