pragma solidity 0.7.6;

// SPDX-License-Identifier: GPL-3.0-only

import 'oz-contracts-3-4-0/math/SafeMath.sol';

import '../RocketBase.sol';
import '../../interface/minipool/RocketMinipoolPenaltyInterface.sol';

// Non-upgradable contract which gives guardian control over maximum penalty rates

contract RocketMinipoolPenalty is RocketBase, RocketMinipoolPenaltyInterface {
    // Events
    event MaxPenaltyRateUpdated(uint256 rate, uint256 time);

    // Libs
    using SafeMath for uint;

    // Storage (purposefully does not use RocketStorage to prevent oDAO from having power over this feature)
    uint256 maxPenaltyRate = 0 ether; // The most the oDAO is allowed to penalty a minipool (as a percentage)

    // Construct
    constructor(RocketStorageInterface _rocketStorageAddress) RocketBase(_rocketStorageAddress) {}

    // Get/set the current max penalty rate
    function setMaxPenaltyRate(uint256 _rate) external override onlyGuardian {
        // Update rate
        maxPenaltyRate = _rate;
        // Emit event
        emit MaxPenaltyRateUpdated(_rate, block.timestamp);
    }
    function getMaxPenaltyRate() external view override returns (uint256) {
        return maxPenaltyRate;
    }

    // Retrieves the amount to penalty a minipool
    function getPenaltyRate(address _minipoolAddress) external view override returns (uint256) {
        // Quick out which avoids a call to RocketStorage
        if (maxPenaltyRate == 0) {
            return 0;
        }
        // Retrieve penalty rate for this minipool
        uint256 penaltyRate = getUint(keccak256(abi.encodePacked('minipool.penalty.rate', _minipoolAddress)));
        // min(maxPenaltyRate, penaltyRate)
        if (penaltyRate > maxPenaltyRate) {
            return maxPenaltyRate;
        }
        return penaltyRate;
    }

    // Sets the penalty rate for the given minipool
    function setPenaltyRate(address _minipoolAddress, uint256 _rate) external override onlyLatestNetworkContract {
        setUint(keccak256(abi.encodePacked('minipool.penalty.rate', _minipoolAddress)), _rate);
    }
}