Contract 0x1fC985cAc641ED5846b631f96F35d9b48Bc3b834 4

 
 
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0xfadd5546dd4c1eb639f8dd9a6a786dd7320cd0f7d054f3c75bf456f9b1c3eb03Claim159655192022-11-14 3:14:3518 days 18 hrs ago0xf56d611b310110f611a9be1b647dd5ba395c7a07 IN  Unstoppable Domains: FreeMinter0 Ether0.0025904 13.55142237
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0x5e8036662f57fd6329f3e693cd20afa67c7258048987822f12864cb11b5377e8Claim158290862022-10-26 1:53:3537 days 20 hrs ago0x222419ad67b75a3079a781e35b7945b9a38f4080 IN  Unstoppable Domains: FreeMinter0 Ether0.00177315 13.72573568
0x98498393ec20e4144dd35204044c4ef526a0804c2d2f94377611293ac2fcc2eeClaim158290522022-10-26 1:46:3537 days 20 hrs ago0x222419ad67b75a3079a781e35b7945b9a38f4080 IN  Unstoppable Domains: FreeMinter0 Ether0.0015809 10.80703408
0x3085d85fe1f1c3b977be98f9ceff696f846cc22c270b9dcacce04c0e875d4e14Claim156380732022-09-29 9:21:1164 days 12 hrs ago0x4f7d352615aa665083b728c1718263326444bcdd IN  Unstoppable Domains: FreeMinter0 Ether0.00147167 7.69888325
0x7caa8e2dcd3e9cc6f1c32f790d1a64da2e0f865c73ecff1b95f56f94d3a92dd4Claim154806892022-09-05 23:31:4987 days 22 hrs agoENS Name pinfed-rosner.eth IN  Unstoppable Domains: FreeMinter0 Ether0.001434799.8
0xd04161bb4d1818642a949f20a7e5d8305d8ef652bdd993dab1cd343935fb16deClaim154034742022-08-24 14:36:22100 days 7 hrs ago0xa007804bbe3c55b6b23b1dcbae954d6ca5022e02 IN  Unstoppable Domains: FreeMinter0 Ether0.00163975 11.20726301
0x3007219bab271e23c157a576b339526d4f941bfff3020c88528384209cc9df13Claim153661602022-08-18 16:55:14106 days 5 hrs ago0xe8bcf3c1de4be75ea61c6c16fd321f5368327284 IN  Unstoppable Domains: FreeMinter0 Ether0.00452194 30.88841898
0xc8a2e0f7960622fc6c10f4f2f2f42c5c186ed305327ef1a7d3c2c25c1022280cClaim151919312022-07-22 10:54:32133 days 11 hrs ago0x66b1decb2d3c72692ad7587c703b676cc7f5c825 IN  Unstoppable Domains: FreeMinter0 Ether0.00156756 10.71295057
0x07f481589ec150cd4fac0af6cf6e18f6c653315df7c8e6b9a6e7cfb22b9afb84Claim149726332022-06-16 9:46:35169 days 12 hrs agoENS Name sinu5oid.eth IN  Unstoppable Domains: FreeMinter0 Ether0.00603687 41.250114
0x72440c4496b0eba4b843fd5647a95fa5df51df64c0b622c58a16889a7993ada8Claim144449782022-03-23 21:24:18254 days 48 mins ago0xa8bb51351b10c1a5bd8385cb5cc982e5a9d810a5 IN  Unstoppable Domains: FreeMinter0 Ether0.00799559 54.61175406
0xe9bfd1f10133154deab8dbf735fcf242b1938ed8901ae856011d002ad894eddeClaim141778162022-02-10 10:28:46295 days 11 hrs ago0x725b239fc80194ffe10af8a584bccf234bf340fa IN  Unstoppable Domains: FreeMinter0 Ether0.00509449 34.80799498
0xf99cc17a71955dd765856a6d55cf1f3532afedb917f7644ea9aeacbca8d7772eClaim136386792021-11-18 10:06:05379 days 12 hrs ago0x5bac8c443ebd0525364dc813005ab72956d3705d IN  Unstoppable Domains: FreeMinter0 Ether0.0237542 123.89855115
0xd0e5ad91d4983bb20d96618af9f481658f141d63e166592f557a458eabddf4abClaim134759022021-10-23 20:13:14405 days 1 hr ago0xd01e5d29c55c4450b8d6fe9f029ef9967a012ea9 IN  Unstoppable Domains: FreeMinter0 Ether0.01200996 71.26812391
0xbf77ac8e3423f26617faf7188fd9bbef94f357bfc08cc55edca5b0d59c070a5bClaim129814972021-08-08 1:39:23481 days 20 hrs ago0x0ba2c94723ff00b80bc2981b3029e341226a7ef8 IN  Unstoppable Domains: FreeMinter0 Ether0.0086254358.94749661
0x1991cf79904242b54edbceb4342940e8200feaedabdb3be4610085146f1c7414Claim129216232021-07-29 15:57:21491 days 6 hrs ago0x3c18a595db05628ea5b933bcc9501e94fcd2ce52 IN  Unstoppable Domains: FreeMinter0 Ether0.0043458229.7
0x003287df423cfdecf8e73d6fbda938ac6dc0fb9808455ebf22483240cf4b48acClaim129193742021-07-29 7:25:27491 days 14 hrs ago0x1ff390f7a0d97d2b99d6fe0a6d1635d5812738c4 IN  Unstoppable Domains: FreeMinter0 Ether0.0032191222
0xb0a5304ec62b1092482c9c2e47ea5a8fbeb7793a85190fcb3b0b659ffa7f0f92Claim128688482021-07-21 8:59:35499 days 13 hrs ago0xe06d7f3739ab8fb31120801ccdb933536bd5c813 IN  Unstoppable Domains: FreeMinter0 Ether0.0016799113
0x8a43108f6ea85547b510f1078f349724fb4e54da7b28dbc9f827ebca59325313Claim128686322021-07-21 8:08:52499 days 14 hrs ago0xe06d7f3739ab8fb31120801ccdb933536bd5c813 IN  Unstoppable Domains: FreeMinter0 Ether0.0021031316.2751
0x31494c7eaf429709b76eaf25901d8b6706a71c07a1faffa6967ddcaea004e2adClaim128520432021-07-18 17:50:33502 days 4 hrs ago0xfc47f05283647b89cbe190d2dba7bd85c769022b IN  Unstoppable Domains: FreeMinter0 Ether0.0036385420.9
0x8dea39258bedeee30f2687d4fd006575d5d7fe3264cfdca64f2ac7183b209fbdClaim127981732021-07-10 6:56:03510 days 15 hrs ago0x43b5d4bff0303eb07727391021dbeca276c7ef86 IN  Unstoppable Domains: FreeMinter0 Ether0.0014222511
0xd0ef6be71c8a432bbb49f0b84319c7fd6a37a47873d71d924bb4940cd723c2dcClaim127951932021-07-09 20:01:21511 days 2 hrs agoENS Name danyelo.eth IN  Unstoppable Domains: FreeMinter0 Ether0.0024147416.5
0xd7fcfc763ea59028a261c94f7118c380c57bfbbbeec235edd55e4a3688ca1f18Claim127897562021-07-08 23:36:34511 days 22 hrs ago0x5875e9545d446cd02103d7b0f20900ffb5ca63a5 IN  Unstoppable Domains: FreeMinter0 Ether0.0028442422
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Contract Source Code Verified (Exact Match)

Contract Name:
FreeMinter

Compiler Version
v0.5.12+commit.7709ece9

Optimization Enabled:
No with 200 runs

Other Settings:
default evmVersion, None license

Contract Source Code (Solidity)

/**
 *Submitted for verification at Etherscan.io on 2020-11-24
*/

pragma solidity 0.5.12;
pragma experimental ABIEncoderV2;


contract IResolver {
    /**
     * @dev Reset all domain records and set new ones
     * @param keys New record keys
     * @param values New record values
     * @param tokenId ERC-721 token id of the domain
     */
    function reconfigure(string[] memory keys, string[] memory values, uint256 tokenId) public;

    /**
    * @dev Set all domain records for newly minted domain
    * @param keys New record keys
    * @param values New record values
    * @param tokenId ERC-721 token id of the domain
    */
    function preconfigure(string[] memory keys, string[] memory values, uint256 tokenId) public;

    /**
     * @dev Set or update domain records
     * @param keys New record keys
     * @param values New record values
     * @param tokenId ERC-721 token id of the domain
     */
    function setMany(string[] memory keys, string[] memory values, uint256 tokenId) public;

    /**
     * @dev Function to set record.
     * @param key The key set the value of.
     * @param value The value to set key to.
     * @param tokenId ERC-721 token id to set.
     */
    function set(string calldata key, string calldata value, uint256 tokenId) external;

    /**
     * @dev Function to reset all existing records on a domain.
     * @param tokenId ERC-721 token id to set.
     */
    function reset(uint256 tokenId) external;
}

interface IRegistryReader {
    function name() external view returns (string memory);
    function symbol() external view returns (string memory);
    function tokenURI(uint256 tokenId) external view returns (string memory);

    /**
     * @dev Returns whether the given spender can transfer a given token ID. Registry related function.
     * @param spender address of the spender to query
     * @param tokenId uint256 ID of the token to be transferred
     * @return bool whether the msg.sender is approved for the given token ID,
     * is an operator of the owner, or is the owner of the token
     */
    function isApprovedOrOwner(address spender, uint256 tokenId) external view returns (bool);

    /**
     * @dev Gets the resolver of the specified token ID. Registry related function.
     * @param tokenId uint256 ID of the token to query the resolver of
     * @return address currently marked as the resolver of the given token ID
     */
    function resolverOf(uint256 tokenId) external view returns (address);

    /**
     * @dev Provides child token (subdomain) of provided tokenId. Registry related function.
     * @param tokenId uint256 ID of the token
     * @param label label of subdomain (for `aaa.bbb.crypto` it will be `aaa`)
     */
    function childIdOf(uint256 tokenId, string calldata label) external view returns (uint256);

    /**
     * @dev Controller related function.
     * @return bool whether the account is a controller
     */
    function isController(address account) external view returns (bool);

    /**
     * @dev Returns the number of NFTs in `owner`'s account. ERC721 related function.
     */
    function balanceOf(address owner) external view returns (uint256);

    /**
     * @dev Returns the owner of the NFT specified by `tokenId`. ERC721 related function.
     */
    function ownerOf(uint256 tokenId) external view returns (address);
    
    /**
     * @dev ERC721 related function.
     */
    function getApproved(uint256 tokenId) external view returns (address);
    
    /**
     * @dev ERC721 related function.
     */
    function isApprovedForAll(address owner, address operator) external view returns (bool);

    /**
     * @dev Registry related function.
     * @return root hash.
     */
    function root() external view returns (uint256);
}

/**
 * @title Roles
 * @dev Library for managing addresses assigned to a Role.
 */
library Roles {
    struct Role {
        mapping (address => bool) bearer;
    }

    /**
     * @dev Give an account access to this role.
     */
    function add(Role storage role, address account) internal {
        require(!has(role, account), "Roles: account already has role");
        role.bearer[account] = true;
    }

    /**
     * @dev Remove an account's access to this role.
     */
    function remove(Role storage role, address account) internal {
        require(has(role, account), "Roles: account does not have role");
        role.bearer[account] = false;
    }

    /**
     * @dev Check if an account has this role.
     * @return bool
     */
    function has(Role storage role, address account) internal view returns (bool) {
        require(account != address(0), "Roles: account is the zero address");
        return role.bearer[account];
    }
}

contract MinterRole {
    using Roles for Roles.Role;

    event MinterAdded(address indexed account);
    event MinterRemoved(address indexed account);

    Roles.Role private _minters;

    constructor () internal {
        _addMinter(msg.sender);
    }

    modifier onlyMinter() {
        require(isMinter(msg.sender), "MinterRole: caller does not have the Minter role");
        _;
    }

    function isMinter(address account) public view returns (bool) {
        return _minters.has(account);
    }

    function addMinter(address account) public onlyMinter {
        _addMinter(account);
    }

    function renounceMinter() public {
        _removeMinter(msg.sender);
    }

    function _addMinter(address account) internal {
        _minters.add(account);
        emit MinterAdded(account);
    }

    function _removeMinter(address account) internal {
        _minters.remove(account);
        emit MinterRemoved(account);
    }
}

interface IMintingController {

    /**
     * @dev Minter function that mints a Second Level Domain (SLD).
     * @param to address to mint the new SLD to.
     * @param label SLD label to mint.
     */
    function mintSLD(address to, string calldata label) external;

    /**
     * @dev Minter function that safely mints a Second Level Domain (SLD).
     * Implements a ERC721Reciever check unlike mintSLD.
     * @param to address to mint the new SLD to.
     * @param label SLD label to mint.
     */
    function safeMintSLD(address to, string calldata label) external;

    /**
     * @dev Minter function that safely mints a Second Level Domain (SLD).
     * Implements a ERC721Reciever check unlike mintSLD.
     * @param to address to mint the new SLD to.
     * @param label SLD label to mint.
     * @param _data bytes data to send along with a safe transfer check
     */
    function safeMintSLD(address to, string calldata label, bytes calldata _data) external;

}

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * [EIP](https://eips.ethereum.org/EIPS/eip-165).
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others (`ERC165Checker`).
 *
 * For an implementation, see `ERC165`.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * [EIP section](https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified)
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

/**
 * @dev Required interface of an ERC721 compliant contract.
 */
contract IERC721 is IERC165 {
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    /**
     * @dev Returns the number of NFTs in `owner`'s account.
     */
    function balanceOf(address owner) public view returns (uint256 balance);

    /**
     * @dev Returns the owner of the NFT specified by `tokenId`.
     */
    function ownerOf(uint256 tokenId) public view returns (address owner);

    /**
     * @dev Transfers a specific NFT (`tokenId`) from one account (`from`) to
     * another (`to`).
     *
     * 
     *
     * Requirements:
     * - `from`, `to` cannot be zero.
     * - `tokenId` must be owned by `from`.
     * - If the caller is not `from`, it must be have been allowed to move this
     * NFT by either `approve` or `setApproveForAll`.
     */
    function safeTransferFrom(address from, address to, uint256 tokenId) public;
    /**
     * @dev Transfers a specific NFT (`tokenId`) from one account (`from`) to
     * another (`to`).
     *
     * Requirements:
     * - If the caller is not `from`, it must be approved to move this NFT by
     * either `approve` or `setApproveForAll`.
     */
    function transferFrom(address from, address to, uint256 tokenId) public;
    function approve(address to, uint256 tokenId) public;
    function getApproved(uint256 tokenId) public view returns (address operator);

    function setApprovalForAll(address operator, bool _approved) public;
    function isApprovedForAll(address owner, address operator) public view returns (bool);


    function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory data) public;
}

/**
 * @title ERC-721 Non-Fungible Token Standard, optional metadata extension
 * @dev See https://eips.ethereum.org/EIPS/eip-721
 */
contract IERC721Metadata is IERC721 {
    function name() external view returns (string memory);
    function symbol() external view returns (string memory);
    function tokenURI(uint256 tokenId) external view returns (string memory);
}

contract IRegistry is IERC721Metadata {

    event NewURI(uint256 indexed tokenId, string uri);

    event NewURIPrefix(string prefix);

    event Resolve(uint256 indexed tokenId, address indexed to);

    event Sync(address indexed resolver, uint256 indexed updateId, uint256 indexed tokenId);

    /**
     * @dev Controlled function to set the token URI Prefix for all tokens.
     * @param prefix string URI to assign
     */
    function controlledSetTokenURIPrefix(string calldata prefix) external;

    /**
     * @dev Returns whether the given spender can transfer a given token ID.
     * @param spender address of the spender to query
     * @param tokenId uint256 ID of the token to be transferred
     * @return bool whether the msg.sender is approved for the given token ID,
     * is an operator of the owner, or is the owner of the token
     */
    function isApprovedOrOwner(address spender, uint256 tokenId) external view returns (bool);

    /**
     * @dev Mints a new a child token.
     * Calculates child token ID using a namehash function.
     * Requires the msg.sender to be the owner, approved, or operator of tokenId.
     * Requires the token not exist.
     * @param to address to receive the ownership of the given token ID
     * @param tokenId uint256 ID of the parent token
     * @param label subdomain label of the child token ID
     */
    function mintChild(address to, uint256 tokenId, string calldata label) external;

    /**
     * @dev Controlled function to mint a given token ID.
     * Requires the msg.sender to be controller.
     * Requires the token ID to not exist.
     * @param to address the given token ID will be minted to
     * @param label string that is a subdomain
     * @param tokenId uint256 ID of the parent token
     */
    function controlledMintChild(address to, uint256 tokenId, string calldata label) external;

    /**
     * @dev Transfers the ownership of a child token ID to another address.
     * Calculates child token ID using a namehash function.
     * Requires the msg.sender to be the owner, approved, or operator of tokenId.
     * Requires the token already exist.
     * @param from current owner of the token
     * @param to address to receive the ownership of the given token ID
     * @param tokenId uint256 ID of the token to be transferred
     * @param label subdomain label of the child token ID
     */
    function transferFromChild(address from, address to, uint256 tokenId, string calldata label) external;

    /**
     * @dev Controlled function to transfers the ownership of a token ID to
     * another address.
     * Requires the msg.sender to be controller.
     * Requires the token already exist.
     * @param from current owner of the token
     * @param to address to receive the ownership of the given token ID
     * @param tokenId uint256 ID of the token to be transferred
     */
    function controlledTransferFrom(address from, address to, uint256 tokenId) external;

    /**
     * @dev Safely transfers the ownership of a child token ID to another address.
     * Calculates child token ID using a namehash function.
     * Implements a ERC721Reciever check unlike transferFromChild.
     * Requires the msg.sender to be the owner, approved, or operator of tokenId.
     * Requires the token already exist.
     * @param from current owner of the token
     * @param to address to receive the ownership of the given token ID
     * @param tokenId uint256 parent ID of the token to be transferred
     * @param label subdomain label of the child token ID
     * @param _data bytes data to send along with a safe transfer check
     */
    function safeTransferFromChild(address from, address to, uint256 tokenId, string calldata label, bytes calldata _data) external;

    /// Shorthand for calling the above ^^^ safeTransferFromChild function with an empty _data parameter. Similar to ERC721.safeTransferFrom.
    function safeTransferFromChild(address from, address to, uint256 tokenId, string calldata label) external;

    /**
     * @dev Controlled frunction to safely transfers the ownership of a token ID
     * to another address.
     * Implements a ERC721Reciever check unlike controlledSafeTransferFrom.
     * Requires the msg.sender to be controller.
     * Requires the token already exist.
     * @param from current owner of the token
     * @param to address to receive the ownership of the given token ID
     * @param tokenId uint256 parent ID of the token to be transferred
     * @param _data bytes data to send along with a safe transfer check
     */
    function controlledSafeTransferFrom(address from, address to, uint256 tokenId, bytes calldata _data) external;

    /**
     * @dev Burns a child token ID.
     * Calculates child token ID using a namehash function.
     * Requires the msg.sender to be the owner, approved, or operator of tokenId.
     * Requires the token already exist.
     * @param tokenId uint256 ID of the token to be transferred
     * @param label subdomain label of the child token ID
     */
    function burnChild(uint256 tokenId, string calldata label) external;

    /**
     * @dev Controlled function to burn a given token ID.
     * Requires the msg.sender to be controller.
     * Requires the token already exist.
     * @param tokenId uint256 ID of the token to be burned
     */
    function controlledBurn(uint256 tokenId) external;

    /**
     * @dev Sets the resolver of a given token ID to another address.
     * Requires the msg.sender to be the owner, approved, or operator.
     * @param to address the given token ID will resolve to
     * @param tokenId uint256 ID of the token to be transferred
     */
    function resolveTo(address to, uint256 tokenId) external;

    /**
     * @dev Gets the resolver of the specified token ID.
     * @param tokenId uint256 ID of the token to query the resolver of
     * @return address currently marked as the resolver of the given token ID
     */
    function resolverOf(uint256 tokenId) external view returns (address);

    /**
     * @dev Controlled function to sets the resolver of a given token ID.
     * Requires the msg.sender to be controller.
     * @param to address the given token ID will resolve to
     * @param tokenId uint256 ID of the token to be transferred
     */
    function controlledResolveTo(address to, uint256 tokenId) external;

    /**
     * @dev Provides child token (subdomain) of provided tokenId.
     * @param tokenId uint256 ID of the token
     * @param label label of subdomain (for `aaa.bbb.crypto` it will be `aaa`)
     */
    function childIdOf(uint256 tokenId, string calldata label) external pure returns (uint256);

    /**
     * @dev Transfer domain ownership without resetting domain records.
     * @param to address of new domain owner
     * @param tokenId uint256 ID of the token to be transferred
     */
    function setOwner(address to, uint256 tokenId) external;
}

/**
 * @title ERC721 token receiver interface
 * @dev Interface for any contract that wants to support safeTransfers
 * from ERC721 asset contracts.
 */
contract IERC721Receiver {
    /**
     * @notice Handle the receipt of an NFT
     * @dev The ERC721 smart contract calls this function on the recipient
     * after a `safeTransfer`. This function MUST return the function selector,
     * otherwise the caller will revert the transaction. The selector to be
     * returned can be obtained as `this.onERC721Received.selector`. This
     * function MAY throw to revert and reject the transfer.
     * Note: the ERC721 contract address is always the message sender.
     * @param operator The address which called `safeTransferFrom` function
     * @param from The address which previously owned the token
     * @param tokenId The NFT identifier which is being transferred
     * @param data Additional data with no specified format
     * @return bytes4 `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`
     */
    function onERC721Received(address operator, address from, uint256 tokenId, bytes memory data)
    public returns (bytes4);
}

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b <= a, "SafeMath: subtraction overflow");
        uint256 c = a - b;

        return c;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) {
            return 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        // Solidity only automatically asserts when dividing by 0
        require(b > 0, "SafeMath: division by zero");
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b != 0, "SafeMath: modulo by zero");
        return a % b;
    }
}

/**
 * @dev Collection of functions related to the address type,
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * This test is non-exhaustive, and there may be false-negatives: during the
     * execution of a contract's constructor, its address will be reported as
     * not containing a contract.
     *
     * > It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies in extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        // solhint-disable-next-line no-inline-assembly
        assembly { size := extcodesize(account) }
        return size > 0;
    }
}

/**
 * @title Counters
 * @author Matt Condon (@shrugs)
 * @dev Provides counters that can only be incremented or decremented by one. This can be used e.g. to track the number
 * of elements in a mapping, issuing ERC721 ids, or counting request ids.
 *
 * Include with `using Counters for Counters.Counter;`
 * Since it is not possible to overflow a 256 bit integer with increments of one, `increment` can skip the SafeMath
 * overflow check, thereby saving gas. This does assume however correct usage, in that the underlying `_value` is never
 * directly accessed.
 */
library Counters {
    using SafeMath for uint256;

    struct Counter {
        // This variable should never be directly accessed by users of the library: interactions must be restricted to
        // the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add
        // this feature: see https://github.com/ethereum/solidity/issues/4637
        uint256 _value; // default: 0
    }

    function current(Counter storage counter) internal view returns (uint256) {
        return counter._value;
    }

    function increment(Counter storage counter) internal {
        counter._value += 1;
    }

    function decrement(Counter storage counter) internal {
        counter._value = counter._value.sub(1);
    }
}

/**
 * @dev Implementation of the `IERC165` interface.
 *
 * Contracts may inherit from this and call `_registerInterface` to declare
 * their support of an interface.
 */
contract ERC165 is IERC165 {
    /*
     * bytes4(keccak256('supportsInterface(bytes4)')) == 0x01ffc9a7
     */
    bytes4 private constant _INTERFACE_ID_ERC165 = 0x01ffc9a7;

    /**
     * @dev Mapping of interface ids to whether or not it's supported.
     */
    mapping(bytes4 => bool) private _supportedInterfaces;

    constructor () internal {
        // Derived contracts need only register support for their own interfaces,
        // we register support for ERC165 itself here
        _registerInterface(_INTERFACE_ID_ERC165);
    }

    /**
     * @dev See `IERC165.supportsInterface`.
     *
     * Time complexity O(1), guaranteed to always use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool) {
        return _supportedInterfaces[interfaceId];
    }

    /**
     * @dev Registers the contract as an implementer of the interface defined by
     * `interfaceId`. Support of the actual ERC165 interface is automatic and
     * registering its interface id is not required.
     *
     * See `IERC165.supportsInterface`.
     *
     * Requirements:
     *
     * - `interfaceId` cannot be the ERC165 invalid interface (`0xffffffff`).
     */
    function _registerInterface(bytes4 interfaceId) internal {
        require(interfaceId != 0xffffffff, "ERC165: invalid interface id");
        _supportedInterfaces[interfaceId] = true;
    }
}

/**
 * @title ERC721 Non-Fungible Token Standard basic implementation
 * @dev see https://eips.ethereum.org/EIPS/eip-721
 */
contract ERC721 is ERC165, IERC721 {
    using SafeMath for uint256;
    using Address for address;
    using Counters for Counters.Counter;

    // Equals to `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`
    // which can be also obtained as `IERC721Receiver(0).onERC721Received.selector`
    bytes4 private constant _ERC721_RECEIVED = 0x150b7a02;

    // Mapping from token ID to owner
    mapping (uint256 => address) private _tokenOwner;

    // Mapping from token ID to approved address
    mapping (uint256 => address) private _tokenApprovals;

    // Mapping from owner to number of owned token
    mapping (address => Counters.Counter) private _ownedTokensCount;

    // Mapping from owner to operator approvals
    mapping (address => mapping (address => bool)) private _operatorApprovals;

    /*
     *     bytes4(keccak256('balanceOf(address)')) == 0x70a08231
     *     bytes4(keccak256('ownerOf(uint256)')) == 0x6352211e
     *     bytes4(keccak256('approve(address,uint256)')) == 0x095ea7b3
     *     bytes4(keccak256('getApproved(uint256)')) == 0x081812fc
     *     bytes4(keccak256('setApprovalForAll(address,bool)')) == 0xa22cb465
     *     bytes4(keccak256('isApprovedForAll(address,address)')) == 0xe985e9c
     *     bytes4(keccak256('transferFrom(address,address,uint256)')) == 0x23b872dd
     *     bytes4(keccak256('safeTransferFrom(address,address,uint256)')) == 0x42842e0e
     *     bytes4(keccak256('safeTransferFrom(address,address,uint256,bytes)')) == 0xb88d4fde
     *
     *     => 0x70a08231 ^ 0x6352211e ^ 0x095ea7b3 ^ 0x081812fc ^
     *        0xa22cb465 ^ 0xe985e9c ^ 0x23b872dd ^ 0x42842e0e ^ 0xb88d4fde == 0x80ac58cd
     */
    bytes4 private constant _INTERFACE_ID_ERC721 = 0x80ac58cd;

    constructor () public {
        // register the supported interfaces to conform to ERC721 via ERC165
        _registerInterface(_INTERFACE_ID_ERC721);
    }

    /**
     * @dev Gets the balance of the specified address.
     * @param owner address to query the balance of
     * @return uint256 representing the amount owned by the passed address
     */
    function balanceOf(address owner) public view returns (uint256) {
        require(owner != address(0), "ERC721: balance query for the zero address");

        return _ownedTokensCount[owner].current();
    }

    /**
     * @dev Gets the owner of the specified token ID.
     * @param tokenId uint256 ID of the token to query the owner of
     * @return address currently marked as the owner of the given token ID
     */
    function ownerOf(uint256 tokenId) public view returns (address) {
        address owner = _tokenOwner[tokenId];
        require(owner != address(0), "ERC721: owner query for nonexistent token");

        return owner;
    }

    /**
     * @dev Approves another address to transfer the given token ID
     * The zero address indicates there is no approved address.
     * There can only be one approved address per token at a given time.
     * Can only be called by the token owner or an approved operator.
     * @param to address to be approved for the given token ID
     * @param tokenId uint256 ID of the token to be approved
     */
    function approve(address to, uint256 tokenId) public {
        address owner = ownerOf(tokenId);
        require(to != owner, "ERC721: approval to current owner");

        require(msg.sender == owner || isApprovedForAll(owner, msg.sender),
            "ERC721: approve caller is not owner nor approved for all"
        );

        _tokenApprovals[tokenId] = to;
        emit Approval(owner, to, tokenId);
    }

    /**
     * @dev Gets the approved address for a token ID, or zero if no address set
     * Reverts if the token ID does not exist.
     * @param tokenId uint256 ID of the token to query the approval of
     * @return address currently approved for the given token ID
     */
    function getApproved(uint256 tokenId) public view returns (address) {
        require(_exists(tokenId), "ERC721: approved query for nonexistent token");

        return _tokenApprovals[tokenId];
    }

    /**
     * @dev Sets or unsets the approval of a given operator
     * An operator is allowed to transfer all tokens of the sender on their behalf.
     * @param to operator address to set the approval
     * @param approved representing the status of the approval to be set
     */
    function setApprovalForAll(address to, bool approved) public {
        require(to != msg.sender, "ERC721: approve to caller");

        _operatorApprovals[msg.sender][to] = approved;
        emit ApprovalForAll(msg.sender, to, approved);
    }

    /**
     * @dev Tells whether an operator is approved by a given owner.
     * @param owner owner address which you want to query the approval of
     * @param operator operator address which you want to query the approval of
     * @return bool whether the given operator is approved by the given owner
     */
    function isApprovedForAll(address owner, address operator) public view returns (bool) {
        return _operatorApprovals[owner][operator];
    }

    /**
     * @dev Transfers the ownership of a given token ID to another address.
     * Usage of this method is discouraged, use `safeTransferFrom` whenever possible.
     * Requires the msg.sender to be the owner, approved, or operator.
     * @param from current owner of the token
     * @param to address to receive the ownership of the given token ID
     * @param tokenId uint256 ID of the token to be transferred
     */
    function transferFrom(address from, address to, uint256 tokenId) public {
        //solhint-disable-next-line max-line-length
        require(_isApprovedOrOwner(msg.sender, tokenId), "ERC721: transfer caller is not owner nor approved");

        _transferFrom(from, to, tokenId);
    }

    /**
     * @dev Safely transfers the ownership of a given token ID to another address
     * If the target address is a contract, it must implement `onERC721Received`,
     * which is called upon a safe transfer, and return the magic value
     * `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`; otherwise,
     * the transfer is reverted.
     * Requires the msg.sender to be the owner, approved, or operator
     * @param from current owner of the token
     * @param to address to receive the ownership of the given token ID
     * @param tokenId uint256 ID of the token to be transferred
     */
    function safeTransferFrom(address from, address to, uint256 tokenId) public {
        safeTransferFrom(from, to, tokenId, "");
    }

    /**
     * @dev Safely transfers the ownership of a given token ID to another address
     * If the target address is a contract, it must implement `onERC721Received`,
     * which is called upon a safe transfer, and return the magic value
     * `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`; otherwise,
     * the transfer is reverted.
     * Requires the msg.sender to be the owner, approved, or operator
     * @param from current owner of the token
     * @param to address to receive the ownership of the given token ID
     * @param tokenId uint256 ID of the token to be transferred
     * @param _data bytes data to send along with a safe transfer check
     */
    function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory _data) public {
        transferFrom(from, to, tokenId);
        require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer");
    }

    /**
     * @dev Returns whether the specified token exists.
     * @param tokenId uint256 ID of the token to query the existence of
     * @return bool whether the token exists
     */
    function _exists(uint256 tokenId) internal view returns (bool) {
        address owner = _tokenOwner[tokenId];
        return owner != address(0);
    }

    /**
     * @dev Returns whether the given spender can transfer a given token ID.
     * @param spender address of the spender to query
     * @param tokenId uint256 ID of the token to be transferred
     * @return bool whether the msg.sender is approved for the given token ID,
     * is an operator of the owner, or is the owner of the token
     */
    function _isApprovedOrOwner(address spender, uint256 tokenId) internal view returns (bool) {
        require(_exists(tokenId), "ERC721: operator query for nonexistent token");
        address owner = ownerOf(tokenId);
        return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender));
    }

    /**
     * @dev Internal function to mint a new token.
     * Reverts if the given token ID already exists.
     * @param to The address that will own the minted token
     * @param tokenId uint256 ID of the token to be minted
     */
    function _mint(address to, uint256 tokenId) internal {
        require(to != address(0), "ERC721: mint to the zero address");
        require(!_exists(tokenId), "ERC721: token already minted");

        _tokenOwner[tokenId] = to;
        _ownedTokensCount[to].increment();

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

    /**
     * @dev Internal function to burn a specific token.
     * Reverts if the token does not exist.
     * Deprecated, use _burn(uint256) instead.
     * @param owner owner of the token to burn
     * @param tokenId uint256 ID of the token being burned
     */
    function _burn(address owner, uint256 tokenId) internal {
        require(ownerOf(tokenId) == owner, "ERC721: burn of token that is not own");

        _clearApproval(tokenId);

        _ownedTokensCount[owner].decrement();
        _tokenOwner[tokenId] = address(0);

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

    /**
     * @dev Internal function to burn a specific token.
     * Reverts if the token does not exist.
     * @param tokenId uint256 ID of the token being burned
     */
    function _burn(uint256 tokenId) internal {
        _burn(ownerOf(tokenId), tokenId);
    }

    /**
     * @dev Internal function to transfer ownership of a given token ID to another address.
     * As opposed to transferFrom, this imposes no restrictions on msg.sender.
     * @param from current owner of the token
     * @param to address to receive the ownership of the given token ID
     * @param tokenId uint256 ID of the token to be transferred
     */
    function _transferFrom(address from, address to, uint256 tokenId) internal {
        require(ownerOf(tokenId) == from, "ERC721: transfer of token that is not own");
        require(to != address(0), "ERC721: transfer to the zero address");

        _clearApproval(tokenId);

        _ownedTokensCount[from].decrement();
        _ownedTokensCount[to].increment();

        _tokenOwner[tokenId] = to;

        emit Transfer(from, to, tokenId);
    }

    /**
     * @dev Internal function to invoke `onERC721Received` on a target address.
     * The call is not executed if the target address is not a contract.
     *
     * This function is deprecated.
     * @param from address representing the previous owner of the given token ID
     * @param to target address that will receive the tokens
     * @param tokenId uint256 ID of the token to be transferred
     * @param _data bytes optional data to send along with the call
     * @return bool whether the call correctly returned the expected magic value
     */
    function _checkOnERC721Received(address from, address to, uint256 tokenId, bytes memory _data)
        internal returns (bool)
    {
        if (!to.isContract()) {
            return true;
        }

        bytes4 retval = IERC721Receiver(to).onERC721Received(msg.sender, from, tokenId, _data);
        return (retval == _ERC721_RECEIVED);
    }

    /**
     * @dev Private function to clear current approval of a given token ID.
     * @param tokenId uint256 ID of the token to be transferred
     */
    function _clearApproval(uint256 tokenId) private {
        if (_tokenApprovals[tokenId] != address(0)) {
            _tokenApprovals[tokenId] = address(0);
        }
    }
}

/**
 * @title ERC721 Burnable Token
 * @dev ERC721 Token that can be irreversibly burned (destroyed).
 */
contract ERC721Burnable is ERC721 {
    /**
     * @dev Burns a specific ERC721 token.
     * @param tokenId uint256 id of the ERC721 token to be burned.
     */
    function burn(uint256 tokenId) public {
        //solhint-disable-next-line max-line-length
        require(_isApprovedOrOwner(msg.sender, tokenId), "ERC721Burnable: caller is not owner nor approved");
        _burn(tokenId);
    }
}

// solium-disable error-reason
/**
 * @title ControllerRole
 * @dev An Controller role defined using the Open Zeppelin Role system.
 */
contract ControllerRole {

    using Roles for Roles.Role;

    // NOTE: Commented out standard Role events to save gas.
    // event ControllerAdded(address indexed account);
    // event ControllerRemoved(address indexed account);

    Roles.Role private _controllers;

    constructor () public {
        _addController(msg.sender);
    }

    modifier onlyController() {
        require(isController(msg.sender));
        _;
    }

    function isController(address account) public view returns (bool) {
        return _controllers.has(account);
    }

    function addController(address account) public onlyController {
        _addController(account);
    }

    function renounceController() public {
        _removeController(msg.sender);
    }

    function _addController(address account) internal {
        _controllers.add(account);
        // emit ControllerAdded(account);
    }

    function _removeController(address account) internal {
        _controllers.remove(account);
        // emit ControllerRemoved(account);
    }

}

// solium-disable no-empty-blocks,error-reason
/**
 * @title Registry
 * @dev An ERC721 Token see https://eips.ethereum.org/EIPS/eip-721. With
 * additional functions so other trusted contracts to interact with the tokens.
 */
contract Registry is IRegistry, ControllerRole, ERC721Burnable {

    // Optional mapping for token URIs
    mapping(uint256 => string) internal _tokenURIs;

    string internal _prefix;

    // Mapping from token ID to resolver address
    mapping (uint256 => address) internal _tokenResolvers;

    // uint256(keccak256(abi.encodePacked(uint256(0x0), keccak256(abi.encodePacked("crypto")))))
    uint256 private constant _CRYPTO_HASH =
        0x0f4a10a4f46c288cea365fcf45cccf0e9d901b945b9829ccdb54c10dc3cb7a6f;

    modifier onlyApprovedOrOwner(uint256 tokenId) {
        require(_isApprovedOrOwner(msg.sender, tokenId));
        _;
    }

    constructor () public {
        _mint(address(0xdead), _CRYPTO_HASH);
        // register the supported interfaces to conform to ERC721 via ERC165
        _registerInterface(0x5b5e139f); // ERC721 Metadata Interface
        _tokenURIs[root()] = "crypto";
        emit NewURI(root(), "crypto");
    }

    /// ERC721 Metadata extension

    function name() external view returns (string memory) {
        return ".crypto";
    }

    function symbol() external view returns (string memory) {
        return "UD";
    }

    function tokenURI(uint256 tokenId) external view returns (string memory) {
        require(_exists(tokenId));
        return string(abi.encodePacked(_prefix, _tokenURIs[tokenId]));
    }

    function controlledSetTokenURIPrefix(string calldata prefix) external onlyController {
        _prefix = prefix;
        emit NewURIPrefix(prefix);
    }

    /// Ownership

    function isApprovedOrOwner(address spender, uint256 tokenId) external view returns (bool) {
        return _isApprovedOrOwner(spender, tokenId);
    }

    /// Registry Constants

    function root() public pure returns (uint256) {
        return _CRYPTO_HASH;
    }

    function childIdOf(uint256 tokenId, string calldata label) external pure returns (uint256) {
        return _childId(tokenId, label);
    }

    /// Minting

    function mintChild(address to, uint256 tokenId, string calldata label) external onlyApprovedOrOwner(tokenId) {
        _mintChild(to, tokenId, label);
    }

    function controlledMintChild(address to, uint256 tokenId, string calldata label) external onlyController {
        _mintChild(to, tokenId, label);
    }

    function safeMintChild(address to, uint256 tokenId, string calldata label) external onlyApprovedOrOwner(tokenId) {
        _safeMintChild(to, tokenId, label, "");
    }

    function safeMintChild(address to, uint256 tokenId, string calldata label, bytes calldata _data)
        external
        onlyApprovedOrOwner(tokenId)
    {
        _safeMintChild(to, tokenId, label, _data);
    }

    function controlledSafeMintChild(address to, uint256 tokenId, string calldata label, bytes calldata _data)
        external
        onlyController
    {
        _safeMintChild(to, tokenId, label, _data);
    }

    /// Transfering

    function setOwner(address to, uint256 tokenId) external onlyApprovedOrOwner(tokenId)  {
        super._transferFrom(ownerOf(tokenId), to, tokenId);
    }

    function transferFromChild(address from, address to, uint256 tokenId, string calldata label)
        external
        onlyApprovedOrOwner(tokenId)
    {
        _transferFrom(from, to, _childId(tokenId, label));
    }

    function controlledTransferFrom(address from, address to, uint256 tokenId) external onlyController {
        _transferFrom(from, to, tokenId);
    }

    function safeTransferFromChild(
        address from,
        address to,
        uint256 tokenId,
        string memory label,
        bytes memory _data
    ) public onlyApprovedOrOwner(tokenId) {
        uint256 childId = _childId(tokenId, label);
        _transferFrom(from, to, childId);
        require(_checkOnERC721Received(from, to, childId, _data));
    }

    function safeTransferFromChild(address from, address to, uint256 tokenId, string calldata label) external {
        safeTransferFromChild(from, to, tokenId, label, "");
    }

    function controlledSafeTransferFrom(address from, address to, uint256 tokenId, bytes calldata _data)
        external
        onlyController
    {
        _transferFrom(from, to, tokenId);
        require(_checkOnERC721Received(from, to, tokenId, _data));
    }

    /// Burning

    function burnChild(uint256 tokenId, string calldata label) external onlyApprovedOrOwner(tokenId) {
        _burn(_childId(tokenId, label));
    }

    function controlledBurn(uint256 tokenId) external onlyController {
        _burn(tokenId);
    }

    /// Resolution

    function resolverOf(uint256 tokenId) external view returns (address) {
        address resolver = _tokenResolvers[tokenId];
        require(resolver != address(0));
        return resolver;
    }

    function resolveTo(address to, uint256 tokenId) external onlyApprovedOrOwner(tokenId) {
        _resolveTo(to, tokenId);
    }

    function controlledResolveTo(address to, uint256 tokenId) external onlyController {
        _resolveTo(to, tokenId);
    }

    function sync(uint256 tokenId, uint256 updateId) external {
        require(_tokenResolvers[tokenId] == msg.sender);
        emit Sync(msg.sender, updateId, tokenId);
    }

    /// Internal

    function _childId(uint256 tokenId, string memory label) internal pure returns (uint256) {
        require(bytes(label).length != 0);
        return uint256(keccak256(abi.encodePacked(tokenId, keccak256(abi.encodePacked(label)))));
    }

    function _mintChild(address to, uint256 tokenId, string memory label) internal {
        uint256 childId = _childId(tokenId, label);
        _mint(to, childId);

        require(bytes(label).length != 0);
        require(_exists(childId));

        bytes memory domain = abi.encodePacked(label, ".", _tokenURIs[tokenId]);

        _tokenURIs[childId] = string(domain);
        emit NewURI(childId, string(domain));
    }

    function _safeMintChild(address to, uint256 tokenId, string memory label, bytes memory _data) internal {
        _mintChild(to, tokenId, label);
        require(_checkOnERC721Received(address(0), to, _childId(tokenId, label), _data));
    }

    function _transferFrom(address from, address to, uint256 tokenId) internal {
        super._transferFrom(from, to, tokenId);
        // Clear resolver (if any)
        if (_tokenResolvers[tokenId] != address(0x0)) {
            delete _tokenResolvers[tokenId];
        }
    }

    function _burn(uint256 tokenId) internal {
        super._burn(tokenId);
        // Clear resolver (if any)
        if (_tokenResolvers[tokenId] != address(0x0)) {
            delete _tokenResolvers[tokenId];
        }
        // Clear metadata (if any)
        if (bytes(_tokenURIs[tokenId]).length != 0) {
            delete _tokenURIs[tokenId];
        }
    }

    function _resolveTo(address to, uint256 tokenId) internal {
        require(_exists(tokenId));
        emit Resolve(tokenId, to);
        _tokenResolvers[tokenId] = to;
    }

}

/**
 * @title MintingController
 * @dev Defines the functions for distribution of Second Level Domains (SLD)s.
 */
contract MintingController is IMintingController, MinterRole {

    Registry internal _registry;

    constructor (Registry registry) public {
        _registry = registry;
    }

    function registry() external view returns (address) {
        return address(_registry);
    }

    function mintSLD(address to, string memory label) public onlyMinter {
        _registry.controlledMintChild(to, _registry.root(), label);
    }

    function safeMintSLD(address to, string calldata label) external {
        safeMintSLD(to, label, "");
    }

    function safeMintSLD(address to, string memory label, bytes memory _data) public onlyMinter {
        _registry.controlledSafeMintChild(to, _registry.root(), label, _data);
    }

    function mintSLDWithResolver(address to, string memory label, address resolver) public onlyMinter {
        _registry.controlledMintChild(to, _registry.root(), label);
        _registry.controlledResolveTo(resolver, _registry.childIdOf(_registry.root(), label));
    }

    function safeMintSLDWithResolver(address to, string calldata label, address resolver) external {
        safeMintSLD(to, label, "");
        _registry.controlledResolveTo(resolver, _registry.childIdOf(_registry.root(), label));
    }

    function safeMintSLDWithResolver(address to, string calldata label, address resolver, bytes calldata _data) external {
        safeMintSLD(to, label, _data);
        _registry.controlledResolveTo(resolver, _registry.childIdOf(_registry.root(), label));
    }

}

contract FreeMinter {
    string public constant NAME = 'Unstoppable Free Domains Minter';
    string public constant VERSION = '0.1.0';
    string private constant DOMAIN_NAME_PREFIX = 'udtestdev-';

    MintingController private _mintingController;
    IResolver private _resolver;
    IRegistryReader private _registry;

    constructor(MintingController mintingController, IResolver resolver, IRegistryReader registry) public {
        _mintingController = mintingController;
        _resolver = resolver;
        _registry = registry;
    }

    function claim(string calldata label) external {
        mintSLD(label, msg.sender);
    }

    function claimTo(string calldata label, address receiver) external {
        mintSLD(label, receiver);
    }

    function claimToWithRecords(string calldata label, address receiver, string[] calldata keys, string[] calldata values) external {
        string memory labelWithPrefix = mintSLD(label, receiver);
        if (keys.length == 0) {
            return;
        }
        uint256 tokenId = _registry.childIdOf(_registry.root(), labelWithPrefix);
        _resolver.preconfigure(keys, values, tokenId);
    }

    function mintSLD(string memory label, address receiver) private returns (string memory) {
        string memory labelWithPrefix = string(abi.encodePacked(DOMAIN_NAME_PREFIX, label));
        _mintingController.mintSLDWithResolver(receiver, labelWithPrefix, address(_resolver));

        return labelWithPrefix;
    }
}

Contract Security Audit

Contract ABI

[{"inputs":[{"internalType":"contract MintingController","name":"mintingController","type":"address"},{"internalType":"contract IResolver","name":"resolver","type":"address"},{"internalType":"contract IRegistryReader","name":"registry","type":"address"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"constant":true,"inputs":[],"name":"NAME","outputs":[{"internalType":"string","name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"VERSION","outputs":[{"internalType":"string","name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"string","name":"label","type":"string"}],"name":"claim","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"string","name":"label","type":"string"},{"internalType":"address","name":"receiver","type":"address"}],"name":"claimTo","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"string","name":"label","type":"string"},{"internalType":"address","name":"receiver","type":"address"},{"internalType":"string[]","name":"keys","type":"string[]"},{"internalType":"string[]","name":"values","type":"string[]"}],"name":"claimToWithRecords","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"}]

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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

000000000000000000000000b0ee56339c3253361730f50c08d3d7817ecd60ca000000000000000000000000b66dce2da6afaaa98f2013446dbcb0f4b0ab2842000000000000000000000000d1e5b0ff1287aa9f9a268759062e4ab08b9dacbe

-----Decoded View---------------
Arg [0] : mintingController (address): 0xb0EE56339C3253361730F50c08d3d7817ecD60Ca
Arg [1] : resolver (address): 0xb66DcE2DA6afAAa98F2013446dBCB0f4B0ab2842
Arg [2] : registry (address): 0xD1E5b0FF1287aA9f9A268759062E4Ab08b9Dacbe

-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 000000000000000000000000b0ee56339c3253361730f50c08d3d7817ecd60ca
Arg [1] : 000000000000000000000000b66dce2da6afaaa98f2013446dbcb0f4b0ab2842
Arg [2] : 000000000000000000000000d1e5b0ff1287aa9f9a268759062e4ab08b9dacbe


Deployed ByteCode Sourcemap

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Swarm Source

bzzr://8219e324cc6187205eb892268d0f2cadbd7a31b2df54ce1e0ee2b0c87c21f640
Block Transaction Difficulty Gas Used Reward
Block Uncle Number Difficulty Gas Used Reward
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.