text: /* Copyright 2018 Intel Corporation
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  #pragma once
  
  #include <string>
  
  #include "crypto.h"
  #include "parson.h"
  
  // XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
  // XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
  class ContractMessage
  {
  protected:
      bool VerifySignature(const ByteArray& signature) const;
      void ComputeHash(ByteArray& message_hash) const;
  
  public:
      std::string expression_;
      std::string originator_verifying_key_;
      std::string channel_verifying_key_;
      std::string nonce_;
      ByteArray message_hash_;
  
      ContractMessage(void){};
      void Unpack(const JSON_Object* object);
  };
  