[FEATURE Request] Send whole UTXO

[jodobear]

Problem Statement

I want to send a UTXO without having to calculate the fees and having to enter the exact amount to send less fees.

Current Behaviour

I have to manually enter an amount then check the error message for the amount of sats more required to send the UTXO. Then calculate the exact amount to enter into the send field.

Proposed Solution

In the Advance Options when you select the coin have an option to send the whole coin and when you are back in the Send screen, you select the Fee and the app first reduces the fee from the UTXO and sends the rest of it to the recipient.

[i5hi]

drainUtxo(s) is actually a pretty useful feature.

We could have in Advanced Options Drain Selected Utxos IF the user has selected coins manually - this will remove the amount field (similar to drainWallet) and calculate the absolute fees based on fee_rate*num_utxos_selected - subtract that from the total value of the utxos and set that as the amount to send.