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0.0.1-alpha.2 • Public • Published

Holo-REA GraphQL schema binding

Work in progress!

Binds Holochain DNA resolvers for Holo-REA to the ValueFlows protocol spec, thus creating a pluggable VF implementation on Holochain.


This module provides a raw GraphQL schema object and can be used in a variety of ways. However, it is expected that you will most often use it module in a React / Apollo application. In this case, your app initialisation logic will probably include something like this:

import { ApolloClient } from 'apollo-client'
import { InMemoryCache } from 'apollo-cache-inmemory'
import { SchemaLink } from 'apollo-link-schema'
import schema from '@valueflows/vf-graphql-holochain'
const client = new ApolloClient({
  link: new SchemaLink({ schema }),
  cache: new InMemoryCache()

There are other use-cases and examples provided in the example folder at the root of this repository.

Important files

  • types.ts contains implementations for the GraphQL scalar types defined in the VF spec. Any system connecting to a VF-compatible schema requires these handlers to be present.
  • connection.ts is the Holochain conductor websocket connection handling logic.

Other files implement the query bindings between the linked Holo-REA app DNAs and GraphQL entity relationships:

  • queries/*.ts implement the root-level queries exposed by the API.
  • mutations/*.ts implement write operations for interacting with the app DNAs.
  • resolvers/*.ts contains the logic for resolving links between different records.

Publishing to NPM

  • You will need to be given access to the VF NPM org in order to update the module on the registry. You can request access in https://gitter.im/valueflows/welcome
  • Bump the version in package.json & commit to the repository
  • Run npm run build from this directory or npm run build:graphql-adapter from the root of the Holo-REA repository
  • Change to ./build under this directory, where the new generated files are
  • Run npm publish --access public from the ./build directory
  • Tag the current release in git and push the tag to origin


npm i @valueflows/vf-graphql-holochain

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