holochain-file-storage v0.0.1

holochain-file-storage

Frontend package to upload and fetch chunked files from the file_storage zome in a holochain app.

This package assumes you have the file_storage zome exactly as is in your application.

Disclaimer: with the current version of Holochain (0.0.42-alpha5) this process is very slow, 7 minutes for a 3MB file. We are waiting for holochain core to switch from WASMI to WASMER to improve performance.

Right now the chunk size is hardcoded at 256KB since Holochain does not accept bigger chunks. This may change with the new WASM engine.

Install

npm install holochain-file-storage

Usage

Upload a file

import { uploadFile } from 'holochain-file-storage';
import { connect } from '@holochain/hc-web-client';

const instanceName = 'test-instance';

async function upload(file) {
  const { callZome } = await connect({ url: 'ws://localhost:8888' });

  const fileAddress = await uploadFile(callZome, instanceName)(file);
}

Fetch a file

import { fetchFile } from 'holochain-file-storage';
import { connect } from '@holochain/hc-web-client';

const instanceName = 'test-instance';

async function fetch(fileAddress) {
  const { callZome } = await connect({ url: 'ws://localhost:8888' });

  const file = await fetchFile(callZome, instanceName)(fileAddress);
}

Next steps

• Add tests
• Integrate new version of holochain with new WASM engine
• Performance audits and improvements
• Create native elements to upload and fetch files
• Add the option to selectively retrieve parts of files
• Add configurable chunk size?