The Complete Solidity Course - Zero to Advanced for Blockchain and Smart Contracts - Exercise - Error Handling in Solidi

The video tutorial guides viewers through creating a smart contract named 'vendor' with a state variable 'address seller'. It covers implementing a modifier 'only seller' to ensure only the seller can execute certain functions. The tutorial also explains the 'become seller' function to set the seller and a 'sell' function that is payable and checks if the input amount exceeds the message value, reverting with an error if insufficient ether is provided. The video concludes with encouragement to attempt the task and a promise to provide a solution.

What is the significance of using requirements when writing modifiers in the contract?

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Explain how the contract handles insufficient ether provided during a transaction.

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