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119 lines
4.9 KiB
119 lines
4.9 KiB
#!/usr/bin/env python3 |
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# Copyright (c) 2015-2016 The Bitcoin 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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# |
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# Test PreciousBlock code |
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# |
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from test_framework.test_framework import BitcoinTestFramework |
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from test_framework.util import ( |
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assert_equal, |
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connect_nodes_bi, |
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sync_chain, |
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sync_blocks, |
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) |
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def unidirectional_node_sync_via_rpc(node_src, node_dest): |
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blocks_to_copy = [] |
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blockhash = node_src.getbestblockhash() |
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while True: |
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try: |
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assert(len(node_dest.getblock(blockhash, False)) > 0) |
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break |
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except: |
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blocks_to_copy.append(blockhash) |
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blockhash = node_src.getblockheader(blockhash, True)['previousblockhash'] |
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blocks_to_copy.reverse() |
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for blockhash in blocks_to_copy: |
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blockdata = node_src.getblock(blockhash, False) |
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assert(node_dest.submitblock(blockdata) in (None, 'inconclusive')) |
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def node_sync_via_rpc(nodes): |
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for node_src in nodes: |
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for node_dest in nodes: |
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if node_src is node_dest: |
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continue |
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unidirectional_node_sync_via_rpc(node_src, node_dest) |
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class PreciousTest(BitcoinTestFramework): |
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def __init__(self): |
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super().__init__() |
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self.setup_clean_chain = True |
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self.num_nodes = 3 |
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self.extra_args = [["-debug"]] * self.num_nodes |
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def setup_network(self): |
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self.nodes = self.setup_nodes() |
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def run_test(self): |
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print("Ensure submitblock can in principle reorg to a competing chain") |
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self.nodes[0].generate(1) |
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assert_equal(self.nodes[0].getblockcount(), 1) |
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(hashY, hashZ) = self.nodes[1].generate(2) |
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assert_equal(self.nodes[1].getblockcount(), 2) |
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node_sync_via_rpc(self.nodes[0:3]) |
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assert_equal(self.nodes[0].getbestblockhash(), hashZ) |
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print("Mine blocks A-B-C on Node 0") |
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(hashA, hashB, hashC) = self.nodes[0].generate(3) |
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assert_equal(self.nodes[0].getblockcount(), 5) |
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print("Mine competing blocks E-F-G on Node 1") |
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(hashE, hashF, hashG) = self.nodes[1].generate(3) |
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assert_equal(self.nodes[1].getblockcount(), 5) |
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assert(hashC != hashG) |
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print("Connect nodes and check no reorg occurs") |
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# Submit competing blocks via RPC so any reorg should occur before we proceed (no way to wait on inaction for p2p sync) |
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node_sync_via_rpc(self.nodes[0:2]) |
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connect_nodes_bi(self.nodes,0,1) |
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assert_equal(self.nodes[0].getbestblockhash(), hashC) |
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assert_equal(self.nodes[1].getbestblockhash(), hashG) |
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print("Make Node0 prefer block G") |
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self.nodes[0].preciousblock(hashG) |
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assert_equal(self.nodes[0].getbestblockhash(), hashG) |
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print("Make Node0 prefer block C again") |
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self.nodes[0].preciousblock(hashC) |
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assert_equal(self.nodes[0].getbestblockhash(), hashC) |
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print("Make Node1 prefer block C") |
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self.nodes[1].preciousblock(hashC) |
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sync_chain(self.nodes[0:2]) # wait because node 1 may not have downloaded hashC |
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assert_equal(self.nodes[1].getbestblockhash(), hashC) |
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print("Make Node1 prefer block G again") |
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self.nodes[1].preciousblock(hashG) |
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assert_equal(self.nodes[1].getbestblockhash(), hashG) |
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print("Make Node0 prefer block G again") |
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self.nodes[0].preciousblock(hashG) |
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assert_equal(self.nodes[0].getbestblockhash(), hashG) |
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print("Make Node1 prefer block C again") |
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self.nodes[1].preciousblock(hashC) |
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assert_equal(self.nodes[1].getbestblockhash(), hashC) |
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print("Mine another block (E-F-G-)H on Node 0 and reorg Node 1") |
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self.nodes[0].generate(1) |
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assert_equal(self.nodes[0].getblockcount(), 6) |
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sync_blocks(self.nodes[0:2]) |
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hashH = self.nodes[0].getbestblockhash() |
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assert_equal(self.nodes[1].getbestblockhash(), hashH) |
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print("Node1 should not be able to prefer block C anymore") |
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self.nodes[1].preciousblock(hashC) |
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assert_equal(self.nodes[1].getbestblockhash(), hashH) |
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print("Mine competing blocks I-J-K-L on Node 2") |
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self.nodes[2].generate(4) |
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assert_equal(self.nodes[2].getblockcount(), 6) |
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hashL = self.nodes[2].getbestblockhash() |
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print("Connect nodes and check no reorg occurs") |
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node_sync_via_rpc(self.nodes[1:3]) |
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connect_nodes_bi(self.nodes,1,2) |
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connect_nodes_bi(self.nodes,0,2) |
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assert_equal(self.nodes[0].getbestblockhash(), hashH) |
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assert_equal(self.nodes[1].getbestblockhash(), hashH) |
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assert_equal(self.nodes[2].getbestblockhash(), hashL) |
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print("Make Node1 prefer block L") |
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self.nodes[1].preciousblock(hashL) |
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assert_equal(self.nodes[1].getbestblockhash(), hashL) |
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print("Make Node2 prefer block H") |
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self.nodes[2].preciousblock(hashH) |
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assert_equal(self.nodes[2].getbestblockhash(), hashH) |
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if __name__ == '__main__': |
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PreciousTest().main()
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