text: #!/usr/bin/env python3
  # Copyright (c) 2014-2019 The Bitcoin Core developers
  # Distributed under the MIT software license, see the accompanying
  # file COPYING or http://www.opensource.org/licenses/mit-license.php.
  """Test the wallet accounts properly when there are cloned transactions with malleated scriptsigs."""
  
  import io
  from test_framework.test_framework import BitcoinTestFramework
  from test_framework.util import (
      assert_equal,
      connect_nodes,
      disconnect_nodes,
  )
  from test_framework.messages import CTransaction, COIN
  from test_framework.qtumcashconfig import *
  
  class TxnMallTest(BitcoinTestFramework):
      def set_test_params(self):
          self.num_nodes = 4
  
      def skip_test_if_missing_module(self):
          self.skip_if_no_wallet()
  
      def add_options(self, parser):
          parser.add_argument("--mineblock", dest="mine_block", default=False, action="store_true",
                              help="Test double-spend of 1-confirmed transaction")
          parser.add_argument("--segwit", dest="segwit", default=False, action="store_true",
                              help="Test behaviour with SegWit txn (which should fail")
  
      def setup_network(self):
          # Start with split network:
          super(TxnMallTest, self).setup_network()
          disconnect_nodes(self.nodes[1], 2)
          disconnect_nodes(self.nodes[2], 1)
  
      def run_test(self):
          if self.options.segwit:
              output_type = "p2sh-segwit"
          else:
              output_type = "legacy"
  
          # All nodes should start with 1,250 BTC:
          starting_balance = 25*INITIAL_BLOCK_REWARD
          for i in range(4):
              assert_equal(self.nodes[i].getbalance(), starting_balance)
              self.nodes[i].getnewaddress()  # bug workaround, coins generated assigned to first getnewaddress!
  
          self.nodes[0].settxfee(.01)
  
          node0_address1 = self.nodes[0].getnewaddress(address_type=output_type)
          node0_txid1 = self.nodes[0].sendtoaddress(node0_address1, 487600)
          node0_tx1 = self.nodes[0].gettransaction(node0_txid1)
  
          node0_address2 = self.nodes[0].getnewaddress(address_type=output_type)
          node0_txid2 = self.nodes[0].sendtoaddress(node0_address2, 11600)
          node0_tx2 = self.nodes[0].gettransaction(node0_txid2)
  
          assert_equal(self.nodes[0].getbalance(),
                       starting_balance + node0_tx1["fee"] + node0_tx2["fee"])
  
          # Coins are sent to node1_address
          node1_address = self.nodes[1].getnewaddress(output_type)
  
          # Send tx1, and another transaction tx2 that won't be cloned
          txid1 = self.nodes[0].sendtoaddress(node1_address, 16000)
          txid2 = self.nodes[0].sendtoaddress(node1_address, 8000)
  
          # Construct a clone of tx1, to be malleated
          rawtx1 = self.nodes[0].getrawtransaction(txid1, 1)
          clone_inputs = [{"txid": rawtx1["vin"][0]["txid"], "vout": rawtx1["vin"][0]["vout"], "sequence": rawtx1["vin"][0]["sequence"]}]
          clone_outputs = {rawtx1["vout"][0]["scriptPubKey"]["addresses"][0]: rawtx1["vout"][0]["value"],
                           rawtx1["vout"][1]["scriptPubKey"]["addresses"][0]: rawtx1["vout"][1]["value"]}
          clone_locktime = rawtx1["locktime"]
          clone_raw = self.nodes[0].createrawtransaction(clone_inputs, clone_outputs, clone_locktime)
  
          # Use a different signature hash type to sign.  This creates an equivalent but malleated clone.
          # Don't send the clone anywhere yet
          tx1_clone = self.nodes[0].signrawtransactionwithwallet(clone_raw, None, "ALL|ANYONECANPAY")
          assert_equal(tx1_clone["complete"], True)
  
          # Have node0 mine a block, if requested:
          if (self.options.mine_block):
              self.nodes[0].generate(1)
              self.sync_blocks(self.nodes[0:2])
  
          tx1 = self.nodes[0].gettransaction(txid1)
          tx2 = self.nodes[0].gettransaction(txid2)
  
          # Node0's balance should be starting balance, plus 50BTC for another
          # matured block, minus tx1 and tx2 amounts, and minus transaction fees:
          expected = starting_balance + node0_tx1["fee"] + node0_tx2["fee"]
          if self.options.mine_block:
              expected += INITIAL_BLOCK_REWARD
          expected += tx1["amount"] + tx1["fee"]
          expected += tx2["amount"] + tx2["fee"]
          assert_equal(self.nodes[0].getbalance(), expected)
  
          if self.options.mine_block:
              assert_equal(tx1["confirmations"], 1)
              assert_equal(tx2["confirmations"], 1)
          else:
              assert_equal(tx1["confirmations"], 0)
              assert_equal(tx2["confirmations"], 0)
  
          # Send clone and its parent to miner
          self.nodes[2].sendrawtransaction(node0_tx1["hex"])
          txid1_clone = self.nodes[2].sendrawtransaction(tx1_clone["hex"])
          if self.options.segwit:
              assert_equal(txid1, txid1_clone)
              return
  
          # ... mine a block...
          self.nodes[2].generate(1)
  
          # Reconnect the split network, and sync chain:
          connect_nodes(self.nodes[1], 2)
          self.nodes[2].sendrawtransaction(node0_tx2["hex"])
          self.nodes[2].sendrawtransaction(tx2["hex"])
          self.nodes[2].generate(1)  # Mine another block to make sure we sync
          self.sync_blocks()
  
          # Re-fetch transaction info:
          tx1 = self.nodes[0].gettransaction(txid1)
          tx1_clone = self.nodes[0].gettransaction(txid1_clone)
          tx2 = self.nodes[0].gettransaction(txid2)
  
          # Verify expected confirmations
          assert_equal(tx1["confirmations"], -2)
          assert_equal(tx1_clone["confirmations"], 2)
          assert_equal(tx2["confirmations"], 1)
  
          # Check node0's total balance; should be same as before the clone, + 100 BTC for 2 matured,
          # less possible orphaned matured subsidy
          expected += 2*INITIAL_BLOCK_REWARD
          if (self.options.mine_block):
              expected -= INITIAL_BLOCK_REWARD
          assert_equal(self.nodes[0].getbalance(), expected)
  
  if __name__ == '__main__':
      TxnMallTest().main()
  