API3 oracle timestamp can be set to future timestamp and block API3 Oracle usage to make code revert in underflow

    function getPrice_e36(address _token) external view returns (uint price_e36) {
        // load and check
        DataFeedInfo memory dataFeedInfo = dataFeedInfos[_token];
        _require(dataFeedInfo.dataFeedId != bytes32(0), Errors.DATAFEED_ID_NOT_SET);
        _require(dataFeedInfo.maxStaleTime != 0, Errors.MAX_STALETIME_NOT_SET);

        // get price and token's decimals
        uint decimals = uint(IERC20Metadata(_token).decimals());
        // return price per token with 1e18 precisions
        // e.g. 1 BTC = 35000 * 1e18 in USD_e18 unit
        (int224 price, uint timestamp) = IApi3ServerV1(api3ServerV1).readDataFeedWithId(dataFeedInfo.dataFeedId);

        // check if the last updated is not longer than the max stale time
        _require(block.timestamp - timestamp Note the check:

    /// @notice Reads the data feed with ID
    /// @param dataFeedId Data feed ID
    /// @return value Data feed value
    /// @return timestamp Data feed timestamp
    function _readDataFeedWithId(
        bytes32 dataFeedId
    ) internal view returns (int224 value, uint32 timestamp) {
        DataFeed storage dataFeed = _dataFeeds[dataFeedId];
        (value, timestamp) = (dataFeed.value, dataFeed.timestamp);
        require(timestamp > 0, "Data feed not initialized");
    }

  function processBeaconUpdate(
        bytes32 beaconId,
        uint256 timestamp,
        bytes calldata data
    )
        internal
        onlyValidTimestamp(timestamp)
        returns (int224 updatedBeaconValue)
    {
        updatedBeaconValue = decodeFulfillmentData(data);
        require(
            timestamp > _dataFeeds[beaconId].timestamp,
            "Does not update timestamp"
        );
        _dataFeeds[beaconId] = DataFeed({
            value: updatedBeaconValue,
            timestamp: uint32(timestamp)
        });
    }

    /// @dev Reverts if the timestamp is from more than 1 hour in the future
    modifier onlyValidTimestamp(uint256 timestamp) virtual {
        unchecked {
            require(
                timestamp What does this mean?

The timestamp of an oracle can be set to the future within an hour, the relayer does not have to be malicious, it is a normal part of updating data.

Suppose the current timestamp is 10000

1 hour = 3600 seconds

If the relayer set timestamp to 12000, the price update will go through

But the code:

if (block.timestamp > timestamp) {
 _require(block.timestamp - timestamp **[fez-init (INIT) confirmed](https://github.com/code-423n4/2023-12-initcapital-findings/issues/4#issuecomment-1869777419)**