1 #!/usr/bin/env python3
2 # Copyright (c) 2014-2021 The Limenka developers
3 # Distributed under the MIT software license, see the accompanying
4 # file COPYING or http://www.opensource.org/licenses/mit-license.php.
5 """Test resurrection of mined transactions when the blockchain is re-organized."""
6 7 from test_framework.test_framework import LimenkaTestFramework
8 from test_framework.util import assert_equal
9 from test_framework.wallet import MiniWallet
10 11 12 class MempoolCoinbaseTest(LimenkaTestFramework):
13 def set_test_params(self):
14 self.num_nodes = 1
15 16 def run_test(self):
17 node = self.nodes[0]
18 wallet = MiniWallet(node)
19 20 # Spend block 1/2/3's coinbase transactions
21 # Mine a block
22 # Create three more transactions, spending the spends
23 # Mine another block
24 # ... make sure all the transactions are confirmed
25 # Invalidate both blocks
26 # ... make sure all the transactions are put back in the mempool
27 # Mine a new block
28 # ... make sure all the transactions are confirmed again
29 blocks = []
30 spends1_ids = [wallet.send_self_transfer(from_node=node)['txid'] for _ in range(3)]
31 blocks.extend(self.generate(node, 1))
32 spends2_ids = [wallet.send_self_transfer(from_node=node)['txid'] for _ in range(3)]
33 blocks.extend(self.generate(node, 1))
34 35 spends_ids = set(spends1_ids + spends2_ids)
36 37 # mempool should be empty, all txns confirmed
38 assert_equal(set(node.getrawmempool()), set())
39 confirmed_txns = set(node.getblock(blocks[0])['tx'] + node.getblock(blocks[1])['tx'])
40 # Checks that all spend txns are contained in the mined blocks
41 assert spends_ids < confirmed_txns
42 43 # Use invalidateblock to re-org back
44 node.invalidateblock(blocks[0])
45 46 # All txns should be back in mempool with 0 confirmations
47 assert_equal(set(node.getrawmempool()), spends_ids)
48 49 # Generate another block, they should all get mined
50 blocks = self.generate(node, 1)
51 # mempool should be empty, all txns confirmed
52 assert_equal(set(node.getrawmempool()), set())
53 confirmed_txns = set(node.getblock(blocks[0])['tx'])
54 assert spends_ids < confirmed_txns
55 56 57 if __name__ == '__main__':
58 MempoolCoinbaseTest(__file__).main()
59