mirror of https://github.com/bitcoin/bitcoin
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
125 lines
6.0 KiB
125 lines
6.0 KiB
#!/usr/bin/env python3
|
|
# Copyright (c) 2020-2021 The Bitcoin Core developers
|
|
# Distributed under the MIT software license, see the accompanying
|
|
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
|
|
"""Test mempool descendants/ancestors information update.
|
|
|
|
Test mempool update of transaction descendants/ancestors information (count, size)
|
|
when transactions have been re-added from a disconnected block to the mempool.
|
|
"""
|
|
import time
|
|
|
|
from decimal import Decimal
|
|
from test_framework.test_framework import BitcoinTestFramework
|
|
from test_framework.util import assert_equal
|
|
|
|
|
|
class MempoolUpdateFromBlockTest(BitcoinTestFramework):
|
|
def set_test_params(self):
|
|
self.num_nodes = 1
|
|
self.extra_args = [['-limitdescendantsize=1000', '-limitancestorsize=1000']]
|
|
|
|
def skip_test_if_missing_module(self):
|
|
self.skip_if_no_wallet()
|
|
|
|
def transaction_graph_test(self, size, n_tx_to_mine=None, start_input_txid='', end_address='', fee=Decimal(0.00100000)):
|
|
"""Create an acyclic tournament (a type of directed graph) of transactions and use it for testing.
|
|
|
|
Keyword arguments:
|
|
size -- the order N of the tournament which is equal to the number of the created transactions
|
|
n_tx_to_mine -- the number of transaction that should be mined into a block
|
|
|
|
If all of the N created transactions tx[0]..tx[N-1] reside in the mempool,
|
|
the following holds:
|
|
the tx[K] transaction:
|
|
- has N-K descendants (including this one), and
|
|
- has K+1 ancestors (including this one)
|
|
|
|
More details: https://en.wikipedia.org/wiki/Tournament_(graph_theory)
|
|
"""
|
|
|
|
if not start_input_txid:
|
|
start_input_txid = self.nodes[0].getblock(self.nodes[0].getblockhash(1))['tx'][0]
|
|
|
|
if not end_address:
|
|
end_address = self.nodes[0].getnewaddress()
|
|
|
|
first_block_hash = ''
|
|
tx_id = []
|
|
tx_size = []
|
|
self.log.info('Creating {} transactions...'.format(size))
|
|
for i in range(0, size):
|
|
self.log.debug('Preparing transaction #{}...'.format(i))
|
|
# Prepare inputs.
|
|
if i == 0:
|
|
inputs = [{'txid': start_input_txid, 'vout': 0}]
|
|
inputs_value = self.nodes[0].gettxout(start_input_txid, 0)['value']
|
|
else:
|
|
inputs = []
|
|
inputs_value = 0
|
|
for j, tx in enumerate(tx_id[0:i]):
|
|
# Transaction tx[K] is a child of each of previous transactions tx[0]..tx[K-1] at their output K-1.
|
|
vout = i - j - 1
|
|
inputs.append({'txid': tx_id[j], 'vout': vout})
|
|
inputs_value += self.nodes[0].gettxout(tx, vout)['value']
|
|
|
|
self.log.debug('inputs={}'.format(inputs))
|
|
self.log.debug('inputs_value={}'.format(inputs_value))
|
|
|
|
# Prepare outputs.
|
|
tx_count = i + 1
|
|
if tx_count < size:
|
|
# Transaction tx[K] is an ancestor of each of subsequent transactions tx[K+1]..tx[N-1].
|
|
n_outputs = size - tx_count
|
|
output_value = ((inputs_value - fee) / Decimal(n_outputs)).quantize(Decimal('0.00000001'))
|
|
outputs = {}
|
|
for _ in range(n_outputs):
|
|
outputs[self.nodes[0].getnewaddress()] = output_value
|
|
else:
|
|
output_value = (inputs_value - fee).quantize(Decimal('0.00000001'))
|
|
outputs = {end_address: output_value}
|
|
|
|
self.log.debug('output_value={}'.format(output_value))
|
|
self.log.debug('outputs={}'.format(outputs))
|
|
|
|
# Create a new transaction.
|
|
unsigned_raw_tx = self.nodes[0].createrawtransaction(inputs, outputs)
|
|
signed_raw_tx = self.nodes[0].signrawtransactionwithwallet(unsigned_raw_tx)
|
|
tx_id.append(self.nodes[0].sendrawtransaction(signed_raw_tx['hex']))
|
|
tx_size.append(self.nodes[0].getmempoolentry(tx_id[-1])['vsize'])
|
|
|
|
if tx_count in n_tx_to_mine:
|
|
# The created transactions are mined into blocks by batches.
|
|
self.log.info('The batch of {} transactions has been accepted into the mempool.'.format(len(self.nodes[0].getrawmempool())))
|
|
block_hash = self.generate(self.nodes[0], 1)[0]
|
|
if not first_block_hash:
|
|
first_block_hash = block_hash
|
|
assert_equal(len(self.nodes[0].getrawmempool()), 0)
|
|
self.log.info('All of the transactions from the current batch have been mined into a block.')
|
|
elif tx_count == size:
|
|
# At the end all of the mined blocks are invalidated, and all of the created
|
|
# transactions should be re-added from disconnected blocks to the mempool.
|
|
self.log.info('The last batch of {} transactions has been accepted into the mempool.'.format(len(self.nodes[0].getrawmempool())))
|
|
start = time.time()
|
|
self.nodes[0].invalidateblock(first_block_hash)
|
|
end = time.time()
|
|
assert_equal(len(self.nodes[0].getrawmempool()), size)
|
|
self.log.info('All of the recently mined transactions have been re-added into the mempool in {} seconds.'.format(end - start))
|
|
|
|
self.log.info('Checking descendants/ancestors properties of all of the in-mempool transactions...')
|
|
for k, tx in enumerate(tx_id):
|
|
self.log.debug('Check transaction #{}.'.format(k))
|
|
entry = self.nodes[0].getmempoolentry(tx)
|
|
assert_equal(entry['descendantcount'], size - k)
|
|
assert_equal(entry['descendantsize'], sum(tx_size[k:size]))
|
|
assert_equal(entry['ancestorcount'], k + 1)
|
|
assert_equal(entry['ancestorsize'], sum(tx_size[0:(k + 1)]))
|
|
|
|
def run_test(self):
|
|
# Use batch size limited by DEFAULT_ANCESTOR_LIMIT = 25 to not fire "too many unconfirmed parents" error.
|
|
self.transaction_graph_test(size=100, n_tx_to_mine=[25, 50, 75])
|
|
|
|
|
|
if __name__ == '__main__':
|
|
MempoolUpdateFromBlockTest().main()
|