// File: contracts/PriceOracle.sol pragma solidity >=0.4.24; interface PriceOracle { /** * @dev Returns the price to register or renew a name. * @param name The name being registered or renewed. * @param expires When the name presently expires (0 if this is a new registration). * @param duration How long the name is being registered or extended for, in seconds. * @return The price of this renewal or registration, in wei. */ function price(string calldata name, uint expires, uint duration) external view returns(uint); } // 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); function setSubnodeOwner(bytes32 node, bytes32 label, address owner) external; function setResolver(bytes32 node, address resolver) external; function setOwner(bytes32 node, address owner) external; function setTTL(bytes32 node, uint64 ttl) 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); } // File: @ensdomains/ens/contracts/Deed.sol pragma solidity >=0.4.24; interface Deed { function setOwner(address payable newOwner) external; function setRegistrar(address newRegistrar) external; function setBalance(uint newValue, bool throwOnFailure) external; function closeDeed(uint refundRatio) external; function destroyDeed() external; function owner() external view returns (address); function previousOwner() external view returns (address); function value() external view returns (uint); function creationDate() external view returns (uint); } // File: @ensdomains/ens/contracts/DeedImplementation.sol pragma solidity ^0.5.0; /** * @title Deed to hold ether in exchange for ownership of a node * @dev The deed can be controlled only by the registrar and can only send ether back to the owner. */ contract DeedImplementation is Deed { address payable constant burn = address(0xdead); address payable private _owner; address private _previousOwner; address private _registrar; uint private _creationDate; uint private _value; bool active; event OwnerChanged(address newOwner); event DeedClosed(); modifier onlyRegistrar { require(msg.sender == _registrar); _; } modifier onlyActive { require(active); _; } constructor(address payable initialOwner) public payable { _owner = initialOwner; _registrar = msg.sender; _creationDate = now; active = true; _value = msg.value; } function setOwner(address payable newOwner) external onlyRegistrar { require(newOwner != address(0x0)); _previousOwner = _owner; // This allows contracts to check who sent them the ownership _owner = newOwner; emit OwnerChanged(newOwner); } function setRegistrar(address newRegistrar) external onlyRegistrar { _registrar = newRegistrar; } function setBalance(uint newValue, bool throwOnFailure) external onlyRegistrar onlyActive { // Check if it has enough balance to set the value require(_value >= newValue); _value = newValue; // Send the difference to the owner require(_owner.send(address(this).balance - newValue) || !throwOnFailure); } /** * @dev Close a deed and refund a specified fraction of the bid value * * @param refundRatio The amount*1/1000 to refund */ function closeDeed(uint refundRatio) external onlyRegistrar onlyActive { active = false; require(burn.send(((1000 - refundRatio) * address(this).balance)/1000)); emit DeedClosed(); _destroyDeed(); } /** * @dev Close a deed and refund a specified fraction of the bid value */ function destroyDeed() external { _destroyDeed(); } function owner() external view returns (address) { return _owner; } function previousOwner() external view returns (address) { return _previousOwner; } function value() external view returns (uint) { return _value; } function creationDate() external view returns (uint) { _creationDate; } function _destroyDeed() internal { require(!active); // Instead of selfdestruct(owner), invoke owner fallback function to allow // owner to log an event if desired; but owner should also be aware that // its fallback function can also be invoked by setBalance if (_owner.send(address(this).balance)) { selfdestruct(burn); } } } // File: @ensdomains/ens/contracts/Registrar.sol pragma solidity >=0.4.24; interface Registrar { enum Mode { Open, Auction, Owned, Forbidden, Reveal, NotYetAvailable } event AuctionStarted(bytes32 indexed hash, uint registrationDate); event NewBid(bytes32 indexed hash, address indexed bidder, uint deposit); event BidRevealed(bytes32 indexed hash, address indexed owner, uint value, uint8 status); event HashRegistered(bytes32 indexed hash, address indexed owner, uint value, uint registrationDate); event HashReleased(bytes32 indexed hash, uint value); event HashInvalidated(bytes32 indexed hash, string indexed name, uint value, uint registrationDate); function startAuction(bytes32 _hash) external; function startAuctions(bytes32[] calldata _hashes) external; function newBid(bytes32 sealedBid) external payable; function startAuctionsAndBid(bytes32[] calldata hashes, bytes32 sealedBid) external payable; function unsealBid(bytes32 _hash, uint _value, bytes32 _salt) external; function cancelBid(address bidder, bytes32 seal) external; function finalizeAuction(bytes32 _hash) external; function transfer(bytes32 _hash, address payable newOwner) external; function releaseDeed(bytes32 _hash) external; function invalidateName(string calldata unhashedName) external; function eraseNode(bytes32[] calldata labels) external; function transferRegistrars(bytes32 _hash) external; function acceptRegistrarTransfer(bytes32 hash, Deed deed, uint registrationDate) external; function entries(bytes32 _hash) external view returns (Mode, address, uint, uint, uint); } // File: @ensdomains/ens/contracts/HashRegistrar.sol pragma solidity ^0.5.0; /* Temporary Hash Registrar ======================== This is a simplified version of a hash registrar. It is purporsefully limited: names cannot be six letters or shorter, new auctions will stop after 4 years. The plan is to test the basic features and then move to a new contract in at most 2 years, when some sort of renewal mechanism will be enabled. */ /** * @title Registrar * @dev The registrar handles the auction process for each subnode of the node it owns. */ contract HashRegistrar is Registrar { ENS public ens; bytes32 public rootNode; mapping (bytes32 => Entry) _entries; mapping (address => mapping (bytes32 => Deed)) public sealedBids; uint32 constant totalAuctionLength = 5 days; uint32 constant revealPeriod = 48 hours; uint32 public constant launchLength = 8 weeks; uint constant minPrice = 0.01 ether; uint public registryStarted; struct Entry { Deed deed; uint registrationDate; uint value; uint highestBid; } modifier inState(bytes32 _hash, Mode _state) { require(state(_hash) == _state); _; } modifier onlyOwner(bytes32 _hash) { require(state(_hash) == Mode.Owned && msg.sender == _entries[_hash].deed.owner()); _; } modifier registryOpen() { require(now >= registryStarted && now <= registryStarted + (365 * 4) * 1 days && ens.owner(rootNode) == address(this)); _; } /** * @dev Constructs a new Registrar, with the provided address as the owner of the root node. * * @param _ens The address of the ENS * @param _rootNode The hash of the rootnode. */ constructor(ENS _ens, bytes32 _rootNode, uint _startDate) public { ens = _ens; rootNode = _rootNode; registryStarted = _startDate > 0 ? _startDate : now; } /** * @dev Start an auction for an available hash * * @param _hash The hash to start an auction on */ function startAuction(bytes32 _hash) external { _startAuction(_hash); } /** * @dev Start multiple auctions for better anonymity * * Anyone can start an auction by sending an array of hashes that they want to bid for. * Arrays are sent so that someone can open up an auction for X dummy hashes when they * are only really interested in bidding for one. This will increase the cost for an * attacker to simply bid blindly on all new auctions. Dummy auctions that are * open but not bid on are closed after a week. * * @param _hashes An array of hashes, at least one of which you presumably want to bid on */ function startAuctions(bytes32[] calldata _hashes) external { _startAuctions(_hashes); } /** * @dev Submit a new sealed bid on a desired hash in a blind auction * * Bids are sent by sending a message to the main contract with a hash and an amount. The hash * contains information about the bid, including the bidded hash, the bid amount, and a random * salt. Bids are not tied to any one auction until they are revealed. The value of the bid * itself can be masqueraded by sending more than the value of your actual bid. This is * followed by a 48h reveal period. Bids revealed after this period will be burned and the ether unrecoverable. * Since this is an auction, it is expected that most public hashes, like known domains and common dictionary * words, will have multiple bidders pushing the price up. * * @param sealedBid A sealedBid, created by the shaBid function */ function newBid(bytes32 sealedBid) external payable { _newBid(sealedBid); } /** * @dev Start a set of auctions and bid on one of them * * This method functions identically to calling `startAuctions` followed by `newBid`, * but all in one transaction. * * @param hashes A list of hashes to start auctions on. * @param sealedBid A sealed bid for one of the auctions. */ function startAuctionsAndBid(bytes32[] calldata hashes, bytes32 sealedBid) external payable { _startAuctions(hashes); _newBid(sealedBid); } /** * @dev Submit the properties of a bid to reveal them * * @param _hash The node in the sealedBid * @param _value The bid amount in the sealedBid * @param _salt The sale in the sealedBid */ function unsealBid(bytes32 _hash, uint _value, bytes32 _salt) external { bytes32 seal = shaBid(_hash, msg.sender, _value, _salt); Deed bid = sealedBids[msg.sender][seal]; require(address(bid) != address(0x0)); sealedBids[msg.sender][seal] = Deed(address(0x0)); Entry storage h = _entries[_hash]; uint value = min(_value, bid.value()); bid.setBalance(value, true); Mode auctionState = state(_hash); if (auctionState == Mode.Owned) { // Too late! Bidder loses their bid. Gets 0.5% back. bid.closeDeed(5); emit BidRevealed(_hash, msg.sender, value, 1); } else if (auctionState != Mode.Reveal) { // Invalid phase revert(); } else if (value < minPrice || bid.creationDate() > h.registrationDate - revealPeriod) { // Bid too low or too late, refund 99.5% bid.closeDeed(995); emit BidRevealed(_hash, msg.sender, value, 0); } else if (value > h.highestBid) { // New winner // Cancel the other bid, refund 99.5% if (address(h.deed) != address(0x0)) { Deed previousWinner = h.deed; previousWinner.closeDeed(995); } // Set new winner // Per the rules of a vickery auction, the value becomes the previous highestBid h.value = h.highestBid; // will be zero if there's only 1 bidder h.highestBid = value; h.deed = bid; emit BidRevealed(_hash, msg.sender, value, 2); } else if (value > h.value) { // Not winner, but affects second place h.value = value; bid.closeDeed(995); emit BidRevealed(_hash, msg.sender, value, 3); } else { // Bid doesn't affect auction bid.closeDeed(995); emit BidRevealed(_hash, msg.sender, value, 4); } } /** * @dev Cancel a bid * * @param seal The value returned by the shaBid function */ function cancelBid(address bidder, bytes32 seal) external { Deed bid = sealedBids[bidder][seal]; // If a sole bidder does not `unsealBid` in time, they have a few more days // where they can call `startAuction` (again) and then `unsealBid` during // the revealPeriod to get back their bid value. // For simplicity, they should call `startAuction` within // 9 days (2 weeks - totalAuctionLength), otherwise their bid will be // cancellable by anyone. require(address(bid) != address(0x0) && now >= bid.creationDate() + totalAuctionLength + 2 weeks); // Send the canceller 0.5% of the bid, and burn the rest. bid.setOwner(msg.sender); bid.closeDeed(5); sealedBids[bidder][seal] = Deed(0); emit BidRevealed(seal, bidder, 0, 5); } /** * @dev Finalize an auction after the registration date has passed * * @param _hash The hash of the name the auction is for */ function finalizeAuction(bytes32 _hash) external onlyOwner(_hash) { Entry storage h = _entries[_hash]; // Handles the case when there's only a single bidder (h.value is zero) h.value = max(h.value, minPrice); h.deed.setBalance(h.value, true); trySetSubnodeOwner(_hash, h.deed.owner()); emit HashRegistered(_hash, h.deed.owner(), h.value, h.registrationDate); } /** * @dev The owner of a domain may transfer it to someone else at any time. * * @param _hash The node to transfer * @param newOwner The address to transfer ownership to */ function transfer(bytes32 _hash, address payable newOwner) external onlyOwner(_hash) { require(newOwner != address(0x0)); Entry storage h = _entries[_hash]; h.deed.setOwner(newOwner); trySetSubnodeOwner(_hash, newOwner); } /** * @dev After some time, or if we're no longer the registrar, the owner can release * the name and get their ether back. * * @param _hash The node to release */ function releaseDeed(bytes32 _hash) external onlyOwner(_hash) { Entry storage h = _entries[_hash]; Deed deedContract = h.deed; require(now >= h.registrationDate + 365 days || ens.owner(rootNode) != address(this)); h.value = 0; h.highestBid = 0; h.deed = Deed(0); _tryEraseSingleNode(_hash); deedContract.closeDeed(1000); emit HashReleased(_hash, h.value); } /** * @dev Submit a name 6 characters long or less. If it has been registered, * the submitter will earn 50% of the deed value. * * We are purposefully handicapping the simplified registrar as a way * to force it into being restructured in a few years. * * @param unhashedName An invalid name to search for in the registry. */ function invalidateName(string calldata unhashedName) external inState(keccak256(abi.encode(unhashedName)), Mode.Owned) { require(strlen(unhashedName) <= 6); bytes32 hash = keccak256(abi.encode(unhashedName)); Entry storage h = _entries[hash]; _tryEraseSingleNode(hash); if (address(h.deed) != address(0x0)) { // Reward the discoverer with 50% of the deed // The previous owner gets 50% h.value = max(h.value, minPrice); h.deed.setBalance(h.value/2, false); h.deed.setOwner(msg.sender); h.deed.closeDeed(1000); } emit HashInvalidated(hash, unhashedName, h.value, h.registrationDate); h.value = 0; h.highestBid = 0; h.deed = Deed(0); } /** * @dev Allows anyone to delete the owner and resolver records for a (subdomain of) a * name that is not currently owned in the registrar. If passing, eg, 'foo.bar.eth', * the owner and resolver fields on 'foo.bar.eth' and 'bar.eth' will all be cleared. * * @param labels A series of label hashes identifying the name to zero out, rooted at the * registrar's root. Must contain at least one element. For instance, to zero * 'foo.bar.eth' on a registrar that owns '.eth', pass an array containing * [keccak256('foo'), keccak256('bar')]. */ function eraseNode(bytes32[] calldata labels) external { require(labels.length != 0); require(state(labels[labels.length - 1]) != Mode.Owned); _eraseNodeHierarchy(labels.length - 1, labels, rootNode); } /** * @dev Transfers the deed to the current registrar, if different from this one. * * Used during the upgrade process to a permanent registrar. * * @param _hash The name hash to transfer. */ function transferRegistrars(bytes32 _hash) external onlyOwner(_hash) { address registrar = ens.owner(rootNode); require(registrar != address(this)); // Migrate the deed Entry storage h = _entries[_hash]; h.deed.setRegistrar(registrar); // Call the new registrar to accept the transfer Registrar(registrar).acceptRegistrarTransfer(_hash, h.deed, h.registrationDate); // Zero out the Entry h.deed = Deed(0); h.registrationDate = 0; h.value = 0; h.highestBid = 0; } /** * @dev Accepts a transfer from a previous registrar; stubbed out here since there * is no previous registrar implementing this interface. * * @param hash The sha3 hash of the label to transfer. * @param deed The Deed object for the name being transferred in. * @param registrationDate The date at which the name was originally registered. */ function acceptRegistrarTransfer(bytes32 hash, Deed deed, uint registrationDate) external { hash; deed; registrationDate; // Don't warn about unused variables } function entries(bytes32 _hash) external view returns (Mode, address, uint, uint, uint) { Entry storage h = _entries[_hash]; return (state(_hash), address(h.deed), h.registrationDate, h.value, h.highestBid); } // State transitions for names: // Open -> Auction (startAuction) // Auction -> Reveal // Reveal -> Owned // Reveal -> Open (if nobody bid) // Owned -> Open (releaseDeed or invalidateName) function state(bytes32 _hash) public view returns (Mode) { Entry storage entry = _entries[_hash]; if (!isAllowed(_hash, now)) { return Mode.NotYetAvailable; } else if (now < entry.registrationDate) { if (now < entry.registrationDate - revealPeriod) { return Mode.Auction; } else { return Mode.Reveal; } } else { if (entry.highestBid == 0) { return Mode.Open; } else { return Mode.Owned; } } } /** * @dev Determines if a name is available for registration yet * * Each name will be assigned a random date in which its auction * can be started, from 0 to 8 weeks * * @param _hash The hash to start an auction on * @param _timestamp The timestamp to query about */ function isAllowed(bytes32 _hash, uint _timestamp) public view returns (bool allowed) { return _timestamp > getAllowedTime(_hash); } /** * @dev Returns available date for hash * * The available time from the `registryStarted` for a hash is proportional * to its numeric value. * * @param _hash The hash to start an auction on */ function getAllowedTime(bytes32 _hash) public view returns (uint) { return registryStarted + ((launchLength * (uint(_hash) >> 128)) >> 128); // Right shift operator: a >> b == a / 2**b } /** * @dev Hash the values required for a secret bid * * @param hash The node corresponding to the desired namehash * @param value The bid amount * @param salt A random value to ensure secrecy of the bid * @return The hash of the bid values */ function shaBid(bytes32 hash, address owner, uint value, bytes32 salt) public pure returns (bytes32) { return keccak256(abi.encodePacked(hash, owner, value, salt)); } function _tryEraseSingleNode(bytes32 label) internal { if (ens.owner(rootNode) == address(this)) { ens.setSubnodeOwner(rootNode, label, address(this)); bytes32 node = keccak256(abi.encodePacked(rootNode, label)); ens.setResolver(node, address(0x0)); ens.setOwner(node, address(0x0)); } } function _startAuction(bytes32 _hash) internal registryOpen() { Mode mode = state(_hash); if (mode == Mode.Auction) return; require(mode == Mode.Open); Entry storage newAuction = _entries[_hash]; newAuction.registrationDate = now + totalAuctionLength; newAuction.value = 0; newAuction.highestBid = 0; emit AuctionStarted(_hash, newAuction.registrationDate); } function _startAuctions(bytes32[] memory _hashes) internal { for (uint i = 0; i < _hashes.length; i ++) { _startAuction(_hashes[i]); } } function _newBid(bytes32 sealedBid) internal { require(address(sealedBids[msg.sender][sealedBid]) == address(0x0)); require(msg.value >= minPrice); // Creates a new hash contract with the owner Deed bid = (new DeedImplementation).value(msg.value)(msg.sender); sealedBids[msg.sender][sealedBid] = bid; emit NewBid(sealedBid, msg.sender, msg.value); } function _eraseNodeHierarchy(uint idx, bytes32[] memory labels, bytes32 node) internal { // Take ownership of the node ens.setSubnodeOwner(node, labels[idx], address(this)); node = keccak256(abi.encodePacked(node, labels[idx])); // Recurse if there are more labels if (idx > 0) { _eraseNodeHierarchy(idx - 1, labels, node); } // Erase the resolver and owner records ens.setResolver(node, address(0x0)); ens.setOwner(node, address(0x0)); } /** * @dev Assign the owner in ENS, if we're still the registrar * * @param _hash hash to change owner * @param _newOwner new owner to transfer to */ function trySetSubnodeOwner(bytes32 _hash, address _newOwner) internal { if (ens.owner(rootNode) == address(this)) ens.setSubnodeOwner(rootNode, _hash, _newOwner); } /** * @dev Returns the maximum of two unsigned integers * * @param a A number to compare * @param b A number to compare * @return The maximum of two unsigned integers */ function max(uint a, uint b) internal pure returns (uint) { if (a > b) return a; else return b; } /** * @dev Returns the minimum of two unsigned integers * * @param a A number to compare * @param b A number to compare * @return The minimum of two unsigned integers */ function min(uint a, uint b) internal pure returns (uint) { if (a < b) return a; else return b; } /** * @dev Returns the length of a given string * * @param s The string to measure the length of * @return The length of the input string */ function strlen(string memory s) internal pure returns (uint) { s; // Don't warn about unused variables // Starting here means the LSB will be the byte we care about uint ptr; uint end; assembly { ptr := add(s, 1) end := add(mload(s), ptr) } uint len = 0; for (len; ptr < end; len++) { uint8 b; assembly { b := and(mload(ptr), 0xFF) } if (b < 0x80) { ptr += 1; } else if (b < 0xE0) { ptr += 2; } else if (b < 0xF0) { ptr += 3; } else if (b < 0xF8) { ptr += 4; } else if (b < 0xFC) { ptr += 5; } else { ptr += 6; } } return len; } } // File: openzeppelin-solidity/contracts/introspection/IERC165.sol pragma solidity ^0.5.0; /** * @title IERC165 * @dev https://github.com/ethereum/EIPs/blob/master/EIPS/eip-165.md */ interface IERC165 { /** * @notice Query if a contract implements an interface * @param interfaceId The interface identifier, as specified in ERC-165 * @dev Interface identification is specified in ERC-165. This function * uses less than 30,000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); } // File: openzeppelin-solidity/contracts/token/ERC721/IERC721.sol pragma solidity ^0.5.0; /** * @title ERC721 Non-Fungible Token Standard basic interface * @dev see https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md */ 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); function balanceOf(address owner) public view returns (uint256 balance); function ownerOf(uint256 tokenId) public view returns (address owner); 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 transferFrom(address from, address to, uint256 tokenId) public; function safeTransferFrom(address from, address to, uint256 tokenId) public; function safeTransferFrom(address from, address to, uint256 tokenId, bytes memory data) public; } // File: openzeppelin-solidity/contracts/token/ERC721/IERC721Receiver.sol pragma solidity ^0.5.0; /** * @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(keccak256("onERC721Received(address,address,uint256,bytes)"))` */ function onERC721Received(address operator, address from, uint256 tokenId, bytes memory data) public returns (bytes4); } // File: openzeppelin-solidity/contracts/math/SafeMath.sol pragma solidity ^0.5.0; /** * @title SafeMath * @dev Unsigned math operations with safety checks that revert on error */ library SafeMath { /** * @dev Multiplies two unsigned integers, reverts on 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-solidity/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b); return c; } /** * @dev Integer division of two unsigned integers truncating the quotient, reverts on division by zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { // Solidity only automatically asserts when dividing by 0 require(b > 0); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Subtracts two unsigned integers, reverts on overflow (i.e. if subtrahend is greater than minuend). */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { require(b <= a); uint256 c = a - b; return c; } /** * @dev Adds two unsigned integers, reverts on overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a); return c; } /** * @dev Divides two unsigned integers and returns the remainder (unsigned integer modulo), * reverts when dividing by zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { require(b != 0); return a % b; } } // File: openzeppelin-solidity/contracts/utils/Address.sol pragma solidity ^0.5.0; /** * Utility library of inline functions on addresses */ library Address { /** * Returns whether the target address is a contract * @dev This function will return false if invoked during the constructor of a contract, * as the code is not actually created until after the constructor finishes. * @param account address of the account to check * @return whether the target address is a contract */ function isContract(address account) internal view returns (bool) { uint256 size; // XXX Currently there is no better way to check if there is a contract in an address // than to check the size of the code at that address. // See https://ethereum.stackexchange.com/a/14016/36603 // for more details about how this works. // TODO Check this again before the Serenity release, because all addresses will be // contracts then. // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(account) } return size > 0; } } // File: openzeppelin-solidity/contracts/introspection/ERC165.sol pragma solidity ^0.5.0; /** * @title ERC165 * @author Matt Condon (@shrugs) * @dev Implements ERC165 using a lookup table. */ contract ERC165 is IERC165 { bytes4 private constant _INTERFACE_ID_ERC165 = 0x01ffc9a7; /** * 0x01ffc9a7 === * bytes4(keccak256('supportsInterface(bytes4)')) */ /** * @dev a mapping of interface id to whether or not it's supported */ mapping(bytes4 => bool) private _supportedInterfaces; /** * @dev A contract implementing SupportsInterfaceWithLookup * implement ERC165 itself */ constructor () internal { _registerInterface(_INTERFACE_ID_ERC165); } /** * @dev implement supportsInterface(bytes4) using a lookup table */ function supportsInterface(bytes4 interfaceId) external view returns (bool) { return _supportedInterfaces[interfaceId]; } /** * @dev internal method for registering an interface */ function _registerInterface(bytes4 interfaceId) internal { require(interfaceId != 0xffffffff); _supportedInterfaces[interfaceId] = true; } } // File: openzeppelin-solidity/contracts/token/ERC721/ERC721.sol pragma solidity ^0.5.0; /** * @title ERC721 Non-Fungible Token Standard basic implementation * @dev see https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md */ contract ERC721 is ERC165, IERC721 { using SafeMath for uint256; using Address for address; // 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 => uint256) private _ownedTokensCount; // Mapping from owner to operator approvals mapping (address => mapping (address => bool)) private _operatorApprovals; bytes4 private constant _INTERFACE_ID_ERC721 = 0x80ac58cd; /* * 0x80ac58cd === * bytes4(keccak256('balanceOf(address)')) ^ * bytes4(keccak256('ownerOf(uint256)')) ^ * bytes4(keccak256('approve(address,uint256)')) ^ * bytes4(keccak256('getApproved(uint256)')) ^ * bytes4(keccak256('setApprovalForAll(address,bool)')) ^ * bytes4(keccak256('isApprovedForAll(address,address)')) ^ * bytes4(keccak256('transferFrom(address,address,uint256)')) ^ * bytes4(keccak256('safeTransferFrom(address,address,uint256)')) ^ * bytes4(keccak256('safeTransferFrom(address,address,uint256,bytes)')) */ 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)); return _ownedTokensCount[owner]; } /** * @dev Gets the owner of the specified token ID * @param tokenId uint256 ID of the token to query the owner of * @return owner 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)); 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); require(msg.sender == owner || isApprovedForAll(owner, msg.sender)); _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)); 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); _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 { require(_isApprovedOrOwner(msg.sender, tokenId)); _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)); } /** * @dev Returns whether the specified token exists * @param tokenId uint256 ID of the token to query the existence of * @return 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) { 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)); require(!_exists(tokenId)); _tokenOwner[tokenId] = to; _ownedTokensCount[to] = _ownedTokensCount[to].add(1); 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); _clearApproval(tokenId); _ownedTokensCount[owner] = _ownedTokensCount[owner].sub(1); _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); require(to != address(0)); _clearApproval(tokenId); _ownedTokensCount[from] = _ownedTokensCount[from].sub(1); _ownedTokensCount[to] = _ownedTokensCount[to].add(1); _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 * @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 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); } } } // File: openzeppelin-solidity/contracts/ownership/Ownable.sol pragma solidity ^0.5.0; /** * @title Ownable * @dev The Ownable contract has an owner address, and provides basic authorization control * functions, this simplifies the implementation of "user permissions". */ contract Ownable { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev The Ownable constructor sets the original `owner` of the contract to the sender * account. */ constructor () internal { _owner = msg.sender; emit OwnershipTransferred(address(0), _owner); } /** * @return the address of the owner. */ function owner() public view returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(isOwner()); _; } /** * @return true if `msg.sender` is the owner of the contract. */ function isOwner() public view returns (bool) { return msg.sender == _owner; } /** * @dev Allows the current owner to relinquish control of the contract. * @notice Renouncing to ownership will leave the contract without an owner. * It will not be possible to call the functions with the `onlyOwner` * modifier anymore. */ function renounceOwnership() public onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Allows the current owner to transfer control of the contract to a newOwner. * @param newOwner The address to transfer ownership to. */ function transferOwnership(address newOwner) public onlyOwner { _transferOwnership(newOwner); } /** * @dev Transfers control of the contract to a newOwner. * @param newOwner The address to transfer ownership to. */ function _transferOwnership(address newOwner) internal { require(newOwner != address(0)); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } // File: contracts/BaseRegistrar.sol pragma solidity >=0.4.24; contract BaseRegistrar is ERC721, Ownable { uint constant public GRACE_PERIOD = 30 days; event ControllerAdded(address indexed controller); event ControllerRemoved(address indexed controller); event NameMigrated(uint256 indexed id, address indexed owner, uint expires); event NameRegistered(uint256 indexed id, address indexed owner, uint expires); event NameRenewed(uint256 indexed id, uint expires); // Expiration timestamp for migrated domains. uint public transferPeriodEnds; // The ENS registry ENS public ens; // The namehash of the TLD this registrar owns (eg, .eth) bytes32 public baseNode; // The interim registrar HashRegistrar public previousRegistrar; // A map of addresses that are authorised to register and renew names. mapping(address=>bool) public controllers; // Authorises a controller, who can register and renew domains. function addController(address controller) external; // Revoke controller permission for an address. function removeController(address controller) external; // Returns the expiration timestamp of the specified label hash. function nameExpires(uint256 id) external view returns(uint); // Returns true iff the specified name is available for registration. function available(uint256 id) public view returns(bool); /** * @dev Register a name. */ function register(uint256 id, address owner, uint duration) external returns(uint); function renew(uint256 id, uint duration) external returns(uint); /** * @dev Reclaim ownership of a name in ENS, if you own it in the registrar. */ function reclaim(uint256 id) external; /** * @dev Transfers a registration from the initial registrar. * This function is called by the initial registrar when a user calls `transferRegistrars`. */ function acceptRegistrarTransfer(bytes32 label, Deed deed, uint) external; } // File: contracts/StringUtils.sol pragma solidity >=0.4.24; library StringUtils { /** * @dev Returns the length of a given string * * @param s The string to measure the length of * @return The length of the input string */ function strlen(string memory s) internal pure returns (uint) { s; // Don't warn about unused variables // Starting here means the LSB will be the byte we care about uint ptr; uint end; assembly { ptr := add(s, 1) end := add(mload(s), ptr) } uint len; for (len = 0; ptr < end; len++) { uint8 b; assembly { b := and(mload(ptr), 0xFF) } if (b < 0x80) { ptr += 1; } else if (b < 0xE0) { ptr += 2; } else if (b < 0xF0) { ptr += 3; } else if (b < 0xF8) { ptr += 4; } else if (b < 0xFC) { ptr += 5; } else { ptr += 6; } } return len; } } // File: contracts/ETHRegistrarController.sol pragma solidity ^0.5.0; /** * @dev A registrar controller for registering and renewing names at fixed cost. */ contract ETHRegistrarController is Ownable { using StringUtils for *; uint constant public MIN_COMMITMENT_AGE = 1 hours; uint constant public MAX_COMMITMENT_AGE = 48 hours; uint constant public MIN_REGISTRATION_DURATION = 28 days; BaseRegistrar base; PriceOracle prices; mapping(bytes32=>uint) public commitments; event NameRegistered(string name, address indexed owner, uint cost, uint expires); event NameRenewed(string name, uint cost, uint expires); event NewPriceOracle(address indexed oracle); constructor(BaseRegistrar _base, PriceOracle _prices) public { base = _base; prices = _prices; } function rentPrice(string memory name, uint duration) view public returns(uint) { bytes32 hash = keccak256(bytes(name)); return prices.price(name, base.nameExpires(uint256(hash)), duration); } function valid(string memory name) public view returns(bool) { return name.strlen() > 6; } function available(string memory name) public view returns(bool) { bytes32 label = keccak256(bytes(name)); return valid(name) && base.available(uint256(label)); } function makeCommitment(string memory name, bytes32 secret) pure public returns(bytes32) { bytes32 label = keccak256(bytes(name)); return keccak256(abi.encodePacked(label, secret)); } function commit(bytes32 commitment) public { require(commitments[commitment] + MAX_COMMITMENT_AGE < now); commitments[commitment] = now; } function register(string calldata name, address owner, uint duration, bytes32 secret) external payable { // Require a valid commitment bytes32 commitment = makeCommitment(name, secret); require(commitments[commitment] + MIN_COMMITMENT_AGE <= now); // If the commitment is too old, or the name is registered, stop if(commitments[commitment] + MAX_COMMITMENT_AGE < now || !available(name)) { msg.sender.transfer(msg.value); return; } delete(commitments[commitment]); uint cost = rentPrice(name, duration); require(duration >= MIN_REGISTRATION_DURATION); require(msg.value >= cost); bytes32 label = keccak256(bytes(name)); uint expires = base.register(uint256(label), owner, duration); emit NameRegistered(name, owner, cost, expires); if(msg.value > cost) { msg.sender.transfer(msg.value - cost); } } function renew(string calldata name, uint duration) external payable { uint cost = rentPrice(name, duration); require(msg.value >= cost); bytes32 label = keccak256(bytes(name)); uint expires = base.renew(uint256(label), duration); if(msg.value > cost) { msg.sender.transfer(msg.value - cost); } emit NameRenewed(name, cost, expires); } function setPriceOracle(PriceOracle _prices) public onlyOwner { prices = _prices; emit NewPriceOracle(address(prices)); } function withdraw() public onlyOwner { msg.sender.transfer(address(this).balance); } }