specVersion: 0.0.1
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'
    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
      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