Variable verify

Type Declaration

• • (
        record: TotpRecord,
        presented: unknown,
        opts?: { at?: number; window?: string | number },
    ): VerifyResult

  • Verifies a presented code against an enrolled record, in constant time, across the skew window.

    The digits, period and algorithm come from the record; the window is read live. A code at or below the record's lastCounter is refused as already spent. A refusal carries its error code.

    Parameters

    • record: TotpRecord

      the enrolled TOTP record

    • presented: unknown

      the code as typed (spaces and hyphens ignored)

    • Optionalopts: { at?: number; window?: string | number }

      optional { at, window } to override the moment and window

    Returns VerifyResult

    { ok: true, counter, drift }, or { ok: false, reason, detail } with reason one of shape, store, mismatch or replay