text: #!/usr/bin/env python3
  # Copyright (c) 2014-2016 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 CredditTestFramework
  from test_framework.util import *
  from test_framework.messages import CTransaction, COIN
  
  
  class TxnMallTest(CredditTestFramework):
      def set_test_params(self):
          self.num_nodes = 4
  
      def add_options(self, parser):
          parser.add_option("--mineblock", dest="mine_block", default=False, action="store_true",
                            help="Test double-spend of 1-confirmed transaction")
  
      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):
          # All nodes should start with 6,250 CREDD:
          starting_balance = 6250
          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(.001)
  
          node0_address1 = self.nodes[0].getnewaddress()
          node0_txid1 = self.nodes[0].sendtoaddress(node0_address1, (1219 * 5))
          node0_tx1 = self.nodes[0].gettransaction(node0_txid1)
  
          node0_address2 = self.nodes[0].getnewaddress()
          node0_txid2 = self.nodes[0].sendtoaddress(node0_address2, (29 * 5))
          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()
  
          tx1_amount = 40 * 5
          # Send tx1, and another transaction tx2 that won't be cloned
          txid1 = self.nodes[0].sendtoaddress(node1_address, tx1_amount)
          txid2 = self.nodes[0].sendtoaddress(node1_address, (20 * 5))
  
          # 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"]}]
          clone_outputs = {rawtx1["vout"][0]["scriptPubKey"]["addresses"][0]: float(rawtx1["vout"][0]["value"]),
                           rawtx1["vout"][1]["scriptPubKey"]["addresses"][0]: float(rawtx1["vout"][1]["value"])}
          clone_locktime = rawtx1["locktime"]
          clone_raw = self.nodes[0].createrawtransaction(clone_inputs, clone_outputs, clone_locktime)
  
          # createrawtransaction randomizes the order of its outputs, so swap them if necessary.
          clone_tx = CTransaction()
          clone_tx.deserialize(io.BytesIO(bytes.fromhex(clone_raw)))
  
          if (rawtx1["vout"][0]["value"] == tx1_amount and clone_tx.vout[0].nValue != tx1_amount*COIN or rawtx1["vout"][0]["value"] != tx1_amount and clone_tx.vout[0].nValue == tx1_amount*COIN):
              (clone_tx.vout[0], clone_tx.vout[1]) = (clone_tx.vout[1], clone_tx.vout[0])
  
          if (rawtx1 == clone_raw):
              print("## !! Equal hex!!")
              assert(False)
  
          # 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].signrawtransaction(clone_tx.serialize().hex(), None, 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 += 250
          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"])
          # mine a block...
          self.nodes[2].generate(1)
  
          # Reconnect the split network, and sync chain:
          connect_nodes(self.nodes[1], 2)
          connect_nodes(self.nodes[0], 2)
          connect_nodes(self.nodes[2], 0)
          connect_nodes(self.nodes[2], 1)
  
          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 += 500
          if (self.options.mine_block):
              expected -= 250
          assert_equal(self.nodes[0].getbalance(), expected)
  
  if __name__ == '__main__':
      TxnMallTest().main()
  
  