thegraph使用指南

graph托管服务目前支持的主网

• Ethereum mainnet
• Kovan
• Rinkeby
• Ropsten
• Goerli
• PoA-Core
• PoA-Sokol
• xDAI
• Matic
• Mumbai
• Fantom
• Binance Smart Chain
• Clover
• Avalanche
• Fuji
• Celo
• Celo-Alfajores
• Fuse
• Moonbeam
• Arbitrum One
• Arbitrum Testnet (on Rinkeby)
• Optimism
• Optimism Testnet (on Kovan)

托管subugraph

1. 安装yarn，node环境
   设置yarn仓库
   curl --silent --location https://dl.yarnpkg.com/rpm/yarn.repo | sudo tee /etc/yum.repos.d/yarn.repo
   设置node仓库
   curl --silent --location https://rpm.nodesource.com/setup_16.x | sudo bash -
   开始安装
   sudo yum install yarn
   安装成功
   yarn --version
   配置国内镜像
   yarn config set registry https://registry.npm.taobao.org

2. 安装graph-cli
   Install with yarn:
   yarn global add @graphprotocol/graph-cli
   Install with npm:
   npm install -g @graphprotocol/graph-cli

3. 访问thegraph服务，进入graph studio，创建subgraph,生成SUBGRAPH_SLUG

4. 初始化subgraph
   graph init --studio <SUBGRAPH_SLUG>

5. 修改配置，完成编码

6. 进行auth认证
   graph auth --studio <DEPLOY KEY>

7. 发布subgraph
   graph deploy --studio <SUBGRAPH_SLUG>

自建graph节点

官方quick start
This guide uses Truffle and Ganache for local development. It covers the following steps:

1. Set up Ganache CLI
2. Start a local Graph Node
3. Initialize a new subgraph
4. Deploy an example smart contract to Ganache
5. Deploy the subgraph to the local Graph Node
6. Use the subgraph in a dApp built with React

根据上述步骤进行实操

1. 我们以接入ethereum为测试目标，第一步忽略

2. Graph Node依赖postgres 、ipfs服务，我们以docker部署为例

3. 运行postgres 镜像
   docker run --name=postgres -p 15432:5432 -e POSTGRES_PASSWORD=postgres -e TZ=PRC -d postgres

4. 运行ipfs镜像

docker run -d --name ipfs \
 -v /home/work/app/ipfs-node/staging:/export \
 -v /home/work/app/ipfs-node/data:/data/ipfs \
 -p 5001:5001 \
 ipfs/go-ipfs:latest

3. 运行graph node节点

docker run -it -d --name graph-node-ropsten \
  -p 8000:8000 -p 8001:8001 -p 8020:8020 -p 8030:8030 \
  -e GRAPH_ALLOW_NON_DETERMINISTIC_FULLTEXT_SEARCH="true" \
  -e postgres_host=172.18.0.1 \
  -e postgres_port=5432 \
  -e postgres_user=postgres \
  -e postgres_pass=postgres \
  -e postgres_db=graph-node-ropsten \
  -e ipfs=172.18.0.1:5001 \
  graphprotocol/graph-node:latest

3. 创建一个新的subgraph
   我们拉取uniswap-v2的subgraph代码，来进行实验
   https://github.com/Uniswap/uniswap-v2-subgraph
   修改subgraph.yml配置文件
   主要修改address地址

4. 忽略

5. 发布subgraph到我们的自建节点
   安装代码依赖
   $ yarn && yarn codegen
   创建本地graph
   $ yarn create-local
   发布到本地节点
   $ yarn deploy-local

6. 使用graphql进行查询