Essentially the kata is asking us to fit a puzzle piece into an existing environment. Our piece sits between a REST API and some consumer set to call our `retrieve` function. The consumer will pass arguments. It will expect the data to be formatted a certain way and be wrapped in a promise. And we will be swimming in Node.js and ES6 Javascript!
I save all of my expenses to my budget site. It boasts an easy-to-use interface and can import all expense activity from CSVs that I download from my bank. Overage tabs appear when I’m over budget for a category or subcategory for a given month. Graphs and charts can be plotted for any (sub)category over any range of dates. The admin area provides tools for editing purchases.
