text: #!/usr/bin/env python3
  # Copyright (c) 2014-2018 The Pocketcoin Core developers
  # Distributed under the MIT software license, see the accompanying
  # file COPYING or http://www.opensource.org/licenses/mit-license.php.
  """Test resurrection of mined transactions when the blockchain is re-organized."""
  
  from test_framework.blocktools import create_raw_transaction
  from test_framework.test_framework import PocketcoinTestFramework
  from test_framework.util import assert_equal
  
  
  class MempoolCoinbaseTest(PocketcoinTestFramework):
      def set_test_params(self):
          self.num_nodes = 1
  
      def skip_test_if_missing_module(self):
          self.skip_if_no_wallet()
  
      def run_test(self):
          node0_address = self.nodes[0].getnewaddress()
          # Spend block 1/2/3's coinbase transactions
          # Mine a block.
          # Create three more transactions, spending the spends
          # Mine another block.
          # ... make sure all the transactions are confirmed
          # Invalidate both blocks
          # ... make sure all the transactions are put back in the mempool
          # Mine a new block
          # ... make sure all the transactions are confirmed again.
  
          b = [self.nodes[0].getblockhash(n) for n in range(1, 4)]
          coinbase_txids = [self.nodes[0].getblock(h)['tx'][0] for h in b]
          spends1_raw = [create_raw_transaction(self.nodes[0], txid, node0_address, amount=49.99) for txid in coinbase_txids]
          spends1_id = [self.nodes[0].sendrawtransaction(tx) for tx in spends1_raw]
  
          blocks = []
          blocks.extend(self.nodes[0].generate(1))
  
          spends2_raw = [create_raw_transaction(self.nodes[0], txid, node0_address, amount=49.98) for txid in spends1_id]
          spends2_id = [self.nodes[0].sendrawtransaction(tx) for tx in spends2_raw]
  
          blocks.extend(self.nodes[0].generate(1))
  
          # mempool should be empty, all txns confirmed
          assert_equal(set(self.nodes[0].getrawmempool()), set())
          for txid in spends1_id+spends2_id:
              tx = self.nodes[0].gettransaction(txid)
              assert(tx["confirmations"] > 0)
  
          # Use invalidateblock to re-org back; all transactions should
          # end up unconfirmed and back in the mempool
          for node in self.nodes:
              node.invalidateblock(blocks[0])
  
          # mempool should be empty, all txns confirmed
          assert_equal(set(self.nodes[0].getrawmempool()), set(spends1_id+spends2_id))
          for txid in spends1_id+spends2_id:
              tx = self.nodes[0].gettransaction(txid)
              assert(tx["confirmations"] == 0)
  
          # Generate another block, they should all get mined
          self.nodes[0].generate(1)
          # mempool should be empty, all txns confirmed
          assert_equal(set(self.nodes[0].getrawmempool()), set())
          for txid in spends1_id+spends2_id:
              tx = self.nodes[0].gettransaction(txid)
              assert(tx["confirmations"] > 0)
  
  
  if __name__ == '__main__':
      MempoolCoinbaseTest().main()
  