Calling the contract prompts an error that the gas cannot be estimated

[yjjdick]

Here is the method to call
`try {
const config = await prepareWriteContract({
address: myRouterContractAddr,
abi: require("@/abi/fengshu.json"),
functionName: 'fastSell',
args: [pancakeContractAddr, _this.tokenContractAddr, lpContractChecksumAddr, exchangeAmount],
})
const data = await writeContract(config)
this.successHash = data.hash
let hash = data.hash
const waitdata = await waitForTransaction({
hash
})

    if (waitdata.status == 0 || !waitdata.status) {
      _this.txStatus = 0
    } else {
      _this.txStatus = 1
    }
    if (_this.txStatus == 0) {
      $("#modal-danger").modal("show");
    } else {
      $("#modal-success").modal("show");
      _this.getTokenBalance()
    }

  } catch (e) {
    console.error(e)
    if (e.message.indexOf("User rejected request") > -1) {
      Toast.warning("操作取消")
      return
    }

    _this.trySellMsg = e.message
  }`

Please tell me how to modify this code to solve the problem of error

[jxom]

Hard to tell what is going on from that code snippet. Can you please provide a minimal reproducible example via a CodeSandbox or a separate repository so we can have a closer look?

[yjjdick]

Hard to tell what is going on from that code snippet. Can you please provide a minimal reproducible example via a CodeSandbox or a separate repository so we can have a closer look?
This error is not inevitable, it only appears occasionally. The error roughly means that the gas limit cannot be estimated when I call the contract and needs to be set manually. Can you tell me how to manually set the gas limit when calling the contract with wagmi?

[daniserrano7]

I just had the same issue and managed to solve it by manually setting gasLimit this way:

const { config: presaleConfig } = usePrepareContractWrite({
  address: CONTRACT_ADDRESS,
  abi: cryptoDevsABI,
  functionName: "presaleMint",
  overrides: {
    value: ethers.utils.parseEther("0.005"),
    gasLimit: BigNumber.from(2100000),
  },
});

 const {
  data: presaleWritingData,
  isLoading: isPresaleWritingLoading,
  isSuccess: isPresaleSuccess,
  write: writePresale,
  isError: isPresaleError,
} = useContractWrite(presaleConfig);

Check out the overrides param in usePrepareContractWrite. Hope it helps!