rxdb: Unable to store blob type attachments in Electron

Case

bug

Issue

I’ve got an error when trying to store an attachment in electron renderer process, with pouchdb adapter.

    file: Pick<File, 'name' | 'type'> & { blob: Blob }

    await putAttachment(
              {
                id: file.name,
                data: file.blob,
                type: file.type,
              },
              true
            );

Throws:

Uncaught (in promise) TypeError [ERR_INVALID_ARG_TYPE]: The first argument must be of type string 
or an instance of Buffer, ArrayBuffer, or Array or an Array-like Object. Received an instance of Blob

Versions

    "pouchdb-adapter-leveldb": "^7.2.2",
    "rxdb": "^9.12.1",
    "electron": "^11.1.1",

Info

• Environment: electron
• Adapter: pouchdb
• Stack: Typescript,React

Code

After I see the source code, problem in this method, Buffer.from can’t accept a Blob parameter.

  createBlobBuffer: function createBlobBuffer(data, type) {
    var blobBuffer;

    if (_util__WEBPACK_IMPORTED_MODULE_3__.isElectronRenderer) {
      // if we are inside of electron-renderer, always use the node-buffer
      return Buffer.from(data, {
        type: type
      });
    }
  /* ... */

And it is impossible to encrypt the blob type attachments, JSON.stringify also can’t accept a Blob parameter.

var _encryptValue = function _encryptValue(value) {
  return encrypt(JSON.stringify(value), this.password);
};