Solidity Programming Tutorials, Guides & Best Practices

• Description: The most popular Ethereum block explorer and analytics platform.
• Key Features:
• Allows users to explore blocks, transactions, and token transfers.
• Provides detailed information on smart contracts and token contracts.
• Offers API services for integrating blockchain data into applications.
• Supports Ethereum mainnet and testnets.
• Website: Etherscan

• Description: A universal blockchain explorer and analytics platform for multiple cryptocurrencies.
• Key Features:
• Supports Ethereum, Bitcoin, and other major blockchains.
• Provides advanced search and analytics features.
• Allows users to explore transactions, addresses, and blocks.
• Offers an API for integrating blockchain data into applications.
• Website: Blockchair

• Open deploy.js and add the following code:

     async function main() {
         const [deployer] = await ethers.getSigners();

         console.log("Deploying contracts with the account:", deployer.address);

         const MyToken = await ethers.getContractFactory("MyToken");
         const myToken = await MyToken.deploy("MyToken", "MTK", ethers.utils.parseUnits("1000000", 18));

         console.log("MyToken deployed to:", myToken.address);
     }

     main()
         .then(() => process.exit(0))
         .catch((error) => {
             console.error(error);
             process.exit(1);
         });

Libraries are similar to contracts but are meant to hold reusable code. They cannot hold state.

library Math {
    function add(uint a, uint b) internal pure returns (uint) {
        return a + b;
    }
}

contract MyContract {
    using Math for uint;

    function calculate(uint a, uint b) public pure returns (uint) {
        return a.add(b);
    }
}

• Remix IDE: Provides real-time gas estimates while writing and testing smart contracts.
• Solidity Coverage: A tool for generating gas reports and identifying expensive operations in your code.
• ETH Gas Station: An online service that provides insights into gas prices and recommended gas limits for transactions.

Example Workflow:

Now that you’ve built a basic DApp, you can explore more complex and real-world use cases. DApps can be used in various domains, including:

• Decentralized Finance (DeFi): Building financial services like lending platforms, exchanges, and stablecoins.
• Gaming: Creating decentralized games where users truly own in-game assets.
• Supply Chain Management: Tracking and verifying the provenance of goods.
• Identity Management: Developing secure and decentralized identity systems.