Truffle Development Tutorials, Guides & Insights

• Description: A static analysis tool for Solidity smart contracts, focused on security.
• Key Features:
• Detects security vulnerabilities and best practice violations.
• Integrates with CI/CD pipelines for continuous security testing.
• Provides detailed analysis and recommendations.
• Compatible with all Solidity versions.
• Website: Slither

• Description: A scalable API and development suite for connecting to the Ethereum blockchain.
• Key Features:
• Provides reliable access to Ethereum and IPFS without needing to run your own nodes.
• Supports various Ethereum networks, including mainnet and testnets.
• Provides WebSocket and HTTP APIs for interacting with the blockchain.
• Integrates seamlessly with Truffle, Hardhat, and other frameworks.
• Website: Infura

• Node.js and npm: Node.js is required to run the development environment, and npm is used to manage packages.
• Truffle or Hardhat: These are development frameworks for Ethereum. You can use either one, but for this tutorial, we will use Hardhat.
• MetaMask: A browser extension wallet to interact with your smart contract.
• OpenZeppelin Contracts: A library of secure smart contract components.

• Open a terminal and create a new directory for your project:

Update MyDapp.sol:

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

contract MyDapp {
    string public ipfsHash;

    event IPFSHashChanged(string newIPFSHash);

    function setIPFSHash(string memory newIPFSHash) public {
        ipfsHash = newIPFSHash;
        emit IPFSHashChanged(newIPFSHash);
    }

    function getIPFSHash() public view returns (string memory) {
        return ipfsHash;
    }
}