// File: contracts/magic-crv/CurveVoter.sol



// SPDX-License-Identifier: MIT
// Inspired by Yearn CurveYCRVVoter and StrategyProxy
// solhint-disable not-rely-on-time
pragma solidity ^0.8.10;

import "@rari-capital/solmate/src/utils/SafeTransferLib.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "../interfaces/curve/IFeeDistributor.sol";
import "../interfaces/curve/IVoteEscrow.sol";
import "../interfaces/curve/IGaugeController.sol";

contract CurveVoter is Ownable {
    using SafeTransferLib for ERC20;

    error NotAllowedVoter();
    error NotMagicCRV();
    error NotAuthorized();

    uint256 public constant MAX_LOCKTIME = 4 * 365 * 86400; // 4 years

    ERC20 public constant CRV = ERC20(0xD533a949740bb3306d119CC777fa900bA034cd52);
    address public constant ESCROW = 0x5f3b5DfEb7B28CDbD7FAba78963EE202a494e2A2;
    address public constant GAUGE_CONTROLLER = 0x2F50D538606Fa9EDD2B11E2446BEb18C9D5846bB;
    address public constant FEE_DISTRIBUTOR = 0xA464e6DCda8AC41e03616F95f4BC98a13b8922Dc;
    address public constant CRV3 = 0x6c3F90f043a72FA612cbac8115EE7e52BDe6E490;
    address public constant MIM_GAUGE = 0xd8b712d29381748dB89c36BCa0138d7c75866ddF;
    uint256 public constant MAX_VOTE_WEIGHT = 10_000;

    mapping(address => bool) public voters;

    uint256 public lastClaimTimestamp;
    uint256 public totalCRVTokens;
    address public magicCRV;
    address public harvester;

    modifier onlyAllowedVoters() {
        if (!voters[msg.sender] && msg.sender != owner()) {
            revert NotAllowedVoter();
        }
        _;
    }

    modifier onlyHarvester() {
        if (msg.sender != harvester) {
            revert NotMagicCRV();
        }
        _;
    }

    modifier onlyAllowedLockers() {
        if (msg.sender != magicCRV && msg.sender != owner() && msg.sender != harvester) {
            revert NotAuthorized();
        }
        _;
    }

    function setAllowedVoter(address voter, bool allowed) external onlyOwner {
        voters[voter] = allowed;
    }

    function setMagicCRV(address _magicCRV) external onlyOwner {
        magicCRV = _magicCRV;
    }

    function setHarvester(address _harvester) external onlyOwner {
        harvester = _harvester;
    }

    /// @notice amount 10000 = 100%
    function voteForGaugeWeights(address gauge, uint256 amount) public onlyAllowedVoters {
        IGaugeController(GAUGE_CONTROLLER).vote_for_gauge_weights(gauge, amount);
    }

    function voteForMaxMIMGaugeWeights() public onlyAllowedVoters {
        IGaugeController(GAUGE_CONTROLLER).vote_for_gauge_weights(MIM_GAUGE, MAX_VOTE_WEIGHT);
    }

    function claim(address recipient) external onlyHarvester returns (uint256 amount) {
        if (block.timestamp < lastClaimTimestamp + 7 days) {
            return 0;
        }

        amount = IFeeDistributor(FEE_DISTRIBUTOR).claim(address(this));
        lastClaimTimestamp = IFeeDistributor(FEE_DISTRIBUTOR).time_cursor_of(address(this));

        if (amount > 0) {
            ERC20(CRV3).transfer(recipient, amount);
        }
    }

    function claimAll(address recipient) external onlyHarvester returns (uint256 amount) {
        if (block.timestamp < lastClaimTimestamp + 7 days) {
            return 0;
        }

        address p = address(this);

        // curve claims are divided by weeks and each iterate can claim up to 20 weeks of rewards.
        IFeeDistributor(FEE_DISTRIBUTOR).claim_many([p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p, p]);
        lastClaimTimestamp = IFeeDistributor(FEE_DISTRIBUTOR).time_cursor_of(p);

        amount = ERC20(CRV3).balanceOf(address(this));
        if (amount > 0) {
            ERC20(CRV3).transfer(recipient, amount);
        }
    }

    /// @notice add amount to the current lock created with `createLock` or `createMaxLock`
    function lock() external onlyAllowedLockers {
        uint256 amount = ERC20(CRV).balanceOf(address(this));
        if (amount > 0) {
            CRV.safeApprove(ESCROW, 0);
            CRV.safeApprove(ESCROW, amount);
            IVoteEscrow(ESCROW).increase_amount(amount);
            totalCRVTokens += amount;
        }
    }

    /// @notice creates a 4 years lock
    function createMaxLock(uint256 value) external onlyOwner {
        // solhint-disable-next-line not-rely-on-time
        _createLock(value, block.timestamp + MAX_LOCKTIME);
    }

    function createLock(uint256 value, uint256 unlockTime) external onlyOwner {
        _createLock(value, unlockTime);
    }

    /// @notice extend to 4 years lock
    function increaseMaxLock() external onlyOwner {
        // solhint-disable-next-line not-rely-on-time
        _increaseLock(block.timestamp + MAX_LOCKTIME);
    }

    function increaseLock(uint256 unlockTime) external onlyOwner {
        _increaseLock(unlockTime);
    }

    function _createLock(uint256 value, uint256 unlockTime) internal {
        CRV.safeApprove(ESCROW, 0);
        CRV.safeApprove(ESCROW, value);
        IVoteEscrow(ESCROW).create_lock(value, unlockTime);
    }

    function _increaseLock(uint256 unlockTime) internal {
        IVoteEscrow(ESCROW).increase_unlock_time(unlockTime);
    }

    function release() external onlyOwner {
        IVoteEscrow(ESCROW).withdraw();
    }

    function withdraw(
        ERC20 token,
        address to,
        uint256 amount
    ) external onlyOwner {
        token.safeTransfer(to, amount);
    }
}

// File: @rari-capital/solmate/src/utils/SafeTransferLib.sol



// 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 Modified from Gnosis (https://github.com/gnosis/gp-v2-contracts/blob/main/src/contracts/libraries/GPv2SafeERC20.sol)
/// @dev Use with caution! Some functions in this library knowingly create dirty bits at the destination of the free memory pointer.
library SafeTransferLib {
    /*///////////////////////////////////////////////////////////////
                            ETH OPERATIONS
    //////////////////////////////////////////////////////////////*/

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

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

        require(callStatus, "ETH_TRANSFER_FAILED");
    }

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

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

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

            // Write the abi-encoded calldata to memory piece by piece:
            mstore(freeMemoryPointer, 0x23b872dd00000000000000000000000000000000000000000000000000000000) // Begin with the function selector.
            mstore(add(freeMemoryPointer, 4), and(from, 0xffffffffffffffffffffffffffffffffffffffff)) // Mask and append the "from" argument.
            mstore(add(freeMemoryPointer, 36), and(to, 0xffffffffffffffffffffffffffffffffffffffff)) // Mask and append the "to" argument.
            mstore(add(freeMemoryPointer, 68), amount) // Finally append the "amount" argument. No mask as it's a full 32 byte value.

            // Call the token and store if it succeeded or not.
            // We use 100 because the calldata length is 4 + 32 * 3.
            callStatus := call(gas(), token, 0, freeMemoryPointer, 100, 0, 0)
        }

        require(didLastOptionalReturnCallSucceed(callStatus), "TRANSFER_FROM_FAILED");
    }

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

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

            // Write the abi-encoded calldata to memory piece by piece:
            mstore(freeMemoryPointer, 0xa9059cbb00000000000000000000000000000000000000000000000000000000) // Begin with the function selector.
            mstore(add(freeMemoryPointer, 4), and(to, 0xffffffffffffffffffffffffffffffffffffffff)) // Mask and append the "to" argument.
            mstore(add(freeMemoryPointer, 36), amount) // Finally append the "amount" argument. No mask as it's a full 32 byte value.

            // Call the token and store if it succeeded or not.
            // We use 68 because the calldata length is 4 + 32 * 2.
            callStatus := call(gas(), token, 0, freeMemoryPointer, 68, 0, 0)
        }

        require(didLastOptionalReturnCallSucceed(callStatus), "TRANSFER_FAILED");
    }

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

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

            // Write the abi-encoded calldata to memory piece by piece:
            mstore(freeMemoryPointer, 0x095ea7b300000000000000000000000000000000000000000000000000000000) // Begin with the function selector.
            mstore(add(freeMemoryPointer, 4), and(to, 0xffffffffffffffffffffffffffffffffffffffff)) // Mask and append the "to" argument.
            mstore(add(freeMemoryPointer, 36), amount) // Finally append the "amount" argument. No mask as it's a full 32 byte value.

            // Call the token and store if it succeeded or not.
            // We use 68 because the calldata length is 4 + 32 * 2.
            callStatus := call(gas(), token, 0, freeMemoryPointer, 68, 0, 0)
        }

        require(didLastOptionalReturnCallSucceed(callStatus), "APPROVE_FAILED");
    }

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

    function didLastOptionalReturnCallSucceed(bool callStatus) private pure returns (bool success) {
        assembly {
            // Get how many bytes the call returned.
            let returnDataSize := returndatasize()

            // If the call reverted:
            if iszero(callStatus) {
                // Copy the revert message into memory.
                returndatacopy(0, 0, returnDataSize)

                // Revert with the same message.
                revert(0, returnDataSize)
            }

            switch returnDataSize
            case 32 {
                // Copy the return data into memory.
                returndatacopy(0, 0, returnDataSize)

                // Set success to whether it returned true.
                success := iszero(iszero(mload(0)))
            }
            case 0 {
                // There was no return data.
                success := 1
            }
            default {
                // It returned some malformed input.
                success := 0
            }
        }
    }
}

// File: @openzeppelin/contracts/access/Ownable.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (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);
    }
}

// File: contracts/interfaces/curve/IFeeDistributor.sol



// SPDX-License-Identifier: MIT
// solhint-disable func-name-mixedcase

pragma solidity >=0.6.12;

interface IFeeDistributor {
    function claim(address account) external returns (uint256);

    function claim_many(address[20] calldata) external returns (bool);

    function last_token_time() external view returns (uint256);

    function time_cursor() external view returns (uint256);

    function time_cursor_of(address) external view returns (uint256);

    function checkpoint_token() external;
}

// File: contracts/interfaces/curve/IVoteEscrow.sol



// SPDX-License-Identifier: MIT
// solhint-disable func-name-mixedcase

pragma solidity >=0.6.12;

interface IVoteEscrow {
    function create_lock(uint256, uint256) external;

    function increase_amount(uint256) external;

    function increase_unlock_time(uint256) external;

    function withdraw() external;
}

// File: contracts/interfaces/curve/IGaugeController.sol



// SPDX-License-Identifier: MIT
// solhint-disable func-name-mixedcase

pragma solidity >=0.6.12;

interface IGaugeController {
    function vote_for_gauge_weights(address, uint256) external;
}
// File: @rari-capital/solmate/src/tokens/ERC20.sol



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

/// @notice Modern and gas efficient ERC20 + EIP-2612 implementation.
/// @author Modified from Uniswap (https://github.com/Uniswap/uniswap-v2-core/blob/master/contracts/UniswapV2ERC20.sol)
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
    //////////////////////////////////////////////////////////////*/

    bytes32 public constant PERMIT_TYPEHASH =
        keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");

    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) {
        if (allowance[from][msg.sender] != type(uint256).max) {
            allowance[from][msg.sender] -= 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 {
            bytes32 digest = keccak256(
                abi.encodePacked(
                    "\x19\x01",
                    DOMAIN_SEPARATOR(),
                    keccak256(abi.encode(PERMIT_TYPEHASH, owner, spender, value, nonces[owner]++, deadline))
                )
            );

            address recoveredAddress = ecrecover(digest, v, r, s);
            require(recoveredAddress != address(0) && recoveredAddress == owner, "INVALID_PERMIT_SIGNATURE");

            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(bytes("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);
    }
}

// File: @openzeppelin/contracts/utils/Context.sol



// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.0 (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;
    }
}