Define a Subgraph
A subgraph defines which data The Graph will index from a blockchain, and how it will store it. Once deployed, it will form a part of a global graph of blockchain data which you can retrieve using GraphQL.
Define a Subgraph
The subgraph definition consists of a few files:
subgraph.yaml: a YAML file containing the subgraph manifestschema.graphql: a GraphQL schema that defines what data is stored for your subgraph, and how to query it via GraphQLAssemblyScript Mappings: AssemblyScript code that translates from the event data to the entities defined in your schema (e.g.mapping.tsin this tutorial)
Before you go into detail about the contents of the manifest file, you need to install the Graph CLI which you will need to build and deploy a subgraph.
The Graph CLI is written in JavaScript, and you will need to install either
yarn or npm to use it; it is assumed that you have yarn in what follows.Once you have
yarn, install the Graph CLI by runningInstall with yarn:
yarn global add @graphprotocol/graph-cli
Install with npm:
npm install -g @graphprotocol/graph-cli
Last modified 1yr ago