Skip to main content

Graph Node

Project Info​

Graph Node is a protocol for building decentralized applications (dApps) quickly on Ethereum and IPFS using GraphQL.

Usage​

We recommend following the Official documentation for deployment. The next operation is only intended as a simple setup tutorial for reference.

Set up graph-node​

For convenience reasons, we use the official docker compose for node, database, and IPFS deployment.

Note that the value of the ethereum field in docker-compose.yml is replaced with Smart Energy Chain's node connection information.

graph-node:
  image: graphprotocol/graph-node
  ports:
    - "8000:8000"
    - "8001:8001"
    - "8020:8020"
    - "8030:8030"
    - "8040:8040"
  depends_on:
    - ipfs
    - postgres
  environment:
    postgres_host: postgres
    postgres_user: graph-node
    postgres_pass: let-me-in
    postgres_db: graph-node
    ipfs: "ipfs:5001"
    ethereum: "mainnet:http://127.0.0.1:8545" #replaced with Smart Energy Chain rpc info
    RUST_LOG: info
info

Note: The node connected to graph-node needs to be in archive mode (add flag --syncmode full --gcmode archive when starting the node), we recommend each user to build their own RPC node.

Create subgraph​

This needs to be written by each user according to their own situation. The following projects can be used as references:

Deploy subgraph​

Package and build the written subgraph into a wasm file and deploy to the graph node . The specific commands can be found in the sample project code above.

GraphQL usage​

Once deployed, you can use GraphQL to request data

graphnode.jpg