Smart Contract Anatomy 🏗️
Smart contracts are more than just code; they are self-executing logic that runs exactly as written.
At the very top, we use an SPDX-License-Identifier so tools can identify the legal license, and a pragma to tell the compiler which version to use.
TO REMEMBER
Think of a contract like a class in Java or Python. It is a container for data and logic.
Inside, we store State Variables permanently on the blockchain. Changing these variables updates the contract’s memory, which costs gas.
Solidity has special data types:
uint256: For positive numbers like balances.
address: For wallet or contract locations.
mapping: A key/value store, perfect for associating a wallet with its data.
Almost there! You can also use a Struct to group related data, like a user profile with a name and a wallet address.
Join our Telegram