pragma solidity >=0.4.24;

import "tidbit/contracts/DataFeedOracles/DataFeedOracleBase.sol";
import "../ExchangeAdapters/IExchangeAdapter.sol";

contract TokenPriceDataFeed is DataFeedOracleBase {
  address public token1;
  address public token2;
  IExchangeAdapter public exchangeAdapter;

  function initialize(
    address _token1,
    address _token2,
    IExchangeAdapter _exchangeAdapter
  )
    public
  {
    token1 = _token1;
    token2 = _token2;
    exchangeAdapter = _exchangeAdapter;

    // set dataSource to `this` so setResult can only be called from this contract
    DataFeedOracleBase.initialize(address(this));
  }

  function logResult() public {
    uint price = exchangeAdapter.getPriceForTokenPair(token1, token2);
    DataFeedOracleBase(this).setResult(bytes32(price), uint256(block.timestamp));
  }
}