bad base-64 fs.readStream

[kholiavko-roman]

Info

"rn-fetch-blob": "^0.11.2",
"react-native": "^0.60.5",
platform: both

Issue: Cant write file after it read from stream as base64. My test file is image (jpg)

YellowBox.js:71 Possible Unhandled Promise Rejection (id: 0):
Error: bad base-64
Error: bad base-64
    at createErrorFromErrorData 

What: I want to read from stream as base64 string and save it to new file using fs.createFile

const { fs } = RNFetchBlob;

  fs
    .exists(file.image.path)
    .then(exist => {
      console.log('Send file socket exist', exist);

      if (exist) {
        console.log('index file exists');

        fs
          .readStream(file.image.path, 'base64', 102400)
          .then(stream => {
            stream.open();

            let result = '';

            stream.onData(chunk => {
              result += chunk;

              // console.log('Chunk', chunk);
              // console.log('~~~~~~~~~~~~');
            });
            stream.onError(error => {
              console.log('ERRRRORRRR');
              console.log(error);
            });
            stream.onEnd(() => {
              const dirs = RNFetchBlob.fs.dirs;

              // .writeFile(
              RNFetchBlob.fs
                .createFile(
                  dirs.DownloadDir + '/tesssssssst.jpg',
                  result,
                  'base64'
                )
                .then(() => {});
            });
          })
          .catch(err => {
            console.log(err);
          });
      } else {
        console.log('index file NOT exists');
      }
    })
    .catch(err => {
      console.log(err);
    });