Graph-node Deployment and testing

One 、 Environmental preparation

• Rust
• PostgreSQL
• IPFS

Two 、 Run this map node

• In the terminal , clone https://github.com/graphprotocol/example-subgraph, And install dependencies and contract ABI Generation type ：(yarn install )

yarn
yarn codegen

• In the terminal , clone https://github.com/graphprotocol/graph-node, And then run

cargo build

• function ganache

./ganache-2.5.4-linux-x86_64.AppImage &

• function ipfs

ipfs daemon

• stay subgraph Compile and deploy smart contracts under folder

//  compile 
truffle compile
//  Deploy 
truffle migrate

• stay postgreSQL Created in graphnode database

sudo su postgres
psql
create database graphnode;

• stay graph-node Enter the following command under the folder , function graph-node：

cargo run -p graph-node --release -- \
  --postgres-url postgresql://postgres:[email protected]:5432/graphnode \
  --ethereum-rpc mainnet:http://127.0.0.1:7545 \
  --ipfs 127.0.0.1:5001 --debug

• modify subgraph In folder subgraph.yaml, Change the contract address to the previously deployed address

sudo gedit subgraph.yaml

• Use this Gravatar Example , Let the subgraph run locally , stay subgraph Run under folder ：

yarn create-local

• Deploy subgraphs

yarn deploy-local

• here graph-node You can see that the subgraph has been deployed

• Try calling the smart contract to create a gravatar

//  Access control 
truffle console
//  Create contract instance 
GravatarRegistry.deployed().then(instance=>contract=instance)
//  Create a displayName by Tom Of Gravatar
contract.createGravatar('Tom','Url')
//  Specify the account to call the contract 
contract.createGravatar('Lucy','Url2',{from: '0x761AE16Df0bF66E6d461F1C936F40e61F2fE1Ed7'})

• Transaction success interface

• graph-node Get the call contract record and log

• visit http://127.0.0.1:8000/subgraphs/name/example/graphql Can be done graphql

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