feat: xp nfts contract skeleton

packages/zevm-app-contracts/contracts/xp-nft/test/xpNFTV2.sol

@@ -0,0 +1,10 @@
+// SPDX-License-Identifier: MIT
+pragma solidity 0.8.7;
+
+import "../xpNFT.sol";
+
+contract ZetaXPV2 is ZetaXP {
+    function version() public pure override returns (string memory) {
+        return "2.0.0";
+    }
+}

packages/zevm-app-contracts/contracts/xp-nft/xpNFT.sol

@@ -0,0 +1,148 @@
+// SPDX-License-Identifier: MIT
+pragma solidity 0.8.7;
+
+import "@openzeppelin/contracts-upgradeable/token/ERC721/ERC721Upgradeable.sol";
+import "@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol";
+
+contract ZetaXP is ERC721Upgradeable, OwnableUpgradeable {
+    /* An ECDSA signature. */
+    struct Signature {
+        uint8 v;
+        bytes32 r;
+        bytes32 s;
+    }
+
+    struct UpdateData {
+        address to;
+        uint256 tokenId;
+        Signature signature;
+        uint256 sigTimestamp;
+        uint256 signedUp;
+    }
+
+    mapping(uint256 => uint256) lastUpdateTimestampByTokenId;
+    mapping(uint256 => uint256) signedUpByTokenId;
+
+    // Base URL for NFT images
+    string public baseTokenURI;
+    address public signerAddress;
+
+    // Event for New Mint
+    event NewNFTMinted(address indexed sender, uint256 indexed tokenId);
+    // Event for NFT Update
+    event NFTUpdated(address indexed sender, uint256 indexed tokenId);
+
+    error InvalidSigner();
+    error LengthMismatch();
+    error TransferNotAllowed();
+    error OutdatedSignature();
+
+    function initialize(
+        string memory name,
+        string memory symbol,
+        string memory baseTokenURI_,
+        address signerAddress_
+    ) public initializer {
+        __ERC721_init(name, symbol);
+        __Ownable_init();
+        baseTokenURI = baseTokenURI_;
+        signerAddress = signerAddress_;
+    }
+
+    function version() public pure virtual returns (string memory) {
+        return "1.0.0";
+    }
+
+    // The following functions are overrides required by Solidity.
+    function tokenURI(uint256 tokenId) public view override(ERC721Upgradeable) returns (string memory) {
+        _requireMinted(tokenId);
+
+        return string(abi.encodePacked(baseTokenURI, _uint2str(tokenId)));
+    }
+
+    function supportsInterface(bytes4 interfaceId) public view override(ERC721Upgradeable) returns (bool) {
+        return super.supportsInterface(interfaceId);
+    }
+
+    // Helper function to convert uint to string
+    function _uint2str(uint _i) internal pure returns (string memory _uintAsString) {
+        if (_i == 0) {
+            return "0";
+        }
+        uint j = _i;
+        uint len;
+        while (j != 0) {
+            len++;
+            j /= 10;
+        }
+        bytes memory bstr = new bytes(len);
+        uint k = len;
+        while (_i != 0) {
+            k = k - 1;
+            uint8 temp = (uint8(48 + (_i % 10)));
+            bstr[k] = bytes1(temp);
+            _i /= 10;
+        }
+        return string(bstr);
+    }
+
+    function _verify(UpdateData memory updateData) private view {
+        bytes32 payloadHash = _calculateHash(updateData);
+        bytes32 messageHash = keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", payloadHash));
+
+        address messageSigner = ecrecover(
+            messageHash,
+            updateData.signature.v,
+            updateData.signature.r,
+            updateData.signature.s
+        );
+
+        if (signerAddress != messageSigner) revert InvalidSigner();
+        if (updateData.sigTimestamp <= lastUpdateTimestampByTokenId[updateData.tokenId]) revert OutdatedSignature();
+    }
+
+    // Function to compute the hash of the data and tasks for a token
+    function _calculateHash(UpdateData memory updateData) private pure returns (bytes32) {
+        bytes memory encodedData = abi.encode(
+            updateData.to,
+            updateData.tokenId,
+            updateData.sigTimestamp,
+            updateData.signedUp
+        );
+
+        return keccak256(encodedData);
+    }
+
+    function _updateNFT(UpdateData memory updateData) internal {
+        _verify(updateData);
+        lastUpdateTimestampByTokenId[updateData.tokenId] = updateData.sigTimestamp;
+        signedUpByTokenId[updateData.tokenId] = updateData.signedUp;
+    }
+
+    // External mint function
+    function mintNFT(UpdateData calldata mintData) external {
+        _mint(mintData.to, mintData.tokenId);
+
+        _updateNFT(mintData);
+
+        emit NewNFTMinted(mintData.to, mintData.tokenId);
+    }
+
+    // External mint function
+    function updateNFT(UpdateData memory updateData) external {
+        address owner = ownerOf(updateData.tokenId);
+        updateData.to = owner;
+        _updateNFT(updateData);
+
+        emit NFTUpdated(owner, updateData.tokenId);
+    }
+
+    // Set the base URI for tokens
+    function setBaseURI(string calldata _uri) external onlyOwner {
+        baseTokenURI = _uri;
+    }
+
+    function _transfer(address from, address to, uint256 tokenId) internal override {
+        revert TransferNotAllowed();
+    }
+}

packages/zevm-app-contracts/hardhat.config.ts

@@ -1,6 +1,7 @@
 import "@nomicfoundation/hardhat-verify";
 import "@nomiclabs/hardhat-waffle";
 import "@typechain/hardhat";
+import "@openzeppelin/hardhat-upgrades";
 import "hardhat-gas-reporter";
 import "solidity-coverage";
 import "tsconfig-paths/register";

packages/zevm-app-contracts/package.json

@@ -35,6 +35,8 @@
   },
   "dependencies": {
     "@openzeppelin/contracts": "4.9.3",
+    "@openzeppelin/contracts-upgradeable": "4.9.3",
+    "@openzeppelin/hardhat-upgrades": "^1.7.0-rc.0",
     "@uniswap/v2-periphery": "1.1.0-beta.0",
     "@zetachain/networks": "^4.0.0",
     "@zetachain/protocol-contracts": "^4.0.1",

packages/zevm-app-contracts/test/xp-nft/test.helpers.ts

@@ -0,0 +1,38 @@
+import { SignerWithAddress } from "@nomiclabs/hardhat-ethers/signers";
+import { ethers } from "hardhat";
+
+export interface Signature {
+  r: string;
+  s: string;
+  v: number;
+}
+
+export interface NFT {
+  signedUp: number;
+  to: string;
+  tokenId: number;
+}
+
+export interface UpdateParam extends NFT {
+  sigTimestamp: number;
+  signature: Signature;
+}
+
+export const getSignature = async (
+  signer: SignerWithAddress,
+  timestamp: number,
+  to: string,
+  tokenId: number,
+  nft: NFT
+) => {
+  let payload = ethers.utils.defaultAbiCoder.encode(
+    ["address", "uint256", "uint256", "uint256"],
+    [to, tokenId, timestamp, nft.signedUp]
+  );
+
+  const payloadHash = ethers.utils.keccak256(payload);
+
+  // This adds the message prefix
+  const signature = await signer.signMessage(ethers.utils.arrayify(payloadHash));
+  return ethers.utils.splitSignature(signature);
+};