1  #!/usr/bin/env python3
 2  # Copyright (c) 2019-present The Bitcoin Core developers
 3  # Distributed under the MIT software license, see the accompanying
 4  # file COPYING or http://www.opensource.org/licenses/mit-license.php.
 5  """Test bitcoind aborts if can't disconnect a block.
 6  
 7  - Start a single node and generate 3 blocks.
 8  - Delete the undo data.
 9  - Mine a fork that requires disconnecting the tip.
10  - Verify that bitcoind AbortNode's.
11  """
12  from test_framework.test_framework import BitcoinTestFramework
13  
14  
15  class AbortNodeTest(BitcoinTestFramework):
16      def set_test_params(self):
17          self.setup_clean_chain = True
18          self.num_nodes = 2
19  
20      def setup_network(self):
21          self.setup_nodes()
22          # We'll connect the nodes later
23  
24      def run_test(self):
25          self.generate(self.nodes[0], 3, sync_fun=self.no_op)
26  
27          # Deleting the undo file will result in reorg failure
28          (self.nodes[0].blocks_path / "rev00000.dat").unlink()
29  
30          # Connecting to a node with a more work chain will trigger a reorg
31          # attempt.
32          self.generate(self.nodes[1], 3, sync_fun=self.no_op)
33          with self.nodes[0].assert_debug_log(["Failed to disconnect block"]):
34              self.connect_nodes(0, 1)
35              self.generate(self.nodes[1], 1, sync_fun=self.no_op)
36  
37              # Check that node0 aborted
38              self.log.info("Waiting for crash")
39              self.nodes[0].wait_until_stopped(timeout=5, expect_error=True, expected_stderr="Error: A fatal internal error occurred, see debug.log for details: Failed to disconnect block.")
40          self.log.info("Node crashed - now verifying restart fails")
41          self.nodes[0].assert_start_raises_init_error()
42  
43  
44  if __name__ == '__main__':
45      AbortNodeTest(__file__).main()