git / moonbite-core / test/functional/mempool_reorg.py · raw

#!/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 mempool re-org scenarios.Test re-org scenarios with a mempool that contains transactionsthat spend (directly or indirectly) coinbase transactions."""from test_framework.blocktools import create_raw_transactionfrom test_framework.test_framework import BitcoinTestFrameworkfrom test_framework.util import assert_equal, assert_raises_rpc_errorclass MempoolCoinbaseTest(BitcoinTestFramework):    def set_test_params(self):        self.num_nodes = 2        self.extra_args = [            [                '-whitelist=noban@127.0.0.1',  # immediate tx relay            ],            []        ]    def skip_test_if_missing_module(self):        self.skip_if_no_wallet()    def run_test(self):        # Start with a 200 block chain        assert_equal(self.nodes[0].getblockcount(), 200)        # Mine four blocks. After this, nodes[0] blocks        # 101, 102, and 103 are spend-able.        new_blocks = self.nodes[1].generate(4)        self.sync_all()        node0_address = self.nodes[0].getnewaddress()        node1_address = self.nodes[1].getnewaddress()        # Three scenarios for re-orging coinbase spends in the memory pool:        # 1. Direct coinbase spend  :  spend_101        # 2. Indirect (coinbase spend in chain, child in mempool) : spend_102 and spend_102_1        # 3. Indirect (coinbase and child both in chain) : spend_103 and spend_103_1        # Use invalidatblock to make all of the above coinbase spends invalid (immature coinbase),        # and make sure the mempool code behaves correctly.        b = [self.nodes[0].getblockhash(n) for n in range(101, 105)]        coinbase_txids = [self.nodes[0].getblock(h)['tx'][0] for h in b]        spend_101_raw = create_raw_transaction(self.nodes[0], coinbase_txids[1], node1_address, amount=49.99)        spend_102_raw = create_raw_transaction(self.nodes[0], coinbase_txids[2], node0_address, amount=49.99)        spend_103_raw = create_raw_transaction(self.nodes[0], coinbase_txids[3], node0_address, amount=49.99)        # Create a transaction which is time-locked to two blocks in the future        timelock_tx = self.nodes[0].createrawtransaction(            inputs=[{                "txid": coinbase_txids[0],                "vout": 0,            }],            outputs={node0_address: 49.99},            locktime=self.nodes[0].getblockcount() + 2,        )        timelock_tx = self.nodes[0].signrawtransactionwithwallet(timelock_tx)["hex"]        # This will raise an exception because the timelock transaction is too immature to spend        assert_raises_rpc_error(-26, "non-final", self.nodes[0].sendrawtransaction, timelock_tx)        # Broadcast and mine spend_102 and 103:        spend_102_id = self.nodes[0].sendrawtransaction(spend_102_raw)        spend_103_id = self.nodes[0].sendrawtransaction(spend_103_raw)        self.nodes[0].generate(1)        # Time-locked transaction is still too immature to spend        assert_raises_rpc_error(-26, 'non-final', self.nodes[0].sendrawtransaction, timelock_tx)        # Create 102_1 and 103_1:        spend_102_1_raw = create_raw_transaction(self.nodes[0], spend_102_id, node1_address, amount=49.98)        spend_103_1_raw = create_raw_transaction(self.nodes[0], spend_103_id, node1_address, amount=49.98)        # Broadcast and mine 103_1:        spend_103_1_id = self.nodes[0].sendrawtransaction(spend_103_1_raw)        last_block = self.nodes[0].generate(1)        # Sync blocks, so that peer 1 gets the block before timelock_tx        # Otherwise, peer 1 would put the timelock_tx in recentRejects        self.sync_all()        # Time-locked transaction can now be spent        timelock_tx_id = self.nodes[0].sendrawtransaction(timelock_tx)        # ... now put spend_101 and spend_102_1 in memory pools:        spend_101_id = self.nodes[0].sendrawtransaction(spend_101_raw)        spend_102_1_id = self.nodes[0].sendrawtransaction(spend_102_1_raw)        assert_equal(set(self.nodes[0].getrawmempool()), {spend_101_id, spend_102_1_id, timelock_tx_id})        self.sync_all()        for node in self.nodes:            node.invalidateblock(last_block[0])        # Time-locked transaction is now too immature and has been removed from the mempool        # spend_103_1 has been re-orged out of the chain and is back in the mempool        assert_equal(set(self.nodes[0].getrawmempool()), {spend_101_id, spend_102_1_id, spend_103_1_id})        # Use invalidateblock to re-org back and make all those coinbase spends        # immature/invalid:        for node in self.nodes:            node.invalidateblock(new_blocks[0])        # mempool should be empty.        assert_equal(set(self.nodes[0].getrawmempool()), set())        self.sync_all()if __name__ == '__main__':    MempoolCoinbaseTest().main()