Smart Contracts Programming Tutorials, Guides & Best Practices

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

     import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
     import "@openzeppelin/contracts/access/Ownable.sol";

     contract MyToken is ERC20, Ownable {
         constructor(string memory name, string memory symbol, uint256 initialSupply) ERC20(name, symbol) {
             _mint(msg.sender, initialSupply);
         }

         function mint(address to, uint256 amount) public onlyOwner {
             _mint(to, amount);
         }

         function burn(uint256 amount) public {
             _burn(msg.sender, amount);
         }
     }

• ERC20: Inherits from the OpenZeppelin ERC20 contract, which implements the standard ERC-20 functions and events.
• Ownable: Provides basic authorization control, allowing the contract owner to perform restricted actions.
• Constructor: Initializes the token with a name, symbol, and initial supply, which is minted to the contract creator’s address.
• Mint Function: Allows the contract owner to mint new tokens to a specified address.
• Burn Function: Allows token holders to destroy (burn) their tokens, reducing the total supply.

• Audit and review contracts before deploying to the mainnet.

• Remix IDE: Web-based IDE for writing and testing smart contracts.

• Loops can be costly, especially if they iterate over large datasets. Limit the number of iterations or consider splitting loops into multiple transactions if possible.
• Example: Avoid looping over large arrays or mappings within a single transaction.

4. Use Efficient Data Structures

Steps to Deploy:

• Switch to the "Deploy & Run Transactions" tab.
• Select "Injected Web3" as the environment to connect to MetaMask.
• Choose a test network like Ropsten or Kovan in MetaMask.
• Click "Deploy" and confirm the transaction in MetaMask.