UOtp class abstract

Offline one-time codes tied to a POS serial and today's date (Verhoeff checksums), for terminals without internet. final code = UOtp.generateOtp(serial, 8);

Constructors

UOtp()

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Static Methods

generateAdminOtp(String posSerial, int length) → String

New admin code that validates against the serial alone.

generateOtp(String posSerial, int length) → String

New code for posSerial; length includes 3 check digits (min 4). UOtp.generateOtp("POS1234", 8)

generateVerhoeff(String num) → String

Verhoeff check digit of a digit string. UOtp.generateVerhoeff("236") → "3"

verifyAdminOtp(String posSerial, String otp) → bool

True when an admin code is valid today for posSerial.

verifyOtp(String posSerial, String otp) → bool

True when otp was generated today for posSerial. UOtp.verifyOtp(serial, input)