Smart Contracts Programming Tutorials, Guides & Best Practices

• 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

• Description: An open-source blockchain explorer for Ethereum-based networks.
• Key Features:
• Provides a user-friendly interface for exploring blocks, transactions, and tokens.
• Supports custom networks and sidechains.
• Allows token holders to track token balances and transaction histories.
• Easy to deploy and customize.
• Website: BlockScout

• Description: A decentralized oracle network that provides real-world data to smart contracts.
• Key Features:
• Fetches data from APIs and off-chain sources for use in smart contracts.
• Secure and reliable, with decentralization to avoid single points of failure.
• Supports various data types including price feeds, weather data, and more.
• Integrates easily with Ethereum smart contracts.
• Website: Chainlink

• Open deploy.js and add the following code:

     async function main() {
         const [deployer] = await ethers.getSigners();

         console.log("Deploying contracts with the account:", deployer.address);

         const MyToken = await ethers.getContractFactory("MyToken");
         const myToken = await MyToken.deploy("MyToken", "MTK", ethers.utils.parseUnits("1000000", 18));

         console.log("MyToken deployed to:", myToken.address);
     }

     main()
         .then(() => process.exit(0))
         .catch((error) => {
             console.error(error);
             process.exit(1);
         });

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

contract ContractName {
    // State variables
    uint public myUint;
    string public myString;

    // Constructor
    constructor() {
        // Initialization code
    }

    // Functions
    function setMyUint(uint _value) public {
        myUint = _value;
    }

    function getMyUint() public view returns (uint) {
        return myUint;
    }
}

• Value Types:

Why Gas Matters:

• Prevents Abuse: By charging for computational resources, Ethereum discourages spam and abuse on the network.
• Incentivizes Efficiency: Developers are motivated to write optimized code to minimize gas costs.