Solidity Programming Tutorials, Guides & Best Practices

• 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

• Description: A monitoring and debugging platform for Ethereum smart contracts.
• Key Features:
• Real-time monitoring of smart contracts with detailed analytics.
• Transaction tracing and debugging tools.
• Automated alerting for specific contract events.
• Integration

with development tools like Hardhat and Truffle.

     npx hardhat console --network localhost

• Interact with your contract:

- string: Dynamically-sized UTF-8 encoded string

- bytes: Dynamically-sized byte array

Examples of Gas Costs:

• 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.