Hyperion MCP Server

// SPDX-License-Identifier: MIT pragma solidity ^0.8.19; import "@openzeppelin/contracts/token/ERC721/ERC721.sol"; import "@openzeppelin/contracts/access/Ownable.sol"; /** * @title SimpleERC721 * @dev A simple ERC721 NFT contract with basic functionality */ contract SimpleERC721 is ERC721, Ownable { uint256 private _nextTokenId; // Optional mapping for token URIs mapping(uint256 => string) private _tokenURIs; constructor( string memory name, string memory symbol ) ERC721(name, symbol) Ownable(msg.sender) { _nextTokenId = 1; } /** * @dev Returns the total amount of tokens stored by the contract */ function totalSupply() public view returns (uint256) { return _nextTokenId - 1; } /** * @dev Returns the token URI for a given token ID */ function tokenURI(uint256 tokenId) public view virtual override returns (string memory) { _requireOwned(tokenId); string memory _tokenURI = _tokenURIs[tokenId]; string memory base = _baseURI(); // If there is no base URI, return the token URI. if (bytes(base).length == 0) { return _tokenURI; } // If both are set, concatenate the baseURI and tokenURI (via string.concat). if (bytes(_tokenURI).length > 0) { return string.concat(base, _tokenURI); } return super.tokenURI(tokenId); } /** * @dev Sets the token URI for a given token ID */ function _setTokenURI(uint256 tokenId, string memory _tokenURI) internal { _tokenURIs[tokenId] = _tokenURI; } /** * @dev Base URI for computing {tokenURI}. If set, the resulting URI for each * token will be the concatenation of the `baseURI` and the `tokenId`. */ function _baseURI() internal pure override returns (string memory) { return ""; } }