dac7a111bd
substitutes "for x in range(N):" by "for _ in range(N):" indicates to the reader that a block is just repeated N times, and that the loop counter is not used in the body
93 lines
4.9 KiB
Python
Executable file
93 lines
4.9 KiB
Python
Executable file
#!/usr/bin/env python3
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# Copyright (c) 2014-2019 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 decimal import Decimal
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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, satoshi_round
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MAX_ANCESTORS = 25
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MAX_DESCENDANTS = 25
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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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self.extra_args = [["-maxorphantx=1000"]]
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def skip_test_if_missing_module(self):
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self.skip_if_no_wallet()
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# Build a transaction that spends parent_txid:vout
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# Return amount sent
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def chain_transaction(self, node, parent_txids, vouts, value, fee, num_outputs):
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send_value = satoshi_round((value - fee)/num_outputs)
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inputs = []
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for (txid, vout) in zip(parent_txids, vouts):
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inputs.append({'txid' : txid, 'vout' : vout})
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outputs = {}
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for _ in range(num_outputs):
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outputs[node.getnewaddress()] = send_value
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rawtx = node.createrawtransaction(inputs, outputs, 0, True)
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signedtx = node.signrawtransactionwithwallet(rawtx)
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txid = node.sendrawtransaction(signedtx['hex'])
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fulltx = node.getrawtransaction(txid, 1)
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assert len(fulltx['vout']) == num_outputs # make sure we didn't generate a change output
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return (txid, send_value)
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def run_test(self):
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# Mine some blocks and have them mature.
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self.nodes[0].generate(101)
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utxo = self.nodes[0].listunspent(10)
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txid = utxo[0]['txid']
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vout = utxo[0]['vout']
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value = utxo[0]['amount']
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fee = Decimal("0.0002")
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# MAX_ANCESTORS transactions off a confirmed tx should be fine
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chain = []
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for _ in range(4):
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(txid, sent_value) = self.chain_transaction(self.nodes[0], [txid], [vout], value, fee, 2)
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vout = 0
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value = sent_value
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chain.append([txid, value])
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for _ in range(MAX_ANCESTORS - 4):
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(txid, sent_value) = self.chain_transaction(self.nodes[0], [txid], [0], value, fee, 1)
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value = sent_value
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chain.append([txid, value])
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(second_chain, second_chain_value) = self.chain_transaction(self.nodes[0], [utxo[1]['txid']], [utxo[1]['vout']], utxo[1]['amount'], fee, 1)
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# Check mempool has MAX_ANCESTORS + 1 transactions in it
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assert_equal(len(self.nodes[0].getrawmempool(True)), MAX_ANCESTORS + 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_transaction, self.nodes[0], [txid], [0], value, fee, 1)
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# ...even 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_transaction, self.nodes[0], [chain[2][0]], [1], chain[2][1], fee, 1)
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assert_raises_rpc_error(-26, "too-long-mempool-chain, too many descendants", self.chain_transaction, self.nodes[0], [chain[1][0]], [1], chain[1][1], fee, 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_transaction, self.nodes[0], [chain[0][0], second_chain], [1, 0], chain[0][1] + second_chain_value, fee, 1)
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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_transaction, self.nodes[0], [chain[0][0]], [1], chain[0][1], fee, 350)
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# But not if it chains directly off the first transaction
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(replacable_txid, replacable_orig_value) = self.chain_transaction(self.nodes[0], [chain[0][0]], [1], chain[0][1], fee, 1)
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# and the second chain should work just fine
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self.chain_transaction(self.nodes[0], [second_chain], [0], second_chain_value, fee, 1)
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# Make sure we can RBF the chain which used our carve-out rule
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second_tx_outputs = {self.nodes[0].getrawtransaction(replacable_txid, True)["vout"][0]['scriptPubKey']['addresses'][0]: replacable_orig_value - (Decimal(1) / Decimal(100))}
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second_tx = self.nodes[0].createrawtransaction([{'txid': chain[0][0], 'vout': 1}], second_tx_outputs)
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signed_second_tx = self.nodes[0].signrawtransactionwithwallet(second_tx)
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self.nodes[0].sendrawtransaction(signed_second_tx['hex'])
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# Finally, check that we added two transactions
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assert_equal(len(self.nodes[0].getrawmempool(True)), MAX_ANCESTORS + 3)
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if __name__ == '__main__':
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MempoolPackagesTest().main()
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