text: #!/usr/bin/env python3
  # Copyright (c) 2016 The Bitcoin Core developers
  # Copyright (c) 2017-2020 The Sato Core developers
  # Distributed under the MIT software license, see the accompanying
  # file COPYING or http://www.opensource.org/licenses/mit-license.php.
  
  """Test RPC commands for signing and verifying messages."""
  
  from test_framework.test_framework import SatoTestFramework
  from test_framework.util import assert_equal
  
  class SignMessagesTest(SatoTestFramework):
      def set_test_params(self):
          self.setup_clean_chain = True
          self.num_nodes = 1
  
      def run_test(self):
          message = 'This is just a test message'
  
          self.log.info('test signing with priv_key')
          priv_key = 'cUeKHd5orzT3mz8P9pxyREHfsWtVfgsfDjiZZBcjUBAaGk1BTj7N'
          address = 'mpLQjfK79b7CCV4VMJWEWAj5Mpx8Up5zxB'
          expected_signature = 'H5vCbG+WhOeOPJ3jf6oux/1oSjkuIGZigCw4NW+A0/fSDlgdO4fMq0SWSfx7gUMB9kuG+t/0BQxtXaTCr7v9fGM='
          signature = self.nodes[0].signmessagewithprivkey(priv_key, message)
          assert_equal(expected_signature, signature)
          assert(self.nodes[0].verifymessage(address, signature, message))
  
          self.log.info('test signing with an address with wallet')
          address = self.nodes[0].getnewaddress()
          signature = self.nodes[0].signmessage(address, message)
          assert(self.nodes[0].verifymessage(address, signature, message))
  
          self.log.info('test verifying with another address should not work')
          other_address = self.nodes[0].getnewaddress()
          other_signature = self.nodes[0].signmessage(other_address, message)
          assert(not self.nodes[0].verifymessage(other_address, signature, message))
          assert(not self.nodes[0].verifymessage(address, other_signature, message))
  
  if __name__ == '__main__':
      SignMessagesTest().main()
  