| 摘要 |
The invention concerns a method of updating, by a mobile device (106), the value of a digital voucher having an initial value, comprising: receiving, by said mobile device from a remote server (102), said digital voucher having said initial value; receiving, by a processing unit of said mobile device, at least one input parameter; calculating, by said processing unit, a new value of said digital voucher based on said at least one input parameter; and displaying said new value on a display of said mobile device.
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