Abstract: A method including receiving a unique identifier for a user. The method also can include determining, using a wallet directory, a shared wallet associated with the unique identifier. The shared wallet can include identifying information for cards issued from multiple different issuers. The method additionally can include sending the identifying information for the cards to enable the user to select one of the cards for a first transaction at a first merchant. The method further can include obtaining information about a first selected card of the cards based on a selection from the user. The method additionally can include requesting a first payment authorization token for the first selected card from a wallet network system. The method further can include sending the first payment authorization token to enable the first merchant to process the first transaction using the first selected card. Other embodiments of related systems and methods are described.

Abstract: A method including obtaining a unique identifier for a user. The method also can include causing an authentication code to be sent to a device of the user. The method additionally can include receiving, through a first user interface displayed to the user, the authentication code. The method further can include displaying, to the user through the first user interface, a list of cards in a shared wallet for the user. The cards can be issued from multiple different issuers. The shared wallet can be accessible to multiple different merchants. The method additionally can include receiving, through the first user interface displayed to the user, a selection from the user of a selected card from the list of the cards for processing a transaction. The method further can include providing card information for the selected card to a merchant for processing the transaction. Other embodiments of related systems and methods are described.

Abstract: Data state rollover is performed based on data state snapshots and deltas. A series of snapshots is taken of the current data state, an original data state, and data states in between. Deltas are then generated between two sequential snapshots. This results in numerous deltas which represent the difference between consecutive snapshots. Once the deltas are acquired, the deltas may be stored along with the snapshot of the present data state. As such, previous data states may be rolled back to by determining the number of deltas to apply to the current data state to achieve the desired previous data state. In cases where the rollback or rollover fails, deltas may be played against the current data state to a point where the last known trusted and working data point existed.

Abstract: Data state rollover is performed based on data state snapshots and deltas. A series of snapshots is taken of the current data state, an original data state, and data states in between. Deltas are then generated between two sequential snapshots. This results in numerous deltas which represent the difference between consecutive snapshots. Once the deltas are acquired, the deltas may be stored along with the snapshot of the present data state. As such, previous data states may be rolled back to by determining the number of deltas to apply to the current data state to achieve the desired previous data state. In cases where the rollback or rollover fails, deltas may be played against the current data state to a point where the last known trusted and working data point existed.

Abstract: Data state rollover is performed based on data state snapshots and deltas. A series of snapshots is taken of the current data state, an original data state, and data states in between. Deltas are then generated between two sequential snapshots. This results in numerous deltas which represent the difference between consecutive snapshots. Once the deltas are acquired, the deltas may be stored along with the snapshot of the present data state. As such, previous data states may be rolled back to by determining the number of deltas to apply to the current data state to achieve the desired previous data state. In cases where the rollback or rollover fails, deltas may be played against the current data state to a point where the last known trusted and working data point existed.