Interfaces

TokenManager

type TokenManager interface {
    Create(claims CustomClaims) (string, error)
    Validate(tokenString string) (Claims, bool, error)
    CreateRefresh(claims CustomClaims) (string, error)
    Refresh(refreshTokenString string) (string, error)
    ValidateInto(tokenString string, claims CustomClaims) (CustomClaims, bool, error)
    RefreshInto(refreshTokenString string, claims CustomClaims) (string, error)
    Revoke(tokenString string) error
    IsRevoked(tokenString string) (bool, error)
    ParseUnverified(tokenString string, claims any) error
    Close() error
    IsClosed() bool
}

Core JWT token operations interface. All implementations must be concurrency-safe. The default implementation is *Processor.

Methods are grouped by responsibility:

• Token Creation: Create, CreateRefresh
• Validation & Refresh: Validate, ValidateInto, Refresh, RefreshInto
• General Operations: Revoke, IsRevoked, ParseUnverified, Close, IsClosed

interface

Methods

Method	Signature	Description
Create	Create(claims CustomClaims) (string, error)	Create access token
Validate	Validate(tokenString string) (Claims, bool, error)	Validate token
CreateRefresh	CreateRefresh(claims CustomClaims) (string, error)	Create refresh token
Refresh	Refresh(refreshTokenString string) (string, error)	Refresh token
ValidateInto	ValidateInto(tokenString string, claims CustomClaims) (CustomClaims, bool, error)	Validate into custom Claims
RefreshInto	RefreshInto(refreshTokenString string, claims CustomClaims) (string, error)	Refresh into custom Claims
Revoke	Revoke(tokenString string) error	Revoke token
IsRevoked	IsRevoked(tokenString string) (bool, error)	Check if revoked
ParseUnverified	ParseUnverified(tokenString string, claims any) error	Parse without verification
Close	Close() error	Release resources
IsClosed	IsClosed() bool	Whether closed

Implementations

Type	Description
*Processor	Default implementation

---

CustomClaims

type CustomClaims interface {
    GetRegisteredClaims() *RegisteredClaims
    Validate() error
}

Custom Claims interface. Used with Create, ValidateInto, RefreshInto and other methods.

interface

Validation Contract

The Processor applies different validation paths for *Claims versus other types:

Type	Validation Behavior
*Claims	Deep validation: all fields (length limits, injection patterns, control characters)
Other types	Calls Validate() + registered claims string sanitization (Issuer, Subject, ID, TokenType, Audience)

Note

For non-*Claims types, custom struct fields are not deep-validated. Implementers must validate all business fields in the Validate() method.

Methods

Method	Signature	Description
GetRegisteredClaims	GetRegisteredClaims() *RegisteredClaims	Returns standard JWT fields
Validate	Validate() error	Custom validation logic

Implementations

Type	Description
*Claims	Built-in Claims implementation

---

BlacklistStore

type BlacklistStore interface {
    Add(tokenID string, expiresAt time.Time) error
    Contains(tokenID string) (bool, error)
    Close() error
}

Blacklist storage backend interface.

interface

Methods

Method	Signature	Description
Add	Add(tokenID string, expiresAt time.Time) error	Add to blacklist
Contains	Contains(tokenID string) (bool, error)	Check if in blacklist
Close	Close() error	Release resources

---

RateLimitProvider

type RateLimitProvider interface {
    Allow(key string) bool
    Reset(key string)
    Close()
}

Rate limiting interface. The Processor calls Allow(key) for a single check during token creation.

About AllowN

The interface itself only defines Allow for single-request checks. The batch method AllowN(key string, n int) bool is an extension method on the concrete type *RateLimiter and is not part of this interface.

interface

Methods

Method	Signature	Description
Allow	Allow(key string) bool	Check if single request is allowed
Reset	Reset(key string)	Reset rate limit state for key
Close	Close()	Release resources

Implementations

Type	Description
*RateLimiter	Built-in token bucket implementation

---

ClockProvider

type ClockProvider interface {
    Now() time.Time
}

Clock interface for time injection (testing scenarios).

interface

Implementations

Type	Description
SystemClock	System clock
FixedClock	Fixed time clock

---

RateLimitKeyer

type RateLimitKeyer interface {
    RateLimitKey() string
}

Optional interface. Custom Claims can implement this to provide a rate limit key. Key lookup priority: Subject → *Claims.UserID → RateLimitKey().

interface