Gas optimization for smart contracts, 1. Reject openzeppelin.

Jul 22, 2023#Ethereum #Web3 #Blockchain #NFT #DeFi #DAO #DApp #区块链 #區塊鏈 #加密货币 #DeGame #链游 #Crypto #比特币 #以太坊 #合约开发104

AI Translation

This post is translated from Chinese into English through AI.View Original

AI-generated summary

If possible, avoid using OpenZeppelin. For example, when writing access control and ownership transfer logic, you can either write your own logic or use OpenZeppelin. The provided code examples demonstrate both approaches. The first code example shows a custom implementation, while the second code example utilizes OpenZeppelin's Ownable contract. The difference in gas cost between the two approaches is approximately 168,235 gas, which translates to an additional cost of around 30+ dollars on the mainnet.

If you can avoid using OpenZeppelin, then don't use OpenZeppelin. For example, write an access control and ownership transfer logic.

Write your own logic:

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

contract test {
    address owner;
    uint256 x;
    constructor() {
        owner = msg.sender;
    }
    modifier onlyOwer() {
        require(msg.sender == owner);
        _;
    }
    function setOwner(address owner_)public onlyOwer{
        owner=owner_;
    }
    function add ()public onlyOwer {
        x=x+1;
    }
}

Use OpenZeppelin:

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "@openzeppelin/contracts/access/Ownable.sol";
contract test is Ownable {
    uint256 x;
    constructor() {}
    function add ()public onlyOwner  {
        x=x+1;
    }
}

You can see a difference of 168,235 gas. If this is on the mainnet, it would cost around more than 30 dollars. You can calculate gas fees on this website: https://www.cryptoneur.xyz/zh/gas-fees-calculator