OTP Service API (One-Time Password)

This project implements a RESTful service for generating and validating One-Time Passwords (OTP) based on the user's phone number. It is built with Python (Flask) and uses a SQL-based database to store OTP codes. This OTP Service API was used for implementation in client's application.

Features

• Generate a unique 4-digit OTP code per user
• Limit OTP generation (no more than 10 codes per user within 2 hours)
• Ensure code uniqueness per user
• Validate only the most recent and unused code
• Prevent code reuse
• Log every request to a log file

Technologies

• Python 3.8+
• Flask
• SQLite or any other SQL-based database
• REST API