diff --git a/contracts/package/tokens/ERC721STD.sol b/contracts/package/tokens/ERC721STD.sol
index ec2a80a..38838a3 100644
--- a/contracts/package/tokens/ERC721STD.sol
+++ b/contracts/package/tokens/ERC721STD.sol
@@ -10,8 +10,6 @@ import '../royalty/DerivedERC2981Royalty.sol';
 import "@openzeppelin/contracts/access/extensions/AccessControlEnumerable.sol";
 import {IAccessControl} from "@openzeppelin/contracts/access/IAccessControl.sol";
 
-import "hardhat/console.sol";
-
 contract ERC721STD is
 	ERC721Burnable,
 	ERC5169,
@@ -20,7 +18,7 @@ contract ERC721STD is
     ERC721URIStorage,
     ERC721Enumerable
 {
-    bytes32 private constant MINTER_ROLE = keccak256("MINTER_ROLE");
+    bytes32 private constant _MINTER_ROLE = keccak256("MINTER_ROLE");
 
     string public contractURI;
     string public baseURI;
@@ -28,7 +26,7 @@ contract ERC721STD is
     uint public royaltyPercentage;
     uint public nextTokenId;
 
-    event contractUriChanged(string newURI);
+    event ContractUriChanged(string newURI);
     event RoyaltyDataChanged(address addr, uint percentage);
 
     error TooHighRoyaltyPercentage();
@@ -36,14 +34,14 @@ contract ERC721STD is
 
     constructor(string memory _name, string memory _symbol) ERC721(_name, _symbol) {
         _grantRole(DEFAULT_ADMIN_ROLE, msg.sender);
-        _grantRole(MINTER_ROLE, msg.sender);
+        _grantRole(_MINTER_ROLE, msg.sender);
         _setRoyaltyData(msg.sender, 5 * 100);
     }
 
     function _authorizeSetScripts(string[] memory) internal virtual override onlyRole(DEFAULT_ADMIN_ROLE) {}
 
     // function isMinter(address _account) public view returns (bool) {
-    //     return hasRole(MINTER_ROLE, _account);
+    //     return hasRole(_MINTER_ROLE, _account);
     // }
 
     function owner() public view returns (address) {
@@ -76,7 +74,7 @@ contract ERC721STD is
 
     function setContractURI(string calldata newURI) external onlyRole(DEFAULT_ADMIN_ROLE){
         contractURI = newURI;
-        emit contractUriChanged(newURI);
+        emit ContractUriChanged(newURI);
     }
 
     function royaltyInfo(uint256 tokenId, uint256 salePrice) external view override
@@ -109,7 +107,7 @@ contract ERC721STD is
         baseURI = newBaseUri;
     }
 
-    function setTokenURI(uint256 tokenId, string memory _tokenURI) external onlyRole(MINTER_ROLE){
+    function setTokenURI(uint256 tokenId, string memory _tokenURI) external onlyRole(_MINTER_ROLE){
         _setTokenURI(tokenId, _tokenURI);
     }
 
@@ -121,7 +119,7 @@ contract ERC721STD is
     @param uri - can be empty string, minter can set the value later
     tokenId auto-increase
     */
-    function mint(address to, string memory uri) external onlyRole(MINTER_ROLE){
+    function mint(address to, string memory uri) external onlyRole(_MINTER_ROLE){
         _mint(to, nextTokenId);
         if (bytes(uri).length > 0){
             _setTokenURI(nextTokenId, uri);
@@ -130,6 +128,6 @@ contract ERC721STD is
     }
 
     // function contractURI() external pure returns (string memory){
-    //     return "https://resources.smarttokenlabs.com/contract/SLN.json";
+    //     return contractURI;
     // }
 }
\ No newline at end of file
diff --git a/hardhat.config.ts b/hardhat.config.ts
index 544a71a..214ba38 100644
--- a/hardhat.config.ts
+++ b/hardhat.config.ts
@@ -127,8 +127,14 @@ let config = {
       url: `https://rinkeby.infura.io/v3/${INFURA_API_KEY}`,
       accounts: [`${PRIVATE_KEY}`],
     },
+      // "https://rpc-mumbai.maticvigil.com",
+      // "https://polygon-mumbai-bor.publicnode.com",
+      // "wss://polygon-mumbai-bor.publicnode.com",
+      // "https://polygon-mumbai.gateway.tenderly.co",
+      // "wss://polygon-mumbai.gateway.tenderly.co"
+      // "https://matic-mumbai.chainstacklabs.com"
     polygonMumbai: {
-      url: `https://matic-mumbai.chainstacklabs.com`, //ths RPC seems to work more consistently
+      url: `https://rpc-mumbai.maticvigil.com`, //ths RPC seems to work more consistently
       accounts: [`${PRIVATE_KEY}`],
     },
     mainnet: {
@@ -167,8 +173,9 @@ let config = {
       accounts: [`${PRIVATE_KEY}`],
     },
   },
-  /*
+  
   etherscan: {
+    enabled: true,
     // Your API key for Etherscan
     // Obtain one at https://etherscan.io/
     apiKey: {
@@ -181,7 +188,7 @@ let config = {
       optimisticEthereum: `${OPTIMISM_API_KEY}`,
     },
   },
-  */
+  
 };
 
 if (argv.gas) {
diff --git a/scripts/prepareContractData.ts b/scripts/prepareContractData.ts
new file mode 100644
index 0000000..42c6971
--- /dev/null
+++ b/scripts/prepareContractData.ts
@@ -0,0 +1,39 @@
+import * as fs from 'fs';
+const hre = require("hardhat");
+
+async function main(){
+
+    const contractPath = "contracts/package/tokens/"
+    const contractName = "ERC721STD"
+
+    const sourceJSON = await hre.run("verify:etherscan-get-minimal-input", {
+        sourceName: `${contractPath}${contractName}.sol`,
+    })
+
+    let contractMeta = {
+        // title to show on STS
+        title: "ERC721",
+        // contract NAME
+        name: contractName,
+        verificationName: `${contractPath}${contractName}.sol:${contractName}`,
+        git: "https://github.com/AlphaWallet/stl-contracts/blob/main/contracts/package/tokens/ERC721STD.sol",
+        description: "This ERC721 implementation is Mintable, Burnable, Enumerable, use AccessControl, has Metadata control, can change ContractURI, supports ERC5169",
+        compiler: "v0.8.20+commit.a1b79de6",
+        codeformat: "solidity-standard-json-input",
+        // uncomment next line to disable this contract
+        // disabled: false,
+        // "0" or "1"
+        optimizationused: "1",
+        runs: "200",
+        content: sourceJSON
+    }
+
+    const contractJSONData = await fs.promises.readFile(`artifacts/${contractPath}/${contractName}.sol/${contractName}.json`, 'utf8');
+    const contractJSON = JSON.parse(contractJSONData)
+
+    contractMeta = Object.assign(contractMeta, contractJSON)
+
+    await fs.promises.writeFile(`./${contractName}.json`, JSON.stringify([contractMeta]));
+}
+main()
+