Update inverse app projection to work with ZK proofs

packages/contracts/evm-contracts/contracts/token/IInverseAppProjectedNft.sol

@@ -13,5 +13,17 @@ interface IInverseAppProjectedNft is IInverseProjectedNft {
     /// Increases the `totalSupply` and `currentTokenId`.
     /// Reverts if `_to` is a zero address or if it refers to smart contract but does not implement IERC721Receiver-onERC721Received.
     /// Emits the `Minted` event.
+    /// @param _to where to send the NFT to
+    /// @param _verificationData any additional data to verify the validity of the mint
+    function mint(address _to, bytes memory _verificationData) external returns (uint256);
+
+    /// @dev This works identically to the other function with an extra data parameter,
+    ///      except this function just sets data to "".
     function mint(address _to) external returns (uint256);
+
+    /// @notice Returns the last nonce used (or 0 if the user has never minted)
+    /// @dev Useful if you need to either needs to
+    ///      1. Check if the nonce matches the expected value, or if more NFTs need to be minted
+    ///      2. Use a nonce algorithm where the next nonce depends on the current nonce
+    function currentNonce(address seller) external view returns (uint256);
 }

packages/contracts/evm-contracts/contracts/token/InverseAppProjectedNft.sol

@@ -60,12 +60,26 @@ contract InverseAppProjectedNft is IInverseAppProjectedNft, ERC721, Ownable {
             super.supportsInterface(interfaceId);
     }
 
+    function currentNonce(address user) external view returns (uint256) {
+        return mintCount[user];
+    }
+
+    function validateMint(address, bytes memory) internal virtual returns (bool) {
+        // Base contract allows any mint
+        // Replace this with any custom verification logic
+        return true;
+    }
+
     /// @dev Mints a new token to address `_to`.
     /// Increases the `totalSupply` and `currentTokenId`.
     /// Reverts if `_to` is a zero address or if it refers to smart contract but does not implement IERC721Receiver-onERC721Received.
     /// Emits the `Minted` event.
-    function mint(address _to) public virtual returns (uint256) {
+    function mint(address _to, bytes calldata _verificationData) public virtual returns (uint256) {
         require(_to != address(0), "InverseAppProjectedNft: zero receiver address");
+        require(
+            validateMint(_to, _verificationData),
+            "InverseAppProjectedNft: invalid verification data"
+        );
 
         uint256 tokenId = currentTokenId;
         _safeMint(_to, tokenId);
@@ -80,6 +94,10 @@ contract InverseAppProjectedNft is IInverseAppProjectedNft, ERC721, Ownable {
         return tokenId;
     }
 
+    function mint(address _to) external returns (uint256) {
+        return this.mint(_to, "");
+    }
+
     /// @dev Burns token of ID `_tokenId`. Callable only by the owner of the specified token.
     /// Reverts if `_tokenId` does not exist.
     function burn(uint256 _tokenId) public virtual onlyTokenOwner(_tokenId) {