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0bd53d913c
This test would fail to mark the chain tip as "invalid" instead of "headers-only" without the previous commit marking the headers as BLOCK_FAILED_CHILD.
94 lines
3.5 KiB
Python
Executable file
94 lines
3.5 KiB
Python
Executable file
#!/usr/bin/env python3
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# Copyright (c) 2014-2021 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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"""Test the getchaintips RPC.
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- introduce a network split
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- work on chains of different lengths
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- join the network together again
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- verify that getchaintips now returns two chain tips.
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"""
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from test_framework.blocktools import (
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create_block,
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create_coinbase,
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)
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from test_framework.test_framework import BitcoinTestFramework
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from test_framework.util import assert_equal
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class GetChainTipsTest (BitcoinTestFramework):
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def set_test_params(self):
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self.num_nodes = 4
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def run_test(self):
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self.log.info("Test getchaintips behavior with two chains of different length")
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tips = self.nodes[0].getchaintips()
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assert_equal(len(tips), 1)
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assert_equal(tips[0]['branchlen'], 0)
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assert_equal(tips[0]['height'], 200)
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assert_equal(tips[0]['status'], 'active')
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self.log.info("Split the network and build two chains of different lengths.")
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self.split_network()
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self.generate(self.nodes[0], 10, sync_fun=lambda: self.sync_all(self.nodes[:2]))
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self.generate(self.nodes[2], 20, sync_fun=lambda: self.sync_all(self.nodes[2:]))
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tips = self.nodes[1].getchaintips()
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assert_equal(len(tips), 1)
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shortTip = tips[0]
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assert_equal(shortTip['branchlen'], 0)
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assert_equal(shortTip['height'], 210)
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assert_equal(tips[0]['status'], 'active')
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tips = self.nodes[3].getchaintips()
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assert_equal(len(tips), 1)
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longTip = tips[0]
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assert_equal(longTip['branchlen'], 0)
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assert_equal(longTip['height'], 220)
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assert_equal(tips[0]['status'], 'active')
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self.log.info("Join the network halves and check that we now have two tips")
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# (at least at the nodes that previously had the short chain).
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self.join_network()
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tips = self.nodes[0].getchaintips()
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assert_equal(len(tips), 2)
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assert_equal(tips[0], longTip)
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assert_equal(tips[1]['branchlen'], 10)
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assert_equal(tips[1]['status'], 'valid-fork')
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tips[1]['branchlen'] = 0
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tips[1]['status'] = 'active'
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assert_equal(tips[1], shortTip)
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self.log.info("Test getchaintips behavior with invalid blocks")
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self.disconnect_nodes(0, 1)
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n0 = self.nodes[0]
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tip = int(n0.getbestblockhash(), 16)
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start_height = self.nodes[0].getblockcount()
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# Create invalid block (too high coinbase)
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block_time = n0.getblock(n0.getbestblockhash())['time'] + 1
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invalid_block = create_block(tip, create_coinbase(start_height+1, nValue=100), block_time)
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invalid_block.solve()
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block_time += 1
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block2 = create_block(invalid_block.sha256, create_coinbase(2), block_time, version=4)
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block2.solve()
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self.log.info("Submit headers-only chain")
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n0.submitheader(invalid_block.serialize().hex())
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n0.submitheader(block2.serialize().hex())
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tips = n0.getchaintips()
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assert_equal(len(tips), 3)
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assert_equal(tips[0]['status'], 'headers-only')
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self.log.info("Submit invalid block that invalidates the headers-only chain")
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n0.submitblock(invalid_block.serialize().hex())
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tips = n0.getchaintips()
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assert_equal(len(tips), 3)
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assert_equal(tips[0]['status'], 'invalid')
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if __name__ == '__main__':
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GetChainTipsTest(__file__).main()
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