Velocity Limits Validator 💸

About The Project 📙

In finance, it's common for accounts to have so-called "velocity limits". This program accepts or declines attempts to load funds into customers' accounts in real-time. The program will read load attempts, line by line from input.txt and save a single-line JSON payload for each load attempt in generated-output.txt.

Each customer is subject to three limits:

• A maximum of $5,000 can be loaded per day
• A maximum of $20,000 can be loaded per week
• A maximum of 3 loads can be performed per day, regardless of amount

If a load ID is observed more than once for a particular user, all but the first instance will be ignored.

Running The Project 🏃🏽‍♀️

1. If you haven't already, install Go: "https://golang.org/doc/install"
2. Clone this repo using git clone https://github.com/luminaire-dev/velocity-limits.git or git@github.com:luminaire-dev/velocity-limits.git
3. Open terminal or cmd prompt and cd into the velocity-limits directory

Run the project:

make run

Run the unit tests:

make test

Compare the generated output against the expected output using diff. (No output means the files match ✔️ )

make compare

Project Structure

.
├── processor                     
│   ├── processor.go               # Business logic - approves or rejects the incoming load based on limits validation
│   ├── processor_test.go          # Unit tests 
│   └── models.go                  # Contains common structs used by processor.go and processor_test.go
├── main.go                        # Reads input line by line and generates output file
├── main_test.go                   # Unit tests 
├── input.txt                      # Contains all load attempts
├── output.txt                     # Expected output
├── generated_output.txt           # output generated by the program
└── Makefile                       # Makefile

Assumptions

All input data (in input.txt) is valid and formated in proper JSON objects