DeveloperBreeze

Blockchain Development Programming Tutorials, Guides & Best Practices

Explore 30+ expertly crafted blockchain development tutorials, components, and code examples. Stay productive and build faster with proven implementation strategies and design patterns from DeveloperBreeze.

Tutorial

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

const ethers = require('ethers');

// Replace with your Infura Project ID
const infuraProvider = new ethers.JsonRpcProvider('https://mainnet.infura.io/v3/YOUR_INFURA_PROJECT_ID');

// Replace with your wallet's private key
const privateKey = 'YOUR_PRIVATE_KEY';

// Create a wallet instance and connect it to Infura
const wallet = new ethers.Wallet(privateKey, infuraProvider);

// Replace with the recipient's Ethereum address
const recipientAddress = '0xRecipientEthereumAddress';

// Amount to send (in Ether)
const amountInEther = '0.01';

async function sendTransaction() {
  try {
    const tx = {
      to: recipientAddress,
      value: ethers.utils.parseEther(amountInEther),
      gasLimit: 21000, // Gas limit for a basic transaction
      gasPrice: await infuraProvider.getGasPrice() // Get current gas price from Infura
    };

    // Send the transaction
    const transaction = await wallet.sendTransaction(tx);
    console.log('Transaction Hash:', transaction.hash);

    // Wait for the transaction to be mined
    const receipt = await transaction.wait();
    console.log('Transaction Confirmed:', receipt);
  } catch (error) {
    console.error('Error sending transaction:', error);
  }
}

sendTransaction();
  • API: This script uses Infura’s node access and Ethers.js to send Ether in real-time.
  • Use Case: Essential for dApps, wallets, or any application needing to send transactions or interact with the blockchain live.

Oct 24, 2024
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Tutorial

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

Ethereum predates the ERC-20 token standard, which was introduced to standardize token creation on the blockchain. Since ETH doesn't conform to this standard, it cannot be directly used in many decentralized applications that rely on ERC-20 tokens. WETH solves this problem by allowing ETH holders to wrap their ETH into an ERC-20 compatible token that can be used across a wide range of DeFi protocols and dApps.

WETH essentially bridges the gap between ETH and the broader ERC-20 ecosystem, allowing ETH to function seamlessly in DeFi, token swaps, and other smart contract interactions.

Oct 24, 2024
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Tutorial
rust

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

Once the build is complete, deploy the program using the following command:

anchor deploy

Aug 27, 2024
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Tutorial
solidity

Understanding Gas and Optimization in Smart Contracts

2. Gnosis Safe

  • Optimization: Gnosis Safe optimized their contract by minimizing storage writes and using efficient data structures like mappings and structs.
  • Impact: These optimizations reduced the gas cost for executing multi-signature transactions, making the platform more accessible.

Aug 22, 2024
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Tutorial
solidity

Building a Decentralized Application (DApp) with Smart Contracts

Example Front-End Code:

<!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>

Aug 22, 2024
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