how to estimate fee of a transaction?
All we can do is look at historic transactions and compare. It’s not a lot, and it depends on size / actions.
For smart contracts the fee model isn’t final / published, so we need to wait a bit longer.
As Jazzer stated, it depends on the size of the tx plus there are certain fees for particular functions. The current fee schedule for Olympia can be found here: Olympia tx Fees
