Patent Publication Number: US-2023144086-A1

Title: Method, System, and Computer Program Product for Configuring a Gateway

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation of U.S. patent application Ser. No. 17/553,966, filed Dec. 17, 2021, which is a continuation of U.S. patent application Ser. No. 16/054,287, filed Aug. 3, 2018, which issued as U.S. Pat. No. 11,233,700 on Jan. 25, 2022, the disclosures of which are hereby incorporated by reference in its entireties. 
    
    
     BACKGROUND 
     1. Field 
     This disclosed subject matter relates generally to methods, systems, and products for configuring a gateway and, in some particular embodiments or aspects, to a method, system, and computer program product for dynamically configuring a payment gateway. 
     2. Technical Considerations 
     Certain computer systems may use configuration files to control certain functionality. For example, certain gateways (e.g., payment gateways) may use configuration files (e.g., Extensible Markup Language (XML) files and/or the like) for certain gateway functions (e.g., validation rules, transformation, response code to error code mapping, and/or the like). Such configuration files may be packaged with the application/module (e.g., gateway application) that is deployed on the gateway. As such, if a change is to be made to the configuration files or a portion thereof (e.g., a change to the validation rules, transformation, code mapping, and/or the like), an entirely new application package (including the modified configuration file) must be deployed on every node (e.g., server) using the application. However, certain computer systems (e.g., payment gateways) may employ multiple nodes (e.g., tens of nodes, 50 nodes, 75-80 nodes, hundreds of nodes, and/or the like). It can be burdensome/expensive in terms of computing resources and time consuming to individually deploy such application packages to all of the nodes. Additionally or alternatively, it may be necessary to bring the node (e.g., server) offline while the new application package is being deployed thereto. Additionally or alternatively, if the changes to the configuration files are relatively small (e.g., changes to only one or two files), it can be counterproductive to build an entire new application package and deploy the (relatively large) application package to each node (e.g., using a relatively large amount of computing resources to implement a relatively small change in the configuration files). 
     Additionally or alternatively, certain computer systems (e.g., payment gateways) may process a relatively large volume of data (e.g., transactions) very quickly (e.g., in a relatively short period of time). For example, a payment gateway may continuously process thousands of transactions in short time periods (e.g., 2,000-4,000 per ten seconds). However, if the aforementioned time-consuming process of deploying new application packages is used to implement modifications to the configuration files, the time elapsed may result in many (e.g., thousands) of transactions being processed with outdated configuration files. For example, transactions that should be validated based on the current configuration files may be rejected because the node at which such transactions are processed is still using previous configuration files during the time while the application packages are being deployed. Additionally or alternatively, transactions that should be rejected based on the current configuration files may be validated because the node at which such transactions are processed is still using previous configuration files during the time while the application packages are being deployed. 
     SUMMARY 
     Accordingly, it is an object of the presently disclosed subject matter to provide methods, systems, and computer program products for configuring a gateway. 
     According to non-limiting embodiments or aspects, provided is a method for configuring a gateway. In some non-limiting embodiments or aspects, a method for configuring a gateway may include monitoring, by a gateway, current version data stored on at least one first server. The current version data may be associated with a current version of a configuration file for the gateway. The first server(s) may be remote from the gateway. At the first server(s), the current version data may be modified. The gateway may determine that the current version data stored on the at least one first server has been modified. In response to that determination, a configuration service may be invoked. The configuration service may retrieve the current version of the configuration file from at least one repository based on the current version data. The repository may include at least one second server remote from the gateway and the first server(s). The gateway may store a copy of the current version of the configuration file retrieved by the configuration service. 
     In some non-limiting embodiments or aspects, monitoring the current version data may include monitoring, by a first agent on the gateway, a view of the current version data from a second agent on the at least one first server. Additionally or alternatively, determining the current version data stored on the at least one first server has been modified may include detecting, by the first agent, that the view of the current version data has been modified. Additionally or alternatively, the first agent may include a client agent of a cluster, and the second agent may include a server agent of the cluster. 
     In some non-limiting embodiments or aspects, the current version data may include at least one key associated with at least one identifier of the configuration file and/or at least one value associated with the current version. 
     In some non-limiting embodiments or aspects, determining the current version data stored on the at least one first server has been modified may include receiving, at the gateway, a notification from the first server(s) that the current version data has been modified. 
     In some non-limiting embodiments or aspects, the current version of the configuration file may be uploaded to the repository before modifying the current version data. Additionally or alternatively, the gateway may delete a copy of a previous version of the configuration file. 
     In some non-limiting embodiments or aspects, the gateway may include a payment gateway. Additionally or alternatively, the gateway may receive transaction data associated with a payment transaction. Additionally or alternatively, the gateway may validate the payment transaction based on the copy of the current version of the configuration file. 
     In some non-limiting embodiments or aspects, the current version of the configuration file may include at least one of the following: validation rules, transformation rules, error code mapping, or any combination thereof. 
     According to non-limiting embodiments or aspects, provided is a system for configuring a gateway. In some non-limiting embodiments or aspects, the system for configuring a gateway may include at least one repository, which may be configured to store a current version of a configuration file. At least one first server may be configured to store current version data associated with the current version of the configuration file. The first server(s) may be remote from the repository. A gateway may be remote from the first server(s) and the repository. The gateway may be configured to monitor the current version data stored on the at least one first server. The gateway may further be configured in response to determining that the current version data stored on the at least one first server has been modified, to invoke a configuration service. The configuration service may retrieve the current version of the configuration file from the at least one repository based on the current version data. The gateway may further be configured to store a copy of the current version of the configuration file retrieved by the configuration service. 
     In some non-limiting embodiments or aspects, the gateway may include a first agent. Additionally or alternatively, monitoring the current version data may include using the first agent, which may be configured to monitor a view of the current version data from a second agent on the first server(s). Additionally or alternatively, determining the current version data stored on the first server(s) has been modified may include the first agent (of the gateway) being configured to detect that the view of the current version data has been modified. In some non-limiting embodiments or aspects, the first agent may include a client agent of a cluster, and the second agent may include a server agent of the cluster. 
     In some non-limiting embodiments or aspects, the current version data may include at least one key associated with at least one identifier of the configuration file and at least one value associated with the current version. 
     In some non-limiting embodiments or aspects, determining the current version data stored on the at least one first server has been modified may include the gateway being configured to receive a notification from the first server(s) that the current version data has been modified. 
     In some non-limiting embodiments or aspects, the repository may be configured to have the current version of the configuration file uploaded thereto. Additionally or alternatively, the first server(s) may be configured to have the current version data thereon modified in response to the current version of the configuration file being uploaded to the repository. 
     In some non-limiting embodiments or aspects, the gateway may be configured to delete a copy of a previous version of the configuration file. 
     In some non-limiting embodiments or aspects, the gateway may include a payment gateway. Additionally or alternatively, the gateway may be configured to receive transaction data associated with a payment transaction. Additionally or alternatively, the gateway may be configured to validate the payment transaction based on the copy of the current version of the configuration file. 
     In some non-limiting embodiments or aspects, the current version of the configuration file may include at least one of the following: validation rules, transformation rules, error code mapping, or any combination thereof. 
     According to non-limiting embodiments or aspects, provided is a computer program product for configuring a gateway. The computer program product may include at least one non-transitory computer-readable medium including one or more instructions that, when executed by at least one processor, cause the at least one processor to monitor current version data stored on at least one first server. The current version data may be associated with a current version of a configuration file for a gateway. The first server(s) may be remote from the gateway. In response to determining that the current version data stored on the at least one first server has been modified, a configuration service may be invoked. The configuration service may retrieve the current version of the configuration file from at least one repository based on the current version data. The repository may include at least one second server remote from the gateway and the first server(s). A copy of the current version of the configuration file retrieved by the configuration service may be stored. 
     In some non-limiting embodiments or aspects, monitoring the current version data may include monitoring, by a first agent on the gateway, a view of the current version data from a second agent on the first server(s). Additionally or alternatively, determining the current version data stored on the first server(s) has been modified may include detecting, by the first agent, that the view of the current version data has been modified. Additionally or alternatively, the first agent may include a client agent of a cluster, and the second agent may include a server agent of the cluster. 
     In some non-limiting embodiments or aspects, the current version data may include at least one key associated with at least one identifier of the configuration file and at least one value associated with the current version. 
     In some non-limiting embodiments or aspects, determining the current version data stored on the first server(s) has been modified may include receiving a notification from the first server(s) that the current version data has been modified. 
     In some non-limiting embodiments, the current version of the configuration file may be uploaded to the repository before modifying the current version data. In some non-limiting embodiments or aspects, a copy of a previous version of the configuration file may be deleted (e.g., at the gateway). 
     In some non-limiting embodiments or aspects, the gateway may include a payment gateway. Additionally or alternatively, the instructions, when executed by the processor(s), may further cause the at least one processor to receive transaction data associated with a payment transaction and/or validate the payment transaction based on the copy of the current version of the configuration file. 
     In some non-limiting embodiments or aspects, the current version of the configuration file may include at least one of the following: validation rules, transformation rules, error code mapping, and/or any combination thereof. 
     Further embodiments or aspects are set forth in the following numbered clauses: 
     Clause 1: A method for configuring a gateway, comprising: monitoring, by a gateway, current version data stored on at least one first server, the current version data associated with a current version of a configuration file for the gateway, the at least one first server remote from the gateway; modifying, on the at least one first server, the current version data; in response to determining, by the gateway, that the current version data stored on the at least one first server has been modified, invoking a configuration service, wherein the configuration service retrieves the current version of the configuration file from at least one repository based on the current version data, the at least one repository comprising at least one second server remote from the gateway and the at least one first server; storing, by the gateway, a copy of the current version of the configuration file retrieved by the configuration service. 
     Clause 2: The method of clause 1, wherein monitoring the current version data comprises monitoring, by a first agent on the gateway, a view of the current version data from a second agent on the at least one first server. 
     Clause 3: The method of clause 1 or clause 2, wherein determining the current version data stored on the at least one first server has been modified comprises detecting, by the first agent, that the view of the current version data has been modified. 
     Clause 4: The method of any one of clauses 1-3, wherein the first agent comprises a client agent of a cluster, and the second agent comprises a server agent of the cluster. 
     Clause 5: The method of any one of clauses 1-4, wherein the current version data comprises at least one key associated with at least one identifier of the configuration file and at least one value associated with the current version. 
     Clause 6: The method of any one of clauses 1-5, wherein determining the current version data stored on the at least one first server has been modified comprises receiving, at the gateway, a notification from the at least one first server that the current version data has been modified. 
     Clause 7: The method of any one of clauses 1-6, further comprising uploading, to the at least one repository, the current version of the configuration file before modifying the current version data. 
     Clause 8: The method of any one of clauses 1-7, further comprising deleting, by the gateway, a copy of a previous version of the configuration file. 
     Clause 9: The method of any one of clauses 1-8, wherein the gateway comprises a payment gateway, the method further comprising: receiving, at the gateway, transaction data associated with a payment transaction; and validating, by the gateway, the payment transaction based on the copy of the current version of the configuration file. 
     Clause 10: The method of any one of clauses 1-9, wherein the current version of the configuration file comprises at least one of the following: validation rules, transformation rules, error code mapping, or any combination thereof. 
     Clause 11: A system for configuring a gateway, comprising: at least one repository configured to store a current version of a configuration file; at least one first server configured to store current version data associated with the current version of the configuration file, the at least one first server remote from the at least one repository; a gateway remote from the at least one first server and the at least one repository; the gateway configured to: monitor the current version data stored on the at least one first server; in response to determining that the current version data stored on the at least one first server has been modified, invoke a configuration service, wherein the configuration service retrieves the current version of the configuration file from the at least one repository based on the current version data; store a copy of the current version of the configuration file retrieved by the configuration service. 
     Clause 12: The system of clause 11, wherein the gateway comprises a first agent, and wherein monitoring the current version data comprises the first agent being configured to monitor a view of the current version data from a second agent on the at least one first server. 
     Clause 13: The system of clause 11 or clause 12, wherein determining the current version data stored on the at least one first server has been modified comprises the first agent being configured to detect that the view of the current version data has been modified. 
     Clause 14: The system of any one of clauses 11-13, wherein the first agent comprises a client agent of a cluster, and the second agent comprises a server agent of the cluster. 
     Clause 15: The system of any one of clauses 11-14, wherein the current version data comprises at least one key associated with at least one identifier of the configuration file and at least one value associated with the current version. 
     Clause 16: The system of any one of clauses 11-15, wherein determining the current version data stored on the at least one first server has been modified comprises the gateway being configured to receive a notification from the at least one first server that the current version data has been modified. 
     Clause 17: The system of any one of clauses 11-16, wherein the at least one repository is configured to have the current version of the configuration file uploaded thereto, and wherein the at least one server is configured to have the current version data thereon modified in response to the current version of the configuration file being uploaded to the at least one repository. 
     Clause 18: The system of any one of clauses 11-17, wherein the gateway is configured to delete a copy of a previous version of the configuration file. 
     Clause 19: The system of any one of clauses 11-18, wherein the gateway comprises a payment gateway, the gateway configured to: receive transaction data associated with a payment transaction; and validate the payment transaction based on the copy of the current version of the configuration file. 
     Clause 20: The system of any one of clauses 11-19, wherein the current version of the configuration file comprises at least one of the following: validation rules, transformation rules, error code mapping, or any combination thereof. 
     Clause 21: A computer program product for configuring a gateway, the computer program product comprising at least one non-transitory computer-readable medium including one or more instructions that, when executed by at least one processor, cause the at least one processor to: monitor current version data stored on at least one first server, the current version data associated with a current version of a configuration file for a gateway, the at least one first server remote from the gateway; in response to determining that the current version data stored on the at least one first server has been modified, invoke a configuration service, wherein the configuration service retrieves the current version of the configuration file from at least one repository based on the current version data, the at least one repository comprising at least one second server remote from the gateway and the at least one first server; store a copy of the current version of the configuration file retrieved by the configuration service. 
     Clause 22: The computer program product of clause 21, wherein monitoring the current version data comprises monitoring, by a first agent on the gateway, a view of the current version data from a second agent on the at least one first server. 
     Clause 23: The computer program product of clause 21 or clause 22, wherein determining the current version data stored on the at least one first server has been modified comprises detecting, by the first agent, that the view of the current version data has been modified. 
     Clause 24: The computer program product of any one of clauses 21-23, wherein the first agent comprises a client agent of a cluster, and the second agent comprises a server agent of the cluster. 
     Clause 25: The computer program product of any one of clauses 21-24, wherein the current version data comprises at least one key associated with at least one identifier of the configuration file and at least one value associated with the current version. 
     Clause 26: The computer program product of any one of clauses 21-25, wherein determining the current version data stored on the at least one first server has been modified comprises receiving a notification from the at least one first server that the current version data has been modified. 
     Clause 27: The computer program product of any one of clauses 21-26, wherein the one or more instructions, when executed by the at least one processor, further cause the at least one processor to upload, to the at least one repository, the current version of the configuration file before modifying the current version data. 
     Clause 28: The computer program product of any one of clauses 21-27, wherein the one or more instructions, when executed by the at least one processor, further cause the at least one processor to delete a copy of a previous version of the configuration file. 
     Clause 29: The computer program product of any one of clauses 21-28, wherein the gateway comprises a payment gateway, wherein the one or more instructions, when executed by the at least one processor, further cause the at least one processor to: receive transaction data associated with a payment transaction; and validate the payment transaction based on the copy of the current version of the configuration file. 
     Clause 30: The computer program product of any one of clauses 21-29, wherein the current version of the configuration file comprises at least one of the following: validation rules, transformation rules, error code mapping, or any combination thereof. 
     These and other features and characteristics of the presently disclosed subject matter, as well as the methods of operation and functions of the related elements of structures and the combination of parts and economies of manufacture, will become more apparent upon consideration of the following description and the appended claims with reference to the accompanying drawings, all of which form a part of this specification, wherein like reference numerals designate corresponding parts in the various figures. It is to be expressly understood, however, that the drawings are for the purpose of illustration and description only and are not intended as a definition of the limits of the disclosed subject matter. As used in the specification and the claims, the singular form of “a,” “an,” and “the” include plural referents unless the context clearly dictates otherwise. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Additional advantages and details of the disclosed subject matter are explained in greater detail below with reference to the exemplary embodiments or aspects that are illustrated in the accompanying figures, in which: 
         FIG.  1    is a diagram of a non-limiting embodiment or aspect of an environment in which methods, systems, and/or computer program products, described herein, may be implemented according to the principles of the presently disclosed subject matter; 
         FIG.  2    is a diagram of a non-limiting embodiment or aspect of components of one or more devices of  FIG.  1   ; 
         FIG.  3    is a flowchart of a non-limiting embodiment or aspect of a process for configuring a gateway according to the principles of the presently disclosed subject matter; and 
         FIG.  4    is a diagram of a non-limiting embodiment or aspect of an implementation of a non-limiting embodiment or aspect of the process shown in  FIG.  3   . 
     
    
    
     DESCRIPTION 
     For purposes of the description hereinafter, the terms “end,” “upper,” “lower,” “right,” “left,” “vertical,” “horizontal,” “top,” “bottom,” “lateral,” “longitudinal,” and derivatives thereof shall relate to the disclosed subject matter as it is oriented in the drawing figures. However, it is to be understood that the disclosed subject matter may assume various alternative variations and step sequences, except where expressly specified to the contrary. It is also to be understood that the specific devices and processes illustrated in the attached drawings, and described in the following specification, are simply exemplary embodiments or aspects of the disclosed subject matter. Hence, specific dimensions and other physical characteristics related to the embodiments or aspects disclosed herein are not to be considered as limiting unless otherwise indicated. 
     No aspect, component, element, structure, act, step, function, instruction, and/or the like used herein should be construed as critical or essential unless explicitly described as such. Also, as used herein, the articles “a” and “an” are intended to include one or more items and may be used interchangeably with “one or more” and “at least one.” Furthermore, as used herein, the term “set” is intended to include one or more items (e.g., related items, unrelated items, a combination of related and unrelated items, and/or the like) and may be used interchangeably with “one or more” or “at least one.” Where only one item is intended, the term “one” or similar language is used. Also, as used herein, the terms “has,” “have,” “having,” or the like are intended to be open-ended terms. Further, the phrase “based on” is intended to mean “based at least partially on” unless explicitly stated otherwise. 
     As used herein, the terms “communication” and “communicate” may refer to the reception, receipt, transmission, transfer, provision, and/or the like of information (e.g., data, signals, messages, instructions, commands, and/or the like). For one unit (e.g., a device, a system, a component of a device or system, combinations thereof, and/or the like) to be in communication with another unit means that the one unit is able to directly or indirectly receive information from and/or transmit information to the other unit. This may refer to a direct or indirect connection (e.g., a direct communication connection, an indirect communication connection, and/or the like) that is wired and/or wireless in nature. Additionally, two units may be in communication with each other even though the information transmitted may be modified, processed, relayed, and/or routed between the first and second unit. For example, a first unit may be in communication with a second unit even though the first unit passively receives information and does not actively transmit information to the second unit. As another example, a first unit may be in communication with a second unit if at least one intermediary unit (e.g., a third unit located between the first unit and the second unit) processes information received from the first unit and communicates the processed information to the second unit. In some non-limiting embodiments or aspects, a message may refer to a network packet (e.g., a data packet and/or the like) that includes data. It will be appreciated that numerous other arrangements are possible. 
     As used herein, the terms “issuer institution,” “portable financial device issuer,” “issuer,” or “issuer bank” may refer to one or more entities that provide accounts to customers for conducting transactions (e.g., payment transactions), such as initiating credit and/or debit payments. For example, an issuer institution may provide an account identifier, such as a personal account number (PAN), to a customer that uniquely identifies one or more accounts associated with that customer. The account identifier may be embodied on a portable financial device, such as a physical financial instrument, e.g., a payment card, and/or may be electronic and used for electronic payments. The terms “issuer institution” and “issuer institution system” may also refer to one or more computer systems operated by or on behalf of an issuer institution, such as a server computer executing one or more software applications. For example, an issuer institution system may include one or more authorization servers for authorizing a transaction. 
     As used herein, the term “account identifier” may include one or more types of identifiers associated with a user account (e.g., a PAN, a primary account number, a card number, a payment card number, a token, and/or the like). In some non-limiting embodiments or aspects, an issuer institution may provide an account identifier (e.g., a PAN, a token, and/or the like) to a user that uniquely identifies one or more accounts associated with that user. The account identifier may be embodied on a physical financial instrument (e.g., a portable financial instrument, a payment card, a credit card, a debit card, and/or the like) and/or may be electronic information communicated to the user that the user may use for electronic payments. In some non-limiting embodiments or aspects, the account identifier may be an original account identifier, where the original account identifier was provided to a user at the creation of the account associated with the account identifier. In some non-limiting embodiments or aspects, the account identifier may be an account identifier (e.g., a supplemental account identifier) that is provided to a user after the original account identifier was provided to the user. For example, if the original account identifier is forgotten, stolen, and/or the like, a supplemental account identifier may be provided to the user. In some non-limiting embodiments or aspects, an account identifier may be directly or indirectly associated with an issuer institution such that an account identifier may be a token that maps to a PAN or other type of identifier. Account identifiers may be alphanumeric, any combination of characters and/or symbols, and/or the like. An issuer institution may be associated with a bank identification number (BIN) that uniquely identifies the issuer institution. 
     As used herein, the terms “payment token” or “token” may refer to an identifier that is used as a substitute or replacement identifier for an account identifier, such as a PAN. Tokens may be associated with a PAN or other account identifiers in one or more data structures (e.g., one or more databases and/or the like) such that they can be used to conduct a transaction (e.g., a payment transaction) without directly using the account identifier, such as a PAN. In some examples, an account identifier, such as a PAN, may be associated with a plurality of tokens for different individuals, different uses, and/or different purposes. For example, a payment token may include a series of numeric and/or alphanumeric characters that may be used as a substitute for an original account identifier. For example, a payment token “4900 0000 0000 0001” may be used in place of a PAN “4147 0900 0000 1234.” In some non-limiting embodiments or aspects, a payment token may be “format preserving” and may have a numeric format that conforms to the account identifiers used in existing payment processing networks (e.g., ISO 8583 financial transaction message format). In some non-limiting embodiments or aspects, a payment token may be used in place of a PAN to initiate, authorize, settle, or resolve a payment transaction or represent the original credential in other systems where the original credential would typically be provided. In some non-limiting embodiments or aspects, a token value may be generated such that the recovery of the original PAN or other account identifier from the token value may not be computationally derived (e.g., with a one-way hash or other cryptographic function). Further, in some non-limiting embodiments or aspects, the token format may be configured to allow the entity receiving the payment token to identify it as a payment token and recognize the entity that issued the token. 
     As used herein, the term “provisioning” may refer to a process of enabling a device to use a resource or service. For example, provisioning may involve enabling a device to perform transactions using an account. Additionally or alternatively, provisioning may include adding provisioning data associated with account data (e.g., a payment token representing an account number) to a device. 
     As used herein, the term “token requestor” may refer to an entity that is seeking to implement tokenization according to embodiments of the presently disclosed subject matter. For example, the token requestor may initiate a request that a PAN be tokenized by submitting a token request message to a token service provider. Additionally or alternatively, a token requestor may no longer need to store a PAN associated with a token once the requestor has received the payment token in response to a token request message. In some non-limiting embodiments or aspects, the requestor may be an application, a device, a process, or a system that is configured to perform actions associated with tokens. For example, a requestor may request registration with a network token system, request token generation, token activation, token de-activation, token exchange, other token lifecycle management related processes, and/or any other token related processes. In some non-limiting embodiments or aspects, a requestor may interface with a network token system through any suitable communication network and/or protocol (e.g., using HTTPS, SOAP and/or an XML interface among others). For example, a token requestor may include card-on-file merchants, acquirers, acquirer processors, payment gateways acting on behalf of merchants, payment enablers (e.g., original equipment manufacturers, mobile network operators, and/or the like), digital wallet providers, issuers, third-party wallet providers, payment processing networks, and/or the like. In some non-limiting embodiments or aspects, a token requestor may request tokens for multiple domains and/or channels. Additionally or alternatively, a token requestor may be registered and identified uniquely by the token service provider within the tokenization ecosystem. For example, during token requestor registration, the token service provider may formally process a token requestor&#39;s application to participate in the token service system. In some non-limiting embodiments or aspects, the token service provider may collect information pertaining to the nature of the requestor and relevant use of tokens to validate and formally approve the token requestor and establish appropriate domain restriction controls. Additionally or alternatively, successfully registered token requestors may be assigned a token requestor identifier that may also be entered and maintained within the token vault. In some non-limiting embodiments or aspects, token requestor identifiers may be revoked and/or token requestors may be assigned new token requestor identifiers. In some non-limiting embodiments or aspects, this information may be subject to reporting and audit by the token service provider. 
     As used herein, the term a “token service provider” may refer to an entity including one or more server computers in a token service system that generates, processes and maintains payment tokens. For example, the token service provider may include or be in communication with a token vault where the generated tokens are stored. Additionally or alternatively, the token vault may maintain one-to-one mapping between a token and a PAN represented by the token. In some non-limiting embodiments or aspects, the token service provider may have the ability to set aside licensed BINs as token BINs to issue tokens for the PANs that may be submitted to the token service provider. In some non-limiting embodiments or aspects, various entities of a tokenization ecosystem may assume the roles of the token service provider. For example, payment networks and issuers or their agents may become the token service provider by implementing the token services according to non-limiting embodiments or aspects of the presently disclosed subject matter. Additionally or alternatively, a token service provider may provide reports or data output to reporting tools regarding approved, pending, or declined token requests, including any assigned token requestor ID. The token service provider may provide data output related to token-based transactions to reporting tools and applications and present the token and/or PAN as appropriate in the reporting output. In some non-limiting embodiments or aspects, the EMVCo standards organization may publish specifications defining how tokenized systems may operate. For example, such specifications may be informative, but they are not intended to be limiting upon any of the presently disclosed subject matter. 
     As used herein, the term “token vault” may refer to a repository that maintains established token-to-PAN mappings. For example, the token vault may also maintain other attributes of the token requestor that may be determined at the time of registration and/or that may be used by the token service provider to apply domain restrictions or other controls during transaction processing. In some non-limiting embodiments or aspects, the token vault may be a part of a token service system. For example, the token vault may be provided as a part of the token service provider. Additionally or alternatively, the token vault may be a remote repository accessible by the token service provider. In some non-limiting embodiments or aspects, token vaults, due to the sensitive nature of the data mappings that are stored and managed therein, may be protected by strong underlying physical and logical security. Additionally or alternatively, a token vault may be operated by any suitable entity, including a payment network, an issuer, clearing houses, other financial institutions, transaction service providers, and/or the like. 
     As used herein, the term “merchant” may refer to one or more entities (e.g., operators of retail businesses that provide goods and/or services, and/or access to goods and/or services, to a user (e.g., a customer, a consumer, a customer of the merchant, and/or the like) based on a transaction (e.g., a payment transaction)). As used herein, “merchant system” may refer to one or more computer systems operated by or on behalf of a merchant, such as a server computer executing one or more software applications. As used herein, the term “product” may refer to one or more goods and/or services offered by a merchant. 
     As used herein, a “point-of-sale (POS) device” may refer to one or more devices, which may be used by a merchant to initiate transactions (e.g., a payment transaction), engage in transactions, and/or process transactions. For example, a POS device may include one or more computers, peripheral devices, card readers, near-field communication (NFC) receivers, radio frequency identification (RFID) receivers, and/or other contactless transceivers or receivers, contact-based receivers, payment terminals, computers, servers, input devices, and/or the like. 
     As used herein, a “point-of-sale (POS) system” may refer to one or more computers and/or peripheral devices used by a merchant to conduct a transaction. For example, a POS system may include one or more POS devices and/or other like devices that may be used to conduct a payment transaction. A POS system (e.g., a merchant POS system) may also include one or more server computers programmed or configured to process online payment transactions through webpages, mobile applications, and/or the like. 
     As used herein, the term “transaction service provider” may refer to an entity that receives transaction authorization requests from merchants or other entities and provides guarantees of payment, in some cases through an agreement between the transaction service provider and the issuer institution. In some non-limiting embodiments or aspects, a transaction service provider may include a credit card company, a debit card company, and/or the like. As used herein, the term “transaction service provider system” may also refer to one or more computer systems operated by or on behalf of a transaction service provider, such as a transaction processing server executing one or more software applications. A transaction processing server may include one or more processors and, in some non-limiting embodiments or aspects, may be operated by or on behalf of a transaction service provider. 
     As used herein, the term “acquirer” may refer to an entity licensed by the transaction service provider and approved by the transaction service provider to originate transactions (e.g., payment transactions) using a portable financial device associated with the transaction service provider. As used herein, the term “acquirer system” may also refer to one or more computer systems, computer devices, and/or the like operated by or on behalf of an acquirer. The transactions the acquirer may originate may include payment transactions (e.g., purchases, original credit transactions (OCTs), account funding transactions (AFTs), and/or the like). In some non-limiting embodiments or aspects, the acquirer may be authorized by the transaction service provider to assign merchant or service providers to originate transactions using a portable financial device of the transaction service provider. The acquirer may contract with payment facilitators to enable the payment facilitators to sponsor merchants. The acquirer may monitor compliance of the payment facilitators in accordance with regulations of the transaction service provider. The acquirer may conduct due diligence of the payment facilitators and ensure that proper due diligence occurs before signing a sponsored merchant. The acquirer may be liable for all transaction service provider programs that the acquirer operates or sponsors. The acquirer may be responsible for the acts of the acquirer&#39;s payment facilitators, merchants that are sponsored by an acquirer&#39;s payment facilitators, and/or the like. In some non-limiting embodiments or aspects, an acquirer may be a financial institution, such as a bank. 
     As used herein, the terms “electronic wallet,” “electronic wallet mobile application,” and “digital wallet” may refer to one or more electronic devices and/or one or more software applications configured to initiate and/or conduct transactions (e.g., payment transactions, electronic payment transactions, and/or the like). For example, an electronic wallet may include a user device (e.g., a mobile device) executing an application program and server-side software and/or databases for maintaining and providing transaction data to the user device. As used herein, the term “electronic wallet provider” may include an entity that provides and/or maintains an electronic wallet and/or an electronic wallet mobile application for a user (e.g., a customer). Examples of an electronic wallet provider include, but are not limited to, Google Wallet™, Android Pay®, Apple Pay®, and Samsung Pay®. In some non-limiting examples, a financial institution (e.g., an issuer institution) may be an electronic wallet provider. As used herein, the term “electronic wallet provider system” may refer to one or more computer systems, computer devices, servers, groups of servers, and/or the like operated by or on behalf of an electronic wallet provider. 
     As used herein, the term “portable financial device” may refer to a payment card (e.g., a credit or debit card), a gift card, a smartcard, smart media, a payroll card, a healthcare card, a wrist band, a machine-readable medium containing account information, a keychain device or fob, an RFID transponder, a retailer discount or loyalty card, a cellular phone, an electronic wallet mobile application, a personal digital assistant (PDA), a pager, a security card, a computer, an access card, a wireless terminal, a transponder, and/or the like. In some non-limiting embodiments or aspects, the portable financial device may include volatile or non-volatile memory to store information (e.g., an account identifier, a name of the account holder, and/or the like). 
     As used herein, the term “payment gateway” may refer to an entity and/or a payment processing system operated by or on behalf of such an entity (e.g., a merchant service provider, a payment service provider, a payment facilitator, a payment facilitator that contracts with an acquirer, a payment aggregator, and/or the like), which provides payment services (e.g., transaction service provider payment services, payment processing services, and/or the like) to one or more merchants. The payment services may be associated with the use of portable financial devices managed by a transaction service provider. As used herein, the term “payment gateway system” may refer to one or more computer systems, computer devices, servers, groups of servers, and/or the like operated by or on behalf of a payment gateway and/or to a payment gateway itself. The term “payment gateway mobile application” may refer to one or more electronic devices and/or one or more software applications configured to provide payment services for transactions (e.g., payment transactions, electronic payment transactions, and/or the like). 
     As used herein, the terms “client” and “client device” may refer to one or more client-side devices or systems (e.g., remote from a transaction service provider) used to initiate or facilitate a transaction (e.g., a payment transaction). As an example, a “client device” may refer to one or more POS devices used by a merchant, one or more acquirer host computers used by an acquirer, one or more mobile devices used by a user, and/or the like. In some non-limiting embodiments or aspects, a client device may be an electronic device configured to communicate with one or more networks and initiate or facilitate transactions. For example, a client device may include one or more computers, portable computers, laptop computers, tablet computers, mobile devices, cellular phones, wearable devices (e.g., watches, glasses, lenses, clothing, and/or the like), PDAs, and/or the like. Moreover, a “client” may also refer to an entity (e.g., a merchant, an acquirer, and/or the like) that owns, utilizes, and/or operates a client device for initiating transactions (e.g., for initiating transactions with a transaction service provider). 
     As used herein, the term “server” may refer to one or more computing devices (e.g., processors, storage devices, similar computer components, and/or the like) that communicate with client devices and/or other computing devices over a network (e.g., a public network, the Internet, a private network, and/or the like) and, in some examples, facilitate communication among other servers and/or client devices. It will be appreciated that various other arrangements are possible. As used herein, the term “system” may refer to one or more computing devices or combinations of computing devices (e.g., processors, servers, client devices, software applications, components of such, and/or the like). Reference to “a device,” “a server,” “a processor,” and/or the like, as used herein, may refer to a previously-recited device, server, or processor that is recited as performing a previous step or function, a different server or processor, and/or a combination of servers and/or processors. For example, as used in the specification and the claims, a first server or a first processor that is recited as performing a first step or a first function may refer to the same or different server or the same or different processor recited as performing a second step or a second function. 
     Non-limiting embodiments or aspects of the disclosed subject matter are directed systems, methods, and computer program products for configuring a gateway, including, but not limited to, configuring a payment gateway. For example, non-limiting embodiments or aspects of the disclosed subject matter provide configuring a gateway with a configuration service to retrieve current configuration files in response to determining current version data stored on a remote server has been modified. Such embodiments or aspects provide techniques and systems for dynamic updating/retrieval of the configuration file(s) without the need to build and/or deploy the entire application package to (each node of) the gateway. Additionally or alternatively, such techniques and systems may include monitoring the current version data by (each node of) the gateway so that (each node of) the gateway may automatically determine/be notified whenever there is a modification of the configuration file and retrieve the current version of the configuration file automatically. Additionally or alternatively, such techniques and systems may include (simultaneous and/or parallel) retrieval of the configuration file from the (central) repository by (each node of) the gateway (e.g., rather than individual and/or series uploading of the application package to each node). As such, (each node of) the gateway may identify and retrieve the current version of the configuration file using less computing resources and with less delay (e.g., compared to uploading the entire application package to each node of the gateway individually), and the configuration file need only be uploaded once to the (central) repository, from which (each node of) the gateway may retrieve/download a copy. Accordingly, such techniques and systems may reduce total cost (e.g., in terms of computing resources, price, and/or the like) and reduce time to market. Additionally or alternatively, where there is a production issue that can be resolved by changing the configuration file, such techniques or systems may allow the configuration file to be modified and uploaded to the (central) repository, and the modified/current version of the configuration file may be automatically retrieved by all nodes. Additionally or alternatively, such techniques and systems may reduce transaction loss as (each node of) the gateway need not be taken offline and the time period to deploy the modified/updated configuration file is reduced. Additionally or alternatively, such techniques and systems may reduce operation cost, new application code, and/or packaging need not be built/deployed to deploy the modified/updated configuration file. 
     For the purpose of illustration, in the following description, while the presently disclosed subject matter is described with respect to methods, systems, and computer program products for configuring a gateway, e.g., dynamically configuring a payment gateway, one skilled in the art will recognize that the disclosed subject matter is not limited to the illustrative embodiments or aspects. For example, the methods, systems, and computer program products described herein may be used with a wide variety of settings, such as configuring a gateway and/or computer system in any setting suitable for using such gateway and/or computer system or for evaluating data based on such configurations, e.g., to detect fraud, to manage network traffic, to manage and/or filter electronic communications (e.g., emails, message, posts, and/or the like), to manage creation of and/or changes to accounts (e.g., at a bank, at a merchant, at a website, at a social networking platform, and/or the like), and/or the like. 
     Referring now to  FIG.  1   ,  FIG.  1    is a diagram of a non-limiting embodiment or aspect of an environment  100  in which systems, products, and/or methods, as described herein, may be implemented. As shown in  FIG.  1   , environment  100  includes transaction service provider system  102 , issuer system  104 , customer device  106 , merchant system  108 , acquirer system  110 , and network  112 . 
     Transaction service provider system  102  may include one or more devices capable of receiving information from and/or communicating information to issuer system  104 , customer device  106 , merchant system  108 , and/or acquirer system  110  via network  112 . For example, transaction service provider system  102  may include a computing device, such as a server (e.g., a transaction processing server), a group of servers, and/or other like devices. In some non-limiting embodiments or aspects, transaction service provider system  102  may be associated with a transaction service provider as described herein. In some non-limiting embodiments or aspects, transaction service provider system  102  may be in communication with a data storage device, which may be local or remote to transaction service provider system  102 . In some non-limiting embodiments or aspects, transaction service provider system  102  may be capable of receiving information from, storing information in, communicating information to, or searching information stored in the data storage device. 
     Issuer system  104  may include one or more devices capable of receiving information and/or communicating information to transaction service provider system  102 , customer device  106 , merchant system  108 , and/or acquirer system  110  via network  112 . For example, issuer system  104  may include a computing device, such as a server, a group of servers, and/or other like devices. In some non-limiting embodiments or aspects, issuer system  104  may be associated with an issuer institution as described herein. For example, issuer system  104  may be associated with an issuer institution that issued a credit account, debit account, credit card, debit card, and/or the like to a user associated with customer device  106 . 
     Customer device  106  may include one or more devices capable of receiving information from and/or communicating information to transaction service provider system  102 , issuer system  104 , merchant system  108 , and/or acquirer system  110  via network  112 . Additionally or alternatively, each customer device  106  may include a device capable of receiving information from and/or communicating information to other customer devices  106  via network  112 , another network (e.g., an ad hoc network, a local network, a private network, a virtual private network, and/or the like), and/or any other suitable communication technique. For example, customer device  106  may include a client device and/or the like. In some non-limiting embodiments or aspects, customer device  106  may or may not be capable of receiving information (e.g., from merchant system  108  or from another customer device  106 ) via a short-range wireless communication connection (e.g., an NFC communication connection, an RFID communication connection, a Bluetooth® communication connection, a Zigbee® communication connection, and/or the like), and/or communicating information (e.g., to merchant system  108 ) via a short-range wireless communication connection. 
     Merchant system  108  may include one or more devices capable of receiving information from and/or communicating information to transaction service provider system  102 , issuer system  104 , customer device  106 , and/or acquirer system  110  via network  112 . Merchant system  108  may also include a device capable of receiving information from customer device  106  via network  112 , a communication connection (e.g., an NFC communication connection, an RFID communication connection, a Bluetooth® communication connection, a Zigbee® communication connection, and/or the like) with customer device  106 , and/or the like, and/or communicating information to customer device  106  via the network, the communication connection, and/or the like. In some non-limiting embodiments or aspects, merchant system  108  may include a computing device, such as a server, a group of servers, a client device, a group of client devices, and/or other like devices. In some non-limiting embodiments or aspects, merchant system  108  may be associated with a merchant as described herein. In some non-limiting embodiments or aspects, merchant system  108  may include one or more client devices. For example, merchant system  108  may include a client device that allows a merchant to communicate information to transaction service provider system  102 . In some non-limiting embodiments or aspects, merchant system  108  may include one or more devices, such as computers, computer systems, and/or peripheral devices capable of being used by a merchant to conduct a transaction with a user. For example, merchant system  108  may include a POS device and/or a POS system. 
     Acquirer system  110  may include one or more devices capable of receiving information from and/or communicating information to transaction service provider system  102 , issuer system  104 , customer device  106 , and/or merchant system  108  via network  112 . For example, acquirer system  110  may include a computing device, a server, a group of servers, and/or the like. In some non-limiting embodiments or aspects, acquirer system  110  may be associated with an acquirer as described herein. 
     Network  112  may include one or more wired and/or wireless networks. For example, network  112  may include a cellular network (e.g., a long-term evolution (LTE) network, a third generation (3G) network, a fourth generation (4G) network, a code division multiple access (CDMA) network, and/or the like), a public land mobile network (PLMN), a local area network (LAN), a wide area network (WAN), a metropolitan area network (MAN), a telephone network (e.g., the public switched telephone network (PSTN)), a private network (e.g., a private network associated with a transaction service provider), an ad hoc network, an intranet, the Internet, a fiber optic-based network, a cloud computing network, and/or the like, and/or a combination of these or other types of networks. 
     The number and arrangement of systems, devices, and/or networks shown in  FIG.  1    are provided as an example. There may be additional systems, devices, and/or networks; fewer systems, devices, and/or networks; different systems, devices, and/or networks; and/or differently arranged systems, devices, and/or networks than those shown in  FIG.  1   . Furthermore, two or more systems or devices shown in  FIG.  1    may be implemented within a single system or device, or a single system or device shown in  FIG.  1    may be implemented as multiple, distributed systems or devices. Additionally or alternatively, a set of systems (e.g., one or more systems) or a set of devices (e.g., one or more devices) of environment  100  may perform one or more functions described as being performed by another set of systems or another set of devices of environment  100 . 
     Referring now to  FIG.  2   ,  FIG.  2    is a diagram of example components of a device  200 . Device  200  may correspond to one or more devices of transaction service provider system  102 , one or more devices of issuer system  104 , customer device  106 , one or more devices of merchant system  108 , and/or one or more devices of acquirer system  110 . In some non-limiting embodiments or aspects, transaction service provider system  102 , issuer system  104 , customer device  106 , merchant system  108 , and/or acquirer system  110  may include at least one device  200  and/or at least one component of device  200 . As shown in  FIG.  2   , device  200  may include bus  202 , processor  204 , memory  206 , storage component  208 , input component  210 , output component  212 , and communication interface  214 . 
     Bus  202  may include a component that permits communication among the components of device  200 . In some non-limiting embodiments or aspects, processor  204  may be implemented in hardware, firmware, or a combination of hardware and software. For example, processor  204  may include a processor (e.g., a central processing unit (CPU), a graphics processing unit (GPU), an accelerated processing unit (APU), and/or the like), a microprocessor, a digital signal processor (DSP), and/or any processing component (e.g., a field-programmable gate array (FPGA), an application-specific integrated circuit (ASIC), and/or the like), and/or the like, which can be programmed to perform a function. Memory  206  may include random access memory (RAM), read only memory (ROM), and/or another type of dynamic or static storage device (e.g., flash memory, magnetic memory, optical memory, and/or the like) that stores information and/or instructions for use by processor  204 . 
     Storage component  208  may store information and/or software related to the operation and use of device  200 . For example, storage component  208  may include a hard disk (e.g., a magnetic disk, an optical disk, a magneto-optic disk, a solid state disk, and/or the like), a compact disc (CD), a digital versatile disc (DVD), a floppy disk, a cartridge, a magnetic tape, and/or another type of computer-readable medium, along with a corresponding drive. 
     Input component  210  may include a component that permits device  200  to receive information, such as via user input (e.g., a touch screen display, a keyboard, a keypad, a mouse, a button, a switch, a microphone, a camera, and/or the like). Additionally or alternatively, input component  210  may include a sensor for sensing information (e.g., a global positioning system (GPS) component, an accelerometer, a gyroscope, an actuator, and/or the like). Output component  212  may include a component that provides output information from device  200  (e.g., a display, a speaker, one or more light-emitting diodes (LEDs), and/or the like). 
     Communication interface  214  may include a transceiver-like component (e.g., a transceiver, a receiver and transmitter that are separate, and/or the like) that enables device  200  to communicate with other devices, such as via a wired connection, a wireless connection, or a combination of wired and wireless connections. Communication interface  214  may permit device  200  to receive information from another device and/or provide information to another device. For example, communication interface  214  may include an Ethernet interface, an optical interface, a coaxial interface, an infrared interface, a radio frequency (RF) interface, a universal serial bus (USB) interface, a Wi-Fi®interface, a Bluetooth® interface, a Zigbee® interface, a cellular network interface, and/or the like. 
     Device  200  may perform one or more processes described herein. Device  200  may perform these processes based on processor  204  executing software instructions stored by a computer-readable medium, such as memory  206  and/or storage component  208 . A computer-readable medium (e.g., a non-transitory computer-readable medium) is defined herein as a non-transitory memory device. A non-transitory memory device includes memory space located inside of a single physical storage device or memory space spread across multiple physical storage devices. 
     Software instructions may be read into memory  206  and/or storage component  208  from another computer-readable medium or from another device via communication interface  214 . When executed, software instructions stored in memory  206  and/or storage component  208  may cause processor  204  to perform one or more processes described herein. Additionally or alternatively, hardwired circuitry may be used in place of or in combination with software instructions to perform one or more processes described herein. Thus, embodiments or aspects described herein are not limited to any specific combination of hardware circuitry and software. 
     The number and arrangement of components shown in  FIG.  2    are provided as an example. In some non-limiting embodiments or aspects, device  200  may include additional components, fewer components, different components, or differently arranged components than those shown in  FIG.  2   . Additionally or alternatively, a set of components (e.g., one or more components) of device  200  may perform one or more functions described as being performed by another set of components of device  200 . 
     Referring now to  FIG.  3   ,  FIG.  3    is a flowchart of a non-limiting embodiment or aspect of a process  300  for configuring a gateway. In some non-limiting embodiments or aspects, one or more of the steps of process  300  may be performed (e.g., completely, partially, and/or the like) by transaction service provider system  102  (e.g., one or more devices of transaction service provider system  102 ). In some non-limiting embodiments or aspects, one or more of the steps of process  300  may be performed (e.g., completely, partially, and/or the like) by another system, another device, another group of systems, or another group of devices, separate from or including transaction service provider system  102 , such as issuer system  104  (e.g., one or more devices of issuer system  104 ), customer device  106 , merchant system  108  (e.g., one or more devices of merchant system  108 ), and/or acquirer system  110  (e.g., one or more devices of acquirer system  110 ). In some non-limiting embodiments or aspects, with reference to  FIG.  3   , a gateway (and/or node thereof) may be the same as or similar to one or more devices of transaction service provider system  102 . Additionally or alternatively, at least one first server may be the same as or similar to one or more devices of transaction service provider system  102 . Additionally or alternatively, a repository and/or at least one second server may be the same as or similar to one or more devices of transaction service provider system  102 . 
     As shown in  FIG.  3   , at step  310 , process  300  may include monitoring current version data. For example, a gateway node (e.g., one or more devices of transaction service provider system  102 ) may monitor the current version data stored on at least one first server (e.g., one or more devices of transaction service provider system  102 ), which may be separate from and/or remote from the gateway node. In some non-limiting embodiments or aspects, the gateway node may be a node of an online gateway service (OGS). In some non-limiting embodiments or aspects, the current version data may be associated with a current version of a configuration file for the gateway (and/or for nodes thereof). In some non-limiting embodiments or aspects, the current version of the configuration file may be stored on at least one repository. Additionally or alternatively, the at least one repository may include at least one second server (e.g., one or more devices of transaction service provider system  102 ). In some non-limiting embodiments or aspects, the repository (e.g., second server(s)) may be separate from and/or remote from the gateway and the first server(s). In some non-limiting embodiments or aspects, the repository may include a content platform (e.g., Hitachi Content Platform (HCP) and/or the like). 
     In some non-limiting embodiments or aspects, monitoring the current version data may include using a first agent on the gateway node to monitor a view of the current version data from a second agent on the at least one first server. For example, the first agent may include a client agent of a cluster. Additionally or alternatively, the second agent may include a server agent of the cluster. In some non-limiting embodiments or aspects, the first agent may be a Consul client agent (e.g., Consul agent in client mode) of the gateway node, and the second agent may be a Consul server agent (e.g., Consul agent in server mode) of the first server. In some non-limiting embodiments or aspects, the client agent may perform a “watch” command to monitor the current version data. 
     In some non-limiting embodiments or aspects, the current version data may include data identifying the current version of the configuration file. In some non-limiting embodiments, the current version data may include a value of at least one field (e.g., a version number). In some non-limiting embodiments, the current version data may include at least one key associated with at least one identifier of the configuration file and at least one value associated with the current version (e.g., a current version number). For example, the key(s) may include any suitable key(s) uniquely associated with the identifier. Additionally or alternatively, the identifier(s) may include any suitable identifier(s) to uniquely identify the configuration file. Additionally or alternatively, the value(s) may include any suitable value or set of values to uniquely identify the version (e.g., a single number, a set of numbers, a semantic versioning number, and/or the like). For the purpose of illustration, a semantic versioning number may include three numbers separated by periods (e.g.,  3 . 1 . 2 ) or four numbers separated by periods (e.g., 3.1.2.1), and the numbers may represent major version, minor version, patch version, and/or build version, which may be in that order. In some non-limiting embodiments, the current version data may include an identifier (e.g., a file name, a field name, an address and/or location on the repository, and/or the like) such as “GatewayCurrentVersion” (or, e.g., “CurrentConfigVersion,” “CieloCurrentVersion” for a Cielo gateway, and/or the like) and a version number (e.g., 3.1.2 and/or the like). 
     In some non-limiting embodiments or aspects, each version of the configuration file (e.g., the current version thereof) may include at least one of validation rules (e.g., “GatewayValidation,” “GatewayRPG,” “CieloRPG,” and/or the like), transformation rules (e.g., “GatewayTransformation,” “CieloTransformation,” and/or the like), error code and/or response code mapping (e.g., “GatewayCodeMap,” “GatewayErrorCode,” “CieloErrorCode,” and/or the like), and/or any combination thereof. In some non-limiting embodiments or aspects, each of these listed items may include one or more files (e.g., XML files and/or the like). Additionally or alternatively, each version of the configuration file (e.g., the current version thereof) may include at least one application programming interface (API). 
     As shown in  FIG.  3   , at step  320 , process  300  may include modifying the current version data. For example, the current version data stored on the first server(s) (e.g., one or more devices of transaction service provider system  102 ) may be modified. In some non-limiting embodiments or aspects, the current version data stored on the first server(s) may be modified after and/or in response to uploading of the current version of the configuration file to at least one repository (e.g., one or more devices of transaction service provider system  102 ). In some non-limiting embodiments or aspects, the at least one repository may include at least one second server (e.g., one or more devices of transaction service provider system  102 ), which may be separate from and/or remote from the gateway and the first server(s). 
     In some non-limiting embodiments or aspects, modifying the current version data may include modifying (e.g., changing, replacing, and/or the like) at least a portion of the current version data. For example, the value(s) (e.g., version number(s)) of the current version data may be modified to reflect the availability of a new (current) version of the configuration file. For the purpose of illustration, a value associated with a previous version (e.g., 3.1.2) may be replaced with a value of the current version (e.g., 3.1.4). Additionally or alternatively, in some non-limiting embodiments or aspects, the identifier (e.g., a file name, a field name, an address and/or location on the repository, and/or the like) may be modified to reflect the availability of a new (current version of the) configuration file. 
     In some non-limiting embodiments or aspects, the current version of the configuration file may be uploaded to the repository before modifying the current version data. For example, the current version data may be modified in response to the uploading of the current version of the configuration file to the repository. For example, when a new (current version of the) configuration file is uploaded (e.g., from an operations group, a developer, a product and/or application owner, another remote device and/or server, software such as Presto, and/or the like), the current version data (e.g., “GatewayCurrentVersion”) may be modified (e.g., automatically based on the current version number or identifier, manually by an operations group or a product and/or application owner, and/or the like) at the first server (e.g., Consul server agent). Additionally or alternatively, in response to the modification of the current version data, the gateway node (e.g., Consul client agent performing a “watch” of the current version data) may determine and/or be notified of the change, as described herein. 
     As shown in  FIG.  3   , at step  330 , process  300  may include invoking a configuration service. For example, the gateway node (e.g., one or more devices of transaction service provider system  102 ) may invoke the configuration service. In some non-limiting embodiments or aspects, the gateway node may invoke the configuration service after and/or in response to determining that the current version data stored on the first server(s) (e.g., one or more devices of transaction service provider system  102 ) has been modified. In some non-limiting embodiments or aspects, the configuration service may retrieve the current version of the configuration file from the repository (and/or second server(s)) based on the current version data. 
     In some non-limiting embodiments or aspects, the gateway node may determine the current version data stored on the first server(s) has been modified based on using an agent (e.g., client agent such as Consul client agent) to detect that the view of the current version data has been modified. Additionally or alternatively, the gateway node may determine the current version data stored on the first server(s) has been modified based on receiving a notification (e.g., from the first server) that the current version data has been modified. 
     In some non-limiting embodiments, the configuration service may provide services around retrieving configuration files from the repository (e.g., HCP). For example, the gateway node (e.g., node of OGS) may read the current version data (e.g., “GatewayCurrentVersion”) from the first server and/or receive a notification from the first server that the current version data has been modified. Additionally or alternatively, the gateway node may invoke the configuration service to retrieve (e.g., download) the current version of the configuration file from the repository (e.g., HCP) based on the current version data. 
     As shown in  FIG.  3   , at step  340 , process  300  may include storing a copy of the current version of the configuration file. For example, the gateway node (e.g., one or more devices of transaction service provider system  102 ) may store a copy of the current version of the configuration file retrieved by the configuration service. For example, the gateway node may store the configuration file in a memory (e.g., cache memory). 
     In some non-limiting embodiments or aspects, the gateway node may clear the previous version of the configuration file, which may be before, simultaneously with, or after the gateway node invokes the configuration service to retrieve the current version of the configuration file and/or before, simultaneously with, or after the gateway node stores (e.g., caches) the current version of the configuration file. For example, the gateway node may delete a copy of a previous version of the configuration file from its memory (e.g., cache memory). 
     As shown in  FIG.  3   , at step  350 , process  300  may include applying the configuration file. For example, the gateway node (e.g., one or more devices of transaction service provider system  102 ) may use the configuration file with one or more applications (e.g., rapid processing gateway (RPG) applications) deployed thereon. 
     In some non-limiting embodiments or aspects, the gateway may include a payment gateway (e.g., OGS), and the gateway node may include a payment gateway application (e.g., RPG). For example, the gateway node may receive transaction data associated with a payment transaction. Additionally or alternatively, the gateway node may take action on the payment transaction (e.g., validate the transaction, reject the transaction, and/or the like) based (at least partially) on the copy of the current version of the configuration file stored on the gateway node. 
     In some non-limiting embodiments or aspects, the current version of the configuration file may include at least one of validation rules, transformation rules, error code mapping, or any combination thereof. Additionally or alternatively, applying the configuration file may include the gateway node applying the validation rules, transformation rules, error code mapping, or any combination thereof, respectively, to a transaction received by the gateway node. 
     Referring now to  FIG.  4   ,  FIG.  4    is a diagram of an exemplary implementation  400  of a non-limiting embodiment or aspect relating to process  300  shown in  FIG.  3   . As shown in  FIG.  4   , implementation  400  may include user device  402   a , first server  402   b , gateway runtime stack  402   c , monitor  402   d , gateway node  402   e , rapid processing gateway  402   f , configuration service  402   g , repository  402   h , gateway module  402   i , previous version of configuration files  402   j  (including previous transformation rule file  402   k , previous validation rule file  402   l , and/or previous code mapping file  402   m ), and/or current version of configuration files  402   n  (including current transformation rule file  402   o , current validation rule file  402   p , and/or current code mapping file  402   q ). In some non-limiting embodiments or aspects, each of user device  402   a , first server  402   b , gateway runtime stack  402   c , monitor  402   d , gateway node  402   e , rapid processing gateway  402   f , configuration service  402   g , repository  402   h , gateway module  402   i , previous version of configuration files  402   j  (including previous transformation rule file  402   k , previous validation rule file  402   l , and/or previous code mapping file  402   m ), and/or current version of configuration files  402   n  (including current transformation rule file  402   o , current validation rule file  402   p , and/or current code mapping file  402   q ) may be implemented (e.g., completely, partially, and/or the like) by transaction service provider system  102  (e.g., one or more devices of transaction service provider system  102 ). Additionally or alternatively, one or more of user device  402   a , first server  402   b , gateway runtime stack  402   c , monitor  402   d , gateway node  402   e , rapid processing gateway  402   f , configuration service  402   g , repository  402   h , gateway module  402   i , previous version of configuration files  402   j  (including previous transformation rule file  402   k , previous validation rule file  402   l , and/or previous code mapping file  402   m ), and/or current version of configuration files  402   n  (including current transformation rule file  402   o , current validation rule file  402   p , and/or current code mapping file  402   q ) may be implemented (e.g., completely, partially, and/or the like) by another system, another device, another group of systems, or another group of devices, separate from or including transaction service provider system  102 , such as issuer system  104  (e.g., one or more devices of issuer system  104 ), customer device  106 , merchant system  108  (e.g., one or more devices of merchant system  108 ), and/or acquirer system  110  (e.g., one or more devices of acquirer system  110 ). 
     In some non-limiting embodiments or aspects, user device  402   a  may include one or more devices (e.g., one or more devices of transaction service provider system  102 ) of a user (e.g., an operations group, a developer, a product and/or application owner, and/or the like). In some non-limiting embodiments or aspects, user device  402   a  may be used to upload the current version(s) of the configuration file(s) to the repository  402   h , as described herein. Additionally or alternatively, user device  402   a  may be used to modify (e.g., automatically based on uploading of the configuration files to the repository or manually) the current version data on the first server  402   b , as described herein. 
     In some non-limiting embodiments or aspects, first server  402   b  may include one or more devices and/or servers (e.g., one or more devices of transaction service provider system  102 ). In some non-limiting embodiments or aspects, first server  402   b  may store the current version data, as described herein. Additionally or alternatively, first server  402   b  may notify gateway node  402   e  (and/or the monitor  402   d ) thereon, as described herein. In some non-limiting embodiments or aspects, first server  402   b  may include a server agent (e.g., Consul server agent), as described herein. 
     In some non-limiting embodiments or aspects, gateway runtime stack  402   c  may include one or more gateway nodes  402   e . For example, each gateway node  402   e  may include one or more devices and/or servers (e.g., one or more devices of transaction service provider system  102 ), as described herein. In some non-limiting embodiments or aspects, gateway runtime stack  402   c  may include an OGS runtime stack. Additionally or alternatively, gateway runtime stack  402   c  may include a payment gateway runtime stack. In some non-limiting embodiments, gateway runtime stack  402   c  may include additional functionality, services, devices, and/or the like, in addition to gateway node(s)  402   e . For example, gateway runtime stack  402   c  may include monitor/agent  402   d  (e.g., a client agent such as a Consul client agent) to monitor the current version data at first server  402   b , as described herein. Additionally or alternatively, each gateway node  402   e  may have its own monitor/agent  402   d  (e.g., a client agent such as a Consul client agent), as described herein. 
     In some non-limiting embodiments or aspects, gateway node  402   e  may include one or more devices and/or servers (e.g., one or more devices of transaction service provider system  102 ), as described herein. In some non-limiting embodiments or aspects, gateway node  402   e  may include monitor/agent  402   d  (e.g., a client agent such as a Consul client agent), as described herein. Additionally or alternatively, gateway node  402   e  may include gateway application(s)  402   f  (e.g., RPG application) and/or a configuration service  402   g , as described herein. In some non-limiting embodiments or aspects, in response to a determination that the current version data on first server  402   b  has been modified (e.g., based on monitor/agent  402   d  detecting the current version data has been and/or receiving a notification that the current data has been modified), gateway node  402   e  may invoke the configuration server  402   g  to retrieve the current version(s) of the configuration file(s) from repository  402   h , as described herein. 
     In some non-limiting embodiments or aspects, repository  402   h  may include one or more devices and/or servers (e.g., one or more devices of transaction service provider system  102 ), as described herein. Additionally or alternatively, repository  402   h  may include one or more gateway module(s)  402   i  associated with versions of the configuration file(s) uploaded to repository  402   h . In some non-limiting embodiments or aspects, gateway module(s)  402   i  may include modules for each of at least one previous version of configuration file(s)  402   j  and/or current version of configuration file(s)  402   n . For example, previous version of configuration file(s)  402   j  may each include one or more files (e.g., XML files and or the like). For the purpose of illustration, such files may include previous transformation rule file  402   k  (e.g., “GatewayRPG.xml”), previous validation rule file  402   l  (e.g., “GatewayRPG.xml”), previous error and/or response code mapping file  402   m  (“GatewayErrorCode.xml”), and/or any combination thereof. Additionally or alternatively, current version of configuration file(s)  402   n  may include one or more files (e.g., XML files and or the like). For the purpose of illustration, such files may include current transformation rule file  402   o  (e.g., “GatewayRPG.xml”), current validation rule file  402   p  (e.g., “GatewayRPG.xml”), current error and/or response code mapping file  402   q  (“GatewayErrorCode.xml”), and/or any combination thereof. 
     In some non-limiting embodiments or aspects, repository  402   h  may be configured to store current version of configuration file(s)  402   n , as described herein. In some non-limiting embodiments or aspects, first server(s)  402   b  may be configured to store current version data associated with current version of configuration file(s)  402   n , as described herein. Additionally or alternatively, first server(s)  402   b  may be remote and/or separate from repository  402   h , as described herein. In some non-limiting embodiments or aspects, each gateway node  402   e  (e.g., of gateway runtime stack  402   c ) may be remote from first server(s)  402   b  and repository  402   h , as described herein. Additionally or alternatively, each gateway node  402   e  may be configured to monitor the current version data stored on first server(s)  402   b  (e.g., using monitor/agent  402   d ), as described herein. Additionally or alternatively, in response to determining that the current version data stored on first server(s)  402   b  has been modified (e.g., using monitor/agent  402   d ), each gateway node  402   e  may be configured to invoke configuration service  402   g , as described herein. For example, configuration service  402   g  may retrieve (e.g., each gateway node  402   e  may be configured to use configuration server  402   g  to retrieve) current version of configuration file(s)  402   n  from repository  402   h  based on the current version data, as described herein. Additionally or alternatively, each gateway node  402   e  may be configured to store a copy of current version of configuration file(s)  402   n  retrieved by configuration service  402   g , as described herein. 
     In some non-limiting embodiments or aspects, gateway node  402   e  may be configured to delete its copy of previous version of configuration file(s)  402   j , as described herein. For example, gateway node  402   e  may delete the copy of previous version of configuration file(s)  402   j  before, simultaneously with, or after invoking configuration service  402   g  to retrieve current version of configuration file(s)  402   n , as described herein. 
     In some non-limiting embodiments or aspects, each gateway node  402   e  may be configured to apply the current version of configuration file(s)  402   n  after retrieval thereof, as described herein. In some non-limiting embodiments or aspects, the gateway (e.g., gateway runtime stack  402   c  and/or gateway node(s)  402   e  thereof) may include a payment gateway, as described herein. Additionally or alternatively, each gateway node  402   e  may receive transaction data associated with one or more payment transactions, as described herein. Additionally or alternatively, each gateway node  402   e  may apply current version of configuration file(s)  402   n  to the payment transaction(s) (e.g., to validate and/or reject each payment transaction based on the copy of current version of configuration file  402   n ), as described herein. 
     Although the disclosed subject matter has been described in detail for the purpose of illustration based on what is currently considered to be the most practical and preferred embodiments or aspects, it is to be understood that such detail is solely for that purpose and that the disclosed subject matter is not limited to the disclosed embodiments or aspects, but, on the contrary, is intended to cover modifications and equivalent arrangements that are within the spirit and scope of the appended claims. For example, it is to be understood that the presently disclosed subject matter contemplates that, to the extent possible, one or more features of any embodiment can be combined with one or more features of any other embodiment.