How to use the rn-fetch-blob.default function in rn-fetch-blob

const configureFileAttachmentDownloadForAndroid = () =>
  RPCChatTypes.localConfigureFileAttachmentDownloadLocalRpcPromise({
    // Android's cache dir is (when I tried) [app]/cache but Go side uses
    // [app]/.cache by default, which can't be used for sharing to other apps.
    cacheDirOverride: require('rn-fetch-blob').default.fs.dirs.CacheDir,
    downloadDirOverride: require('rn-fetch-blob').default.fs.dirs.DownloadDir,
  })

const configureDownload = (state: TypedState) =>
  state.fs.kbfsDaemonStatus.rpcStatus === Types.KbfsDaemonRpcStatus.Connected &&
  RPCTypes.SimpleFSSimpleFSConfigureDownloadRpcPromise({
    // Android's cache dir is (when I tried) [app]/cache but Go side uses
    // [app]/.cache by default, which can't be used for sharing to other apps.
    cacheDirOverride: require('rn-fetch-blob').default.fs.dirs.CacheDir,
    downloadDirOverride: require('rn-fetch-blob').default.fs.dirs.DownloadDir,
  })

const finishedRegularDownload = async (state: TypedState, action: FsGen.FinishedRegularDownloadPayload) => {
  const {downloadID, mimeType} = action.payload
  const downloadState = state.fs.downloads.state.get(downloadID) || Constants.emptyDownloadState
  const downloadInfo = state.fs.downloads.info.get(downloadID) || Constants.emptyDownloadInfo
  if (downloadState === Constants.emptyDownloadState || downloadInfo === Constants.emptyDownloadInfo) {
    logger.warn('missing download', downloadID)
    return null
  }
  if (downloadState.error) {
    return null
  }
  // @ts-ignore codemod-issue
  await require('rn-fetch-blob').default.android.addCompleteDownload({
    description: `Keybase downloaded ${downloadInfo.filename}`,
    mime: mimeType,
    path: downloadState.localPath,
    showNotification: true,
    title: downloadInfo.filename,
  })
  // No need to dismiss here as the download wrapper does it for Android.
  return null
}

export function copy(from: string, to: string): Promise {
  return require('rn-fetch-blob').default.fs.cp(from, to)
}

const { FolderScreen } = require('lib/components/screens/folder.js');
const { LogScreen } = require('lib/components/screens/log.js');
const { StatusScreen } = require('lib/components/screens/status.js');
const { WelcomeScreen } = require('lib/components/screens/welcome.js');
const { SearchScreen } = require('lib/components/screens/search.js');
const { OneDriveLoginScreen } = require('lib/components/screens/onedrive-login.js');
const { EncryptionConfigScreen } = require('lib/components/screens/encryption-config.js');
const { DropboxLoginScreen } = require('lib/components/screens/dropbox-login.js');
const Setting = require('lib/models/Setting.js');
const { MenuContext } = require('react-native-popup-menu');
const { SideMenu } = require('lib/components/side-menu.js');
const { SideMenuContent } = require('lib/components/side-menu-content.js');
const { DatabaseDriverReactNative } = require('lib/database-driver-react-native');
const { reg } = require('lib/registry.js');
const { _, setLocale, closestSupportedLocale, defaultLocale } = require('lib/locale.js');
const RNFetchBlob = require('rn-fetch-blob').default;
const { PoorManIntervals } = require('lib/poor-man-intervals.js');
const { reducer, defaultState } = require('lib/reducer.js');
const { FileApiDriverLocal } = require('lib/file-api-driver-local.js');
const DropdownAlert = require('react-native-dropdownalert').default;
const ShareExtension = require('react-native-share-extension').default;
const ResourceFetcher = require('lib/services/ResourceFetcher');

const SyncTargetRegistry = require('lib/SyncTargetRegistry.js');
const SyncTargetOneDrive = require('lib/SyncTargetOneDrive.js');
const SyncTargetFilesystem = require('lib/SyncTargetFilesystem.js');
const SyncTargetOneDriveDev = require('lib/SyncTargetOneDriveDev.js');
const SyncTargetNextcloud = require('lib/SyncTargetNextcloud.js');
const SyncTargetWebDAV = require('lib/SyncTargetWebDAV.js');
const SyncTargetDropbox = require('lib/SyncTargetDropbox.js');
SyncTargetRegistry.addClass(SyncTargetOneDrive);
SyncTargetRegistry.addClass(SyncTargetOneDriveDev);

const { shim } = require('lib/shim.js');
const { GeolocationReact } = require('lib/geolocation-react.js');
const { PoorManIntervals } = require('lib/poor-man-intervals.js');
const RNFetchBlob = require('rn-fetch-blob').default;
const { generateSecureRandom } = require('react-native-securerandom');
const FsDriverRN = require('lib/fs-driver-rn.js').FsDriverRN;
const urlValidator = require('valid-url');
const { Buffer } = require('buffer');
const { Linking } = require('react-native');
const mimeUtils = require('lib/mime-utils.js').mime;
const { basename, fileExtension } = require('lib/path-utils.js');
const { uuid } = require('lib/uuid.js');
const Resource = require('lib/models/Resource');

const injectedJs = {
	webviewLib: require('lib/rnInjectedJs/webviewLib'),
};

const cssToJs = {
	'hljs-atom-one-dark-reasonable.css': require('lib/csstojs/hljs-atom-one-dark-reasonable.css.js'),

const { FolderScreen } = require('lib/components/screens/folder.js');
const { LogScreen } = require('lib/components/screens/log.js');
const { StatusScreen } = require('lib/components/screens/status.js');
const { SearchScreen } = require('lib/components/screens/search.js');
const { OneDriveLoginScreen } = require('lib/components/screens/onedrive-login.js');
const { EncryptionConfigScreen } = require('lib/components/screens/encryption-config.js');
const { DropboxLoginScreen } = require('lib/components/screens/dropbox-login.js');
const Setting = require('lib/models/Setting.js');
const { MenuContext } = require('react-native-popup-menu');
const { SideMenu } = require('lib/components/side-menu.js');
const { SideMenuContent } = require('lib/components/side-menu-content.js');
const { SideMenuContentNote } = require('lib/components/side-menu-content-note.js');
const { DatabaseDriverReactNative } = require('lib/database-driver-react-native');
const { reg } = require('lib/registry.js');
const { setLocale, closestSupportedLocale, defaultLocale } = require('lib/locale.js');
const RNFetchBlob = require('rn-fetch-blob').default;
const { PoorManIntervals } = require('lib/poor-man-intervals.js');
const { reducer, defaultState } = require('lib/reducer.js');
const { FileApiDriverLocal } = require('lib/file-api-driver-local.js');
const DropdownAlert = require('react-native-dropdownalert').default;
const ShareExtension = require('react-native-share-extension').default;
const ResourceFetcher = require('lib/services/ResourceFetcher');
const SearchEngine = require('lib/services/SearchEngine');
const WelcomeUtils = require('lib/WelcomeUtils');
const { themeStyle } = require('lib/components/global-style.js');
const { uuid } = require('lib/uuid.js');

const SyncTargetRegistry = require('lib/SyncTargetRegistry.js');
const SyncTargetOneDrive = require('lib/SyncTargetOneDrive.js');
const SyncTargetFilesystem = require('lib/SyncTargetFilesystem.js');
const SyncTargetOneDriveDev = require('lib/SyncTargetOneDriveDev.js');
const SyncTargetNextcloud = require('lib/SyncTargetNextcloud.js');