<?php

$botToken = ''; 

$apiURL = "https://api.telegram.org/bot" . $botToken;

$productTitle = "Звезда";

$productDescription = "Тестовый товар - 1 звезда";

$productPayload = "star_1"; 

$productPrice = 1; 

$currency = 'XTR'; // Валюта

$providerToken = ""; 

function telegramRequest($method, $params = []) {

    global $apiURL;

    $url = $apiURL . "/" . $method;    

    if(!empty($params)){

       $url .= '?' . http_build_query($params);

    }    

    $response = file_get_contents($url);

    return json_decode($response, true);

}

function sendMessage($chatId, $text, $replyMarkup = null) {

    $params = [

        'chat_id' => $chatId,

        'text' => $text,

        'parse_mode' => 'HTML'

    ];

    if($replyMarkup) {

        $params['reply_markup'] = json_encode($replyMarkup);

    }

telegramRequest('sendMessage', $params);

}

function createInvoice($chatId) {

     global $productTitle, $productDescription, $productPayload, $productPrice, $currency, $providerToken;

    $prices = [

        ['label' => '1 звезда', 'amount' => $productPrice]

    ];

    $params = [

        'chat_id' => $chatId,

        'title' => $productTitle,

        'description' => $productDescription,

        'payload' => $productPayload,

        'provider_token' => $providerToken,

        'currency' => $currency,

        'photo_url' => "https://img.freepik.com/free-photo/holographic-reminder-with-star-shape-washi-tape_53876-137585.jpg",

      'photo_width' => 3600,

        'photo_height' => 2338,

        'photo_size' => 262000,

        'is_flexible' => false,

        'prices' => json_encode($prices),

        'start_parameter' => "one-star"

    ];



    return telegramRequest('sendInvoice', $params);

}

function answerPreCheckoutQuery($preCheckoutQueryId, $ok = true, $errorMessage = null) {

     $params = [

        'pre_checkout_query_id' => $preCheckoutQueryId,

        'ok' => $ok ? true : false,

     ];

    if($errorMessage) {

        $params['error_message'] = $errorMessage;

    }

telegramRequest('answerPreCheckoutQuery', $params);



}

$update = json_decode(file_get_contents('php://input'), true);

if (isset($update['message'])) {

    $message = $update['message'];

    $chatId = $message['chat']['id'];

    $text = $message['text'] ?? '';

    if ($text === '/start') {

      $keyboard = [

            'inline_keyboard' => [

                [

                    ['text' => 'Купить 1 звезду ⭐', 'callback_data' => 'buy_star'],

                ]

            ]

      ];

        sendMessage($chatId, 'Привет! Нажми кнопку для покупки 1 звезды.', $keyboard);

    }

} elseif (isset($update['callback_query'])) {

   $callbackQuery = $update['callback_query'];

   $chatId = $callbackQuery['message']['chat']['id'];

   $data = $callbackQuery['data'];

   if($data === 'buy_star') {

        createInvoice($chatId);

   }   telegramRequest('answerCallbackQuery', ['callback_query_id' => $callbackQuery['id']]);

} elseif(isset($update['pre_checkout_query'])) {

    $preCheckoutQuery = $update['pre_checkout_query'];

    $preCheckoutQueryId = $preCheckoutQuery['id'];

    $payload = $preCheckoutQuery['payload'];

    if ($payload === $productPayload) {        answerPreCheckoutQuery($preCheckoutQueryId);

    } else {     answerPreCheckoutQuery($preCheckoutQueryId, false, "Некорректный payload");

    }

} elseif (isset($update['message']['successful_payment'])) {

   $successfulPayment = $update['message']['successful_payment'];

   $chatId = $update['message']['chat']['id'];

   $payload = $successfulPayment['invoice_payload'];

   $telegramPaymentChargeId = $successfulPayment['telegram_payment_charge_id'];

   if($payload === $productPayload) {

     sendMessage($chatId, "Спасибо за покупку звезды!\nId транзакции: ".$telegramPaymentChargeId);

    } else {

      sendMessage($chatId, "Ошибка! Неизвестный payload");

    }

}

?>