// File: @ensdomains/ens/contracts/ENS.sol

pragma solidity >=0.4.24;

interface ENS {

    // Logged when the owner of a node assigns a new owner to a subnode.
    event NewOwner(bytes32 indexed node, bytes32 indexed label, address owner);

    // Logged when the owner of a node transfers ownership to a new account.
    event Transfer(bytes32 indexed node, address owner);

    // Logged when the resolver for a node changes.
    event NewResolver(bytes32 indexed node, address resolver);

    // Logged when the TTL of a node changes
    event NewTTL(bytes32 indexed node, uint64 ttl);

    // Logged when an operator is added or removed.
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    function setRecord(bytes32 node, address owner, address resolver, uint64 ttl) external;
    function setSubnodeRecord(bytes32 node, bytes32 label, address owner, address resolver, uint64 ttl) external;
    function setSubnodeOwner(bytes32 node, bytes32 label, address owner) external returns(bytes32);
    function setResolver(bytes32 node, address resolver) external;
    function setOwner(bytes32 node, address owner) external;
    function setTTL(bytes32 node, uint64 ttl) external;
    function setApprovalForAll(address operator, bool approved) external;
    function owner(bytes32 node) external view returns (address);
    function resolver(bytes32 node) external view returns (address);
    function ttl(bytes32 node) external view returns (uint64);
    function recordExists(bytes32 node) external view returns (bool);
    function isApprovedForAll(address owner, address operator) external view returns (bool);
}

// File: @ensdomains/ens/contracts/ReverseRegistrar.sol

pragma solidity ^0.5.0;


contract Resolver {
    function setName(bytes32 node, string memory name) public;
}

contract ReverseRegistrar {
    // namehash('addr.reverse')
    bytes32 public constant ADDR_REVERSE_NODE = 0x91d1777781884d03a6757a803996e38de2a42967fb37eeaca72729271025a9e2;

    ENS public ens;
    Resolver public defaultResolver;

    /**
     * @dev Constructor
     * @param ensAddr The address of the ENS registry.
     * @param resolverAddr The address of the default reverse resolver.
     */
    constructor(ENS ensAddr, Resolver resolverAddr) public {
        ens = ensAddr;
        defaultResolver = resolverAddr;

        // Assign ownership of the reverse record to our deployer
        ReverseRegistrar oldRegistrar = ReverseRegistrar(ens.owner(ADDR_REVERSE_NODE));
        if (address(oldRegistrar) != address(0x0)) {
            oldRegistrar.claim(msg.sender);
        }
    }
    
    /**
     * @dev Transfers ownership of the reverse ENS record associated with the
     *      calling account.
     * @param owner The address to set as the owner of the reverse record in ENS.
     * @return The ENS node hash of the reverse record.
     */
    function claim(address owner) public returns (bytes32) {
        return claimWithResolver(owner, address(0x0));
    }

    /**
     * @dev Transfers ownership of the reverse ENS record associated with the
     *      calling account.
     * @param owner The address to set as the owner of the reverse record in ENS.
     * @param resolver The address of the resolver to set; 0 to leave unchanged.
     * @return The ENS node hash of the reverse record.
     */
    function claimWithResolver(address owner, address resolver) public returns (bytes32) {
        bytes32 label = sha3HexAddress(msg.sender);
        bytes32 node = keccak256(abi.encodePacked(ADDR_REVERSE_NODE, label));
        address currentOwner = ens.owner(node);

        // Update the resolver if required
        if (resolver != address(0x0) && resolver != ens.resolver(node)) {
            // Transfer the name to us first if it's not already
            if (currentOwner != address(this)) {
                ens.setSubnodeOwner(ADDR_REVERSE_NODE, label, address(this));
                currentOwner = address(this);
            }
            ens.setResolver(node, resolver);
        }

        // Update the owner if required
        if (currentOwner != owner) {
            ens.setSubnodeOwner(ADDR_REVERSE_NODE, label, owner);
        }

        return node;
    }

    /**
     * @dev Sets the `name()` record for the reverse ENS record associated with
     * the calling account. First updates the resolver to the default reverse
     * resolver if necessary.
     * @param name The name to set for this address.
     * @return The ENS node hash of the reverse record.
     */
    function setName(string memory name) public returns (bytes32) {
        bytes32 node = claimWithResolver(address(this), address(defaultResolver));
        defaultResolver.setName(node, name);
        return node;
    }

    /**
     * @dev Returns the node hash for a given account's reverse records.
     * @param addr The address to hash
     * @return The ENS node hash.
     */
    function node(address addr) public pure returns (bytes32) {
        return keccak256(abi.encodePacked(ADDR_REVERSE_NODE, sha3HexAddress(addr)));
    }

    /**
     * @dev An optimised function to compute the sha3 of the lower-case
     *      hexadecimal representation of an Ethereum address.
     * @param addr The address to hash
     * @return The SHA3 hash of the lower-case hexadecimal encoding of the
     *         input address.
     */
    function sha3HexAddress(address addr) private pure returns (bytes32 ret) {
        addr;
        ret; // Stop warning us about unused variables
        assembly {
            let lookup := 0x3031323334353637383961626364656600000000000000000000000000000000

            for { let i := 40 } gt(i, 0) { } {
                i := sub(i, 1)
                mstore8(i, byte(and(addr, 0xf), lookup))
                addr := div(addr, 0x10)
                i := sub(i, 1)
                mstore8(i, byte(and(addr, 0xf), lookup))
                addr := div(addr, 0x10)
            }

            ret := keccak256(0, 40)
        }
    }
}

// File: @ensdomains/ens/contracts/ENS.sol

pragma solidity >=0.4.24;

interface ENS {

    // Logged when the owner of a node assigns a new owner to a subnode.
    event NewOwner(bytes32 indexed node, bytes32 indexed label, address owner);

    // Logged when the owner of a node transfers ownership to a new account.
    event Transfer(bytes32 indexed node, address owner);

    // Logged when the resolver for a node changes.
    event NewResolver(bytes32 indexed node, address resolver);

    // Logged when the TTL of a node changes
    event NewTTL(bytes32 indexed node, uint64 ttl);

    // Logged when an operator is added or removed.
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    function setRecord(bytes32 node, address owner, address resolver, uint64 ttl) external;
    function setSubnodeRecord(bytes32 node, bytes32 label, address owner, address resolver, uint64 ttl) external;
    function setSubnodeOwner(bytes32 node, bytes32 label, address owner) external returns(bytes32);
    function setResolver(bytes32 node, address resolver) external;
    function setOwner(bytes32 node, address owner) external;
    function setTTL(bytes32 node, uint64 ttl) external;
    function setApprovalForAll(address operator, bool approved) external;
    function owner(bytes32 node) external view returns (address);
    function resolver(bytes32 node) external view returns (address);
    function ttl(bytes32 node) external view returns (uint64);
    function recordExists(bytes32 node) external view returns (bool);
    function isApprovedForAll(address owner, address operator) external view returns (bool);
}

// File: @ensdomains/ens/contracts/ENSRegistry.sol

pragma solidity ^0.5.0;


/**
 * The ENS registry contract.
 */
contract ENSRegistry is ENS {

    struct Record {
        address owner;
        address resolver;
        uint64 ttl;
    }

    mapping (bytes32 => Record) records;
    mapping (address => mapping(address => bool)) operators;

    // Permits modifications only by the owner of the specified node.
    modifier authorised(bytes32 node) {
        address owner = records[node].owner;
        require(owner == msg.sender || operators[owner][msg.sender]);
        _;
    }

    /**
     * @dev Constructs a new ENS registrar.
     */
    constructor() public {
        records[0x0].owner = msg.sender;
    }

    /**
     * @dev Sets the record for a node.
     * @param node The node to update.
     * @param owner The address of the new owner.
     * @param resolver The address of the resolver.
     * @param ttl The TTL in seconds.
     */
    function setRecord(bytes32 node, address owner, address resolver, uint64 ttl) external {
        setOwner(node, owner);
        _setResolverAndTTL(node, resolver, ttl);
    }

    /**
     * @dev Sets the record for a subnode.
     * @param node The parent node.
     * @param label The hash of the label specifying the subnode.
     * @param owner The address of the new owner.
     * @param resolver The address of the resolver.
     * @param ttl The TTL in seconds.
     */
    function setSubnodeRecord(bytes32 node, bytes32 label, address owner, address resolver, uint64 ttl) external {
        bytes32 subnode = setSubnodeOwner(node, label, owner);
        _setResolverAndTTL(subnode, resolver, ttl);
    }

    /**
     * @dev Transfers ownership of a node to a new address. May only be called by the current owner of the node.
     * @param node The node to transfer ownership of.
     * @param owner The address of the new owner.
     */
    function setOwner(bytes32 node, address owner) public authorised(node) {
        _setOwner(node, owner);
        emit Transfer(node, owner);
    }

    /**
     * @dev Transfers ownership of a subnode keccak256(node, label) to a new address. May only be called by the owner of the parent node.
     * @param node The parent node.
     * @param label The hash of the label specifying the subnode.
     * @param owner The address of the new owner.
     */
    function setSubnodeOwner(bytes32 node, bytes32 label, address owner) public authorised(node) returns(bytes32) {
        bytes32 subnode = keccak256(abi.encodePacked(node, label));
        _setOwner(subnode, owner);
        emit NewOwner(node, label, owner);
        return subnode;
    }

    /**
     * @dev Sets the resolver address for the specified node.
     * @param node The node to update.
     * @param resolver The address of the resolver.
     */
    function setResolver(bytes32 node, address resolver) public authorised(node) {
        emit NewResolver(node, resolver);
        records[node].resolver = resolver;
    }

    /**
     * @dev Sets the TTL for the specified node.
     * @param node The node to update.
     * @param ttl The TTL in seconds.
     */
    function setTTL(bytes32 node, uint64 ttl) public authorised(node) {
        emit NewTTL(node, ttl);
        records[node].ttl = ttl;
    }

    /**
     * @dev Enable or disable approval for a third party ("operator") to manage
     *  all of `msg.sender`'s ENS records. Emits the ApprovalForAll event.
     * @param operator Address to add to the set of authorized operators.
     * @param approved True if the operator is approved, false to revoke approval.
     */
    function setApprovalForAll(address operator, bool approved) external {
        operators[msg.sender][operator] = approved;
        emit ApprovalForAll(msg.sender, operator, approved);
    }

    /**
     * @dev Returns the address that owns the specified node.
     * @param node The specified node.
     * @return address of the owner.
     */
    function owner(bytes32 node) public view returns (address) {
        address addr = records[node].owner;
        if (addr == address(this)) {
            return address(0x0);
        }

        return addr;
    }

    /**
     * @dev Returns the address of the resolver for the specified node.
     * @param node The specified node.
     * @return address of the resolver.
     */
    function resolver(bytes32 node) public view returns (address) {
        return records[node].resolver;
    }

    /**
     * @dev Returns the TTL of a node, and any records associated with it.
     * @param node The specified node.
     * @return ttl of the node.
     */
    function ttl(bytes32 node) public view returns (uint64) {
        return records[node].ttl;
    }

    /**
     * @dev Returns whether a record has been imported to the registry.
     * @param node The specified node.
     * @return Bool if record exists
     */
    function recordExists(bytes32 node) public view returns (bool) {
        return records[node].owner != address(0x0);
    }

    /**
     * @dev Query if an address is an authorized operator for another address.
     * @param owner The address that owns the records.
     * @param operator The address that acts on behalf of the owner.
     * @return True if `operator` is an approved operator for `owner`, false otherwise.
     */
    function isApprovedForAll(address owner, address operator) external view returns (bool) {
        return operators[owner][operator];
    }

    function _setOwner(bytes32 node, address owner) internal {
        records[node].owner = owner;
    }

    function _setResolverAndTTL(bytes32 node, address resolver, uint64 ttl) internal {
        if(resolver != records[node].resolver) {
            records[node].resolver = resolver;
            emit NewResolver(node, resolver);
        }

        if(ttl != records[node].ttl) {
            records[node].ttl = ttl;
            emit NewTTL(node, ttl);
        }
    }
}

// File: @ensdomains/ens/contracts/ENSRegistryWithFallback.sol

pragma solidity ^0.5.0;



/**
 * The ENS registry contract.
 */
contract ENSRegistryWithFallback is ENSRegistry {

    ENS public old;

    /**
     * @dev Constructs a new ENS registrar.
     */
    constructor(ENS _old) public ENSRegistry() {
        old = _old;
    }

    /**
     * @dev Returns the address of the resolver for the specified node.
     * @param node The specified node.
     * @return address of the resolver.
     */
    function resolver(bytes32 node) public view returns (address) {
        if (!recordExists(node)) {
            return old.resolver(node);
        }

        return super.resolver(node);
    }

    /**
     * @dev Returns the address that owns the specified node.
     * @param node The specified node.
     * @return address of the owner.
     */
    function owner(bytes32 node) public view returns (address) {
        if (!recordExists(node)) {
            return old.owner(node);
        }

        return super.owner(node);
    }

    /**
     * @dev Returns the TTL of a node, and any records associated with it.
     * @param node The specified node.
     * @return ttl of the node.
     */
    function ttl(bytes32 node) public view returns (uint64) {
        if (!recordExists(node)) {
            return old.ttl(node);
        }

        return super.ttl(node);
    }

    function _setOwner(bytes32 node, address owner) internal {
        address addr = owner;
        if (addr == address(0x0)) {
            addr = address(this);
        }

        super._setOwner(node, addr);
    }
}

;;; --------------------------------------------------------------------------- 
;;; @title The Ethereum Name Service registry. 
;;; @author Daniel Ellison <daniel@syrinx.net> 
 
(seq 
 
  ;; -------------------------------------------------------------------------- 
  ;; Constant definitions. 
 
  ;; Memory layout. 
  (def 'node-bytes  0x00) 
  (def 'label-bytes 0x20) 
  (def 'call-result 0x40) 
 
  ;; Struct: Record 
  (def 'resolver 0x00) ; address 
  (def 'owner    0x20) ; address 
  (def 'ttl      0x40) ; uint64 
 
  ;; Precomputed function IDs. 
  (def 'get-node-owner    0x02571be3) ; owner(bytes32) 
  (def 'get-node-resolver 0x0178b8bf) ; resolver(bytes32) 
  (def 'get-node-ttl      0x16a25cbd) ; ttl(bytes32) 
  (def 'set-node-owner    0x5b0fc9c3) ; setOwner(bytes32,address) 
  (def 'set-subnode-owner 0x06ab5923) ; setSubnodeOwner(bytes32,bytes32,address) 
  (def 'set-node-resolver 0x1896f70a) ; setResolver(bytes32,address) 
  (def 'set-node-ttl      0x14ab9038) ; setTTL(bytes32,uint64) 
 
  ;; Jumping here causes an EVM error. 
  (def 'invalid-location 0x02) 
 
  ;; -------------------------------------------------------------------------- 
  ;; @notice Shifts the leftmost 4 bytes of a 32-byte number right by 28 bytes. 
  ;; @param input A 32-byte number. 
 
  (def 'shift-right (input) 
    (div input (exp 2 224))) 
 
  ;; -------------------------------------------------------------------------- 
  ;; @notice Determines whether the supplied function ID matches a known 
  ;;         function hash and executes <code-body> if so. 
  ;; @dev The function ID is in the leftmost four bytes of the call data. 
  ;; @param function-hash The four-byte hash of a known function signature. 
  ;; @param code-body The code to run in the case of a match. 
 
  (def 'function (function-hash code-body) 
    (when (= (shift-right (calldataload 0x00)) function-hash) 
      code-body)) 
 
  ;; -------------------------------------------------------------------------- 
  ;; @notice Calculates record location for the node and label passed in. 
  ;; @param node The parent node. 
  ;; @param label The hash of the subnode label. 
 
  (def 'get-record (node label) 
    (seq 
      (mstore node-bytes node) 
      (mstore label-bytes label) 
      (sha3 node-bytes 64))) 
 
  ;; -------------------------------------------------------------------------- 
  ;; @notice Retrieves owner from node record. 
  ;; @param node Get owner of this node. 
 
  (def 'get-owner (node) 
    (sload (+ node owner))) 
 
  ;; -------------------------------------------------------------------------- 
  ;; @notice Stores new owner in node record. 
  ;; @param node Set owner of this node. 
  ;; @param new-owner New owner of this node. 
 
  (def 'set-owner (node new-owner) 
    (sstore (+ node owner) new-owner)) 
 
  ;; -------------------------------------------------------------------------- 
  ;; @notice Stores new subnode owner in node record. 
  ;; @param node Set owner of this node. 
  ;; @param label The hash of the label specifying the subnode. 
  ;; @param new-owner New owner of the subnode. 
 
  (def 'set-subowner (node label new-owner) 
    (sstore (+ (get-record node label) owner) new-owner)) 
 
  ;; -------------------------------------------------------------------------- 
  ;; @notice Retrieves resolver from node record. 
  ;; @param node Get resolver of this node. 
 
  (def 'get-resolver (node) 
    (sload node)) 
 
  ;; -------------------------------------------------------------------------- 
  ;; @notice Stores new resolver in node record. 
  ;; @param node Set resolver of this node. 
  ;; @param new-resolver New resolver for this node. 
 
  (def 'set-resolver (node new-resolver) 
    (sstore node new-resolver)) 
 
  ;; -------------------------------------------------------------------------- 
  ;; @notice Retrieves TTL From node record. 
  ;; @param node Get TTL of this node. 
 
  (def 'get-ttl (node) 
    (sload (+ node ttl))) 
 
  ;; -------------------------------------------------------------------------- 
  ;; @notice Stores new TTL in node record. 
  ;; @param node Set TTL of this node. 
  ;; @param new-resolver New TTL for this node. 
 
  (def 'set-ttl (node new-ttl) 
    (sstore (+ node ttl) new-ttl)) 
 
  ;; -------------------------------------------------------------------------- 
  ;; @notice Checks that the caller is the node owner. 
  ;; @param node Check owner of this node. 
 
  (def 'only-node-owner (node) 
    (when (!= (caller) (get-owner node)) 
      (jump invalid-location))) 
 
  ;; -------------------------------------------------------------------------- 
  ;; INIT 
 
  ;; Set the owner of the root node (0x00) to the deploying account. 
  (set-owner 0x00 (caller)) 
 
  ;; -------------------------------------------------------------------------- 
  ;; CODE 
 
  (returnlll 
    (seq 
 
      ;; ---------------------------------------------------------------------- 
      ;; @notice Returns the address of the resolver for the specified node. 
      ;; @dev Signature: resolver(bytes32) 
      ;; @param node Return this node's resolver. 
      ;; @return The associated resolver. 
 
      (def 'node (calldataload 0x04)) 
 
      (function get-node-resolver 
        (seq 
 
          ;; Get the node's resolver and save it. 
          (mstore call-result (get-resolver node)) 
 
          ;; Return result. 
          (return call-result 32))) 
 
      ;; ---------------------------------------------------------------------- 
      ;; @notice Returns the address that owns the specified node. 
      ;; @dev Signature: owner(bytes32) 
      ;; @param node Return this node's owner. 
      ;; @return The associated address. 
 
      (def 'node (calldataload 0x04)) 
 
      (function get-node-owner 
        (seq 
 
          ;; Get the node's owner and save it. 
          (mstore call-result (get-owner node)) 
 
          ;; Return result. 
          (return call-result 32))) 
 
      ;; ---------------------------------------------------------------------- 
      ;; @notice Returns the TTL of a node and any records associated with it. 
      ;; @dev Signature: ttl(bytes32) 
      ;; @param node Return this node's TTL. 
      ;; @return The node's TTL. 
 
      (def 'node (calldataload 0x04)) 
 
      (function get-node-ttl 
        (seq 
 
          ;; Get the node's TTL and save it. 
          (mstore call-result (get-ttl node)) 
 
          ;; Return result. 
          (return call-result 32))) 
 
      ;; ---------------------------------------------------------------------- 
      ;; @notice Transfers ownership of a node to a new address. May only be 
      ;;         called by the current owner of the node. 
      ;; @dev Signature: setOwner(bytes32,address) 
      ;; @param node The node to transfer ownership of. 
      ;; @param new-owner The address of the new owner. 
 
      (def 'node (calldataload 0x04)) 
      (def 'new-owner (calldataload 0x24)) 
 
      (function set-node-owner 
        (seq (only-node-owner node) 
 
          ;; Transfer ownership by storing passed-in address. 
          (set-owner node new-owner) 
 
          ;; Emit an event about the transfer. 
          ;; Transfer(bytes32 indexed node, address owner); 
          (mstore call-result new-owner) 
          (log2 call-result 32 
              (sha3 0x00 (lit 0x00 "Transfer(bytes32,address)")) node) 
 
          ;; Nothing to return. 
          (stop))) 
 
      ;; ---------------------------------------------------------------------- 
      ;; @notice Transfers ownership of a subnode to a new address. May only be 
      ;;         called by the owner of the parent node. 
      ;; @dev Signature: setSubnodeOwner(bytes32,bytes32,address) 
      ;; @param node The parent node. 
      ;; @param label The hash of the label specifying the subnode. 
      ;; @param new-owner The address of the new owner. 
 
      (def 'node (calldataload 0x04)) 
      (def 'label (calldataload 0x24)) 
      (def 'new-owner (calldataload 0x44)) 
 
      (function set-subnode-owner 
        (seq (only-node-owner node) 
 
          ;; Transfer ownership by storing passed-in address. 
          (set-subowner node label new-owner) 
 
          ;; Emit an event about the transfer. 
          ;; NewOwner(bytes32 indexed node, bytes32 indexed label, address owner); 
          (mstore call-result new-owner) 
          (log3 call-result 32 
              (sha3 0x00 (lit 0x00 "NewOwner(bytes32,bytes32,address)")) 
              node label) 
 
          ;; Nothing to return. 
          (stop))) 
 
      ;; ---------------------------------------------------------------------- 
      ;; @notice Sets the resolver address for the specified node. 
      ;; @dev Signature: setResolver(bytes32,address) 
      ;; @param node The node to update. 
      ;; @param new-resolver The address of the resolver. 
 
      (def 'node (calldataload 0x04)) 
      (def 'new-resolver (calldataload 0x24)) 
 
      (function set-node-resolver 
        (seq (only-node-owner node) 
 
          ;; Transfer ownership by storing passed-in address. 
          (set-resolver node new-resolver) 
 
          ;; Emit an event about the change of resolver. 
          ;; NewResolver(bytes32 indexed node, address resolver); 
          (mstore call-result new-resolver) 
          (log2 call-result 32 
              (sha3 0x00 (lit 0x00 "NewResolver(bytes32,address)")) node) 
 
          ;; Nothing to return. 
          (stop))) 
 
      ;; ---------------------------------------------------------------------- 
      ;; @notice Sets the TTL for the specified node. 
      ;; @dev Signature: setTTL(bytes32,uint64) 
      ;; @param node The node to update. 
      ;; @param ttl The TTL in seconds. 
 
      (def 'node (calldataload 0x04)) 
      (def 'new-ttl (calldataload 0x24)) 
 
      (function set-node-ttl 
        (seq (only-node-owner node) 
 
          ;; Set new TTL by storing passed-in time. 
          (set-ttl node new-ttl) 
 
          ;; Emit an event about the change of TTL. 
          ;; NewTTL(bytes32 indexed node, uint64 ttl); 
          (mstore call-result new-ttl) 
          (log2 call-result 32 
              (sha3 0x00 (lit 0x00 "NewTTL(bytes32,uint64)")) node) 
 
          ;; Nothing to return. 
          (stop))) 
 
      ;; ---------------------------------------------------------------------- 
      ;; @notice Fallback: No functions matched the function ID provided. 
 
      (jump invalid-location))) 
 
)

// File: @ensdomains/ens/contracts/ENS.sol

pragma solidity >=0.4.24;

interface ENS {

    // Logged when the owner of a node assigns a new owner to a subnode.
    event NewOwner(bytes32 indexed node, bytes32 indexed label, address owner);

    // Logged when the owner of a node transfers ownership to a new account.
    event Transfer(bytes32 indexed node, address owner);

    // Logged when the resolver for a node changes.
    event NewResolver(bytes32 indexed node, address resolver);

    // Logged when the TTL of a node changes
    event NewTTL(bytes32 indexed node, uint64 ttl);

    // Logged when an operator is added or removed.
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    function setRecord(bytes32 node, address owner, address resolver, uint64 ttl) external;
    function setSubnodeRecord(bytes32 node, bytes32 label, address owner, address resolver, uint64 ttl) external;
    function setSubnodeOwner(bytes32 node, bytes32 label, address owner) external returns(bytes32);
    function setResolver(bytes32 node, address resolver) external;
    function setOwner(bytes32 node, address owner) external;
    function setTTL(bytes32 node, uint64 ttl) external;
    function setApprovalForAll(address operator, bool approved) external;
    function owner(bytes32 node) external view returns (address);
    function resolver(bytes32 node) external view returns (address);
    function ttl(bytes32 node) external view returns (uint64);
    function recordExists(bytes32 node) external view returns (bool);
    function isApprovedForAll(address owner, address operator) external view returns (bool);
}

// File: @ensdomains/ens/contracts/ReverseRegistrar.sol

pragma solidity ^0.5.0;


contract Resolver {
    function setName(bytes32 node, string memory name) public;
}

contract ReverseRegistrar {
    // namehash('addr.reverse')
    bytes32 public constant ADDR_REVERSE_NODE = 0x91d1777781884d03a6757a803996e38de2a42967fb37eeaca72729271025a9e2;

    ENS public ens;
    Resolver public defaultResolver;

    /**
     * @dev Constructor
     * @param ensAddr The address of the ENS registry.
     * @param resolverAddr The address of the default reverse resolver.
     */
    constructor(ENS ensAddr, Resolver resolverAddr) public {
        ens = ensAddr;
        defaultResolver = resolverAddr;

        // Assign ownership of the reverse record to our deployer
        ReverseRegistrar oldRegistrar = ReverseRegistrar(ens.owner(ADDR_REVERSE_NODE));
        if (address(oldRegistrar) != address(0x0)) {
            oldRegistrar.claim(msg.sender);
        }
    }
    
    /**
     * @dev Transfers ownership of the reverse ENS record associated with the
     *      calling account.
     * @param owner The address to set as the owner of the reverse record in ENS.
     * @return The ENS node hash of the reverse record.
     */
    function claim(address owner) public returns (bytes32) {
        return claimWithResolver(owner, address(0x0));
    }

    /**
     * @dev Transfers ownership of the reverse ENS record associated with the
     *      calling account.
     * @param owner The address to set as the owner of the reverse record in ENS.
     * @param resolver The address of the resolver to set; 0 to leave unchanged.
     * @return The ENS node hash of the reverse record.
     */
    function claimWithResolver(address owner, address resolver) public returns (bytes32) {
        bytes32 label = sha3HexAddress(msg.sender);
        bytes32 node = keccak256(abi.encodePacked(ADDR_REVERSE_NODE, label));
        address currentOwner = ens.owner(node);

        // Update the resolver if required
        if (resolver != address(0x0) && resolver != ens.resolver(node)) {
            // Transfer the name to us first if it's not already
            if (currentOwner != address(this)) {
                ens.setSubnodeOwner(ADDR_REVERSE_NODE, label, address(this));
                currentOwner = address(this);
            }
            ens.setResolver(node, resolver);
        }

        // Update the owner if required
        if (currentOwner != owner) {
            ens.setSubnodeOwner(ADDR_REVERSE_NODE, label, owner);
        }

        return node;
    }

    /**
     * @dev Sets the `name()` record for the reverse ENS record associated with
     * the calling account. First updates the resolver to the default reverse
     * resolver if necessary.
     * @param name The name to set for this address.
     * @return The ENS node hash of the reverse record.
     */
    function setName(string memory name) public returns (bytes32) {
        bytes32 node = claimWithResolver(address(this), address(defaultResolver));
        defaultResolver.setName(node, name);
        return node;
    }

    /**
     * @dev Returns the node hash for a given account's reverse records.
     * @param addr The address to hash
     * @return The ENS node hash.
     */
    function node(address addr) public pure returns (bytes32) {
        return keccak256(abi.encodePacked(ADDR_REVERSE_NODE, sha3HexAddress(addr)));
    }

    /**
     * @dev An optimised function to compute the sha3 of the lower-case
     *      hexadecimal representation of an Ethereum address.
     * @param addr The address to hash
     * @return The SHA3 hash of the lower-case hexadecimal encoding of the
     *         input address.
     */
    function sha3HexAddress(address addr) private pure returns (bytes32 ret) {
        addr;
        ret; // Stop warning us about unused variables
        assembly {
            let lookup := 0x3031323334353637383961626364656600000000000000000000000000000000

            for { let i := 40 } gt(i, 0) { } {
                i := sub(i, 1)
                mstore8(i, byte(and(addr, 0xf), lookup))
                addr := div(addr, 0x10)
                i := sub(i, 1)
                mstore8(i, byte(and(addr, 0xf), lookup))
                addr := div(addr, 0x10)
            }

            ret := keccak256(0, 40)
        }
    }
}

// File: @ensdomains/resolver/contracts/DefaultReverseResolver.sol

pragma solidity >=0.4.25;



/**
 * @dev Provides a default implementation of a resolver for reverse records,
 * which permits only the owner to update it.
 */
contract DefaultReverseResolver {
    // namehash('addr.reverse')
    bytes32 constant ADDR_REVERSE_NODE = 0x91d1777781884d03a6757a803996e38de2a42967fb37eeaca72729271025a9e2;

    ENS public ens;
    mapping (bytes32 => string) public name;

    /**
     * @dev Only permits calls by the reverse registrar.
     * @param node The node permission is required for.
     */
    modifier onlyOwner(bytes32 node) {
        require(msg.sender == ens.owner(node));
        _;
    }

    /**
     * @dev Constructor
     * @param ensAddr The address of the ENS registry.
     */
    constructor(ENS ensAddr) public {
        ens = ensAddr;

        // Assign ownership of the reverse record to our deployer
        ReverseRegistrar registrar = ReverseRegistrar(ens.owner(ADDR_REVERSE_NODE));
        if (address(registrar) != address(0x0)) {
            registrar.claim(msg.sender);
        }
    }

    /**
     * @dev Sets the name for a node.
     * @param node The node to update.
     * @param _name The name to set.
     */
    function setName(bytes32 node, string memory _name) public onlyOwner(node) {
        name[node] = _name;
    }
}