This project is a Java-based AWS Lambda function that handles payment requests from Wayforpay payment provider. When a payment request is received, the function generates a response and sends an SMS notification to the client.
It includes an implementation of the RequestHandler interface, which requires the handleRequest() method to be implemented. The method takes a ServiceRequest object as input, sends an SMS using an instance of SmsService, and returns a ServiceResponse object.
The calculateServiceResponse() method creates a signature for the order request data using a HMAC-MD5 algorithm with a shared MERCHANT_SECRET key.
The code imports necessary packages and defines class-level variables for the Gson library, an SMS service, and a shared key. It also includes a utility method stringToHMACMD5() that creates an HMAC-MD5 signature from a given string. After calculation, this lambda 'endpoint' returns status code 200 and String object, in order to verify sent request.
The string subject to HMAC_MD5 is generated by concatenating the parameters orderReference, status, time separated by ";" (semicolon) in UTF-8 encoding
{ "orderReference":"DH783023", "status":"accept", "time":1415379863, "signature":"" }
- Clone the repository
- Register in Wayforpay to obtain Merchant Secret Key
- Register in SmsClub.mobi in order to use their API
- Create Java 8 lambda function in pair with API Gateway
- Configure system variables (MERCHANT_SECRET, SMS_CLUB_TOKEN, SMS_SENDER_NAME) through Environment Variables tab in Settings of lambda function
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mvn clean package
- Deploy your lambda to aws by uploading or through S3bucket
- Test you lambda with testEvent.json from event package