无法使用PHP创建Bitmex签名身份验证密钥

Question

我正在使用Laravel框架和棘轮将Bitmex Websocket API与棘轮连接。问题是我无法创建用于在Bitmex Websocket服务器上进行身份验证的“签名” ...

我使用此code在Bitmex上进行连接，但该连接始终返回{"error":"Signature not valid."}

我不确定自己在做什么错...也许某些哈希函数不正确或其他...我试图在Internet上搜索，但没有找到任何可靠的解决方案。你们能告诉我我做错了吗？

public function positions($callback){
    //this->env is "wss://testnet.bitmex.com/realtime";
    $expires = strtotime('+60 minute');
    $loop = Factory::create();
    $react = new \React\Socket\Connector($loop);
    $connector = new Connector($loop, $react);
    $endpoint = 'position';
    $signature = bin2hex(hash_hmac('sha256', 'GET/realtime'  . $expires, $this->secret));
    $apiEndPoint = $this->env . "?api-expires=$expires&api-signature=$signature&api-key=$this->apiKey";
    $connector($apiEndPoint)->then(function ($ws) use ($callback, $loop, $endpoint) {
        //
        $ws->on('message', function ($data) use ($ws, $loop, $callback, $endpoint) {
            $socketData = json_decode($data, true);
            dd($socketData);
            if (!array_key_exists("info", $socketData)){
                dd($socketData);
            }


        });
        $ws->on('close', function ($code = null, $reason = null) use ($loop) {
            echo "WebSocket Connection closed! ({$code} - {$reason})" . PHP_EOL;
            $loop->stop();
        });
    }, function ($e) use ($loop) {
        echo "Could not connect: {$e->getMessage()}" . PHP_EOL;
        $loop->stop();
    });
    $loop->run();
}