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afaaba69ed
useful to easily create transactions with same txid, different wtxid and valid witness for testing scenarios in other places (ex: private broadcast connections)
96 lines
4.0 KiB
Python
Executable File
96 lines
4.0 KiB
Python
Executable File
#!/usr/bin/env python3
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# Copyright (c) 2021 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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"""
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Test mempool acceptance in case of an already known transaction
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with identical non-witness data but different witness.
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"""
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from test_framework.messages import (
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COIN,
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)
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from test_framework.p2p import P2PTxInvStore
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from test_framework.script_util import ValidWitnessMalleatedTx
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from test_framework.test_framework import BitcoinTestFramework
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from test_framework.util import (
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assert_not_equal,
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assert_equal,
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)
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class MempoolWtxidTest(BitcoinTestFramework):
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def set_test_params(self):
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self.num_nodes = 1
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self.setup_clean_chain = True
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def run_test(self):
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node = self.nodes[0]
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self.log.info('Start with empty mempool and 101 blocks')
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# The last 100 coinbase transactions are premature
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blockhash = self.generate(node, 101)[0]
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txid = node.getblock(blockhash=blockhash, verbosity=2)["tx"][0]["txid"]
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assert_equal(node.getmempoolinfo()['size'], 0)
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self.log.info("Submit parent with multiple script branches to mempool")
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txgen = ValidWitnessMalleatedTx()
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parent = txgen.build_parent_tx(txid, 9.99998 * COIN)
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privkeys = [node.get_deterministic_priv_key().key]
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raw_parent = node.signrawtransactionwithkey(hexstring=parent.serialize().hex(), privkeys=privkeys)['hex']
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signed_parent_txid = node.sendrawtransaction(hexstring=raw_parent, maxfeerate=0)
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self.generate(node, 1)
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peer_wtxid_relay = node.add_p2p_connection(P2PTxInvStore())
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child_one, child_two = txgen.build_malleated_children(signed_parent_txid, 9.99996 * COIN)
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child_one_wtxid = child_one.wtxid_hex
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child_one_txid = child_one.txid_hex
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child_two_wtxid = child_two.wtxid_hex
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child_two_txid = child_two.txid_hex
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assert_equal(child_one_txid, child_two_txid)
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assert_not_equal(child_one_wtxid, child_two_wtxid)
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self.log.info("Submit child_one to the mempool")
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txid_submitted = node.sendrawtransaction(child_one.serialize().hex())
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assert_equal(node.getmempoolentry(txid_submitted)['wtxid'], child_one_wtxid)
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peer_wtxid_relay.wait_for_broadcast([child_one_wtxid])
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assert_equal(node.getmempoolinfo()["unbroadcastcount"], 0)
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# testmempoolaccept reports the "already in mempool" error
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assert_equal(node.testmempoolaccept([child_one.serialize().hex()]), [{
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"txid": child_one_txid,
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"wtxid": child_one_wtxid,
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"allowed": False,
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"reject-reason": "txn-already-in-mempool",
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"reject-details": "txn-already-in-mempool"
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}])
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assert_equal(node.testmempoolaccept([child_two.serialize().hex()])[0], {
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"txid": child_two_txid,
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"wtxid": child_two_wtxid,
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"allowed": False,
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"reject-reason": "txn-same-nonwitness-data-in-mempool",
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"reject-details": "txn-same-nonwitness-data-in-mempool"
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})
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# sendrawtransaction will not throw but quits early when the exact same transaction is already in mempool
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node.sendrawtransaction(child_one.serialize().hex())
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self.log.info("Connect another peer that hasn't seen child_one before")
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peer_wtxid_relay_2 = node.add_p2p_connection(P2PTxInvStore())
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self.log.info("Submit child_two to the mempool")
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# sendrawtransaction will not throw but quits early when a transaction with the same non-witness data is already in mempool
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node.sendrawtransaction(child_two.serialize().hex())
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# The node should rebroadcast the transaction using the wtxid of the correct transaction
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# (child_one, which is in its mempool).
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peer_wtxid_relay_2.wait_for_broadcast([child_one_wtxid])
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assert_equal(node.getmempoolinfo()["unbroadcastcount"], 0)
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if __name__ == '__main__':
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MempoolWtxidTest(__file__).main()
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