Overview

To create a checkout instance, you need an access token from the Authentication API. To get the access token, you need your API credentials, which you can get from the Dashboard.

📘

The authentication service URL and other service URLs are available in the API endpoints section.

1. Generate an access token by executing a POST {peach-auth-service}/api/oauth/token request with your client ID, client secret, and merchant ID.

   cURL

   curl --location --request POST '{peach-auth-service}/api/oauth/token'  
   --header 'content-type: application/json'  
   --data-raw  
   '{  
       "clientId": "{{clientId}}",  
       "clientSecret": "{{clientSecret}}",  
       "merchantId": "{{merchantId}}"  
   }'
   

2. The Authentication API responds with an access token.

   JSON

   {  
       "access_token": "<access token>",  
       "expires_in": "<token expiry duration in seconds>",  
       "token_type": "Bearer"  
   }
   

3. Make calls to the Embedded Checkout API with the access token in the authorisation header, for example, Authorization: Bearer {access_token}.

📘

• You can reuse the access token from step 2 for multiple API calls.
• When the token expires, you need to generate a new one.

See the Postman collection for more details on API authentication.

Code snippet

async function authenticate(clientId, clientSecret, merchantId) {
  let response = await fetch("<peach auth service>/api/oauth/token", {
    method: "POST",
    body: JSON.stringify({
      clientId,
      clientSecret,
      merchantId
    })
  });

  if (response.ok) {
    let body = await response.json();

    return body.access_token;
  } else {
    throw new Error("Unable to authenticate");
  }
}

async function createCheckoutId(token, body) {
  const response = await fetch("<checkout api>/v2/checkout", {
    headers: new Headers({
      "Authentication": `bearer ${token}`,
      "origin": "<base domain for site>"
    }),
    method: "POST",
    body: JSON.stringify(body),
  });

  if (response.ok) {
    return await response.json();
  } else {
    throw new Error("Unable to retrieve Checkout Id.");
  }
}

const bearerToken = await authenticate(clientId, clientSecret, merchantId);

const checkout = await createCheckoutId(bearerToken, body);