declare module '@gm5/jwt' {
  //
  interface JwtConfig {
    secret: string
    ttl?: number
    level?: number
  }

  interface JwtInstance {
    ttl: number
    sign(data: object, secret: string): string
    verify(token: string, secret: string): object | false
  }

  interface JwtModule {
    name: 'jwt'
    install(conf?: JwtConfig): JwtInstance
  }

  export function createJwt(): JwtModule
}