/home/kueuepay/public_html/vendor/guzzlehttp/psr7/src/BufferStream.php
<?php

declare(strict_types=1);

namespace GuzzleHttp\Psr7;

use Psr\Http\Message\StreamInterface;

/**
 * Provides a buffer stream that can be written to to fill a buffer, and read
 * from to remove bytes from the buffer.
 *
 * This stream returns a "hwm" metadata value that tells upstream consumers
 * what the configured high water mark of the stream is, or the maximum
 * preferred size of the buffer.
 */
final class BufferStream implements StreamInterface
{
    /** @var int */
    private $hwm;

    /** @var string */
    private $buffer = '';

    /**
     * @param int $hwm High water mark, representing the preferred maximum
     *                 buffer size. If the size of the buffer exceeds the high
     *                 water mark, then calls to write will continue to succeed
     *                 but will return 0 to inform writers to slow down
     *                 until the buffer has been drained by reading from it.
     */
    public function __construct(int $hwm = 16384)
    {
        $this->hwm = $hwm;
    }

    public function __toString(): string
    {
        return $this->getContents();
    }

    public function getContents(): string
    {
        $buffer = $this->buffer;
        $this->buffer = '';

        return $buffer;
    }

    public function close(): void
    {
        $this->buffer = '';
    }

    public function detach()
    {
        $this->close();

        return null;
    }

    public function getSize(): ?int
    {
        return strlen($this->buffer);
    }

    public function isReadable(): bool
    {
        return true;
    }

    public function isWritable(): bool
    {
        return true;
    }

    public function isSeekable(): bool
    {
        return false;
    }

    public function rewind(): void
    {
        $this->seek(0);
    }

    public function seek($offset, $whence = SEEK_SET): void
    {
        throw new \RuntimeException('Cannot seek a BufferStream');
    }

    public function eof(): bool
    {
        return strlen($this->buffer) === 0;
    }

    public function tell(): int
    {
        throw new \RuntimeException('Cannot determine the position of a BufferStream');
    }

    /**
     * Reads data from the buffer.
     */
    public function read($length): string
    {
        $currentLength = strlen($this->buffer);

        if ($length >= $currentLength) {
            // No need to slice the buffer because we don't have enough data.
            $result = $this->buffer;
            $this->buffer = '';
        } else {
            // Slice up the result to provide a subset of the buffer.
            $result = substr($this->buffer, 0, $length);
            $this->buffer = substr($this->buffer, $length);
        }

        return $result;
    }

    /**
     * Writes data to the buffer.
     */
    public function write($string): int
    {
        $this->buffer .= $string;

        if (strlen($this->buffer) >= $this->hwm) {
            return 0;
        }

        return strlen($string);
    }

    /**
     * @return mixed
     */
    public function getMetadata($key = null)
    {
        if ($key === 'hwm') {
            return $this->hwm;
        }

        return $key ? null : [];
    }
}
Path: home/kueuepay/public_html/vendor/guzzlehttp/psr7/src
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Kueue Pay Payment Gateway Solutions Developer API Documentation

Welcome to the Kueue Pay Payment Gateway Solutions Developer API Documentation. This comprehensive guide will empower you to seamlessly integrate our advanced payment gateway into your website, enhancing your customers’ payment experience and enabling efficient transaction processing. The Kueue Pay Developer API is designed for developers and entrepreneurs who seek simplicity, security, and reliability in their payment processing solutions.

1. Introduction

The Kueue Pay Developer API allows you to seamlessly integrate Kueue Pay’s Payment Gateway Solutions into your website, enabling secure and efficient debit and credit card transactions. With our API, you can initiate payments, check payment statuses, and even process refunds, all while ensuring a smooth and streamlined payment experience for your customers.

Prerequisites