Way to estimate gas before execute

[Nafidinara]

Problem

Hello, is there any way to calculate gas in Hashgraph SDK like in web3js?

web:

myContract.methods.SetMessage(_message)
    .estimateGas(
        {
            from: _from,
            gasPrice: _gasPrice
        }, function(error, estimatedGas) {
        }
    )
});

I want to implement here,
hashgraph:

const contractExecTx = new ContractExecuteTransaction()
            .setContractId(contractId) 
            .setGas(300000) // I want to estimate the gas value to put here
            .setPayableAmount(payableAmount)
            .setFunction(method, functionParams);

Solution

• add estimate gas method

Alternatives

No response

[ivaylonikolov7]

If I understood you correctly, we are currently working on this functionality. You can check it here - #2670. It will be released in the next stable version which is going to be somewhere in the beginning of January.

There is a way for you to get the exact gas cost by sending a POST request to Mirror Node but I would highly recommend you to wait for our next stable release which is going to make your job much easier and you wouldn't have to deal with any issues you may find if you try to implement it yourself.