function getSqrtPrice() external view returns (uint256 sqrtPrice) {
@>        (, int256 quoteAnswer,,,) = AggregatorV3Interface(_quotePriceFeed).latestRoundData(); // missing additional checks

        IPyth.Price memory basePrice = IPyth(_pyth).getPriceNoOlderThan(_priceId, VALID_TIME_PERIOD);

        require(basePrice.expo == -8, "INVALID_EXP");

        require(quoteAnswer > 0 && basePrice.price > 0);

        uint256 price = uint256(int256(basePrice.price)) * Constants.Q96 / uint256(quoteAnswer);
        price = price * Constants.Q96 / _decimalsDiff;

        sqrtPrice = FixedPointMathLib.sqrt(price);
    }
@@ -43,7 +43,10 @@ contract PriceFeed {
 
     /// @notice This function returns the square root of the baseToken price quoted in quoteToken.
     function getSqrtPrice() external view returns (uint256 sqrtPrice) {
-        (, int256 quoteAnswer,,,) = AggregatorV3Interface(_quotePriceFeed).latestRoundData();
+        (uint80 quoteRoundID, int256 quoteAnswer,, uint256 quoteTimestamp, uint80 quoteAnsweredInRound) =
+            AggregatorV3Interface(_quotePriceFeed).latestRoundData();
+        require(quoteAnsweredInRound >= quoteRoundID, "Stale price!");
+        require(quoteTimestamp != 0, "Round not complete!");
+        require(block.timestamp - quoteTimestamp <= VALID_TIME_PERIOD);
