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

import "@openzeppelin/contracts/utils/cryptography/MerkleProof.sol";
import "./ElfNFT.sol";

contract Minter is Authorizable {
    // The ERC721 contract to mint
    ElfNFT public immutable elfNFT;

    // The merkle root with deposits encoded into it as hash [address, tokenId]
    // Assumed to be a node sorted tree
    bytes32 public merkleRoot;

    constructor(address _token, bytes32 _merkleRoot) {
        elfNFT = ElfNFT(_token);
        merkleRoot = _merkleRoot;
    }

    /// @notice mints an NFT for an approved account in the merkle tree
    /// @param tokenId the unique id for the token
    /// @param merkleProof the merkle proof associated with the sender's address
    /// and tokenId that validates minting
    function mint(uint256 tokenId, bytes32[] memory merkleProof) public {
        // Hash the user plus the token id
        bytes32 leafHash = keccak256(abi.encodePacked(msg.sender, tokenId));

        // Verify the proof for this leaf
        require(
            MerkleProof.verify(merkleProof, merkleRoot, leafHash),
            "Invalid Proof"
        );

        // mint the token, assuming it hasn't already been minted
        elfNFT.mint(msg.sender, tokenId);
    }

    function setRewardsRoot(bytes32 _merkleRoot) public onlyOwner {
        merkleRoot = _merkleRoot;
    }

    // because we may change conditions for minting down the road, allow
    // transferring ownership of the NFT contract to a new minter.
    function transferNFTOwnership(address newOwner) public onlyOwner {
        elfNFT.setOwner(newOwner);
    }
}

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

pragma solidity ^0.8.0;

/**
 * @dev These functions deal with verification of Merkle Trees proofs.
 *
 * The proofs can be generated using the JavaScript library
 * https://github.com/miguelmota/merkletreejs[merkletreejs].
 * Note: the hashing algorithm should be keccak256 and pair sorting should be enabled.
 *
 * See `test/utils/cryptography/MerkleProof.test.js` for some examples.
 */
library MerkleProof {
    /**
     * @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree
     * defined by `root`. For this, a `proof` must be provided, containing
     * sibling hashes on the branch from the leaf to the root of the tree. Each
     * pair of leaves and each pair of pre-images are assumed to be sorted.
     */
    function verify(
        bytes32[] memory proof,
        bytes32 root,
        bytes32 leaf
    ) internal pure returns (bool) {
        return processProof(proof, leaf) == root;
    }

    /**
     * @dev Returns the rebuilt hash obtained by traversing a Merklee tree up
     * from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt
     * hash matches the root of the tree. When processing the proof, the pairs
     * of leafs & pre-images are assumed to be sorted.
     *
     * _Available since v4.4._
     */
    function processProof(bytes32[] memory proof, bytes32 leaf) internal pure returns (bytes32) {
        bytes32 computedHash = leaf;
        for (uint256 i = 0; i < proof.length; i++) {
            bytes32 proofElement = proof[i];
            if (computedHash <= proofElement) {
                // Hash(current computed hash + current element of the proof)
                computedHash = keccak256(abi.encodePacked(computedHash, proofElement));
            } else {
                // Hash(current element of the proof + current computed hash)
                computedHash = keccak256(abi.encodePacked(proofElement, computedHash));
            }
        }
        return computedHash;
    }
}

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

import "@rari-capital/solmate/src/tokens/ERC721.sol";
import "@openzeppelin/contracts/utils/Strings.sol";
import "./Authorizable.sol";

contract ElfNFT is ERC721, Authorizable {
    using Strings for uint256;

    string public baseURI;

    uint256 public count;

    /// @notice constructor
    /// @param _name the name of the NFT
    /// @param _symbol the symbol of the NFT
    constructor(
        string memory _name,
        string memory _symbol,
        address _owner,
        string memory _baseURI
    ) ERC721(_name, _symbol) {
        setOwner(_owner);
        // don't use setBaseURI since deployer isn't authorized yet
        baseURI = _baseURI;
    }

    /// @notice retrieves the tokenURI, which will be a concatenation of the
    /// 'baseURI' and the 'tokenId'
    /// @param tokenId an identifier for the token
    function tokenURI(uint256 tokenId)
        public
        view
        override
        returns (string memory)
    {
        return
            bytes(baseURI).length > 0
                ? string(abi.encodePacked(baseURI, "/", tokenId.toString()))
                : "";
    }

    function setBaseURI(string memory _baseURI) public onlyAuthorized {
        baseURI = _baseURI;
    }

    function mint(address to, uint256 tokenId) public onlyOwner {
        _mint(to, tokenId);
        count++;
    }
}

// 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)
/// @dev Note that balanceOf does not revert if passed the zero address, in defiance of the ERC.
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 STORAGE                        
    //////////////////////////////////////////////////////////////*/

    mapping(address => uint256) public balanceOf;

    mapping(uint256 => address) public ownerOf;

    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 || msg.sender == getApproved[id] || isApprovedForAll[from][msg.sender],
            "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 memory 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 pure 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(ownerOf[id] != 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)
interface ERC721TokenReceiver {
    function onERC721Received(
        address operator,
        address from,
        uint256 id,
        bytes calldata data
    ) external returns (bytes4);
}

// 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);
    }
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity >=0.8.0;

contract Authorizable {
    // This contract allows a flexible authorization scheme

    // The owner who can change authorization status
    address public owner;
    // A mapping from an address to its authorization status
    mapping(address => bool) public authorized;

    /// @dev We set the deployer to the owner
    constructor() {
        owner = msg.sender;
    }

    /// @dev This modifier checks if the msg.sender is the owner
    modifier onlyOwner() {
        require(msg.sender == owner, "Sender not owner");
        _;
    }

    /// @dev This modifier checks if an address is authorized
    modifier onlyAuthorized() {
        require(isAuthorized(msg.sender), "Sender not Authorized");
        _;
    }

    /// @dev Returns true if an address is authorized
    /// @param who the address to check
    /// @return true if authorized false if not
    function isAuthorized(address who) public view returns (bool) {
        return authorized[who];
    }

    /// @dev Privileged function authorize an address
    /// @param who the address to authorize
    function authorize(address who) external onlyOwner {
        _authorize(who);
    }

    /// @dev Privileged function to de authorize an address
    /// @param who The address to remove authorization from
    function deauthorize(address who) external onlyOwner {
        authorized[who] = false;
    }

    /// @dev Function to change owner
    /// @param who The new owner address
    function setOwner(address who) public onlyOwner {
        owner = who;
    }

    /// @dev Inheritable function which authorizes someone
    /// @param who the address to authorize
    function _authorize(address who) internal {
        authorized[who] = true;
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 7500
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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000000000000000000000000db042927c36791bd500698c7d1bd81b6864229b5dcb25b2f04e6cde986427dfd8cda532dd75c0cd5db62bf8046edd05f62229e04

-----Decoded View---------------
Arg [0] : _token (address): 0xDb042927c36791Bd500698c7d1bD81b6864229b5
Arg [1] : _merkleRoot (bytes32): 0xdcb25b2f04e6cde986427dfd8cda532dd75c0cd5db62bf8046edd05f62229e04

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 000000000000000000000000db042927c36791bd500698c7d1bd81b6864229b5
Arg [1] : dcb25b2f04e6cde986427dfd8cda532dd75c0cd5db62bf8046edd05f62229e04