| 摘要 |
Initial presentation of a payment device to a payment terminal assembly, in connection with a putative transaction, is facilitated. The payment device includes a payment device memory storing a device-side payment application, with an on-device balance, and at least one payment device processor coupled to the payment device memory. The payment terminal assembly includes a terminal memory, storing a terminal-side payment application, and at least one terminal processor coupled to the terminal memory. A first command is sent from the payment terminal assembly to the payment device to compute a cryptogram to complete the putative transaction. It is detected that the cryptogram is not received as expected. In response, an identifier of the payment device and transaction recovery data associated with the putative transaction are stored in a storage area of the terminal memory. The payment terminal assembly obtains the identifier of the payment device, upon re-presentation of the payment device to the payment terminal assembly. Upon the re-presentation of the payment device to the payment terminal assembly, the payment terminal assembly compares the obtained identifier of the payment device to contents of the storage area. Conditioned at least upon the comparing yielding a match, a second command is sent from the payment terminal assembly to the payment device. The second command instructs the payment device to re-produce the cryptogram to complete the putative transaction.
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