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62 lines
2.2 KiB
62 lines
2.2 KiB
#!/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.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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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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# 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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# 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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if __name__ == '__main__':
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GetChainTipsTest ().main ()
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