Google Pay

Introduction

Google Pay is a payment method which allows to process payments in different currencies by using Google Pay services in different regions. This method supports one-time and credential-on-file purchases, refunds, payment card verification and payouts.

This article provides information about working with the Google Pay 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 Google Pay payment method requires merchant's web service, oone of ecommpay interfaces, and the ecommpay payment platform, as well as the Google Pay and the issuer bank services.

Operations support

Various platform interfaces can be used to process payments and perform operations using the Google Pay method. Purchases can be processed by using Payment Page, Gate and Dashboard (using payment links), refunds and payouts—by using Gate and Dashboard.

Processing scenarios

To perform a purchases by using the Google Pay method, a customer needs to register a payment card in Google Payapp at one of the supported devices first. Then to perform a purchase, it is required to request the tokenized card details from the Google Pay service by using Google Pay API. When processing a purchase by using Payment Page, ecommpay establishes all interactions with the Google Pay service, when processing a purchase by using Gate, interaction with the Google Pay service is on the merchant web service side. To perform a refund, you need to receive a request from a customer and notify the customer about the result of the refund via the web service. To process a payout, you need to notify the customer via the web service.

Figure: Purchase by using Payment Page

Figure: Purchase by using Gate without 3‑D Secure 2 authentication

Figure: Purchase by using Gate with 3‑D Secure 2 authentication

Figure: Refund by using Gate

Figure: Payout by using Gate

Scenarios for performing operations via the main interfaces of the payment platform correspond to those presented in the diagrams. Similarly, when additional features (such as payment links) are used, scenarios for performing operations also correspond to the specifics of those features.

General information

To process a purchase through Payment Page by using the Google Pay 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. 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 Google Pay 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 sending purchase requests by using the Google Pay 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—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. You can choose the way of displaying the Google Pay button on Payment Page. There are several ways:
   • Displaying the Google Pay button on the page for entering card details. The customer must first select the Bank cards method on the page for selection a payment method among other payment methods. This option is set by default.
   • Displaying the Google Pay button on the page for selection a payment method among other payment methods. To set this option, contact ecommpay technical support.
   • Displaying the Google Pay button on the page for entering card details by passing the page for the payment method selection. The customer does not need to select the Bank cards method. To set this option, pass the code card in the force_payment_method parameter.
   • Displaying only the Google Pay button on Payment Page. To set this option, pass the code google_pay_host in the force_payment_method parameter.
4. Additionally, any other parameters available for working with Payment Page can be used (details).
5. After all target parameters are specified, generate a signature (details).

Thus, a correct request for opening the payment form using the Google Pay method must contain the project identifier, basic payment information (identifier, amount, and currency code), customer identifier and signature.

{
   "project_id": 120,
   "payment_id": "580",
   "payment_amount": 1000,
   "payment_currency": "USD",
   "customer_id": "customer1",
   "signature": "kUi2x9dKHAVNU0FYldOcZzUCwX6R\/ekpZhkIQg=="
}

{
   "project_id": 120,
   "payment_id": "580",
   "payment_amount": 1000,
   "payment_currency": "USD",
   "customer_id": "customer1",
   "signature": "kUi2x9dKHAVNU0FYldOcZzUCwX6R\/ekpZhkIQg=="
}

Callback format

In the Google Pay method, the callbacks that deliver purchase results use the standard format described in Callbacks.

Note that unlike other payment methods, in the Google Pay method, callbacks containing information about purchases processed with the inclusion of the 3‑D Secure authentication procedure contain the ECI indicator code in the operation.eci parameter (details); also in this case the service code of the payment method is specified as card in the payment.method parameter. At the same time callbacks containing information about purchases processed without the inclusion of the 3‑D Secure authentication procedure do not contain the ECI indicator code and the service code can be specified as card or etoken-google.

The callbacks containing information about processed purchases include the token of the card in the token parameter of the account object. When the service code of the method is specified as etoken-google the token can be only used for initiating payouts, and when the code is card the token can be used for initiating both purchases and payouts.

The following is the example of a callback with an information about a 1,000.00 USD purchase made in the 688 project by using 431422******0056 payment card without 3‑D Secure authentication.

 {
        "project_id": 688,
        "payment": {
            "id": "TEST_154356886034722221",
            "type": "purchase",
            "status": "success",
            "date": "2019-04-11T11:22:36+0000",
            "method": "etoken-google",
            "sum": {
                "amount": 100000,
                "currency": "USD"
            },
            "description": "TEST_154356886034722221"
        },
        "account": {
            "number": "431422******0056",
            "token": :"a989f5ef7ab159dd5c33260e4201d13dbfcdc75"
        },
        "operation": {
            "id": 2000015,
            "type": "sale",
            "status": "success",
            "date": "2019-04-11T11:22:36+0000",
            "created_date": "2019-04-11T11:22:20+0000",
            "request_id": "2b36e68d4d9fc8839d5d65ee6273dfdebbd",
            "sum_initial": {
                "amount": 100000,
                "currency": "USD"
            },
            "sum_converted": {
                "amount": 100000,
                "currency": "USD"
            },
            "provider": {
                "id": 1381,
                "payment_id": "d1b9-3qfl-9rns-1ql9aokzi2v8",
                "date": "2019-04-11T11:22:34+0000",
                "auth_code": ""
            },
            "code": "0",
            "message": "Success"
        },
        "signature": "Xkf7nUDleg8wcLltroCvNOMq751VtZcgrz6Nax...=="
    }

Useful links

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

• 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 models and statuses—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 by using Payment Page.
• Information of operations performing—about error and response codes that are used in the payment platform to record information about performing of operations.

General information

In order to process purchases by using the Google Pay method via Gate, the merchant must adhere to the Google Pay API Acceptable Use Policy and accept the terms defined in the Google Pay API Terms of Service. At the same time, the web service is required to the following:

1. Perform the necessary setup required by Google and follow the integration checklist
2. Apply for the registration in Google service and receive the Google merchant ID
3. Fill in the Google Pay API integration support request form and take the next steps in accordance with the communications from Google. It may be necessary to provide additional integration information to Google

You should also keep in mind that payments using the Google Pay method can be processed in accordance with two scenarios:

• via the Google Pay app (when installed on the customer's compatible device)
• without using the Google Pay app, like a typical card payment (when the app is not installed on the customer's device or the device is not compatible with it).

In the first case, the purchase is processed without 3‑D Secure authentication, and in the second case, it can be carried out both with and without the authentication. To resolve such situations on the web service side, it is necessary to configure a response to callbacks with information about customer redirection and support the two possible scenarios.

When processing a purchase in the Google Pay method without 3‑D Secure authentication, the merchant web service is required to do the following:

1. Integrate the Google Pay button following the Google Pay brand guidelines and implement the receiving of the token of customer card from Google Pay.
2. Send a request to Google Pay service for payment form or app opening with the list of saved cards that are available to a customer.
3. Send a request to Google Pay service for receiving the token of the card selected by a customer.
4. Send a request with all the required parameters and signature to the ecommpay URL.
5. Receive the final callback with the payment result from the payment platform.

When processing a purchase in the Google Pay method with 3‑D Secure, the merchant web service is required to do the following:

1. Integrate the Google Pay button following the Google Pay brand guidelines and implement the receiving of the token of customer card from Google Pay.
2. Send a request to Google Pay service for payment form or app opening with the list of saved cards that are available to a customer.
3. Send a request to Google Pay service for receiving the token of the card selected by a customer.
4. Send a request with all the required parameters and signature to the ecommpay URL.
5. Get the callback from the platform with data to redirect the customer to the authentication page.
6. Redirect the customer to the authentication page to pass 3‑D Secure.
7. Send the payment completion request with the result of authentication to the payment platform.
8. Receive the final callback with the payment result from the payment platform.

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 Google Pay 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 requests for starting the payment session by using the Google Pay method:

1. To initiate each purchase, send a separate POST request to one of the following endpoints:
   • /v2/payment/googlepay/sale for one-step purchases
   • /v2/payment/googlepay/auth for two-step purchases
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—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 etoken — information about token that represents card details received from the Google Pay service:
     • token—token with card encrypted details
3. Other mandatory parameters may be required. It depends on the tokenization type that is used in a request to the Google Pay service. For information about what type of tokenization you need to perform purchase in a project, contact ecommpay technical support.

   To use PAYMENT_GATEWAY tokenization type, customer email is required to specify in the email parameter of the customer object.

   To use DIRECT tokenization type, the following parameters must be specified in the etoken object:

   • google_merchant_id—merchant ID in the Google Pay service
   • google_tokenization_type—the DIRECT tokenization type
4. Additionally, any other parameters included in the specification can be used.

Thus, a correct purchase request by using the Google Pay method with the PAYMENT_GATEWAY tokenization type must contain the project identifier, basic payment information (identifier, amount, and currency code), customer identifier, IP address and email, as well as signature.

{
  "general": {      
    "project_id": 626,
    "payment_id": "ORDER_ID_gev_S01_0.20111200_1554473913",
    "signature": "xWOlMksKctAKeYADt8W6F98D/ZFgyNqOYw...=="    
  },
  "customer": {
    "id": "123",
    "email": "googlepay@example.com",
    "ip_address": "192.0.2.0"
  },
  "payment": {
    "amount": 10000,    
    "currency": "USD"
  },
  "etoken": {
    "token":  "..." // as received from Google Pay
  }
}

{
  "general": {      
    "project_id": 626,
    "payment_id": "ORDER_ID_gev_S01_0.20111200_1554473913",
    "signature": "xWOlMksKctAKeYADt8W6F98D/ZFgyNqOYw...=="    
  },
  "customer": {
    "id": "123",
    "email": "googlepay@example.com",
    "ip_address": "192.0.2.0"
  },
  "payment": {
    "amount": 10000,    
    "currency": "USD"
  },
  "etoken": {
    "token":  "..." // as received from Google Pay
  }
}

Thus, a correct purchase request by using the Google Pay method with the DIRECT tokenization type must contain the project identifier, basic payment information (identifier, amount, and currency code), customer identifier and IP address, mechant ID and tokenization type, as well as signature.

{
  "general": {
    "project_id": 688,
    "payment_id": "ORDER_89218100_1554981739",
    "signature": "aRZiZZc0w5RVnuCxC7KSm50Pfwsj/8fqy2XlAJ...=="
  },
  "customer": {
    "id": "123",
    "ip_address": "192.0.2.0"
  },
  "payment": {
    "amount": 10000,
    "currency": "USD"
  },
  "etoken": {
    "token": "...", // as it is received from Google Pay
    "google_merchant_id": "12345678901234567890",
    "google_tokenization_type": "DIRECT"
  }
}

{
  "general": {
    "project_id": 688,
    "payment_id": "ORDER_89218100_1554981739",
    "signature": "aRZiZZc0w5RVnuCxC7KSm50Pfwsj/8fqy2XlAJ...=="
  },
  "customer": {
    "id": "123",
    "ip_address": "192.0.2.0"
  },
  "payment": {
    "amount": 10000,
    "currency": "USD"
  },
  "etoken": {
    "token": "...", // as it is received from Google Pay
    "google_merchant_id": "12345678901234567890",
    "google_tokenization_type": "DIRECT"
  }
}

Payment completion request format

There are several things you must consider when using payment completion requests in the Google Pay method:

1. To complete each purchase, send a separate POST request to the /v2/payment/card/3ds_result endpoint.
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)
   • One of the following parameters:
     • pares—the 3‑D Secure authentication result you obtain from the payment platform
     • cres—the 3‑D Secure authentication result you obtain from the Access Control Server

Thus, a correct payment completion request by using the Google Pay method must contain the project and payment identifiers, authentication result, as well as signature.

{
  "general": {
    "project_id": 580,
    "payment_id": "TEST_15427033321774",
    "signature": "96c+hWk1zweuGKwDJXZw7ew6ow3RpGYv4U...=="
  },
  "pares": "eJzVWdfvq8iy/iujOY/1...Dfn76en3N+f/A1fJrSU="
  }

{
  "general": {
    "project_id": 580,
    "payment_id": "TEST_15427033321774",
    "signature": "96c+hWk1zweuGKwDJXZw7ew6ow3RpGYv4U...=="
  },
  "pares": "eJzVWdfvq8iy/iujOY/1...Dfn76en3N+f/A1fJrSU="
  }

Two-step purchase debiting request format

There are several things you need to consider when sending debiting requests by using the Google Pay method:

1. To initiate each debiting, send a separate POST request to one of the following endpoints:
   • /v2/payment/googlepay/capture—when the service code of the method is specified as etoken-google in the callback containing information about authorisation hold
   • /v2/payment/card/capture—when the service code of the method is specified as card in the callback containing information about authorisation hold
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—payment currency code in the ISO-4217 alpha-3 format
3. The amount and currency must match the values in the authorisation request.
4. Additionally, any other parameters included in the specification can be used.

Thus, a correct purchase request by using the Google Pay method must contain the project identifier, basic payment information (identifier, amount, and currency code), as well as signature.

{
  "general": {
    "project_id": 580,
    "payment_id": "TEST_15427033321774",
    "signature": "96c+hWk1zweuGKLXHChlDZrjJXZw7ew6ow3RpGYv4U...=="
  },
  "payment": {
    "amount": 1000,
    "currency": "USD"
  }

{
  "general": {
    "project_id": 580,
    "payment_id": "TEST_15427033321774",
    "signature": "96c+hWk1zweuGKrjJXZw7ew6ow3RpGYv4U...=="
  },
  "payment": {
    "amount": 1000,
    "currency": "USD"
  }

Two-step purchase cancellation request format

There are several things you need to consider when sending purchase cancellation requests by using the Google Pay method:

1. To initiate each cancellation, send a separate POST request to one of the following endpoints:
   • /v2/payment/googlepay/cancel—when the service code of the method is specified as etoken-google in the callback containing information about authorisation hold
   • /v2/payment/card/cancel—when the service code of the method is specified as card in the callback containing information about authorisation hold
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)
3. Additionally, any other parameters included in the specification can be used.

Thus, a correct purchase request by using the Google Pay method must contain the project and payment identifiers, as well as signature.

{
  "general": {
    "project_id": 580,
    "payment_id": "TEST_15427033321774",
    "signature": "9DRrl+Se5mDLXHChlDZrjJXZw7ew6ow3RpGYv4U...=="
  }

{
  "general": {
    "project_id": 580,
    "payment_id": "TEST_15427033321774",
    "signature": "9DRrl+Se5mDLXHChlDZrjJXZw7ew6ow3RpGYv4U...=="
  }

Callback format

In the Google Pay method, the callbacks that deliver purchase results use the standard format described in Callbacks.

Note that unlike other payment methods, in the Google Pay method, callbacks containing information about purchases processed with the inclusion of the 3‑D Secure authentication procedure contain the ECI indicator code in the operation.eci parameter (details); also in this case the service code of the payment method is specified as card in the payment.method parameter. At the same time callbacks containing information about purchases processed without the inclusion of the 3‑D Secure authentication procedure do not contain the ECI indicator code and the service code can be specified as card or etoken-google.

The callbacks containing information about processed purchases include the token of the card in the token parameter of the account object. When the service code of the method is specified as etoken-google the token can be only used for initiating payouts, and when the code is card the token can be used for initiating both purchases and payouts.

The following is the example of a callback with an information about a 1,000.00 USD purchase made in the 688 project by using 431422******0056 payment card without 3‑D Secure authentication.

 {
        "project_id": 688,
        "payment": {
            "id": "EPb940-4dab6",
            "type": "purchase",
            "status": "success",
            "date": "2019-04-11T11:22:36+0000",
            "method": "etoken-google",
            "sum": {
                "amount": 100000,
                "currency": "USD"
            },
            "description": "Successful purchase with 3DS"
        },
        "account": {
            "number": "431422******0056",
            "token": :"a989f5ef7ab159dd5c33260e4201d13dbfcdc75"
        },
        "operation": {
            "id": 2000015,
            "type": "sale",
            "status": "success",
            "date": "2019-04-11T11:22:36+0000",
            "created_date": "2019-04-11T11:22:20+0000",
            "request_id": "2b36e68d4d9fc8839d5d6d701b22c5957ebbd",
            "sum_initial": {
                "amount": 100000,
                "currency": "USD"
            },
            "sum_converted": {
                "amount": 100000,
                "currency": "USD"
            },
            "provider": {
                "id": 1381,
                "payment_id": "gmftho8c-d1b9-3qfl-9rns-1ql9aokzi2v8",
                "date": "2019-04-11T11:22:34+0000",
                "auth_code": "HOSTOK"
            },
            "code": "0",
            "message": "Success"
        },
        "signature": "Xkf7nUDleg8wcLltroCvNOMq751VtZE+JBsJEy2SQ=="
    }

The following is the example of a callback with an information about a 1,000.00 USD purchase made in the 688 project by using 431422******0056 payment card with 3‑D Secure authentication.

 {
        "project_id": 688,
        "payment": {
            "id": "EPb940-4dab6",
            "type": "purchase",
            "status": "success",
            "date": "2019-04-11T11:22:36+0000",
            "method": "etoken-google",
            "sum": {
                "amount": 100000,
                "currency": "USD"
            },
            "description": "Successful purchase with 3DS"
        },
        "account": {
            "number": "431422******0056",
            "token": :"a989f5ef7ab159dd5c33260e4201d13dbfcdc75"
        },
        "operation": {
            "id": 2000015,
            "type": "sale",
            "status": "success",
            "date": "2019-04-11T11:22:36+0000",
            "created_date": "2019-04-11T11:22:20+0000",
            "request_id": "2b36e68d4d9fc8839d5d65e701b22c5957ebbd",
            "sum_initial": {
                "amount": 100000,
                "currency": "USD"
            },
            "sum_converted": {
                "amount": 100000,
                "currency": "USD"
            },
            "provider": {
                "id": 1381,
                "payment_id": "gmftho8c-d1b9-3qfl-9rns-1ql9aokzi2v8",
                "date": "2019-04-11T11:22:34+0000",
                "auth_code": "HOSTOK"
            },
            "code": "0",
            "message": "Success",
            "eci": "02"
        },
        "signature": "Xkf7nUDleg8wcLltroCvNOMq7wdefE+JBsJEy2SQ=="
    }

The following is the example of a callback for a purchase declined due to insufficient funds on card.

{
        "project_id": 688,
        "payment": {
            "id": "TEST_154356886034722222",
            "type": "purchase",
            "status": "decline",
            "date": "2019-04-11T11:24:51+0000",
            "method": "etoken-google",
            "sum": {
                "amount": 100100,
                "currency": "USD"
            },
            "description": "TEST_154356886034722222"
        },
        "account": {
            "number": "431422******0056"
        },
        "operation": {
            "id": 2000000383,
            "type": "sale",
            "status": "decline",
            "date": "2019-04-11T11:24:51+0000",
            "created_date": "2019-04-11T11:24:35+0000",
            "request_id": "0eef294c20a7d72abd0fb20f3753ee674b51fbe",
            "sum_initial": {
                "amount": 100100,
                "currency": "USD"
            },
            "sum_converted": {
                "amount": 100100,
                "currency": "USD"
            },
            "provider": {
                "id": 1381,
                "payment_id": "1rvp-fc2k-cnp9-h41ocauwn6fr",
                "date": "2019-04-11T11:24:50+0000",
                "auth_code": ""
            },
            "code": "20000",
            "message": "General decline",
            "eci": "00"
        },
        "signature": "cQbMiD0pON9eJc5ZugNK0iT5SwHc0feItZRcAB...=="
    }

Useful links

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

• 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 models and statuses—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 by using Payment Page.
• Information of operations performing—about error and response codes that are used in the payment platform to record information about performing of operations.

General information

The Google Pay payment method provides the ability to perform COF purchases—regular on-demand payments. For more information about COF purchases, see On-demand COF purchase.

Registration of a COF purchases is also available by using Payment Page. For registration the web service must send a request containing the required parameters and signature, as well as data for registering a COF purchase in the recurring object, to the ecommpay URL and accept a callback with the result. In the callback about registering a COF purchase, you will get its ID, which you need to use to make or cancel regular payments via Gate. For more information, see the section COF purchases by using Gate.

Information about the formats of requests and callbacks used for processing payments by using the Google Pay 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 creating requests to open a payment form for registering COF purchases by using the Google Pay 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—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. To register a COF purchase, you must specify a recurring object containing the registration attribute and the necessary information. To register regular payments, the request must contain information about the frequency, amount, and beginning and end time of regular payments. The full list of parameters that can be passed in the recurring object is shown in the COF purchase registration section.
4. If you need to have payment form displayed with the Google Pay method selected, set the force_payment_method parameter to:
   • google_pay_host—to open Payment Page with pre-selected payment method Google Pay
   • card—for the ability of payment by using either a payment card or Google Pay. In this case customer can chose the payment method on Payment Page
5. Additionally, any other parameters available for working with Payment Page can be used (details).
6. After all target parameters are specified, generate a signature (details).

Thus, a correct request for opening the payment form using the Google Pay method must contain the project identifier, basic payment information (identifier, amount, and currency code), customer identifier and signature.

{
   "project_id": 120,
   "payment_id": "580",
   "payment_amount": 100000,
   "payment_currency": "USD",
   "customer_id": "customer1",
   "force_payment_method": "google_pay_host",
   "recurring": {"register":true,"type":"R","expiry_year":2025,"expiry_month":"01","period":"D","time":"10:00:00","start_date":"15-11-2020","scheduled_payment_id":"A2323"},
   "signature": "kUi2x9dKHAVNU0FYldOcZzUCwX6R\/ekpZhkIQg=="
}

{
   "project_id": 120,
   "payment_id": "580",
   "payment_amount": 100000,
   "payment_currency": "USD",
   "customer_id": "customer1",
   "force_payment_method": "google_pay_host",
   "recurring": {"register":true,"type":"R","expiry_year":2025,"expiry_month":"01","period":"D","time":"10:00:00","start_date":"15-11-2020","scheduled_payment_id":"A2323"},
   "signature": "kUi2x9dKHAVNU0FYldOcZzUCwX6R\/ekpZhkIQg=="
}

Callback format

The Google Pay method uses the standard format for callbacks to deliver COF purchase registration results. For more information, see Callbacks.

Note that unlike other payment methods, in the Google Pay method, callbacks containing information about purchases processed with the inclusion of the 3‑D Secure authentication procedure contain the ECI indicator code in the operation.eci parameter (details); also in this case the service code of the payment method is specified as card in the payment.method parameter. At the same time callbacks containing information about purchases processed without the inclusion of the 3‑D Secure authentication procedure do not contain the ECI indicator code and the service code can be specified as card or etoken-google.

The callbacks containing information about processed purchases include the token of the card in the token parameter of the account object. When the service code of the method is specified as etoken-google the token can be only used for initiating payouts, and when the code is card the token can be used for initiating both purchases and payouts.

The following is the example of a callback with an information about a COF purchase registration made by a customer in the 208 project.

 {
        "project_id": 208,
        "payment": {
            "id": "payment",
            "type": "purchase",
            "status": "success",
            "date": "2018-11-20T08:44:46+0000",
            "method": "etoken-google",
            "sum": {
                "amount": 300,
                "currency": "USD"
            },
            "description": "payment"
        },
        "account": {
            "number": "431422******0056"
        },
        "recurring": {
            "id": 1000030038,
            "currency": "USD",
            "valid_thru": "-0001-11-30T00:00:00+0000"
        },
        "operation": {
            "id": 1000034,
            "type": "recurring",
            "status": "success",
            "date": "2018-11-20T08:44:46+0000",
            "created_date": "2018-11-20T08:44:41+0000",
            "request_id": "07fd7ade7cf010",
            "sum_initial": {
                "amount": 300,
                "currency": "USD"
            },
            "sum_converted": {
                "amount": 300,
                "currency": "USD"
            },
            "provider": {
                "id": 1381,
                "payment_id": "2548950091",
                "date": "2020-11-20T08:44:45+0000",
                "auth_code": ""
            },
            "code": "0",
            "message": "Success"
        },
        "signature": "x2tsnvLCRyr9a8+I3RipuPWUod5c89cDSQ6cRq...=="
    }

Useful links

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

• 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 models and statuses—about the types, processing models, and possible statuses of supported payments and operations.
• Information of operations performing—about error and response codes that are used in the payment platform to record information about performing of operations.

General information

The Google Pay payment method provides the ability to perform COF purchases—regular on-demand payments. For more information about COF purchases, see On-demand COF purchase.

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

COF purchase registration

To register a COF purchase by using Gate, the merchant is required to send a request for purchase with all the required parameters (including the register parameter of the recurring object, set to the value true) to the ecommpay URL and get the callback with the payment result from the payment platform. To register a regular payment the request should also contain information about the frequency, amount, start and end dates of regular payments. The COF purchase registration callback contains its identifier, which can be used to process or cancel regular payments.

For more information about purchase processing by using Gate, see Purchases by using Gate.

Format of requests for registration of COF purchases

There are several things you need to consider when sending requests for registering COF purchases by using the Google Pay method:

1. To register each COF purchase, send a separate POST request to one of the following endpoints /v2/payment/googlepay/sale or /v2/payment/googlepay/auth.
2. The following objects and parameters must be specified in the request:
   • 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—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 recurring—COF purchase information:
     • register—payment registration as a COF purchase
     • type—type of the COF purchase: R (for Regular payment), C (for OneClick payment), or U (for Autopayment), for more information, refer to Overview
     • scheduled_payment_id—identifier of the next COF purchase
     • start_date—the start date of regular payments, in the DD-MM-YYYY format (must be at least one day later than the date of registration)
     • amount—amount of debiting
     • period—regular payment performing period
     • interval— regular payment performing interval
     • time—regular payment performing time in the hh:mm:ss (UTC0) format
3. Additionally, any other parameters included in the specification can be used.

Thus, a correct COF purchase registration request by using the Google Pay method must contain the project identifier, basic payment information (identifier, amount, and currency code), customer identifier and IP address, the registration parameter and the conditions for regular payments, as well as signature.

 {
  "general": {
    "project_id": 208,
    "payment_id": "TEST_15427007172789",
    "signature": "DH0v2pZnkK9hwytQ6/ZtDSQh+wwx/OqrWdbltzO5GMSkzd0Iq6lM2...==",
  },
  "customer": {
    "id": "123",
    "ip_address": "192.0.2.0"
  },
  "payment": {
    "amount": 1000,
    "currency": "USD"
  },
  "recurring": {
    "register": true,
    "type": "R",
    "amount": 1000,
    "interval": 1,
    "cycle": "week",
    "start_date": "21-11-2018"
  }
}

 {
  "general": {
    "project_id": 208,
    "payment_id": "TEST_15427007172789",
    "signature": "DH0v2pZnkK9hwytQ6/ZtDSQh+wwx/OqrWdbltzO5GMSkzd0Iq6lM2...==",
  },
  "customer": {
    "id": "123",
    "ip_address": "192.0.2.0"
  },
  "payment": {
    "amount": 1000,
    "currency": "USD"
  },
  "recurring": {
    "register": true,
    "type": "R",
    "amount": 1000,
    "interval": 1,
    "cycle": "week",
    "start_date": "21-11-2018"
  }
}

Format of requests for COF purchase processing

After the payment is registered, the funds are debited according to the specified regular payment conditions. You initiate COF purchase by sending a recurring request to the payment platform.

There are several things you must consider when processing COF purchases performing by using the Google Pay method:

• To process each COF purchase, send a separate POST request to one of the following endpoints:
  • /v2/payment/googlepay/recurring—when the service code of the method is specified as etoken-google in the callback containing information about a registered COF purchase
  • /v2/payment/card/recurring—when the service code of the method is specified as card in the callback containing information about a registered COF purchase
• The following objects and parameters must be specified in the request:
  • 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—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 recurring—COF purchase information:
    • id—registered COF purchase identifier
• Additionally, any other parameters included in the specification can be used.

Thus, a correct purchase request by using the Google Pay method must contain the project identifier, basic payment information (identifier, amount, and currency code), customer identifier and IP address, COF purchase identifier, as well as signature.

 {
  "general": {
    "project_id": 208,
    "payment_id": "TEST_15427007172789",
    "signature": "DH0v2pZnkK9hwytQ6wx/OqrWdbltzO5GMSkzd0Iq6lM2...==",
  },
  "customer": {
    "id": "123",
    "ip_address": "192.0.2.0"
  },
  "payment": {
    "amount": 1000,
    "currency": "USD"
  },
  "recurring": {
    "id": 1234567890
  }
}

 {
  "general": {
    "project_id": 208,
    "payment_id": "TEST_15427007172789",
    "signature": "DH0v2pZnkK9hwytQ6wx/OqrWdbltzO5GMSkzd0Iq6lM2...==",
  },
  "customer": {
    "id": "123",
    "ip_address": "192.0.2.0"
  },
  "payment": {
    "amount": 1000,
    "currency": "USD"
  },
  "recurring": {
    "id": 1234567890
  }
}

Format of request for cancellation of COF purchases

Until the expiration date of COF purchases performing, you can cancel it. Also, to change the conditions of COF purchases, you must cancel it and send a request to register a new one.

There are several things you must consider when cancelling COF purchases by using the Google Pay method:

1. To cancel each purchase, send a separate POST request to one of the following endpoints:
   • /v2/payment/googlepay/recurring/cancel—when the service code of the method is specified as etoken-google in the callback containing information about a registered COF purchase
   • /v2/payment/card/recurring/cancel—when the service code of the method is specified as card in the callback containing information about a registered COF purchase
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 recurring—COF purchase information:
     • id—registered COF purchase identifier
3. Additionally, any other parameters included in the specification can be used.

Thus, a correct purchase request by using the Google Pay method must contain the project, payment and COF purchase identifiers, as well as signature.

 {
  "general": {
    "project_id": 208,
    "payment_id": "TEST_15427007172789",
    "signature": "DH0v2pZnkK9hwytQ6/ZtDzO5GMSkzd0Iq6lM2v8...==",
  },
  "recurring": {
    "id": 1234567890
  }
}

 {
  "general": {
    "project_id": 208,
    "payment_id": "TEST_15427007172789",
    "signature": "DH0v2pZnkK9hwytQ6/ZtDzO5GMSkzd0Iq6lM2v8...==",
  },
  "recurring": {
    "id": 1234567890
  }
}

Callback format

The standard format for callbacks is used to deliver the results of actions with COF purchases. For more information, see Callbacks.

Useful links

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

• 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 models and statuses—about the types, processing models, and possible statuses of supported payments and operations.
• Information of operations performing—about error and response codes that are used in the payment platform to record information about performing of operations.

General information

To perform a refund through Gate by using the Google Pay method, send a request with all required parameters and signature to the ecommpay URL and receive a callback with the result. The full sequence and special aspects of refund performing are provided below.

Information about the formats of requests and callbacks used for performing refunds by using the Google Pay 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 refund requests by using the Google Pay method:

1. To initiate each refund, send a separate POST request to one of the following endpoints:
   • /v2/payment/googlepay/refund—when the service code of the method is specified as etoken-google in the callback containing information about a registered COF purchase
   • /v2/payment/card/refund—when the service code of the method is specified as card in the callback containing information about a registered COF purchase
2. The following objects and parameters must be specified in any request:
   • Object general—general refund information:
     • project_id—project identifier obtained from ecommpay during integration
     • payment_id—identifier of the payment that needs to be refundedpayment identifier
     • signature—request signature generated after all required parameters are specified (details—in the Signature generation and verification)
   • Object payment—refund information:
     • description—refund description or comment
     • amount—refund amount in the smallest currency unit (required for a partial refund)
     • currency—refund currency code in the ISO-4217 alpha-3 format (required for a partial refund)
   • Object customer—customer information:
     • ip_address—customer IP address relevant for the initiated refund
3. Additionally, any other parameters included in the specification can be used.

Thus, a correct refund request by using the Google Pay method must contain the project and payment identifiers, description of the refund, the customer IP address, signature, and, if necessary, currency code and refund amount.

{
  "general": {
    "project_id": 210,
    "payment_id": "test_payment",
    "signature": "PJkV8ej\/UG0Di8hTng6JvipTv+AWoXW\/9MTO8yJA=="
  },
  "payment": {
    "description": "test refund",
    "amount": 1000,
    "currency": "USD"
  },
  "customer": {
    "ip_address": "192.0.2.0"
  }
}

{
  "general": {
    "project_id": 210,
    "payment_id": "test_payment",
    "signature": "PJkV8ej\/UG0Di8hTng6JvipTv+AWoXW\/9MTO8yJA=="
  },
  "payment": {
    "description": "test refund",
    "amount": 1000,
    "currency": "USD"
  },
  "customer": {
    "ip_address": "192.0.2.0"
  }
}

Callback format

The Google Pay method uses the standard format for callbacks to deliver refund results. For more information, see Callbacks.

The following is the example of a callback with an information about a 30,00 USD refund for the customer account 541333******0019 in the 208 project.

The service code of the payment method can be specified as etoken-google or card, depending on the purchase for which the refund is processed.

{
        "project_id": 208,
        "payment": {
            "id": "TEST_123456",
            "type": "purchase",
            "status": "refunded",
            "date": "2020-03-30T08:54:23+0000",
            "method": "etoken-google",
            "sum": {
                "amount": 0,
                "currency": "USD"
            },
            "description": "payment for 30.0 USD"
        },
        "account": {
            "number": "541333******0019",
            "type": "mastercard",
            "card_holder": "LEE OONG",
            "expiry_month": "09",
            "expiry_year": "2020"
        },
        "customer": {
            "id": "907680850"
        },
        "operation": {
            "id": 57299000036261,
            "type": "refund",
            "status": "success",
            "date": "2020-03-30T08:54:24+0000",
            "created_date": "2020-03-30T08:54:22+0000",
            "request_id": "122809a-c43c08a4b6ee7d73bfaaf7f",
            "sum_initial": {
                "amount": 3000,
                "currency": "USD"
            },
            "sum_converted": {
                "amount": 3000,
                "currency": "USD"
            },
            "code": "0",
            "message": "Success",
            "provider": {
                "id": 120,
                "payment_id": "353197036",
                "auth_code": "000000",
                "endpoint_id": 120,
                "date": "2020-03-30T08:54:23+0000"
            }
        },
        "signature": "8y41YTzCAy0N/mV+tkJmB6OsGYLUYAyAIp3U/3x7jymU...=="
    }

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

{
        "project_id": 208,
        "payment": {
            "id": "TEST_1234567",
            "type": "purchase",
            "status": "success",
            "date": "2020-03-27T17:41:04+0000",
            "method": "etoken-google",
            "sum": {
                "amount": 2000,
                "currency": "EUR"
            },
            "description": "35121367"
        },
        "account": {
            "number": "541333******0019",
            "type": "mastercard",
            "card_holder": "LEE OONG",
            "expiry_month": "09",
            "expiry_year": "2028"
        },
        "customer": {
            "id": "LEE OONG"
        },
        "operation": {
            "id": 42809000016421,
            "type": "refund",
            "status": "decline",
            "date": "2020-03-27T17:41:04+0000",
            "created_date": "2020-03-27T17:41:03+0000",
            "request_id": "b869d91-ff913d9c5ae5ba1bb6c3457c30e91",
            "sum_initial": {
                "amount": 1400,
                "currency": "EUR"
            },
            "sum_converted": {
                "amount": 1400,
                "currency": "EUR"
            },
            "code": "10000",
            "message": "General decline"
        },
        "signature": "8ql4yC3p2RiYbNXN15+64voxMYBrBQJmcKmL...=="
    }

Useful links

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

• 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 models and statuses—about the types, processing models, and possible statuses of supported payments and operations.
• Purchase refunds—about performing of refunds by using Gate.
• Information of operations performing—about error and response codes that are used in the payment platform to record information about performing of operations.

General information

To process a payout through Gate by using the Google Pay method, send a request with all required parameters and signature to the ecommpay URL and receive a callback with the result. The full sequence and special aspects of payout processing are provided below.

Information about the formats of requests and callbacks used for processing payouts by using the Google Pay 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 payout requests by using the Google Pay method:

1. To initiate each payout send a separate POST request to the /v2/payment/card/payout/token endpoint.
2. Each request must include the following objects and parameters:
   • Object general—general payout 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—payout amount in the smallest currency unit
     • currency—payout currency code in the ISO-4217 alpha-3 format
   • Object customer—customer information:
     • id—customer identifier unique within the project
     • first_name—customer first name
     • middle_name—customer middle name or patronymic
     • last_name—customer last name
     • ip_address—customer IP address relevant for the initiated payout
   • Object card—card information:
     • card_holder—full name of the cardholder
   • token—token of the card received from ecommpay in the parameter included in a callback with information about a processed purchase.
3. In the case of a payout to Visa card issued in Canada, the request must contain the recipient object with the payout recipient's address data:
   • country—recipient's country code in ISO 3166-1 alpha-2
   • city—recipient's city
   • address—recipient's address
   • if the specified country code is CA or US, also pass the state parameter that provides information about the recipient's state, province, or any other region
4. In the case of a payout processed as part of the Visa Money Transfer program to a card issued in Brazil or Qatar, the request must contain the sender's phone number in the phone parameter of the sender object.
5. In the case of a payout that originates from a physical person and that is processed as part of the programs supported for the Mastercard MoneySend service, the request must contain the information about the payout recipient's name in the first_name and last_name parameters of the recipient object and the information about the payout sender in the sender object:
   • number of the sender's payment instrument—pan for the sender's card or wallet_id for the sender's electronic wallet
   • first_name—sender's first name
   • last_name—sender's last name
   • address—sender's address
   • city—sender's city
   • zip—sender's postal code
   • country—sender's country code in ISO 3166-1 alpha-2
   • if the specified country code is CA or US, also pass the state parameter that provides information about the sender's state, province, or any other region
6. Additionally, any other parameters included in the specification can be used.

Thus, a correct payout request by using the Google Pay method must contain the project identifier, basic payment information (identifier, amount, and currency code), customer information, full name of the card holder, as well as token and signature.

{
  "general": {
    "project_id": 210,
    "payment_id": "test_payment",
    "signature": "PJkV8ej\/UG0Di8hTng6JvipTv+AWoXW\/9MTO8yJA=="
  },
  "payment": {
    "amount": 1000,
    "currency": "USD"
  },
  "customer": {
    "id": "customer123",
    "first_name": "John",
    "middle_name": "Jr",
    "last_name": "Jonson",
    "ip_address": "192.0.2.0"
  },
  "card": {
    "card_holder": "John Johnson"
  },
  "token": "a989f5ef7ab159dd5c3016eee7563736f"
}

{
  "general": {
    "project_id": 210,
    "payment_id": "test_payment",
    "signature": "PJkV8ej\/UG0Di8hTng6JvipTv+AWoXW\/9MTO8yJA=="
  },
  "payment": {
    "amount": 1000,
    "currency": "USD"
  },
  "customer": {
    "id": "customer123",
    "first_name": "John",
    "middle_name": "Jr",
    "last_name": "Jonson",
    "ip_address": "192.0.2.0"
  },
  "card": {
    "card_holder": "John Johnson"
  },
  "token": "a989f5ef7ab159dd5c3016eee7563736f"
}

Callback format

The Google Pay method uses the standard format for callbacks to deliver payout results. For more information, see Callbacks.

The following is the example of a callback with information about a 1.00 EUR payout made in the 123 project.

{
        "payment": {
            "method": "card",
            "sum": {
                "amount": 100,
                "currency": "EUR"
            },
            "id": "test_id",
            "type": "payout",
            "status": "success",
            "date": "2023-11-07T07:37:27+0000",
            "description": "Test payout"
        },
        "customer": {
            "id": "Test",
            "ip": "192.0.2.0",
            "first_name": "Test",
            "last_name": "Test"
        },
        "account": {
            "number": "1234******4567",
            "token": "a9608ce50413260e4201d13dbfcdc75",
            "type": "visa",
            "card_holder": "TEST TEST",
            "expiry_month": "01",
            "expiry_year": "2031"
        },
        "project_id": 123,
        "rrn": "331140338636",
        "testdebet": "credit",
        "opeation": {
            "last_processor_message": "Success"
        },
        "operation": {
            "created_date": "2023-11-07T07:37:22+0000",
            "request_id": "d22a4c02f61ed9a82140045-00049491",
            "sum_initial": {
                "amount": 100,
                "currency": "EUR"
            },
            "sum_converted": {
                "amount": 100,
                "currency": "EUR"
            },
            "code": "0",
            "message": "Success",
            "provider": {
                "id": 414,
                "payment_id": "0040000018267721",
                "auth_code": "408112",
                "endpoint_id": 414,
                "date": "2023-11-07T07:37:24+0000"
            },
            "id": 49490010084733,
            "type": "payout",
            "status": "success",
            "date": "2023-11-07T07:37:27+0000"
        },
        "signature": "TL2BLpOE/xAVCmYf8SIUXYqmlF1WHtaHQ=="
    }

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

{
        "payment": {
            "method": "card",
            "sum": {
                "amount": 100,
                "currency": "EUR"
            },
            "id": "test_id",
            "type": "payout",
            "status": "decline",
            "date": "2023-11-07T07:38:27+0000",
            "description": "Test payout"
        },
        "customer": {
            "id": "Test",
            "ip": "192.0.2.0",
            "first_name": "Test",
            "last_name": "Test"
        },
        "account": {
            "number": "1234******4567",
            "token": "a9608ce50413260e4201d13dbfcdc75",
            "type": "visa",
            "card_holder": "TEST TEST",
            "expiry_month": "01",
            "expiry_year": "2031"
        },
        "project_id": 123,
        "rrn": "",
        "testdebet": "credit",
        "opeation": {
            "last_processor_message": "Decline"
        },
        "operation": {
            "created_date": "2023-11-07T07:38:22+0000",
            "request_id": "d22a4c02f61ed9a82140045-00049492",
            "sum_initial": {
                "amount": 100,
                "currency": "EUR"
            },
            "sum_converted": {
                "amount": 100,
                "currency": "EUR"
            },
            "code": "20000",
            "message": "General decline",
            "provider": {
                "id": 414,
                "payment_id": "0040000018267721",
                "auth_code": "",
                "endpoint_id": 414,
                "date": "2023-11-07T07:38:24+0000"
            },
            "id": 49490010084733,
            "type": "payout",
            "status": "decline",
            "date": "2023-11-07T07:38:27+0000"
        },
        "signature": "TL2BLpOE/xAVCmYf8SIUXYqmlF1WHtaHA=="
    }

Useful links

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

• 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 models and statuses—about the types, processing models, and possible statuses of supported payments and operations.
• Payouts—about processing of payouts by using Gate.
• Information of operations performing—about error and response codes that are used in the payment platform to record information about performing of operations.

General information

To perform a payment card verification through the Google Pay method, merchant's web service sends a request with all the required parameters and signature to ecommpay URL, and receives a callback with the result. Payment card verification processing for this method is the same as standard processing sequence which is provided in the section Payment instrument verification.

Format of request for payment card verification

There are several things you need to consider when sending payment card verification requests by using the Google Pay method:

1. To initiate each verification, send a separate POST request to the /v2/payment/googlepay/account_verification endpoint.
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—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
   • etoken—token received from the Google Pay information:
     • token—token received from the Google Pay after customer identification
3. The payment amount must be zero.
4. Additionally, any other parameters included in the specification can be used.

Thus, a correct purchase request by using the Google Pay method must contain the project identifier, basic payment information (identifier, amount, and currency code), customer identifier and IP address, Google Pay token information, as well as signature.

{
  "general": {
    "project_id": 238,
    "payment_id": "TEST_15427033321774",
    "signature": "96c+hWk1zweuGKwDRrl+DZrjJXZw7ew6ow3RpGYv4U...=="
  },
  "customer": {
    "ip_address": "192.0.2.0"
  },
  "payment": {
    "amount": 0,
    "currency": "USD"
  },
  "etoken": {
        "token": "..."
    }
}

{
  "general": {
    "project_id": 238,
    "payment_id": "TEST_15427033321774",
    "signature": "96c+hWk1zweuGKwDRrl+DZrjJXZw7ew6ow3RpGYv4U...=="
  },
  "customer": {
    "ip_address": "192.0.2.0"
  },
  "payment": {
    "amount": 0,
    "currency": "USD"
  },
  "etoken": {
        "token": "..."
    }
}

Callback format

The Google Pay method uses the standard format for callbacks to deliver results. For more information, see Payment instrument verification.

Useful links

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

• 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 models and statuses—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 by using Payment Page.
• Information of operations performing—about error and response codes that are used in the payment platform to record information about performing of operations.

General information

For the Google Pay method, it is possible to test one-step and two-step purchases by using Payment Page and Gate, as well as payment card verification by using Gate. To enable and disable testing, as well getting assistance with setting up a test project, refer to ecommpay technical support.

When performing a test payment, take into account that you must specify the identifier of the test project in the requests, and the interfaces of the payment forms emulator of Payment Page and the 3‑D Secure 2 authentication page may differ from the production environment. At the same time to process a test payment it is necessary to use verified payment cards previously registered in the Google Pay service. This does not influence the processing of real payments by using such cards, but allows to perform full-fledged testing. In order to test purchases by using Gate it is necessary to prepare the web-service for interaction with the Google service (more information is presented in the section Purchases by using Gate).

Statuses of test payment and operations

The final status of test payments and operations is determined by the amount specified in the request.

Test one-step and two-step purchases:

• 1000 amount to get the success status
• 2000, 5000 or 10001 amount to get the decline status

Test payment card verification:

• 0 amount to get the success status
• any other amount to get the decline status

One-step purchases by using Payment Page

To perform a test one-step purchase by using Payment Page, do the following:

1. Send a correct test request for Payment Page opening to the payment platform.
2. If the card or google_pay_host method was not specified in the request—select the method on the emulator page.
3. If the authentication page is displayed pass the 3‑D Secure 2 authentication.
4. Receive the final callback with information about the payment result.

More information about processing purchases by using the Google Pay method via Payment Page is provided in the Purchase by using Payment Page section.

One-step purchases by using Gate

To perform a test one-step purchase by using Gate, do the following:

1. Send a correct test request for purchase to the payment platform.
2. If you receive the callback with the 3‑D Secure 2 authentication redirection data:
   1. Perform the redirection and pass the 3‑D Secure 2 authentication.
   2. Send the payment completion request. It is required to use the cres parameter and specify the following value in the request:

      ewogICAiYWNzUmVmZXJlbmNlTnVtYmVyIiA6ICJBQ1NFbXUyIiwKICAgImFjc1RyYW5zSUQiIDogIjAwMDAwMDAwLTAwMDUtNWE1YS04MDAwLTAxNmRiNjMzNzZlYiIsCiAgICJtZXNzYWdlVHlwZSIgOiAiQ1JlcyIsCiAgICJtZXNzYWdlVmVyc2lvbiIgOiAiMi4xLjAiLAogICAidGhyZWVEU1NlcnZlclRyYW5zSUQiIDogIjZmMmM3OGFkLTFjOWMtNTI2ZC04MDAwLTAwMDAwMDAwMTA2YiIsCiAgICJ0cmFuc1N0YXR1cyIgOiAiWSIKfQ

3. Receive the final callback with information about the payment result.

More information about processing purchases by using the Google Pay method via Gate is provided in the Purchases by using Gate section.

One-step purchases by performing authorization hold via Payment Page and capture or cancellation via Gate

To perform a test one-step purchase by performing authorization hold via Payment Page and capture or cancellation via Gate, do the following:

1. Send a correct test request for Payment Page opening to the payment platform.
2. If the card or google_pay_host method was not specified in the request—select the method on the emulator page.
3. If the authentication page is displayed pass the 3‑D Secure 2 authentication.
4. Accept a callback with information about successful authorization hold.
5. Send a capture or cancellation request.
6. Receive the final callback with information about the result.

More information about processing purchases by using the Google Pay method via Gate is provided in the Purchase by using Payment Page and Purchases by using Gate sections.

One-step purchases by performing authorization hold and capture or cancellation via Gate

To perform a test one-step purchase by performing authorization hold and capture or cancellation via Gate, do the following:

1. Send a correct test request for Payment Page opening to the payment platform.
2. If you receive the callback with the 3‑D Secure 2 authentication redirection data:
   1. Perform the redirection and pass the 3‑D Secure 2 authentication.
   2. Send the payment completion request. It is required to use the cres parameter and specify the following value in the request:

      ewogICAiYWNzUmVmZXJlbmNlTnVtYmVyIiA6ICJBQ1NFbXUyIiwKICAgImFjc1RyYW5zSUQiIDogIjAwMDAwMDAwLTAwMDUtNWE1YS04MDAwLTAxNmRiNjMzNzZlYiIsCiAgICJtZXNzYWdlVHlwZSIgOiAiQ1JlcyIsCiAgICJtZXNzYWdlVmVyc2lvbiIgOiAiMi4xLjAiLAogICAidGhyZWVEU1NlcnZlclRyYW5zSUQiIDogIjZmMmM3OGFkLTFjOWMtNTI2ZC04MDAwLTAwMDAwMDAwMTA2YiIsCiAgICJ0cmFuc1N0YXR1cyIgOiAiWSIKfQ

3. Accept a callback with information about successful authorization hold.
4. Send a capture or cancellation request.
5. Receive the final callback with information about the result.

More information about processing purchases by using the Google Pay method via Gate is provided in the Purchases by using Gate section.

Payment card verification by using Gate

To process a test payment card verification by using Gate, send a valid test request for a verification to the payment platform and receive a final callback with information about the verification result. More information about performing payment card verification by using the Google Pay method via Gate is provided in the Payment card verification section.