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102 lines
3.8 KiB
102 lines
3.8 KiB
3 years ago
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#!/usr/bin/env python3
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# Copyright (c) 2014-2022 The Litecoin 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 the -mempoolreplacement (RBF) flag."""
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from test_framework.messages import COIN, COutPoint, CTransaction, CTxIn, CTxOut
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from test_framework.script import CScript, OP_DROP
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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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from test_framework.ltc_util import make_utxo
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from test_framework.script_util import DUMMY_P2WPKH_SCRIPT
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class LtcReplaceByFeeTest(BitcoinTestFramework):
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def set_test_params(self):
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self.num_nodes = 2
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self.extra_args = [
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["-acceptnonstdtxn=1"],
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["-acceptnonstdtxn=1", "-mempoolreplacement=1"]
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]
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self.supports_cli = False
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def skip_test_if_missing_module(self):
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self.skip_if_no_wallet()
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def run_test(self):
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# Leave IBD
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self.nodes[0].generate(1)
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self.test_rbf_flag()
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def test_rbf_flag(self):
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non_rbf_node = self.nodes[0]
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rbf_node = self.nodes[1]
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#
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# Create a non-opting in transaction
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#
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tx0_outpoint = make_utxo(self.nodes[0], int(1.1*COIN))
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tx1a = CTransaction()
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tx1a.vin = [CTxIn(tx0_outpoint, nSequence=0xffffffff)]
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tx1a.vout = [CTxOut(1 * COIN, DUMMY_P2WPKH_SCRIPT)]
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tx1a_hex = tx1a.serialize().hex()
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tx1a_txid = self.nodes[0].sendrawtransaction(tx1a_hex, 0)
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assert_equal(self.nodes[0].getmempoolentry(tx1a_txid)['bip125-replaceable'], False)
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#
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# Create a 2nd non-opting in transaction
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#
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tx1_outpoint = make_utxo(self.nodes[0], int(1.1*COIN))
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tx2a = CTransaction()
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tx2a.vin = [CTxIn(tx1_outpoint, nSequence=0xfffffffe)]
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tx2a.vout = [CTxOut(1 * COIN, DUMMY_P2WPKH_SCRIPT)]
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tx2a_hex = tx2a.serialize().hex()
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tx2a_txid = self.nodes[0].sendrawtransaction(tx2a_hex, 0)
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assert_equal(self.nodes[0].getmempoolentry(tx2a_txid)['bip125-replaceable'], False)
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# Now create a new transaction that spends from tx1a and tx2a
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# opt-in on one of the inputs
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tx1a_txid = int(tx1a_txid, 16)
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tx2a_txid = int(tx2a_txid, 16)
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tx3a = CTransaction()
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tx3a.vin = [CTxIn(COutPoint(tx1a_txid, 0), nSequence=0xffffffff),
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CTxIn(COutPoint(tx2a_txid, 0), nSequence=0xfffffffd)]
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tx3a.vout = [CTxOut(int(0.9*COIN), CScript([b'c'])), CTxOut(int(0.9*COIN), CScript([b'd']))]
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tx3a_hex = tx3a.serialize().hex()
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tx3a_txid = self.nodes[0].sendrawtransaction(tx3a_hex, 0)
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self.sync_all()
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# This transaction is shown as replaceable
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assert_equal(self.nodes[0].getmempoolentry(tx3a_txid)['bip125-replaceable'], True)
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tx3b = CTransaction()
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tx3b.vin = [CTxIn(COutPoint(tx1a_txid, 0), nSequence=0)]
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tx3b.vout = [CTxOut(int(0.5 * COIN), DUMMY_P2WPKH_SCRIPT)]
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tx3b_hex = tx3b.serialize().hex()
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# Transaction should not be replaceable on non-RBF node
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assert_raises_rpc_error(-26, "txn-mempool-conflict", non_rbf_node.sendrawtransaction, tx3b_hex, 0)
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# Transaction should be replaceable on either input on RBF node
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rbf_node.sendrawtransaction(tx3b_hex, 0)
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tx3c = CTransaction()
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tx3c.vin = [CTxIn(COutPoint(tx2a_txid, 0), nSequence=0)]
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tx3c.vout = [CTxOut(int(0.5 * COIN), DUMMY_P2WPKH_SCRIPT)]
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tx3c_hex = tx3c.serialize().hex()
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# If tx3b was accepted, tx3c won't look like a replacement,
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# but make sure it is accepted anyway
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rbf_node.sendrawtransaction(tx3c_hex, 0)
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if __name__ == '__main__':
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LtcReplaceByFeeTest().main()
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