Android SDK allows you to accept Google Pay payments from Android application.

Google Pay direct integration¶

Google Pay direct integration can be done in two ways

Both types of integration require Google Pay API to be implemented by merchant.

Using decrypted PAN (DPAN)¶

Integration with DPAN assumes that Payment Data Cryptography is performed on merchant side.

To create order using DPAN, merchant needs to use create order with direct method.

While the parameters are still as described, the parameters which are related to card data should contain information from Google Pay decrypted payment data:

Google Pay DPAN data parameters

requestresponse

Parameters	Type	Mandatory	Description
`card_number`	string(19)	optional	`pan` from Google Pay `paymentMethodDetails` object
`expiry_date`	string(4)	optional	DPAN expiry date in format MMYY
`cavv`	string(2048)	optional	Google Pay one-time `cryptogram` from `paymentMethodDetails` object
`eci`	string(2048)	optional	Google Pay `eciIndicator` from `paymentMethodDetails` object
`wallet`	string(2048)	optional	Wallet type: `googlepay`
`schemeid`	string(2048)	optional	Visa/MasterCard identifier of CIT - client initiated transaction, returned in initial purchase in field `additional_info->schemeid`, see response parameters

see response parameters

Pay attention

Google Pay and 3DSecure

3DSecure authentication can be required for Google Pay in Georgia.

Consider this when implementing create order with direct as it can require two-steps flow:

create order: POST /api/3dsecure_step1
submit 3DSecure data: POST /api/3dsecure_step2

Pay attention

Recurring payments with Google Pay

Flitt supports recurring payments for Google Pay.

Depending on the parameters which are sent during order creation, order is considered as CIT (client initiated transaction) or MIT (merchant initiated transaction)

CIT: cavv is mandatory, schemeid must not be present

MIT: schemeid is mandatory, cavv must not be present

Examples

Request example of client initiated transaction:

{
  "request": {
    "order_id": "test_12343242",
    "merchant_id": "1549901",
    "order_desc": "Test order",
    "amount": 1000,
    "currency": "GEL",
    "card_number": "4111111111111111",
    "cavv": "AEH2lSgIQ9/OAALA1DWsGgADFA==",
    "eci": "05",
    "wallet": "googlepay",
    "expiry_date": "1135",
    "client_ip": "8.8.8.8",
    "server_callback_url": "https://myserver.com/callback",
    "signature": "0c0c2374c73267e7be560d80834e4ba28ccda7aa"
  }
}

Request example of merchant initiated transaction:

{
  "request": {
    "order_id": "test_12343243",
    "merchant_id": "1549901",
    "order_desc": "Test order",
    "amount": 1000,
    "currency": "GEL",
    "card_number": "4111111111111111",
    "schemeid":"885056510569385"
    "eci": "05",
    "wallet": "googlepay",
    "expiry_date": "1135",
    "client_ip": "8.8.8.8",
    "server_callback_url": "https://myserver.com/callback",
    "signature": "0c0c2374c73267e7be560d80834e4ba28ccda7aa"
  }
}

Using encrypted payment data¶

Integration with encrypted payment data assumes that Payment Data obtained from Google Pay is not decrypted on merchant side.

Instead of that, container parameter must be transferred with method create order with direct to Flitt.

While the parameters are still as described, the parameters card_number, expiry_date, cavv, eci, wallet , schemeid which are related to card data must be replaced with container parameter.

Google Pay request example with container

{
  "request": {
    "amount": "100",
    "currency": "GEL",
    "merchant_id": "1549901",
    "order_desc": "Test order",
    "order_id": "test_12343243",
    "container": "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",
    "signature": "3cfdd28f00ae8f3db6f4dfb816af3a693e0719c8"
  }
}

where container is BASE64 encoded JSON object which have next structure:

Google Pay container structure

{
  "signature": "MEYCIQDN2b4yywOOLnndqZ/d4nPrjebt...EoNh5XXRTJsrbM8O4OpS0kjCLN3p5",
  "intermediateSigningKey": {
    "signedKey": "{\"keyValue\":\"MFkwEwYHKoZIzj0CAQYIKoZIzj0DAQcD...+SoL6G8Q34oRhEx5iUu3KUAeTSl3JjAmi226tTD+Py2Q\\u003d\\u003d\",\"keyExpiration\":\"1749804976000\"}",
    "signatures": [
      "MEYCIQDe7PqsDkcgSW///V/pJomACq/3jPq+vvba/...PUrsIZKSbwNaUZDZqWIT1oARCU"
    ]
  },
  "protocolVersion": "ECv2",
  "signedMessage": "{\"encryptedMessage\":\"yMuwPaQGTjvL8pCEsConA0NSVw0MQa+Jn2aJSsiuS5rgKKVW2mr2rTvZ8GYYONtnizQHfPwUT/MtvtkmoosP9bruN31EUHZf56xekmcP975EoPmAeIWTcWG3dz2fQcOSXqnBFcN8PJHU1MJ0rlXamCX4fwyY+9HbWw2eCPM696NyqxyyI0tJNc3rL5qJImT8...BvJcUQH+QDXsplvQkYbxCjG+q44/KlKtmw47JQtsJt2asYvGAM1iI0wOoszHi9Lmb3LDh6tucskRHkfL3487jzZCChI6/2VYY/vTj+keeOWINNkUZLUe0uz1jqgEFXuvFUrqP37yPriEg+7iL22poRAIRW/F0uZAyR/NsiQpOCeUMBjp8\\u003d\",\"ephemeralPublicKey\":\"BAh+kEuWYwQulMSRxi1X8WGawYYfhSpXzrfdJ0+qlnCLEA9GklG2Dtl+hymJnjjbUHscPOed+VT5VpkrJZ0DZAk\\u003d\",\"tag\":\"aEDHzlHdI2Uh/pkT9/FrQ285+AvSjdpkXfyyxYZu79I\\u003d\"}"
}