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// SPDX-License-Identifier: MIT
pragma solidity ^0.8.19;

/// @title PermissionsManager
/// @notice Manages admin and whitelisted caller permissions for the lending system
contract PermissionsManager {
    /*//////////////////////////////////////////////////////////////
                                STORAGE
    //////////////////////////////////////////////////////////////*/

    /// @notice The admin address who can manage permissions
    address public admin;

    /// @notice Mapping of whitelisted callers
    mapping(address => bool) public whitelistedCallers;

    /*//////////////////////////////////////////////////////////////
                                EVENTS
    //////////////////////////////////////////////////////////////*/

    event AdminUpdated(address indexed oldAdmin, address indexed newAdmin);
    event CallerWhitelisted(address indexed caller);
    event CallerRemovedFromWhitelist(address indexed caller);

    /*//////////////////////////////////////////////////////////////
                                ERRORS
    //////////////////////////////////////////////////////////////*/

    error OnlyAdmin();
    error UnauthorizedCaller();
    error AdminZeroAddress();
    error CallerAlreadyWhitelisted();
    error CallerNotWhitelisted();

    /*//////////////////////////////////////////////////////////////
                               MODIFIERS
    //////////////////////////////////////////////////////////////*/

    /// @notice Restricts function access to admin only
    modifier onlyAdmin() {
        if (msg.sender != admin) revert OnlyAdmin();
        _;
    }

    /// @notice Restricts function access to whitelisted callers only
    modifier onlyAuthorized() {
        if (!whitelistedCallers[msg.sender]) revert UnauthorizedCaller();
        _;
    }

    /*//////////////////////////////////////////////////////////////
                              CONSTRUCTOR
    //////////////////////////////////////////////////////////////*/

    /// @notice Constructor sets the initial admin
    /// @param _admin The initial admin address
    constructor(address _admin) {
        if (_admin == address(0)) revert AdminZeroAddress();
        admin = _admin;

        // Admin is automatically whitelisted
        whitelistedCallers[_admin] = true;

        emit AdminUpdated(address(0), _admin);
        emit CallerWhitelisted(_admin);
    }

    /*//////////////////////////////////////////////////////////////
                           ADMIN FUNCTIONS
    //////////////////////////////////////////////////////////////*/

    /// @notice Updates the admin address
    /// @param newAdmin The new admin address
    function updateAdmin(address newAdmin) external onlyAdmin {
        if (newAdmin == address(0)) revert AdminZeroAddress();

        address oldAdmin = admin;
        admin = newAdmin;

        // Automatically whitelist new admin
        whitelistedCallers[newAdmin] = true;

        emit AdminUpdated(oldAdmin, newAdmin);
        emit CallerWhitelisted(newAdmin);
    }

    /// @notice Adds a caller to the whitelist
    /// @param caller The address to whitelist
    function addWhitelistedCaller(address caller) external onlyAdmin {
        if (whitelistedCallers[caller]) revert CallerAlreadyWhitelisted();

        whitelistedCallers[caller] = true;
        emit CallerWhitelisted(caller);
    }

    /// @notice Removes a caller from the whitelist
    /// @param caller The address to remove from whitelist
    function removeWhitelistedCaller(address caller) external onlyAdmin {
        if (!whitelistedCallers[caller]) revert CallerNotWhitelisted();
        if (caller == admin) revert OnlyAdmin(); // Cannot remove admin from whitelist

        whitelistedCallers[caller] = false;
        emit CallerRemovedFromWhitelist(caller);
    }

    /*//////////////////////////////////////////////////////////////
                            VIEW FUNCTIONS
    //////////////////////////////////////////////////////////////*/

    /// @notice Checks if a caller is authorized (whitelisted)
    /// @param caller The address to check
    /// @return True if the caller is whitelisted
    function isAuthorized(address caller) external view returns (bool) {
        return whitelistedCallers[caller];
    }

    /// @notice Gets the current admin address
    /// @return The admin address
    function getAdmin() external view returns (address) {
        return admin;
    }
}

{
  "remappings": [
    "@pendle/core-v2/=lib/pendle-core-v2-public/",
    "@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/",
    "aave-v3-core/=lib/aave-v3-core/",
    "halmos-cheatcodes/=lib/openzeppelin-contracts/lib/halmos-cheatcodes/src/",
    "morpho-blue/=lib/morpho-blue/",
    "pendle-core-v2-public/=lib/pendle-core-v2-public/contracts/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 10000
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "ipfs",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "paris",
  "viaIR": true
}

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[{"inputs":[{"internalType":"address","name":"_admin","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"AdminZeroAddress","type":"error"},{"inputs":[],"name":"CallerAlreadyWhitelisted","type":"error"},{"inputs":[],"name":"CallerNotWhitelisted","type":"error"},{"inputs":[],"name":"OnlyAdmin","type":"error"},{"inputs":[],"name":"UnauthorizedCaller","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"oldAdmin","type":"address"},{"indexed":true,"internalType":"address","name":"newAdmin","type":"address"}],"name":"AdminUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"caller","type":"address"}],"name":"CallerRemovedFromWhitelist","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"caller","type":"address"}],"name":"CallerWhitelisted","type":"event"},{"inputs":[{"internalType":"address","name":"caller","type":"address"}],"name":"addWhitelistedCaller","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"admin","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getAdmin","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"caller","type":"address"}],"name":"isAuthorized","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"caller","type":"address"}],"name":"removeWhitelistedCaller","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newAdmin","type":"address"}],"name":"updateAdmin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"whitelistedCallers","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"}]

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0000000000000000000000007460339c10cf19df91f2fb9138f4be69fff85155

-----Decoded View---------------
Arg [0] : _admin (address): 0x7460339c10cF19Df91f2Fb9138F4be69fFf85155

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000007460339c10cf19df91f2fb9138f4be69fff85155