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

#!/usr/bin/env python3# Copyright (c) 2015-2019 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 the preciousblock RPC."""from test_framework.test_framework import BitcoinTestFrameworkfrom test_framework.util import (    assert_equal,)def unidirectional_node_sync_via_rpc(node_src, node_dest):    blocks_to_copy = []    blockhash = node_src.getbestblockhash()    while True:        try:            assert len(node_dest.getblock(blockhash, False)) > 0            break        except:            blocks_to_copy.append(blockhash)            blockhash = node_src.getblockheader(blockhash, True)['previousblockhash']    blocks_to_copy.reverse()    for blockhash in blocks_to_copy:        blockdata = node_src.getblock(blockhash, False)        assert node_dest.submitblock(blockdata) in (None, 'inconclusive')def node_sync_via_rpc(nodes):    for node_src in nodes:        for node_dest in nodes:            if node_src is node_dest:                continue            unidirectional_node_sync_via_rpc(node_src, node_dest)class PreciousTest(BitcoinTestFramework):    def set_test_params(self):        self.setup_clean_chain = True        self.num_nodes = 3        self.supports_cli = False    def setup_network(self):        self.setup_nodes()    def run_test(self):        self.log.info("Ensure submitblock can in principle reorg to a competing chain")        gen_address = lambda i: self.nodes[i].get_deterministic_priv_key().address  # A non-wallet address to mine to        self.nodes[0].generatetoaddress(1, gen_address(0))        assert_equal(self.nodes[0].getblockcount(), 1)        hashZ = self.nodes[1].generatetoaddress(2, gen_address(1))[-1]        assert_equal(self.nodes[1].getblockcount(), 2)        node_sync_via_rpc(self.nodes[0:3])        assert_equal(self.nodes[0].getbestblockhash(), hashZ)        self.log.info("Mine blocks A-B-C on Node 0")        hashC = self.nodes[0].generatetoaddress(3, gen_address(0))[-1]        assert_equal(self.nodes[0].getblockcount(), 5)        self.log.info("Mine competing blocks E-F-G on Node 1")        hashG = self.nodes[1].generatetoaddress(3, gen_address(1))[-1]        assert_equal(self.nodes[1].getblockcount(), 5)        assert hashC != hashG        self.log.info("Connect nodes and check no reorg occurs")        # Submit competing blocks via RPC so any reorg should occur before we proceed (no way to wait on inaction for p2p sync)        node_sync_via_rpc(self.nodes[0:2])        self.connect_nodes(0, 1)        assert_equal(self.nodes[0].getbestblockhash(), hashC)        assert_equal(self.nodes[1].getbestblockhash(), hashG)        self.log.info("Make Node0 prefer block G")        self.nodes[0].preciousblock(hashG)        assert_equal(self.nodes[0].getbestblockhash(), hashG)        self.log.info("Make Node0 prefer block C again")        self.nodes[0].preciousblock(hashC)        assert_equal(self.nodes[0].getbestblockhash(), hashC)        self.log.info("Make Node1 prefer block C")        self.nodes[1].preciousblock(hashC)        self.sync_blocks(self.nodes[0:2])  # wait because node 1 may not have downloaded hashC        assert_equal(self.nodes[1].getbestblockhash(), hashC)        self.log.info("Make Node1 prefer block G again")        self.nodes[1].preciousblock(hashG)        assert_equal(self.nodes[1].getbestblockhash(), hashG)        self.log.info("Make Node0 prefer block G again")        self.nodes[0].preciousblock(hashG)        assert_equal(self.nodes[0].getbestblockhash(), hashG)        self.log.info("Make Node1 prefer block C again")        self.nodes[1].preciousblock(hashC)        assert_equal(self.nodes[1].getbestblockhash(), hashC)        self.log.info("Mine another block (E-F-G-)H on Node 0 and reorg Node 1")        self.nodes[0].generatetoaddress(1, gen_address(0))        assert_equal(self.nodes[0].getblockcount(), 6)        self.sync_blocks(self.nodes[0:2])        hashH = self.nodes[0].getbestblockhash()        assert_equal(self.nodes[1].getbestblockhash(), hashH)        self.log.info("Node1 should not be able to prefer block C anymore")        self.nodes[1].preciousblock(hashC)        assert_equal(self.nodes[1].getbestblockhash(), hashH)        self.log.info("Mine competing blocks I-J-K-L on Node 2")        self.nodes[2].generatetoaddress(4, gen_address(2))        assert_equal(self.nodes[2].getblockcount(), 6)        hashL = self.nodes[2].getbestblockhash()        self.log.info("Connect nodes and check no reorg occurs")        node_sync_via_rpc(self.nodes[1:3])        self.connect_nodes(1, 2)        self.connect_nodes(0, 2)        assert_equal(self.nodes[0].getbestblockhash(), hashH)        assert_equal(self.nodes[1].getbestblockhash(), hashH)        assert_equal(self.nodes[2].getbestblockhash(), hashL)        self.log.info("Make Node1 prefer block L")        self.nodes[1].preciousblock(hashL)        assert_equal(self.nodes[1].getbestblockhash(), hashL)        self.log.info("Make Node2 prefer block H")        self.nodes[2].preciousblock(hashH)        assert_equal(self.nodes[2].getbestblockhash(), hashH)if __name__ == '__main__':    PreciousTest().main()