BiPoolManager.sol

/**
 * @title BiPoolExchangeManager
 * @notice An exchange manager that manages asset exchanges consisting of two assets
 */
contract BiPoolManager {
  
  /**
   * @notice Execute a token swap with fixed amountIn
   * @param exchangeId The id of exchange, i.e. PoolExchange to use
   * @param tokenIn The token to be sold
   * @param tokenOut The token to be bought
   * @param amountIn The amount of tokenIn to be sold
   * @return amountOut The amount of tokenOut to be bought
   */
  function swapIn(
    bytes32 exchangeId,
    address tokenIn,
    address tokenOut,
    uint256 amountIn
  ) external onlyBroker returns (uint256 amountOut) {
    PoolExchange memory exchange = getPoolExchange(exchangeId);
    require(
      breakerBox.getRateFeedTradingMode(exchange.config.referenceRateFeedID) == TRADING_MODE_BIDIRECTIONAL,
      "Trading is suspended for this reference rate"
    );

    uint256 scaledAmountIn = amountIn.mul(tokenPrecisionMultipliers[tokenIn]);
    (uint256 scaledAmountOut, bool bucketsUpdated) = _getAmountOut(exchange, tokenIn, tokenOut, scaledAmountIn);
    executeSwap(exchangeId, exchange, tokenIn, scaledAmountIn, scaledAmountOut, bucketsUpdated);

    amountOut = scaledAmountOut.div(tokenPrecisionMultipliers[tokenOut]);
    return amountOut;
  }
   
}