Smart Contracts Programming Tutorials, Guides & Best Practices

• Website: NBitcoin

• 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:

Blockchain development is a rapidly growing field with a wide range of tools, libraries, and frameworks available to facilitate the development, testing, and deployment of decentralized applications (DApps) and smart contracts. This cheatsheet provides a comprehensive overview of the most important blockchain development tools, libraries, and frameworks.

• Description: A development framework for Ethereum that provides a suite of tools for writing, testing, and deploying smart contracts.
• Key Features:
• Built-in smart contract compilation, linking, deployment, and binary management.
• Scriptable deployment & migrations framework.
• Network management for deploying to different networks.
• Interactive console for direct contract interaction.
• Testing framework using Mocha and Chai.
• Website: Truffle

• In the contracts directory, create a new file called MyToken.sol:

     touch contracts/MyToken.sol

Solidity supports single inheritance. Contracts can inherit from other contracts.

contract Base {
    uint public data;

    function setData(uint _data) public {
        data = _data;
    }
}

contract Derived is Base {
    function getData() public view returns (uint) {
        return data;
    }
}

• 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: