If the current source zaddr has X funds and a user inputs Y which is larger than X, we can immediately give some red text (like when things are unconfirmed) and tell them to choose a different address, perhaps highlight the address in red. We can also disable the send button and prevent them from losing their memo field, which is not currently preserved when this error happens.
If the current source zaddr has X funds and a user inputs Y which is larger than X, we can immediately give some red text (like when things are unconfirmed) and tell them to choose a different address, perhaps highlight the address in red. We can also disable the send button and prevent them from losing their memo field, which is not currently preserved when this error happens.