{
    "Function": "extendPledge",
    "File": "contracts/WardenPledge.sol",
    "Parent Contracts": [
        "contracts/oz/utils/ReentrancyGuard.sol",
        "contracts/oz/utils/Pausable.sol",
        "contracts/oz/utils/Ownable.sol",
        "contracts/oz/utils/Context.sol"
    ],
    "High-Level Calls": [
        "SafeERC20",
        "SafeERC20"
    ],
    "Internal Calls": [
        "revert PledgeClosed()",
        "revert InvalidEndTimestamp()",
        "whenNotPaused",
        "revert ExpiredPledge()",
        "revert NotPledgeCreator()",
        "_getRoundedTimestamp",
        "safe64",
        "revert NullEndTimestamp()",
        "revert IncorrectMaxFeeAmount()",
        "revert InvalidPledgeID()",
        "pledgesIndex",
        "revert DurationTooShort()",
        "nonReentrant",
        "revert IncorrectMaxTotalRewardAmount()"
    ],
    "Library Calls": [
        "safeTransferFrom",
        "safeTransferFrom"
    ],
    "Low-Level Calls": [],
    "Code": "function extendPledge(\n        uint256 pledgeId,\n        uint256 newEndTimestamp,\n        uint256 maxTotalRewardAmount,\n        uint256 maxFeeAmount\n    ) external whenNotPaused nonReentrant {\n        if(pledgeId >= pledgesIndex()) revert Errors.InvalidPledgeID();\n        address creator = pledgeOwner[pledgeId];\n        if(msg.sender != creator) revert Errors.NotPledgeCreator();\n\n        Pledge storage pledgeParams = pledges[pledgeId];\n        if(pledgeParams.closed) revert Errors.PledgeClosed();\n        if(pledgeParams.endTimestamp <= block.timestamp) revert Errors.ExpiredPledge();\n        if(newEndTimestamp == 0) revert Errors.NullEndTimestamp();\n        uint256 oldEndTimestamp = pledgeParams.endTimestamp;\n        if(newEndTimestamp != _getRoundedTimestamp(newEndTimestamp) || newEndTimestamp < oldEndTimestamp) revert Errors.InvalidEndTimestamp();\n\n        uint256 addedDuration = newEndTimestamp - oldEndTimestamp;\n        if(addedDuration < minDelegationTime) revert Errors.DurationTooShort();\n        uint256 totalRewardAmount = (pledgeParams.rewardPerVote * pledgeParams.votesDifference * addedDuration) / UNIT;\n        uint256 feeAmount = (totalRewardAmount * protocalFeeRatio) / MAX_PCT ;\n        if(totalRewardAmount > maxTotalRewardAmount) revert Errors.IncorrectMaxTotalRewardAmount();\n        if(feeAmount > maxFeeAmount) revert Errors.IncorrectMaxFeeAmount();\n\n\n        // Pull all the rewards in this contract\n        IERC20(pledgeParams.rewardToken).safeTransferFrom(creator, address(this), totalRewardAmount);\n        // And transfer the fees from the Pledge creator to the Chest contract\n        IERC20(pledgeParams.rewardToken).safeTransferFrom(creator, chestAddress, feeAmount);\n\n        // Update the Pledge parameters in storage\n        pledgeParams.endTimestamp = safe64(newEndTimestamp);\n\n        pledgeAvailableRewardAmounts[pledgeId] += totalRewardAmount;\n\n        emit ExtendPledgeDuration(pledgeId, oldEndTimestamp, newEndTimestamp);\n    }"
}