Proof of Concept: AMQP based Financial transaction service

1. Encryption and decryption of payload.
   • En-/De-cryption implemented according to Sarvatra standard algorithm
   • Module is complete and integrated after successful testing
2. Generation of payload.
   • Minimal wrapper over a HashMap for generating JSON payload procedurally.
   • Default values handled
   • TLV (Tag-Length-Value) format generation
   • Module is functional and has been integrated for creating payloads in the HTTP communication module
3. HTTP communication with the Sarvatra test server.
   • Using volley API
   • Login request is sent for beginning the session
   • Response from Login is parsed for session key and other session details
   • Transaction request for transactions along with the saved session key from Login is sent and the response is used to show success status of the txn
   • Module is functional and its implemented for cash withdrawal (Can be extended for other transactions)
4. RD Service API (fingerprint scanner)
   • Mantra RD service API is called for safely reading fingerprint data
   • Module was tested independently and has been integrated for using the returned encrypted data for HTTP requests
5. Creating a UI for Agent Login and transactions
   • Basic UI has been created for Login, Transaction and Success
   • The binding from UI inputs to final HTTP requests has been commented to avoid sending invalid data to Sarvatra test server during development