[SOLVED] useWeb3Contract function not working, how to use ethers directly

Moralis General
#1

Hey guys,

I’m trying to test my contract on the Mumbai Testnet, however the following function returns a MetaMask RPC error: block gas limit exceeded.

  const {
    runContractFunction: createClone,
    isFetching,
    isLoading,
  } = useWeb3Contract({
    abi: wfABI,
    contractAddress: "0xa56F180aF0A73d948b6B386616f549279F4d6e4d",
    functionName: "createClone",
    params: {},
    msgValue: ethers.utils.parseUnits("1000000000000000", "wei"),
  });

The same function works on the Mumbai testnet when I run it on the Hardhat CLI and it also works from the front end when I use Hardhat, however for some reason it’s not working on my moralis front end when I try it with Polygon Mumbai. I have double checked the addresses, abi, etc, and I still can’t figure out why this isn’t working. I’ve added gasLimit using ethers manually as well.

This is the exact error I get: MetaMask - RPC Error: [ethjs-query] while formatting outputs from RPC '{"value":{"code":-32603,"data":{"code":-32000,"message":"exceeds block gas limit"}}}' {code: -32603, message: [ethjs-query] while formatting outputs from RPC ‘{…e":-32000,“message”:“exceeds block gas limit”}}}’}

Thanks!

1 Like
#2

what Is the gas cost associated with that transaction?

that error looks like too much gas was associated with that transaction

#3

Nope, it’s not really a lot of gas. Also, it works when I use Hardhat CLI on the testnet it works. I changed the RPC Url and now I’m getting a different error:

inpage.js:1 MetaMask - RPC Error: JsonRpcEngine: Response has no error or result for request:
{
  "method": "eth_getBalance",
  "params": [
    "0xdd8c868ee486e2d0778b7c174917a15ce2a4530a",
    "0x1b70aac"
  ],
  "jsonrpc": "2.0",
  "id": 1087160063,
  "origin": "http://localhost:3000",
  "tabId": 96231278
#4

Maybe is related to the RPC url. You are trying that with local hardhat RPC url added in MetaMask?

#5

Nope, with the Polygon Mumbai RPC. It works on hardhat.

#6

It works from hardhat CLI on polygon mumbai as well. You can check out this address on Polygon scan, I just did a transaction: 0xa56F180aF0A73d948b6B386616f549279F4d6e4d

It’s only not working from my front end for some reason.

#7

this is a normal RPC request that tries to check the balance for an address, it does not try to deploy a contract

#8

I’m not trying to deploy a contract, I’m trying to perform a transaction.

In my frontend, is there anywhere for me to specify chainID? (incase it’s something to do with that)

#9

you select the network in metamask and the frontend should use the chain/network that is selected in metamask

#10

I tried doing it on Goerli and I got an unhandled runtime error which usually means gas estimation failed. It definitely has something to do with gas.

When I run it on Hardhat, I specify gasLimit like this:

tx = await wf.connect(creator).createClone({
                value: ethers.utils.parseUnits("1000000000000000", "wei"),
                gasLimit: 6000000,
              })

As of now, I’m specifying gas limit like this in the front end:

                onClick={createInstance == true ? async function () {
                  await createClone({
                    onSuccess: handleSuccess,
                    onError: (error) => console.log(error),
                    gasLimit: 6000000,
                  });

Is this the correct with to specify gasLimit?

#11

I am not sure about that syntax, when it works in hardhat, what is the total gas cost for that transaction?

#12

gas cost is 0.09 Matic. I’m pretty sure the issue is I have to explicitly mention the gasLimit. I remember this failing on hardhat as well until I mentioned the gasLimit.

#13

can you also try to specify the gas cost?

#14

I’ve tried, it didn’t work. Is there a way to use ethers syntax?

#15

you can use ethers syntax directly, you don’t have to use uweWeb3Contract

#16

and how do I make that work with a button? Do I put that all inside a const?

#17

I’m not expert in react, I guess that you add a callback function to a button and you call it

1 Like
#18

One more question, what provider do I use if I’m using ConnectButton from web3uikit?

#19

I don’t know this, there has to be a way to get access to ethers provider, like ethers = await Moralis.enableWeb3() was the syntax in vanilla js

#20

Hey @cryptokid,

I turned on ‘manual gas limit’ in advanced settings of metamask and when I set it to 6000000 the function worked. However, now I’m wondering how to do this via Moralis. I know you said I could use ethers directly, and I looked at the web3provider section of the docs, however that gave me some errors. This was my code:

const create = async function () {

address = “<address>”

const ethers = Moralis.web3Library; 
const web3Provider = await Moralis.enableWeb3(); 
const gasPrice = await web3Provider.getGasPrice();
const signer = web3Provider.getSigner();
const contract = new ethers.Contract(address, whoopyAbi, signer);

const transaction = await contract.deposit({
	
value: Moralis.Units.ETH('1'),

gasLimit: 100000000,

gasPrice: gasPrice,

});

await transaction.wait();

}

When I use this, I get the invalid address or ENS name error.

Do you have any recommendations on how I can go about this?
Thanks!