text: import Pyro4
  
  
  BTC = Pyro4.Proxy("PYRONAME:BTC")
  acc1 = BTC.createAccount(100)
  print(acc1)
  bal = BTC.calculateBalance(acc1)
  if bal > 20:
      BTC.transfer(acc1, 1, -60)
  BTC.printChain()
  
  ETH = Pyro4.Proxy("PYRONAME:ETH")
  e1 = ETH.createAccount(30)
  print(e1)
  bal = ETH.calculateBalance(e1)
  if bal > 20:
      ETH.transfer(e1, 1, -20)
  ETH.printChain()
  
  BTC.exchange(acc1, e1, ETH, 50)
  BTC.printChain()
  ETH.printChain()