#!/usr/bin/env python3 # Copyright (c) 2015-2020 The Dash Core developers # Distributed under the MIT software license, see the accompanying # file COPYING or http://www.opensource.org/licenses/mit-license.php. import time from decimal import Decimal from test_framework.blocktools import get_masternode_payment, create_coinbase, create_block from test_framework.mininode import * from test_framework.test_framework import DashTestFramework from test_framework.util import assert_equal, assert_raises_rpc_error, get_bip9_status ''' feature_llmq_is_cl_conflicts.py Checks conflict handling between ChainLocks and InstantSend ''' class TestP2PConn(P2PInterface): def __init__(self): super().__init__() self.clsigs = {} self.islocks = {} def send_clsig(self, clsig): hash = uint256_from_str(hash256(clsig.serialize())) self.clsigs[hash] = clsig inv = msg_inv([CInv(29, hash)]) self.send_message(inv) def send_islock(self, islock): hash = uint256_from_str(hash256(islock.serialize())) self.islocks[hash] = islock inv = msg_inv([CInv(30, hash)]) self.send_message(inv) def on_getdata(self, message): for inv in message.inv: if inv.hash in self.clsigs: self.send_message(self.clsigs[inv.hash]) if inv.hash in self.islocks: self.send_message(self.islocks[inv.hash]) class LLMQ_IS_CL_Conflicts(DashTestFramework): def set_test_params(self): self.set_dash_test_params(4, 3, fast_dip3_enforcement=True) #disable_mocktime() def run_test(self): self.activate_dip8() self.test_node = self.nodes[0].add_p2p_connection(TestP2PConn()) network_thread_start() self.nodes[0].p2p.wait_for_verack() self.nodes[0].spork("SPORK_17_QUORUM_DKG_ENABLED", 0) self.wait_for_sporks_same() self.mine_quorum() # mine single block, wait for chainlock self.nodes[0].generate(1) self.wait_for_chainlocked_block_all_nodes(self.nodes[0].getbestblockhash()) self.test_chainlock_overrides_islock(False) self.test_chainlock_overrides_islock(True, False) self.test_chainlock_overrides_islock(True, True) self.test_islock_overrides_nonchainlock() def test_chainlock_overrides_islock(self, test_block_conflict, mine_confllicting=False): if not test_block_conflict: assert not mine_confllicting # create three raw TXs, they will conflict with each other rawtx1 = self.create_raw_tx(self.nodes[0], self.nodes[0], 1, 1, 100)['hex'] rawtx2 = self.create_raw_tx(self.nodes[0], self.nodes[0], 1, 1, 100)['hex'] rawtx1_obj = FromHex(CTransaction(), rawtx1) rawtx2_obj = FromHex(CTransaction(), rawtx2) rawtx1_txid = self.nodes[0].sendrawtransaction(rawtx1) rawtx2_txid = encode(hash256(hex_str_to_bytes(rawtx2))[::-1], 'hex_codec').decode('ascii') # Create a chained TX on top of tx1 inputs = [] n = 0 for out in rawtx1_obj.vout: if out.nValue == 100000000: inputs.append({"txid": rawtx1_txid, "vout": n}) n += 1 rawtx4 = self.nodes[0].createrawtransaction(inputs, {self.nodes[0].getnewaddress(): 0.999}) rawtx4 = self.nodes[0].signrawtransactionwithwallet(rawtx4)['hex'] rawtx4_txid = self.nodes[0].sendrawtransaction(rawtx4) # wait for transactions to propagate self.sync_mempools() for node in self.nodes: self.wait_for_instantlock(rawtx1_txid, node) self.wait_for_instantlock(rawtx4_txid, node) block = self.create_block(self.nodes[0], [rawtx2_obj]) if test_block_conflict: # The block shouldn't be accepted/connected but it should be known to node 0 now submit_result = self.nodes[0].submitblock(ToHex(block)) assert(submit_result == "conflict-tx-lock") cl = self.create_chainlock(self.nodes[0].getblockcount() + 1, block) if mine_confllicting: islock_tip = self.nodes[0].generate(1)[-1] self.test_node.send_clsig(cl) for node in self.nodes: self.wait_for_best_chainlock(node, block.hash) self.sync_blocks() if mine_confllicting: # The tip with IS-locked txes should be marked conflicting now found1 = False found2 = False for tip in self.nodes[0].getchaintips(2): if tip["hash"] == islock_tip: assert tip["status"] == "conflicting" found1 = True elif tip["hash"] == block.hash: assert tip["status"] == "active" found2 = True assert found1 and found2 # At this point all nodes should be in sync and have the same "best chainlock" submit_result = self.nodes[1].submitblock(ToHex(block)) if test_block_conflict: # Node 1 should receive the block from node 0 and should not accept it again via submitblock assert(submit_result == "duplicate") else: # The block should get accepted now, and at the same time prune the conflicting ISLOCKs assert(submit_result is None) for node in self.nodes: self.wait_for_chainlocked_block(node, block.hash) # Create a chained TX on top of tx2 inputs = [] n = 0 for out in rawtx2_obj.vout: if out.nValue == 100000000: inputs.append({"txid": rawtx2_txid, "vout": n}) n += 1 rawtx5 = self.nodes[0].createrawtransaction(inputs, {self.nodes[0].getnewaddress(): 0.999}) rawtx5 = self.nodes[0].signrawtransactionwithwallet(rawtx5)['hex'] rawtx5_txid = self.nodes[0].sendrawtransaction(rawtx5) # wait for the transaction to propagate self.sync_mempools() for node in self.nodes: self.wait_for_instantlock(rawtx5_txid, node) if mine_confllicting: # Lets verify that the ISLOCKs got pruned and conflicting txes were mined but never confirmed for node in self.nodes: rawtx = node.getrawtransaction(rawtx1_txid, True) assert not rawtx['chainlock'] assert not rawtx['instantlock'] assert not rawtx['instantlock_internal'] assert_equal(rawtx['confirmations'], 0) assert_equal(rawtx['height'], -1) rawtx = node.getrawtransaction(rawtx4_txid, True) assert not rawtx['chainlock'] assert not rawtx['instantlock'] assert not rawtx['instantlock_internal'] assert_equal(rawtx['confirmations'], 0) assert_equal(rawtx['height'], -1) rawtx = node.getrawtransaction(rawtx2_txid, True) assert rawtx['chainlock'] assert rawtx['instantlock'] assert not rawtx['instantlock_internal'] else: # Lets verify that the ISLOCKs got pruned for node in self.nodes: assert_raises_rpc_error(-5, "No such mempool or blockchain transaction", node.getrawtransaction, rawtx1_txid, True) assert_raises_rpc_error(-5, "No such mempool or blockchain transaction", node.getrawtransaction, rawtx4_txid, True) rawtx = node.getrawtransaction(rawtx2_txid, True) assert rawtx['chainlock'] assert rawtx['instantlock'] assert not rawtx['instantlock_internal'] def test_islock_overrides_nonchainlock(self): # create two raw TXs, they will conflict with each other rawtx1 = self.create_raw_tx(self.nodes[0], self.nodes[0], 1, 1, 100)['hex'] rawtx2 = self.create_raw_tx(self.nodes[0], self.nodes[0], 1, 1, 100)['hex'] rawtx1_txid = encode(hash256(hex_str_to_bytes(rawtx1))[::-1], 'hex_codec').decode('ascii') rawtx2_txid = encode(hash256(hex_str_to_bytes(rawtx2))[::-1], 'hex_codec').decode('ascii') # Create an ISLOCK but don't broadcast it yet islock = self.create_islock(rawtx2) # Stop enough MNs so that ChainLocks don't work anymore for i in range(2): self.stop_node(len(self.nodes) - 1) self.nodes.pop(len(self.nodes) - 1) self.mninfo.pop(len(self.mninfo) - 1) # Send tx1, which will later conflict with the ISLOCK self.nodes[0].sendrawtransaction(rawtx1) # fast forward 11 minutes, so that the TX is considered safe and included in the next block self.bump_mocktime(int(60 * 11)) # Mine the conflicting TX into a block good_tip = self.nodes[0].getbestblockhash() self.nodes[0].generate(2) self.sync_all() # Assert that the conflicting tx got mined and the locked TX is not valid assert(self.nodes[0].getrawtransaction(rawtx1_txid, True)['confirmations'] > 0) assert_raises_rpc_error(-25, "Missing inputs", self.nodes[0].sendrawtransaction, rawtx2) # Send the ISLOCK, which should result in the last 2 blocks to be invalidated, even though the nodes don't know # the locked transaction yet self.test_node.send_islock(islock) time.sleep(5) assert(self.nodes[0].getbestblockhash() == good_tip) assert(self.nodes[1].getbestblockhash() == good_tip) # Send the actual transaction and mine it self.nodes[0].sendrawtransaction(rawtx2) self.nodes[0].generate(1) self.sync_all() assert(self.nodes[0].getrawtransaction(rawtx2_txid, True)['confirmations'] > 0) assert(self.nodes[1].getrawtransaction(rawtx2_txid, True)['confirmations'] > 0) assert(self.nodes[0].getrawtransaction(rawtx2_txid, True)['instantlock']) assert(self.nodes[1].getrawtransaction(rawtx2_txid, True)['instantlock']) assert(self.nodes[0].getbestblockhash() != good_tip) assert(self.nodes[1].getbestblockhash() != good_tip) def create_block(self, node, vtx=[]): bt = node.getblocktemplate() height = bt['height'] tip_hash = bt['previousblockhash'] coinbasevalue = bt['coinbasevalue'] miner_address = node.getnewaddress() mn_payee = bt['masternode'][0]['payee'] # calculate fees that the block template included (we'll have to remove it from the coinbase as we won't # include the template's transactions bt_fees = 0 for tx in bt['transactions']: bt_fees += tx['fee'] new_fees = 0 for tx in vtx: in_value = 0 out_value = 0 for txin in tx.vin: txout = node.gettxout(uint256_to_string(txin.prevout.hash), txin.prevout.n, False) in_value += int(txout['value'] * COIN) for txout in tx.vout: out_value += txout.nValue new_fees += in_value - out_value # fix fees coinbasevalue -= bt_fees coinbasevalue += new_fees realloc_info = get_bip9_status(self.nodes[0], 'realloc') realloc_height = 99999999 if realloc_info['status'] == 'active': realloc_height = realloc_info['since'] mn_amount = get_masternode_payment(height, coinbasevalue, realloc_height) miner_amount = coinbasevalue - mn_amount outputs = {miner_address: str(Decimal(miner_amount) / COIN)} if mn_amount > 0: outputs[mn_payee] = str(Decimal(mn_amount) / COIN) coinbase = FromHex(CTransaction(), node.createrawtransaction([], outputs)) coinbase.vin = create_coinbase(height).vin # We can't really use this one as it would result in invalid merkle roots for masternode lists if len(bt['coinbase_payload']) != 0: cbtx = FromHex(CCbTx(version=1), bt['coinbase_payload']) coinbase.nVersion = 3 coinbase.nType = 5 # CbTx coinbase.vExtraPayload = cbtx.serialize() coinbase.calc_sha256() block = create_block(int(tip_hash, 16), coinbase, nTime=bt['curtime']) block.vtx += vtx # Add quorum commitments from template for tx in bt['transactions']: tx2 = FromHex(CTransaction(), tx['data']) if tx2.nType == 6: block.vtx.append(tx2) block.hashMerkleRoot = block.calc_merkle_root() block.solve() return block def create_chainlock(self, height, block): request_id_buf = ser_string(b"clsig") + struct.pack("