#!/usr/bin/env python3 # Copyright (c) 2015-2021 The Dash Core developers # Distributed under the MIT software license, see the accompanying # file COPYING or http://www.opensource.org/licenses/mit-license.php. ''' feature_llmq_chainlocks.py Checks LLMQs based ChainLocks ''' import time from test_framework.test_framework import DashTestFramework from test_framework.util import connect_nodes, isolate_node, reconnect_isolated_node class LLMQChainLocksTest(DashTestFramework): def set_test_params(self): self.set_dash_test_params(4, 3, fast_dip3_enforcement=True) def run_test(self): # Connect all nodes to node1 so that we always have the whole network connected # Otherwise only masternode connections will be established between nodes, which won't propagate TXs/blocks # Usually node0 is the one that does this, but in this test we isolate it multiple times for i in range(len(self.nodes)): if i != 1: connect_nodes(self.nodes[i], 1) self.activate_dip8() self.nodes[0].spork("SPORK_17_QUORUM_DKG_ENABLED", 0) self.wait_for_sporks_same() self.log.info("Mining 4 quorums") for i in range(4): self.mine_quorum() self.log.info("Mine single block, wait for chainlock") self.nodes[0].generate(1) self.wait_for_chainlocked_block_all_nodes(self.nodes[0].getbestblockhash()) self.log.info("Mine many blocks, wait for chainlock") self.nodes[0].generate(20) # We need more time here due to 20 blocks being generated at once self.wait_for_chainlocked_block_all_nodes(self.nodes[0].getbestblockhash(), timeout=30) self.log.info("Assert that all blocks up until the tip are chainlocked") for h in range(1, self.nodes[0].getblockcount()): block = self.nodes[0].getblock(self.nodes[0].getblockhash(h)) assert(block['chainlock']) self.log.info("Isolate node, mine on another, and reconnect") isolate_node(self.nodes[0]) node0_mining_addr = self.nodes[0].getnewaddress() node0_tip = self.nodes[0].getbestblockhash() self.nodes[1].generatetoaddress(5, node0_mining_addr) self.wait_for_chainlocked_block(self.nodes[1], self.nodes[1].getbestblockhash()) assert(self.nodes[0].getbestblockhash() == node0_tip) reconnect_isolated_node(self.nodes[0], 1) self.nodes[1].generatetoaddress(1, node0_mining_addr) self.wait_for_chainlocked_block_all_nodes(self.nodes[1].getbestblockhash()) self.log.info("Isolate node, mine on both parts of the network, and reconnect") isolate_node(self.nodes[0]) bad_tip = self.nodes[0].generate(5)[-1] self.nodes[1].generatetoaddress(1, node0_mining_addr) good_tip = self.nodes[1].getbestblockhash() self.wait_for_chainlocked_block(self.nodes[1], good_tip) assert(not self.nodes[0].getblock(self.nodes[0].getbestblockhash())["chainlock"]) reconnect_isolated_node(self.nodes[0], 1) self.nodes[1].generatetoaddress(1, node0_mining_addr) self.wait_for_chainlocked_block_all_nodes(self.nodes[1].getbestblockhash()) assert(self.nodes[0].getblock(self.nodes[0].getbestblockhash())["previousblockhash"] == good_tip) assert(self.nodes[1].getblock(self.nodes[1].getbestblockhash())["previousblockhash"] == good_tip) self.log.info("The tip mined while this node was isolated should be marked conflicting now") found = False for tip in self.nodes[0].getchaintips(2): if tip["hash"] == bad_tip: assert(tip["status"] == "conflicting") found = True break assert(found) self.log.info("Keep node connected and let it try to reorg the chain") good_tip = self.nodes[0].getbestblockhash() self.log.info("Restart it so that it forgets all the chainlock messages from the past") self.stop_node(0) self.start_node(0) connect_nodes(self.nodes[0], 1) assert(self.nodes[0].getbestblockhash() == good_tip) self.nodes[0].invalidateblock(good_tip) self.log.info("Now try to reorg the chain") self.nodes[0].generate(2) time.sleep(6) assert(self.nodes[1].getbestblockhash() == good_tip) bad_tip = self.nodes[0].generate(2)[-1] time.sleep(6) assert(self.nodes[0].getbestblockhash() == bad_tip) assert(self.nodes[1].getbestblockhash() == good_tip) self.log.info("Now let the node which is on the wrong chain reorg back to the locked chain") self.nodes[0].reconsiderblock(good_tip) assert(self.nodes[0].getbestblockhash() != good_tip) good_fork = good_tip good_tip = self.nodes[1].generatetoaddress(1, node0_mining_addr)[-1] # this should mark bad_tip as conflicting self.wait_for_chainlocked_block_all_nodes(good_tip) assert(self.nodes[0].getbestblockhash() == good_tip) found = False for tip in self.nodes[0].getchaintips(2): if tip["hash"] == bad_tip: assert(tip["status"] == "conflicting") found = True break assert(found) self.log.info("Should switch to the best non-conflicting tip (not to the most work chain) on restart") assert(int(self.nodes[0].getblock(bad_tip)["chainwork"], 16) > int(self.nodes[1].getblock(good_tip)["chainwork"], 16)) self.stop_node(0) self.start_node(0) self.nodes[0].invalidateblock(good_fork) self.stop_node(0) self.start_node(0) time.sleep(1) assert(self.nodes[0].getbestblockhash() == good_tip) self.log.info("Isolate a node and let it create some transactions which won't get IS locked") isolate_node(self.nodes[0]) txs = [] for i in range(3): txs.append(self.nodes[0].sendtoaddress(self.nodes[0].getnewaddress(), 1)) txs += self.create_chained_txs(self.nodes[0], 1) self.log.info("Assert that after block generation these TXs are NOT included (as they are \"unsafe\")") node0_tip = self.nodes[0].generate(1)[-1] for txid in txs: tx = self.nodes[0].getrawtransaction(txid, 1) assert("confirmations" not in tx) time.sleep(1) node0_tip_block = self.nodes[0].getblock(node0_tip) assert(not node0_tip_block["chainlock"]) assert(node0_tip_block["previousblockhash"] == good_tip) self.log.info("Disable LLMQ based InstantSend for a very short time (this never gets propagated to other nodes)") self.nodes[0].spork("SPORK_2_INSTANTSEND_ENABLED", 4070908800) self.log.info("Now the TXs should be included") self.nodes[0].generate(1) self.nodes[0].spork("SPORK_2_INSTANTSEND_ENABLED", 0) self.log.info("Assert that TXs got included now") for txid in txs: tx = self.nodes[0].getrawtransaction(txid, 1) assert("confirmations" in tx and tx["confirmations"] > 0) # Enable network on first node again, which will cause the blocks to propagate and IS locks to happen retroactively # for the mined TXs, which will then allow the network to create a CLSIG self.log.info("Reenable network on first node and wait for chainlock") reconnect_isolated_node(self.nodes[0], 1) self.wait_for_chainlocked_block(self.nodes[0], self.nodes[0].getbestblockhash(), timeout=30) def create_chained_txs(self, node, amount): txid = node.sendtoaddress(node.getnewaddress(), amount) tx = node.getrawtransaction(txid, 1) inputs = [] valueIn = 0 for txout in tx["vout"]: inputs.append({"txid": txid, "vout": txout["n"]}) valueIn += txout["value"] outputs = { node.getnewaddress(): round(float(valueIn) - 0.0001, 6) } rawtx = node.createrawtransaction(inputs, outputs) rawtx = node.signrawtransactionwithwallet(rawtx) rawtxid = node.sendrawtransaction(rawtx["hex"]) return [txid, rawtxid] if __name__ == '__main__': LLMQChainLocksTest().main()