Patent Publication Number: US-11665254-B2

Title: Real-time generation and provisioning of contextual notification data to network connected devices

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application is a continuation of, and claims the benefit of priority to, U.S. application Ser. No. 15/725,598, filed Oct. 5, 2017, the disclosure of which is incorporated by reference herein to its entirety. 
    
    
     TECHNICAL FIELD 
     The disclosed embodiments generally relate to computer-implemented systems and processes that automatically generate and provision contextually relevant notifications to network-connected devices. 
     BACKGROUND 
     Today, payment systems and related technologies continuously evolve in response to advances in payment instruments, such as the ongoing transition from physical transaction cards to digital payment instruments maintained on mobile devices. These innovations result in additional mechanisms for submitting payment to an electronic or physical merchant and for flexibly funding transactions initiated by the electronic or physical merchant. These innovations also extend beyond the capabilities of many transaction-based messaging services, which provide delayed transactional notifications through out-of-band communications. 
     SUMMARY 
     In some embodiments, an apparatus includes a communications unit, a storage unit storing instructions, and at least one processor coupled to the communications unit and the storage unit. The at least one processor is configured to execute the instructions to receive a first signal via the communications unit. The first signal includes information indicative of an authorized data exchange involving a terminal device and a client device, and the information includes a value of a parameter that characterizes the authorized data exchange. The at least one processor is further configured to execute the instructions to identify and load data specifying a notification template from the storage unit, and generate notification data in accordance with the notification template. The notification data is populated with a portion of the received information. The at least one processor is also configured to execute the instructions to transmit a second signal via the communications unit to the client device. The second signal includes the notification data, and the second signal is transmitted through a programmatic interface associated with an application program executed by the client device. The client device is configured to display the notification data on a corresponding interface. 
     In further embodiments, a computer-implemented method includes receiving, by at least one processor, a first signal comprising information indicative of an authorized data exchange involving a terminal device and a client device. The information includes a value of a parameter that characterizes the authorized data exchange. The computer-implemented method further includes identifying and loading, by the at least one processor, data specifying a notification template from a storage unit, and generating, by the at least one processor, notification data in accordance with the notification template. The notification data is populated with a portion of the received information. The computer-implemented method also includes transmitting, by the at least one processor, a second signal to the client device. The second signal includes the notification data, and the second signal is transmitted through a programmatic interface associated with an application program executed by the client device. The client device is configured to display the notification data on a corresponding interface. 
     Additionally, in some embodiments, a tangible, non-transitory computer-readable medium stores instructions that, when executed by at least one processor, perform a method that includes receiving a first signal comprising information indicative of an authorized data exchange involving a terminal device and a client device. The information includes a value of a parameter that characterizes the authorized data exchange. The method further includes identifying and loading data specifying a notification template from a storage unit, and generating notification data in accordance with the notification template. The notification data is populated with a portion of the received information. The method also includes transmitting a second signal to the client device. The second signal includes the notification data, and the second signal is transmitted through a programmatic interface associated with an application program executed by the client device. The client device is configured to display the notification data on a corresponding interface. 
     It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed. Further, the accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate aspects of the present disclosure and together with the description, serve to explain principles of the disclosed embodiments as set forth in the accompanying claims. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    is a diagram of an exemplary computing environment, consistent with disclosed embodiments. 
         FIGS.  2 A- 2 D,  3 A, and  3 B  are diagrams illustrating portions of an exemplary computing environment, consistent with the disclosed embodiments. 
         FIGS.  3 C and  3 D  are diagrams illustrating portions of exemplary notification template data, in accordance with disclosed embodiments. 
         FIGS.  4  and  5    are diagrams illustrating portions of an exemplary computing environment, consistent with the disclosed embodiments. 
         FIG.  6    is a flowchart of exemplary processes for generating notifications of contextual and temporal relevance to authorized exchanges of data, in accordance with the disclosed embodiments. 
     
    
    
     DETAILED DESCRIPTION 
     Reference will now be made in detail to the disclosed embodiments, examples of which are illustrated in the accompanying drawings. The same reference numbers in the drawings and this disclosure are intended to refer to the same or like elements, components, and/or parts. 
     In this application, the use of the singular includes the plural unless specifically stated otherwise. In this application, the use of “or” means “and/or” unless stated otherwise. Furthermore, the use of the term “including,” as well as other forms such as “includes” and “included,” is not limiting. In addition, terms such as “element” or “component” encompass both elements and components comprising one unit, and elements and components that comprise more than one subunit, unless specifically stated otherwise. Additionally, the section headings used herein are for organizational purposes only, and are not to be construed as limiting the described subject matter. 
     This specification describes exemplary computer-implemented apparatuses, devices, and processes that, among other things, perform operations that initiate, approve, and execute exchanges of data between network-connected devices operating in a computing environment. Further, and as described below, these exemplary apparatus, devices, and process can also perform operations that generate and distribute, directly to the network-connected devices through corresponding programmatic interfaces, notifications of contextual and temporal relevance to the executed data exchanges. 
     In certain aspects, as described below, a client device operating within the computing environment may establish communications with a terminal device across a direct channel of communication. The client device may locally store an application program within one or more tangible, non-transitory memories, and the application program, when executed by the client device, may cause the client device to initiate an exchange of data with the terminal device across the direct communications channel. By way of example, the initiated data exchange may be characterized by a value of one or more data exchange parameters, and the client device may transmit, across the direct communications channel to the terminal device, information that characterizes a data type available for use in the initiated data exchange and information that identifies the client device or the executed application program. The available data type may, in some instances, be provisioned to the client device for use in exchanges of data initiated by the executed application. 
     The terminal device may receive the information transmitted by the client device and in some aspects, may perform operations that package the received information, along with additional or alternate information characterizing the initiated data exchange (e.g., the value of the one or more data-exchange parameters or information identifying the terminal device), into an authorization request. In some instances, described herein, the terminal device may perform operations that selectively encrypt portions of the packaged information to generate a cryptographically secure representation of the authorization request. In additional instances, the terminal device (or alternatively, the client device) may also selectively tokenize sensitive portions of the packaged information and generate a tokenized authorization request that is less sensitive to exploitation by malicious third parties. 
     In some aspects, as described herein, the terminal device may transmit the cryptographically secure and/or tokenized authorization request a computing system associated with the client device, e.g., directly across an appropriate communications network or indirectly through one or more intermediate devices or communications systems across the communications network. For example, the computing system may be associated with available data type, and upon execution of stored software instructions, the computing system may perform any of the exemplary processes described herein to authorize a performance of the initiated data exchange in accordance with the values of the one or more data-exchange parameters and using the available data type. The computing system may, in some instances, generate and transmit data that confirms the authorization of the performance of the initiated data exchange to the terminal device, e.g., directly across the communications network or indirectly through one or more intermediate devices or communications systems. 
     Further, and in response to the authorization of the initiated data exchange, the computing system may perform additional operations that generate and transmit data characterizing a context of the authorized data exchange to an additional computing system operating within the computing environment across a secure communications channel, e.g., through a secure application-to-application handshake or through a corresponding programmatic interface. By way of example, the contextual data may include, but is not limited to, data identifying or characterizing the client device (or the executed application program), data identifying or characterizing the terminal device, or a value of one or more parameters that characterize the initiated and authorized data exchange. 
     In some instances, the additional computing system may receive the contextual data, and perform operations that generate a template-based notification of contextual and temporal relevance to the authorized data exchange. The notification may, for example, include at least a portion of the received contextual data, along with additional data characterizing the device, the terminal device, and/or the authorized data exchange. Further, in some instances, the additional computing system may perform operations that establish a communications channel with the device, e.g., through a secure application-to-application handshake or through a corresponding programmatic interface, and transmit the notification to the device across the secure communications channel. As described herein, the notification may include data that instructs the device to render and present graphical, textual, or audible content representative of the context of the authorized data exchange on a corresponding interface. 
     In one example, the terminal device may correspond to a network-connected point-of-sale (POS) terminal associated with a merchant, and the initiated data exchange may facilitate an approval and an execution of a transaction initiated at terminal device by the computing system based on funds allocated to a payment instrument of a customer that participates in the initiated transaction. Additionally, in some aspects, the computer system may correspond to a network-connected computing system maintained by a financial institution that issues the payment instrument, may provide an approval of that initiated transaction to the POS terminal using any of the processes described herein. 
     The initiated transaction may, in some instances, correspond to a purchase transaction in which the customer purchases a good or service from the merchant at an agreed-upon price (e.g., a transaction amount), and the parameter values charactering the initiated purchase transaction may include, but are not limited to, the transaction amount, data identifying the customer or the merchant, data identifying the purchased good or service, or a time or date associated with the initiated purchase transaction. Further, the customer may operate the client device, and in response to input provided to the client device by the customer (e.g., through a corresponding input unit), the executed application program may cause the client device to transmit data identifying the payment instrument (e.g., as provisioned to the client device) to the POS terminal across the direct communications channel. In some example, the payment instrument can include, but is not limited to, a credit or debit card accounts held by the customer and issued by one or more financial institutions (e.g., issuers), a checking or savings account held by the customer at one or more financial institutions, an electronic funds transfer (e.g., e-transfers), and other accounts held by or available to the customer and capable of funding the purchase transaction. 
     Certain of the exemplary, computer-implemented processes described herein, which generate template-based notifications of relevance to data exchanges initiated between a client device and a terminal device, and which provide the generated contextual notifications to the client device through secure application-to-application communication, may be implemented in addition to or as an alternate to conventional notification and messaging processes, such as those that provide notifications to the client device via email, text messaging, or other out-of-application communications channels. By facilitating post-transaction messaging through secure, application-to-application programmatic channels established by application-specific computing systems, certain of the disclosed embodiments may reduce the computational load on computer systems maintained by payment networks and issuers of payment instruments and further, reduce a potential exploitation of the contextual notifications by malicious third parties operating within the computing environment. 
     Further, in some examples, the client device may be configured by the executed application program to establish simultaneously secure communications channels with the terminal device, e.g., to initiate the data exchange with the terminal device, and with the additional computing system, e.g., to receive contextual notification data relevant to the initiated data exchanges. As described in greater detail below, and subsequent to the initiation of the purchase transaction with the terminal device, the client device may also be configured to provide data that identifies the customer and/or the merchant to the additional computing system across the securely established communications channel prior to the authorization of the initiated purchase transaction. 
     Certain of these additional computer-implemented processes, as described herein, enable the additional computing system to access or generate a notification template in parallel with the authorization of the initiated purchase transaction, and to provide a contextual notification based on the notification template to the client device in real time and contemporaneously with the authorization of the initiated purchase transaction. These exemplary computer-implemented processes may, in some aspects, be implemented in addition to or as an alternate to conventional notification and messaging processes, which provide contextual messaging to customers subsequent to an authorization of a corresponding purchase transaction, and may increase a speed and efficiency at which network-connected computing systems generate and provide contextual messaging to client device when compared to conventional notification and messaging processes, as described below. 
     I. Exemplary Computing Environments 
       FIG.  1    is a diagram illustrating an exemplary computing environment  100 , consistent with certain disclosed embodiments. As illustrated in  FIG.  1   , environment  100  may include a client device  102 , a point-of-sale (POS) terminal  122 , an acquirer system  130 , a payment network system  140 , an issuer system  160 , a tokenization system  170 , and a contextual notification system  180 , each of which may be interconnected to through any appropriate combination of communications networks, such as network  120 . Examples of network  120  include, but are not limited to, a wireless local area network (LAN), e.g., a “Wi-Fi” network, a network utilizing radio-frequency (RF) communication protocols, a Near Field Communication (NFC) network, a wireless Metropolitan Area Network (MAN) connecting multiple wireless LANs, and a wide area network (WAN), e.g., the Internet. 
     Further, as illustrated in  FIG.  1   , client device  102  and POS terminal  122  may also exchange data across a direct channel of communications, e.g., direct communication channel  120 A. In one aspect, direct communications channel  120 A may correspond to a wireless communications channel established across a short-range communications network, examples of which include, but are not limited to, a wireless LAN, e.g., a “Wi-Fi” network, a network utilizing RF communication protocols, a NFC network, a network utilizing optical communication protocols, e.g., infrared (IR) communications protocols, and any additional or alternate communications network, such as those described above, that facilitate peer-to-peer (P2P) communication between POS terminal  122  and client device  102 . 
     POS terminal  122  may, in some instances, be associated with a merchant, e.g., merchant  121 , and client device  102  may be associated with or operated by a customer of merchant  121 , e.g., user  101 . For example, POS terminal  122  may be disposed within a physical location of merchant  121 , such as a location where a customer, e.g., user  101 , provides payment for goods and/or services (e.g., at a cash register at merchant  121 ). In one aspect, client device  102  may correspond to a consumer payment device that, upon establishing communication with POS terminal  122  across communications channel  120 A, provides data to POS terminal  122  specifying a payment instrument available for use in an initiated transaction for the goods and/or services. 
     The payment instrument may, in some instances, be issued to user  101  by a financial institution, e.g., a financial institution that operates issuer system  160 , and issuer system  160  may perform operations that provide the executable payment application to client device  102  for storage within the one or more tangible, non-transitory memories. Payment instruments consistent with the disclosed embodiments include, but are not limited to, a credit or debit card accounts held by user  101 , an account that includes units of one or more digital currencies held by user  101 , a checking or savings account held by user  101  at one or more financial institutions, an electronic funds transfer, and/or other accounts held by or available to user  101  and capable of funding purchase transaction initiated at POS terminal devices operating within environment  100 , such as POS terminal  122 . 
     In an embodiment, client device  102  may include a computing device having one or more tangible, non-transitory memories that store data and/or software instructions, and one or more processors, e.g., processor  104 , configured to execute the software instructions. The one or more tangible, non-transitory memories may, in some aspects, store software applications, application modules, and other elements of code executable by the one or more processors, such as a web browser, an application associated with issuer system  160  (e.g., a mobile application), and additionally or alternatively, a payment application associated with a payment service (e.g., a mobile application that establishes and maintains a mobile wallet), as described below. 
     Client device  102  may also establish and maintain, within the one or more tangible, non-tangible memories, one or more structured or unstructured data repositories or databases, e.g., data repository  106 , that include device data  108  and payment application data  110 . In one instance, device data  108  may include data that uniquely identifies client device  102 , such as a media access control (MAC) address of client device  102  or an IP address assigned to client device  102 . 
     Further, in additional instances, payment-application data  110  may include one or more identifiers of the payment application (e.g., a wallet address assigned to the mobile wallet established and maintained by the executed payment application), data identifying one or more payment instruments available to the executed payment application (e.g., tokenized data or cryptograms representative of the payment instruments provisioned to the established mobile wallet), and additional data supporting an operation of the executed payment application (e.g., a mobile wallet cryptogram provided to POS terminal  122  to validate the established mobile wallet, etc.). The disclosed embodiments are, however, not limited to these examples of device and payment-application data, and in further aspects, data repository  106  may include any additional or alternate data appropriate to client device  102  and the executed payment application. 
     Referring back to  FIG.  1   , client device  102  may also include a display unit  112 A configured to present interface elements to user  101 , and an input unit  112 B configured to receive input from user  101 , e.g., in response to the interface elements presented through display unit  112 A. By way of example, display unit  112 A may include, but is not limited to, an LCD display unit or other appropriate type of display unit, and input device  112 B may include, but input not limited to, a keypad, keyboard, touchscreen, voice activated control technologies, or appropriate type of input device. Further, in additional aspects (not depicted in  FIG.  1   ), the functionalities of display unit  112 A and input unit  112 B may be combined into a single device, e.g., a pressure-sensitive touchscreen display unit that presents interface elements and receives input from user  101 . Client device  102  may also include a communications unit  112 C, such as a wireless transceiver device, coupled to processor  104  and configured by processor  104  to establish and maintain communications with network  120  using any of the communications protocols described herein. 
     Further, in some aspects, client device  102  may include an interface unit  114 , which can be configured by processor  104  to establish and maintain communications with POS terminal  122  (e.g., through interface unit  128  of  FIG.  1   ) across communications channel  120 A. For example, each of interface unit  114  and interface unit  128  may include a communications device, e.g., a wireless transceiver device, capable of exchanging data across communications channel  120 A using any of the short-range communications protocols described above (e.g., NFC protocols, RF communications protocols, Bluetooth™ communication protocols, optical communications protocols, etc.). In other examples, interface unit  114  may include one or more electrical connectors capable of engaging with corresponding electrical connectors of interface unit  128  of POS terminal  122 , or an electrical connector capable receiving a wired connection with POS terminal  122  (e.g., a USB connector, etc.). 
     Examples of client device  102  may include, but are not limited to, a personal computer, a laptop computer, a tablet computer, a notebook computer, a hand-held computer, a personal digital assistant, a portable navigation device, a mobile phone, a smart phone, a wearable computing device (e.g., a smart watch, a wearable activity monitor, wearable smart jewelry, and glasses and other optical devices that include optical head-mounted displays (OHMDs), an embedded computing device (e.g., in communication with a smart textile or electronic fabric), and any other type of computing device that may be configured to store data and software instructions, execute software instructions to perform operations, and/or display information on an interface module, consistent with disclosed embodiments. In some instances, user  101  may operate client device  102  and may do so to cause client device  102  to perform one or more operations consistent with the disclosed embodiments. 
     POS terminal  122  may correspond to a computing device that includes one or more tangible, non-transitory memories storing data and/or software instructions, and one or more processors, e.g., processor  124 , configured to execute the software instructions. The one or more tangible, non-transitory memories may, in some aspects, store software applications, application modules, and other elements of code, which when executed by the one or more processors, cause POS terminal  122  to perform operations consistent with the disclosed embodiments, as described below. Further, in certain aspects, POS terminal  122  may also store and maintain a data repository, e.g., data repository  126 , within the one or more tangible, non-transitory memories. Data repository  126  may, for example, include terminal data  126 A that uniquely identifies POS terminal  122  within network  120 , a transaction log  126 B that identifies transactions initiated at POS terminal  122  and authorized using any of the exemplary processes described herein, and/or acquirer data  126 C that uniquely identifies a computer system (e.g., a MAC address, an IP address, etc.) of an entity, e.g., an acquirer, that administers POS terminal  122  and other POS terminals operating in environment  100 . 
     As described above, POS terminal  122  may be disposed within a physical location of the merchant, such as a location where a customer, such as user  101 , may provide payment for goods and/or services (e.g., at a cash register at the merchant). POS terminal  122  may, in some instances, include a display unit  127 A configured to present interface elements to user  101 , and an input unit  127 B configured to receive input from user  101 , e.g., in response to the interface elements presented through display unit  127 A. By way of example, display unit  127 A may include, but is not limited to, an LCD display unit or other appropriate type of display unit, and input device  127 B may include, but input not limited to, a keypad, keyboard, touchscreen, voice activated control technologies, or appropriate type of input device. Further, in additional aspects (not depicted in  FIG.  1   ), the functionalities of display unit  127 A and input unit  127 B may be combined into a single device, e.g., a pressure-sensitive touchscreen display unit that presents interface elements and receives input from user  101 . 
     POS terminal  122  may also include a communications unit  127 C, such as a wireless transceiver device, coupled to processor  124  and configured by processor  124  to establish and maintain communications with network  120  using any of the communications protocols described herein. Further, POS terminal  122  may include an interface unit  128 , which may be configured by processor  124  to establish and maintain communications with client device  102  (e.g., through interface unit  114  of  FIG.  1   ) across communications channel  120 A. In some aspects, interface unit  128  may include a communications device, such as a wireless transceiver device, capable of exchanging data with client device  102  using any of the short-range communications protocols described above (e.g., NFC protocols, RF communications protocols, Bluetooth™ communication protocols, optical communications protocols, etc.). 
     Examples of POS terminal  122  may include, but are not limited to, a personal computer, a laptop computer, a tablet computer, a notebook computer, a hand-held computer, a personal digital assistant, a portable navigation device, a mobile phone, a smart phone, a wearable computing device (e.g., a smart watch, a wearable activity monitor, wearable smart jewelry, and glasses and other optical devices that include optical head-mounted displays (OHMDs), an embedded computing device (e.g., in communication with a smart textile or electronic fabric), and any other type of computing device that may be configured to store data and software instructions, execute software instructions to perform operations consistent with disclosed embodiments. Further, although not depicted in  FIG.  1   , POS terminal  122  may also be coupled to a computing system associated with and maintained by merchant  121  (e.g., a cash register, etc.), which may include one more processors and one of more tangible, non-transitory memories storing one or more software applications, application modules, and other elements of code that, when executed by the one or more processors, cause the merchant computing system to exchange data with POS terminal  122  and perform operations consistent with the disclosed embodiments. 
     The disclosed embodiments are not limited to such POS terminals, and in additional aspects, POS terminal  122  may correspond to one or more application program modules executed by a computer system maintained by merchant  111 , one or more computing systems operating within environment  100 , one or more client devices operating within environment  100 , such as client device  102 . In other embodiments, POS terminal  122  may represent a device communicatively coupled to client device  102  to provide mobile point-of-sale and payment services, such as a Square™ device in communication with client device  102 . 
     Referring back to  FIG.  1   , acquirer system  130 , payment network system  140 , acquirer system  160 , tokenization system  170 , and contextual notification system  180  may each represent a computing system that includes one or more servers (e.g., not depicted in  FIG.  1   ) and tangible, non-transitory memory devices storing executable code and application modules. Further, the servers may each include one or more processor-based computing devices, which may be configured to execute portions of the stored code or application modules to perform operations consistent with the disclosed embodiments, including operations consistent with the exemplary transaction authorization and real-time notification processes described herein. In other instances, and consistent with the disclosed embodiments, one or more of acquirer system  130 , payment network system  140 , acquirer system  160 , tokenization system  170 , and contextual notification system  180  may correspond to a distributed system that includes computing components distributed across one or more networks, such as network  120 , or other networks, such as those provided or maintained by cloud-service providers. 
     In some aspects, acquirer system  130  may perform operations that administer one or more POS terminal devices operating within environment  100 , such as POS terminal  122 . As illustrated in  FIG.  1   , acquirer system  130  may maintain, within the one or more tangible, non-transitory memories, POS terminal data  132  that identifies one or more of the POS terminal devices administered by acquirer system  130  (e.g., an IP address, MAC address, or other unique device identifier of POS terminal  122 ), and payment network data  134  that identifies one or more payment networks capable of clearing and settling purchase transaction initiated by POS terminals administered by acquirer system  130  (e.g., an IP address or other network identifier of payment network system  140 ). 
     Payment network system  140  may perform operations that clear and settle authorized purchase transactions in using one or more exemplary purchase transaction clearance and settlement processes. In certain aspects, and to facilitate a performance of these exemplary clearance and settlement processes, payment network system  140  may maintain acquirer data  142 , issuer data  144 , and tokenization service provider (TSP) data  146  within the one or more tangible, non-transitory memories. Acquirer data  142  may include data that uniquely identifies one or more acquirer computing systems that administer POS terminals operating within environment  100  (e.g., an IP address, MAC address, or other unique device identifier of acquirer system  130  that administers POS terminal  122 ). Further, in some instances, issuer data  144  may include data that uniquely identifies computer systems maintained by one or more issuers of payment instruments involved in purchase transactions initiated at POS terminal  122  (e.g., an IP address, MAC address, or other unique identifier of issuer system  160 ). 
     In additional instances, TSP data  146  may include information that uniquely identifies a network-connected computing system associated with one or more tokenization service providers operating within environment  100 . For example, and as described herein, tokenization system  170  may provide tokenization services to payment network system  140  and additionally or alternatively, to issuer system  160 , and TSP data may include an IP address, a MAC address, or another unique identifier of tokenization system  170  within a corresponding communications network, such as network  120  or direct communications channel  121 B. 
     In some aspects, tokenization system  170  may, upon execution of stored software instructions, perform operations that provide tokenization services to payment network system  140  and additionally or alternatively, to issuer system  160 . For example, tokenization system  170  may be configured to receive encrypted or tokenized requests to authorize purchase transactions initiated at POS terminal  122  by client device  102  (e.g., from payment network system  140  or issuer system  160 ), and to process decrypt or detokenize the received authorization requests prior to authorization processing by issuer system  160 . 
     As illustrated in  FIG.  1   , and to facilitate the provision of these exemplary tokenization services, tokenization system  170  may maintain, within on or more tangible non-transitory memories, cryptographic data  172  and a token vault  174 . Cryptographic data  172  may, in some instances, specify one or more private, public, or symmetric cryptographic keys capable of decrypting one or more authorization requests selectively encrypted by POS terminal  122 . Further, in additional instances, token vault  174  may include structured data records that include tokenized data assigned to one or more payment instruments held by user  101  (and users of other client devices and payment devices operating within environment  100 ) and further, that associate the tokenized data with account numbers, expiration dates, card verification values, and other sensitive account data that facilitate an authorization, by issuer system  160 , of purchase transactions involving the payment instruments. 
     Issuer system  160  may maintain, within the one or more tangible, non-transitory memories, data that facilitates an authorization of purchase transactions initiated at POS terminal devices operating within environment  100  and involving issued payment instruments available to user  101 , e.g., as specified by data provided to POS terminal  122  by client device  102  across communications channel  120 A. For example, as illustrated in  FIG.  1   , issuer system  160  may maintain customer account data  162  that identifies underlying accounts (e.g., account numbers, expiration dates, card verification values, etc.) associated with each of the payment instruments issued by issuer system  160  and tokenization service provider (TSP) data  164  that identifies a network-connected computing system associated with one or more tokenization service providers operating within environment  100 . 
     By way of example, and for a corresponding one of the payment instruments (e.g., a Visa™ credit card held by user  101 ), customer account data  162  may include, but is not limited to, data identifying the Visa™ credit card (e.g., the account number, expiration data, card verification value, etc.), a current account balance, or values of other usage parameters of the Visa™ credit card. Further, and as described herein, tokenization system  170  may provide tokenization services to payment network system  140  and additionally or alternatively, to issuer system  160 , and TSP data may include an IP address, a MAC address, or another unique identifier of tokenization system  170  within a corresponding communications network, such as network  120  or direct communications channel  121 C. 
     Further, issuer system  160  may also maintain, within the one or more tangible, non-transitory memories, notification system data  166  that identifies one or more network-connected computing systems capable of providing contextual notifications of authorized purchase transactions to one or more computing systems and devices operating within environment  100 , such as contextual notification system  180  of  FIG.  1   . In some instances, notification system data  166  may include data that identifies a unique network address of contextual notification system  180  within communications network  120  (e.g., an IP address, a MAC address, or other unique network address) and additionally or alternatively, data identifying a programmatic interface that facilitates secure application-to-application communication between issuer system  160  and contextual notification system  180 . 
     By way of example, and based on contextual data characterizing a purchase transaction authorized by issuer system  160 , contextual notification system  180  may perform any of the exemplary processes described herein to generate notification data that is contextually and temporally relevant to the authorized purchase transaction, and to transmit that notification data to a client device associated with the authorized purchase transaction, such as client device  102 . In some aspects, contextual notification system  180  may be configured to generate and transmit the notification data subsequent to, but contemporaneously with, the authorization of the purchase transaction by issuer system  160 , and contextual notification system  180  may transmit the contextual notification data to client device  102  across network  120  through a programmatic interface maintained by an application program executed by client device  102 . 
     Contextual notification system  180  may maintain, within one or more tangible, non-transitory memories, data that facilitates the generation of one or more notifications of contextual and temporal relevance to a purchase transaction authorized by issuer system  160 , and the provision of the generated notifications directly to a client device associated with that authorized purchase transaction via application-to-application communication. By way of example, as illustrated in  FIG.  1   , contextual notification system  180  may establish and maintain a customer database  182 , a merchant database  184 , a contextual data store  186 , a template data store  188 , and a content data store  190  within the one or more tangible, non-transitory memories. 
     In some aspects, customer database  182  may include structured or unstructured data records identifying and characterizing one or more customers that “opted-in” to participate in the contextual notification and messaging processes described herein. For example, user  101  may access a digital portal associated with contextual notification system  180 , e.g., through a web page rendered and presented on display unit  112 A by a web browser executed by client device  102 , or through a graphical user interface (GUI) generated and presented on display unit  112 A by an application program executed by client device  102 , such as the payment application described herein. The presented web page or GUI may include digital content (e.g., rendered text, graphics, other interface elements, etc.) that prompts user  101  to register or “opt-in” for notifications generated by contextual notification system  180 , and in some instances, user  101  may provide, to client device  102  via input unit  112 A, registration data that confirms an intention of user  101  to opt-in and receive the contextual notifications from notification system  130 . Client device  102  may receive the registration data, and may perform operations that package portions of the registration data into a corresponding registration request, which client device  102  may provide to contextual notification system  180  across network  120 , e.g., through a corresponding programmatic interface. 
     The registration data may, for example, include a unique identifier of user  101  (e.g., a login credential associated with user  101  and/or the executed application program), data identifying client device  102  (e.g., a mobile telephone number associated with user  101  and assigned to client device  102 ), and data characterizing a mailing address of a residence of user  101 . The registration data may further include data specifying one or more demographic characteristics of user  101 , such as, but not limited to age, gender, educational level, occupation, income, residence, native, spoken, or preferred language, civil or marital status, or number of children. In further aspects, and in addition to the portions of the received registration data, client device  102  may also include, within the request, data identifying a network address of client device  102  (e.g., an IP address, a MAC address, or other unique identifier of client device  102  within network  120 ) or data identifying or characterizing the executed application program, such as data identifying a programmatic interface associated with the executed application program. 
     In some aspects, contextual notification system  180  may receive the request from client device  102 , and may perform operations that store portions of the received request within one or more of the structured data records of customer database  182 . Additionally, in some aspects, contextual notification system  180  may generate, and store within customer database  182 , additional information that identifies and characterizes certain portions of the stored data and, in some aspects, facilitates an access and retrieval of the stored data portions by contextual notification system  180 . For example, the additional data may include metadata that identifies or “tags” portions of the stored data and in some instances, enables contextual notification system  180  to selectively access and retrieve elements of “tagged” data for inclusion within one or more notification templates, as described herein. 
     Referring back to  FIG.  1   , merchant database  184  may include structured or unstructured data records identifying and characterizing one or more merchants that participate in the contextual notification and messaging processes described herein. For example, contextual notification system  180  may generate and transmit, to one or more client devices within environment  100 , notifications of contextual and temporal relevance to authorized purchase transactions initiated between POS terminal  122  and one or more client devices, such as client device  102 . In some instances, merchant database  182  may include, for merchant  121 , data records that include a unique identifier of merchant  121  (e.g., merchant name), identifiers of one or more terminal devices associated with or operated by merchant  121  (e.g., an IP address, MAC address, or other unique network identifier of POS terminal  122 ), and additional data that characterizes or merchant  121  or POS terminal  122 , such as an address of merchant  121  or a geographic location of POS terminal  122 . 
     Contextual data store  186  may include structured or unstructured data records identifying and characterizing a context one or more purchase transactions authorized by issuer system  160 . For example, and as described herein, contextual notification system  180  may receive contextual data that identifies and characterizes a purchase transaction initiated by client device  102  at POS terminal  122  and authorized by issuer system  160 . In some instances, the received contextual data may include, but is not limited to, identifiers of client device  102  and POS terminal  122  (e.g., IP addresses, MAC addresses, or other unique identifiers), an identifier of a product or service involved in the authorized purchase transaction, a transaction amount of the authorized purchase transaction, a transaction data or time, and values of other parameters that characterize the authorized purchase transaction. In some aspects, contextual notification system  180  may perform operations that store portions of the received contextual data, which characterizes the purchase transaction authorized by issuer system  160 , within one or more of the structured or unstructured data records of contextual data store  186 . 
     Template data store  188  may include template data identifying and characterizing notification templates that, when processed by contextual notification system  180 , facilitate a generation of notification data having contextual and temporal relevance to corresponding purchase transactions authorized by issuer system  160 . In some aspects, the template data may specify, for each of the notification templates, one or more elements of digital content (e.g., textual content, graphical content, audio or visual content, etc.) for inclusion within the generated notification data. Further, the template data characterizing each of the notification templates may also include formatting data that establishes visual characteristics of the one or more elements of digital content when displayed within rendered notification data on a corresponding interface, and additionally or alternatively, positions of the displayed elements of digital within the corresponding interface. Template data store  188  may also include data, e.g., structural data, characterizing a structure of one or more notification templates generated dynamically by contextual notification system  180  through the exemplary processes described herein. 
     Content data store  190  may include a plurality of elements of digital content suitable for incorporation into the dynamically generated notification templates. In some aspects, content data store  190  may also include, for each of the digital content elements, additional data (e.g., metadata) associating that digital content elements with one or more customer demographic characteristics. 
     II. Exemplary Computer-Implemented Processes for Generating and Provisioning Contextual Notifications to Network-Connected Devices 
     In some embodiments, a client device, e.g., client device  102 , may perform operations that initiate an exchange of data with a network-connected device, such as POS terminal  122 , across a direct channel of communications, e.g., communications channel  120 A. As described herein, the initiated data exchange may be characterized by a value of one or more data-exchange parameters, and POS terminal  122 , in conjunction with acquirer system  130 , payment network system  140 , issuer system  160 , and tokenization system  170 , may perform operations that authorize a performance of the initiated data exchange in accordance with the values of the one or more data-exchange parameters. 
     Further, and as described herein, issuer system  160  may perform additional operations that generate and transmit, to contextual notification system  180 , contextual data that characterizes the authorized data exchange. The contextual data may, for example, include the value of the one or more data-exchange parameters and identifiers of client device  102  and POS terminal  122  (e.g., corresponding IP addresses, MAC addresses, or other unique network addresses). Contextual notification system  180  may receive the contextual data from issuer system  160 , and in some aspects, may perform any of the exemplary processes described herein to generate, and transmit to client device  102 , notifications of contextual and temporal relevance to the authorized data exchange across an established communications channel. 
     The initiated data exchange may, in certain instances, correspond to a purchase transaction initiated at POS terminal  122  by a customer of merchant  121 , e.g., user  101 . For example, user  101  may elect to purchase a sweater from merchant  121  (e.g., a Nordstrom™ department store in Washington, D.C.) for an agreed-upon price of $50.00 (e.g., the transaction amount). A computing system maintained by merchant  121  (e.g., a cash register) may obtain transaction data characterizing the initiated transaction, such as an identifier of the product or products involved in the transaction (e.g., a universal product code (UPC) assigned to the sweater) and the corresponding transaction amount (e.g., $50.00), and provide the obtained transaction data to POS terminal  122  across any appropriate wired or wireless connection. 
     POS terminal device  122  may receive the transaction data from the merchant computing system, and may perform operations that generate interface elements representative of portions of the received transaction data, which POS terminal  122  may present within a graphical user interface (GUI) displayed on display unit  127 A. In response to the presented interface elements, which may prompt user  101  to provide a payment instrument capable of funding the $50.00 transaction amount of the initiated transaction, user  101  may dispose client device  102  proximate to POS terminal  122 , and interface unit  114  of client device  102  may establish communications channel  120 A with POS terminal  122  (e.g., through the communications device included within interface unit  128  of POS terminal  122  using any of the short-range, wireless communication protocols described above). Processor  104  of client device  102  may execute a payment application (e.g., a mobile wallet application) that causes client device  102  to present, to user  101  through display unit  112 A, interface elements that identify one or more payment instruments maintained within a mobile wallet established by the executed payment application and available to fund the initiated transaction, such as a Visa™ credit card. 
     Referring to  FIG.  2 A , a payment module  202  of client device  102  may receive, through input unit  112 B, input data  201  that identifies the payment instrument selected for use in the initiated transaction (e.g., the Visa™ credit card). In some aspects, payment module  202  may process input data  201  to obtain an identifier of the selected payment instrument, and based on the obtained identifier, perform operations that access and load a portion of payment application data  110  that corresponds to the selected payment instrument. Payment module  202  may access payment application data  110  (e.g., as maintained within data repository  106 ), and load payment instrument data  204  that identifies an account number, an expiration data, and/or a card verification value assigned to the Visa™ credit card, along with additional or alternate payment instrument or customer data that facilitates an authorization of the initiated transaction by payment network system  140  or issuer system  160 . 
     In some examples, payment instrument data  204  may include elements of sensitive data susceptible to exposure and compromise when transmitted between computing systems and devices operating within environment  100 , e.g., across communications network  120  or direct communications channel  120 A. To mitigate a risk of exposure or compromise, one or more of these sensitive data elements may be replaced within a non-sensitive representation of that data element, e.g., a token, having no extrinsic or exploitable meaning or value. For instance, the account number of the Visa™ credit card, as maintained within payment application data  110  by payment module  202 , may not correspond to the actual account number generated by issuer system  160 , but may instead correspond to a tokenized representation of that account number generated by a tokenization service provider associated with issuer system  160  or payment network  140 , e.g., tokenization system  170  of  FIG.  1   . 
     Referring back to  FIG.  2   , payment module  202  may perform additional operations that access and load, from corresponding portions of data repository  106 , device data  206  that uniquely identifies client device  102  within communications network  120  (e.g., an IP address, a MAC address, a unique identifier of user  101 , etc.). Payment module  202  may package portions of payment instrument data  204  and device data  206  into payment data  208 , which client device  102  may transmit across communications channel  120 A to POS terminal  122  using any of the short-range communications protocols outlined above. In some examples, not illustrated in  FIG.  2   , payment data  208  may also include data that identifies and authenticates the mobile wallet established and maintained by payment module  202 , such a mobile wallet token or a unique mobile wallet address. 
     A transaction initiation module  210  of POS terminal  122  may receive payment data  208  from client device  102 , and further, may receive transaction data  209  from the merchant computing system, e.g., the cash register operated by merchant  121 . Transaction data  209  may, for example, include data characterizing the initiated transaction, such as, but not limited to, an identifier of the product or products involved in the transaction (e.g., the UPC assigned to the article of clothing) and the corresponding transaction amount (e.g., $50.00). In some aspects, transaction initiation module  210  may provide portions of payment data  208  and transaction data  209  as an input to an authorization request module  212 , which may perform any of the exemplary processes described herein to generate a selectively encrypted authorization request that corresponds to the initiated transaction. 
     For example, authorization request module  212  may receive the payment data  208  and transaction data  209 , and may perform additional operations that access and load data identifying POS terminal  122 , e.g., terminal identification data  214 , from a corresponding portion of data repository  126 , e.g., from terminal data  126 A. In some instances, terminal identification data  214  may include a unique network address of POS terminal  122  within communications network  120 , such as an IP address or a MAC address. In other instances, terminal identification data  214  may include a POS cryptogram that uniquely identifies POS terminal  122 , which may be generated and assigned to POS terminal  122  by payment network system  140 . 
     In additional aspects, authorization request module  212  may perform operations that identify and selectively encrypt one or more sensitive portions of payment data  208  (e.g., which includes payment instrument data  204  and device identification data  206 ) and terminal identification data  214 . For example, as illustrated in  FIG.  2   , data repository  126  may maintain cryptographic data  216  that identifies and characterizes a cryptographic key available and suitable for encrypting the one or more sensitive portions of payment data  208  and terminal identification data  214  for transmission across communications network  120 . 
     In one instance, cryptographic data  216  may include a symmetric encryption key generated by or provided to POS terminal  122 . In other instances, and consistent with the disclosed embodiments, cryptographic data  216  may include a public cryptographic key associated with and generated by tokenization system  170  or other computing systems operating in environment  100 , such as payment network system  140 . The disclosed embodiments are, however, not limited to these examples or symmetric encryption keys or public cryptographic keys, and in other aspects, cryptographic data  216  may include data that identifies any additional or alternate cryptographic key, or combination of cryptographic keys. 
     In some aspects, authorization request module  212  may access and load the cryptographic key from cryptographic data  216 , and perform operations that encrypt all or a portion of payment data  208  and terminal identification data  214  using the loaded cryptographic key. For example, and as described herein, the loaded cryptographic key may correspond to the public cryptographic key generated by tokenization system  170 , and authorization request module  212  may encrypt all portions (e.g., both sensitive and insensitive data) of payment data  208  and terminal identification data  214  using the public cryptographic key of tokenization system  170 . 
     Authorization request module  212  may perform additional operations that package the selectively encrypted payment data  208  and terminal identification data  214  into an encrypted authorization request  218 . In some aspects, portions of selectively encrypted payment data  208  may include tokenized representations of sensitive account information (e.g., tokenized account numbers, expiration dates, card verification values, etc.), and encrypted authorization request  218  may correspond to a tokenized authorization request (e.g., an “authorization token”) that further masks sensitive account, customer, and terminal data during transmission across communications network  120 . 
     Additionally, and by way of example, encrypted authorization request  218  may be structured by authorization request module  212  to include header data and payload data. In some instances, the header data may include, but is not limited to, data that identifying the cryptographic key loaded from cryptographic data  216  (e.g., the public cryptographic key of tokenization system  170 ). Further, the payload data may include, but is not limited to, payment data  208  and terminal identification data  214 , as selectively encrypted by authorization request module  212  using the loaded cryptographic key, and the applied digital signature. 
     In some aspects, authorization request module  212  may perform additional operations that provide encrypted (and/or tokenized) authorization request  218  as an input to a routing module  220  of POS terminal  122 . For example, routing module  220  may access and load a network address of acquirer system  130  from acquirer data  126 C (e.g., the MAC address or the IP address of acquirer system  130 ). Further, routing module  220  may perform operations that transmit encrypted (and/or tokenized) authorization request  218  across network  120  to the network address of acquirer system  130 , e.g., through communications unit  127 C using any of the communications protocols outlined above. 
     As illustrated in  FIG.  2 A , a routing module  222  of acquirer system  130  may receive encrypted authorization request  218  from POS terminal  122 . In some examples, routing module  222  may access payment network data  134  and extract a network address of payment network system  140  (e.g., a MAC address or an IP address). In certain aspects, routing module  222  may transmit encrypted authorization request  218  across network  120  to the extracted network address of payment network system  140 , e.g., using any of the communications protocols described above. 
     A routing module  224  of payment network system  140  may receive encrypted authentication request  218  from acquirer system  130 , which received and relayed encrypted authentication request  218  from POS terminal  122 . In some aspects, routing module  224  may access issuer data  146  and extract a network address of an issuer system associated with the selected payment instrument (e.g., a MAC address or IP address of issuer system  160 , which issued the payment instrument identified and characterized by encrypted and/or tokenized payment instrument data  204 ). Routing module  224  may transmit encrypted authorization request  218  across network  120  to the extracted network address of issuer system  160 , e.g., using any of the communications protocols described above. 
     As illustrated in  FIG.  2 B , a request management module  226  of issuer system  160  may receive encrypted authorization request  218 , and in conjunction with tokenization system  170 , may perform operations that decrypt and/or de-tokenize encrypted authorization request  218 . In some instances, and responsive to the receipt of encrypted authorization request  218 , request management module  226  may access stored TSP data  164  (e.g., as maintained within one or more tangible, non-transitory memories) and load data identifying a computing system of a corresponding tokenization service provider capable of decrypting and/or de-tokenizing encrypted authorization request  218 . 
     For example, and based on portions of TSP data  164  and encrypted authorization request  218 , request management module  226  may establish that tokenization system  170  is capable of decrypting and/or de-tokenizing encrypted authorization/request  220 . In some instances, request management module  226  may load, from TSP data  164 , a network address that uniquely identifies tokenization system  170  within network  120 , such as an IP address or a MAC address, and issuer system  160  may be configured to transmit encrypted authorization request  218  to the network address of tokenization system  170 , e.g., using any of the communications protocols outlined above. 
     In certain aspects, a programmatic interface established and maintained by tokenization system  170 , such as application programming interface (API)  228 , may receive encrypted authorization request  218  from issuer system  160 . By way of example, API  228  may be associated with, and established and maintained by a decryption module  230  of tokenization system  170 , and may facilitate direct, module-to-module communications between request management module  226  of issuer system  160  and decryption module  230 . API  228  may provide encrypted authorization request  218  as an input to decryption module  230 , and as described below, decryption module  230  may perform operations that decrypt encrypted authorization request  218  based on one or more locally stored or locally generated cryptographic keys. 
     By way of example, tokenization system  170  may maintain, within one or more tangible, non-transitory memories, cryptographic data  172  that includes one or more cryptographic keys capable of selectively decrypting authorizations requests transmitted to tokenization system  170  by issuer system  160 , and additionally or alternatively, by payment network system  140 . In some aspects, decryption module  230  may perform operations that identify one of the stored cryptographic keys that is associated with and capable of decrypting encrypted authorization request  218 , e.g., cryptographic key  231 . 
     In one instance, described herein, authorization request module  212  of POS terminal  122  may generate encrypted authorization request  218  using a public cryptographic key associated with and generated by tokenization system  170 , and cryptographic key  231  may correspond to a private counterpart of that public cryptographic key (e.g., a private cryptographic key associated with or generated by tokenization system  170 ). In other instances, POS terminal  122  may generate encrypted authorization request  218  using a locally generated or locally stored symmetric encryption key, and cryptographic key  231  may correspond to a counterpart symmetric encryption key generated or stored locally by tokenization system  170 . These disclosed embodiments are, however, not limited to these examples of cryptographic key  231 , and in other aspects, cryptographic key  231  may correspond to any additional or alternate cryptographic or encryption key capable of decrypting encrypted authorization request  218 , including a combination of cryptographic or encryption keys maintained within cryptographic data  172 . 
     Further, in some instances, one or more portions of encrypted authorization request  218  may identify an encryption scheme applied by authorization request module  212  of POS terminal  122  to generate encrypted authorization request  218 . For example, a header portion of encrypted authorization request  218  may include data specifying the encryption scheme (e.g., encryption using the public cryptographic key associated with and generated by tokenization system  170  or the symmetric encryption key, etc.). Decryption module  230  may, in certain aspects, process the header portion of encrypted authorization request  218  to extract data identifying and characterizing the encryption scheme, and identify a corresponding one of the locally stored cryptographic keys, e.g., cryptographic key  231 , that is consistent with the identified extracted data. 
     Decryption module  230  may perform operations that load cryptographic key  231  from a corresponding portion of cryptographic data  172 , and apply cryptographic key  231  to portions of encrypted authorization request  218  to generate and output a decrypted authorization request  232 . In some instances, decryption module  230  may provide decrypted authorization request  232  as an input to a routing module  234 , which may transmit decrypted authorization request  232  across network  120  to issuer system  160 , e.g., using any of the communications protocols described herein. 
     Additionally, and as described above, decrypted authorization request  232  may include one or more tokenized representations of sensitive data included within one or more portions of payment instrument data  204 , device identification data  206 , and/or terminal identification data  208 . For example, instead of specifying the account number of the selected Visa™ credit card, payment instrument data  204  may include an account number token that is similar in structure and format to the account number (e.g., having a similar length, etc.), but that has no exploitable value to malicious third parties operating within environment  100 . In other examples, payment instrument data  204  may include additional or alternate tokens that replace and mask one or more portions of the account number, such as the last four digits, and further, portions of the expiration date, the card verification value, or other portions sensitive data incorporated within payment instrument data  204 . In other examples, device identification data  206  and/or terminal identification data  208  may also include one or more tokens that mask portions of the IP addresses, MAC addresses, or other unique identifiers of corresponding ones of client device  102  and/or terminal device  122 . 
     Prior to transmitting decrypted authorization request  232  to issuer system  160 , tokenization system  170  may further process decrypted authorization request  232  to replace each of the tokenized representations with corresponding elements of sensitive account, device, and/or terminal data. By way of example, a token redemption module  236  may receive decrypted authorization request  232 , and process decrypted authorization request  232  to identify an existence of a token, such as a payment token  238 , that masks a portion of sensitive account information within payment instrument data  204 , such as the account number of the selected Visa™ credit card. Further, and upon identification of payment token  238 , token redemption module  236  may perform operations that access a token vault maintained within the one or more tangible, non-transitory memories, e.g., token vault  174 , and that identify one or more elements of sensitive account data  240  (e.g., the account number of the selected Visa™ credit card) that are associated with, and represented by, payment token  238 . For instance, token redemption module  236  may access a data record within token vault  174  associated with payment token  238  and extract, from that data record or from one or more additional linked data records of token vault  174 , the one or more elements of sensitive account data  240 . 
     Token redemption module  236  may further process decrypted authorization request  232  to replace payment token  238  with the one or more associated elements of sensitive account data  240  (e.g., the “redeem” payment token  238 ). Additionally, although not illustrated in  FIG.  2 B , token redemption module  236  may perform similar operations on decrypted authorization request  232  to replace one or more additional payment tokens within corresponding elements of sensitive account data (e.g., additional or alternate portions of the account number, expiration date, card verification value, etc.), to replace one or more additional tokens representative of elements of sensitive device data with these sensitive device data elements, and additionally or alternatively, to replace one or more additional tokens representative of elements of sensitive terminal data with these sensitive terminal data elements. Tokenization system  170  may perform any of the exemplary processes described herein to transmit detokenized and decrypted authorization request  232  across network  120  to issuer system  160 . 
     As illustrated in  FIG.  2 B , request management module  226  of issuer system  160  may receive decrypted authorization request  232  from tokenization system  170 . In some instances, and as described herein, tokenization system  170  may also perform any of the exemplary processes described herein to detokenize decrypted authorization request  232  prior transmitting decrypted authorization request  232  to issuer system  160 . 
     For example, decrypted authorization request  232  may include payment instrument data  204  that identifies the payment instrument selected to fund the transaction, such as, but not limited to, the primary account number, expiration date, and/or card verification value assigned to the selected Visa™ credit card. Additionally, decrypted authorization request  232  may also include device identification data  206  that uniquely identifies client device  102  and terminal identification data  208  that uniquely identifies POS terminal  122 . Examples of device identification data  206  and terminal identification data  208  may include, but are not limited to, an IP address, a MAC address, a unique cryptogram, or other unique device identifier. As further illustrated in  FIG.  2 B , decrypted authorization request  232  may include transaction data  209  that characterizes the transaction initiated at POS terminal  122 , such as, but not limited to, a transaction value, an identifier of a product or service involved in the transaction (e.g., a UPC assigned to the purchased sweater), and/or a transaction date or time. 
     In some aspects, request management module  226  may provide decrypted authorization request  232  as an input to an authorization decision module  242 , which may perform operations that authorize the initiated transaction in accordance with the transaction parameter values (e.g., as specified within transaction data  209 ) and using the selected payment instrument (e.g., as specified within payment instrument data  204 ). In one example, and without limitation, authorization decision module  242  may be configured to authorize the initiated transaction in response to a successful verification of the selected payment instrument, and additionally or alternatively, a successful verification of payment network system  140  or a successful verification of decrypted authorization request  232 . 
     Authorization decision module  242  may process decrypted authorization request  232  to extract, among other things, the transaction value that characterizes the initiated transaction (e.g., $50.00) and account data that characterizes the selected payment instrument (e.g., the account number, expiration data, and/or card verification value of the selected Visa™ credit card). Further, authorization decision module  242  may also access stored data that characterizes a current account status of one or more payment instruments issued by the financial institution that maintains issuer system  160  (e.g., within account database  162 ), and load one or more data records  244  of account database  162  that characterize the current status of the selected payment instrument. Data records  244  may specify, among other things, a current account status of the selected Visa™ credit card (e.g., whether the account is delinquent), a current account balance of the selected Visa™ credit card, a credit limit established for the selected Visa™ credit card, and/or values of other account parameters that characterize the selected Visa™ credit card. 
     For example, data records  244  may indicate that a current account balance of the selected Visa™ credit card is $225.50, and the credit limit established for the selected Visa™ credit card is $2,000.00. In some aspects, authorization decision module  242  may determine that the $50.00 transaction value of the initiated purchase would fail to increase the current account balance of the selected Visa™ credit card above the established credit limit of $2,000.00, and may determine to authorize the initiated $50.00 purchase using the selected Visa™ credit card. In other aspects, authorization decision module  242  may predicate the decision to authorize the initiated transaction based on additional or alternate factors that include, but are not limited to, a magnitude of the transaction value that characterizes the initiated transaction, a velocity of transactions involving the Visa™ credit card account and/or POS terminal  122 , one or more balance or credit-limit thresholds established by user  101  or issuer system  160 , and other authorization factors or rules, such as those that characterize a risk of fraud or compromise (e.g., that the initiated transaction diverges from a transaction pattern of user  101  and/or the selected Visa™ credit card). 
     In some aspects, and in response to the determination to authorize the initiated $50.00 transaction using the selected payment instrument, authorization decision module  242  may generate authorization data  246  that includes a generated authorization code and data that characterizes the authorized purchase transaction (such as the authorized transaction amount, the parties to the authorized transaction, etc.). In some aspects, authorization decision module  242  may provide authorization data  246  to a confirmation module  248 , which may package portions of authorization data  246  into a confirmation message  250 , and issuer system  160  may transmit confirmation message  250  across network  120  to payment network system  140  using any of the communications protocols described above. 
     As illustrated in  FIG.  2 C , a routing module  224  of payment network system  140  may receive confirmation message  250  from issuer system  160 , and may perform any of the processes described above to route confirmation message  250  to acquirer system  130  across network  120 . Further, routing module  222  of acquirer system  130  may receive confirmation message  250  from payment network system  140 , may perform any of the processes described above to route confirmation message  250  to acquirer system  130  across network  120 . 
     POS terminal  122  may receive confirmation message  250  through communications unit  127 C, and a transaction confirmation module  252  may perform operations that extract authorization data  246  from confirmation message  250 . In some aspects, authorization data  246  may include the authorization code and the additional data that characterizes the authorized transaction (e.g., the authorized transaction amount, the parties to the authorized transaction, etc.), which POS terminal  122  store within one or more data records of transaction log  126 B, along with additional values of transaction parameters, such as, but not limited to, a transaction time and date or a transaction location. 
     Transaction confirmation module  252  may also provide authorization data  246  to an interface element generation module  254 , which may process authorization data  246  to generate one or more interface elements  256 . In some aspects, interface element generation module  254  may provide generated interface elements  256  to display unit  127 A, which may present interface elements  256  within a graphical user interface (GUI)  258  that identifies the authorization code and confirms the authorization of the initiated transaction. 
     In some exemplary embodiments, issuer system  160  may be configured to receive encrypted authorization requests (e.g., encrypted authorization request  218  of  FIGS.  2 A and  2 B ) from payment network system  140 , and in conjunction with tokenization system  170 , may perform operations that decrypt and/or de-tokenize encrypted authorization request  218 . In other embodiments, described below in reference to  FIG.  2 D , routing module  224  of payment network system  140  may be configured to access stored TSP data  148  and load a unique network identifier of tokenization system  170  (e.g., an IP address or a MAC address). 
     Referring to  FIG.  3 D , routing module  224  may perform additional operations that communicate with tokenization system  170  through a programmatic interface (e.g., with decryption module  220  of tokenization system  170  through API  228 ), and may transmit encrypted authorization request  218  directly to tokenization system  170  through API  228 , and not to issuer system  160 . Tokenization system  170  may perform any of the exemplary processes described herein to decrypt, and in some instances, detokenize, one or more potions of encrypted authorization request  218  and generate a decrypted and detokenized authorization request, e.g., decrypted authorization request  260 . Tokenization system  170  may, in some instances, transmit decrypted authorization request  260  across network  120  to issuer system  160 , which may perform any of the exemplary processes described herein to authorize an initiated transaction based on portions of decrypted authorization request  260 . 
     In some aspects, tokenization system  170  may not be configured to exchange data with issuer system  160  across one or more direct communications channels or across network  120 . Instead, tokenization system  170  may be configured to transmit decrypted authorization request  260  back to payment network system  140  across the established direct communications channel. Routing module  224  of payment network system  140  may receive decrypted authorization request  260  from tokenization system  170 , and may be configured to access and load, from issuer data  146 , a unique network identifier of issuer system  16  (e.g., an IP address or a MAC address). Further, although not depicted in  FIG.  2 D , routing module  224  may perform additional operations that establish a direct communications channel with issuer system  160  through a corresponding programmatic interface, and may transmit decrypted authorization request  260  directly to tokenization system  160  through the programmatic interface. 
     As described herein, issuer system  160  may perform operations that authorize a transaction initiated by a client device, e.g., client device  102  operated by user  101 , at a terminal device, e.g., POS terminal  122  operated by merchant  121 . For example, the transaction may correspond to a purchase of an article of clothing (e.g., a sweater) from a physical location of merchant  121  (e.g., a Nordstrom™ store located in Washington, D.C.). In further embodiments, issuer system  160  may also generate and transmit contextual data characterizing the authorized transaction to an additional system operating within environment  100 , such as a contextual notification system  180 . The contextual data may, for example, include values of one or more transaction parameters that characterize the authorized transaction, an identifier of client device  102  or user  101 , and an identifier of POS terminal  122  or merchant  121 , which may collectively establish a “context” of the authorized transaction. 
     As described below in reference to  FIGS.  3 A and  3 B , contextual notification system  180  may process the received contextual data, identify or generate a notification template consistent with the authorized transaction, merchant  121 , and/or user  101 . Contextual notification system  180  may populate the notification template with portions of the contextual data, augmented with additional data characterizing user  101  or merchant  121 , to generate notification data of contextual and temporal relevance to the authorized transaction. In some instances, contextual notification system  180  may provide the generated notification data to client device  102  contemporaneously with the authorization of the initiated transaction by issuer system  160  for presentation through a corresponding interface, such as a GUI generated by the executed payment application. 
     Referring to  FIG.  3 A , a contextual notification module  302  of issuer system  160  may receive, as an input, authorization data  246  that confirms the authorization of the initiated purchase transaction in accordance with certain transaction parameter values (e.g., as specified within transaction data  209 ) and using the selected payment instrument (e.g., as specified within payment instrument data  204 ). In some aspects, and responsive to the receipt of authorization data  246 , contextual notification module  302  may generate contextual data  304  that characterizes the authorized transaction, and a routing module  306  of issuer system  160  may perform operations that transmit contextual data  304  across network  120  to a network address of contextual notification system  180 . A programmatic interface established and maintained by contextual notification engine  180 , such as API  308 , may receive and route contextual data to a management module  310 . In some instances, management module  310  may perform operations that store all or a portion of contextual data  304  within one or more tangible, non-transitory memories, e.g., within contextual data store  186 , and API  308  may facilitate module-to-module communications between routing module  308  of issuer system  160  and management module  310  of contextual notification system  180 . 
     As illustrated in  FIG.  3 A , contextual data  304  may include, but is not limited to, an identifier of client device  102  (e.g., device identifier  304 A), and identifier of POS terminal  122  (e.g., terminal identifier  304 B), and values of transaction parameters that characterize the authorized purchase (e.g., transaction data  304 C, which includes, but is not limited to, the transaction amount, the identifier of the purchased product, and/or the transaction date or time). Device identifier  304 A and/or terminal identifier  304 B may include, but are not limited to, an IP address, a MAC address, or other unique network identifier. Further, in certain aspects, a registration confirmation module  312  of contextual notification system  180  may access portions of stored contextual data  304 , and perform operations that determine whether user  101  and/or merchant  121  registered (e.g., “opted-in”) to participate in the contextual notification processes described herein. 
     For example, registration confirmation module  312  may perform operations that access and load device identifier  304 A from stored contextual data  304 , and further, that access one or more stored data records that identify and characterize customers that registered to participate in the contextual notification processes described herein, e.g., within registered customer records  314  of customer database  182 . In one instance, registration confirmation module  312  may confirm that device identifier  304 A, which identifies client device  102  operated by user  101 , is associated with at least one of registered customer records  314  and thus, that user  101  is a registered customer that opted-in to receive contextual notifications of relevance to purchase transactions authorized by issuer system  160 . 
     In further examples, registration confirmation module  312  may perform additional operations that access and load terminal identifier  304 B from stored contextual data  304 , and further, that access one or more stored data records that identify and characterize merchants that registered to participate in the contextual notification processes described herein, e.g., within registered merchant records  316  of merchant database  184 . In one instance, registration confirmation module  312  may determine that terminal identifier  304 B, which identifies terminal device  122  operated by merchant  121 , is associated with at least one of registered merchant records  316 . Based on this determination, registration confirmation module  312  may establish that merchant  121  agrees to participate in participate in the contextual notification processes described herein and further, provide data specifying one or more notification templates that support the generation of these contextual notifications. 
     In response to the determination that user  101  and/or merchant  121  opted-in to participate in the contextual notification processes described herein, registration confirmation module  312  may generate confirmation data  318  that confirms the participant status of user  101  and/or merchant  121 , and includes, among other things, device identifier  304 A and terminal identifier  304 B. In some aspects, registration confirmation module may provide confirmation data  318  as an input to a template selection module  320 . 
     Referring to  FIG.  3 B , template selection module  320  may receive confirmation data  318 , and may access portions of stored contextual data  304 , e.g., as maintained within contextual data store  186 . In some aspects, template selection module  320  may access template data store  188 . For example, as described herein, template data store  188  may include template data identifying and characterizing one or more notification templates that, when processed by contextual notification system  180 , facilitate a generation of notification data having contextual and temporal relevance to the authorized purchase transaction, e.g., the purchase of the $50.00 sweater from the Washington, D.C., location of Nordstrom™, on Oct. 28, 2017. 
     In some instances, one or more of the notification templates may be specific to a particular merchant, and the stored template data characterizing each of the merchant-specific templates may include an identifier of the corresponding merchant, such as a merchant name. In additional instances, and consistent with the disclosed embodiments, one or more of the notification templates may be specific not only to a particular merchant, but also to purchase transactions initiated during a particular temporal interval (e.g., a particular season). The stored template data characterizing each of the seasonal and merchant-specific templates may include an identifier of the corresponding merchant, such as a merchant name, and an identify of the corresponding temporal interval. 
     The disclosed embodiments are, however, not limited to these examples of seasonal or merchant-specific templates. In other aspects, described herein, one or more of the notification templates may be associated with additional or alternate data characterizing the authorized purchase transaction, user  101 , or merchant  121 . For example, one or more of the notification templates may be specific to a particular merchant, and may further include digital content of relevance to, customers exhibiting certain demographic characteristic (e.g., an age bracket, an income or educational level, a city or state of residence, etc.), a specified location of the particular merchant, or a particular product or service involved in the authorized transaction. 
     Based on portions of the confirmation data  318  and/or stored contextual data  304 , template selection module  320  may identify and extract notification template data  322  specifying a notification template that is consistent with, and appropriate to, the now authorized purchase transaction. For example, confirmation data  318  may include data specifying that the authorized purchase transaction was initiated at the Washington, D.C., location of Nordstrom™, and transaction data  304 C may specify that client device  102  initiated the authorized purchase transaction at 14:35 on Oct. 28, 2017. In some aspects, template selection module  320  may process the stored template data (e.g., as maintained within template data store  188 ) to identify a corresponding one of the notification templates that is associated with purchase transactions initiated at Nordstrom™. Template selection module  320  may extract a portion of the stored template data, e.g., notification template data  322 , that specifies the identified notification template, and provide notification template data  322  as an input to template population module  324 . 
     In other instances, and based on the stored notification template data, template selection module  320  may identify a plurality of the messaging templates that are associated with purchase transactions initiated at Nordstrom™. Template selection module  320  may, in some aspects, filter the identified plurality of notification templates in accordance with a value of one or more transaction parameters that characterize the now-initiated purchase transaction, such as, but not limited to, a transaction date or time, a transaction location, or an identifier of the purchased product or service, and select a corresponding one of the plurality of notification templates that is consistent with, and appropriate to, the one or more transaction parameter values. 
     For example, the authorized transaction may have been initiated by client device  102  at 14:35 on Oct. 28, 2017, and based on the stored template data, template selection module  320  may identify the notification template that is specific to not only purchases initiated at Nordstrom™ locations, but also to purchase transactions initiated during the month of October. As described above, template selection module  320  may extract a portion of the stored template data, e.g., notification template data  322 , that specifies the identified notification template, and provide notification template data  322  as an input to template population module  324 . 
     Template population module  324  may perform operations that process notification template data  322  and populate portions of notification template data  322  with additional elements of data characterizing the authorized purchase transaction, the customer (e.g., user  101 ), and/or the merchant (e.g., the Nordstrom™ retail location) to generate contextual notification data  326  suitable for transmission to client device  102 . In some instances, notification template data  322  may establish a framework for a contextual notification relevant to user  101 &#39;s authorized purchase of the sweater from the Nordstrom™ retail location. For example, notification template data  322  may specify one or more elements of digital (e.g., textual content, graphical content, audio or visual content, etc.) for inclusion within the generated notification data, and may include formatting data that establishes visual characteristics (e.g., a font size of the textual content) and/or positions of the one or more elements of graphical content when rendered for display on a corresponding interface. 
     Further, notification template data  322  may include, at corresponding positions within the graphical content, placeholder data (e.g., metadata pointers or tags) that references corresponding elements stored transaction, customer, and/or merchant data. In some aspects, described below in reference to  FIGS.  3 C and  3 D , template population module  324  can perform operations that parse the notification template data, detect the occurrences of each placeholder data element within the template content, and based on the placeholder data elements, access and load the corresponding elements stored transaction, customer, and/or merchant data from the one or more tangible, non-transitory memories (e.g., from one or more of customer database  182 , merchant database  184 , or contextual data store  186 ). Template population module  324  may perform further operations that populate the identified notification template by replacing each of the placeholder data elements within notification template data  322  with the corresponding elements of the stored transaction, customer, and/or merchant data. 
       FIG.  3 C  is a schematic diagram illustrating an exemplary notification template  330  consistent with, and appropriate to, user  101 &#39;s authorized purchase of the sweater from the Nordstrom™ retail location in Washington, D.C., on Oct. 28, 2017. As illustrated in  FIG.  3 C , template data specifying notification template  330  may include template content  332  specific only to the merchant involved in the authorized transactions (e.g., Nordstrom™), and additional template content  334  specific to both the merchant involved in the authorized transaction (e.g., Nordstrom™) and a temporal interval during which user  101  initiated the authorized transaction (e.g., October 1st-October 31st). For example, additional template content  334  include, but is not limited to, promotional material that incentives user  101  to initiate additional purchases at the merchant during the temporal interval. 
     As further illustrated in  FIG.  3 C , template content  332  may also include placeholder data (e.g., metadata pointers or tags) identifying discrete and corresponding elements of stored data characterizing the authorized purchase transaction, the customer, and/or the merchant. For example, template content  322  may include placeholder data  336 , which identifies a given name of the customer involved in the authorized purchase transaction, placeholder data  338 , which identifies a location of the merchant involved in the authorized purchase transaction, and placeholder data  340 , which identifies a transaction date associated with the authorized purchase transaction. In some aspects, described herein, template population module  324  may perform operations that populate notification template  330  by replacing each of additional information elements  336 ,  338 , and  340  with the corresponding identified elements of the stored transaction, customer, and/or merchant data. 
     Referring back to  FIG.  3 B , to populate placeholder data  336  with the given name of user  101  (e.g., the customer involved in the authorized transaction), template population module  324  may access customer database  182  and identify one or more customer data records  326  associated with device identifier  304 A. Template population module  324  may parse extracted data records  326  to obtain customer data  336 A identifying a given name of user  101  (e.g., “James”), and modify an additional portion of notification template data  322  to replace placeholder data  336  with customer data  336 A. 
     In further instances, and to populate placeholder data  338  with the location of merchant  121  (e.g., the merchant location involved in the authorized transaction), template population module  324  may access merchant database  184 , and identify one or more merchant data records  328  associated with terminal identifier  304 B. Template population module  324  may parse extracted data records  328  to obtain merchant data  338 A identifying the location of merchant  121  (e.g., “Washington, D.C.”), and modify a portion of notification template data  322  to replace placeholder data  338  with merchant data  338 A. 
     In further instances, and to populate placeholder data  340  with the transaction data associated with the authorized transaction, template population module  324  may access transaction data  304 C within stored contextual data  304 , and extract, from transaction data  304 C, temporal data  340 A specifying the transaction date of the authorized transaction (e.g., “Oct. 28, 2017”). Template population module  324  may modify another portion of notification template data  322  to replace placeholder data  340  with temporal data  340 A. 
       FIG.  3 D  is a schematic diagram a schematic diagram illustrating exemplary notification template  330  populated with corresponding ones of customer data  336 A (e.g., the given name of “James” associated with user  101 ), merchant data  338 A (e.g., the “Washington, D.C.,” location of merchant  121 ), and temporal data  340 A (e.g., the transaction date of “Oct. 28, 2017”). Further, although not depicted in  FIGS.  3 C and  3 D , template population module  324  may perform any of the exemplary processes described herein to populate any additional or alternate placeholder data within notification template  330  with corresponding elements of stored customer, merchant, and/or transaction data (e.g., from one or more of customer database  182 , merchant database  184 , or contextual data store  186 ). 
     Referring back to  FIG.  3 B , template population module  324  may generate contextual notification data  342  that includes the populated notification template and additionally or alternatively, one or more portions of the formatting data that establishes visual characteristics and/or positions of specific elements of populated template content when rendered for display on the corresponding interface. Template population module  324  may provide contextual notification data  342  and an input to a delivery module  344 , which may identify a network address that identifies client device  102  (e.g., an IP address or a MAC address specified within device identifier  304 A), and transmit contextual notification data  342  across network  120  to the identified network address, e.g., using any of the communications protocols outlined above. 
     In certain aspects, a programmatic interface established and maintained by client device  102 , such as application programming interface (API)  346 , may receive contextual notification data  342  from contextual notification system  180 . By way of example, API  346  may be associated with, and established and maintained by a display module  346  of client device  102 , and may facilitate direct, module-to-module communications between delivery module  344  of contextual notification system  180  and display module  346 . API  346  may provide contextual notification data  342  as an input to display module  346  executed by client device  102 . 
     By way of example, display module  346  may be associated with one or more application programs executed by client device  102 , such as the payment application described herein, and display module  346  may be configured to perform operations that extract, from contextual notification data  342 , populated template content  342 A and formatting data  342 B. In some instances, display module  346  may provide populated template content  342 A and formatting data  342 B as inputs to an interface element generation module  348 , which may process populated template content  342 A to generate one or more interface elements  350  that reflect populated template content  342 A and further, that are formatted in accordance with formatting data  342 B. In some aspects, interface element generation module  252  may provide interface elements  350  to display unit  127 A, which may present interface elements  350  to user  101  within a graphical user interface (GUI)  352 . 
     In some aspects, and using any of the exemplary processes described herein, an application program executed by client device  102 , such as a payment application, may cause client device  102  to exchange data with a POS terminal over a direct communications channel. As described herein, the exchange of data may initiate and facilitate a purchase transaction, and issuer system  160  may perform any of the exemplary processes described herein to authorize the purchase transaction and provide data establishing a context of the authorized purchase transaction to an additional system operating within environment  100 , such as contextual notification system  180 . 
     Based on the contextual data, contextual notification system  180  may perform any of the exemplary processes described herein to access and load a notification template consistent with the established transaction context, and to populate the loaded notification template with specific elements of data characterizing a customer involved in the authorized transaction or a merchant involved in the authorized transaction, along with additional elements of the contextual data. In some aspects, contextual notification system  180  may provide data characterizing the populated notification template to client device  102  through a programmatic interface maintained by the executed application program, e.g., the payment application, and client device  102  may render the data characterizing the populated notification template for presentation within a GUI native to, and generated by, the executed application program. 
     Certain of the exemplary, computer-implemented processes described herein automatically generate template-based notifications of contextual and temporal relevance to an authorized purchase transaction, and provide these generated template-based notifications to a network-connected device that initiated the purchase transaction contemporaneously with the authorization of the purchase transaction, e.g., through application-to-application communication channels established via programmatic interfaces. In some aspects, by facilitating post-transaction messaging through application-to-application communications channels, certain of the disclosed embodiments may reduce the computational load on computer systems maintained by payment networks and issuers of payment instruments and further, reduce a potential exploitation of the contextual notifications by malicious third parties operating within the computing environment. 
     Further, certain of the exemplary, computer-implemented processes generate notification data by populating one or more accessible notification templates with corresponding elements of customer data, merchant data, or contextual data characterizing an authorized transaction. As described above, the notification templates may include digital content (e.g., textual content, graphical content, etc.) specific to particular merchants or to certain parameter values that characterize the authorized purchase transaction (e.g., digital content having seasonal relevance) and in some instances, computing systems maintained by the particular merchants may provide template data specifying these notification templates to contextual notification system  180 , or curate template data specifying additional or alternate notification templates, at regular or predetermined intervals, or in response occurrences of various events. In other aspects, described below in reference to  FIG.  4   , certain exemplary computer-implemented processes generate notification data based not on predefined notification templates, but based on dynamically generated notification templates generated that reflect, and are customized to, one or more demographic characteristics of a customer or a merchant involved in an authorized purchase transaction and additionally or alternatively, one or more parameter values that characterize the initiated purchase transaction. 
     Referring to  FIG.  4   , contextual notification system  180  may receive, through API  308 , contextual data  304  that characterizes a transaction authorized by issuer system  160 , and API  308  may receive and route contextual data  304  to management module  310 , which may perform operations that store all or a portion of contextual data  304  within one or more tangible, non-transitory memories, e.g., within contextual data store  186 . As illustrated in  FIG.  4   , contextual data  304  may include, but is not limited to, an identifier of client device  102  (e.g., device identifier  304 A), and identifier of POS terminal  122  (e.g., terminal identifier  304 B), and values of transaction parameters that characterize the authorized purchase (e.g., transaction data  304 C, which includes, but is not limited to, the transaction amount, the identifier of the purchased product, and/or the transaction date or time). In certain aspects, a registration confirmation module  312  of contextual notification system  180  may access portions of stored contextual data  304 , and perform any of the exemplary processes described herein to determine that user  101  and/or merchant  121  registered (e.g., “opted-in”) to participate in certain exemplary contextual notification processes. 
     In response to the determination that user  101  and/or merchant  121  opted-in to participate in the contextual notification processes described herein, registration confirmation module  312  may generate confirmation data  318  that includes information confirming the participant status of user  101  and/or merchant  121 , along with device identifier  304 A and terminal identifier  304 B. In some aspects, registration confirmation module  312  may provide confirmation data  318  as an input to a template generation module  402 , which may generate a notification template consistent with, and appropriate, to one or more demographic characteristics of, user  101  or merchant  121 , one or more demographic characteristics of merchant  121 , and additionally or alternatively, one or more parameter values that characterize the authorized transaction. 
     For example, template generation module  402  may receive confirmation data  318 , and may process registration data  318  to extract device identifier  304 A. Template generation module  402  may also perform operations that access customer database  182 , and load one or more elements of customer demographic data  404  that are associated with, or linked to, the device identifier  304 A and/or the identifier of user  101  within customer database  182 . In some aspects, customer demographic data  404  may specify values, or ranges of values, that characterize certain demographic characteristics exhibited by user  101 . These demographic characteristics may include, but are not limited to, age, gender, educational level, occupation, income, residence, native, spoken, or preferred language, civil or marital status, or number of children, and contextual notification system  180  may receive portions of customer demographic data  404  from client device  102  during any of the exemplary registration processes described herein (e.g., as input provided to client device  102  by user  101 ). 
     Further, template generation module  402  may perform similar operations that access merchant database  184 , and load one or more elements of merchant demographic data  406  that are associated with, or linked to, terminal identifier  304 B and/or the identifier of merchant  121  within merchant database  184 . In some aspects, merchant demographic data  406  may specify values, or ranges of values, that characterize certain demographic characteristics exhibited by merchant  121 , such as, but not limited to, a merchant type, a class of products sold by the merchant, a merchant location, or operational characteristics of the merchant, such as operating hours. 
     Template generation module  402  may perform additional operations that access template data store  188 , and extract structural data  408  identifying and characterizing a structure of one or more notification templates generated dynamically through the exemplary processes described herein. For example, structural data  408  may specify that the dynamically generated templates include, among other things, a textual greeting appropriate to a corresponding customer, textual content that identifies and thanks the corresponding customer for an authorized transaction, additional elements of digital content consistent with, and appropriate to, the demographic characteristics of the customer. 
     Further, in some aspects, template generation module  402  may also perform operations that access content data store  190 , and extract one or more elements  410  of digital content that are appropriate to and associated with customer demographic data  404  and/or merchant demographic data  406 , appropriate to portions of transaction data  304 C, and further, are consistent with the template structure specified within structural data  408 . For example, and as described above, content data store  190  may include a plurality of elements of digital content suitable for incorporation into the dynamically generated notification templates described herein, and may maintain, for each of the digital content elements, additional data (e.g., metadata) associating that digital content elements with one or more customer demographic characteristics. 
     By way of example, a digital content element referencing Victoria Day may be associated with metadata specifying that digital content element to customers residing in Canada, while a similar digital content element that references Memorial Day may be associated with metadata specifying that digital content element to customers residing in the United States. In additional examples, certain digital content elements may include audible or textual content in French, and may be associated with metadata that specifying these digital content elements to customers residing in Francophone regions or that identify French as a native or preferred language. In further examples, digital content elements referencing certain luxury products, such as luxury automobiles or watches, may be associated with metadata that identifies a certain income, educational, and/or age characteristic. Further, in some instances, one or more of the digital content elements may be tailored to specific age groups or educational levels (e.g., informal textual greeting that include a customer&#39;s given name or more formal greetings that include certain titles of respect, such as “Mr.,” “Ms.,” “Dr.,” etc.). These disclosed embodiments are, however, not limited to these examples of digital content elements and associated demographic characteristics, and in other aspects, content data store  190  may include elements of digital content associated with any additional or alternate customer demographic characteristics, merchant demographic characteristics, and/or parameter values that characterize the authorized transaction, such as a transaction date. 
     Template generation module  402  may perform operations that, in accordance with structural data  408 , combine extracted digital content elements  410  to generate dynamically a notification template that is customized to reflect the demographic characteristics of user  101  and/or merchant  121 , and output dynamic template data  412  that characterizes the dynamically generated notification template. In additional aspects, and consistent with the disclosed embodiments, the dynamically generated notification template may also be customized to reflect one or more of the transaction parameters that characterize the authorized transaction, such as a transaction data (e.g., as specified within transaction data  304 C). Further, and as described above, dynamic template data  412  that characterizes the dynamically generated notification template may specify or identify the extracted elements of digital content (e.g., digital content elements  410 , as described above), along with formatting data that establishes visual characteristics (e.g., a font size of the textual content) and/or positions of the one or more elements of digital content when rendered for display on a corresponding interface. 
     In some aspects, template generation module  402  may provide dynamic template data  412  as an input to template population module  324 , which may perform any of the exemplary processes described herein to populate the dynamically generated notification template with additional data characterizing the authorized transaction, user  101 , and/or merchant  121 . For example, and as described above, dynamic template data  412  may include, at corresponding positions within the digital content, placeholder data (e.g., metadata pointers or tags) that references corresponding elements stored data characterizing the authorized transaction, user  101 , and/or merchant  121  (e.g., within transaction data  304 C, customer database  182 , or merchant database  184 ). Using any of the exemplary processes described herein, template population module  324  can perform operations that parse dynamic template data  412 , detect the occurrences of each placeholder data element, and based on the placeholder data elements, access and load the corresponding elements stored transaction, customer, and/or merchant data from the one or more tangible, non-transitory memories. Template population module  324  may perform further operations that populate the dynamically generate notification template by replacing each of the placeholder data elements within dynamic template data  412  with the corresponding elements of the stored transaction, customer, and/or merchant data. 
     In some aspects, template population module  324  may generate contextual notification data  414  that includes the populated notification template and additionally or alternatively, one or more portions of the formatting data that establishes visual characteristics and/or positions of specific elements of populated template content when rendered for display on the corresponding interface. Template population module  324  may provide contextual notification data  414  and an input to a delivery module  344 , which may identify a network address that identifies client device  102  (e.g., an IP address or a MAC address specified within device identifier  304 A), and transmit contextual notification data  414  across network  120  to the identified network address, e.g., using any of the communications protocols outlined above. Client device  102  may perform any of the exemplary processes described above to render and present portions of contextual notification data  414  on a corresponding interface, such as a GUI generated by the executed payment application. 
     In certain of the exemplary embodiments, contextual notification system  180  may be configured to receive contextual data from issuer system  160  that characterizes a newly authorized transaction. In response to the received contextual data, contextual notification system  180  may perform any of the exemplary processes described above to access or generate an appropriate notification template, and to populate that access or generated notification template with corresponding portions of transaction, customer, and/or merchant data. As described herein, contextual notification system  180  may establish a communications channel with client device  102  (e.g., via API  346 , as established and maintained by the executed payment application), and transmit data characterizing the populated notification template for presentation on a corresponding interface. 
     While these exemplary processes facilitate provision of notification data that is both contextually and temporally relevant to an authorized transaction, contextual notification system  180  may be configured to initiate the access or generation of the notification template only after a successful authorization of the initiated transaction by issuer system  160  and the receipt of contextual data characterizing the authorized transaction. In additional exemplary embodiments, described below in reference to  FIG.  5   , contextual notification system  180  may be configured to perform operations that access or generate the appropriate notification template in parallel with the authorization of the initiated transaction by issuer system  160 . As outlined below, contextual notification system may store (e.g., “cache”) the accessed or generated notification template in a locally accessible memory until receipt from issuer system  160  of the contextual data characterizing the authorized transaction, which causes contextual notification system  180  to retrieve the cached notification template and populate the cached notification template using any of the processes describe herein. 
     Referring to  FIG.  5   , payment module  202  may perform any of the exemplary processes described above to generate and transmit payment data (e.g., payment data  208  of  FIG.  2 A ) across communications channel  120 A to POS terminal  122  using any of the short-range communications protocols outlined above. Further, through the establishment of communications channel  120 A, client device  102  may determine a unique identifier of POS terminal  122 , such as an IP address, a MAC address, or another appropriate network identifier, and may store that unique identifier within a corresponding tangible, non-transitory memory (e.g., within a portion of data repository  106 ). 
     In some aspects, payment module  202  may perform additional operations that access and load, from corresponding portions of data repository  106 , device data  502  that uniquely identifies client device  102  within communications network  120  (e.g., an IP address, a MAC address, etc.) and terminal data  504  that uniquely identifies POS terminal  122  (e.g., the determined IP address, MAC address, or network identifier described above). Payment module  202  may package portions of device data  502  and terminal data  504  into a corresponding pre-staging package  506 , and transmit pre-staging package  506  across network  120  to a corresponding network address of contextual notification system  180  (e.g., as maintained within data repository  106 ). 
     A programmatic interface established and maintained by contextual notification engine  180 , such as API  308 , may receive and route pre-staging package  506  to a management module  310 , which may store all or a portion of pre-staging package  506  within one or more tangible, non-transitory memories. As described above, API  308  may facilitate module-to-module communications between payment module  202  of client device  102  and management module  310  of contextual notification system  180 . Further, management module  310  may perform operations that route pre-staging package  506 , which includes the identifiers of client device  102 , to registration confirmation module  312 , which may perform any of the exemplary processes described above (e.g., in reference to  FIGS.  3 A and  4   ) to confirm the participant status of user  101  and/or merchant  121 , and generate corresponding confirmation data, such as confirmation data  508 , indicative of the confirmation. 
     In some aspects, template selection module  320  may receive confirmation data  318 , and may perform any of the exemplary processes described herein to identify a stored notification template that is specific to, or consistent with, user  101  or merchant  121 , and to extract template data (e.g., from template data store  188 ) characterizing the identified notification template. In other aspects, template generation module  402  may receive registration data  318 , and may perform any of the exemplary processes described herein to generate dynamically a notification template specific to, or consistent with, user  101  or merchant  121 , and to output template data that characterizes the dynamically generated notification template. In further aspects, illustrated in  FIG.  5   , template selection module  320  or template generation module  402  of contextual notification system  180  may store the generated template data within one or more tangible, non-transitory memories to establish cached template data  510   
     In some embodiments, and based on pre-staging package  506 , template selection module  320  or template generation module  402  may perform operations that identify or generate the notification template, extract or output the corresponding template data, and store that template data within the one or more tangible, non-transitory memories to establish cached template data  510  in parallel with the authorization of the initiated transaction by issuer system  160 , and prior to receipt of contextual data  304  characterizing the authorized transaction. Upon receipt of contextual data  304  from issuer system  160 , template population module  324  may access cached template data  510 , and may perform any of the exemplary processes described above to populate portions of cached template data  324  with corresponding elements of transaction, customer, or merchant. Further, although not illustrated in  FIG.  5   , contextual notification system  180  may perform any of the exemplary processes described herein to transmit data characterizing the populated notification template to client device  102 , e.g., through API  346 , for rendering and presentation through a corresponding interface. 
     Certain of these exemplary computer-implemented processes, which select or generate an appropriate notification template in parallel with the authorization of an initiated transaction by an issuer system, can be implemented in addition to, or as an alternate to, other exemplary computer-implemented processes that select or generate the appropriate notification template after receipt of contextual data characterizing the authorized transaction. In some aspects, the selection or generation of the notification template in parallel with the transaction authorization can reduce a temporal delay between the transaction authorization and a transmission of a contextual notification to a client device that initiated the transaction, and can further establish a temporal relevance of the contextual notification to the authorized transaction. 
       FIG.  6    is a flowchart of an exemplary process  600  for generating notifications of contextual and temporal relevance to authorized data exchanges, in accordance with the disclosed embodiments. In certain aspects, and as described above, the data exchange may facilitate a secure, real-time authorization of a transaction initiated at a network-connected device, such as POS terminal  122  of  FIG.  1   . For example, the initiated transaction may correspond to a purchase transaction in which a customer, e.g., user  101  of  FIG.  1   , purchases a good or service from a merchant, e.g., merchant  121 , at an agreed-upon price (e.g., a transaction amount). In certain instances, and as described above, POS terminal  122  may establish a direct channel of communications (e.g., communications channel  120 A of  FIG.  1   ) with a client device (e.g., client device  102  of  FIG.  1   ), which may be operated by user  101  and configured to execute an application program, such as the payment application described above. 
     POS terminal  122  may perform operations that program a selectively encrypted (and/or tokenized) request to authorize the initiated transaction to a computing system that issues a payment instrument involved in the initiated transaction (e.g., issuer system  160 ). In conjunction with through one or more intermediaries (e.g., through acquirer system  130 , payment network system  140 , and/or tokenization system  170 ), issuer system may perform operations that authorize the initiated transaction and relay a confirmation of the authorized transaction to POS terminal  122 . In further aspects, issuer system  160  may also generate additional data that establishes a context of the authorized transaction, e.g., contextual data, and transmit that contextual data to a computing system operating in environment  100  and configured to generate notifications of contextual and temporal relevance to the authorized transaction, e.g., contextual notification system  180 . In some examples, contextual notification system  180  may perform the steps of exemplary process  600 . 
     Referring to  FIG.  6   , contextual notification system  180  may receive, from issuer system  160 , contextual data that characterizes the authorized transaction (e.g., in step  602 ). As described herein, the contextual data may include an identifier of client device  102 , an identifier of POS terminal  122 , and values of transaction parameters that characterize the authorized transaction (a transaction amount, an identifier of a purchased product or service, a transaction date or time, etc.). In some instances, contextual notification system  180  may perform operations that store all or a part of the received contextual data within one or more tangible, non-transitory memories. 
     In response to the received contextual data, contextual notification system  180  may perform any of the exemplary processes described herein to determine whether user  101  and/or merchant  121  registered (e.g., “opted-in”) to participate in the exemplary contextual notification processes (e.g., in step  604 ). If contextual notification system  180  were to determine that user  101  is not registered to receive contextual notifications, or alternatively, that merchant  121  is not registered to provide contextual notifications (e.g., step  604 ; NO), contextual notification system  180  may generate a message declining the received contextual data, and transmit the generated message across network  120  using any of the communications protocols described herein (e.g., in step  606 ). Contextual notification system  180  may also perform operations that discard the received contextual data (e.g., in accordance with one or more risk management protocols). Exemplary process  600  is then complete in step  608 . 
     Alternatively, if contextual notification system  180  were to determine that both user  101  and/or merchant  121  opted-in to participate in contextual notification processes (e.g., step  604 ; YES), contextual notification system  180  may obtain data characterizing a notification template that is appropriate to, and consistent with, the transaction parameters of the authorized transaction, merchant data characterizing merchant  121 , and/or customer data characterizing user  101  (e.g., in step  610 ). In one aspect, in step  610 , contextual notification system  180  may perform any of the exemplary processes described herein to identify and load the notification template data from a corresponding tangible, non-transitory memory (e.g., from template data store  188  of  FIG.  1   ). In another aspect, in step  610 , contextual notification system  180  may perform any of the exemplary processes described herein to generate dynamically the notification template based on demographic data characterizing user  101  and/or merchant  121 , and to output notification template data that characterizes the dynamically generated notification template. 
     As described herein, the notification template data may include or specify one or more elements of digital content (e.g., textual content, graphics, audio-visual content, etc.), along with formatting data that establishes visual characteristics (e.g., a font size of the textual content) and/or positions of the one or more digital content elements when rendered for display on a corresponding interface. Further, and as described herein, the notification template data may also include, at corresponding positions within the digital content elements, placeholder data (e.g., metadata pointers or tags) that references corresponding elements of stored transaction, customer, and/or user data (e.g., as maintained within contextual data store  186 , customer database  182 , and merchant database  184  of  FIG.  1   ). 
     Referring back to  FIG.  6   , contextual notification system  180  may perform any of the exemplary processes described herein to populate portions of the loaded or generated notification template with corresponding elements of transaction, customer, and/or user data (e.g., in step  612 ). For example, in step  612 , to populate the loaded or generated notification template, contextual notification system  180  may perform operations that parse the notification template data, detect the occurrences of each placeholder data element within the notification template data, and based on the placeholder data, access and load the corresponding elements of the stored transaction, customer, and/or merchant data from the one or more tangible, non-transitory memories (e.g., from one or more of customer database  182 , merchant database  184 , or contextual data store  186 ). Contextual notification system  180  may perform any of the exemplary processes described herein to populate the loaded or generated notification template by replacing each of the placeholder data elements within the notification template data with the corresponding elements of the stored transaction, customer, and/or merchant data. 
     Contextual notification system  180  may also generate contextual notification data (e.g., in step  614 ). As described herein, the contextual notification data may include, but is not limited to, the populated notification template data. The contextual data may also include one or more portions of the formatting data that establishes visual characteristics and/or positions of specific elements of digital content within the populated notification template when rendered for display on the corresponding interface. 
     In some aspects, contextual notification system  180  may perform any of the exemplary processes described herein to transmit the contextual notification data across network  120  to the identified network address of client device  102 , e.g., using any of the communications protocols outlined above. (e.g., in step  616 ). Exemplary process  600  is then complete in step  608 . 
     III. Exemplary Hardware and Software Implementations 
     Embodiments of the subject matter and the functional operations described in this specification can be implemented in digital electronic circuitry, in tangibly-embodied computer software or firmware, in computer hardware, including the structures disclosed in this specification and their structural equivalents, or in combinations of one or more of them. Embodiments of the subject matter described in this specification, including payment module  202 , transaction initiation module  210 , authorization request module  212 , routing modules  220 ,  222 ,  224 ,  234 , and  306 , request management module  226 , decryption module  230 , token redemption module  234 , authorization decision module  242 , confirmation module  248 , transaction confirmation module  252 , interface element generation modules  254  and  348 , contextual notification module  302 , management module  310 , registration confirmation module  312 , template selection module  320 , template population module  324 , delivery module  344 , display module  346 , and/or template generation module  402 , can be implemented as one or more computer programs, i.e., one or more modules of computer program instructions encoded on a tangible non-transitory program carrier for execution by, or to control the operation of, a data processing apparatus (or a computer system). Additionally or alternatively, the program instructions can be encoded on an artificially-generated propagated signal, such as a machine-generated electrical, optical, or electromagnetic signal that is generated to encode information for transmission to suitable receiver apparatus for execution by a data processing apparatus. The computer storage medium can be a machine-readable storage device, a machine-readable storage substrate, a random or serial access memory device, or a combination of one or more of them. 
     The terms “apparatus,” “device,” and “system” refer to data processing hardware and encompass all kinds of apparatus, devices, and machines for processing data, including by way of example a programmable processor, a computer, or multiple processors or computers. The apparatus, device, or system can also be or further include special purpose logic circuitry, such as an FPGA (field programmable gate array) or an ASIC (application-specific integrated circuit). The apparatus, device, or system can optionally include, in addition to hardware, code that creates an execution environment for computer programs, such as code that constitutes processor firmware, a protocol stack, a database management system, an operating system, or a combination of one or more of them. 
     A computer program, which may also be referred to or described as a program, software, a software application, a module, a software module, a script, or code, can be written in any form of programming language, including compiled or interpreted languages, or declarative or procedural languages, and it can be deployed in any form, including as a stand-alone program or as a module, component, subroutine, or other unit suitable for use in a computing environment. A computer program may, but need not, correspond to a file in a file system. A program can be stored in a portion of a file that holds other programs or data, such as one or more scripts stored in a markup language document, in a single file dedicated to the program in question, or in multiple coordinated files, such as files that store one or more modules, sub-programs, or portions of code. A computer program can be deployed to be executed on one computer or on multiple computers that are located at one site or distributed across multiple sites and interconnected by a communication network. 
     The processes and logic flows described in this specification can be performed by one or more programmable computers executing one or more computer programs to perform functions by operating on input data and generating output. The processes and logic flows can also be performed by, and apparatus can also be implemented as, special purpose logic circuitry, such as an FPGA (field programmable gate array) or an ASIC (application-specific integrated circuit). 
     Computers suitable for the execution of a computer program include, by way of example, general or special purpose microprocessors or both, or any other kind of central processing unit. Generally, a central processing unit will receive instructions and data from a read-only memory or a random access memory or both. The essential elements of a computer are a central processing unit for performing or executing instructions and one or more memory devices for storing instructions and data. Generally, a computer will also include, or be operatively coupled to receive data from or transfer data to, or both, one or more mass storage devices for storing data, such as magnetic, magneto-optical disks, or optical disks. However, a computer need not have such devices. Moreover, a computer can be embedded in another device, such as a mobile telephone, a personal digital assistant (PDA), a mobile audio or video player, a game console, a Global Positioning System (GPS) receiver, or a portable storage device, such as a universal serial bus (USB) flash drive, to name just a few. 
     Computer-readable media suitable for storing computer program instructions and data include all forms of non-volatile memory, media and memory devices, including by way of example semiconductor memory devices, such as EPROM, EEPROM, and flash memory devices; magnetic disks, such as internal hard disks or removable disks; magneto-optical disks; and CD-ROM and DVD-ROM disks. The processor and the memory can be supplemented by, or incorporated in, special purpose logic circuitry. 
     To provide for interaction with a user, embodiments of the subject matter described in this specification can be implemented on a computer having a display device, such as a CRT (cathode ray tube) or LCD (liquid crystal display) monitor, for displaying information to the user and a keyboard and a pointing device, such as a mouse or a trackball, by which the user can provide input to the computer. Other kinds of devices can be used to provide for interaction with a user as well; for example, feedback provided to the user can be any form of sensory feedback, such as visual feedback, auditory feedback, or tactile feedback; and input from the user can be received in any form, including acoustic, speech, or tactile input. In addition, a computer can interact with a user by sending documents to and receiving documents from a device that is used by the user; for example, by sending web pages to a web browser on a user&#39;s device in response to requests received from the web browser. 
     Implementations of the subject matter described in this specification can be implemented in a computing system that includes a back-end component, such as a data server, or that includes a middleware component, such as an application server, or that includes a front-end component, such as a client computer having a graphical user interface or a Web browser through which a user can interact with an implementation of the subject matter described in this specification, or any combination of one or more such back-end, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication, such as a communication network. Examples of communication networks include a local area network (LAN) and a wide area network (WAN), such as the Internet. 
     The computing system can include clients and servers. A client and server are generally remote from each other and typically interact through a communication network. The relationship of client and server arises by virtue of computer programs running on the respective computers and having a client-server relationship to each other. In some implementations, a server transmits data, such as an HTML page, to a user device, such as for purposes of displaying data to and receiving user input from a user interacting with the user device, which acts as a client. Data generated at the user device, such as a result of the user interaction, can be received from the user device at the server. 
     While this specification includes many specifics, these should not be construed as limitations on the scope of the invention or of what may be claimed, but rather as descriptions of features specific to particular embodiments of the invention. Certain features that are described in this specification in the context of separate embodiments may also be implemented in combination in a single embodiment. Conversely, various features that are described in the context of a single embodiment may also be implemented in multiple embodiments separately or in any suitable sub-combination. Moreover, although features may be described above as acting in certain combinations and even initially claimed as such, one or more features from a claimed combination may in some cases be excised from the combination, and the claimed combination may be directed to a sub-combination or variation of a sub-combination. 
     Similarly, while operations are depicted in the drawings in a particular order, this should not be understood as requiring that such operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed, to achieve desirable results. In certain circumstances, multitasking and parallel processing may be advantageous. Moreover, the separation of various system components in the embodiments described above should not be understood as requiring such separation in all embodiments, and it should be understood that the described program components and systems may generally be integrated together in a single software product or packaged into multiple software products. 
     In each instance where an HTML file is mentioned, other file types or formats may be substituted. For instance, an HTML file may be replaced by an XML, JSON, plain text, or other types of files. Moreover, where a table or hash table is mentioned, other data structures (such as spreadsheets, relational databases, or structured files) may be used. 
     Various embodiments have been described herein with reference to the accompanying drawings. It will, however, be evident that various modifications and changes may be made thereto, and additional embodiments may be implemented, without departing from the broader scope of the disclosed embodiments as set forth in the claims that follow. 
     Further, other embodiments will be apparent to those skilled in the art from consideration of the specification and practice of one or more embodiments of the present disclosure. It is intended, therefore, that this disclosure and the examples herein be considered as exemplary only, with a true scope and spirit of the disclosed embodiments being indicated by the following listing of exemplary claims.