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83 lines
3.4 KiB
83 lines
3.4 KiB
3 years ago
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#!/usr/bin/env python3
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# Copyright (c) 2017-2020 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 that mempool.dat is both backward and forward compatible between versions
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NOTE: The test is designed to prevent cases when compatibility is broken accidentally.
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In case we need to break mempool compatibility we can continue to use the test by just bumping the version number.
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The previous release v0.15.2 is required by this test, see test/README.md.
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"""
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import os
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from test_framework.blocktools import COINBASE_MATURITY
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from test_framework.test_framework import BitcoinTestFramework
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from test_framework.wallet import MiniWallet
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class MempoolCompatibilityTest(BitcoinTestFramework):
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def set_test_params(self):
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self.num_nodes = 2
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self.wallet_names = [None]
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def skip_test_if_missing_module(self):
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self.skip_if_no_previous_releases()
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def setup_network(self):
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self.add_nodes(self.num_nodes, versions=[
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190100, # oldest version with getmempoolinfo.loaded (used to avoid intermittent issues)
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None,
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])
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self.start_nodes()
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self.import_deterministic_coinbase_privkeys()
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def run_test(self):
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self.log.info("Test that mempool.dat is compatible between versions")
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old_node, new_node = self.nodes
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new_wallet = MiniWallet(new_node)
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new_wallet.generate(1)
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new_node.generate(COINBASE_MATURITY)
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# Sync the nodes to ensure old_node has the block that contains the coinbase that new_wallet will spend.
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# Otherwise, because coinbases are only valid in a block and not as loose txns, if the nodes aren't synced
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# unbroadcasted_tx won't pass old_node's `MemPoolAccept::PreChecks`.
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self.connect_nodes(0, 1)
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self.sync_blocks()
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recipient = old_node.getnewaddress()
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self.stop_node(1)
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self.log.info("Add a transaction to mempool on old node and shutdown")
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old_tx_hash = old_node.sendtoaddress(recipient, 0.0001)
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assert old_tx_hash in old_node.getrawmempool()
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self.stop_node(0)
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self.log.info("Move mempool.dat from old to new node")
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old_node_mempool = os.path.join(old_node.datadir, self.chain, 'mempool.dat')
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new_node_mempool = os.path.join(new_node.datadir, self.chain, 'mempool.dat')
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os.rename(old_node_mempool, new_node_mempool)
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self.log.info("Start new node and verify mempool contains the tx")
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self.start_node(1)
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assert old_tx_hash in new_node.getrawmempool()
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self.log.info("Add unbroadcasted tx to mempool on new node and shutdown")
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unbroadcasted_tx_hash = new_wallet.send_self_transfer(from_node=new_node)['txid']
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assert unbroadcasted_tx_hash in new_node.getrawmempool()
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mempool = new_node.getrawmempool(True)
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assert mempool[unbroadcasted_tx_hash]['unbroadcast']
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self.stop_node(1)
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self.log.info("Move mempool.dat from new to old node")
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os.rename(new_node_mempool, old_node_mempool)
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self.log.info("Start old node again and verify mempool contains both txs")
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self.start_node(0, ['-nowallet'])
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assert old_tx_hash in old_node.getrawmempool()
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assert unbroadcasted_tx_hash in old_node.getrawmempool()
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if __name__ == "__main__":
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MempoolCompatibilityTest().main()
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