The Complete Solidity Course - Zero to Advanced for Blockchain and Smart Contracts - The Restricted Access Pattern

The video tutorial explores the concept of restricted access in Solidity, focusing on using modifiers to control who can modify contract states or call functions. It introduces the 'only by', 'only after', and 'cost' patterns for access control. The tutorial guides viewers through creating a smart contract with public variables and a function to change the owner, emphasizing the importance of restricting access to certain functions using modifiers.

What is the significance of the 'public' keyword in Solidity?

Describe how the 'only after' modifier works.

What is the role of the 'block.timestamp' in a smart contract?