verifyTOTPWithGracePeriod()

Verifies a TOTP using verifyTOTP() with a grace period. If the grace period is 30 seconds for example, the OTP is valid if it was generated within the 30-second time span before or after the current machine time (60 seconds in total).

function verifyTOTPWithGracePeriod(
	key: Uint8Array,
	intervalInSeconds: number,
	digits: number,
	otp: string,
	gracePeriodInSeconds: number
): boolean;

Parameters

• key: HMAC key
• intervalInSeconds
• digits
• otp
• gracePeriodInSeconds