/home/kueuepay/public_html/vendor/guzzlehttp/promises/src/RejectedPromise.php
<?php

declare(strict_types=1);

namespace GuzzleHttp\Promise;

/**
 * A promise that has been rejected.
 *
 * Thenning off of this promise will invoke the onRejected callback
 * immediately and ignore other callbacks.
 *
 * @final
 */
class RejectedPromise implements PromiseInterface
{
    private $reason;

    /**
     * @param mixed $reason
     */
    public function __construct($reason)
    {
        if (is_object($reason) && method_exists($reason, 'then')) {
            throw new \InvalidArgumentException(
                'You cannot create a RejectedPromise with a promise.'
            );
        }

        $this->reason = $reason;
    }

    public function then(
        callable $onFulfilled = null,
        callable $onRejected = null
    ): PromiseInterface {
        // If there's no onRejected callback then just return self.
        if (!$onRejected) {
            return $this;
        }

        $queue = Utils::queue();
        $reason = $this->reason;
        $p = new Promise([$queue, 'run']);
        $queue->add(static function () use ($p, $reason, $onRejected): void {
            if (Is::pending($p)) {
                try {
                    // Return a resolved promise if onRejected does not throw.
                    $p->resolve($onRejected($reason));
                } catch (\Throwable $e) {
                    // onRejected threw, so return a rejected promise.
                    $p->reject($e);
                }
            }
        });

        return $p;
    }

    public function otherwise(callable $onRejected): PromiseInterface
    {
        return $this->then(null, $onRejected);
    }

    public function wait(bool $unwrap = true)
    {
        if ($unwrap) {
            throw Create::exceptionFor($this->reason);
        }

        return null;
    }

    public function getState(): string
    {
        return self::REJECTED;
    }

    public function resolve($value): void
    {
        throw new \LogicException('Cannot resolve a rejected promise');
    }

    public function reject($reason): void
    {
        if ($reason !== $this->reason) {
            throw new \LogicException('Cannot reject a rejected promise');
        }
    }

    public function cancel(): void
    {
        // pass
    }
}
Path: home/kueuepay/public_html/vendor/guzzlehttp/promises/src
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Best Practices

To ensure a smooth integration process and optimal performance, follow these best practices:

  1. Use secure HTTPS connections for all API requests.
  2. Implement robust error handling to handle potential issues gracefully.
  3. Regularly update your integration to stay current with any API changes or enhancements.
Error Handling Examples