#!/usr/bin/env python3 # Copyright (c) 2016-2022 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 NULLDUMMY softfork. Connect to a single node. Generate 2 blocks (save the coinbases for later). Generate COINBASE_MATURITY (CB) more blocks to ensure the coinbases are mature. [Policy/Consensus] Check that NULLDUMMY compliant transactions are accepted in block CB + 3. [Policy] Check that non-NULLDUMMY transactions are rejected before activation. [Consensus] Check that the new NULLDUMMY rules are not enforced on block CB + 4. [Policy/Consensus] Check that the new NULLDUMMY rules are enforced on block CB + 5. """ import time from test_framework.address import address_to_scriptpubkey from test_framework.blocktools import ( COINBASE_MATURITY, NORMAL_GBT_REQUEST_PARAMS, add_witness_commitment, create_block, ) from test_framework.messages import ( CTransaction, tx_from_hex, ) from test_framework.script import ( OP_0, OP_TRUE, ) from test_framework.test_framework import BitcoinTestFramework from test_framework.util import ( assert_equal, assert_raises_rpc_error, ) from test_framework.wallet import getnewdestination from test_framework.wallet_util import generate_keypair NULLDUMMY_ERROR = "mandatory-script-verify-flag-failed (Dummy CHECKMULTISIG argument must be zero)" def invalidate_nulldummy_tx(tx): """Transform a NULLDUMMY compliant tx (i.e. scriptSig starts with OP_0) to be non-NULLDUMMY compliant by replacing the dummy with OP_TRUE""" assert_equal(tx.vin[0].scriptSig[0], OP_0) tx.vin[0].scriptSig = bytes([OP_TRUE]) + tx.vin[0].scriptSig[1:] tx.rehash() class NULLDUMMYTest(BitcoinTestFramework): def set_test_params(self): self.num_nodes = 1 self.setup_clean_chain = True # This script tests NULLDUMMY activation, which is part of the 'segwit' deployment, so we go through # normal segwit activation here (and don't use the default always-on behaviour). self.extra_args = [[ f'-testactivationheight=segwit@{COINBASE_MATURITY + 5}', '-addresstype=legacy', '-par=1', # Use only one script thread to get the exact reject reason for testing ]] def create_transaction(self, *, txid, input_details=None, addr, amount, privkey): input = {"txid": txid, "vout": 0} output = {addr: amount} rawtx = self.nodes[0].createrawtransaction([input], output) # Details only needed for scripthash or witness spends input = None if not input_details else [{**input, **input_details}] signedtx = self.nodes[0].signrawtransactionwithkey(rawtx, [privkey], input) return tx_from_hex(signedtx["hex"]) def run_test(self): self.privkey, self.pubkey = generate_keypair(wif=True) cms = self.nodes[0].createmultisig(1, [self.pubkey.hex()]) wms = self.nodes[0].createmultisig(1, [self.pubkey.hex()], 'p2sh-segwit') self.ms_address = cms["address"] ms_unlock_details = {"scriptPubKey": address_to_scriptpubkey(self.ms_address).hex(), "redeemScript": cms["redeemScript"]} self.wit_ms_address = wms['address'] self.coinbase_blocks = self.generate(self.nodes[0], 2) # block height = 2 coinbase_txid = [] for i in self.coinbase_blocks: coinbase_txid.append(self.nodes[0].getblock(i)['tx'][0]) self.generate(self.nodes[0], COINBASE_MATURITY) # block height = COINBASE_MATURITY + 2 self.lastblockhash = self.nodes[0].getbestblockhash() self.lastblockheight = COINBASE_MATURITY + 2 self.lastblocktime = int(time.time()) + self.lastblockheight self.log.info(f"Test 1: NULLDUMMY compliant base transactions should be accepted to mempool and mined before activation [{COINBASE_MATURITY + 3}]") test1txs = [self.create_transaction(txid=coinbase_txid[0], addr=self.ms_address, amount=49, privkey=self.nodes[0].get_deterministic_priv_key().key)] txid1 = self.nodes[0].sendrawtransaction(test1txs[0].serialize_with_witness().hex(), 0) test1txs.append(self.create_transaction(txid=txid1, input_details=ms_unlock_details, addr=self.ms_address, amount=48, privkey=self.privkey)) txid2 = self.nodes[0].sendrawtransaction(test1txs[1].serialize_with_witness().hex(), 0) test1txs.append(self.create_transaction(txid=coinbase_txid[1], addr=self.wit_ms_address, amount=49, privkey=self.nodes[0].get_deterministic_priv_key().key)) txid3 = self.nodes[0].sendrawtransaction(test1txs[2].serialize_with_witness().hex(), 0) self.block_submit(self.nodes[0], test1txs, accept=True) self.log.info("Test 2: Non-NULLDUMMY base multisig transaction should not be accepted to mempool before activation") test2tx = self.create_transaction(txid=txid2, input_details=ms_unlock_details, addr=self.ms_address, amount=47, privkey=self.privkey) invalidate_nulldummy_tx(test2tx) assert_raises_rpc_error(-26, NULLDUMMY_ERROR, self.nodes[0].sendrawtransaction, test2tx.serialize_with_witness().hex(), 0) self.log.info(f"Test 3: Non-NULLDUMMY base transactions should be accepted in a block before activation [{COINBASE_MATURITY + 4}]") self.block_submit(self.nodes[0], [test2tx], accept=True) self.log.info("Test 4: Non-NULLDUMMY base multisig transaction is invalid after activation") test4tx = self.create_transaction(txid=test2tx.hash, input_details=ms_unlock_details, addr=getnewdestination()[2], amount=46, privkey=self.privkey) test6txs = [CTransaction(test4tx)] invalidate_nulldummy_tx(test4tx) assert_raises_rpc_error(-26, NULLDUMMY_ERROR, self.nodes[0].sendrawtransaction, test4tx.serialize_with_witness().hex(), 0) self.block_submit(self.nodes[0], [test4tx], accept=False) self.log.info("Test 5: Non-NULLDUMMY P2WSH multisig transaction invalid after activation") test5tx = self.create_transaction(txid=txid3, input_details={"scriptPubKey": test1txs[2].vout[0].scriptPubKey.hex(), "amount": 49, "witnessScript": wms["redeemScript"]}, addr=getnewdestination(address_type='p2sh-segwit')[2], amount=48, privkey=self.privkey) test6txs.append(CTransaction(test5tx)) test5tx.wit.vtxinwit[0].scriptWitness.stack[0] = b'\x01' assert_raises_rpc_error(-26, NULLDUMMY_ERROR, self.nodes[0].sendrawtransaction, test5tx.serialize_with_witness().hex(), 0) self.block_submit(self.nodes[0], [test5tx], with_witness=True, accept=False) self.log.info(f"Test 6: NULLDUMMY compliant base/witness transactions should be accepted to mempool and in block after activation [{COINBASE_MATURITY + 5}]") for i in test6txs: self.nodes[0].sendrawtransaction(i.serialize_with_witness().hex(), 0) self.block_submit(self.nodes[0], test6txs, with_witness=True, accept=True) def block_submit(self, node, txs, *, with_witness=False, accept): tmpl = node.getblocktemplate(NORMAL_GBT_REQUEST_PARAMS) assert_equal(tmpl['previousblockhash'], self.lastblockhash) assert_equal(tmpl['height'], self.lastblockheight + 1) block = create_block(tmpl=tmpl, ntime=self.lastblocktime + 1, txlist=txs) if with_witness: add_witness_commitment(block) block.solve() assert_equal(None if accept else NULLDUMMY_ERROR, node.submitblock(block.serialize().hex())) if accept: assert_equal(node.getbestblockhash(), block.hash) self.lastblockhash = block.hash self.lastblocktime += 1 self.lastblockheight += 1 else: assert_equal(node.getbestblockhash(), self.lastblockhash) if __name__ == '__main__': NULLDUMMYTest(__file__).main()