gks2022004/error_handling_metacrafter

Error Handling

This smart contract demonstrates different error handling techniques using the require, assert, and revert statements. It is important to properly handle errors in smart contracts to ensure the security and integrity of the blockchain.

Description

The contract keeps track of balances in a mapping called 'balances'. The mapping maps addresses to uint values, allowing us to store a numeric balance for each address.

deposit function

The deposit function takes in an amount (_amount) and increments the balance mapping for msg.sender by that amount. This "deposits" new tokens into the user's account balance.

withdrawRequire function

First it validates that the balance for msg.sender is sufficient to withdraw the requested _amount using require. If not enough balance, it will revert with an error message. If there is enough balance, it decrements the mapping value by _amount to "withdraw" that amount.

withdrawAssert function

Similar to withdrawRequire, but uses assert to check the balance condition. If assertion fails, the transaction is reverted without a custom message.

withdrawRevert function

Uses an if statement to check the balance condition. If balance is insufficient, it reverts with a custom error message, and also returns the remaining gas back to the caller. Otherwise, decrements the balance to withdraw the tokens.

Execution

To run this program, you can use Remix, an online Solidity IDE. To get started, go to the Remix website at https://remix.ethereum.org/ Then compile this required file, and then deploy it.

License

This project is licensed under the MIT License - see LICENSE for details