How can I use EstimateGasAsync? help.

[ycc3000]

dear,
I use below code, but got 'TransferHelper: TRANSFER_FROM_FAILED', if I set AmountToSend then I got 'execution reverted: eth_estimateGas'.
var func = new SwapExactTokensForTokensSupportingFeeOnTransferTokensFunction { AmountIn = amountIn, AmountOutMin = amountOutMin, Path = path, To = to, Deadline = deadline }; func.AmountToSend = 10000; var estimate = await uniswapV2Router02.ContractHandler.EstimateGasAsync(func);

[juanfranblanco]

There is a problem with your data input, hence is failing both to estimate and execute the transaction. The error is returned by the smart contract.

[juanfranblanco]

There is a problem with your data input, hence is failing both to estimate and execute the transaction

Also you are also setting the AmountToSend, check the Uniswap V2 V3 repository for an example.

[ycc3000]

thank you very much, and do you mean Nethereum.Uniswap V2 and V3?
I use var estimate = await _web3.TransactionManager.EstimateGasAsync(new CallInput { From = to }); and it works but always got 53000 :(