LimiterPolicy class final

Throttling parameters for an AttemptLimiter (RFC 4226 §7.3).

Three independent rules apply; the longest wait wins:

• window: at most maxAttempts failures per window;
• back-off: after the n-th consecutive failure the next attempt waits min(backoffBase × 2^(n−1), backoffMax);
• lockout: after lockoutAfter consecutive failures the subject is locked until a success or an administrative reset.

Annotations

• @immutable

Constructors

LimiterPolicy({int maxAttempts = 5, Duration window = const Duration(minutes: 5), Duration backoffBase = const Duration(seconds: 1), Duration backoffMax = const Duration(minutes: 15), int lockoutAfter = 20})

Creates a policy; defaults suit 6-digit codes on a server.

const

Properties

backoffBase → Duration

Back-off after the first consecutive failure; zero disables back-off.

final

backoffMax → Duration

Upper bound of the back-off.

final

hashCode → int

The hash code for this object.

no setter, override

lockoutAfter → int

Consecutive failures that trigger the hard lockout; at least maxAttempts.

final

maxAttempts → int

Failures allowed within one window.

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

window → Duration

Length of the counting window, starting at its first failure.

final

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

override

Operators

operator ==(Object other) → bool

The equality operator.

override