contract BatchCreateDrawingsInterface {
  function isBatchCreateDrawings() public pure returns (bool);

  // 获取内部链跑图
  function getInternalDrawings(uint index) public returns (bytes32 _chainID, 
                                uint256 _startingPrice,
                                uint256 _endingPrice,
                                uint256 _duration, 
                                string memory _metaUrl);

  // 获取原创者链跑图
  function getAuthorDrawings(uint index) public returns (bytes32 _chainID, 
                                bytes32 _author, 
                                address _owner, 
                                string memory _metaUrl);
}
// 批量增加链跑图接口
function getInternalDrawings(uint index) public returns (bytes32 _chainID, 
                                uint256 _startingPrice,
                                uint256 _endingPrice,
                                uint256 _duration, 
                                string memory _metaUrl);
// 获取内部链跑图