Solidity Programming Tutorials, Guides & Best Practices

Writing gas-efficient smart contracts is a balance between functionality, security, and cost. Here are some best practices to follow:

• Avoid Storage in Loops: Writing to storage inside loops can quickly escalate gas costs. If you must use a loop, limit its execution or use memory instead of storage.
• Use Events for Logging: Instead of storing logs on-chain, use Solidity events. Events are cheaper and can be accessed off-chain by listening to logs.
• Optimize for Minimal Execution Paths: Design your smart contract functions to have the most common execution path consume the least gas.
• Leverage immutable and constant Keywords: For variables that won’t change after deployment, use immutable or constant to save on gas.
• Consider Upgradable Contracts: For complex contracts that may require changes over time, consider using upgradable contracts to avoid redeployment costs.

• Decentralized: Operates on a blockchain network.
• Open-source: The code is public and available for anyone to view and audit.
• Autonomous: Once deployed, it runs independently without human intervention.
• Smart Contract Integration: Relies on smart contracts to execute transactions and operations.

Before you start building your DApp, you’ll need to set up your development environment. Here’s what you need:

• Set a Value: Use the set function to store a number in the contract.
• Get the Value: Use the get function to retrieve the stored number.

You’ll notice that calling the set function will require gas (a small amount of Ether) to execute, whereas calling the get function is free as it’s a view function.