0xkyng/Functions-and-Errors---ETH-AVAX

User Registry Smart Contract

Introduction

The User Registry Smart Contract is a Solidity contract designed to implement and showcase the usage of require(), assert(), and revert() statements. It manages user registrations on the Ethereum blockchain, providing a simple and secure way to register, deregister, and check the registration status of users.

Features

• User Registration: Allows users to register by adding their Ethereum address to the registry.
• Deregistration: Provides a mechanism for users to deregister if needed.
• Registration Status Check: Allows anyone to check whether a specific Ethereum address is registered.

Smart Contract Details

• Solidity Version: 0.8.8
• License: MIT (See LICENSE)

Smart Contract Functions

registerUser(address user)

Registers a user by adding their Ethereum address to the registry.

Parameters:

• user (address): Ethereum address of the user.

Note: This function uses the require() statement to ensure that a user cannot be registered more than once.

deregisterUser(address user)

Deregisters a user by removing their Ethereum address from the registry.

Parameters:

• user (address): Ethereum address of the user.

Note: This function uses the require() statement to ensure that only registered users can be deregistered. It also uses revert() to provide a specific error message if the user is not registered.

isRegistered(address user)

Checks if a user is registered.

Parameters:

• user (address): Ethereum address of the user.

Returns:

• true if the user is registered.
• false if the user is not registered.

Note: This function uses the assert() statement to ensure that the registration status check is accurate.