the-graph-wasm

This tool compiles data source definitions for WASM runtime of The Graph.

How It Works

the-graph-wasm takes a data-source.yaml data source definition (with references to a GraphQL schema, smart contract ABIs and data source mappings written in TypeScript/AssemblyScript), compiles the mappings to WASM and outputs a ready-to-use version of the data source.

Usage (TypeScript package)

An example of this can be found in examples/memefactory/.

1. Install the package

   yarn add the-graph-wasm

2. Add the following tsconfig.json:

   {
     "extends": "./node_modules/the-graph-wasm/tsconfig.json",
     "files": ["mapping.ts"]
   }

3. Add a GraphQL schema file and a data source definition.
4. Add the following to package.json:

   {
     "scripts": {
       "codegen": "the-graph-wasm generate-types data-source.yaml",
       "build": "the-graph-wasm compile data-source.yaml"
     }
   }

5. Generate TypeScript type definitions from contract ABIs used in the data source via:

   yarn codegen

6. Develop your mapping.ts against those generated types.
7. Build with

   yarn build

Usage (CLI)

npm install -g https://github.com/graphprotocol/the-graph-wasm
the-graph-wasm compile data-source.yaml