demo with native token sponsorship

Author: Haypierre

demo/paymaster.ts

@@ -33,8 +33,9 @@ export function getPaymasterActions(chain: supportedChain): PaymasterActions {
     getPaymasterData: async (
       parameters: GetPaymasterDataParameters,
     ): Promise<GetPaymasterDataReturnType> => {
-      const validAfter = await getBlockTimestamp(chain);
-      const validUntil = validAfter + 1_000_000n;
+      const currentBlockTimestamp = await getBlockTimestamp(chain);
+      const validAfter = currentBlockTimestamp - 1_000_000n;
+      const validUntil = currentBlockTimestamp + 1_000_000n;
 
       const postVerificationGas =
         parameters.paymasterPostOpGasLimit || BigInt(1e5);
@@ -89,9 +90,12 @@ export function getPaymasterActions(chain: supportedChain): PaymasterActions {
       parameters: GetPaymasterStubDataParameters,
     ): Promise<GetPaymasterStubDataReturnType> => {
       return {
-        paymasterAndData: (
+        paymaster: getAddress(pmAddress),
+        paymasterData: (
           await getPaymasterActions(chain).getPaymasterData(parameters)
-        ).paymasterAndData as Hex,
+        ).paymasterData as Hex,
+        paymasterPostOpGasLimit: BigInt(1e6),
+        paymasterVerificationGasLimit: BigInt(1e6),
       };
     },
   };

src/mocks/DemoNativeNFT.sol

@@ -0,0 +1,93 @@
+//SPDX-License-Identifier: Unlicense
+pragma solidity ^0.8.20;
+
+import {ERC721URIStorage} from "@openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol";
+import {ERC721} from "@openzeppelin/contracts/token/ERC721/ERC721.sol";
+import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
+import {Ownable} from "@openzeppelin/contracts/access/Ownable.sol";
+import {AccessControl} from "@openzeppelin/contracts/access/AccessControl.sol";
+import {Strings} from "@openzeppelin/contracts/utils/Strings.sol";
+
+/// @title DemoNativeNFT
+/// @notice
+/// @dev
+contract DemoNativeNFT is Ownable, AccessControl, ERC721URIStorage {
+    using Strings for uint256;
+
+    uint256 public tokenIdCounter;
+    string public baseTokenURI;
+    uint256 public mintPrice;
+
+    event PaymentTokenSet(address indexed paymentToken);
+    event MintPriceSet(uint256 indexed mintPrice);
+    event BaseURISet(string indexed baseURI);
+
+    constructor(address _owner, string memory _baseTokenURI, uint256 _mintPrice)
+        Ownable(_owner)
+        ERC721("DemoNFT", "DMON")
+    {
+        tokenIdCounter = 0;
+        baseTokenURI = _baseTokenURI;
+        mintPrice = _mintPrice;
+    }
+
+    ////////////////////////////////////////////////////////////////////////
+    /// Internal functions
+    ////////////////////////////////////////////////////////////////////////
+
+    function _baseURI() internal view override returns (string memory) {
+        return baseTokenURI;
+    }
+
+    ////////////////////////////////////////////////////////////////////////
+    /// Owner actions
+    ////////////////////////////////////////////////////////////////////////
+
+    function _transferOwnership(address newOwner) internal virtual override {
+        super._transferOwnership(newOwner);
+        _grantRole(DEFAULT_ADMIN_ROLE, newOwner);
+    }
+
+    /// @notice set a new baseTokenURI
+    /// @param _baseTokenURI the new base token URI
+    function setBaseURI(string memory _baseTokenURI) public onlyOwner {
+        baseTokenURI = _baseTokenURI;
+        emit BaseURISet(_baseTokenURI);
+    }
+
+    function setMintPrice(uint256 _mintPrice) public onlyOwner {
+        mintPrice = _mintPrice;
+        emit MintPriceSet(_mintPrice);
+    }
+
+    ////////////////////////////////////////////////////////////////////////
+    /// Minter action
+    ////////////////////////////////////////////////////////////////////////
+
+    /// @notice mint a NFT
+
+    function mint(string memory _tokenURI) public payable returns (uint256) {
+        require(msg.value == mintPrice, "Insufficient ETH sent");
+
+        unchecked {
+            ++tokenIdCounter;
+        }
+        uint256 newItemId = tokenIdCounter;
+        _safeMint(msg.sender, newItemId);
+        _setTokenURI(newItemId, _tokenURI);
+        return newItemId;
+    }
+
+    ////////////////////////////////////////////////////////////////////////
+    /// Interface functions
+    ////////////////////////////////////////////////////////////////////////
+
+    function supportsInterface(bytes4 interfaceId)
+        public
+        view
+        override(ERC721URIStorage, AccessControl)
+        returns (bool)
+    {
+        return ERC721URIStorage.supportsInterface(interfaceId) || AccessControl.supportsInterface(interfaceId);
+    }
+}