Calculating the Fee Amount Before Transfer

[emin-karadag]

Hello,
I am using Thirdweb [v2.22.0] version. I have a question for you.

I wrote the code that transfers tokens on various networks such as Binance Smart Chain, Avalanche, Polygon. However, I want to do something like this: Before making a token transfer, I want to calculate the network fee to be spent for that transfer.

If there is a method where I can get the approximate network fee to be spent for that token transfer as AVAX in the Avalanche network and as BNB in the BSC network, can you show it with an example code?
Thank you.

[linear]

TOOL-4878 Calculating the Fee Amount Before Transfer

[0xFirekeeper]

You can use ThirdwebContract.Prepare or the low level ThirdwebTransaction.Create which returns a ThirdwebTransaction with methods to estimate gas costs!

[emin-karadag]

Hello @0xFirekeeper ,
I want to do it using ThirdwebTransaction.Create. For this I need to pass txInput as a parameter, which corresponds to the ThirdwebTransactionInput class.

I need to pass 3 parameters to ThirdwebTransactionInput: To, Data, Value.
I understand the To and Value fields, but what is the Data field? How should I fill it? I could not continue because I could not find this information in the document.

Link 1: https://portal.thirdweb.com/dotnet/wallets/actions/executetransaction#thirdwebtransactioninput
Link 2: https://portal.thirdweb.com/dotnet/wallets/actions/sendtransaction#thirdwebtransactioninput

[0xFirekeeper]

The data is what gets executed onchain, if you are doing a native transfer (ETH) you can ignore it or use "0x"
If you are making an ERC20 token transfer, you can use yourErc20Contract.Prepare("transfer", ...); as per the IERC20 interface