implement telegram payments

[pou]

Usage

$token = config('telegraph.payments.token');
$currency = config('telegraph.payments.currency');
$orderId = 2;

$invoice = new Invoice();
$invoice->providerToken = $token;
$invoice->currency = $currency;
$invoice->title = 'Title';
$invoice->description = 'Description';
$invoice->payload = json_encode([
    'order_id' => $orderId,
]);

$price = new LabeledPrice();
$price->label = 'Order';
$price->amount = 10000;
$invoice->prices = [
    $price,
];

/** @var TelegraphChat $chat */
$chat = TelegraphChat::find(1);

$chat->invoice($invoice, function (PreCheckoutQuery $data) use ($orderId) {
    $payload = json_decode($data->invoicePayload, false);
    
    return $payload->order_id === $orderId;
})->send();

[fabio-ivona]

Thanks @pou for your contribution

I'll take the time to fully review your work, will update soon!

[fabio-ivona]

Meanwhile, would you mind to fix failing tests?

[fabio-ivona]

no plans for this for now, sorry, I need to tinker with the payment API in order to gain a full understanding of it before accepting a PR for such a sensible feature

[pou]

it's a pity