Has public resolve and fail methods. */ private $resolver; /** @var Promise Hides placeholder methods */ private $promise; public function __construct() { $this->resolver = new class implements Promise { use Internal\Placeholder { resolve as public; fail as public; } }; $this->promise = new Internal\PrivatePromise($this->resolver); } /** * @return Promise */ public function promise(): Promise { return $this->promise; } /** * Fulfill the promise with the given value. * * @param mixed $value * * @psalm-param TValue $value * * @return void */ public function resolve($value = null) { /** @psalm-suppress UndefinedInterfaceMethod */ $this->resolver->resolve($value); } /** * Fails the promise the the given reason. * * @param \Throwable $reason * * @return void */ public function fail(\Throwable $reason) { /** @psalm-suppress UndefinedInterfaceMethod */ $this->resolver->fail($reason); } }