The Complete Solidity Course - Zero to Advanced for Blockchain and Smart Contracts - Exercise - Cost Restriction in Soli

The video tutorial guides viewers through an exercise involving the creation of a modifier called 'costs' and a function named 'force owner change' in a smart contract. The modifier ensures that a specified amount of Ether is provided before executing the function, which changes the contract owner. The tutorial emphasizes the importance of using the modifier to enforce this condition and concludes with a mention of a challenging bonus task.

Describe the role of Ether in the context of the exercise.

What is the overall goal of the exercise as described in the text?