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// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.22;

contract BorrowController {

    uint constant MANTISSA = 1e18;
    address public owner;
    address public guardian;
    uint public dailyBorrowLimitUsd = 100000e18; // $100,000
    bool public forbidContracts = true;
    mapping(address => uint) public dailyBorrowLimitLastUpdate;
    mapping(address => uint) public lastDailyBorrowLimitRemainingUsd;
    mapping(address => bool) public isPoolBorrowPaused;
    mapping(address => bool) public isPoolBorrowSuspended;
    mapping(address => bool) public isContractAllowed;

    constructor() {
        owner = msg.sender;
    }

    modifier onlyOwner {
        require(msg.sender == owner, "onlyOwner");
        _;
    }

    modifier onlyGuardian {
        require(msg.sender == guardian, "onlyGuardian");
        _;
    }

    function setOwner(address _owner) external onlyOwner { owner = _owner; }
    function setGuardian(address _guardian) external onlyOwner { guardian = _guardian; }
    function setPoolBorrowPaused(address pool, bool paused) external onlyGuardian {
        require(!isPoolBorrowSuspended[pool], "borrowSuspended");
        isPoolBorrowPaused[pool] = paused;
    }
    function setForbidContracts(bool forbid) external onlyOwner { forbidContracts = forbid; }
    function setContractAllowed(address contractAddress, bool allowed) external onlyOwner { isContractAllowed[contractAddress] = allowed; }
    function setPoolBorrowSuspended(address pool, bool suspended) external onlyOwner {
        isPoolBorrowSuspended[pool] = suspended;
        if(suspended) isPoolBorrowPaused[pool] = true;
    }
    function setDailyBorrowLimitUsd(uint _dailyBorrowLimitUsd) public onlyOwner {
        dailyBorrowLimitUsd = _dailyBorrowLimitUsd;
    }

    function updateDailyBorrowLimit() internal {
        uint timeElapsed = block.timestamp - dailyBorrowLimitLastUpdate[msg.sender];
        if(timeElapsed == 0) return;
        // add daily limit capacity linearly based on time elapsed
        uint addedCapacity = timeElapsed * dailyBorrowLimitUsd / 1 days;
        uint newLimit = lastDailyBorrowLimitRemainingUsd[msg.sender] + addedCapacity;
        // cap the limit to the maximum daily limit
        if(newLimit > dailyBorrowLimitUsd) newLimit = dailyBorrowLimitUsd;
        lastDailyBorrowLimitRemainingUsd[msg.sender] = newLimit;
        dailyBorrowLimitLastUpdate[msg.sender] = block.timestamp;
    }

    function onBorrow(address pool, address borrower, uint amount, uint price) external {
        require(!isPoolBorrowPaused[pool], "borrowPaused");
        if(forbidContracts) {
            require(tx.origin == borrower || isContractAllowed[borrower], "contractNotAllowed");
        }
        updateDailyBorrowLimit();
        uint extraDebtUsd = amount * price / MANTISSA;
        lastDailyBorrowLimitRemainingUsd[msg.sender] -= extraDebtUsd;
    }

    function onRepay(address /*pool*/, address /*borrower*/, uint amount, uint price) external {
        updateDailyBorrowLimit();
        uint repaidDebtUsd = amount * price / MANTISSA;
        // free up the repaid debt capacity up to the daily limit
        if(lastDailyBorrowLimitRemainingUsd[msg.sender] + repaidDebtUsd > dailyBorrowLimitUsd) {
            lastDailyBorrowLimitRemainingUsd[msg.sender] = dailyBorrowLimitUsd;
        } else {
            lastDailyBorrowLimitRemainingUsd[msg.sender] += repaidDebtUsd;
        }
    }

}

{
  "remappings": [
    "@openzeppelin/contracts/=lib/openzeppelin-contracts/contracts/",
    "ds-test/=lib/forge-std/lib/ds-test/src/",
    "erc4626-tests/=lib/openzeppelin-contracts/lib/erc4626-tests/",
    "forge-std/=lib/forge-std/src/",
    "openzeppelin-contracts/=lib/openzeppelin-contracts/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "ipfs",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "paris",
  "viaIR": false,
  "libraries": {}
}

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[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"dailyBorrowLimitLastUpdate","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"dailyBorrowLimitUsd","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"forbidContracts","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"guardian","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"isContractAllowed","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"isPoolBorrowPaused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"isPoolBorrowSuspended","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"lastDailyBorrowLimitRemainingUsd","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"pool","type":"address"},{"internalType":"address","name":"borrower","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"price","type":"uint256"}],"name":"onBorrow","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"uint256","name":"price","type":"uint256"}],"name":"onRepay","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"contractAddress","type":"address"},{"internalType":"bool","name":"allowed","type":"bool"}],"name":"setContractAllowed","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_dailyBorrowLimitUsd","type":"uint256"}],"name":"setDailyBorrowLimitUsd","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bool","name":"forbid","type":"bool"}],"name":"setForbidContracts","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_guardian","type":"address"}],"name":"setGuardian","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_owner","type":"address"}],"name":"setOwner","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"pool","type":"address"},{"internalType":"bool","name":"paused","type":"bool"}],"name":"setPoolBorrowPaused","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"pool","type":"address"},{"internalType":"bool","name":"suspended","type":"bool"}],"name":"setPoolBorrowSuspended","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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