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82 lines
3.9 KiB
Python
Executable File
82 lines
3.9 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 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 assert_equal, assert_greater_than, assert_raises_rpc_error, gen_return_txouts
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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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"-acceptnonstdtxn=1",
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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 send_large_txs(self, node, miniwallet, txouts, fee_rate, tx_batch_size):
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for _ in range(tx_batch_size):
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tx = miniwallet.create_self_transfer(from_node=node, fee_rate=fee_rate)['tx']
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for txout in txouts:
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tx.vout.append(txout)
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miniwallet.sendrawtransaction(from_node=node, tx_hex=tx.serialize().hex())
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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 massively to give the subsequent transactions a higher priority in the mempool
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base_fee = relayfee * 1000
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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_rate=(batch_of_txid + 1) * base_fee
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self.send_large_txs(node, miniwallet, txouts, fee_rate, tx_batch_size)
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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, mempool_valid=False)
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if __name__ == '__main__':
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MempoolLimitTest().main()
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