Gas Optimization Development Tutorials, Guides & Insights

• If you want to deploy to a public testnet like Ropsten or Kovan, configure the network in your hardhat.config.js file:

     require("@nomiclabs/hardhat-waffle");

     module.exports = {
         solidity: "0.8.0",
         networks: {
             ropsten: {
                 url: "https://ropsten.infura.io/v3/YOUR_INFURA_PROJECT_ID",
                 accounts: [`0x${YOUR_PRIVATE_KEY}`]
             }
         }
     };

• Limit gas consumption by optimizing functions.

• Write unit tests for every contract function.

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.

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

contract SimpleStorage {
    uint256 public storedData;

    function set(uint256 x) public {
        storedData = x;
    }

    function get() public view returns (uint256) {
        return storedData;
    }
}

Explanation: