Enhancement (feature) request: Allow custom fee

[mattbourke]

I discussed this on Twitter with Brian.
I mentioned I'd raise a ticket.
It would be good to allow a user to enter a custom fee, most of the time when I buy things with Bitcoin I don't need them instantly, especially physical goods, I place an order and go to bed, by the time I wake the seller has received a payment.
Anyway, I can send a payment for a few cents manually from my wallet, but OB will set minimum fee as 20x what I know works.
So my suggestion is a little "add custom fee" link that shows a hidden div with custom fee, or simply sets the current fee text to be a textbox that is editable etc.

[rmisio]

This would also require changes on the server. The spend api would need to allow a custom fee to be passed in.

[jlopp]

Bump; when spending from an OB wallet my own use case is that I'm sending to cold storage, so the time preference is really low for confirmation. OB seems to be using a 1 or 2 block fee estimate which is far overpaying what I need.