GraphGen annotations example

IUniswapV2.sol

pragma solidity >=0.5.0;

/* @gg:source
  name: Pair */
interface IUniswapV2Pair {
  /* @gg:field */
  function name() external pure returns (string memory);
  
  /* @gg:field */
  function symbol() external pure returns (string memory);
  
  /* @gg:field */
  function decimals() external pure returns (uint8);
  
  /* @gg:field */
  function totalSupply() external view returns (uint);

  ...

  /* @gg:handler 
      actions:
        - StoreEvent
        - UpdateField totalSupply */
  event Mint(address indexed sender, uint amount0, uint amount1);

  /* @gg:handler 
      actions:
        - StoreEvent
        - UpdateField totalSupply */
  event Burn(address indexed sender, uint amount0, uint amount1, address indexed to);

  /* @gg:handler 
      actions:
        - StoreEvent
        - UpdateField price0
        - UpdateField price1 */
  event Swap(
      address indexed sender,
      uint amount0In,
      uint amount1In,
      uint amount0Out,
      uint amount1Out,
      address indexed to
  );

  /* @gg:field */
  function token0() external view returns (address);
  
  /* @gg:field */
  function token1() external view returns (address);

  /* @gg:field 
    name: price0 */
  function price0CumulativeLast() external view returns (uint);
  
  /* @gg:field 
    name: price1 */
  function price1CumulativeLast() external view returns (uint);

  ...
}

/* @gg:source
  name: Factory
  instances:
    - address: '0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f'
      startBlock: 10000834 */
interface IUniswapV2Factory {
  /* @gg:handler 
    actions:
      - NewEntity Pair from pair */
  event PairCreated(address indexed token0, address indexed token1, address pair, uint);
  
  ...
}