Authentication

Prior to attempting to process a transaction the host website must complete authentication with the DNA platform. The authentication process is unique for each transaction and utilises the test account credentials which are supplied following the configuration of the merchant test account, namely;

• TerminalID
• ClientID
• ClientSecret

Authentication POST - Request

Authentication is completed via a POST request to the test URL shown below.

URL

https://test-oauth.dnapayments.com/oauth2/token

Security Risk

The “client_secret” must always be stored securely. Do not send authorisation requests from the front-end as the user could access the data via the web browser’s console.

The POST must contain the below data.

Authentication Request
Field Name	State	Data Type	Description
grant_type	Mandatory	String	Authorisation type required to confirm the action required. client_credentials Obtain credentials required to process a transaction.
scope	Mandatory	String	Confirm scope of the action to be performed with credentials. payment integration_hosted Full re-direct. payment integration_embedded JavaScript Lightbox - content delivered via iFrame. payment integration_seamless JavaScript Lightbox - content hosted on merchant site. webapi Transaction management. payment integration_seamless must be used if you are using our Hosted Fields solution.
client_id	Mandatory	String	Provided to the integrator following the successful creation of a test account.
client_secret	Mandatory	String	Provided to the integrator following the successful creation of a test account.
invoiceId	Mandatory	String	Order/invoice/transaction/basket number generated by the host website. This ID must be unique for this transaction.
amount	Mandatory	Decimal	Total amount of the order including decimal places where applicable. ‘Whole’ amounts (e.g. “1”) on a GBP account will be processed as £1.00.
currency	Mandatory	String	Currency of the transaction. GBP Pound Sterling
terminal	Mandatory	String	Provided to the integrator following the successful creation of a test account.

Authentication POST - Response

Following the receipt of a correctly formatted authorisation POST the DNA platform will respond with the below.

Field Name	Data Type	Description
access_token	String	Access token provided by the DNA platform for this transaction. The token should be securely stored ready to be used in the transaction request.
expires_in	Integer	Number of seconds from generation until the access_token expires. If the token is not used before this time has passed a new token will need to be requested.
refresh_token	String	Reserved for future use.
scope	String	Confirmation of the scope(s) passed in the authorisation request.
token_type	String	Type of token issued Bearer Bearer token

Example Request and Response

Request

Example: Authentication Request (NodeJs)

var request = require("request");

var options = {
    method: 'POST',
    url: 'https://oauth.dnapayments.com/oauth2/token',
    formData:
    {
        scope: 'payment integration_hosted',
        client_id: 'ExampleShop',
        client_secret: 'mFE454mEF6kmGb4CDDeN6DaCnmQPf4KLaF59GdqwP',
        grant_type: 'client_credentials',
        invoiceId: '1234567',
        amount: '1',
        currency: 'GBP',
        terminal: 'b95c9d1f-132f-4e04-92d2-32335c7486ea'
    }
};
request(options, function (error, response, body)
{
    if (error) throw new Error(error);
    console.log(body);
});

Response

Example: Authentication Response

{
  "access_token":"qy/ZWj049WHUZj+8i1pUwmYxswo4GXK+Z5",
  "expires_in": 7200,
  "refresh_token":"",
  "scope":"payment integration_hosted",
  "token_type":"Bearer"
}

The Response you receive is passed in almost verbatim, later in the Google Pay Direct process.