JAVA SDK Integration

It is a client java library that provides an easy way to interact with the Paytm Mini App ecosystem.

This client provides the following features:

• Auth Client - It enables merchant backend services to identify the user and gain access on user details/token. Merchant can use these details to identify a user in its system or can create a new one if doesn't exist. Following methods/APIs are supported:

  • Fetch Access Token
  • Fetch User Profile

• MiniAppCommon Client - It exposes a few common functionalities which a merchant can use to interact with Paytm backend as:

  • Fetch OpenId
  • Send payment notification
  • Send pre-payment notification

Requirements

Java 1.7 or later.

Installing Mini Apps SDK with maven

1. Add the below maven repository to your project's POM.

   <repository>
       <snapshots>
           <enabled>true</enabled>
           <updatePolicy>always</updatePolicy>
       </snapshots>
       <id>snapshots</id>
       <name>libs-snapshot</name>
       <url>https://artifactorypg.paytm.in/artifactory/libs-snapshot</url>
   </repository>

2. Add the below maven dependency to your project's POM.

   <dependency>
       <groupId>com.paytm</groupId>
       <artifactId>miniapp-sdk-client</artifactId>
       <version>1.0.2-SNAPSHOT</version>
   </dependency>

3. Build and install locally by executing the command below:

   $ mvn install

Auth Client

try {
          HTTPServiceResponse<OauthTokenResponse> response = oauthClient.oauthToken(oauthTokenRequest, null);
       } catch (MiniAppClientException ex) {
         ErrorResponse errorResponse = ex.getError();
         Integer errorCode = ex.getErrorCode();
       }
// User Profile
// Create fetch user profile request
    UserProfileRequest userProfileRequest = new UserProfileRequest
                                                .Builder()
                                                .setScopeCode("<received from fetch access token api response: access_token>")
                                                .build();
                                                
   try {
          HTTPServiceResponse<OAuthUserProfile> response = oAuthClient.v2UserProfile(userProfileRequest);
       } catch (MiniAppClientException ex) {
         ErrorResponse errorResponse = ex.getError();
         Integer errorCode = ex.getErrorCode();
       }

MiniApp Common Client

// Configuring MiniApp Common client.
/*To create HttpClientProperties, 4 parameters are required
        *  1. socketTimeout - Integer
        *  2. connectionTimeout - Integer
        *  3. connectionRequestTimeout - Integer
        *  4. hostUri - String
        *  5. maxConnectionPerRoute - Integer (optional: default value is 5)
        *  4. 6. maxTotalConnections - Integer (optional: default value is 10)
        * */
        HttpClientProperties httpClientProperties = new HttpClientProperties
            .Builder()
            .setSocketTimeout(5000)
            .setConnectionTimeout(5000)
            .setConnectionRequestTimeout(5000)
            .setHostUri(""https://miniapps.paytm.com"")
            .build();

        MiniAppCommonClient commonClient = MiniAppCommonClient.getInstance(httpClientProperties,"<Auth Client ID received on onboarding>");

• Example of Fetch Open Id

PartnerOpenIdRequest partnerOpenIdRequest = new PartnerOpenIdRequest("<received from fetch access token api response: access_token>");
    try {
        HTTPServiceResponse<PartnerOpenIdResponse>; response = commonClient.getPartnerOpenId(partnerOpenIdRequest);
    } catch (MiniAppClientException ex) {
        ErrorResponse errorResponse = ex.getError();
        Integer errorCode = ex.getErrorCode();
    }

• Example of Send Payment Notification

Map<String, String> payload = new HashMap();
    payload.put("name", "<name>");
    payload.put("vertical", "<vertical>");
    payload.put("url", "<url>");
    PartnerNotificationRequest request = new PartnerNotificationRequest.Builder()
            .setMid("<merchant mid received on onboarding>")
            .setNotificationPayload(payload)
            .setOpenId("<received from fetch open id>")
            .setOrderId("<paytm order id received after placing order>")
            .setTemplateName("<notification template name received on onboarding>").build();
    try {
        HTTPServiceResponse<PartnerNotificationResponse> response = commonClient.sendPartnerNotification(request);
    } catch (MiniAppClientException ex) {
        ErrorResponse errorResponse = ex.getError();
        Integer errorCode = ex.getErrorCode();
    }

• Example of Send Pre-Payment Notification

Map<String, String> payload = new HashMap();
    payload.put("name", "<name>");
    payload.put("vertical", "<vertical>");
    payload.put("url", "<url>");
    PartnerPrePaymentNotificationRequest request = new PartnerPrePaymentNotificationRequest.Builder()
            .setMid("<merchant mid received on onboarding>")
            .setNotificationPayload(payload)
            .setOpenId("<received from fetch open id>")
            .setBookingId("<order/booking id of placed order>")
            .setBookingTime("<order/booking time in ms>")
            .setTemplateName("<notification template name received on onboarding>").build();
    try {
        HTTPServiceResponse<PartnerPrePaymentNotificationResponse> response = commonClient.sendPartnerPrePaymentNotification(request);
    } catch (MiniAppClientException ex) {
        ErrorResponse errorResponse = ex.getError();
        Integer errorCode = ex.getErrorCode();
    }

Exceptions