web3.tokyo NFT

Chain: Polygon Mainnet

code:web3tokyo.sol

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.17;

import "@openzeppelin/contracts/token/ERC721/ERC721.sol";

import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";

import "@openzeppelin/contracts/access/Ownable.sol";

import "@openzeppelin/contracts/utils/Strings.sol";

import "@openzeppelin/contracts/utils/Base64.sol";

contract Web3Tokyo is ERC721Enumerable, Ownable {

using Strings for uint256;

// tokenId => blockId

mapping(uint256 => uint256) public blockIds;

constructor() ERC721("web3.tokyo", "W3T") {

}

function imageData(uint256 tokenId)

internal

view

returns (string memory)

{

bytes memory data = abi.encodePacked(

'PoA at web3.tokyo block',

'</text></svg>'

);

return string(

abi.encodePacked(

"data:image/svg+xml;base64,",

Base64.encode(data)

)

);

}

function tokenURI(uint256 tokenId)

public

view

override

returns (string memory)

{

require(_exists(tokenId));

bytes memory data = abi.encodePacked(

'{',

'"image": "', imageData(tokenId), '"',

'}'

);

return string(

abi.encodePacked(

"data:application/json;base64,",

Base64.encode(data)

)

);

}

function mint(address beneficiary, uint256 blockId)

onlyOwner

public

{

_mint(beneficiary, totalSupply());

}

function withdraw() external onlyOwner {

payable(owner()).transfer(address(this).balance);

}

receive() external payable {}

}

Deployment Cost

https://scrapbox.io/files/63d8d865ca7c6c001de4437e.png