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115 lines
5.4 KiB
115 lines
5.4 KiB
3 years ago
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#!/usr/bin/env python3
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# Copyright (c) 2014-2020 The Bitcoin Core developers
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# Distributed under the MIT software license, see the accompanying
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# file COPYING or http://www.opensource.org/licenses/mit-license.php.
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"""Test mempool re-org scenarios.
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Test re-org scenarios with a mempool that contains transactions
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that spend (directly or indirectly) coinbase transactions.
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"""
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from test_framework.test_framework import BitcoinTestFramework
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from test_framework.util import assert_equal, assert_raises_rpc_error
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from test_framework.wallet import MiniWallet
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class MempoolCoinbaseTest(BitcoinTestFramework):
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def set_test_params(self):
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self.num_nodes = 2
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self.extra_args = [
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[
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'-whitelist=noban@127.0.0.1', # immediate tx relay
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],
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[]
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]
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def run_test(self):
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wallet = MiniWallet(self.nodes[0])
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# Start with a 200 block chain
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assert_equal(self.nodes[0].getblockcount(), 200)
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self.log.info("Add 4 coinbase utxos to the miniwallet")
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# Block 76 contains the first spendable coinbase txs.
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first_block = 76
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wallet.scan_blocks(start=first_block, num=4)
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# Three scenarios for re-orging coinbase spends in the memory pool:
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# 1. Direct coinbase spend : spend_1
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# 2. Indirect (coinbase spend in chain, child in mempool) : spend_2 and spend_2_1
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# 3. Indirect (coinbase and child both in chain) : spend_3 and spend_3_1
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# Use invalidateblock to make all of the above coinbase spends invalid (immature coinbase),
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# and make sure the mempool code behaves correctly.
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b = [self.nodes[0].getblockhash(n) for n in range(first_block, first_block+4)]
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coinbase_txids = [self.nodes[0].getblock(h)['tx'][0] for h in b]
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utxo_1 = wallet.get_utxo(txid=coinbase_txids[1])
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utxo_2 = wallet.get_utxo(txid=coinbase_txids[2])
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utxo_3 = wallet.get_utxo(txid=coinbase_txids[3])
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self.log.info("Create three transactions spending from coinbase utxos: spend_1, spend_2, spend_3")
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spend_1 = wallet.create_self_transfer(from_node=self.nodes[0], utxo_to_spend=utxo_1)
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spend_2 = wallet.create_self_transfer(from_node=self.nodes[0], utxo_to_spend=utxo_2)
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spend_3 = wallet.create_self_transfer(from_node=self.nodes[0], utxo_to_spend=utxo_3)
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self.log.info("Create another transaction which is time-locked to two blocks in the future")
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utxo = wallet.get_utxo(txid=coinbase_txids[0])
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timelock_tx = wallet.create_self_transfer(
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from_node=self.nodes[0],
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utxo_to_spend=utxo,
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mempool_valid=False,
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locktime=self.nodes[0].getblockcount() + 2
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)['hex']
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self.log.info("Check that the time-locked transaction is too immature to spend")
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assert_raises_rpc_error(-26, "non-final", self.nodes[0].sendrawtransaction, timelock_tx)
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self.log.info("Broadcast and mine spend_2 and spend_3")
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wallet.sendrawtransaction(from_node=self.nodes[0], tx_hex=spend_2['hex'])
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wallet.sendrawtransaction(from_node=self.nodes[0], tx_hex=spend_3['hex'])
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self.log.info("Generate a block")
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self.nodes[0].generate(1)
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self.log.info("Check that time-locked transaction is still too immature to spend")
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assert_raises_rpc_error(-26, 'non-final', self.nodes[0].sendrawtransaction, timelock_tx)
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self.log.info("Create spend_2_1 and spend_3_1")
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spend_2_utxo = wallet.get_utxo(txid=spend_2['txid'])
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spend_2_1 = wallet.create_self_transfer(from_node=self.nodes[0], utxo_to_spend=spend_2_utxo)
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spend_3_utxo = wallet.get_utxo(txid=spend_3['txid'])
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spend_3_1 = wallet.create_self_transfer(from_node=self.nodes[0], utxo_to_spend=spend_3_utxo)
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self.log.info("Broadcast and mine spend_3_1")
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spend_3_1_id = self.nodes[0].sendrawtransaction(spend_3_1['hex'])
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self.log.info("Generate a block")
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last_block = self.nodes[0].generate(1)
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# Sync blocks, so that peer 1 gets the block before timelock_tx
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# Otherwise, peer 1 would put the timelock_tx in recentRejects
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self.sync_all()
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self.log.info("The time-locked transaction can now be spent")
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timelock_tx_id = self.nodes[0].sendrawtransaction(timelock_tx)
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self.log.info("Add spend_1 and spend_2_1 to the mempool")
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spend_1_id = self.nodes[0].sendrawtransaction(spend_1['hex'])
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spend_2_1_id = self.nodes[0].sendrawtransaction(spend_2_1['hex'])
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assert_equal(set(self.nodes[0].getrawmempool()), {spend_1_id, spend_2_1_id, timelock_tx_id})
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self.sync_all()
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self.log.info("invalidate the last block")
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for node in self.nodes:
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node.invalidateblock(last_block[0])
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self.log.info("The time-locked transaction is now too immature and has been removed from the mempool")
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self.log.info("spend_3_1 has been re-orged out of the chain and is back in the mempool")
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assert_equal(set(self.nodes[0].getrawmempool()), {spend_1_id, spend_2_1_id, spend_3_1_id})
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self.log.info("Use invalidateblock to re-org back and make all those coinbase spends immature/invalid")
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b = self.nodes[0].getblockhash(first_block + 100)
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for node in self.nodes:
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node.invalidateblock(b)
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self.log.info("Check that the mempool is empty")
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assert_equal(set(self.nodes[0].getrawmempool()), set())
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self.sync_all()
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if __name__ == '__main__':
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MempoolCoinbaseTest().main()
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