Open Banking in Hungary

Introduction

Open Banking in Hungary an internet banking method which is based on the use of open banking protocols and provides advanced capabilities for secure processing of customer information. This payment method belongs to the group of Open Banking methods and allows processing payments in forintss via the banks of Hungary.

The ecommpay payment platform supports processing purchases made with the Open Banking in Hungary payment method.

This article provides information about working with the Open Banking in Hungary method: general insights are presented in the Overview section, while information about the actions required to process payments and perform other actions is presented in the sections that follow.

General information

Interaction diagram

Payment processing by using the Open Banking in Hungary method involves the merchant's web service, one of the interfaces and the ecommpay payment platform, as well as the technical facilities of the bank and provider services.

Payments using the Open Banking in Hungary method can be represented as follows.

Operations support

Various platform interfaces can be used to process payments and perform operations using the Open Banking in Hungary method: purchases can be processed by using Payment Page, Gate and Dashboard (using payment links for opening Payment Page). At the same time, regardless of the interfaces used, amount limitations are applicable depending on the bank used for purchase processing.

Processing scenarios

To perform a purchase by using the Open Banking in Hungary method, you need to redirect the customer to the provider service.

Scenarios for performing operations via the main interfaces of the payment platform correspond to those presented in the diagrams. Similarly, when additional capabilities are used, scenarios for performing operations can be adjusted accordingly. In addition, for payments using Open Banking in Hungary method, different bank selection options are available; they are described in the Purchase by using Payment Page section of this article.Similarly, when additional capabilities are used (for example when using payment links and using separate additional capabilities), scenarios for performing operations can be adjusted accordingly

At the same time, the specifics of working with the Open Banking in Hungary method include the necessity of selecting a bank for each payment. When Payment Page is used for payment processing, the customer usually selects a bank while already in the payment form. When Payment Page is opened with the method and bank preselected as well as when payments are initiated through Gate, the bank must be selected on the side of the web service and the identifier of this bank must be specified in requests. Possible options for bank selection when working with Payment Page are described in Purchase by using Payment Page, ways of using bank identifiers—in the next subsection, Supported banks.

Supported banks

Payments through the Open Banking in Hungary method are carried out through banks that support the work with this method. The following table lists the names and identifiers of banks supported by the method. Keep in mind that this list is presented for informational purposes.

Since the list of available banks may change over time, it is recommended to send a POST request to the /v2/info/banks/hungary/sale/list endpoint to obtain up-to-date information. This endpoint belongs to the /v2/info/banks/{payment_method}/{operationType}/list group of the Gate API. The request must contain the project and payment identifiers, signature, currency code, and payment amount, as shown in the example. Specify real payment data if possible. However, random values are also allowed.

{
  "general": {
    "project_id": 200,
    "payment_id": "ORDER_155860015",
    "signature": "K6jllym+PtObocZtr345st...=="
  },
  "payment": {
    "amount": 1500,
    "currency": "EUR"
  }
}

[
  {
    "id": 22381, // Bank ID
    "abbr": "RAIFFEISEN-BANK", // The service name of the bank in the platform (or its abbreviation)
    "name": "Raiffeisen Bank", // International bank name
    "nativeName": "Raiffeisen Bank", // Local (national or regional) bank name
    "currencies": [ // Array with information about the currencies supported by the bank
      {
        "id": 978, // Currency ID in the payment platform
        "alpha_3_4217": "EUR", // ISO-4217 alphabetic currency code
        "number_3_4217": "978", // ISO-4217 numeric currency code
        "exponent": 2 // The number of decimal units of the currency
      }
    ]
  },
  {
    "id": 22371,
    "abbr": "UNICREDIT-HUNGARY",
    "name": "UniCredit Bank Hungary",
    "nativeName": "UniCredit Bank Hungary",
    "currencies": [
      {
        "id": 978,
        "alpha_3_4217": "EUR",
        "number_3_4217": "978",
        "exponent": 2
      }
    ]
  },
  {
    "id": 22401,
    "abbr": "KH-BANK",
    "name": "K&H Bank",
    "nativeName": "K&H Bank",
    "currencies": [
      {
        "id": 978,
        "alpha_3_4217": "EUR",
        "number_3_4217": "978",
        "exponent": 2
      }
    ]
  }
]
]

If you have any questions about working with banks supported by the Open Banking in Hungary methods, refer to your ecommpay account manager.

Payment confirmation procedure

The workflow of processing purchases made with Open Banking in Hungary method implies participation of banks, and in certain cases, processing payments on the side of these banks and the provider service may take up considerable time (in some cases up to seven or more days). As a result, there can be situations when the earlier information about the payment's completion or decline contradicts the final result (for example, following a notification about a declined payment, the funds are credited to the recipient's account, or vice versa).

To ensure timely and correct notification of merchants regarding the status of payments in these cases, the ecommpay payment platform uses a payment confirmation procedure. When you integrate the Open Banking in Hungary payment method, discuss with your account manager the use of this procedure as well as switching of statuses of the payments with the confirmed declines to the reversed or decline status (to make monitoring and analysing payments more convenient).

The payment confirmation procedure is performed as follows:

• After the customer completes all required steps, the payment is processed on the provider and bank services side while the customer is redirected to the payment interface (Payment Page or the web service) where they receive the information about payment processing.
• A number of actions are performed on the payment platform side:
  • The payment confirmation operation is formed.
  • The payment is assigned the awaiting confirmation status—until the provider receives information about the crediting of funds.
  • A callback is sent to the web service about changes in payment status.
  • The sale operation status is set to success or decline (depending on the provider or bank specifics) until the information about payment confirmation is received from the provider side.
  • A callback is sent to the web service about changes in the status of the operation.
• On the provider’s side, the final status of funds being credited is determined, after which the information about this status is sent to the payment platform.
• On the payment platform side, the received information is processed, as a result of which the payment confirmation operation and the payment are assigned final statuses and the corresponding callbacks are sent to the web service.

The payment confirmation operation can have one of the following final statuses:

• success—when the information about the crediting of funds to the recipient is received from a service provider side. In this case the payment status is set to success and the final callback containing the payment information is sent to the web service.
• decline—when the information regarding the funds not being credited to the recipient is received from a service provider upon expiration of the specified period (which is 7 days by default and can be changed by contacting ecommpay technical support).

  In such cases depending on the project settings, that were configured during integration, the following scenarios are available:

  • The reversal operation is formed automatically and the payment platform sends the following callbacks successively: an intermediate callback, containing information about the funds not being credited and the final callback, containing the information about the purchase refund and the reversed payment status.
  • The payment status is set to decline and the final callback with information that purchase was declined is sent from the payment platform to the web service.

When using this procedure, you can also monitor payment and operation statuses by using the Gate API (by receiving responses to payment status requests), as well as the Dashboard interface.

Using payment confirmation via Payment Page and Gate is described in the corresponding sections of this article. If you have any additional questions regarding this procedure, contact the ecommpay specialists.

General information

To process a purchase through Payment Page by using the Open Banking in Hungary method, the merchant's web service is required to send a request with all required parameters and signature to the ecommpay URL and receive a callback with the result. It should be taken into account that in the process of making a payment, the customer is redirected to the service of the provider or bank and in some cases, taking into account the specifics of the provider processing the payment, the customer may additionally be required to provide consent and certain information.

The full sequence and special aspects of purchase processing are provided below.

Generally, when a customer confirms their intention to pay on the side of the web service, they are redirected to Payment Page where they select the payment method and, in the case of working with the Open Banking in Hungary method, additionally select one of the available banks. However, in some situations, other options for choosing a payment method and bank may be relevant. For example, upon opening Payment Page, you can immediately redirect the customer to the bank selection page or limit the list of supported banks for a particular payment and display only target bank selection buttons to the customer. And from the web service side, you can control the use of such options.

The specific option of selecting the payment method and bank is determined depending on the parameters specified in the request for opening Payment Page (details). The following options are available:

• 1—when the payment form is opened, it sequentially displays separate pages for selecting a method and a bank. Then the customer selects the method and the bank (this option is used by default).
• 2—when the payment form is opened, the buttons for selecting other methods and banks supported by this method are displayed on one page. Then the customer selects one of these banks.
• 3—when the payment form is opened, the buttons for selecting other methods of the specified group and banks supported by this method are displayed on one page. Then the customer selects one of these banks.
• 4—when the payment form is opened, it displays a page with buttons for selecting all available banks for this method. Then the customer selects one of these banks.
• 5—when the payment form is opened, it displays a page with buttons for selecting only specific banks supported by this method. Then the customer selects one of these banks.
• 6—when the payment form is opened, it displays a page requesting confirmation of redirection to the service of the specific bank. Then the customer confirms the redirection.

When working with such purchases, you can use the following options for choosing a method and bank.

Information about the formats of requests and callbacks used for processing payments by using the Open Banking in Hungary method via Payment Page is presented further in this section; general information about working with the Payment Page API is presented in Interaction concepts.

Request format

There are several things you need to consider when using the Open Banking in Hungary method:

1. The following parameters required for any payment must be specified:
   • project_id—project identifier obtained from ecommpay during integration
   • payment_id—payment identifier unique within the project
   • payment_currency—alphabetic payment currency code in the ISO-4217 alpha-3 format
   • payment_amount—payment amount in the smallest currency unit
   • customer_id—customer identifier unique within the project
2. The following parameters required for any payment must be specified: project_id, payment_id, payment_currency, payment_amount, customer_id.
3. Additionally, it is recommended to specify the first and last names of the customer in the parameters customer_first_name and customer_last_name. If any of these parameters are missing, the payment form may display input fields for entering the missing values (details) (details are available in Submission of additional payment information).

   Additionally, when selecting certain banks the customer can be required to specify the International Bank Account Number (IBAN) on Payment Page, while selecting other banks the IBAN is specified on the provider side. Due to the specifics of the payment methods this number can only be specified by the customer separately and can't be used in requests.

4. It is recommended to specify in the request the merchant_return_url parameter with the URL for redirecting the customer to the web service, so that the customer can return to the web service by clicking the corresponding button on the payment form in case the customer does not grant their consent for payment processing.
5. 1. Selecting the method and the bank on Payment Page (1)—the default option, applied if the force_payment_method parameter and the payment_methods_options object, mentioned in subpoints 2–6 are not used.
   2. Selecting a bank among other methods on Payment Page (2)—for this option, you need to specify a string object in the value of the payment_methods_options parameter, the name of which is the method indicator (online_hungarian_banks), and the value of which is the split_banks parameter set to the value true. While specifying such an object, all nested " characters (U+0022) must be escaped using the preceding \ characters (U+005C).

      "payment_methods_options": "{\"online_hungarian_banks\": {\"split_banks\": true}}"

      As a result of using this option for the specified method, instead of a button for selecting it, buttons for selecting all supported banks are displayed.

   3. Selecting a bank among other methods of the specified group on Payment Page (3)—this option requires the following:
      • Specify a string object in the value of the payment_methods_options parameter, the name of which is the method indicator (online_hungarian_banks), and the value of which is the split_banks parameter set to the value true. While specifying such an object, all nested " characters (U+0022) must be escaped using the preceding \ characters (U+005C).
      • Specify the openbanking group code in the force_payment_group parameter

      "payment_methods_options": "{\"online_hungarian_banks\": {\"split_banks\": true}}",
      "force_payment_group": "openbanking"

      As a result of using this option for the specified method, instead of a button for selecting it, buttons for selecting all supported banks are displayed, as well as buttons for other methods of the Open Banking group.

   4. Selecting a bank among all available ones on Payment Page (4)—for this option specify the selected Open Banking in Hungary method code (online-hungarian-banks) in the force_payment_method parameter.

      "force_payment_method": "online-hungarian-banks"

      As a result of using this option for the specified method, buttons for selecting all banks, supported by this method, are displayed.

   5. Selecting a bank among specific ones on Payment Page (5)—this option requires the following:
      • Specify a string object in the value of the payment_methods_options parameter, the name of which is the method indicator (online_hungarian_banks), and the value of which is the split_banks parameter set to include the value true and the banks_id array containing the target bank identifiers. While specifying such an object, all nested " characters (U+0022) must be escaped using the preceding \ characters (U+005C).
      • Specify the selected Open Banking in Hungary method code (online-hungarian-banks) in the force_payment_method parameter.

      "payment_methods_options": "{\"online_hungarian_banks\": {\"split_banks\": true, \"banks_id\": [22401, 22391]}}",
      "force_payment_method": "online-hungarian-banks"

      As a result of using this option, buttons for selecting specified banks that support working with the specified method are displayed in the payment form.

   6. Confirming redirection to the service of the specific bank on Payment Page (6)—this option requires the following:
      • Specify a string object in the value of the payment_methods_options parameter, the name of which is the method indicator (online_hungarian_banks), and the value of which is the split_banks parameter set to include the value true and the banks_id array containing the target bank identifier. While specifying such an object, all nested " characters (U+0022) must be escaped using the preceding \ characters (U+005C).
      • Specify the selected Open Banking in Hungary method code (online-hungarian-banks) in the force_payment_method parameter.

      "payment_methods_options": "{\"online_hungarian_banks\": {\"split_banks\": true, \"banks_id\": [22391]}}",
      "force_payment_method": "online-hungarian-banks"

      As a result of using this option, when opening a payment form, a confirmation page is displayed in it to redirect to the service of the specified bank.

6. Additionally, any other parameters available for working with Payment Page can be used (details).
7. After all target parameters are specified, generate a signature (details).

Thus, a correct request for opening the payment form using the Open Banking in Hungary method must contain the project identifier, basic payment information (identifier, amount, and currency code), URL for customer redirection, customer identifier and signature, as well as various optional parameters.

{
   "project_id": 120,
   "payment_id": "580",
   "payment_amount": 1000,
   "payment_currency": "EUR",
   "customer_id": "customer1",
   "customer_first_name": "John",
   "customer_last_name": "Doe",
   "merchant_return_url": "http://example.com/return",
   "signature": "kUi2x9dKHAVNU0FYldOcZzUCwX6R\/ekpZhkIQg=="
}

{
   "project_id": 120,
   "payment_id": "580",
   "payment_amount": 1000,
   "payment_currency": "EUR",
   "customer_id": "customer1",
   "customer_first_name": "John",
   "customer_last_name": "Doe",
   "merchant_return_url": "http://example.com/return",
   "signature": "kUi2x9dKHAVNU0FYldOcZzUCwX6R\/ekpZhkIQg=="
}

At the same time, in case of selecting a bank among specific banks (5), the request for opening Payment Page may contain additional data.

{
   "project_id": 120,
   "payment_id": "580",
   "payment_amount": 1000,
   "payment_currency": "EUR",
   "customer_id": "customer1",
   "customer_first_name": "John",
   "customer_last_name": "Doe",
   "merchant_return_url": "http://example.com/return",
   "force_payment_method": "online-hungarian-banks",
   "payment_methods_options": {"online_hungarian_banks": {"split_banks": true, "banks_id": [22381, 22391]}},
   "signature": "kUi2x9dKHAVNU0FYldOcZzUCwX6R\/ekpZhkIQg=="
}

Callback format

The Open Banking in Hungary method uses the standard format for callbacks to deliver purchase results. For more information, see Callbacks (details).

The following is the example of a callback with information about a 10.00 HUF purchase made in the 239 project.

 {
        "project_id": 239,
        "payment": {
            "id": "TEST_PAYMENT_671446",
            "type": "purchase",
            "status": "success",
            "date": "2020-11-03T14:41:38+0000",
            "method": "Hungarian Banks",
            "sum": {
                "amount": 1000,
                "currency": "HUF"
            },
            "description": "TEST_PAYMENT_671446"
        },
        "customer": {
            "id": "1"
        },
        "operation": {
            "id": 77796010023511,
            "type": "sale",
            "status": "success",
            "date": "2020-11-03T14:41:38+0000",
            "created_date": "2020-11-03T14:39:34+0000",
            "request_id": "4727897a23d96203f784...d22c87a7f4f473d93-00077797",
            "sum_initial": {
                "amount": 1000,
                "currency": "HUF"
            },
            "sum_converted": {
                "amount": 1000,
                "currency": "HUF"
            },
            "code": "0",
            "message": "Success",
            "provider": {
                "id": 3901,
                "payment_id": "t:5nFu358iuKC3vz8g...zQLtgSSoyAQubVf",
                "auth_code": ""
            }
        },
        "signature": "8UuSBBDvR9RlVXJR+3A3JeYOOPhf...1VlLygAOq+NPNKLu37IZ0kw=="
    }

The following is the example of a callback with information about a declined purchase.

 {
        "customer": {
            "id": "1"
        },
        "project_id": 10801,
        "payment": {
            "id": "TEST_PAYMENT_624318",
            "type": "purchase",
            "status": "decline",
            "date": "2020-11-03T15:47:39+0000",
            "method": "Hungarian Banks",
            "sum": {
                "amount": 100,
                "currency": "HUF"
            },
            "description": "TEST_PAYMENT_624318"
        },
        "operation": {
            "id": 92939010024021,
            "type": "sale",
            "status": "decline",
            "date": "2020-11-03T15:47:39+0000",
            "created_date": "2020-11-03T15:47:02+0000",
            "request_id": "2973231f346e408fcf62f1e3388a...3971c8ccb13-00092940",
            "sum_initial": {
                "amount": 100,
                "currency": "HUF"
            },
            "sum_converted": {
                "amount": 100,
                "currency": "HUF"
            },
            "code": "20000",
            "message": "General decline",
            "provider": {
                "id": 3901,
                "payment_id": ""
            }
        },
        "signature": "GK7q/MHaYQuUqSQiCzWFi.../6UzJhblNPSr7tj1/PWfWgCJLbnaeg=="
    }

Useful links

The following articles can be useful when implementing purchases via Payment Page:

• Quickstart and Interaction concepts—about the interaction with the payment platform by using Payment Page.
• Signature generation and verification—about the procedure of generating and verifying signatures in requests and callbacks.
• Payment processing—about the types, processing models, and possible statuses of supported payments and operations.
• One-time one-step purchase—about processing of one-time one-step purchases with immediate debiting of funds by using Payment Page.
• Handling operation processing information—about error and response codes that are used in the payment platform to record information about performing of operations.

General information

To process a purchase through Gate by using one of the Open Banking in Hungary method, the merchant's web service is required to do the following:

1. Send a request with all the required parameters and signature to the ecommpay URL.
2. Receive a callback from the payment platform about the need to obtain consent and, if relevant, additional information from the customer.
3. Obtain consent and additional information from the customer (if requested).
4. Provide information about the customer consent and the provided information (if requested) in a request to the payment platform.
5. Receive an intermediate callback from the payment platform and redirect the customer to the provider service.
6. Receive the final callback from the payment platform.

Information about the data formats used to obtain customer consent and perform customer redirection is provided further in this section.

The full sequence and special aspects of purchase processing are provided below.

Information about the formats of requests and callbacks used for processing payments by using the Open Banking in Hungary method via Gate is presented further in this section. General information about working with the Gate API is presented in Interaction concepts.

Request format

There are several things you need to consider when sending purchase requests by using the Open Banking in Hungary method:

1. To initiate each purchase, send a separate POST request to the /v2/payment/banks/hungary/sale endpoint, which belongs to the group /v2/payment/banks/{payment_method}/sale.
2. Each request must include the following objects and parameters:
   • Object general—general purchase information:
     • project_id—project identifier obtained from ecommpay during integration
     • payment_id—payment identifier unique within the project
     • signature—request signature generated after all required parameters are specified (details—in the Signature generation and verification) (details)
   • Object payment—payment information:
     • amount—payment amount in the smallest currency unit
     • currency—alphabetic payment currency code in the ISO-4217 alpha-3 format
   • Object customer—customer information:
     • id—customer identifier unique within the project
     • ip_address—customer IP address relevant for the initiated payment
   • Object account—customer account information:
     • bank_id—bank identifier
   • Object return_url—URLs for redirecting the customer to the web service:
     • return—URL for redirecting the customer to the web service when working with the service of a provider or bank in cases where the customer refuses to make a payment.
3. Additionally, it is recommended to specify the first and last names of the customer in the first_name and last_name parameters of the customer object following objects and parameters. If any of these parameters are missing, the payment platform may send the list of missing parameters in a callback requesting additional information submission.

   In addition, in some cases, due to the specifics of the method, even if the initial request included the International Bank Account Number (IBAN), it is still requested additionally, by specifying the account object including the number parameter in the in a callback requesting additional information submission.

   In addition, in some cases, taking into account the specifics of the bank used, the customer may be required to specify the International Bank Account Number (IBAN) on the web service side, while in other cases this number is specified by the customer on the provider side or bank side. At the same time, due to the specifics of the group’s methods, even if the customer account number is indicated in the initial request, it is not taken into account during the initial processing of this request and can be requested separately, by specifying the account object including the number parameter in a callback requesting additional information submission (along with indicating other relevant parameters if they were not specified).

   Details about providing additional parameters are available in the Submission of additional payment information article.

4. Additionally, any other parameters included in the specification can be used.

Thus, a correct purchase request by using the Open Banking in Hungary method must contain the project identifier, basic payment information (identifier, amount, and currency code), customer identifier and IP address, bank identifier, URL for redirection and signature, as well as various optional parameters.

{
    "general": {
      "project_id": 2990,
      "payment_id": payment_id,
      "signature": "PJkV8ej\/UQVVfBaNIipTv+AWoXW\/9MTO8yJA=="
    },
    "payment": {
      "amount": 1000,
      "currency": "HUF"
      },
    "customer": {
      "id": "customer1",
      "ip_address": "66.249.64.45",
      "first_name": "John",
      "last_name": "Doe"
    },
    "account":{
      "bank_id": 22731
    },
    "return_url":{
      "return": "http://example.com/return"
 }
}

{
    "general": {
      "project_id": 2990,
      "payment_id": payment_id,
      "signature": "PJkV8ej\/UQVVfBaNIipTv+AWoXW\/9MTO8yJA=="
    },
    "payment": {
      "amount": 1000,
      "currency": "HUF"
      },
    "customer": {
      "id": "customer1",
      "ip_address": "66.249.64.45",
      "first_name": "John",
      "last_name": "Doe"
    },
    "account":{
      "bank_id": 22731
    },
    "return_url":{
      "return": "http://example.com/return"
 }
}

Formats of the data for obtaining customer's consent

When using the Open Banking in Hungary payment method it is necessary to obtain additional consent from the customer and, if relevant, additional information about the customer. In such cases an intermediate callback containing the clarification_fields object is sent from the payment platform to the web service each time. The nested objects of that object describe the specified objects and parameters necessary to process the payment. Such a callback may include:

• parameter customer.properties.psu_consent_text.default which includes the text that must be displayed to the customer to obtain the purchase consent
• parameters which specify the additional information about the customer that needs to be provided.

Structurally, the clarification_fields object includes objects with a specified set of nested elements (type, description, properties, required, errors) used to describe each requested object and parameter, while the properties object and required array are specified in accordance with the JSON Schema specification.

The structure of each object included in the clarification_fields object includes:

• type and description parameters—information about the object type and its description
• properties parameter—information about the parameters included in the object
• required array—list of the required parameters
• errors array—information on the reasons for requesting the listed parameters

The properties object and the required array are specified according to the JSON Schema specification, while the errors array contains the property, message and constraint parameters which specify the names, relevant messages and descriptions of reasons.

The text which is required to be displayed to the customer is specified in the clarification_fields.customer.properties.psu_consent_text.default parameter.

In general, information about the need to obtain the customer consent and additional information may look like this.

{
  "clarification_fields": {
    "customer": {
      "type": "object",
      "description": "Object that contains customer details",
      "properties": {
        "psu_consent": {
          "type": "string",
          "description": "Need to request the users consent to make a payment"
        },
        "psu_consent_text": {
          "type": "string",
          "description": "The PSU consent text to be displayed on Payment Page",
          "default": "This consent text with possibly links to some resources here."
        },
        "first_name": {
          "type": "string",
          "maxLength": 255,
          "description": "Customer first name"
        },
        "last_name": {
          "type": "string",
          "maxLength": 255,
          "description": "Customer last name"
        }
      },
      "required": [
        "psu_consent",
        "psu_consent_text",
        "first_name",
        "last_name"
      ],
      "errors": [
        {
          "property": "customer.psu_consent",
          "message": "The property psu_consent is required for the clarification request",
          "constraint": "required"
        },
        {
          "property": "customer.psu_consent_text",
          "message": "The property psu_consent_text is required for the clarification request",
          "constraint": "required"
        },
        {
          "property": "customer.first_name",
          "message": "The property first_name is required",
          "constraint": "required"
        },
        {
          "property": "customer.last_name",
          "message": "The property last_name is required",
          "constraint": "required"
        }
      ]
    },
    "account": {
      "type": "object",
      "description": "Object that contains the details of the customer's bank account for payment performing",
      "properties": {
        "number": {
          "type": "string",
          "maxLength": 100,
          "minLength": 1,
          "description": "Customer's account number"
        },
        "bank_code": {
          "type": "string",
          "maxLength": 100,
          "minLength": 1,
          "description": "Customer's bank code"
        }
      },
      "required": [
        "number",
        "bank_code"
      ],
      "errors": [
        {
          "property": "account.number",
          "message": "The property number is required",
          "constraint": "required"
        },
        {
          "property": "account.bank_code",
          "message": "The property bank_code is required",
          "constraint": "required"
        }
      ]
    }
  }
}

After obtaining the customer consent and the requested information on the web service side, it is necessary to send a POST request to continue the payment. Such a request must be sent to the /v2/payment/clarification endpoint and must contain the following objects and parameters:

• general—object that contains general request identification information:
  • project_id—the project ID which is relevant to the payment
  • payment_id—payment ID which is relevant to the data being sent
  • signature—request signature generated after all of the required parameters are specified. For more information about signature generation, see Signature generation and verification
• additional_data—object that contains information about customer's consent for purchase processing (and additional information, if needed):
  • customer—object that contains customer information:
    • psu_consent—information about obtainment of customer's consent for purchase processing. If the customer granted their consent for purchase processing, the value for this parameter must be 1.

      If the customer has not provided consent, then the request to continue the payment may not be sent. In such cases, after 30 minutes (or another time, if this was configured for the project used) a certain time the payment is declined. When sending requests with a psu_consent parameter value other than 1, the customer's consent is requested again.

    • psu_consent_text—the text of the request for customer's consent for purchase processing displayed to the customer. The text specified as the value of this parameter must be exactly the same as the text received in the callback informing the merchant about the necessity of obtaining customer's consent. If the specified text is different, the customer's consent is requested again.
  • <additional_parameters>—parameters which specify the additional requested information about the customer.

Thus, a correct request must include project and payment IDs, information about customer's consent and text displayed to the customer, additional customer information (if needed) and signature, as shown in the following example:

{
  "general": {
    "project_id": 10571,
    "payment_id": "1234567890",
    "signature": "=== signature ==="
  },
  "additional_data": {
    "customer": {
      "psu_consent": "1",
      "psu_consent_text": "=== The PSU consent text to be displayed on payment page ===",
      "first_name": "Firstname",
      "last_name": "Lastname"
    },
    "account": {
      "number": "AB123456789"
    }
  }
}

{
  "general": {
    "project_id": 10571,
    "payment_id": "1234567890",
    "signature": "=== signature ==="
  },
  "additional_data": {
    "customer": {
      "psu_consent": "1",
      "psu_consent_text": "=== The PSU consent text to be displayed on payment page ===",
      "first_name": "Firstname",
      "last_name": "Lastname"
    },
    "account": {
      "number": "AB123456789"
    }
  }
}

Formats of intermediate callbacks for customer redirection

Each payment made with the Open Banking in Hungary method requires redirection of customers from the merchant's web service to the service of the provider or bank. To redirect a customer it is necessary to receive an intermediate callback from the payment platform and use the information included in the redirect_data object. The format of such callbacks is standard (details), and the following objects and parameters are included in the redirect_data object:

• body—object with data to be sent in the request body (taking into account the specifics of a particular method, this object may contain various information)
• method—parameter specifying the HTTP method for sending the request (GET or POST)
• url—parameter containing a link for redirection

  "redirect_data": {
    "body": {},
    "method": "GET",
    "url": "https://www.example.com/pay"
  }

Final callback format

The Open Banking in Hungary method uses the standard format for callbacks to deliver purchase results. For more information, see Callbacks (details).

The following is the example of a callback with information about a 10.00 HUF purchase made in the 239 project.

 {
        "project_id": 239,
        "payment": {
            "id": "TEST_PAYMENT_671446",
            "type": "purchase",
            "status": "success",
            "date": "2020-11-03T14:41:38+0000",
            "method": "Hungarian Banks",
            "sum": {
                "amount": 1000,
                "currency": "HUF"
            },
            "description": "TEST_PAYMENT_671446"
        },
        "customer": {
            "id": "1"
        },
        "operation": {
            "id": 77796010023511,
            "type": "sale",
            "status": "success",
            "date": "2020-11-03T14:41:38+0000",
            "created_date": "2020-11-03T14:39:34+0000",
            "request_id": "4727897a23d96203f784...d22c87a7f4f473d93-00077797",
            "sum_initial": {
                "amount": 1000,
                "currency": "HUF"
            },
            "sum_converted": {
                "amount": 1000,
                "currency": "HUF"
            },
            "code": "0",
            "message": "Success",
            "provider": {
                "id": 3901,
                "payment_id": "t:5nFu358iuKC3vz8g...zQLtgSSoyAQubVf",
                "auth_code": ""
            }
        },
        "signature": "8UuSBBDvR9RlVXJR+3A3JeYOOPhf...1VlLygAOq+NPNKLu37IZ0kw=="
    }

The following is the example of a callback with information about a declined purchase.

 {
        "customer": {
            "id": "1"
        },
        "project_id": 10801,
        "payment": {
            "id": "TEST_PAYMENT_624318",
            "type": "purchase",
            "status": "decline",
            "date": "2020-11-03T15:47:39+0000",
            "method": "Hungarian Banks",
            "sum": {
                "amount": 100,
                "currency": "HUF"
            },
            "description": "TEST_PAYMENT_624318"
        },
        "operation": {
            "id": 92939010024021,
            "type": "sale",
            "status": "decline",
            "date": "2020-11-03T15:47:39+0000",
            "created_date": "2020-11-03T15:47:02+0000",
            "request_id": "2973231f346e408fcf62f1e3388a...3971c8ccb13-00092940",
            "sum_initial": {
                "amount": 100,
                "currency": "HUF"
            },
            "sum_converted": {
                "amount": 100,
                "currency": "HUF"
            },
            "code": "20000",
            "message": "General decline",
            "provider": {
                "id": 3901,
                "payment_id": ""
            }
        },
        "signature": "GK7q/MHaYQuUqSQiCzWFi.../6UzJhblNPSr7tj1/PWfWgCJLbnaeg=="
    }

Useful links

The following articles can be useful when implementing purchases via Gate:

• Quickstart and Interaction concepts—about the interaction with the payment platform by using Gate.
• Signature generation and verification—about the procedure of generating and verifying signatures in requests and callbacks.
• Payment processing—about the types, processing models, and possible statuses of supported payments and operations.
• One-time one-step purchase—about processing of one-time one-step purchases with immediate debiting of funds by using Payment Page.
• Handling operation processing information—about error and response codes that are used in the payment platform to record information about performing of operations.