Dollaire will use fastFOREX API calls in order to determine in real-time the conversion rate between currencies. API calls will be made hourly in order to keep information relatively up-to-date while showing the user a time stamp of the last time the price was updated. This is done to minimize overhead costs by limiting API calls.
When the user decides that they want to start the conversion process, a new API call will be made to show the user the most recent price. After inputting information for the conversion order and pressing submit, one last API call will be made showing the final price. The user will be given a few seconds to accept the conversion. If they do not accept they are free to press submit again with a fresh API call for the updated price.
Each time that one of these conversion rates are updated during a conversion, the system will take that information and update it for all users. This way the most used currency prices will be as recent as possible.
