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How does an ethereum node validate the execution of a contract?

I would like to know how ethereum nodes validate the execution of a smart contract in a transaction. Do they all execute the same transaction to validate that their output is correct? For example, let’s imagine that in a smart contract there is a timestamp validation using block.timestamp, and the node that mines the block::Listen

I would like to know how ethereum nodes validate the execution of a smart contract in a transaction. Do they all execute the same transaction to validate that their output is correct?

For example, let’s imagine that in a smart contract there is a timestamp validation using block.timestamp, and the node that mines the block changes its timestamp to fulfill this validation, when in fact it should not be fulfilled. Do the rest of the nodes execute the transaction and would they realize that this execution is not correct?

Thank you for your answers!

Toss in your job and make $300K working for a DAO? Here’s how

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