Introduction

This is an implementation of the examples in Modern Treasury's "Accounting For Developers" article series. The implementation includes both the example in part 2 of the series, a toy Venmo clone, and the example in part 3 of the series, a lending marketplace.

I have also extended the example in part 3 to use compound interest instead of simple interest.

Note that for the lending marketplace implementation, I've adjusted the interest calculation interval to minutes instead of months, so you can watch a 1-year investment or 1-year loan play out in 12 minutes instead of 12 months.

Getting started

1. Checkout the relevant commit:
   • 4e7b746 for toy Venmo clone
   • 5ffc66d for lending marketplace with simple interest
   • feeb8cd for lending marketplace with compound interest
2. Run pnpm install
3. Run pnpm dev
4. Run cd apps/backend && pnpm migration:run
5. Use Bruno and import the bruno folder to call the relevant APIs
6. Use your SQL database GUI of choice to observe how the account balances change.