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81 lines
3.9 KiB
81 lines
3.9 KiB
#!/usr/bin/env python3
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# Copyright (c) 2014-2022 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 descendant package tracking carve-out allowing one final transaction in
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an otherwise-full package as long as it has only one parent and is <= 10k in
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size.
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"""
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from test_framework.messages import (
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DEFAULT_ANCESTOR_LIMIT,
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)
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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_equal,
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assert_raises_rpc_error,
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)
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from test_framework.wallet import MiniWallet
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class MempoolPackagesTest(BitcoinTestFramework):
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def set_test_params(self):
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self.num_nodes = 1
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def chain_tx(self, utxos_to_spend, *, num_outputs=1):
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return self.wallet.send_self_transfer_multi(
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from_node=self.nodes[0],
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utxos_to_spend=utxos_to_spend,
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num_outputs=num_outputs)['new_utxos']
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def run_test(self):
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self.wallet = MiniWallet(self.nodes[0])
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# DEFAULT_ANCESTOR_LIMIT transactions off a confirmed tx should be fine
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chain = []
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utxo = self.wallet.get_utxo()
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for _ in range(4):
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utxo, utxo2 = self.chain_tx([utxo], num_outputs=2)
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chain.append(utxo2)
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for _ in range(DEFAULT_ANCESTOR_LIMIT - 4):
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utxo, = self.chain_tx([utxo])
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chain.append(utxo)
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second_chain, = self.chain_tx([self.wallet.get_utxo(confirmed_only=True)])
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# Check mempool has DEFAULT_ANCESTOR_LIMIT + 1 transactions in it
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assert_equal(len(self.nodes[0].getrawmempool()), DEFAULT_ANCESTOR_LIMIT + 1)
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# Adding one more transaction on to the chain should fail.
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assert_raises_rpc_error(-26, "too-long-mempool-chain, too many unconfirmed ancestors [limit: 25]", self.chain_tx, [utxo])
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# ... or if it chains on from some point in the middle of the chain.
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assert_raises_rpc_error(-26, "too-long-mempool-chain, too many descendants", self.chain_tx, [chain[2]])
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assert_raises_rpc_error(-26, "too-long-mempool-chain, too many descendants", self.chain_tx, [chain[1]])
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# ...even if it chains on to two parent transactions with one in the chain.
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assert_raises_rpc_error(-26, "too-long-mempool-chain, too many descendants", self.chain_tx, [chain[0], second_chain])
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# ...especially if its > 40k weight
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assert_raises_rpc_error(-26, "too-long-mempool-chain, too many descendants", self.chain_tx, [chain[0]], num_outputs=350)
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# ...even if it's submitted with other transactions
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replaceable_tx = self.wallet.create_self_transfer_multi(utxos_to_spend=[chain[0]])
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txns = [replaceable_tx["tx"], self.wallet.create_self_transfer_multi(utxos_to_spend=replaceable_tx["new_utxos"])["tx"]]
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txns_hex = [tx.serialize().hex() for tx in txns]
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assert_equal(self.nodes[0].testmempoolaccept(txns_hex)[0]["reject-reason"], "too-long-mempool-chain")
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pkg_result = self.nodes[0].submitpackage(txns_hex)
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assert "too-long-mempool-chain" in pkg_result["tx-results"][txns[0].getwtxid()]["error"]
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assert_equal(pkg_result["tx-results"][txns[1].getwtxid()]["error"], "bad-txns-inputs-missingorspent")
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# But not if it chains directly off the first transaction
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self.nodes[0].sendrawtransaction(replaceable_tx["hex"])
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# and the second chain should work just fine
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self.chain_tx([second_chain])
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# Ensure an individual transaction with single direct conflict can RBF the chain which used our carve-out rule
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replacement_tx = replaceable_tx["tx"]
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replacement_tx.vout[0].nValue -= 1000000
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self.nodes[0].sendrawtransaction(replacement_tx.serialize().hex())
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# Finally, check that we added two transactions
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assert_equal(len(self.nodes[0].getrawmempool()), DEFAULT_ANCESTOR_LIMIT + 3)
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if __name__ == '__main__':
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MempoolPackagesTest(__file__).main()
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