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475aae846e
By specifying the `datacarriersize` option instead of the more generic `acceptnonstdtxn`, we can be more specific about what part of the transaction is non-standard and can be sure that all other aspects follow the standard policy.
87 lines
4.0 KiB
Python
Executable File
87 lines
4.0 KiB
Python
Executable File
#!/usr/bin/env python3
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# Copyright (c) 2014-2021 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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"""Test mempool limiting together/eviction with the wallet."""
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from decimal import Decimal
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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.util import (
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assert_equal,
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assert_greater_than,
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assert_raises_rpc_error,
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create_lots_of_big_transactions,
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gen_return_txouts,
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)
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from test_framework.wallet import MiniWallet
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class MempoolLimitTest(BitcoinTestFramework):
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def set_test_params(self):
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self.setup_clean_chain = True
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self.num_nodes = 1
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self.extra_args = [[
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"-datacarriersize=100000",
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"-maxmempool=5",
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"-spendzeroconfchange=0",
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]]
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self.supports_cli = False
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def run_test(self):
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txouts = gen_return_txouts()
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node = self.nodes[0]
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miniwallet = MiniWallet(node)
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relayfee = node.getnetworkinfo()['relayfee']
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self.log.info('Check that mempoolminfee is minrelaytxfee')
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assert_equal(node.getmempoolinfo()['minrelaytxfee'], Decimal('0.00001000'))
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assert_equal(node.getmempoolinfo()['mempoolminfee'], Decimal('0.00001000'))
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tx_batch_size = 25
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num_of_batches = 3
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# Generate UTXOs to flood the mempool
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# 1 to create a tx initially that will be evicted from the mempool later
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# 3 batches of multiple transactions with a fee rate much higher than the previous UTXO
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# And 1 more to verify that this tx does not get added to the mempool with a fee rate less than the mempoolminfee
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self.generate(miniwallet, 1 + (num_of_batches * tx_batch_size) + 1)
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# Mine 99 blocks so that the UTXOs are allowed to be spent
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self.generate(node, COINBASE_MATURITY - 1)
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self.log.info('Create a mempool tx that will be evicted')
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tx_to_be_evicted_id = miniwallet.send_self_transfer(from_node=node, fee_rate=relayfee)["txid"]
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# Increase the tx fee rate to give the subsequent transactions a higher priority in the mempool
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# The tx has an approx. vsize of 65k, i.e. multiplying the previous fee rate (in sats/kvB)
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# by 130 should result in a fee that corresponds to 2x of that fee rate
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base_fee = relayfee * 130
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self.log.info("Fill up the mempool with txs with higher fee rate")
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for batch_of_txid in range(num_of_batches):
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fee = (batch_of_txid + 1) * base_fee
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create_lots_of_big_transactions(miniwallet, node, fee, tx_batch_size, txouts)
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self.log.info('The tx should be evicted by now')
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# The number of transactions created should be greater than the ones present in the mempool
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assert_greater_than(tx_batch_size * num_of_batches, len(node.getrawmempool()))
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# Initial tx created should not be present in the mempool anymore as it had a lower fee rate
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assert tx_to_be_evicted_id not in node.getrawmempool()
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self.log.info('Check that mempoolminfee is larger than minrelaytxfee')
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assert_equal(node.getmempoolinfo()['minrelaytxfee'], Decimal('0.00001000'))
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assert_greater_than(node.getmempoolinfo()['mempoolminfee'], Decimal('0.00001000'))
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# Deliberately try to create a tx with a fee less than the minimum mempool fee to assert that it does not get added to the mempool
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self.log.info('Create a mempool tx that will not pass mempoolminfee')
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assert_raises_rpc_error(-26, "mempool min fee not met", miniwallet.send_self_transfer, from_node=node, fee_rate=relayfee)
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self.log.info('Test passing a value below the minimum (5 MB) to -maxmempool throws an error')
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self.stop_node(0)
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self.nodes[0].assert_start_raises_init_error(["-maxmempool=4"], "Error: -maxmempool must be at least 5 MB")
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if __name__ == '__main__':
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MempoolLimitTest().main()
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