Test task for the PY developer in AuraX | Test Demo Task: Financial System CLI with Agile Practices

DemoTaskAuraX.md

Overview
Aura x Capital is seeking a Middle-Level Python Developer to work on a crypto swap and limits exchange system. In this task, you’ll build a simple Python-based crypto transaction processor that simulates a swap operation between two wallets, updates their balances, and logs the transaction.

Task Requirements

1. Create a Python script that processes a mock crypto swap between two wallets, updating their balances and logging the transaction.

2. • Implement a Wallet class to manage balances (in a fictional “TONcoin” currency).
   • Simulate a swap by deducting an amount from one wallet and adding it to another, including a 1% transaction fee (e.g., for 100 TONcoin sent, 1 TONcoin is taken as a fee, and 99 TONcoin is received).
   • Log each transaction with a timestamp, sender, receiver, amount sent, fee, and amount received in a list or file.
3. • Define a Wallet class with attributes (e.g., address, balance) and methods (e.g., deduct, add).
   • Define a Transaction class to handle the swap logic, interacting with Wallet instances.
   • Use encapsulation (e.g., private attributes with getters/setters if needed) and clear method design.
4. • Include comments in the code explaining how your implementation could be extended by a team (e.g., adding TON blockchain calls).
   • Provide a brief README (or comments) describing:
     • How this task fits into an Agile sprint (e.g., as a user story or task).
     • How you’d collaborate with team members (e.g., QA for testing, frontend for UI integration).
5. • Simulate a TON blockchain call with a simple function (e.g., mock_ton_swap(address_from, address_to, amount) returning a success flag). This represents a real-world TON library call without requiring actual setup.

Deliverables

• A Python script (crypto_processor.py) with the solution.
• A README file or inline comments addressing teamwork and Agile aspects.
• Submit via a GitHub repository link.

Guidelines

• Use Python 3.x.
• Keep the task simple; no real blockchain setup is needed—focus on the logic and structure.
• Assume the mock TON call always succeeds for simplicity.
• Estimated completion time: 2-4 hours.

Example Output
If Wallet A (balance: 500 TONcoin) swaps 100 TONcoin to Wallet B (balance: 200 TONcoin):

• Wallet A balance becomes 400 TONcoin (500 - 100).
• Wallet B balance becomes 299 TONcoin (200 + 99, after 1% fee).
• Log entry: "2025-03-25 06:45:00 - A -> B: Sent 100 TONcoin, Fee 1 TONcoin, Received 99 TONcoin".