y-holochain

Holochain provider for Yjs. Easily build peer-to-peer real-time collaboration software using Holochain.

Yjs already offers bindings for many popular rich text editors including Quill, ProseMirror and TipTap.

Usage

1. Setup the zomes in your DNA

   1. hc scaffold zome yjs
   2. run cargo add -p yjs hc_zome_yjs_coordinator
   3. run cargo add -p yjs_integrity hc_zome_yjs_integrity
   4. Replace the integrity zome's lib.rs (its path may be similar to dnas/my-dna/zomes/integrity/yjs/src/lib.rs) and replace its contents with: extern crate hc_zome_yjs_integrity;
   5. Replace the coordinator zome's lib.rs (its path may be similar to dnas/my-dna/zomes/coordinator/yjs/src/lib.rs) and replace its contents with: extern crate hc_zome_yjs_coordinator;

2. Setup the Yjs provider in your front-end

import { HolochainProvider } from 'y-holochain'
import { onMounted, onUnmounted } from 'vue';

let provider: HolochainProvider | undefined;
async setupYjsProvider() {
  // Create a document where this Yjs data will be stored
  const record = await client.callZome({
    zome_name: 'yjs',
    fn_name: 'create_document',
    payload: {
      title: 'My Cool Document'
    }
  });
  const documentActionHash = record.signed_action.hashed.hash;

  // Setup Yjs Doc & HolochainProvider
  const ydoc = new Y.Doc();
  provider = new HolochainProvider(
    ydoc,               // Yjs Y.Doc
    client,             // Holochain client
    "demo",             // RoleName of cell with 'yjs' zome
    "yjs",              // ZomeName of 'yjs' coordinator zome
    documentActionHash  // ActionHash of the document
  );  

  // Setup Yjs Editor Bindings of your choice
  const quill = new Quill("#my-editor-container");
  new QuillBinding(ydoc.getText('quill'), editor);
}

onMounted(() => {
  setupYjsProvider();
});

// Call destroy() when provider no longer in use
onUnmounted(() => {
  if(provider) {
    provider.destroy()
  }
});

YJS has bindings for many popular text & rich-text editors. See https://docs.yjs.dev/ecosystem/editor-bindings for details.