Contract 0x261bd83050579edea22d90a18fcc9dafd43d10e3 2

// 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/transmissions11/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;

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

/// @notice Safe ETH and ERC20 transfer library that gracefully handles missing return values.
/// @author Solmate (https://github.com/transmissions11/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;

        /// @solidity memory-safe-assembly
        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;

        /// @solidity memory-safe-assembly
        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;

        /// @solidity memory-safe-assembly
        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;

        /// @solidity memory-safe-assembly
        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
pragma solidity ^0.8.19;

/// @title WorldID Interface with Groups
/// @author Worldcoin
/// @notice The interface to the proof verification for WorldID.
interface IWorldIDGroups {
    /// @notice Verifies a WorldID zero knowledge proof.
    /// @dev Note that a double-signaling check is not included here, and should be carried by the
    ///      caller.
    /// @dev It is highly recommended that the implementation is restricted to `view` if possible.
    ///
    /// @param groupId The group identifier for the group to verify a proof for.
    /// @param root The of the Merkle tree
    /// @param signalHash A keccak256 hash of the Semaphore signal
    /// @param nullifierHash The nullifier hash
    /// @param externalNullifierHash A keccak256 hash of the external nullifier
    /// @param proof The zero-knowledge proof
    ///
    /// @custom:reverts string If the `proof` is invalid.
    /// @custom:reverts NoSuchGroup If the provided `groupId` references a group that does not exist.
    function verifyProof(
        uint256 groupId,
        uint256 root,
        uint256 signalHash,
        uint256 nullifierHash,
        uint256 externalNullifierHash,
        uint256[8] calldata proof
    ) external;
}

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

library ByteHasher {
    /// @dev Creates a keccak256 hash of a bytestring.
    /// @param value The bytestring to hash
    /// @return The hash of the specified value
    /// @dev `>> 8` makes sure that the result is included in our field
    function hashToField(bytes memory value) internal pure returns (uint256) {
        return uint256(keccak256(abi.encodePacked(value))) >> 8;
    }
}

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

import {ERC20} from "solmate/tokens/ERC20.sol";
import {SafeTransferLib} from "solmate/utils/SafeTransferLib.sol";
import {IWorldIDGroups} from "world-id-contracts/interfaces/IWorldIDGroups.sol";
import {ByteHasher} from "world-id-contracts/libraries/ByteHasher.sol";

/// @title World ID Multiple Airdrop Manager
/// @author Worldcoin
/// @notice Template contract for managing multiple airdrops to World ID members.
contract WorldIDMultiAirdrop {
    using ByteHasher for bytes;

    ///////////////////////////////////////////////////////////////////////////////
    ///                                  ERRORS                                ///
    //////////////////////////////////////////////////////////////////////////////

    /// @notice Thrown when trying to create or update airdrop details without being the manager
    error Unauthorized();

    /// @notice Thrown when attempting to reuse a nullifier
    error InvalidNullifier();

    /// @notice Thrown when attempting to claim a non-existent airdrop
    error InvalidAirdrop();

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

    /// @notice Emitted when an airdrop is created
    /// @param airdropId The id of the airdrop
    /// @param airdrop The airdrop details
    event AirdropCreated(uint256 airdropId, Airdrop airdrop);

    /// @notice Emitted when an airdrop is successfully claimed
    /// @param receiver The address that received the airdrop
    event AirdropClaimed(uint256 indexed airdropId, address receiver);

    /// @notice Emitted when the airdropped amount is changed
    /// @param airdropId The id of the airdrop getting updated
    /// @param airdrop The new details for the airdrop
    event AirdropUpdated(uint256 indexed airdropId, Airdrop airdrop);

    ///////////////////////////////////////////////////////////////////////////////
    ///                                 STRUCTS                                ///
    //////////////////////////////////////////////////////////////////////////////

    /// @notice Stores the details for a specific airdrop
    /// @param groupId The ID of the WorldIDRouter group that will be eligible to claim this airdrop
    /// @param token The ERC20 token that will be airdropped to eligible participants
    /// @param manager The address that manages this airdrop, which is allowed to update the airdrop details.
    /// @param holder The address holding the tokens that will be airdropped
    /// @param amount The amount of tokens that each participant will receive upon claiming
    struct Airdrop {
        uint256 groupId;
        ERC20 token;
        address manager;
        address holder;
        uint256 amount;
    }

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

    /// @dev The WorldID router instance that will be used for managing groups and verifying proofs
    IWorldIDGroups internal immutable worldIdRouter;

    address internal immutable owner = msg.sender;

    /// @dev Whether a nullifier hash has been used already. Used to prevent double-signaling
    mapping(uint256 => bool) internal nullifierHashes;

    uint256 internal nextAirdropId = 1;
    mapping(uint256 => Airdrop) public getAirdrop;

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

    /// @notice Deploys a WorldIDAirdrop instance
    /// @param _worldIdRouter The WorldID router instance that will manage groups and verify proofs
    constructor(IWorldIDGroups _worldIdRouter) {
        worldIdRouter = _worldIdRouter;
    }

    /// @notice Create a new airdrop
    /// @param groupId The ID of the WorldIDRouter group that will be eligible to claim this airdrop
    /// @param token The ERC20 token that will be airdropped to eligible participants
    /// @param holder The address holding the tokens that will be airdropped
    /// @param amount The amount of tokens that each participant will receive upon claiming
    function createAirdrop(uint256 groupId, ERC20 token, address holder, uint256 amount) public {
        require(msg.sender == owner, "Sender must be owner");

        Airdrop memory airdrop = Airdrop({
            groupId: groupId,
            token: token,
            manager: msg.sender,
            holder: holder,
            amount: amount
        });

        getAirdrop[nextAirdropId] = airdrop;
        emit AirdropCreated(nextAirdropId, airdrop);

        ++nextAirdropId;
    }

    ///////////////////////////////////////////////////////////////////////////////
    ///                               CLAIM LOGIC                               ///
    //////////////////////////////////////////////////////////////////////////////

    /// @notice Claim a given airdrop
    /// @param airdropId The id of the airdrop getting claimed
    /// @param receiver The address that will receive the tokens
    /// @param root The of the Merkle tree
    /// @param nullifierHash The nullifier for this proof, preventing double signaling
    /// @param proof The zero knowledge proof that demostrates the claimer is part of the WorldID group
    /// @dev hashToField function docs are in lib/world-id-contracts/src/libraries/ByteHasher.sol
    function claim(
        uint256 airdropId,
        address receiver,
        uint256 root,
        uint256 nullifierHash,
        uint256[8] calldata proof
    ) public {
        if (nullifierHashes[nullifierHash]) revert InvalidNullifier();

        Airdrop memory airdrop = getAirdrop[airdropId];
        if (airdropId == 0 || airdropId >= nextAirdropId) revert InvalidAirdrop();

        worldIdRouter.verifyProof(
            airdrop.groupId,
            root,
            abi.encodePacked(receiver).hashToField(),
            nullifierHash,
            abi.encodePacked(address(this), airdropId).hashToField(),
            proof
        );

        nullifierHashes[nullifierHash] = true;
        emit AirdropClaimed(airdropId, receiver);

        SafeTransferLib.safeTransferFrom(airdrop.token, airdrop.holder, receiver, airdrop.amount);
    }

    ///////////////////////////////////////////////////////////////////////////////
    ///                               CONFIG LOGIC                             ///
    //////////////////////////////////////////////////////////////////////////////

    /// @notice Update the details for a given airdrop, for addresses that haven't claimed already. Can only be called by the airdrop creator
    /// @param airdropId The id of the airdrop to update
    /// @param airdrop The new details for the airdrop
    function updateDetails(uint256 airdropId, Airdrop calldata airdrop) public {
        if (getAirdrop[airdropId].manager != msg.sender) revert Unauthorized();

        getAirdrop[airdropId] = airdrop;

        emit AirdropUpdated(airdropId, airdrop);
    }
}

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      "yul": true
    }
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  "metadata": {
    "bytecodeHash": "none",
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  },
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}

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[{"inputs":[{"internalType":"contract IWorldIDGroups","name":"_worldIdRouter","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"InvalidAirdrop","type":"error"},{"inputs":[],"name":"InvalidNullifier","type":"error"},{"inputs":[],"name":"Unauthorized","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"airdropId","type":"uint256"},{"indexed":false,"internalType":"address","name":"receiver","type":"address"}],"name":"AirdropClaimed","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"airdropId","type":"uint256"},{"components":[{"internalType":"uint256","name":"groupId","type":"uint256"},{"internalType":"contract ERC20","name":"token","type":"address"},{"internalType":"address","name":"manager","type":"address"},{"internalType":"address","name":"holder","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"indexed":false,"internalType":"struct WorldIDMultiAirdrop.Airdrop","name":"airdrop","type":"tuple"}],"name":"AirdropCreated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"airdropId","type":"uint256"},{"components":[{"internalType":"uint256","name":"groupId","type":"uint256"},{"internalType":"contract ERC20","name":"token","type":"address"},{"internalType":"address","name":"manager","type":"address"},{"internalType":"address","name":"holder","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"indexed":false,"internalType":"struct WorldIDMultiAirdrop.Airdrop","name":"airdrop","type":"tuple"}],"name":"AirdropUpdated","type":"event"},{"inputs":[{"internalType":"uint256","name":"airdropId","type":"uint256"},{"internalType":"address","name":"receiver","type":"address"},{"internalType":"uint256","name":"root","type":"uint256"},{"internalType":"uint256","name":"nullifierHash","type":"uint256"},{"internalType":"uint256[8]","name":"proof","type":"uint256[8]"}],"name":"claim","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"groupId","type":"uint256"},{"internalType":"contract ERC20","name":"token","type":"address"},{"internalType":"address","name":"holder","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"createAirdrop","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"getAirdrop","outputs":[{"internalType":"uint256","name":"groupId","type":"uint256"},{"internalType":"contract ERC20","name":"token","type":"address"},{"internalType":"address","name":"manager","type":"address"},{"internalType":"address","name":"holder","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"airdropId","type":"uint256"},{"components":[{"internalType":"uint256","name":"groupId","type":"uint256"},{"internalType":"contract ERC20","name":"token","type":"address"},{"internalType":"address","name":"manager","type":"address"},{"internalType":"address","name":"holder","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"internalType":"struct WorldIDMultiAirdrop.Airdrop","name":"airdrop","type":"tuple"}],"name":"updateDetails","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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000000000000000000000000f7134ce138832c1456f2a91d64621ee90c2bddea

-----Decoded View---------------
Arg [0] : _worldIdRouter (address): 0xf7134ce138832c1456f2a91d64621ee90c2bddea

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 000000000000000000000000f7134ce138832c1456f2a91d64621ee90c2bddea