How to define (calculate) fee parameter for transfer?

Question

Is there a way to calculate the transaction (transfer) fee only with RPC or eztz.js lib? Either, the only the user can define this parameter?

I used only gas price for eth likeness blockchains before to estimate fees.

Answer 1

You can use taquito for this. (https://tezostaquito.io/docs/estimate)

Operation cost for invoking smart contract