Buying: The exchange rate is locked at the moment Aureo detects your SPEI deposit. The rate shown on the Buy Bitcoin page is an estimate only.
Selling: The exchange rate is locked when you tap Continue to payment. With Lightning, the invoice is valid for 5 minutes. With Bitcoin (on-chain), you have 15 minutes to send the transaction. If the time runs out, refresh the order to get a new rate. If your Bitcoin (on-chain) transaction arrives late or with a fee below the minimum, Aureo sets the rate at the first confirmation.
How exchange rates work
When rates lock and how they are determined.
Written by Tristan
