chore(XPNFTToken): add base XPNFTToken

src/XPNFTToken.sol

@@ -0,0 +1,128 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.26;
+
+import { Base64 } from "@openzeppelin/contracts/utils/Base64.sol";
+import { Strings } from "@openzeppelin/contracts/utils/Strings.sol";
+import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol";
+
+interface IERC20 {
+    function balanceOf(address account) external view returns (uint256);
+}
+
+contract XPNFTToken is Ownable {
+    error XPNFT__TransferNotAllowed();
+    error XPNFT__InvalidTokenId();
+
+    string private _name = "XPNFT";
+    string private _symbol = "XPNFT";
+    string private _imagePrefix = "";
+    string private _imageSuffix = "";
+
+    IERC20 private _xpToken;
+
+    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
+
+    modifier onlyValidTokenId(uint256 tokenId) {
+        if (tokenId > type(uint160).max) {
+            revert XPNFT__InvalidTokenId();
+        }
+        _;
+    }
+
+    constructor(address xpTokenAddress, string memory imagePrefix, string memory imageSuffix) Ownable(msg.sender) {
+        _xpToken = IERC20(xpTokenAddress);
+        _imagePrefix = imagePrefix;
+        _imageSuffix = imageSuffix;
+    }
+
+    function setImageStrings(string memory imagePrefix, string memory imageSuffix) external onlyOwner {
+        _imagePrefix = imagePrefix;
+        _imageSuffix = imageSuffix;
+    }
+
+    function name() external view returns (string memory) {
+        return _name;
+    }
+
+    function symbol() external view returns (string memory) {
+        return _symbol;
+    }
+
+    function mint() external {
+        emit Transfer(msg.sender, msg.sender, uint256(uint160(msg.sender)));
+    }
+
+    function balanceOf(address) external pure returns (uint256) {
+        return 1;
+    }
+
+    function ownerOf(uint256 tokenId) external pure onlyValidTokenId(tokenId) returns (address) {
+        address owner = address(uint160(tokenId));
+        return owner;
+    }
+
+    function safeTransferFrom(address, address, uint256, bytes calldata) external pure {
+        revert XPNFT__TransferNotAllowed();
+    }
+
+    function safeTransferFrom(address, address, uint256) external pure {
+        revert XPNFT__TransferNotAllowed();
+    }
+
+    function transferFrom(address, address, uint256) external pure {
+        revert XPNFT__TransferNotAllowed();
+    }
+
+    function approve(address, uint256) external pure {
+        revert XPNFT__TransferNotAllowed();
+    }
+
+    function setApprovalForAll(address, bool) external pure {
+        revert XPNFT__TransferNotAllowed();
+    }
+
+    function getApproved(uint256) external pure returns (address) {
+        return address(0);
+    }
+
+    function isApprovedForAll(address, address) external pure returns (bool) {
+        return false;
+    }
+
+    function tokenURI(uint256 tokenId) external view onlyValidTokenId(tokenId) returns (string memory) {
+        address owner = address(uint160(tokenId));
+        return _createTokenURI(owner);
+    }
+
+    function _createTokenURI(address owner) internal view returns (string memory) {
+        string memory baseName = "XPNFT Token ";
+        string memory baseDescription = "This is a XPNFT token for address ";
+        uint256 balance = _xpToken.balanceOf(owner) / 1e18;
+
+        string memory propName = string(abi.encodePacked(baseName, Strings.toHexString(owner)));
+        string memory propDescription = string(
+            abi.encodePacked(baseDescription, Strings.toHexString(owner), " with balance ", Strings.toString(balance))
+        );
+        string memory image = _generateImage(balance);
+
+        bytes memory json = abi.encodePacked(
+            '{"name":"',
+            propName,
+            '","description":"',
+            propDescription,
+            '","image":"data:image/svg+xml;base64,',
+            image,
+            '"}'
+        );
+
+        string memory jsonBase64 = Base64.encode(json);
+        return string(abi.encodePacked("data:application/json;base64,", jsonBase64));
+    }
+
+    function _generateImage(uint256 balance) internal view returns (string memory) {
+        string memory text = Strings.toString(balance);
+        bytes memory svg = abi.encodePacked(_imagePrefix, text, _imageSuffix);
+
+        return Base64.encode(svg);
+    }
+}

test/XPNFTToken.t.sol

@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.26;
+
+import { Test, console } from "forge-std/Test.sol";
+import { MockToken } from "./mocks/MockToken.sol";
+import { XPNFTToken } from "../src/XPNFTToken.sol";
+
+contract XPNFTTokenTest is Test {
+    MockToken erc20Token;
+    XPNFTToken nft;
+
+    address alice = makeAddr("alice");
+
+    string imagePrefix =
+        '<svg xmlns="http://www.w3.org/2000/svg" height="200" width="200"><rect width="100%" height="100%" fill="blue"/><text x="50%" y="50%" fill="white" font-size="20" text-anchor="middle">';
+    string imageSuffix = "</text></svg>";
+
+    function setUp() public {
+        erc20Token = new MockToken("Test", "TEST");
+        nft = new XPNFTToken(address(erc20Token), imagePrefix, imageSuffix);
+
+        address[1] memory users = [alice];
+        for (uint256 i = 0; i < users.length; i++) {
+            erc20Token.mint(users[i], 10e18);
+        }
+    }
+
+    function test() public {
+        string memory metadata = nft.tokenURI(uint256(uint160(alice)));
+        console.log(metadata);
+    }
+}