颤振-如何在Firebase Firestore上以正确格式存储长值？

我想在cloud firestore中存储我的价值，如下所示：

//\\
\\ ¤ //
\\//
(___)                    
(___)
(___)
\_____/\__/     \__/ \_____/
\ _ ​[     ​. * ԀѧνıԀ ​*     ]​ _ /
\_ 也许您应该将文本转换为base64编码形式，并将编码文本存储到CloudFireStore中

在将文本显示到应用程序之前，请解码编码文本

好的，我试试看。
// ¤ \\

                   \\ ¤ //

                     \\//

                    (___)                    

                    (___)

                    (___)

  \_____/\__/     \__/ \_____/

    \ _ ​[     ​. * ԀѧνıԀ ​*     ]​ _ /

            \_Maybe you should convert your text into the base64 encoded form and store encoded text into cloud firestore.

Before showing text into your app please decode your encoded text.

import 'dart:convert';

main() {
  var str = "Hello world";
  var bytes = utf8.encode(str);
  var base64encodeString = base64.encode(bytes);
  var base64decodeString = base64.decode('Decoed Encoded Value');
  print(base64encodeString);
  print(base64decodeString);
}