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---
title: >
UGE / L2 / Intro to relational databases / Python project prototype /
Money transfer platform specification
author: Pacien TRAN-GIRARD
date: 2021-07-24
...
# Project description
The goal is to create a platform on which users can send money to each others.
## Accounts
Unauthenticated visitors can to either create a new account or log in into an
existing one using their username and the matching password.
### Balance
Each account has a balance, which must remain non-negative at all times.
### Transaction log
Users can see a log of all of the financial transactions which involved them.
## Operations
### Deposit and withdrawal
Users can deposit and withdraw an arbitrary amount of money to and from their
account. Both operations are free.
### Money transfer
Users can send money between each others, referred to by their respective
usernames.
Each transaction between users has a fee of 10% of the transferred amount.
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