Resource Fetcher

This module provides functions to download and work with downloaded files stored in the application's document directory inside the react-native-executorch/ directory. These utilities can help you manage your storage and clean up the downloaded files when they are no longer needed.

fetch

Fetches a single resource (remote URL, local file or embedded asset), downloads or stores it locally for use by React Native ExecuTorch.

Reference

import { ResourceFetcher } from 'react-native-executorch';

const localUri = await ResourceFetcher.fetch('https://.../llama3_2.pte');

With download progress:

const localUri = await ResourceFetcher.fetch(
  'https://.../llama3_2.pte',
  (progress) => {
    console.log('Download progress:', progress);
  }
);

Parameters

• source: ResourceSource - A remote string URI, local file URI, require()-based asset.
• callback?: (downloadProgress: number) => void - Optional callback that reports download progress between 0 and 1.

Returns

Promise<string> – A promise which resolves to a local file path (without file:// prefix) for the stored resource.

info

If the resource is an object, it will be saved as a JSON file on disk.

fetchMultipleResources

Fetches multiple resources and combines individual download progress into a single callback.

Reference

import { ResourceFetcher } from 'react-native-executorch';

const uris = await ResourceFetcher.fetchMultipleResources(
  (progress) => console.log('Total progress:', progress),
  'https://.../llama3_2.pte',
  'https://.../qwen3.pte'
);

Parameters

• callback?: (downloadProgress: number) => void - Optional callback to track progress of all downloads, reported between 0 and 1.
• ...sources: ResourceSource[] - Multiple resources that can be strings, asset references, or objects.

Returns

Promise<string[]> – A promise which resolves to an array of local file paths for the downloaded/stored resources (without file:// prefix).

deleteMultipleResources

Deletes downloaded resources from the local filesystem.

Reference

import { ResourceFetcher } from 'react-native-executorch';

await ResourceFetcher.deleteMultipleResources('https://.../llama3_2.pte');

Parameters

• ...sources: ResourceSource[] - The resource identifiers used when calling fetch.

Returns

Promise<void> – A promise that resolves once all specified resources have been removed.

listDownloadedFiles

Lists all the downloaded files used by React Native ExecuTorch.

Reference

import { ResourceFetcher } from 'react-native-executorch';

const filesUris = await ResourceFetcher.listDownloadedFiles();

Returns

Promise<string[]> - A promise, which resolves to an array of URIs for all the downloaded files.

listDownloadedModels

Lists all the downloaded models used by React Native ExecuTorch.

Reference

import { ResourceFetcher } from 'react-native-executorch';

const modelsUris = await ResourceFetcher.listDownloadedModels();

Returns

Promise<string[]> - A promise, which resolves to an array of URIs for all the downloaded models.