HandshakeNft
Git Source (opens in a new tab)
Author: Sam Ward
Inherits: ERC721, Ownable
State Variables
TOKEN_URI_SELECTOR
bytes4 private constant TOKEN_URI_SELECTOR = bytes4(keccak256("tokenURI(bytes32)"));tokenResolverMap
mapping(bytes32 => IResolver) public tokenResolverMap;defaultResolver
IResolver defaultResolver;metadata
IMetadataService public metadata;Functions
constructor
constructor(string memory _symbol, string memory _name) ERC721(_symbol, _name);tokenURI
function tokenURI(uint256 _id) public view override returns (string memory);setMetadataContract
function setMetadataContract(IMetadataService _metadata) external onlyOwner;setDefaultResolver
function setDefaultResolver(IResolver _resolver) external onlyOwner;setResolver
function setResolver(bytes32 _namehash, IResolver _resolver) public virtual onlyApprovedOrOwner(uint256(_namehash));supportsInterface
function supportsInterface(bytes4 interfaceId) public view override returns (bool);ownerOf
Gets the owner of the specified token ID. Names become unowned when their registration expires.
function ownerOf(uint256 tokenId) public view virtual override(ERC721) returns (address);Parameters
| Name | Type | Description |
|---|---|---|
tokenId | uint256 | uint256 ID of the token to query the owner of |
Returns
| Name | Type | Description |
|---|---|---|
<none> | address | address currently marked as the owner of the given token ID |
_isApprovedOrOwner
custom version of _isApprovedOrOwner which calls ownerOf(tokenId) and takes expiration into consideration instead of ERC721.ownerOf(tokenId);
function _isApprovedOrOwner(address spender, uint256 tokenId) internal view override returns (bool);Parameters
| Name | Type | Description |
|---|---|---|
spender | address | address of the spender to query |
tokenId | uint256 | uint256 ID of the token to be transferred |
Returns
| Name | Type | Description |
|---|---|---|
<none> | bool | bool whether spender is approved for the given token ID, is an operator of the owner, or is the owner of the token |
isApprovedOrOwner
public version of _isApprovedOrOwner which calls ownerOf(tokenId) and takes expiration into consideration instead of ERC721.ownerOf(tokenId);
function isApprovedOrOwner(address spender, uint256 tokenId) public view virtual returns (bool);Parameters
| Name | Type | Description |
|---|---|---|
spender | address | address of the spender to query |
tokenId | uint256 | uint256 ID of the token to be transferred |
Returns
| Name | Type | Description |
|---|---|---|
<none> | bool | bool whether the spender is approved for the given token ID, is an operator of the owner, or is the owner of the token |
name
returns back the string representation of the name. It makes more sense to have it here than on the resolver as the resolver can be updated and we will likely use the name string in the metadata class
should override this function in the inherited class
function name(bytes32 _namehash) external view virtual returns (string memory _name);Parameters
| Name | Type | Description |
|---|---|---|
_namehash | bytes32 | bytes32 representaion of the domain |
Returns
| Name | Type | Description |
|---|---|---|
_name | string | fully qualified name of the domain / NFT |
parent
function parent(bytes32 _namehash) external view virtual returns (string memory _parentName);expiry
function expiry(bytes32 _namehash) external view virtual returns (uint256 _expiry);onlyApprovedOrOwner
modifier version of _isApprovedOrOwner which calls ownerOf(tokenId) and takes expiration into consideration instead of ERC721.ownerOf(tokenId);
modifier onlyApprovedOrOwner(uint256 tokenId);Parameters
| Name | Type | Description |
|---|---|---|
tokenId | uint256 | uint256 ID of the token to be transferred |
exists
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) public view virtual returns (bool);