git / moonbite-core / test/functional/mempool_package_onemore.py · raw

#!/usr/bin/env python3# Copyright (c) 2014-2019 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 descendant package tracking carve-out allowing one final transaction in   an otherwise-full package as long as it has only one parent and is <= 10k in   size."""from decimal import Decimalfrom test_framework.test_framework import BitcoinTestFrameworkfrom test_framework.util import assert_equal, assert_raises_rpc_error, satoshi_roundMAX_ANCESTORS = 25MAX_DESCENDANTS = 25class MempoolPackagesTest(BitcoinTestFramework):    def set_test_params(self):        self.num_nodes = 1        self.extra_args = [["-maxorphantx=1000", "-mempoolreplacement=1"]]    def skip_test_if_missing_module(self):        self.skip_if_no_wallet()    # Build a transaction that spends parent_txid:vout    # Return amount sent    def chain_transaction(self, node, parent_txids, vouts, value, fee, num_outputs):        send_value = satoshi_round((value - fee)/num_outputs)        inputs = []        for (txid, vout) in zip(parent_txids, vouts):            inputs.append({'txid' : txid, 'vout' : vout})        outputs = {}        for _ in range(num_outputs):            outputs[node.getnewaddress()] = send_value        rawtx = node.createrawtransaction(inputs, outputs, 0, True)        signedtx = node.signrawtransactionwithwallet(rawtx)        txid = node.sendrawtransaction(signedtx['hex'])        fulltx = node.getrawtransaction(txid, 1)        assert len(fulltx['vout']) == num_outputs  # make sure we didn't generate a change output        return (txid, send_value)    def run_test(self):        # Mine some blocks and have them mature.        self.nodes[0].generate(101)        utxo = self.nodes[0].listunspent(10)        txid = utxo[0]['txid']        vout = utxo[0]['vout']        value = utxo[0]['amount']        fee = Decimal("0.0002")        # MAX_ANCESTORS transactions off a confirmed tx should be fine        chain = []        for _ in range(4):            (txid, sent_value) = self.chain_transaction(self.nodes[0], [txid], [vout], value, fee, 2)            vout = 0            value = sent_value            chain.append([txid, value])        for _ in range(MAX_ANCESTORS - 4):            (txid, sent_value) = self.chain_transaction(self.nodes[0], [txid], [0], value, fee, 1)            value = sent_value            chain.append([txid, value])        (second_chain, second_chain_value) = self.chain_transaction(self.nodes[0], [utxo[1]['txid']], [utxo[1]['vout']], utxo[1]['amount'], fee, 1)        # Check mempool has MAX_ANCESTORS + 1 transactions in it        assert_equal(len(self.nodes[0].getrawmempool(True)), MAX_ANCESTORS + 1)        # Adding one more transaction on to the chain should fail.        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)        # ...even if it chains on from some point in the middle of the chain.        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)        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)        # ...even if it chains on to two parent transactions with one in the chain.        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)        # ...especially if its > 40k weight        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)        # But not if it chains directly off the first transaction        (replacable_txid, replacable_orig_value) = self.chain_transaction(self.nodes[0], [chain[0][0]], [1], chain[0][1], fee, 1)        # and the second chain should work just fine        self.chain_transaction(self.nodes[0], [second_chain], [0], second_chain_value, fee, 1)        # Make sure we can RBF the chain which used our carve-out rule        second_tx_outputs = {self.nodes[0].getrawtransaction(replacable_txid, True)["vout"][0]['scriptPubKey']['addresses'][0]: replacable_orig_value - (Decimal(1) / Decimal(100))}        second_tx = self.nodes[0].createrawtransaction([{'txid': chain[0][0], 'vout': 1}], second_tx_outputs)        signed_second_tx = self.nodes[0].signrawtransactionwithwallet(second_tx)        self.nodes[0].sendrawtransaction(signed_second_tx['hex'])        # Finally, check that we added two transactions        assert_equal(len(self.nodes[0].getrawmempool(True)), MAX_ANCESTORS + 3)if __name__ == '__main__':    MempoolPackagesTest().main()