Http/Guzzle async websocket request

test-async-guzzle.php

<?php

$handlerStack = new HandlerStack(new StreamHandler());
$handlerStack->push(new WebSocketMiddleware());

$guzzle = new Client(['handler' => $handlerStack]);

// Execute async call
// TODO: research what we can do with this payload array
$payload = [];
/** @var Response $handshakeResponse */
// https://docs.guzzlephp.org/en/stable/quickstart.html#async-requests
$relay1HandshakeResponse = $guzzle->requestAsync('GET', 'wss://welcome.nostr.wine', $payload)->wait();

/** @var \Valtzu\WebSocketMiddleware\WebSocketStream $ws */
$ws = $relay1HandshakeResponse->getBody();
$reqMsg = populateRequestMessage();
$py = $reqMsg->generate();
$ws->write($py);
do {
    $response = $ws->read();
} while ($response === '');
$result = json_decode($response, false);
$relayResponse = RelayResponse::create($result);
$ws->close();