make the licenses non transferable

Author: Christopher Powroznik

packages/core/src/config.ts

@@ -2,7 +2,7 @@ export const config = {
   "arbitrumBlockExplorer": "https://arbiscan.io",
   "arbitrumGoerliBlockExplorer": "https://goerli.arbiscan.io",
   "defaultRpcUrl": "https://goerli-rollup.arbitrum.io/rpc",
-  "nodeLicenseAddress": "0x21aff6e15A09265D9906C45bFC480C37F3BBbAA8",
-  "refereeAddress": "0xC42eb633460fe2006eD1d4E56aD3152D35F81612",
+  "nodeLicenseAddress": "0xef2174b8B6a5B822113A2362BA60926c0331a50B",
+  "refereeAddress": "0x9E8B904A241388022d92C0054E21F0d2f6f178aF",
   "rollupAddress": "0x082742561295f6e1b43c4f5d1e2d52d7FfE082f1"
 };

packages/smart-contracts/contracts/NodeLicense.sol

@@ -114,6 +114,16 @@ contract NodeLicense is ERC721Enumerable, AccessControl {
     function supportsInterface(bytes4 interfaceId) public view override(ERC721Enumerable, AccessControl) returns (bool) {
         return super.supportsInterface(interfaceId);
     }
+
+    /**
+     * @notice Overrides the transfer function of the ERC721 contract to make the token non-transferable.
+     * @param from The current owner of the token.
+     * @param to The address to receive the token.
+     * @param tokenId The token id.
+     */
+    function _transfer(address from, address to, uint256 tokenId) internal override {
+        revert("NodeLicense: transfer is not allowed");
+    }
 }