Transfer Scheduler

Transfer Scheduler is a technical challenge project for Elo7 in Java.

Dependencies

The project is built using Maven 3, every dependency is managed by Maven.

Design decisions

Transfer amount is set as an integer with 10e-2 precision. When calculating fees which relies on percentages it's converted to a 10e-3 precision and the resulting fee is rounded with Math.round().

Usage

1. Build the application using Maven 3 (mvn assembly:assembly)
2. Run the .jar built with java -jar target/paymentscheduler-0.0.1-SNAPSHOT-jar-with-dependencies.jar in the PROJECT_HOME.

The following REST requests are supported:

1. GET /api/transfers/scheduled
   • Returns: a JSON list of all scheduled transfers
2. GET /api/transfers/scheduled?uuid=TRANSFER_UUID
   • Returns: data about a single transfer with uuid TRANSFER_UUID
3. POST /api/transfers/scheduled
   • Receives:
     • origin_account - Origin account number using format XXXXX-X
     • destination_account - Destination account number using format XXXXX-X
     • scheduled_date - Date formatted as ISO 8601
     • transfer_amount - Amount to be transferred in integer, $0.01 = 1
     • operation_type - Transfer operation type, can 'A', 'B', 'C' or 'D'.
   • Returns:
     • SUCCESS a JSON representation of the newly created scheduled transfer
     • FAILURE a JSON error string and status code 400

Requirements

1. The user may schedule a financial transfer with the following information:
   • Origin account (XXXXX-X format)
   • Destination account (XXXXX-X format)
   • Transfer amount
   • Fee (to be calculated)
   • Scheduled date
   • Type (A, B, C, D):
     • A: Type A operations have a $2 fee plus 3% of the transfer amount.
     • B: Type B operations have a $10 fee when scheduled until 30 days of the creation date and $8 otherwise.
     • C: Type C operations have a regressive fee based on scheduled date:
       • after 30 days from creation date - 1.2% fee
       • until 30 days from creation date - 2.1% fee
       • until 25 days from creation date - 4.3% fee
       • until 20 days from creation date - 5.4% fee
       • until 15 days from creation date - 6.7% fee
       • until 10 days from creation date - 7.4% fee
       • until 5 days from creation date - 8.3% fee
     • D: Type D operations have a fee equal to A, B or C types depending on the transfer amount:
       • Transfer amount until $25,000 = type A fee
       • Transfer amount between $25,001 and $120,000 = type B fee
       • Transfer amount greater than $120,000 = type C fee
2. The user may see every scheduled transfer inputed.