// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (bool success, ) = recipient.call{value: amount}("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain `call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        require(isContract(target), "Address: call to non-contract");

        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity =0.8.10;

/// @notice Minimal implementation of access control mechanism with two roles (owner & controller)
/// @dev Modified from OpenZeppelin (https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/access/Ownable.sol)
contract Controlled {
    /*///////////////////////////////////////////////////////////////
                                 ERRORS
    //////////////////////////////////////////////////////////////*/

    error CallerIsNotAuthorized();
    error TargetIsZeroAddress();

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

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
    event ControlTransferred(address indexed previousController, address indexed newController);

    /*///////////////////////////////////////////////////////////////
                             ROLES STORAGE
    //////////////////////////////////////////////////////////////*/

    address private _owner;
    address private _controller;

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

    constructor() {
        _transferOwnership(msg.sender);
        _transferControl(msg.sender);
    }

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

    modifier onlyOwner() {
        if (_owner != msg.sender) revert CallerIsNotAuthorized();
        _;
    }

    modifier onlyController() {
        if (_controller != msg.sender) revert CallerIsNotAuthorized();
        _;
    }

    modifier onlyOwnerOrController() {
        if (_owner != msg.sender && _controller != msg.sender) revert CallerIsNotAuthorized();
        _;
    }

    /*///////////////////////////////////////////////////////////////
                                VIEWS
    //////////////////////////////////////////////////////////////*/

    function owner() public view virtual returns (address) {
        return _owner;
    }

    function controller() public view virtual returns (address) {
        return _controller;
    }

    /*///////////////////////////////////////////////////////////////
                               ACTIONS
    //////////////////////////////////////////////////////////////*/

    function renounceOwnership() external virtual onlyOwner {
        _transferOwnership(address(0));
    }

    function removeControl() external virtual onlyOwnerOrController {
        _transferControl(address(0));
    }

    function transferOwnership(address newOwner) external virtual onlyOwner {
        if (newOwner == address(0)) revert TargetIsZeroAddress();
        _transferOwnership(newOwner);
    }

    function transferControl(address newController) external virtual onlyOwnerOrController {
        if (newController == address(0)) revert TargetIsZeroAddress();
        _transferControl(newController);
    }

    /*///////////////////////////////////////////////////////////////
                            INTERNAL LOGIC
    //////////////////////////////////////////////////////////////*/

    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }

    function _transferControl(address newController) internal virtual {
        address oldController = _controller;
        _controller = newController;
        emit ControlTransferred(oldController, newController);
    }
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;

/// @notice Modern and gas efficient ERC20 + EIP-2612 implementation.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/tokens/ERC20.sol)
/// @author Modified from Uniswap (https://github.com/Uniswap/uniswap-v2-core/blob/master/contracts/UniswapV2ERC20.sol)
/// @dev Do not manually set balances without updating totalSupply, as the sum of all user balances must not exceed it.
abstract contract ERC20 {
    /*//////////////////////////////////////////////////////////////
                                 EVENTS
    //////////////////////////////////////////////////////////////*/

    event Transfer(address indexed from, address indexed to, uint256 amount);

    event Approval(address indexed owner, address indexed spender, uint256 amount);

    /*//////////////////////////////////////////////////////////////
                            METADATA STORAGE
    //////////////////////////////////////////////////////////////*/

    string public name;

    string public symbol;

    uint8 public immutable decimals;

    /*//////////////////////////////////////////////////////////////
                              ERC20 STORAGE
    //////////////////////////////////////////////////////////////*/

    uint256 public totalSupply;

    mapping(address => uint256) public balanceOf;

    mapping(address => mapping(address => uint256)) public allowance;

    /*//////////////////////////////////////////////////////////////
                            EIP-2612 STORAGE
    //////////////////////////////////////////////////////////////*/

    uint256 internal immutable INITIAL_CHAIN_ID;

    bytes32 internal immutable INITIAL_DOMAIN_SEPARATOR;

    mapping(address => uint256) public nonces;

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

    constructor(
        string memory _name,
        string memory _symbol,
        uint8 _decimals
    ) {
        name = _name;
        symbol = _symbol;
        decimals = _decimals;

        INITIAL_CHAIN_ID = block.chainid;
        INITIAL_DOMAIN_SEPARATOR = computeDomainSeparator();
    }

    /*//////////////////////////////////////////////////////////////
                               ERC20 LOGIC
    //////////////////////////////////////////////////////////////*/

    function approve(address spender, uint256 amount) public virtual returns (bool) {
        allowance[msg.sender][spender] = amount;

        emit Approval(msg.sender, spender, amount);

        return true;
    }

    function transfer(address to, uint256 amount) public virtual returns (bool) {
        balanceOf[msg.sender] -= amount;

        // Cannot overflow because the sum of all user
        // balances can't exceed the max uint256 value.
        unchecked {
            balanceOf[to] += amount;
        }

        emit Transfer(msg.sender, to, amount);

        return true;
    }

    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) public virtual returns (bool) {
        uint256 allowed = allowance[from][msg.sender]; // Saves gas for limited approvals.

        if (allowed != type(uint256).max) allowance[from][msg.sender] = allowed - amount;

        balanceOf[from] -= amount;

        // Cannot overflow because the sum of all user
        // balances can't exceed the max uint256 value.
        unchecked {
            balanceOf[to] += amount;
        }

        emit Transfer(from, to, amount);

        return true;
    }

    /*//////////////////////////////////////////////////////////////
                             EIP-2612 LOGIC
    //////////////////////////////////////////////////////////////*/

    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) public virtual {
        require(deadline >= block.timestamp, "PERMIT_DEADLINE_EXPIRED");

        // Unchecked because the only math done is incrementing
        // the owner's nonce which cannot realistically overflow.
        unchecked {
            address recoveredAddress = ecrecover(
                keccak256(
                    abi.encodePacked(
                        "\x19\x01",
                        DOMAIN_SEPARATOR(),
                        keccak256(
                            abi.encode(
                                keccak256(
                                    "Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)"
                                ),
                                owner,
                                spender,
                                value,
                                nonces[owner]++,
                                deadline
                            )
                        )
                    )
                ),
                v,
                r,
                s
            );

            require(recoveredAddress != address(0) && recoveredAddress == owner, "INVALID_SIGNER");

            allowance[recoveredAddress][spender] = value;
        }

        emit Approval(owner, spender, value);
    }

    function DOMAIN_SEPARATOR() public view virtual returns (bytes32) {
        return block.chainid == INITIAL_CHAIN_ID ? INITIAL_DOMAIN_SEPARATOR : computeDomainSeparator();
    }

    function computeDomainSeparator() internal view virtual returns (bytes32) {
        return
            keccak256(
                abi.encode(
                    keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"),
                    keccak256(bytes(name)),
                    keccak256("1"),
                    block.chainid,
                    address(this)
                )
            );
    }

    /*//////////////////////////////////////////////////////////////
                        INTERNAL MINT/BURN LOGIC
    //////////////////////////////////////////////////////////////*/

    function _mint(address to, uint256 amount) internal virtual {
        totalSupply += amount;

        // Cannot overflow because the sum of all user
        // balances can't exceed the max uint256 value.
        unchecked {
            balanceOf[to] += amount;
        }

        emit Transfer(address(0), to, amount);
    }

    function _burn(address from, uint256 amount) internal virtual {
        balanceOf[from] -= amount;

        // Cannot underflow because a user's balance
        // will never be larger than the total supply.
        unchecked {
            totalSupply -= amount;
        }

        emit Transfer(from, address(0), amount);
    }
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;

/// @notice Modern, minimalist, and gas efficient ERC-721 implementation.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/tokens/ERC721.sol)
abstract contract ERC721 {
    /*//////////////////////////////////////////////////////////////
                                 EVENTS
    //////////////////////////////////////////////////////////////*/

    event Transfer(address indexed from, address indexed to, uint256 indexed id);

    event Approval(address indexed owner, address indexed spender, uint256 indexed id);

    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    /*//////////////////////////////////////////////////////////////
                         METADATA STORAGE/LOGIC
    //////////////////////////////////////////////////////////////*/

    string public name;

    string public symbol;

    function tokenURI(uint256 id) public view virtual returns (string memory);

    /*//////////////////////////////////////////////////////////////
                      ERC721 BALANCE/OWNER STORAGE
    //////////////////////////////////////////////////////////////*/

    mapping(uint256 => address) internal _ownerOf;

    mapping(address => uint256) internal _balanceOf;

    function ownerOf(uint256 id) public view virtual returns (address owner) {
        require((owner = _ownerOf[id]) != address(0), "NOT_MINTED");
    }

    function balanceOf(address owner) public view virtual returns (uint256) {
        require(owner != address(0), "ZERO_ADDRESS");

        return _balanceOf[owner];
    }

    /*//////////////////////////////////////////////////////////////
                         ERC721 APPROVAL STORAGE
    //////////////////////////////////////////////////////////////*/

    mapping(uint256 => address) public getApproved;

    mapping(address => mapping(address => bool)) public isApprovedForAll;

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

    constructor(string memory _name, string memory _symbol) {
        name = _name;
        symbol = _symbol;
    }

    /*//////////////////////////////////////////////////////////////
                              ERC721 LOGIC
    //////////////////////////////////////////////////////////////*/

    function approve(address spender, uint256 id) public virtual {
        address owner = _ownerOf[id];

        require(msg.sender == owner || isApprovedForAll[owner][msg.sender], "NOT_AUTHORIZED");

        getApproved[id] = spender;

        emit Approval(owner, spender, id);
    }

    function setApprovalForAll(address operator, bool approved) public virtual {
        isApprovedForAll[msg.sender][operator] = approved;

        emit ApprovalForAll(msg.sender, operator, approved);
    }

    function transferFrom(
        address from,
        address to,
        uint256 id
    ) public virtual {
        require(from == _ownerOf[id], "WRONG_FROM");

        require(to != address(0), "INVALID_RECIPIENT");

        require(
            msg.sender == from || isApprovedForAll[from][msg.sender] || msg.sender == getApproved[id],
            "NOT_AUTHORIZED"
        );

        // Underflow of the sender's balance is impossible because we check for
        // ownership above and the recipient's balance can't realistically overflow.
        unchecked {
            _balanceOf[from]--;

            _balanceOf[to]++;
        }

        _ownerOf[id] = to;

        delete getApproved[id];

        emit Transfer(from, to, id);
    }

    function safeTransferFrom(
        address from,
        address to,
        uint256 id
    ) public virtual {
        transferFrom(from, to, id);

        require(
            to.code.length == 0 ||
                ERC721TokenReceiver(to).onERC721Received(msg.sender, from, id, "") ==
                ERC721TokenReceiver.onERC721Received.selector,
            "UNSAFE_RECIPIENT"
        );
    }

    function safeTransferFrom(
        address from,
        address to,
        uint256 id,
        bytes calldata data
    ) public virtual {
        transferFrom(from, to, id);

        require(
            to.code.length == 0 ||
                ERC721TokenReceiver(to).onERC721Received(msg.sender, from, id, data) ==
                ERC721TokenReceiver.onERC721Received.selector,
            "UNSAFE_RECIPIENT"
        );
    }

    /*//////////////////////////////////////////////////////////////
                              ERC165 LOGIC
    //////////////////////////////////////////////////////////////*/

    function supportsInterface(bytes4 interfaceId) public view virtual returns (bool) {
        return
            interfaceId == 0x01ffc9a7 || // ERC165 Interface ID for ERC165
            interfaceId == 0x80ac58cd || // ERC165 Interface ID for ERC721
            interfaceId == 0x5b5e139f; // ERC165 Interface ID for ERC721Metadata
    }

    /*//////////////////////////////////////////////////////////////
                        INTERNAL MINT/BURN LOGIC
    //////////////////////////////////////////////////////////////*/

    function _mint(address to, uint256 id) internal virtual {
        require(to != address(0), "INVALID_RECIPIENT");

        require(_ownerOf[id] == address(0), "ALREADY_MINTED");

        // Counter overflow is incredibly unrealistic.
        unchecked {
            _balanceOf[to]++;
        }

        _ownerOf[id] = to;

        emit Transfer(address(0), to, id);
    }

    function _burn(uint256 id) internal virtual {
        address owner = _ownerOf[id];

        require(owner != address(0), "NOT_MINTED");

        // Ownership check above ensures no underflow.
        unchecked {
            _balanceOf[owner]--;
        }

        delete _ownerOf[id];

        delete getApproved[id];

        emit Transfer(owner, address(0), id);
    }

    /*//////////////////////////////////////////////////////////////
                        INTERNAL SAFE MINT LOGIC
    //////////////////////////////////////////////////////////////*/

    function _safeMint(address to, uint256 id) internal virtual {
        _mint(to, id);

        require(
            to.code.length == 0 ||
                ERC721TokenReceiver(to).onERC721Received(msg.sender, address(0), id, "") ==
                ERC721TokenReceiver.onERC721Received.selector,
            "UNSAFE_RECIPIENT"
        );
    }

    function _safeMint(
        address to,
        uint256 id,
        bytes memory data
    ) internal virtual {
        _mint(to, id);

        require(
            to.code.length == 0 ||
                ERC721TokenReceiver(to).onERC721Received(msg.sender, address(0), id, data) ==
                ERC721TokenReceiver.onERC721Received.selector,
            "UNSAFE_RECIPIENT"
        );
    }
}

/// @notice A generic interface for a contract which properly accepts ERC721 tokens.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/tokens/ERC721.sol)
abstract contract ERC721TokenReceiver {
    function onERC721Received(
        address,
        address,
        uint256,
        bytes calldata
    ) external virtual returns (bytes4) {
        return ERC721TokenReceiver.onERC721Received.selector;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.10;

interface IVotingEscrow {
    struct LockedBalance {
        int128 amount;
        uint256 end;
    }

    function locked(address) external view returns (LockedBalance memory);

    function balanceOf(address) external view returns (uint256);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (proxy/utils/Initializable.sol)

pragma solidity ^0.8.2;

import "../../utils/Address.sol";

/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be
 * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in
 * case an upgrade adds a module that needs to be initialized.
 *
 * For example:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * contract MyToken is ERC20Upgradeable {
 *     function initialize() initializer public {
 *         __ERC20_init("MyToken", "MTK");
 *     }
 * }
 * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {
 *     function initializeV2() reinitializer(2) public {
 *         __ERC20Permit_init("MyToken");
 *     }
 * }
 * ```
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 *
 * [CAUTION]
 * ====
 * Avoid leaving a contract uninitialized.
 *
 * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
 * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke
 * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * /// @custom:oz-upgrades-unsafe-allow constructor
 * constructor() {
 *     _disableInitializers();
 * }
 * ```
 * ====
 */
abstract contract Initializable {
    /**
     * @dev Indicates that the contract has been initialized.
     * @custom:oz-retyped-from bool
     */
    uint8 private _initialized;

    /**
     * @dev Indicates that the contract is in the process of being initialized.
     */
    bool private _initializing;

    /**
     * @dev Triggered when the contract has been initialized or reinitialized.
     */
    event Initialized(uint8 version);

    /**
     * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,
     * `onlyInitializing` functions can be used to initialize parent contracts. Equivalent to `reinitializer(1)`.
     */
    modifier initializer() {
        bool isTopLevelCall = _setInitializedVersion(1);
        if (isTopLevelCall) {
            _initializing = true;
        }
        _;
        if (isTopLevelCall) {
            _initializing = false;
            emit Initialized(1);
        }
    }

    /**
     * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the
     * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be
     * used to initialize parent contracts.
     *
     * `initializer` is equivalent to `reinitializer(1)`, so a reinitializer may be used after the original
     * initialization step. This is essential to configure modules that are added through upgrades and that require
     * initialization.
     *
     * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in
     * a contract, executing them in the right order is up to the developer or operator.
     */
    modifier reinitializer(uint8 version) {
        bool isTopLevelCall = _setInitializedVersion(version);
        if (isTopLevelCall) {
            _initializing = true;
        }
        _;
        if (isTopLevelCall) {
            _initializing = false;
            emit Initialized(version);
        }
    }

    /**
     * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
     * {initializer} and {reinitializer} modifiers, directly or indirectly.
     */
    modifier onlyInitializing() {
        require(_initializing, "Initializable: contract is not initializing");
        _;
    }

    /**
     * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.
     * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized
     * to any version. It is recommended to use this to lock implementation contracts that are designed to be called
     * through proxies.
     */
    function _disableInitializers() internal virtual {
        _setInitializedVersion(type(uint8).max);
    }

    function _setInitializedVersion(uint8 version) private returns (bool) {
        // If the contract is initializing we ignore whether _initialized is set in order to support multiple
        // inheritance patterns, but we only do this in the context of a constructor, and for the lowest level
        // of initializers, because in other contexts the contract may have been reentered.
        if (_initializing) {
            require(
                version == 1 && !Address.isContract(address(this)),
                "Initializable: contract is already initialized"
            );
            return false;
        } else {
            require(_initialized < version, "Initializable: contract is already initialized");
            _initialized = version;
            return true;
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(owner() == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity =0.8.10;

import {ERC20} from "@rari-capital/solmate/src/tokens/ERC20.sol";
import {ERC721, ERC721TokenReceiver} from "@rari-capital/solmate/src/tokens/ERC721.sol";
import {SafeTransferLib} from "@rari-capital/solmate/src/utils/SafeTransferLib.sol";
import {Controlled} from "../utils/Controlled.sol";
import {Renderer} from "./render/Renderer.sol";

/// @notice Non-fungible, limited-transferable token that grants citizen status in Nation3.
/// @author Nation3 (https://github.com/nation3/app/blob/main/contracts/contracts/passport/Passport.sol).
/// @dev Most ERC721 operations are restricted to controller contract.
/// @dev Is modified from the EIP-721 because of the lack of enough integration of the EIP-4973 at the moment of development.
/// @dev Token metadata is renderer on-chain through an external contract.
contract Passport is ERC721, Controlled {
    /*///////////////////////////////////////////////////////////////
                               LIBRARIES
    //////////////////////////////////////////////////////////////*/

    using SafeTransferLib for ERC20;

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

    error NotMinted();
    error NotAuthorized();
    error InvalidFrom();
    error NotSafeRecipient();

    /*///////////////////////////////////////////////////////////////
                            STORAGE
    //////////////////////////////////////////////////////////////*/

    // @notice On-chain metadata renderer.
    Renderer public renderer;

    /// @dev Tracks the number of tokens minted & not burned.
    uint256 internal _supply;
    /// @dev Tracks the next id to mint.
    uint256 internal _idTracker;

    // @dev Timestamp of each token mint.
    mapping(uint256 => uint256) internal _timestampOf;
    // @dev Authorized address to sign messages in behalf of the passport holder, it can be different from the owner.
    // @dev Could be used for IRL events authentication.
    mapping(uint256 => address) internal _signerOf;

    /*///////////////////////////////////////////////////////////////
                            VIEWS
    //////////////////////////////////////////////////////////////*/

    /// @notice Returns total number of tokens in supply.
    function totalSupply() external view virtual returns (uint256) {
        return _supply;
    }

    /// @notice Gets next id to mint.
    function getNextId() external view virtual returns (uint256) {
        return _idTracker;
    }

    /// @notice Returns the timestamp of the mint of a token.
    /// @param id Token to retrieve timestamp from.
    function timestampOf(uint256 id) public view virtual returns (uint256) {
        if (_ownerOf[id] == address(0)) revert NotMinted();
        return _timestampOf[id];
    }

    /// @notice Returns the authorized signer of a token.
    /// @param id Token to retrieve signer from.
    function signerOf(uint256 id) external view virtual returns (address) {
        if (_ownerOf[id] == address(0)) revert NotMinted();
        return _signerOf[id];
    }

    /// @notice Get encoded metadata from renderer.
    /// @param id Token to retrieve metadata from.
    function tokenURI(uint256 id) public view override returns (string memory) {
        return renderer.render(id, ownerOf(id), timestampOf(id));
    }

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

    /// @dev Sets name & symbol.
    constructor(string memory _name, string memory _symbol) ERC721(_name, _symbol) {}

    /*///////////////////////////////////////////////////////////////
                       USER ACTIONS
    //////////////////////////////////////////////////////////////*/

    /// @notice Allows the owner of a passport to update the signer.
    /// @param id Token to update the signer.
    /// @param signer Address of the new signer account.
    function setSigner(uint256 id, address signer) external virtual {
        if (_ownerOf[id] != msg.sender) revert NotAuthorized();
        _signerOf[id] = signer;
    }

    /*///////////////////////////////////////////////////////////////
                       CONTROLLED ACTIONS
    //////////////////////////////////////////////////////////////*/

    /// @notice ERC721 method to set allowance. Only allowed to controller.
    /// @dev Prevent approvals on marketplaces & other contracts.
    function approve(address spender, uint256 id) public override onlyController {
        getApproved[id] = spender;

        emit Approval(_ownerOf[id], spender, id);
    }

    /// @notice ERC721 method to set allowance. Only allowed to controller.
    /// @dev Prevent approvals on marketplaces & other contracts.
    function setApprovalForAll(address operator, bool approved) public override onlyController {
        isApprovedForAll[msg.sender][operator] = approved;

        emit ApprovalForAll(msg.sender, operator, approved);
    }

    /// @notice Allows controller to transfer a passport (id) between two addresses.
    /// @param from Current owner of the token.
    /// @param to Recipient of the token.
    /// @param id Token to transfer.
    function transferFrom(
        address from,
        address to,
        uint256 id
    ) public override onlyController {
        if (from != _ownerOf[id]) revert InvalidFrom();
        if (to == address(0)) revert TargetIsZeroAddress();

        unchecked {
            _balanceOf[from]--;
            _balanceOf[to]++;
        }

        _ownerOf[id] = to;
        _timestampOf[id] = block.timestamp;
        _signerOf[id] = to;

        delete getApproved[id];

        emit Transfer(from, to, id);
    }

    /// @notice Allows controller to safe transfer a passport (id) between two address.
    /// @param from Curent owner of the token.
    /// @param to Recipient of the token.
    /// @param id Token to transfer.
    function safeTransferFrom(
        address from,
        address to,
        uint256 id
    ) public override onlyController {
        transferFrom(from, to, id);

        if (
            to.code.length != 0 &&
            ERC721TokenReceiver(to).onERC721Received(msg.sender, from, id, "") !=
            ERC721TokenReceiver.onERC721Received.selector
        ) revert NotSafeRecipient();
    }

    /// @notice Allows controller to safe transfer a passport (id) between two address.
    /// @param from Curent owner of the token.
    /// @param to Recipient of the token.
    /// @param id Token to transfer.
    function safeTransferFrom(
        address from,
        address to,
        uint256 id,
        bytes calldata data
    ) public override onlyController {
        transferFrom(from, to, id);

        if (
            to.code.length != 0 &&
            ERC721TokenReceiver(to).onERC721Received(msg.sender, from, id, data) !=
            ERC721TokenReceiver.onERC721Received.selector
        ) revert NotSafeRecipient();
    }

    /// @notice Mints a new passport to the recipient.
    /// @param to Token recipient.
    /// @dev Id is auto assigned.
    function mint(address to) external virtual onlyController returns (uint256 tokenId) {
        tokenId = _idTracker;
        _mint(to, tokenId);

        // Realistically won't overflow;
        unchecked {
            _timestampOf[tokenId] = block.timestamp;
            _signerOf[tokenId] = to;
            _idTracker++;
            _supply++;
        }
    }

    /// @notice Mints a new passport to the recipient.
    /// @param to Token recipient.
    /// @dev Id is auto assigned.
    function safeMint(address to) external virtual onlyController returns (uint256 tokenId) {
        tokenId = _idTracker;
        _safeMint(to, tokenId);

        // Realistically won't overflow;
        unchecked {
            _timestampOf[tokenId] = block.timestamp;
            _signerOf[tokenId] = to;
            _idTracker++;
            _supply++;
        }
    }

    /// @notice Burns the specified token.
    /// @param id Token to burn.
    function burn(uint256 id) external virtual onlyController {
        _burn(id);

        // Would have reverted before if the token wasnt minted
        unchecked {
            delete _timestampOf[id];
            delete _signerOf[id];
            _supply--;
        }
    }

    /*///////////////////////////////////////////////////////////////
                       ADMIN ACTIONS
    //////////////////////////////////////////////////////////////*/

    /// @notice Allows the owner to update the renderer contract.
    /// @param _renderer New renderer address.
    function setRenderer(Renderer _renderer) external virtual onlyOwner {
        renderer = _renderer;
    }

    /// @notice Allows the owner to withdraw any ERC20 sent to the contract.
    /// @param token Token to withdraw.
    /// @param to Recipient address of the tokens.
    function recoverTokens(ERC20 token, address to) external virtual onlyOwner returns (uint256 amount) {
        amount = token.balanceOf(address(this));
        token.safeTransfer(to, amount);
    }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity 0.8.10;

import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
import {Initializable} from "@openzeppelin/contracts/proxy/utils/Initializable.sol";
import {ERC20} from "@rari-capital/solmate/src/tokens/ERC20.sol";
import {SafeTransferLib} from "@rari-capital/solmate/src/utils/SafeTransferLib.sol";
import {IVotingEscrow} from "../governance/IVotingEscrow.sol";
import {Passport} from "./Passport.sol";

/// @notice Manage the issuance of Passport tokens.
/// @author Nation3 (https://github.com/nation3/app/blob/main/contracts/contracts/passport/PassportIssuer.sol).
contract PassportIssuer is Initializable, Ownable {
    /*///////////////////////////////////////////////////////////////
                               LIBRARIES
    //////////////////////////////////////////////////////////////*/

    using SafeTransferLib for ERC20;
    using SafeTransferLib for IVotingEscrow;

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

    error NotEligible();
    error NonRevocable();
    error InvalidSignature();
    error PassportAlreadyIssued();
    error PassportNotIssued();
    error IssuanceIsDisabled();
    error IssuancesLimitReached();

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

    /// @dev Events inspired by EIP-4973
    event Attest(address indexed _to, uint256 indexed _tokenId);
    event Revoke(address indexed _to, uint256 indexed _tokenId);

    event UpdateRequirements(uint256 claimRequiredBalance, uint256 revokeUnderBalance);

    /*///////////////////////////////////////////////////////////////
                                 STORAGE
    //////////////////////////////////////////////////////////////*/

    /// @notice The token used to lock.
    IVotingEscrow public veToken;
    /// @notice The token that issues.
    Passport public passToken;

    /// @notice Status of the passport issance.
    bool public enabled;

    /// @notice Limit of passports to issue, cannot be change after initialization.
    uint256 public maxIssuances;
    /// @notice Number of passports issued.
    uint256 public totalIssued;
    /// @notice Balance of veToken required to claim.
    uint256 public claimRequiredBalance;
    /// @notice Balance of veToken under which a passport is revocable.
    uint256 public revokeUnderBalance;

    /// @notice Agreement statement to sign before claim.
    string public statement;
    /// @notice Agreement terms URL to sign before claim.
    string public termsURI;

    /// @dev Domain separator hash on initialization.
    bytes32 internal INITIAL_DOMAIN_SEPARATOR;

    /// @dev Map the passport status of an account: (0) Not issued, (1) Issued, (2) Revoked.
    mapping(address => uint8) internal _status;
    /// @dev Passport id issued by account.
    mapping(address => uint256) internal _passportId;

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

    /// @notice Requires to be enabled before performing function.
    modifier isEnabled() {
        if (!enabled) revert IssuanceIsDisabled();
        _;
    }

    /*///////////////////////////////////////////////////////////////
                               INITIALITION
    //////////////////////////////////////////////////////////////*/

    /// @notice Sets tokens and supply.
    /// @param _veToken Lock token which balance is required to claim.
    /// @param _passToken Passport token to mint.
    /// @param _maxIssuances Maximum number of tokens that can be issued with this contract.
    function initialize(
        IVotingEscrow _veToken,
        Passport _passToken,
        uint256 _maxIssuances
    ) external initializer {
        veToken = _veToken;
        passToken = _passToken;
        maxIssuances = _maxIssuances;
        INITIAL_DOMAIN_SEPARATOR = computeDomainSeparator();
    }

    /*///////////////////////////////////////////////////////////////
                                  VIEWS
    //////////////////////////////////////////////////////////////*/

    /// @notice Returns the status of an account: (0) Not issued, (1) Issued, (2) Revoked.
    function passportStatus(address account) external view virtual returns (uint8) {
        return _status[account];
    }

    /// @notice Returns passport id of a given account.
    /// @param account Holder account of a passport.
    /// @dev Revert if the account has no passport.
    function passportId(address account) public view virtual returns (uint256) {
        if (_status[account] == 0) revert PassportNotIssued();
        return _passportId[account];
    }

    /*///////////////////////////////////////////////////////////////
                                USER ACTIONS
    //////////////////////////////////////////////////////////////*/

    /// @notice Claims a new passport token with signature validation.
    /// @param v Signature version.
    /// @param r Signature fragment.
    /// @param s Signature fragment.
    function claim(
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external virtual isEnabled {
        if (totalIssued >= maxIssuances) revert IssuancesLimitReached();
        if (_status[msg.sender] > 0) revert PassportAlreadyIssued();
        if (veToken.balanceOf(msg.sender) < claimRequiredBalance) revert NotEligible();
        verifySignature(v, r, s);

        _issue(msg.sender);
    }

    /// @notice Allows caller to renounce to the passport.
    function renounce() external virtual {
        _revoke(msg.sender);
    }

    /// @notice Revokes the passport of a given account if it's not eligible anymore.
    function revoke(address account) external virtual {
        if (veToken.balanceOf(account) >= revokeUnderBalance) revert NonRevocable();
        _revoke(account);
    }

    /*///////////////////////////////////////////////////////////////
                              ADMIN ACTIONS
    //////////////////////////////////////////////////////////////*/

    /// @notice Set requirements to claim & revoke.
    /// @param _claimRequiredBalance Minimum amount of voting escrow tokens required for a new issuance.
    /// @param _revokeUnderBalance Amount of voting escrow tokens under which a passport is revocable.
    function setParams(uint256 _claimRequiredBalance, uint256 _revokeUnderBalance) external virtual onlyOwner {
        claimRequiredBalance = _claimRequiredBalance;
        revokeUnderBalance = _revokeUnderBalance;

        emit UpdateRequirements(_claimRequiredBalance, _revokeUnderBalance);
    }

    /// @notice Updates issuance status.
    /// @dev Can be used by the owner to halt the issuance of new passports.
    function setEnabled(bool status) external virtual onlyOwner {
        enabled = status;
    }

    /// @notice Sets the statement of the issuance agreement.
    function setStatement(string memory _statement) external virtual onlyOwner {
        statement = _statement;
    }

    /// @notice Sets the terms URI of the issuance agreement.
    function setTermsURI(string memory _termsURI) external virtual onlyOwner {
        termsURI = _termsURI;
    }

    /// @notice Allows the owner to revoke the passport of any account.
    function adminRevoke(address account) external virtual onlyOwner {
        _revoke(account);
    }

    /// @notice Allows the owner to withdraw any ERC20 sent to the contract.
    /// @param token Token to withdraw.
    /// @param to Recipient address of the tokens.
    function recoverTokens(ERC20 token, address to) external virtual onlyOwner returns (uint256 amount) {
        amount = token.balanceOf(address(this));
        token.safeTransfer(to, amount);
    }

    /*///////////////////////////////////////////////////////////////
                             EIP-712 LOGIC
    //////////////////////////////////////////////////////////////*/

    /// @notice Returns the domain separator hash for EIP-712 signature.
    function DOMAIN_SEPARATOR() public view virtual returns (bytes32) {
        return INITIAL_DOMAIN_SEPARATOR != "" ? INITIAL_DOMAIN_SEPARATOR : computeDomainSeparator();
    }

    /// @notice Verify if sender has signed the contract agreement following EIP-712.
    /// @dev Reverts on signature missmatch.
    function verifySignature(
        uint8 v,
        bytes32 r,
        bytes32 s
    ) public virtual {
        // Unchecked because no math here
        unchecked {
            address signer = ecrecover(
                keccak256(
                    abi.encodePacked(
                        "\x19\x01",
                        DOMAIN_SEPARATOR(),
                        keccak256(
                            abi.encode(
                                keccak256("Agreement(string statement,string termsURI)"),
                                keccak256(abi.encodePacked(statement)),
                                keccak256(abi.encodePacked(termsURI))
                            )
                        )
                    )
                ),
                v,
                r,
                s
            );

            if (signer != msg.sender) revert InvalidSignature();
        }
    }

    // @dev Compute the EIP-712 domain's separator of the contract.
    function computeDomainSeparator() internal view virtual returns (bytes32) {
        return
            keccak256(
                abi.encode(
                    keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"),
                    keccak256(bytes("PassportIssuer")),
                    keccak256("1"),
                    block.chainid,
                    address(this)
                )
            );
    }

    /*///////////////////////////////////////////////////////////////
                             INTERNAL LOGIC
    //////////////////////////////////////////////////////////////*/

    /// @dev Mints a new passport token for the recipient.
    /// @param recipient Address to issue the passport to.
    function _issue(address recipient) internal virtual {
        // Mint a new passport to the recipient account
        uint256 tokenId = passToken.safeMint(recipient);

        // Realistically won't overflow;
        unchecked {
            totalIssued++;
        }

        _status[recipient] = 1;
        _passportId[recipient] = tokenId;

        emit Attest(recipient, tokenId);
    }

    /// @dev Burns the passport token of the account.
    /// @param account Address of the account to revoke the passport to.
    function _revoke(address account) internal virtual {
        uint256 tokenId = passportId(account);

        // Burn passport
        passToken.burn(tokenId);

        _status[account] = 2;
        delete _passportId[account];

        emit Revoke(account, tokenId);
    }
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity =0.8.10;

import {Strings} from "@openzeppelin/contracts/utils/Strings.sol";

contract Renderer {
    function render(
        uint256 tokenId,
        address owner,
        uint256 timestamp
    ) public view virtual returns (string memory tokenURI) {
        string memory name = Strings.toString(uint256(uint160(owner)));
        tokenURI = string(abi.encodePacked(Strings.toString(tokenId),'-',name,'-',Strings.toString(timestamp)));
    }
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;

import {ERC20} from "../tokens/ERC20.sol";

/// @notice Safe ETH and ERC20 transfer library that gracefully handles missing return values.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/utils/SafeTransferLib.sol)
/// @dev Use with caution! Some functions in this library knowingly create dirty bits at the destination of the free memory pointer.
/// @dev Note that none of the functions in this library check that a token has code at all! That responsibility is delegated to the caller.
library SafeTransferLib {
    /*//////////////////////////////////////////////////////////////
                             ETH OPERATIONS
    //////////////////////////////////////////////////////////////*/

    function safeTransferETH(address to, uint256 amount) internal {
        bool success;

        assembly {
            // Transfer the ETH and store if it succeeded or not.
            success := call(gas(), to, amount, 0, 0, 0, 0)
        }

        require(success, "ETH_TRANSFER_FAILED");
    }

    /*//////////////////////////////////////////////////////////////
                            ERC20 OPERATIONS
    //////////////////////////////////////////////////////////////*/

    function safeTransferFrom(
        ERC20 token,
        address from,
        address to,
        uint256 amount
    ) internal {
        bool success;

        assembly {
            // Get a pointer to some free memory.
            let freeMemoryPointer := mload(0x40)

            // Write the abi-encoded calldata into memory, beginning with the function selector.
            mstore(freeMemoryPointer, 0x23b872dd00000000000000000000000000000000000000000000000000000000)
            mstore(add(freeMemoryPointer, 4), from) // Append the "from" argument.
            mstore(add(freeMemoryPointer, 36), to) // Append the "to" argument.
            mstore(add(freeMemoryPointer, 68), amount) // Append the "amount" argument.

            success := and(
                // Set success to whether the call reverted, if not we check it either
                // returned exactly 1 (can't just be non-zero data), or had no return data.
                or(and(eq(mload(0), 1), gt(returndatasize(), 31)), iszero(returndatasize())),
                // We use 100 because the length of our calldata totals up like so: 4 + 32 * 3.
                // We use 0 and 32 to copy up to 32 bytes of return data into the scratch space.
                // Counterintuitively, this call must be positioned second to the or() call in the
                // surrounding and() call or else returndatasize() will be zero during the computation.
                call(gas(), token, 0, freeMemoryPointer, 100, 0, 32)
            )
        }

        require(success, "TRANSFER_FROM_FAILED");
    }

    function safeTransfer(
        ERC20 token,
        address to,
        uint256 amount
    ) internal {
        bool success;

        assembly {
            // Get a pointer to some free memory.
            let freeMemoryPointer := mload(0x40)

            // Write the abi-encoded calldata into memory, beginning with the function selector.
            mstore(freeMemoryPointer, 0xa9059cbb00000000000000000000000000000000000000000000000000000000)
            mstore(add(freeMemoryPointer, 4), to) // Append the "to" argument.
            mstore(add(freeMemoryPointer, 36), amount) // Append the "amount" argument.

            success := and(
                // Set success to whether the call reverted, if not we check it either
                // returned exactly 1 (can't just be non-zero data), or had no return data.
                or(and(eq(mload(0), 1), gt(returndatasize(), 31)), iszero(returndatasize())),
                // We use 68 because the length of our calldata totals up like so: 4 + 32 * 2.
                // We use 0 and 32 to copy up to 32 bytes of return data into the scratch space.
                // Counterintuitively, this call must be positioned second to the or() call in the
                // surrounding and() call or else returndatasize() will be zero during the computation.
                call(gas(), token, 0, freeMemoryPointer, 68, 0, 32)
            )
        }

        require(success, "TRANSFER_FAILED");
    }

    function safeApprove(
        ERC20 token,
        address to,
        uint256 amount
    ) internal {
        bool success;

        assembly {
            // Get a pointer to some free memory.
            let freeMemoryPointer := mload(0x40)

            // Write the abi-encoded calldata into memory, beginning with the function selector.
            mstore(freeMemoryPointer, 0x095ea7b300000000000000000000000000000000000000000000000000000000)
            mstore(add(freeMemoryPointer, 4), to) // Append the "to" argument.
            mstore(add(freeMemoryPointer, 36), amount) // Append the "amount" argument.

            success := and(
                // Set success to whether the call reverted, if not we check it either
                // returned exactly 1 (can't just be non-zero data), or had no return data.
                or(and(eq(mload(0), 1), gt(returndatasize(), 31)), iszero(returndatasize())),
                // We use 68 because the length of our calldata totals up like so: 4 + 32 * 2.
                // We use 0 and 32 to copy up to 32 bytes of return data into the scratch space.
                // Counterintuitively, this call must be positioned second to the or() call in the
                // surrounding and() call or else returndatasize() will be zero during the computation.
                call(gas(), token, 0, freeMemoryPointer, 68, 0, 32)
            )
        }

        require(success, "APPROVE_FAILED");
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Strings.sol)

pragma solidity ^0.8.0;

/**
 * @dev String operations.
 */
library Strings {
    bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef";

    /**
     * @dev Converts a `uint256` to its ASCII `string` decimal representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        // Inspired by OraclizeAPI's implementation - MIT licence
        // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol

        if (value == 0) {
            return "0";
        }
        uint256 temp = value;
        uint256 digits;
        while (temp != 0) {
            digits++;
            temp /= 10;
        }
        bytes memory buffer = new bytes(digits);
        while (value != 0) {
            digits -= 1;
            buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));
            value /= 10;
        }
        return string(buffer);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
     */
    function toHexString(uint256 value) internal pure returns (string memory) {
        if (value == 0) {
            return "0x00";
        }
        uint256 temp = value;
        uint256 length = 0;
        while (temp != 0) {
            length++;
            temp >>= 8;
        }
        return toHexString(value, length);
    }

    /**
     * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
     */
    function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
        bytes memory buffer = new bytes(2 * length + 2);
        buffer[0] = "0";
        buffer[1] = "x";
        for (uint256 i = 2 * length + 1; i > 1; --i) {
            buffer[i] = _HEX_SYMBOLS[value & 0xf];
            value >>= 4;
        }
        require(value == 0, "Strings: hex length insufficient");
        return string(buffer);
    }
}

{
  "compilationTarget": {
    "src/passport/PassportIssuer.sol": "PassportIssuer"
  },
  "evmVersion": "london",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": true,
    "runs": 2000
  },
  "remappings": []
}