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Can a User Set the Gas Limit Too High?

Yes, a user can set the gas limit higher than necessary, but this does not increase the cost of a successful transaction. Only the gas actually consumed is paid for.

However, setting it excessively high might unnecessarily increase the required 'Maximum Fee Per Gas' reserve in the user's wallet, potentially locking up funds temporarily.

What Are the Potential Consequences of Setting a TWAP Time Period That Is Too Short or Too Long?
What Is a “Reserve Order” and How Is It Similar to an Iceberg Order?
What Is the Difference between Gas Limit and Gas Price?
What Happens If a Transaction Runs out of Gas?