erc20-subgraph/subgraph.yaml

specVersion: 0.0.2
schema:
  file: ./schema.graphql
dataSources:
  # This approach uses a particular event emitted once very early to trigger token registry
  # initialization. It is not so important what the event is but rather that it was emitted before
  # any other event of an ERC20 token. We even don't know what contract it is. Besides that, the ABI
  # file for that contract was inferred since no contract information or source code is available
  # out there.
  - name: TokenRegistry
    kind: ethereum/contract
    network: mainnet
    source:
      abi: TokenRegistry
      address: '0x7f751820be4b1e44464268c425af6095995e045a'
      startBlock: 75563
    mapping:
      kind: ethereum/events
      apiVersion: 0.0.3
      language: wasm/assemblyscript
      file: ./src/mappings/registry.ts
      entities:
        - Token
      abis:
        - name: TokenRegistry
          file: ./abis/TokenRegistry.json
        - name: ERC20
          file: ./abis/ERC20.json
      eventHandlers:
        - event: 'Unknown(indexed bytes,indexed bytes)'
          topic0: '0xa9e319c3b10db96c5cee4bc3ebffa9c5581f222f14a4deb0df7ec2088ccd0974'
          handler: initRegistry
templates:
  # These data sources templates exist to support the different flags that a token could specify
  - name: StandardToken
    kind: ethereum/contract
    network: mainnet
    source:
      abi: ERC20
    mapping:
      kind: ethereum/events
      apiVersion: 0.0.3
      language: wasm/assemblyscript
      file: ./src/mappings/token.ts
      entities:
        - TransferEvent
      abis:
        - name: ERC20
          file: ./abis/ERC20.json
      eventHandlers:
        - event: Transfer(indexed address,indexed address,uint256)
          handler: handleTransfer
  - name: BurnableToken
    kind: ethereum/contract
    network: mainnet
    source:
      abi: Burnable
    mapping:
      kind: ethereum/events
      apiVersion: 0.0.3
      language: wasm/assemblyscript
      file: ./src/mappings/token.ts
      entities:
        - BurnEvent
      abis:
        - name: Burnable
          file: ./abis/Burnable.json
      eventHandlers:
        - event: Burn(indexed address,uint256)
          handler: handleBurn
  - name: MintableToken
    kind: ethereum/contract
    network: mainnet
    source:
      abi: Mintable
    mapping:
      kind: ethereum/events
      apiVersion: 0.0.3
      language: wasm/assemblyscript
      file: ./src/mappings/token.ts
      entities:
        - MintEvent
      abis:
        - name: Mintable
          file: ./abis/Mintable.json
      eventHandlers:
        - event: Mint(indexed address,uint256)
          handler: handleMint
  - name: PausableToken
    kind: ethereum/contract
    network: mainnet
    source:
      abi: Pausable
    mapping:
      kind: ethereum/events
      apiVersion: 0.0.3
      language: wasm/assemblyscript
      file: ./src/mappings/token.ts
      entities:
        - Token
      abis:
        - name: Pausable
          file: ./abis/Pausable.json
      eventHandlers:
        - event: Pause()
          handler: handlePause
        - event: Unpause()
          handler: handleUnpause
        - event: Paused(address)
          handler: handlePaused
        - event: Unpaused(address)
          handler: handleUnpaused