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JWTPayload

reference
1 min readUpdated

Kind: Type

Source: src/utils/jwt/types.ts

Part of: Utils

JWT Payload

JWTPayload describes the decoded payload data carried by a JSON Web Token. JWT parsing, validation, and authorization code can use this type to pass token claims through the application with a shared shape.

Definition

ts
{ [key: string]: unknown exp?: number nbf?: number iat?: number iss?: string aud?: string | string[] }

Diagram

mermaid
graph LR
  Token[JWT] -->|decode and validate| Payload[JWTPayload]
  Payload --> Auth[Authorization logic]
  Payload --> Request[Request context]

Usage

ts
import type { JWTPayload } from './utils/jwt/types';

declare function getVerifiedPayload(request: Request): JWTPayload;

function authorizeRequest(request: Request) {
  const payload = getVerifiedPayload(request);

  // Read claims declared by JWTPayload before making access decisions.
  return payload;
}

AI Coding Instructions

  • Import JWTPayload with import type when it is only used for TypeScript checking.
  • Only create a JWTPayload after the JWT has been decoded and validated.
  • Keep claim access aligned with the fields declared in src/utils/jwt/types.ts.
  • Do not treat decoded payload data as trusted until JWT signature and expiry checks have completed.

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