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

import {Ownable} from "openzeppelin-contracts/contracts/access/Ownable.sol";
import {Ownable2Step} from "openzeppelin-contracts/contracts/access/Ownable2Step.sol";
import {IGrant} from "../IGrant.sol";

contract FirstClaim is Ownable2Step {
    ////////////////////////////////////////////////////////////////
    //                           ERRORS                           //
    ////////////////////////////////////////////////////////////////

    /// @notice Error that is thrown if the caller is not allowed to call the function
    error OnlyAllowedCaller();

    /// @notice Error that is thrown if a proposed configuration address is the zero address
    error ZeroAddress();

    /// @notice Error that is thrown if the grant amount is too large
    error GrantAmountTooLarge();

    /// @notice Error that is thrown if the max claim amount is exceeded
    error MaxClaimAmountExceeded();

    /// @notice Error that is thrown if the owner tries to renounce ownership
    error CannotRenounceOwnership();

    ////////////////////////////////////////////////////////////////
    //                           EVENTS                           //
    ////////////////////////////////////////////////////////////////

    /// @notice Event emitted when a caller is added
    event CallerAdded(address indexed caller);

    /// @notice Event emitted when a caller is removed
    event CallerRemoved(address indexed caller);

    /// @notice Event emitted when the AllowanceModule is set
    event AllowanceModuleSet(address indexed allowanceModule);

    /// @notice Event emitted when the WLD token is set
    event WldTokenSet(address indexed wldToken);

    /// @notice Event emitted when the Holder is set
    event HolderSet(address indexed holder);

    /// @notice Event emitted when the RecurringGrantDrop is set
    event RecurringGrantDropSet(address indexed recurringGrantDrop);

    /// @notice Event emitted when the max claim amount is set
    event MaxClaimAmountSet(uint256 maxClaimAmount);

    /// @notice Event emitted when a first claim has been made
    event FirstClaimClaimed(
        uint256 grantId, address indexed receiver, uint256 amount, uint256 currentGrantAmount
    );

    ////////////////////////////////////////////////////////////////
    ///                      CONFIG STORAGE                      ///
    ////////////////////////////////////////////////////////////////

    /// @notice address of the Safe Allowance Module
    AllowanceModule public allowanceModule;

    /// @notice Worldcoin token address
    address public token;

    /// @notice address that grants allowances to this contract
    address public holder;

    /// @notice Recurring Grant Drop contract
    IRecurringGrantDrop public recurringGrantDrop;

    /// @notice addresses that can call the claim function
    mapping(address => bool) public allowedCallers;

    /// @notice maximum claim amount safeguard
    uint256 public maxClaimAmount;

    ////////////////////////////////////////////////////////////////
    ///                       CONSTRUCTOR                        ///
    ////////////////////////////////////////////////////////////////

    constructor(
        address _allowanceModuleAddress,
        address _wldToken,
        address _holder,
        address _recurringGrantDrop,
        uint256 _maxClaimAmount
    ) Ownable(msg.sender) {
        if (
            _allowanceModuleAddress == address(0) || _wldToken == address(0)
                || _holder == address(0) || _recurringGrantDrop == address(0)
        ) {
            revert ZeroAddress();
        }
        allowanceModule = AllowanceModule(_allowanceModuleAddress);
        token = _wldToken;
        holder = _holder;
        recurringGrantDrop = IRecurringGrantDrop(_recurringGrantDrop);
        maxClaimAmount = _maxClaimAmount;
    }

    ////////////////////////////////////////////////////////////////
    ///                        MODIFIERS                         ///
    ////////////////////////////////////////////////////////////////

    /// @notice Modifier that checks if the caller is allowed to call the function
    modifier onlyAllowedCaller() {
        if (!allowedCallers[msg.sender]) {
            revert OnlyAllowedCaller();
        }
        _;
    }

    ////////////////////////////////////////////////////////////////
    ///                        FUNCTIONS                         ///
    ////////////////////////////////////////////////////////////////

    /// @notice Claim the first grant
    /// @param grantId The grant ID to claim
    /// @param receiver The address that will receive the tokens (this is also the signal of the ZKP)
    /// @param root The root of the Merkle tree
    /// @param nullifierHash The nullifier for this proof, preventing double signaling
    /// @param proof The zero knowledge proof that demonstrates the claimer has a verified World ID
    /// @param amount The total amount to claim
    function claim(
        uint256 grantId,
        address receiver,
        uint256 root,
        uint256 nullifierHash,
        uint256[8] calldata proof,
        uint256 amount
    ) external onlyAllowedCaller {
        if (amount > maxClaimAmount) {
            revert MaxClaimAmountExceeded();
        }

        uint256 currentGrantAmount = recurringGrantDrop.grant().getAmount(grantId);
        if (currentGrantAmount >= amount) {
            revert GrantAmountTooLarge();
        }

        recurringGrantDrop.claim(grantId, receiver, root, nullifierHash, proof);
        allowanceModule.executeAllowanceTransfer(
            holder, token, payable(receiver), uint96(amount - currentGrantAmount)
        );

        emit FirstClaimClaimed(grantId, receiver, amount, currentGrantAmount);
    }

    ////////////////////////////////////////////////////////////////
    ///                    CONFIG FUNCTIONS                     ///
    ////////////////////////////////////////////////////////////////

    function setAllowanceModule(address _allowanceModuleAddress) external onlyOwner {
        if (_allowanceModuleAddress == address(0)) {
            revert ZeroAddress();
        }
        allowanceModule = AllowanceModule(_allowanceModuleAddress);
        emit AllowanceModuleSet(_allowanceModuleAddress);
    }

    function setWldToken(address _wldToken) external onlyOwner {
        if (_wldToken == address(0)) {
            revert ZeroAddress();
        }
        token = _wldToken;
        emit WldTokenSet(_wldToken);
    }

    function setHolder(address _holder) external onlyOwner {
        if (_holder == address(0)) {
            revert ZeroAddress();
        }
        holder = _holder;
        emit HolderSet(_holder);
    }

    function setRecurringGrantDrop(IRecurringGrantDrop _recurringGrantDrop) external onlyOwner {
        if (address(_recurringGrantDrop) == address(0)) {
            revert ZeroAddress();
        }
        recurringGrantDrop = _recurringGrantDrop;
        emit RecurringGrantDropSet(address(_recurringGrantDrop));
    }

    function addCaller(address _caller) external onlyOwner {
        if (_caller == address(0)) {
            revert ZeroAddress();
        }
        allowedCallers[_caller] = true;
        emit CallerAdded(_caller);
    }

    function removeCaller(address _caller) external onlyOwner {
        if (_caller == address(0)) {
            revert ZeroAddress();
        }
        delete allowedCallers[_caller];
        emit CallerRemoved(_caller);
    }

    function setMaxClaimAmount(uint256 _maxClaimAmount) external onlyOwner {
        maxClaimAmount = _maxClaimAmount;
        emit MaxClaimAmountSet(_maxClaimAmount);
    }

    /// @notice Prevents the owner from renouncing ownership
    /// @dev onlyOwner
    function renounceOwnership() public view override onlyOwner {
        revert CannotRenounceOwnership();
    }
}

// an interface for the RecurringGrantDrop of this commit https://github.com/worldcoin/worldcoin-grants-contracts/commit/68cf64877cb59d5e96b3894a5c79f63a4c0ffa1f
interface IRecurringGrantDrop {
    function claim(
        uint256 grantId,
        address receiver,
        uint256 root,
        uint256 nullifierHash,
        uint256[8] calldata proof
    ) external;

    function grant() external view returns (IGrant);
}

// an interface for the AllowanceModule contract deployed at these addresses
// optimism: 0x948BDE4d8670500b0F62cF5c745C82ABe7c81A65
// worldchain: 0xa9bcF56d9FCc0178414EF27a3d893C9469e437B7
interface AllowanceModule {
    function executeAllowanceTransfer(
        address safe,
        address token,
        address payable to,
        uint96 amount
    ) external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable.sol)

pragma solidity ^0.8.19;

import {Context} from "../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.
 *
 * The initial owner is set to the address provided by the deployer. 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;

    /**
     * @dev The caller account is not authorized to perform an operation.
     */
    error OwnableUnauthorizedAccount(address account);

    /**
     * @dev The owner is not a valid owner account. (eg. `address(0)`)
     */
    error OwnableInvalidOwner(address owner);

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

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

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

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

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        if (owner() != _msgSender()) {
            revert OwnableUnauthorizedAccount(_msgSender());
        }
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling 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 {
        if (newOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _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: MIT
// OpenZeppelin Contracts (last updated v4.9.0) (access/Ownable2Step.sol)

pragma solidity ^0.8.19;

import {Ownable} from "./Ownable.sol";

/**
 * @dev Contract module which provides access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * The initial owner is specified at deployment time in the constructor for `Ownable`. This
 * can later be changed with {transferOwnership} and {acceptOwnership}.
 *
 * This module is used through inheritance. It will make available all functions
 * from parent (Ownable).
 */
abstract contract Ownable2Step is Ownable {
    address private _pendingOwner;

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

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

    /**
     * @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one.
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual override onlyOwner {
        _pendingOwner = newOwner;
        emit OwnershipTransferStarted(owner(), newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner.
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual override {
        delete _pendingOwner;
        super._transferOwnership(newOwner);
    }

    /**
     * @dev The new owner accepts the ownership transfer.
     */
    function acceptOwnership() public virtual {
        address sender = _msgSender();
        if (pendingOwner() != sender) {
            revert OwnableUnauthorizedAccount(sender);
        }
        _transferOwnership(sender);
    }
}

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

interface IGrant {
    /// @notice Error in case the grant is invalid.
    error InvalidGrant();

    /// @notice Error in case the grant configuration is invalid.
    error InvalidConfiguration();

    /// @notice Returns the amount of tokens for a grant.
    /// @notice This may contain more complicated logic and is therefore not just a member variable.
    /// @param grantId The grant id to get the amount for.
    function getAmount(uint256 grantId) external view returns (uint256);

    /// @notice Checks whether a grant is valid.
    /// @param grantId The grant id to check.
    function checkValidity(uint256 grantId) external view;
}

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

pragma solidity ^0.8.19;

/**
 * @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;
    }
}

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    "contracts-upgradeable/=lib/world-id-contracts/lib/openzeppelin-contracts-upgradeable/contracts/",
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    "forge-std/=lib/forge-std/src/",
    "halmos-cheatcodes/=lib/openzeppelin-contracts/lib/halmos-cheatcodes/src/",
    "openzeppelin-contracts-upgradeable/=lib/world-id-contracts/lib/openzeppelin-contracts-upgradeable/",
    "openzeppelin-contracts/=lib/openzeppelin-contracts/",
    "openzeppelin/=lib/openzeppelin-contracts/contracts/",
    "prb-test/=lib/prb-test/src/",
    "semaphore/=lib/semaphore/",
    "solmate/=lib/solmate/src/",
    "v3-periphery/=lib/v3-periphery/contracts/",
    "world-id-contracts/=lib/world-id-contracts/src/",
    "zk-kit/=lib/zk-kit/"
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  "optimizer": {
    "enabled": true,
    "runs": 10000,
    "details": {
      "peephole": true,
      "inliner": true,
      "deduplicate": true,
      "cse": true,
      "yul": true
    }
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "none",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
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  },
  "evmVersion": "paris",
  "viaIR": false,
  "libraries": {}
}

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IRecurringGrantDrop","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_caller","type":"address"}],"name":"removeCaller","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_allowanceModuleAddress","type":"address"}],"name":"setAllowanceModule","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_holder","type":"address"}],"name":"setHolder","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_maxClaimAmount","type":"uint256"}],"name":"setMaxClaimAmount","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract IRecurringGrantDrop","name":"_recurringGrantDrop","type":"address"}],"name":"setRecurringGrantDrop","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_wldToken","type":"address"}],"name":"setWldToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"token","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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000000000000000000000000a9bcf56d9fcc0178414ef27a3d893c9469e437b70000000000000000000000002cfc85d8e48f8eab294be644d9e25c30308630030000000000000000000000008567cda1429c4682f9516fc2f95d82566f2c70080000000000000000000000002c1ca1fbbd5f28e5492cc6bf8c4e8c57354eb162000000000000000000000000000000000000000000000002b5e3af16b1880000

-----Decoded View---------------
Arg [0] : _allowanceModuleAddress (address): 0xa9bcF56d9FCc0178414EF27a3d893C9469e437B7
Arg [1] : _wldToken (address): 0x2cFc85d8E48F8EAB294be644d9E25C3030863003
Arg [2] : _holder (address): 0x8567Cda1429c4682F9516fc2F95D82566f2C7008
Arg [3] : _recurringGrantDrop (address): 0x2c1Ca1FBbD5f28e5492Cc6bF8C4e8c57354eb162
Arg [4] : _maxClaimAmount (uint256): 50000000000000000000

-----Encoded View---------------
5 Constructor Arguments found :
Arg [0] : 000000000000000000000000a9bcf56d9fcc0178414ef27a3d893c9469e437b7
Arg [1] : 0000000000000000000000002cfc85d8e48f8eab294be644d9e25c3030863003
Arg [2] : 0000000000000000000000008567cda1429c4682f9516fc2f95d82566f2c7008
Arg [3] : 0000000000000000000000002c1ca1fbbd5f28e5492cc6bf8c4e8c57354eb162
Arg [4] : 000000000000000000000000000000000000000000000002b5e3af16b1880000