Unable to determine send amount to empty wallet

[cdelargy]

Use case: User has a wallet they would like to empty before creating a new wallet on the device. The only viable approach to send all funds in a single transaction is to over-estimate the fee, cancel the resulting transaction and viewing the fee suggested, then manually calculating a send amount. This is prone to errors and might make it difficult to clean out a wallet with change in it.

[jonasschnelli]

Agree that this is not ideal right now.
I think a function to sweep the wallet to an address or something similar to Bitcoin-Cores subtractFeeFromAmount would be nice.