feature_prune_stale_fork.py raw

   1  #!/usr/bin/env python3
   2  # Copyright (c) 2026-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 node restart with a pruned stale-fork block whose parent has no transactions."""
   6  
   7  from test_framework.blocktools import create_empty_fork
   8  from test_framework.test_framework import BitcoinTestFramework
   9  from test_framework.util import assert_equal, assert_raises_rpc_error
  10  
  11  
  12  class FeaturePruneStaleForkTest(BitcoinTestFramework):
  13      def set_test_params(self):
  14          self.num_nodes = 1
  15          self.extra_args = [["-prune=1", "-fastprune"]]
  16  
  17      def run_test(self):
  18          node = self.nodes[0]
  19  
  20          self.log.info("Create a 2-block stale fork: parent has no transactions, child has transactions")
  21          [side_parent, side_child] = create_empty_fork(node, 2)
  22  
  23          node.submitheader(side_parent.serialize().hex())
  24          node.submitblock(side_child.serialize().hex())
  25          assert_equal(node.getblockheader(side_parent.hash_hex)["nTx"], 0)
  26          assert_equal(node.getblockheader(side_child.hash_hex)["nTx"], 1)
  27  
  28          self.log.info("Advance and prune so the stale-fork child's block data is removed from disk")
  29          self.generate(node, 500)
  30          node.pruneblockchain(node.getblockcount() - 100)
  31          assert_raises_rpc_error(-1, "Block not available (pruned data)", node.getblock, side_child.hash_hex)
  32  
  33          self.log.info("Restart and mine; node must reload cleanly after the stale-fork child was pruned")
  34          self.restart_node(0)
  35          self.generate(node, 1)
  36  
  37  
  38  if __name__ == '__main__':
  39      FeaturePruneStaleForkTest(__file__).main()
  40