text: #!/usr/bin/env python3
  # Copyright (c) 2019 The PIVX developers
  # Distributed under the MIT software license, see the accompanying
  # file COPYING or http://www.opensource.org/licenses/mit-license.php.
  
  '''
  Covers the 'Wrapped Serials Attack' scenario
  '''
  
  import random
  from time import sleep
  
  from test_framework.authproxy import JSONRPCException
  from test_framework.util import assert_equal, assert_greater_than
  
  from fake_stake.base_test import AllForOneBusiness_FakeStakeTest
  
  class zAFOValidCoinSpendTest(AllForOneBusiness_FakeStakeTest):
  
      def run_test(self):
          self.description = "Covers the 'valid publicCoinSpend spend' scenario."
          self.init_test()
  
          INITAL_MINED_BLOCKS = 301   # Blocks mined before minting
          MORE_MINED_BLOCKS = 52      # Blocks mined after minting (before spending)
          DENOM_TO_USE = 1         # zc denomination used for double spending attack
  
          # 1) Start mining blocks
          self.log.info("Mining %d first blocks..." % INITAL_MINED_BLOCKS)
          self.node.generate(INITAL_MINED_BLOCKS)
          sleep(2)
  
          # 2) Mint zerocoins
          self.log.info("Minting %d-denom zAFOs..." % DENOM_TO_USE)
          self.node.mintzerocoin(DENOM_TO_USE)
          self.node.generate(1)
          sleep(2)
          self.node.mintzerocoin(DENOM_TO_USE)
          sleep(2)
  
          # 3) Mine more blocks and collect the mint
          self.log.info("Mining %d more blocks..." % MORE_MINED_BLOCKS)
          self.node.generate(MORE_MINED_BLOCKS)
          sleep(2)
          list = self.node.listmintedzerocoins(True, True)
          mint = list[0]
  
          # 4) Get the raw zerocoin data
          exported_zerocoins = self.node.exportzerocoins(False)
          zc = [x for x in exported_zerocoins if mint["serial hash"] == x["id"]]
          if len(zc) == 0:
              raise AssertionError("mint not found")
  
          # 5) Spend the minted coin (mine six more blocks)
          self.log.info("Spending the minted coin with serial %s and mining six more blocks..." % zc[0]["s"])
          txid = self.node.spendzerocoinmints([mint["serial hash"]])['txid']
          self.log.info("Spent on tx %s" % txid)
          self.node.generate(6)
          sleep(2)
  
          rawTx = self.node.getrawtransaction(txid, 1)
          if rawTx is None:
              self.log.warning("rawTx is: %s" % rawTx)
              raise AssertionError("TEST FAILED")
          else:
              assert (rawTx["confirmations"] == 6)
  
          self.log.info("%s VALID PUBLIC COIN SPEND PASSED" % self.__class__.__name__)
  
          self.log.info("%s Trying to spend the serial twice now" % self.__class__.__name__)
  
          serial = zc[0]["s"]
          randomness = zc[0]["r"]
          privkey = zc[0]["k"]
  
          tx = None
          try:
              tx = self.node.spendrawzerocoin(serial, randomness, DENOM_TO_USE, privkey)
          except JSONRPCException as e:
              self.log.info("GOOD: Transaction did not verify")
  
          if tx is not None:
              self.log.warning("Tx is: %s" % tx)
              raise AssertionError("TEST FAILED")
  
          self.log.info("%s DOUBLE SPENT SERIAL NOT VERIFIED, TEST PASSED" % self.__class__.__name__)
  
          self.log.info("%s Trying to spend using the old coin spend method.." % self.__class__.__name__)
  
          tx = None
          try:
              tx = self.node.spendzerocoin(DENOM_TO_USE, False, False, "", False)
              raise AssertionError("TEST FAILED, old coinSpend spent")
          except JSONRPCException as e:
              self.log.info("GOOD: spendzerocoin old spend did not verify")
  
  
          self.log.info("%s OLD COIN SPEND NON USABLE ANYMORE, TEST PASSED" % self.__class__.__name__)
  
  
  if __name__ == '__main__':
      zAFOValidCoinSpendTest().main()
  