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0x0bf4e3c495435984a78e6e0767ab919e1e6e50d268889ea6be5787d37fe1454b | Register With Co... | (pending) | 4 days ago | IN | 0 ETH | (Pending) | |||
Renew | 19496971 | 4 days ago | IN | 0 ETH | 0.00166156 | ||||
Renew | 19496971 | 4 days ago | IN | 0 ETH | 0.00166156 | ||||
Renew | 19496971 | 4 days ago | IN | 0 ETH | 0.00166156 | ||||
Renew | 19496971 | 4 days ago | IN | 0 ETH | 0.00166156 | ||||
Renew | 19496971 | 4 days ago | IN | 0 ETH | 0.00166156 | ||||
Renew | 19496971 | 4 days ago | IN | 0 ETH | 0.00166156 | ||||
Renew | 19496971 | 4 days ago | IN | 0 ETH | 0.00166156 | ||||
Renew | 19496971 | 4 days ago | IN | 0 ETH | 0.00166156 | ||||
Renew | 19496971 | 4 days ago | IN | 0 ETH | 0.00166156 | ||||
Renew | 19496971 | 4 days ago | IN | 0 ETH | 0.00166156 | ||||
Renew | 19496966 | 4 days ago | IN | 0 ETH | 0.00166156 | ||||
Renew | 19496966 | 4 days ago | IN | 0 ETH | 0.00166156 | ||||
Renew | 19496966 | 4 days ago | IN | 0 ETH | 0.00166156 | ||||
Renew | 19496966 | 4 days ago | IN | 0 ETH | 0.00166156 | ||||
Renew | 19496966 | 4 days ago | IN | 0 ETH | 0.00166156 | ||||
Renew | 19496966 | 4 days ago | IN | 0 ETH | 0.00166156 | ||||
Renew | 19496966 | 4 days ago | IN | 0 ETH | 0.00166156 | ||||
Renew | 19496966 | 4 days ago | IN | 0 ETH | 0.00166156 | ||||
Renew | 19496966 | 4 days ago | IN | 0 ETH | 0.00166156 | ||||
Renew | 19496966 | 4 days ago | IN | 0 ETH | 0.00166156 | ||||
Renew | 19496966 | 4 days ago | IN | 0 ETH | 0.00166156 | ||||
Renew | 19496966 | 4 days ago | IN | 0 ETH | 0.00166156 | ||||
Renew | 19496966 | 4 days ago | IN | 0 ETH | 0.00166156 | ||||
Renew | 19496966 | 4 days ago | IN | 0 ETH | 0.00166156 |
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Contract Name:
RegistrarController
Compiler Version
v0.8.4+commit.c7e474f2
Optimization Enabled:
Yes with 500 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
pragma solidity >=0.8.4; import "@openzeppelin/contracts/access/Ownable.sol"; import "@openzeppelin/contracts/utils/cryptography/MerkleProof.sol"; import "./NameState.sol"; import "./StringUtils.sol"; import "./PriceOracle.sol"; import "./INameValidator.sol"; import "./BaseRegistrarImplementation.sol"; import "../resolvers/Resolver.sol"; /** * @dev A registrar controller for registering and renewing names at fixed cost. */ contract RegistrarController is Ownable { using StringUtils for *; uint256 public constant MIN_REGISTRATION_DURATION = 365 days; bytes4 private constant INTERFACE_META_ID = bytes4(keccak256("supportsInterface(bytes4)")); bytes4 private constant COMMITMENT_CONTROLLER_ID = bytes4( keccak256("rentPrice(string,uint256)") ^ keccak256("available(string)") ^ keccak256("makeCommitment(string,address,bytes32)") ^ keccak256("commit(bytes32)") ^ keccak256("register(string,address,uint256,bytes32)") ^ keccak256("renew(string,uint256)") ); bytes4 private constant COMMITMENT_WITH_CONFIG_CONTROLLER_ID = bytes4( keccak256( "registerWithConfig(string,address,uint256,bytes32,address,address)" ) ^ keccak256( "makeCommitmentWithConfig(string,address,bytes32,address,address)" ) ^ keccak256( "registerWithWhitelist(string,address,uint256,bytes32,address,address,bytes32[])" ) ); BaseRegistrarImplementation base; PriceOracle prices; INameValidator nameValidator; uint256 public minCommitmentAge; uint256 public maxCommitmentAge; bool public isNameValidation; bool public isPublicMint; bool public isMintStarted; bool public isWhitelistOn; mapping(uint256 => bool) public isReserve; mapping(uint256 => bool) public isWhitelist; bytes32 public root; mapping(bytes32 => uint256) public commitments; event NameRegistered( string name, bytes32 indexed label, address indexed owner, uint256 tokenId, uint256 createdAt, uint256 cost, uint256 expires ); event NameRenewed( string name, bytes32 indexed label, uint256 cost, uint256 expires ); event NewPriceOracle(address indexed oracle); event NewNameValidator(address indexed validator); event ModifyMerkleRoot(bytes32 newRoot); event IsPublicMint(bool enableOrNot); event IsNameValidation(bool enableOrNot); event IsWhitelistOn(bool enableOrNot); event IsMintStarted(bool enableOrNot); event ReservationName(string name, bool enableOrNot); event WhitelistName(string name, bool enableOrNot); constructor( BaseRegistrarImplementation _base, PriceOracle _prices, INameValidator _nameValidator, uint256 _minCommitmentAge, uint256 _maxCommitmentAge ) public { require(_maxCommitmentAge > _minCommitmentAge); base = _base; prices = _prices; nameValidator = _nameValidator; minCommitmentAge = _minCommitmentAge; maxCommitmentAge = _maxCommitmentAge; isNameValidation = true; isPublicMint = false; isMintStarted = false; isWhitelistOn = true; } function nameState(string memory name) external view returns (NameState.State state) { if (!valid(name)) return NameState.State.INVALID_NAME; uint256 labelhash = uint256(keccak256(bytes(name))); if (!base.available(labelhash)) return NameState.State.NOT_AVAILABLE_NAME; if (isWhitelistOn && isWhitelist[labelhash]) return NameState.State.WHITELIST_NAME; if (isReserve[labelhash]) return NameState.State.RESERVATION_NAME; if (!isPublicMint && name.strlen() <= 3) return NameState.State.NOT_AVAILABLE_NAME; return NameState.State.AVAILABLE_NAME; } function rentPrice(string memory name, uint256 duration) public view returns (uint256) { bytes32 hash = keccak256(bytes(name)); return prices.price(name, base.nameExpires(uint256(hash)), duration); } function valid(string memory name) public view returns (bool) { if (isNameValidation) { return nameValidator.valid(name); } else { return name.strlen() >= 1; } } 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, address owner, bytes32 secret ) public pure returns (bytes32) { return makeCommitmentWithConfig( name, owner, secret, address(0), address(0) ); } function makeCommitmentWithConfig( string memory name, address owner, bytes32 secret, address resolver, address addr ) public pure returns (bytes32) { bytes32 label = keccak256(bytes(name)); if (resolver == address(0) && addr == address(0)) { return keccak256(abi.encodePacked(label, owner, secret)); } require(resolver != address(0)); return keccak256(abi.encodePacked(label, owner, resolver, addr, secret)); } function commit(bytes32 commitment) public { require(commitments[commitment] + maxCommitmentAge < block.timestamp); commitments[commitment] = block.timestamp; } function registerWithWhitelist( string memory name, address owner, uint256 duration, bytes32 secret, address resolver, address addr, bytes32[] calldata proof ) external payable { bytes32 node = keccak256(abi.encodePacked(msg.sender, name)); require(MerkleProof.verify(proof, root, node), "merkle"); _registerWithConfig(name, owner, duration, secret, resolver, addr); } function registerWithAdmin( string memory name, address owner, uint256 duration, bytes32 secret, address resolver, address addr ) external onlyOwner { _registerWithConfig(name, owner, duration, secret, resolver, addr); } function register( string calldata name, address owner, uint256 duration, bytes32 secret ) external payable { require(isMintStarted, "not start"); if (name.strlen() <= 3) { require(isPublicMint, "public"); } uint256 labelhash = uint256(keccak256(bytes(name))); if (isWhitelistOn) { require(!isWhitelist[labelhash], "whitelist"); } require(!isReserve[labelhash], "reserve"); _registerWithConfig( name, owner, duration, secret, address(0), address(0) ); } function registerWithConfig( string memory name, address owner, uint256 duration, bytes32 secret, address resolver, address addr ) public payable { require(isMintStarted, "not start"); if (name.strlen() <= 3) { require(isPublicMint, "public"); } uint256 labelhash = uint256(keccak256(bytes(name))); if (isWhitelistOn) { require(!isWhitelist[labelhash], "whitelist"); } require(!isReserve[labelhash], "reserve"); _registerWithConfig(name, owner, duration, secret, resolver, addr); } function _registerWithConfig( string memory name, address owner, uint256 duration, bytes32 secret, address resolver, address addr ) internal { bytes32 commitment = makeCommitmentWithConfig( name, owner, secret, resolver, addr ); uint256 cost = _consumeCommitment(name, duration, commitment); bytes32 label = keccak256(bytes(name)); uint256 tokenId = uint256(label); uint256 expires; if (resolver != address(0)) { // Set this contract as the (temporary) owner, giving it // permission to set up the resolver. expires = base.register(tokenId, address(this), duration); // The nodehash of this label bytes32 nodehash = keccak256( abi.encodePacked(base.baseNode(), label) ); // Set the resolver base.bns().setResolver(nodehash, resolver); // Configure the resolver if (addr != address(0)) { Resolver(resolver).setAddr(nodehash, addr); } // Now transfer full ownership to the expeceted owner base.reclaim(tokenId, owner); base.transferFrom(address(this), owner, tokenId); } else { require(addr == address(0)); expires = base.register(tokenId, owner, duration); } emit NameRegistered( name, label, owner, tokenId, block.timestamp, cost, expires ); // Refund any extra payment if (msg.value > cost) { payable(msg.sender).transfer(msg.value - cost); } } function renew(string calldata name, uint256 duration) external payable { uint256 cost = rentPrice(name, duration); require(msg.value >= cost); require(duration == MIN_REGISTRATION_DURATION); bytes32 label = keccak256(bytes(name)); uint256 expires = base.renew(uint256(label), duration); if (msg.value > cost) { payable(msg.sender).transfer(msg.value - cost); } emit NameRenewed(name, label, cost, expires); } function setPriceOracle(PriceOracle _prices) public onlyOwner { prices = _prices; emit NewPriceOracle(address(prices)); } function setCommitmentAges( uint256 _minCommitmentAge, uint256 _maxCommitmentAge ) public onlyOwner { minCommitmentAge = _minCommitmentAge; maxCommitmentAge = _maxCommitmentAge; } function setMerkleRoot(bytes32 _root) public onlyOwner { root = _root; emit ModifyMerkleRoot(_root); } function setIsPublicMintOpen(bool enableOrNot) public onlyOwner { isPublicMint = enableOrNot; emit IsPublicMint(isWhitelistOn); } function setNameValidation(bool enableOrNot) public onlyOwner { isNameValidation = enableOrNot; emit IsNameValidation(isWhitelistOn); } function setIsWhitelistOn(bool enableOrNot) public onlyOwner { isWhitelistOn = enableOrNot; emit IsWhitelistOn(isWhitelistOn); } function setIsMintStarted(bool enableOrNot) public onlyOwner { isMintStarted = enableOrNot; emit IsMintStarted(isMintStarted); } function changeNameValidation(INameValidator _validator) external onlyOwner { nameValidator = _validator; emit NewNameValidator(address(nameValidator)); } function setReservationNames( string[] calldata names, bool[] calldata enableOrNots ) public onlyOwner { require(names.length == enableOrNots.length, "length"); for (uint256 idx = 0; idx < names.length; idx++) { isReserve[uint256(keccak256(bytes(names[idx])))] = enableOrNots[ idx ]; emit ReservationName(names[idx], enableOrNots[idx]); } } function setWhitelistNames( string[] calldata names, bool[] calldata enableOrNots ) public onlyOwner { require(names.length == enableOrNots.length, "length"); for (uint256 idx = 0; idx < names.length; idx++) { isWhitelist[uint256(keccak256(bytes(names[idx])))] = enableOrNots[ idx ]; emit WhitelistName(names[idx], enableOrNots[idx]); } } function withdraw() public onlyOwner { payable(msg.sender).transfer(address(this).balance); } function supportsInterface(bytes4 interfaceID) external pure returns (bool) { return interfaceID == INTERFACE_META_ID || interfaceID == COMMITMENT_CONTROLLER_ID || interfaceID == COMMITMENT_WITH_CONFIG_CONTROLLER_ID; } function _consumeCommitment( string memory name, uint256 duration, bytes32 commitment ) internal returns (uint256) { // Require a valid commitment require(commitments[commitment] + minCommitmentAge <= block.timestamp); // If the commitment is too old, or the name is registered, stop require(commitments[commitment] + maxCommitmentAge > block.timestamp); require(available(name)); delete (commitments[commitment]); uint256 cost = rentPrice(name, duration); require(duration == MIN_REGISTRATION_DURATION); require(msg.value >= cost); return cost; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (access/Ownable.sol) pragma solidity ^0.8.0; import "../utils/Context.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor() { _transferOwnership(_msgSender()); } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(owner() == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { _transferOwnership(address(0)); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); _transferOwnership(newOwner); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Internal function without access restriction. */ function _transferOwnership(address newOwner) internal virtual { address oldOwner = _owner; _owner = newOwner; emit OwnershipTransferred(oldOwner, newOwner); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (utils/cryptography/MerkleProof.sol) pragma solidity ^0.8.0; /** * @dev These functions deal with verification of Merkle Trees proofs. * * The proofs can be generated using the JavaScript library * https://github.com/miguelmota/merkletreejs[merkletreejs]. * Note: the hashing algorithm should be keccak256 and pair sorting should be enabled. * * See `test/utils/cryptography/MerkleProof.test.js` for some examples. * * WARNING: You should avoid using leaf values that are 64 bytes long prior to * hashing, or use a hash function other than keccak256 for hashing leaves. * This is because the concatenation of a sorted pair of internal nodes in * the merkle tree could be reinterpreted as a leaf value. */ library MerkleProof { /** * @dev Returns true if a `leaf` can be proved to be a part of a Merkle tree * defined by `root`. For this, a `proof` must be provided, containing * sibling hashes on the branch from the leaf to the root of the tree. Each * pair of leaves and each pair of pre-images are assumed to be sorted. */ function verify( bytes32[] memory proof, bytes32 root, bytes32 leaf ) internal pure returns (bool) { return processProof(proof, leaf) == root; } /** * @dev Returns the rebuilt hash obtained by traversing a Merkle tree up * from `leaf` using `proof`. A `proof` is valid if and only if the rebuilt * hash matches the root of the tree. When processing the proof, the pairs * of leafs & pre-images are assumed to be sorted. * * _Available since v4.4._ */ function processProof(bytes32[] memory proof, bytes32 leaf) internal pure returns (bytes32) { bytes32 computedHash = leaf; for (uint256 i = 0; i < proof.length; i++) { bytes32 proofElement = proof[i]; if (computedHash <= proofElement) { // Hash(current computed hash + current element of the proof) computedHash = _efficientHash(computedHash, proofElement); } else { // Hash(current element of the proof + current computed hash) computedHash = _efficientHash(proofElement, computedHash); } } return computedHash; } function _efficientHash(bytes32 a, bytes32 b) private pure returns (bytes32 value) { assembly { mstore(0x00, a) mstore(0x20, b) value := keccak256(0x00, 0x40) } } }
pragma solidity >=0.8.4; library NameState { enum State { UNKNOWN, INVALID_NAME, WHITELIST_NAME, RESERVATION_NAME, NOT_AVAILABLE_NAME, AVAILABLE_NAME } }
pragma solidity >=0.8.4; 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 (uint256) { uint256 len; uint256 i = 0; uint256 bytelength = bytes(s).length; for (len = 0; i < bytelength; len++) { bytes1 b = bytes(s)[i]; if (b < 0x80) { i += 1; } else if (b < 0xE0) { i += 2; } else if (b < 0xF0) { i += 3; } else if (b < 0xF8) { i += 4; } else if (b < 0xFC) { i += 5; } else { i += 6; } } return len; } }
pragma solidity >=0.8.4; 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, uint256 expires, uint256 duration ) external view returns (uint256); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.4; interface INameValidator { function valid(string calldata name) external view returns (bool); }
pragma solidity >=0.8.4; import "../registry/BNS.sol"; import "@openzeppelin/contracts/token/ERC721/ERC721.sol"; import "./BaseRegistrar.sol"; contract BaseRegistrarImplementation is ERC721, BaseRegistrar { // A map of expiry times mapping(uint256 => uint256) expiries; // baseURI string public baseTokenURI; bytes4 private constant INTERFACE_META_ID = bytes4(keccak256("supportsInterface(bytes4)")); bytes4 private constant ERC721_ID = bytes4( keccak256("balanceOf(address)") ^ keccak256("ownerOf(uint256)") ^ keccak256("approve(address,uint256)") ^ keccak256("getApproved(uint256)") ^ keccak256("setApprovalForAll(address,bool)") ^ keccak256("isApprovedForAll(address,address)") ^ keccak256("transferFrom(address,address,uint256)") ^ keccak256("safeTransferFrom(address,address,uint256)") ^ keccak256("safeTransferFrom(address,address,uint256,bytes)") ^ keccak256("tokenURI(uint256)") ); bytes4 private constant RECLAIM_ID = bytes4(keccak256("reclaim(uint256,address)")); /** * v2.1.3 version of _isApprovedOrOwner which calls ownerOf(tokenId) and takes grace period into consideration instead of ERC721.ownerOf(tokenId); * https://github.com/OpenZeppelin/openzeppelin-contracts/blob/v2.1.3/contracts/token/ERC721/ERC721.sol#L187 * @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 override returns (bool) { address owner = ownerOf(tokenId); return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender)); } constructor(BNS _bns, bytes32 _baseNode) ERC721("", "") { bns = _bns; baseNode = _baseNode; baseTokenURI = ""; } modifier live() { require(bns.owner(baseNode) == address(this)); _; } modifier onlyController() { require(controllers[msg.sender]); _; } /** * @dev Gets the owner of the specified token ID. Names become unowned * when their registration expiries. * @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 override(IERC721, ERC721) returns (address) { require(expiries[tokenId] > block.timestamp); return super.ownerOf(tokenId); } // Authorises a controller, who can register and renew domains. function addController(address controller) external override onlyOwner { controllers[controller] = true; emit ControllerAdded(controller); } // Revoke controller permission for an address. function removeController(address controller) external override onlyOwner { controllers[controller] = false; emit ControllerRemoved(controller); } // setBaseURI function setBaseTokenURI(string memory _baseTokenURI) external onlyOwner { baseTokenURI = _baseTokenURI; } function _baseURI() internal view virtual override(ERC721) returns (string memory) { return baseTokenURI; } // Set the resolver for the TLD this registrar manages. function setResolver(address resolver) external override onlyOwner { bns.setResolver(baseNode, resolver); } // Returns the expiration timestamp of the specified id. function nameExpires(uint256 id) external view override returns (uint256) { return expiries[id]; } // Returns true iff the specified name is available for registration. function available(uint256 id) public view override returns (bool) { // Not available if it's registered here or in its grace period. return expiries[id] < block.timestamp; } /** * @dev Register a name. * @param id The token ID (keccak256 of the label). * @param owner The address that should own the registration. * @param duration Duration in seconds for the registration. */ function register( uint256 id, address owner, uint256 duration ) external override returns (uint256) { return _register(id, owner, duration, true); } /** * @dev Register a name, without modifying the registry. * @param id The token ID (keccak256 of the label). * @param owner The address that should own the registration. * @param duration Duration in seconds for the registration. */ function registerOnly( uint256 id, address owner, uint256 duration ) external returns (uint256) { return _register(id, owner, duration, false); } function _register( uint256 id, address owner, uint256 duration, bool updateRegistry ) internal live onlyController returns (uint256) { require(available(id)); expiries[id] = block.timestamp + duration; if (_exists(id)) { // Name was previously owned, and expired _burn(id); } _mint(owner, id); if (updateRegistry) { bns.setSubnodeOwner(baseNode, bytes32(id), owner); } emit NameRegistered(id, owner, block.timestamp + duration); return block.timestamp + duration; } function renew(uint256 id, uint256 duration) external override live onlyController returns (uint256) { require(expiries[id] < block.timestamp + RENEW_PERIOD, "renew period"); expiries[id] += duration; emit NameRenewed(id, expiries[id]); return expiries[id]; } /** * @dev Reclaim ownership of a name in BNS, if you own it in the registrar. */ function reclaim(uint256 id, address owner) external override live { require(_isApprovedOrOwner(msg.sender, id)); bns.setSubnodeOwner(baseNode, bytes32(id), owner); } function supportsInterface(bytes4 interfaceID) public view override(ERC721, IERC165) returns (bool) { return interfaceID == INTERFACE_META_ID || interfaceID == ERC721_ID || interfaceID == RECLAIM_ID || super.supportsInterface(interfaceID); } }
//SPDX-License-Identifier: MIT pragma solidity >=0.8.4; import "./profiles/IABIResolver.sol"; import "./profiles/IAddressResolver.sol"; import "./profiles/IAddrResolver.sol"; import "./profiles/IContentHashResolver.sol"; import "./profiles/IDNSRecordResolver.sol"; import "./profiles/IDNSZoneResolver.sol"; import "./profiles/IInterfaceResolver.sol"; import "./profiles/INameResolver.sol"; import "./profiles/IPubkeyResolver.sol"; import "./profiles/ITextResolver.sol"; import "./ISupportsInterface.sol"; /** * A generic resolver interface which includes all the functions including the ones deprecated */ interface Resolver is ISupportsInterface, IABIResolver, IAddressResolver, IAddrResolver, IContentHashResolver, IDNSRecordResolver, IDNSZoneResolver, IInterfaceResolver, INameResolver, IPubkeyResolver, ITextResolver { /* Deprecated events */ event ContentChanged(bytes32 indexed node, bytes32 hash); function setABI( bytes32 node, uint256 contentType, bytes calldata data ) external; function setAddr(bytes32 node, address addr) external; function setAddr( bytes32 node, uint256 coinType, bytes calldata a ) external; function setContenthash(bytes32 node, bytes calldata hash) external; function setDnsrr(bytes32 node, bytes calldata data) external; function setName(bytes32 node, string calldata _name) external; function setPubkey( bytes32 node, bytes32 x, bytes32 y ) external; function setText( bytes32 node, string calldata key, string calldata value ) external; function setInterface( bytes32 node, bytes4 interfaceID, address implementer ) external; function multicall(bytes[] calldata data) external returns (bytes[] memory results); /* Deprecated functions */ function content(bytes32 node) external view returns (bytes32); function multihash(bytes32 node) external view returns (bytes memory); function setContent(bytes32 node, bytes32 hash) external; function setMultihash(bytes32 node, bytes calldata hash) external; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } }
pragma solidity >=0.8.4; interface BNS { // 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 virtual; function setSubnodeRecord( bytes32 node, bytes32 label, address owner, address resolver, uint64 ttl ) external virtual; function setSubnodeOwner( bytes32 node, bytes32 label, address owner ) external virtual returns (bytes32); function setResolver(bytes32 node, address resolver) external virtual; function setOwner(bytes32 node, address owner) external virtual; function setTTL(bytes32 node, uint64 ttl) external virtual; function setApprovalForAll(address operator, bool approved) external virtual; function owner(bytes32 node) external view virtual returns (address); function resolver(bytes32 node) external view virtual returns (address); function ttl(bytes32 node) external view virtual returns (uint64); function recordExists(bytes32 node) external view virtual returns (bool); function isApprovedForAll(address owner, address operator) external view virtual returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/ERC721.sol) pragma solidity ^0.8.0; import "./IERC721.sol"; import "./IERC721Receiver.sol"; import "./extensions/IERC721Metadata.sol"; import "../../utils/Address.sol"; import "../../utils/Context.sol"; import "../../utils/Strings.sol"; import "../../utils/introspection/ERC165.sol"; /** * @dev Implementation of https://eips.ethereum.org/EIPS/eip-721[ERC721] Non-Fungible Token Standard, including * the Metadata extension, but not including the Enumerable extension, which is available separately as * {ERC721Enumerable}. */ contract ERC721 is Context, ERC165, IERC721, IERC721Metadata { using Address for address; using Strings for uint256; // Token name string private _name; // Token symbol string private _symbol; // Mapping from token ID to owner address mapping(uint256 => address) private _owners; // Mapping owner address to token count mapping(address => uint256) private _balances; // Mapping from token ID to approved address mapping(uint256 => address) private _tokenApprovals; // Mapping from owner to operator approvals mapping(address => mapping(address => bool)) private _operatorApprovals; /** * @dev Initializes the contract by setting a `name` and a `symbol` to the token collection. */ constructor(string memory name_, string memory symbol_) { _name = name_; _symbol = symbol_; } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) { return interfaceId == type(IERC721).interfaceId || interfaceId == type(IERC721Metadata).interfaceId || super.supportsInterface(interfaceId); } /** * @dev See {IERC721-balanceOf}. */ function balanceOf(address owner) public view virtual override returns (uint256) { require(owner != address(0), "ERC721: balance query for the zero address"); return _balances[owner]; } /** * @dev See {IERC721-ownerOf}. */ function ownerOf(uint256 tokenId) public view virtual override returns (address) { address owner = _owners[tokenId]; require(owner != address(0), "ERC721: owner query for nonexistent token"); return owner; } /** * @dev See {IERC721Metadata-name}. */ function name() public view virtual override returns (string memory) { return _name; } /** * @dev See {IERC721Metadata-symbol}. */ function symbol() public view virtual override returns (string memory) { return _symbol; } /** * @dev See {IERC721Metadata-tokenURI}. */ function tokenURI(uint256 tokenId) public view virtual override returns (string memory) { require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token"); string memory baseURI = _baseURI(); return bytes(baseURI).length > 0 ? string(abi.encodePacked(baseURI, tokenId.toString())) : ""; } /** * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each * token will be the concatenation of the `baseURI` and the `tokenId`. Empty * by default, can be overridden in child contracts. */ function _baseURI() internal view virtual returns (string memory) { return ""; } /** * @dev See {IERC721-approve}. */ function approve(address to, uint256 tokenId) public virtual override { address owner = ERC721.ownerOf(tokenId); require(to != owner, "ERC721: approval to current owner"); require( _msgSender() == owner || isApprovedForAll(owner, _msgSender()), "ERC721: approve caller is not owner nor approved for all" ); _approve(to, tokenId); } /** * @dev See {IERC721-getApproved}. */ function getApproved(uint256 tokenId) public view virtual override returns (address) { require(_exists(tokenId), "ERC721: approved query for nonexistent token"); return _tokenApprovals[tokenId]; } /** * @dev See {IERC721-setApprovalForAll}. */ function setApprovalForAll(address operator, bool approved) public virtual override { _setApprovalForAll(_msgSender(), operator, approved); } /** * @dev See {IERC721-isApprovedForAll}. */ function isApprovedForAll(address owner, address operator) public view virtual override returns (bool) { return _operatorApprovals[owner][operator]; } /** * @dev See {IERC721-transferFrom}. */ function transferFrom( address from, address to, uint256 tokenId ) public virtual override { //solhint-disable-next-line max-line-length require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved"); _transfer(from, to, tokenId); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId ) public virtual override { safeTransferFrom(from, to, tokenId, ""); } /** * @dev See {IERC721-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes memory _data ) public virtual override { require(_isApprovedOrOwner(_msgSender(), tokenId), "ERC721: transfer caller is not owner nor approved"); _safeTransfer(from, to, tokenId, _data); } /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * `_data` is additional data, it has no specified format and it is sent in call to `to`. * * This internal function is equivalent to {safeTransferFrom}, and can be used to e.g. * implement alternative mechanisms to perform token transfer, such as signature-based. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function _safeTransfer( address from, address to, uint256 tokenId, bytes memory _data ) internal virtual { _transfer(from, to, tokenId); require(_checkOnERC721Received(from, to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer"); } /** * @dev Returns whether `tokenId` exists. * * Tokens can be managed by their owner or approved accounts via {approve} or {setApprovalForAll}. * * Tokens start existing when they are minted (`_mint`), * and stop existing when they are burned (`_burn`). */ function _exists(uint256 tokenId) internal view virtual returns (bool) { return _owners[tokenId] != address(0); } /** * @dev Returns whether `spender` is allowed to manage `tokenId`. * * Requirements: * * - `tokenId` must exist. */ function _isApprovedOrOwner(address spender, uint256 tokenId) internal view virtual returns (bool) { require(_exists(tokenId), "ERC721: operator query for nonexistent token"); address owner = ERC721.ownerOf(tokenId); return (spender == owner || isApprovedForAll(owner, spender) || getApproved(tokenId) == spender); } /** * @dev Safely mints `tokenId` and transfers it to `to`. * * Requirements: * * - `tokenId` must not exist. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function _safeMint(address to, uint256 tokenId) internal virtual { _safeMint(to, tokenId, ""); } /** * @dev Same as {xref-ERC721-_safeMint-address-uint256-}[`_safeMint`], with an additional `data` parameter which is * forwarded in {IERC721Receiver-onERC721Received} to contract recipients. */ function _safeMint( address to, uint256 tokenId, bytes memory _data ) internal virtual { _mint(to, tokenId); require( _checkOnERC721Received(address(0), to, tokenId, _data), "ERC721: transfer to non ERC721Receiver implementer" ); } /** * @dev Mints `tokenId` and transfers it to `to`. * * WARNING: Usage of this method is discouraged, use {_safeMint} whenever possible * * Requirements: * * - `tokenId` must not exist. * - `to` cannot be the zero address. * * Emits a {Transfer} event. */ function _mint(address to, uint256 tokenId) internal virtual { require(to != address(0), "ERC721: mint to the zero address"); require(!_exists(tokenId), "ERC721: token already minted"); _beforeTokenTransfer(address(0), to, tokenId); _balances[to] += 1; _owners[tokenId] = to; emit Transfer(address(0), to, tokenId); _afterTokenTransfer(address(0), to, tokenId); } /** * @dev Destroys `tokenId`. * The approval is cleared when the token is burned. * * Requirements: * * - `tokenId` must exist. * * Emits a {Transfer} event. */ function _burn(uint256 tokenId) internal virtual { address owner = ERC721.ownerOf(tokenId); _beforeTokenTransfer(owner, address(0), tokenId); // Clear approvals _approve(address(0), tokenId); _balances[owner] -= 1; delete _owners[tokenId]; emit Transfer(owner, address(0), tokenId); _afterTokenTransfer(owner, address(0), tokenId); } /** * @dev Transfers `tokenId` from `from` to `to`. * As opposed to {transferFrom}, this imposes no restrictions on msg.sender. * * Requirements: * * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * * Emits a {Transfer} event. */ function _transfer( address from, address to, uint256 tokenId ) internal virtual { require(ERC721.ownerOf(tokenId) == from, "ERC721: transfer from incorrect owner"); require(to != address(0), "ERC721: transfer to the zero address"); _beforeTokenTransfer(from, to, tokenId); // Clear approvals from the previous owner _approve(address(0), tokenId); _balances[from] -= 1; _balances[to] += 1; _owners[tokenId] = to; emit Transfer(from, to, tokenId); _afterTokenTransfer(from, to, tokenId); } /** * @dev Approve `to` to operate on `tokenId` * * Emits a {Approval} event. */ function _approve(address to, uint256 tokenId) internal virtual { _tokenApprovals[tokenId] = to; emit Approval(ERC721.ownerOf(tokenId), to, tokenId); } /** * @dev Approve `operator` to operate on all of `owner` tokens * * Emits a {ApprovalForAll} event. */ function _setApprovalForAll( address owner, address operator, bool approved ) internal virtual { require(owner != operator, "ERC721: approve to caller"); _operatorApprovals[owner][operator] = approved; emit ApprovalForAll(owner, operator, approved); } /** * @dev Internal function to invoke {IERC721Receiver-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 bool whether the call correctly returned the expected magic value */ function _checkOnERC721Received( address from, address to, uint256 tokenId, bytes memory _data ) private returns (bool) { if (to.isContract()) { try IERC721Receiver(to).onERC721Received(_msgSender(), from, tokenId, _data) returns (bytes4 retval) { return retval == IERC721Receiver.onERC721Received.selector; } catch (bytes memory reason) { if (reason.length == 0) { revert("ERC721: transfer to non ERC721Receiver implementer"); } else { assembly { revert(add(32, reason), mload(reason)) } } } } else { return true; } } /** * @dev Hook that is called before any token transfer. This includes minting * and burning. * * Calling conditions: * * - When `from` and `to` are both non-zero, ``from``'s `tokenId` will be * transferred to `to`. * - When `from` is zero, `tokenId` will be minted for `to`. * - When `to` is zero, ``from``'s `tokenId` will be burned. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address from, address to, uint256 tokenId ) internal virtual {} /** * @dev Hook that is called after any transfer of tokens. This includes * minting and burning. * * Calling conditions: * * - when `from` and `to` are both non-zero. * - `from` and `to` are never both zero. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _afterTokenTransfer( address from, address to, uint256 tokenId ) internal virtual {} }
pragma solidity ^0.8.4; import "../registry/BNS.sol"; import "@openzeppelin/contracts/token/ERC721/IERC721.sol"; import "@openzeppelin/contracts/access/Ownable.sol"; abstract contract BaseRegistrar is Ownable, IERC721 { uint256 public constant GRACE_PERIOD = 0; // no protection period uint256 public constant RENEW_PERIOD = 180 days; event ControllerAdded(address indexed controller); event ControllerRemoved(address indexed controller); event NameMigrated( uint256 indexed id, address indexed owner, uint256 expires ); event NameRegistered( uint256 indexed id, address indexed owner, uint256 expires ); event NameRenewed(uint256 indexed id, uint256 expires); // The BNS registry BNS public bns; // The namehash of the TLD this registrar owns (eg, .eth) bytes32 public baseNode; // 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 virtual; // Revoke controller permission for an address. function removeController(address controller) external virtual; // Set the resolver for the TLD this registrar manages. function setResolver(address resolver) external virtual; // Returns the expiration timestamp of the specified label hash. function nameExpires(uint256 id) external view virtual returns (uint256); // Returns true iff the specified name is available for registration. function available(uint256 id) public view virtual returns (bool); /** * @dev Register a name. */ function register( uint256 id, address owner, uint256 duration ) external virtual returns (uint256); function renew(uint256 id, uint256 duration) external virtual returns (uint256); /** * @dev Reclaim ownership of a name in BNS, if you own it in the registrar. */ function reclaim(uint256 id, address owner) external virtual; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721.sol) pragma solidity ^0.8.0; import "../../utils/introspection/IERC165.sol"; /** * @dev Required interface of an ERC721 compliant contract. */ interface IERC721 is IERC165 { /** * @dev Emitted when `tokenId` token is transferred from `from` to `to`. */ event Transfer(address indexed from, address indexed to, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token. */ event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId); /** * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets. */ event ApprovalForAll(address indexed owner, address indexed operator, bool approved); /** * @dev Returns the number of tokens in ``owner``'s account. */ function balanceOf(address owner) external view returns (uint256 balance); /** * @dev Returns the owner of the `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function ownerOf(uint256 tokenId) external view returns (address owner); /** * @dev Safely transfers `tokenId` token from `from` to `to`. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes calldata data ) external; /** * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients * are aware of the ERC721 protocol to prevent tokens from being forever locked. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must exist and be owned by `from`. * - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}. * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer. * * Emits a {Transfer} event. */ function safeTransferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Transfers `tokenId` token from `from` to `to`. * * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible. * * Requirements: * * - `from` cannot be the zero address. * - `to` cannot be the zero address. * - `tokenId` token must be owned by `from`. * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. * * Emits a {Transfer} event. */ function transferFrom( address from, address to, uint256 tokenId ) external; /** * @dev Gives permission to `to` to transfer `tokenId` token to another account. * The approval is cleared when the token is transferred. * * Only a single account can be approved at a time, so approving the zero address clears previous approvals. * * Requirements: * * - The caller must own the token or be an approved operator. * - `tokenId` must exist. * * Emits an {Approval} event. */ function approve(address to, uint256 tokenId) external; /** * @dev Approve or remove `operator` as an operator for the caller. * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller. * * Requirements: * * - The `operator` cannot be the caller. * * Emits an {ApprovalForAll} event. */ function setApprovalForAll(address operator, bool _approved) external; /** * @dev Returns the account approved for `tokenId` token. * * Requirements: * * - `tokenId` must exist. */ function getApproved(uint256 tokenId) external view returns (address operator); /** * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`. * * See {setApprovalForAll} */ function isApprovedForAll(address owner, address operator) external view returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol) pragma solidity ^0.8.0; /** * @title ERC721 token receiver interface * @dev Interface for any contract that wants to support safeTransfers * from ERC721 asset contracts. */ interface IERC721Receiver { /** * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom} * by `operator` from `from`, this function is called. * * It must return its Solidity selector to confirm the token transfer. * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted. * * The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`. */ function onERC721Received( address operator, address from, uint256 tokenId, bytes calldata data ) external returns (bytes4); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol) pragma solidity ^0.8.0; import "../IERC721.sol"; /** * @title ERC-721 Non-Fungible Token Standard, optional metadata extension * @dev See https://eips.ethereum.org/EIPS/eip-721 */ interface IERC721Metadata is IERC721 { /** * @dev Returns the token collection name. */ function name() external view returns (string memory); /** * @dev Returns the token collection symbol. */ function symbol() external view returns (string memory); /** * @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token. */ function tokenURI(uint256 tokenId) external view returns (string memory); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value ) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResult(success, returndata, errorMessage); } /** * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Strings.sol) pragma solidity ^0.8.0; /** * @dev String operations. */ library Strings { bytes16 private constant _HEX_SYMBOLS = "0123456789abcdef"; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { // Inspired by OraclizeAPI's implementation - MIT licence // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol if (value == 0) { return "0"; } uint256 temp = value; uint256 digits; while (temp != 0) { digits++; temp /= 10; } bytes memory buffer = new bytes(digits); while (value != 0) { digits -= 1; buffer[digits] = bytes1(uint8(48 + uint256(value % 10))); value /= 10; } return string(buffer); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { if (value == 0) { return "0x00"; } uint256 temp = value; uint256 length = 0; while (temp != 0) { length++; temp >>= 8; } return toHexString(value, length); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = _HEX_SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol) pragma solidity ^0.8.0; import "./IERC165.sol"; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` * * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation. */ abstract contract ERC165 is IERC165 { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC165).interfaceId; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * 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 * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * 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); }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.4; import "./IABIResolver.sol"; import "../ResolverBase.sol"; interface IABIResolver { event ABIChanged(bytes32 indexed node, uint256 indexed contentType); /** * Returns the ABI associated with an BNS node. * Defined in EIP205. * @param node The BNS node to query * @param contentTypes A bitwise OR of the ABI formats accepted by the caller. * @return contentType The content type of the return value * @return data The ABI data */ function ABI(bytes32 node, uint256 contentTypes) external view returns (uint256, bytes memory); }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.4; /** * Interface for the new (multicoin) addr function. */ interface IAddressResolver { event AddressChanged( bytes32 indexed node, uint256 coinType, bytes newAddress ); function addr(bytes32 node, uint256 coinType) external view returns (bytes memory); }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.4; /** * Interface for the legacy (ETH-only) addr function. */ interface IAddrResolver { event AddrChanged(bytes32 indexed node, address a); /** * Returns the address associated with an BNS node. * @param node The BNS node to query. * @return The associated address. */ function addr(bytes32 node) external view returns (address payable); }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.4; interface IContentHashResolver { event ContenthashChanged(bytes32 indexed node, bytes hash); /** * Returns the contenthash associated with an BNS node. * @param node The BNS node to query. * @return The associated contenthash. */ function contenthash(bytes32 node) external view returns (bytes memory); }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.4; interface IDNSRecordResolver { // DNSRecordChanged is emitted whenever a given node/name/resource's RRSET is updated. event DNSRecordChanged( bytes32 indexed node, bytes name, uint16 resource, bytes record ); // DNSRecordDeleted is emitted whenever a given node/name/resource's RRSET is deleted. event DNSRecordDeleted(bytes32 indexed node, bytes name, uint16 resource); // DNSZoneCleared is emitted whenever a given node's zone information is cleared. event DNSZoneCleared(bytes32 indexed node); /** * Obtain a DNS record. * @param node the namehash of the node for which to fetch the record * @param name the keccak-256 hash of the fully-qualified name for which to fetch the record * @param resource the ID of the resource as per https://en.wikipedia.org/wiki/List_of_DNS_record_types * @return the DNS record in wire format if present, otherwise empty */ function dnsRecord( bytes32 node, bytes32 name, uint16 resource ) external view returns (bytes memory); }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.4; interface IDNSZoneResolver { // DNSZonehashChanged is emitted whenever a given node's zone hash is updated. event DNSZonehashChanged( bytes32 indexed node, bytes lastzonehash, bytes zonehash ); /** * zonehash obtains the hash for the zone. * @param node The BNS node to query. * @return The associated contenthash. */ function zonehash(bytes32 node) external view returns (bytes memory); }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.4; interface IInterfaceResolver { event InterfaceChanged( bytes32 indexed node, bytes4 indexed interfaceID, address implementer ); /** * Returns the address of a contract that implements the specified interface for this name. * If an implementer has not been set for this interfaceID and name, the resolver will query * the contract at `addr()`. If `addr()` is set, a contract exists at that address, and that * contract implements EIP165 and returns `true` for the specified interfaceID, its address * will be returned. * @param node The BNS node to query. * @param interfaceID The EIP 165 interface ID to check for. * @return The address that implements this interface, or 0 if the interface is unsupported. */ function interfaceImplementer(bytes32 node, bytes4 interfaceID) external view returns (address); }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.4; interface INameResolver { event NameChanged(bytes32 indexed node, string name); /** * Returns the name associated with an BNS node, for reverse records. * Defined in EIP181. * @param node The BNS node to query. * @return The associated name. */ function name(bytes32 node) external view returns (string memory); }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.4; interface IPubkeyResolver { event PubkeyChanged(bytes32 indexed node, bytes32 x, bytes32 y); /** * Returns the SECP256k1 public key associated with an BNS node. * Defined in EIP 619. * @param node The BNS node to query * @return x The X coordinate of the curve point for the public key. * @return y The Y coordinate of the curve point for the public key. */ function pubkey(bytes32 node) external view returns (bytes32 x, bytes32 y); }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.4; interface ITextResolver { event TextChanged( bytes32 indexed node, string indexed indexedKey, string key ); /** * Returns the text data associated with an BNS node and key. * @param node The BNS node to query. * @param key The text data key to query. * @return The associated text data. */ function text(bytes32 node, string calldata key) external view returns (string memory); }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.4; interface ISupportsInterface { function supportsInterface(bytes4 interfaceID) external pure returns (bool); }
// SPDX-License-Identifier: MIT pragma solidity >=0.8.4; import "./SupportsInterface.sol"; abstract contract ResolverBase is SupportsInterface { function isAuthorised(bytes32 node) internal view virtual returns (bool); modifier authorised(bytes32 node) { require(isAuthorised(node)); _; } }
// SPDX-License-Identifier: MIT pragma solidity ^0.8.4; import "./ISupportsInterface.sol"; abstract contract SupportsInterface is ISupportsInterface { function supportsInterface(bytes4 interfaceID) public pure virtual override returns (bool) { return interfaceID == type(ISupportsInterface).interfaceId; } }
{ "optimizer": { "enabled": true, "runs": 500 }, "metadata": { "bytecodeHash": "none", "useLiteralContent": true }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
Contract Security Audit
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INameValidator","name":"_nameValidator","type":"address"},{"internalType":"uint256","name":"_minCommitmentAge","type":"uint256"},{"internalType":"uint256","name":"_maxCommitmentAge","type":"uint256"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bool","name":"enableOrNot","type":"bool"}],"name":"IsMintStarted","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bool","name":"enableOrNot","type":"bool"}],"name":"IsNameValidation","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bool","name":"enableOrNot","type":"bool"}],"name":"IsPublicMint","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bool","name":"enableOrNot","type":"bool"}],"name":"IsWhitelistOn","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"bytes32","name":"newRoot","type":"bytes32"}],"name":"ModifyMerkleRoot","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"string","name":"name","type":"string"},{"indexed":true,"internalType":"bytes32","name":"label","type":"bytes32"},{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":false,"internalType":"uint256","name":"tokenId","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"createdAt","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"cost","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"expires","type":"uint256"}],"name":"NameRegistered","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"string","name":"name","type":"string"},{"indexed":true,"internalType":"bytes32","name":"label","type":"bytes32"},{"indexed":false,"internalType":"uint256","name":"cost","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"expires","type":"uint256"}],"name":"NameRenewed","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"validator","type":"address"}],"name":"NewNameValidator","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"oracle","type":"address"}],"name":"NewPriceOracle","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"string","name":"name","type":"string"},{"indexed":false,"internalType":"bool","name":"enableOrNot","type":"bool"}],"name":"ReservationName","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"string","name":"name","type":"string"},{"indexed":false,"internalType":"bool","name":"enableOrNot","type":"bool"}],"name":"WhitelistName","type":"event"},{"inputs":[],"name":"MIN_REGISTRATION_DURATION","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"name","type":"string"}],"name":"available","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"contract INameValidator","name":"_validator","type":"address"}],"name":"changeNameValidation","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"commitment","type":"bytes32"}],"name":"commit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"name":"commitments","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"isMintStarted","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"isNameValidation","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"isPublicMint","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"isReserve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"isWhitelist","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"isWhitelistOn","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"name","type":"string"},{"internalType":"address","name":"owner","type":"address"},{"internalType":"bytes32","name":"secret","type":"bytes32"}],"name":"makeCommitment","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"string","name":"name","type":"string"},{"internalType":"address","name":"owner","type":"address"},{"internalType":"bytes32","name":"secret","type":"bytes32"},{"internalType":"address","name":"resolver","type":"address"},{"internalType":"address","name":"addr","type":"address"}],"name":"makeCommitmentWithConfig","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"maxCommitmentAge","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"minCommitmentAge","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"name","type":"string"}],"name":"nameState","outputs":[{"internalType":"enum NameState.State","name":"state","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"string","name":"name","type":"string"},{"internalType":"address","name":"owner","type":"address"},{"internalType":"uint256","name":"duration","type":"uint256"},{"internalType":"bytes32","name":"secret","type":"bytes32"}],"name":"register","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"string","name":"name","type":"string"},{"internalType":"address","name":"owner","type":"address"},{"internalType":"uint256","name":"duration","type":"uint256"},{"internalType":"bytes32","name":"secret","type":"bytes32"},{"internalType":"address","name":"resolver","type":"address"},{"internalType":"address","name":"addr","type":"address"}],"name":"registerWithAdmin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"name","type":"string"},{"internalType":"address","name":"owner","type":"address"},{"internalType":"uint256","name":"duration","type":"uint256"},{"internalType":"bytes32","name":"secret","type":"bytes32"},{"internalType":"address","name":"resolver","type":"address"},{"internalType":"address","name":"addr","type":"address"}],"name":"registerWithConfig","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"string","name":"name","type":"string"},{"internalType":"address","name":"owner","type":"address"},{"internalType":"uint256","name":"duration","type":"uint256"},{"internalType":"bytes32","name":"secret","type":"bytes32"},{"internalType":"address","name":"resolver","type":"address"},{"internalType":"address","name":"addr","type":"address"},{"internalType":"bytes32[]","name":"proof","type":"bytes32[]"}],"name":"registerWithWhitelist","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"string","name":"name","type":"string"},{"internalType":"uint256","name":"duration","type":"uint256"}],"name":"renew","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"name","type":"string"},{"internalType":"uint256","name":"duration","type":"uint256"}],"name":"rentPrice","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"root","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_minCommitmentAge","type":"uint256"},{"internalType":"uint256","name":"_maxCommitmentAge","type":"uint256"}],"name":"setCommitmentAges","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bool","name":"enableOrNot","type":"bool"}],"name":"setIsMintStarted","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bool","name":"enableOrNot","type":"bool"}],"name":"setIsPublicMintOpen","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bool","name":"enableOrNot","type":"bool"}],"name":"setIsWhitelistOn","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"_root","type":"bytes32"}],"name":"setMerkleRoot","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bool","name":"enableOrNot","type":"bool"}],"name":"setNameValidation","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract PriceOracle","name":"_prices","type":"address"}],"name":"setPriceOracle","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string[]","name":"names","type":"string[]"},{"internalType":"bool[]","name":"enableOrNots","type":"bool[]"}],"name":"setReservationNames","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string[]","name":"names","type":"string[]"},{"internalType":"bool[]","name":"enableOrNots","type":"bool[]"}],"name":"setWhitelistNames","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceID","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"name","type":"string"}],"name":"valid","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
000000000000000000000000457efd33def0bff2dfe33089d385898d919d3a1000000000000000000000000005b4b9873c64acd24adf4c67aa5775c7c5e569250000000000000000000000001656d34c117490079c534bc17f0a61e805648983000000000000000000000000000000000000000000000000000000000000003c0000000000000000000000000000000000000000000000000000000000093a80
-----Decoded View---------------
Arg [0] : _base (address): 0x457eFd33Def0bFF2dfe33089D385898D919d3a10
Arg [1] : _prices (address): 0x05b4b9873c64aCD24ADf4C67AA5775C7c5E56925
Arg [2] : _nameValidator (address): 0x1656d34C117490079c534bc17f0a61e805648983
Arg [3] : _minCommitmentAge (uint256): 60
Arg [4] : _maxCommitmentAge (uint256): 604800
-----Encoded View---------------
5 Constructor Arguments found :
Arg [0] : 000000000000000000000000457efd33def0bff2dfe33089d385898d919d3a10
Arg [1] : 00000000000000000000000005b4b9873c64acd24adf4c67aa5775c7c5e56925
Arg [2] : 0000000000000000000000001656d34c117490079c534bc17f0a61e805648983
Arg [3] : 000000000000000000000000000000000000000000000000000000000000003c
Arg [4] : 0000000000000000000000000000000000000000000000000000000000093a80
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Multichain Portfolio | 24 Chains
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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.