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Decentralized Applications Development Tutorials, Guides & Insights

Unlock 8+ expert-curated decentralized applications tutorials, real-world code snippets, and modern dev strategies. From fundamentals to advanced topics, boost your decentralized applications skills on DeveloperBreeze.

Tutorial

Etherscan vs Infura: Choosing the Right API for Your Blockchain Application

  • Etherscan:
  • Primarily a block explorer and data provider. It offers read-only access to Ethereum blockchain data such as transaction histories, balances, token transfers, and more.
  • Does not allow real-time interaction with the blockchain (e.g., sending transactions).
  • Ideal for querying historical data and performing analytics on blockchain data.
  • Infura:
  • Provides full node access to the Ethereum network, allowing developers to interact with the blockchain in real-time.
  • Supports read and write operations, such as sending transactions, deploying smart contracts, and interacting with dApps.
  • Best for applications that require real-time interaction with Ethereum, such as decentralized apps (dApps).

You should use Etherscan when you need to read data from the Ethereum blockchain, such as querying transaction details, wallet balances, or token transfers. Etherscan is a powerful tool for building blockchain explorers or applications that focus on data analytics.

Oct 24, 2024
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Tutorial

ETH vs WETH: Understanding the Difference and Their Roles in Ethereum

  • To retrieve the original ETH, users can exchange their WETH back through the smart contract.
  • The contract will burn the WETH and return the original ETH to the user.

Example on a DEX like Uniswap:

Oct 24, 2024
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Tutorial
rust

Using Solana's Program Library: Building Applications with Pre-Built Functions 

anchor init solana-spl-tutorial
cd solana-spl-tutorial

This will create a new Anchor project with a predefined directory structure.

Aug 27, 2024
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Tutorial
solidity

Understanding Gas and Optimization in Smart Contracts

  • Arithmetic Operations: Adding, subtracting, or multiplying integers consumes minimal gas (e.g., 3-5 gas units).
  • Storage Operations: Writing data to the blockchain (e.g., updating a state variable) is expensive (e.g., 20,000 gas units).
  • Function Calls: Calling a function, especially one that interacts with another contract, can significantly increase gas consumption.

Optimizing gas consumption in smart contracts can lead to substantial cost savings, especially for frequently executed contracts. Here are some strategies to consider:

Aug 22, 2024
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Tutorial
solidity

Building a Decentralized Application (DApp) with Smart Contracts 

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Message DApp</title>
</head>
<body>
    <h1>Decentralized Message Store</h1>
    <input type="text" id="messageInput" placeholder="Enter a new message">
    <button onclick="setMessage()">Set Message</button>
    <p id="currentMessage">Loading message...</p>

    <script src="https://cdn.jsdelivr.net/npm/web3@latest/dist/web3.min.js"></script>
    <script>
        const contractAddress = 'YOUR_CONTRACT_ADDRESS';
        const abi = [/* ABI from compiled contract */];

        const web3 = new Web3(Web3.givenProvider);
        const contract = new web3.eth.Contract(abi, contractAddress);

        async function setMessage() {
            const accounts = await web3.eth.getAccounts();
            const message = document.getElementById('messageInput').value;
            await contract.methods.setMessage(message).send({ from: accounts[0] });
            loadMessage();
        }

        async function loadMessage() {
            const message = await contract.methods.getMessage().call();
            document.getElementById('currentMessage').innerText = message;
        }

        window.onload = loadMessage;
    </script>
</body>
</html>
  • Web3.js: A JavaScript library for interacting with the Ethereum blockchain.
  • contract.methods.setMessage(message).send({ from: accounts[0] }): Calls the smart contract’s setMessage function and sends a transaction to the blockchain.
  • contract.methods.getMessage().call(): Calls the smart contract’s getMessage function to retrieve the stored message.

Aug 22, 2024
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