Using own wallet to automatically sign a tx on a webpage when a user does something

[jskerry77]

Hi,

First, forgive my terminology, I am very new to web-anything.
In short, I have a website where users can login using their tokens, solve some puzzles and upgrade their tokens by changing a stat when they solve the puzzles.

The upgrade function is ownerOnly on my contract, so I am using my private key in my js to create a wallet and when a condition is met, to sign a transaction with.

My transactions keep failing with the message: " Warning! Error encountered during contract execution [execution reverted] " on etherscan.

I have looked in these discussions and elsewhere too which helped me iron out some of the errors, but this is where I am stuck :) I left some comments to show what I have tried so far. so excuse the potential redundancies in there, just not sure if they are really redundant.

 async function handleThings(){
        if(window.ethereum){
            const provider = new ethers.providers.Web3Provider(window.ethereum);  //rinkeby
            const user = provider.getSigner();    //won't really sign anything actually, since they don't have the priv on the contract unless owner
            const userAddress = user.getAddress();
            
            const authprovider = new ethers.providers.EtherscanProvider("rinkeby"); //do I even need a 2nd provider? Just connecting to provider also didn't work
            const usercontract = new ethers.Contract(cur_address, cur.abi, user);

            const authwallet = new ethers.Wallet(process.env.REACT_APP_PRIVATE_KEY, provider);
            const authcontract = new ethers.Contract(cur_address, cur.abi, authwallet); //do I need a 2nd contract instance? I think not, but same errors regardless.
            
            try{
                //where I get the owned tokens. works fine.
                const tokens = await usercontract.balanceOf(userAddress);
                const tokenIDs = await usercontract.getOwnerTokenIds(userAddress);

               /* making sure we are on the same network, we are.
                console.log(user.provider);  
                console.log(authwallet.provider);
                 */       
  
                var txpromise = authcontract.populateTransaction.upgradeToken(tokenIDs[0],{gasLimit:100000});
                //txpromise.wait();  /not a function error
                console.log(txpromise); //logs it, no errors
                
                var send =  authwallet.sendTransaction(txpromise);
                send.then(function(txpromise){console.log(txpromise);});
                
            }catch(err){
                console.log("error: ", err);  //no errors, fails on etherscan
            }
        }
    }

The method I am calling works fine if I just call it with my function btw, so upgradeToken() definitely works when signed with my wallet (if I am the user and just sign my own contract) and errors out on user's. Just trying to make sure it can work automatically, using my wallet, so I don't have to go and check user's logs to see who gets an upgrade everyday manually 😆

Many thanks in advance.