otplib API Documentation / @otplib/hotp / HOTPVerifyOptions

Type Alias: HOTPVerifyOptions

HOTPVerifyOptions = HOTPGenerateOptions & object

Defined in: hotp/src/types.ts:71

Required options for HOTP verification

Requires secret, counter, token, and crypto for verification.

Type Declaration

counterTolerance?

readonly optional counterTolerance: number | [number, number]

Counter tolerance for verification (default: 0)

• Number: creates look-ahead only tolerance [0, n] (secure default per RFC 4226)
• Tuple [past, future]: explicit window control Examples: [0, 5] allows 5 future counters; [5, 5] allows ±5 symmetric

token

readonly token: string

The OTP token to verify