Errors after deploying to Goerli testnet

Question

I hosted my Lottery website on fleek.co and everything works fine while on hardhat local network. So I decided to test it on Goerli and I'm facing error after error.

At first I got the error 1 below and manually added a gas limit in the hardhat config file. After re-deploying the contract and publishing on fleek, at first, enterRaffle works fine.

When I try to enterRaffle the second time, it fails. Other times it's successful. But even then, it doesn't update the num of players like it's supposed to.

What I'm I missing?

Error 1

Error: cannot estimate gas; transaction may fail or may require manual gas limit [ See: https://links.ethers.org/v5-errors-UNPREDICTABLE_GAS_LIMIT ] (error={"code":-32603,"message":"execution reverted","data":{"originalError":{"code":3,"data":"0x1425571c","message":"execution reverted"}}}, method="estimateGas", transaction={"from":"0x13A19933267ec307c96f3dE8Ff8A2392C39263EB","to":"0x5507C7e274B5201a98141cCd0507cF6e4416Be30","value":{"type":"BigNumber","hex":"0x2386f26fc10000"},"data":"0x2cfcc539","accessList":null}, code=UNPREDICTABLE_GAS_LIMIT, version=providers/5.6.0)
    at su.makeError (_app-3ca186e4a2557e86.js:1:1975135)
    at su.throwError (_app-3ca186e4a2557e86.js:1:1975255)
    at yh (_app-3ca186e4a2557e86.js:1:2115696)
    at Ad.<anonymous> (_app-3ca186e4a2557e86.js:1:2123240)
    at Generator.throw (<anonymous>)
    at s (_app-3ca186e4a2557e86.js:1:2114235)

Then after adding gas manually like so, error 2 occurs.

        goerli: {
            url: GOERLI_RPC_URL,
            accounts: PRIVATE_KEY !== undefined ? [PRIVATE_KEY] : [],
            //   accounts: {
            //     mnemonic: MNEMONIC,
            //   },
            saveDeployments: true,
            chainId: 5,
            gas: 6000000,
        },

Error 2

_app-3ca186e4a2557e86.js:1 Uncaught (in promise) Error: transaction failed [ See: https://links.ethers.org/v5-errors-CALL_EXCEPTION ] (transactionHash="0x1c28a6b2bfb02f23f443a854c998bec3d965a6beff525f0431480d063e5214c2", transaction={"hash":"0x1c28a6b2bfb02f23f443a854c998bec3d965a6beff525f0431480d063e5214c2","type":2,"accessList":null,"blockHash":null,"blockNumber":null,"transactionIndex":null,"confirmations":0,"from":"0x13A19933267ec307c96f3dE8Ff8A2392C39263EB","gasPrice":{"type":"BigNumber","hex":"0x6bc0e597"},"maxPriorityFeePerGas":{"type":"BigNumber","hex":"0x59682f00"},"maxFeePerGas":{"type":"BigNumber","hex":"0x6bc0e597"},"gasLimit":{"type":"BigNumber","hex":"0x4c9e58"},"to":"0x5507C7e274B5201a98141cCd0507cF6e4416Be30","value":{"type":"BigNumber","hex":"0x2386f26fc10000"},"nonce":49,"data":"0x2cfcc539","r":"0x3869c8f2e2ecaa492c528f2065d156cdb855a6f2af9669a5472c97473f6f5d74","s":"0x1ae3086d065b24e61c4a01ea1a25a4e1109a809e8a5e8c40fba7a58d8c8e05b2","v":0,"creates":null,"chainId":0}, receipt={"to":"0x5507C7e274B5201a98141cCd0507cF6e4416Be30","from":"0x13A19933267ec307c96f3dE8Ff8A2392C39263EB","contractAddress":null,"transactionIndex":18,"gasUsed":{"type":"BigNumber","hex":"0x6448"},"logsBloom":"0x00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000","blockHash":"0x4cc5aa906cc1a68ef49ade23bec8f679abeb0c2439cc2798d9f5244550bcb8a4","transactionHash":"0x1c28a6b2bfb02f23f443a854c998bec3d965a6beff525f0431480d063e5214c2","logs":[],"blockNumber":7723284,"confirmations":2,"cumulativeGasUsed":{"type":"BigNumber","hex":"0x28a252"},"effectiveGasPrice":{"type":"BigNumber","hex":"0x67d1c29b"},"status":0,"type":2,"byzantium":true}, code=CALL_EXCEPTION, version=providers/5.6.0)
    at su.makeError (_app-3ca186e4a2557e86.js:1:1975135)
    at su.throwError (_app-3ca186e4a2557e86.js:1:1975255)
    at Ad.<anonymous> (_app-3ca186e4a2557e86.js:1:2091815)
    at Generator.next (<anonymous>)
    at a (_app-3ca186e4a2557e86.js:1:2072233)

site url

Front-End Repo

Back-End Repo

Answer 1

In my opinion it has something to do with the enum - it does not reset its state back to OPEN ( which I see happens in the fulfillrandomwords() function.

My 2 suggestions:

1. Make sure that the contract is linked to a subscription with enough test LINK in it
2. It may also be dues to rounding the randomWords number with the modulo.In the fullfillRandomWords() function, at line 154 , you may try changing it to:

       uint256 indexOfWinner = (randomWords[0] % s_players.length)*1 ;

I hope some of this helps.

Answer 2

Gas estimation is being done by running the code virtually. And if the code gives an error, the application cannot estimate the gas. Even if you manually set the gas and still call the function, this time it will work on evm and will still be a failed transaction.

In your case if the app gives "Error: cannot estimate gas" when you call enterRaffle either if the RaffleState is not Open at the time of call or amount is less then i_enteranceFee.

Answer 3

Had forgotten to write an update here. So, I noticed something;

The issue was with the ABI.

When I deploy, hh deploy --network goerli The abi looks like this one below; (this works fine)

{
        "type": "function",
        "name": "getNumWords",
        "constant": true,
        "stateMutability": "pure",
        "payable": false,
        "inputs": [],
        "outputs": [{ "type": "uint256" }]
    },

When I quit my local hardhat node and spin it up again, ```hh node`` The abi (in constants folder), updates itself to this; (that's where the gas field is added);

{
        "type": "function",
        "name": "getLastestTimeStamp",
        "constant": true,
        "stateMutability": "view",
        "payable": false,
        "gas": 29000000,           // here
        "inputs": [],
        "outputs": [{ "type": "uint256" }]
    },

I don't know why rerunning the node changes the abi, but after running with the correct ABI, everything works fine.