LOYALTY REWARDS IN OFFLINE PAYMENT SYSTEM

The invention provides a method for redeeming rewards during an offline payment transaction. Once a user reaches a reward threshold, a reward certificate is transmitted to a merchant device by an account system. The user initiates a payment transaction when the devices are without network access to the account system. The user device transmits a withdrawal record, a transaction history, a reward redemption history, and an identification to the merchant device. The merchant device determines whether the user has an available reward, whether additional funds are required to process the offline payment transaction, and whether the user device has a sufficient balance to complete the offline payment transaction. The merchant device prepares a withdrawal record, writes it to the user device, and saves it until the merchant device has network access. When the merchant device has network access, it transmits the withdrawal record and transaction history to the account system. 本发明提供种用于在离线支付交易期间兑换奖励的方法。旦用户达到奖励阈值，通过账户系