Tutorials Programming Tutorials, Guides & Best Practices

• Follow the prompts to create a basic Hardhat sample project.

• Install the OpenZeppelin Contracts library:

Steps to Set Up:

To build a DApp, you first need a smart contract that will serve as the backend logic. Let’s create a simple smart contract that allows users to store and retrieve a message on the blockchain.

Writing smart contracts requires attention to detail, especially when it comes to security and efficiency. Here are some best practices:

• Avoid Overflow/Underflow: Use Solidity’s SafeMath library to prevent arithmetic overflow and underflow.
• Use Modifiers for Access Control: Restrict who can execute certain functions using modifiers like onlyOwner.
• Gas Optimization: Write efficient code to minimize gas costs. Avoid unnecessary computations and storage operations.
• Audit and Test: Thoroughly test your contract and consider an external audit before deploying on the mainnet.