chapter23-code-2

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Thu Mar 30 2023 11:34:44 GMT+0000 (Coordinated Universal Time)

Saved by @RareSkills 

contract ExampleContract {
	uint256 public lastCall;

	function hasCooldown() public {
		uint256 day = 60 * 60 * 24;
		require(block.timestamp > lastCall + day, "hasn't been a day");
		lastCall = block.timestamp;
	}
}
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