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Blockchain Libraries Cheatsheet

solidity
#Web3.js #IPFS #OpenZeppelin #blockchain libraries #Ethers.js #BitcoinJS #web3.py #Bitcore #PyCryptodome #Geth #bcoin #CryptoJS #NBitcoin #Blockstack #web3j #Libsodium

This cheatsheet focuses exclusively on essential blockchain libraries that can be integrated into various development projects. These libraries provide functionality for interacting with blockchains, handling data, and implementing security, making them crucial for any blockchain-based application.

1. Web3.js

  • Description: A JavaScript library that enables developers to interact with the Ethereum blockchain using HTTP, WebSocket, or IPC.
  • Use Cases:
  • Interact with smart contracts.
  • Send transactions and interact with the Ethereum network.
  • Handle accounts, wallets, and keys.
  • Monitor events emitted by smart contracts.
  • Key Features:
  • Supports all major Ethereum network interactions.
  • Comprehensive set of utilities for Ethereum development.
  • Wide adoption with extensive documentation.
  • Installation:
  npm install web3

2. Ethers.js

  • Description: A lightweight and fully featured library for interacting with the Ethereum blockchain.
  • Use Cases:
  • Interact with smart contracts and wallets.
  • Create and manage Ethereum addresses.
  • Sign transactions and data.
  • Query the Ethereum blockchain and perform low-level operations.
  • Key Features:
  • Modular design with a smaller bundle size compared to Web3.js.
  • Built-in support for ENS (Ethereum Name Service).
  • Simplified API for common Ethereum tasks.
  • Installation:
  npm install ethers

3. OpenZeppelin Contracts

  • Description: A library of reusable and secure smart contract components, adhering to the latest Ethereum standards.
  • Use Cases:
  • Implement ERC-20, ERC-721, and ERC-1155 tokens.
  • Use access control patterns like Ownable and Role-Based Access Control.
  • Implement secure and efficient upgradeable contracts.
  • Manage governance, staking, and more with pre-built modules.
  • Key Features:
  • Security-focused implementations.
  • Regular updates following best practices.
  • Easy integration with any Solidity project.
  • Installation:
  npm install @openzeppelin/contracts

4. BitcoinJS

  • Description: A JavaScript library for Bitcoin-related operations, including creating and signing transactions, and managing addresses.
  • Use Cases:
  • Create Bitcoin wallets and addresses.
  • Sign and broadcast Bitcoin transactions.
  • Build Bitcoin-based applications with custom scripts.
  • Key Features:
  • Lightweight and easy to use.
  • Supports SegWit (Segregated Witness) transactions.
  • Comprehensive documentation for various Bitcoin operations.
  • Installation:
  npm install bitcoinjs-lib

5. IPFS (JavaScript Implementation)

  • Description: A JavaScript implementation of the InterPlanetary File System (IPFS) protocol, allowing decentralized storage and sharing of files.
  • Use Cases:
  • Decentralized file storage for DApps.
  • Sharing large datasets or media files across a decentralized network.
  • Storing off-chain data for blockchain applications.
  • Key Features:
  • Easy integration with web applications.
  • Supports file uploads, retrievals, and pinning.
  • Works well with both browser and Node.js environments.
  • Installation:
  npm install ipfs

6. web3.py

  • Description: A Python library for interacting with Ethereum, similar to Web3.js but designed for Python developers.
  • Use Cases:
  • Interact with Ethereum nodes from Python applications.
  • Deploy and interact with smart contracts using Python.
  • Query blockchain data and send transactions.
  • Key Features:
  • Supports all major Ethereum interactions.
  • Compatible with popular Python frameworks.
  • Extensive documentation and active community support.
  • Installation:
  pip install web3

7. Bitcore

  • Description: A powerful and feature-rich library for Bitcoin and blockchain-related applications, built by the developers behind BitPay.
  • Use Cases:
  • Create Bitcoin wallets and manage keys.
  • Develop custom Bitcoin transaction scripts.
  • Build and query Bitcoin blockchain services.
  • Key Features:
  • Comprehensive support for Bitcoin development.
  • Provides tools for both full-node and SPV (Simplified Payment Verification) implementations.
  • Includes utilities for working with Bitcoin cash and other forks.
  • Installation:
  npm install bitcore-lib

8. PyCryptodome

  • Description: A self-contained Python library of low-level cryptographic primitives used in many blockchain applications.
  • Use Cases:
  • Implement custom cryptographic operations in blockchain projects.
  • Manage secure cryptographic keys and sign data.
  • Encrypt and decrypt data in blockchain-based systems.
  • Key Features:
  • Wide range of cryptographic algorithms and primitives.
  • Pure Python implementation, with optional C extensions for performance.
  • Highly secure and suitable for production use.
  • Installation:
  pip install pycryptodome

9. Geth (Go-Ethereum)

  • Description: The official Go implementation of the Ethereum protocol, used to run full Ethereum nodes and interact with the network.
  • Use Cases:
  • Run a full Ethereum node to participate in the network.
  • Develop Ethereum-based applications with Go.
  • Use as a backend for DApps requiring direct blockchain interaction.
  • Key Features:
  • Full support for Ethereum protocol and consensus algorithms.
  • Provides JSON-RPC API for interacting with the Ethereum network.
  • Includes tools for mining, managing accounts, and more.
  • Installation:
  go get -v github.com/ethereum/go-ethereum

10. bcoin

  • Description: A full-featured, open-source Bitcoin library for Node.js that allows you to build Bitcoin applications with ease.
  • Use Cases:
  • Build Bitcoin wallets and full-node implementations.
  • Integrate Bitcoin functionality into existing Node.js applications.
  • Develop custom Bitcoin transaction handling and mining scripts.
  • Key Features:
  • Full SPV and full-node support for Bitcoin.
  • Modular architecture for building custom Bitcoin services.
  • Detailed documentation and active community support.
  • Installation:
  npm install bcoin

11. CryptoJS

  • Description: A JavaScript library providing standard and secure cryptographic algorithms for building blockchain applications.
  • Use Cases:
  • Encrypt and decrypt data in JavaScript applications.
  • Generate cryptographic hashes (e.g., SHA-256, SHA-512).
  • Implement secure random number generation and key derivation.
  • Key Features:
  • Wide range of cryptographic functions.
  • Lightweight and easy to integrate into any JavaScript project.
  • Supports multiple cryptographic algorithms.
  • Installation:
  npm install crypto-js

12. NBitcoin

  • Description: A comprehensive Bitcoin library for .NET, designed for developing Bitcoin applications with C#.
  • Use Cases:
  • Develop Bitcoin wallets and applications in C#.
  • Handle Bitcoin transactions and blocks programmatically.
  • Build and deploy full-featured Bitcoin services on .NET.
  • Key Features:
  • Full support for Bitcoin protocol and SegWit.
  • Compatible with various .NET environments.
  • Detailed examples and documentation for easy integration.
  • Installation:
  Install-Package NBitcoin

13. Blockstack

  • Description: A decentralized computing network and app ecosystem designed to build decentralized applications on top of blockchains.
  • Use Cases:
  • Build decentralized applications with identity, storage, and smart contracts.
  • Use Gaia storage for decentralized file storage.
  • Implement user authentication and identity management in DApps.
  • Key Features:
  • Provides SDKs for JavaScript, iOS, and Android.
  • Integrates easily with existing blockchains and decentralized storage solutions.
  • Focused on privacy and user data ownership.
  • Installation:
  npm install @stacks/blockchain-api-client

14. web3j

  • Description: A lightweight, highly modular,

and reactive Java and Android library for working with smart contracts and integrating with Ethereum nodes.

  • Use Cases:
  • Build Ethereum-based applications in Java and Android.
  • Interact with smart contracts and Ethereum nodes.
  • Send transactions, query blockchain data, and manage Ethereum accounts.
  • Key Features:
  • Full support for Ethereum JSON-RPC.
  • Asynchronous and synchronous execution of requests.
  • Built-in support for Solidity smart contract wrappers.
  • Installation:
  <dependency>
    <groupId>org.web3j</groupId>
    <artifactId>core</artifactId>
    <version>4.8.7</version>
  </dependency>

15. Libsodium

  • Description: A modern, portable, easy-to-use cryptographic library that provides secure and fast cryptographic functions.
  • Use Cases:
  • Implement secure cryptographic operations in blockchain applications.
  • Encrypt, sign, and verify messages and transactions.
  • Perform secure random number generation and key derivation.
  • Key Features:
  • Comprehensive support for cryptographic algorithms.
  • Portable and optimized for performance.
  • Extensive documentation and active development.
  • Installation:
  brew install libsodium

This cheatsheet highlights essential blockchain libraries that are crucial for developing secure, efficient, and feature-rich blockchain applications. Whether you're working on Ethereum, Bitcoin, or other blockchain platforms, these libraries provide the tools needed to interact with blockchains, manage cryptographic operations, and build decentralized applications.

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How to Query ERC-20 Token Balances and Transactions Using Ethers.js and Etherscan API 

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

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const privateKey = 'YOUR_PRIVATE_KEY';

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const bytecode = '0xYourContractBytecode';
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    try {
        // Create a ContractFactory to deploy the contract
        const factory = new ethers.ContractFactory(abi, bytecode, wallet);

        // Deploy the contract
        const contract = await factory.deploy();

        // Wait for the contract to be mined
        console.log('Contract deployed at address:', contract.address);
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        console.error('Error deploying contract:', error);
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}

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deployContract();

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                 url: "https://ropsten.infura.io/v3/YOUR_INFURA_PROJECT_ID",
                 accounts: [`0x${YOUR_PRIVATE_KEY}`]
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Prerequisites

  • Node.js and npm installed on your system.
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Tracking Newly Created Tokens on Solana

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Tracking Newly Created Tokens on Ethereum

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const axios = require('axios');

// Replace with your Etherscan API key
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async function getNewTokens() {
  try {
    const url = `https://api.etherscan.io/api?module=account&action=tokentx&address=0x0&startblock=0&endblock=99999999&sort=asc&apikey=${ETHERSCAN_API_KEY}`;
    const response = await axios.get(url);

    if (response.data.status === '1') {
      const transactions = response.data.result;
      const newTokens = transactions.filter(tx => tx.tokenSymbol && tx.tokenName && tx.from === '0x0000000000000000000000000000000000000000');

      console.log('Newly Created Tokens:');
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        console.log(`- Token Name: ${token.tokenName}`);
        console.log(`  Token Symbol: ${token.tokenSymbol}`);
        console.log(`  Token Contract Address: ${token.contractAddress}`);
      });
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    console.error('Error:', error);
  }
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getNewTokens();

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