erc20-subgraph

The subgraph for ERC20.

1. Setup work environment

1.1 Resolve host name graph-node by edit hosts file

• Linux: /etc/hosts
• Windows: C:\Windows\System32\drivers\etc\hosts

test:

ping graph-node

1.2 Install node and yarn

Suggest to use node v18, the package.json requires:

• node >= 18.0.0
• yarn >= 1.22.0

2. Clone this repo

git clone https://github.com/gzliudan/erc20-subgraph
cd erc20-subgraph
yarn

3. Build and deploy

3.1 For apothem chain

yarn make:apothem && yarn create:apothem && yarn deploy:apothem

3.2 For xinfin chain

yarn make:xinfin && yarn create:xinfin && yarn deploy:xinfin

4. Query

Endpoints:

• apothem network: http://graph-node:8000/subgraphs/name/gzliudan/test-coin-subgraph-apothem
• xinfin network: http://graph-node:8000/subgraphs/name/gzliudan/test-coin-subgraph-xinfin

Query statement:

{
    erc20Contracts(first: 5) {
        id
        asAccount {
            id
        }
        name
        symbol
        decimals
        totalSupply {
            value
            valueExact
        }
    }
    accounts(first: 5) {
        id
        asErc20 {
            id
        }
        Erc20balances {
            id
            value
            valueExact
        }
    }
}