DeveloperNote.com

Getting All Isolated Margin Symbols in PHP:

$api_key = "*****";
$secret = "*****";

$opt = [
    "http" => [
        "method" => "GET",
        "header" => "User-Agent: Mozilla/4.0 (compatible; PHP Binance API)\r\nX-MBX-APIKEY: {$api_key}\r\n"
    ]
];
$context = stream_context_create($opt);
$params['timestamp'] = number_format(microtime(true)*1000,0,'.','');
$query = http_build_query($params, '', '&');
$signature = hash_hmac('sha256', $query, $secret);
$endpoint = "https://api.binance.com/sapi/v1/margin/isolated/allPairs?{$query}&signature={$signature}";

$res = file_get_contents($endpoint, false, $context);
echo $res;

the response is:

[
    {
        "symbol": "ADABTC",
        "base": "ADA",
        "quote": "BTC",
        "isMarginTrade": true,
        "isBuyAllowed": true,
        "isSellAllowed": true
    },
    {
        "symbol": "ADABUSD",
        "base": "ADA",
        "quote": "BUSD",
        "isMarginTrade": true,
        "isBuyAllowed": true,
        "isSellAllowed": true
    },
    ...
]

Getting real-time trades in JavaScript:

const WebSocket = require('ws');

const ws = new WebSocket("wss://stream.binance.com:9443/stream");

ws.on('open', async () =>
{
    const msg =
    {
        method: "SUBSCRIBE",
        params: ["xrpusdt@trade", "ltcusdt@trade"],
        id: 1
    };
    
    ws.send(JSON.stringify(msg));
});

ws.on('message', async message =>
{
    console.log(message);
});

or alternatively

const WebSocket = require('ws');

const ws = new WebSocket("wss://stream.binance.com:9443/stream?streams=btcusdt@trade/ethusdt@trade");

ws.on('message', async message =>
{
    console.log(message);
});

the response is:

{"result":null,"id":1}
{"stream":"xrpusdt@trade","data":{"e":"trade","E":1602256866029,"s":"XRPUSDT","t":73837901,"p":"0.25108000","q":"7383.00000000","b":926377010,"a":926377004,"T":1602256866027,"m":false,"M":true}}
...

Exchange information query in a browser: https://api.binance.com/api/v3/exchangeInfo

{
    "timezone": "UTC",
    "serverTime": 1602329180305,
    "rateLimits": [
        {
            "rateLimitType": "REQUEST_WEIGHT",
            "interval": "MINUTE",
            "intervalNum": 1,
            "limit": 1200
        },
        {
            "rateLimitType": "ORDERS",
            "interval": "SECOND",
            "intervalNum": 10,
            "limit": 100
        },
        {
            "rateLimitType": "ORDERS",
            "interval": "DAY",
            "intervalNum": 1,
            "limit": 200000
        }
    ],
    "exchangeFilters": [],
    "symbols": [
        {
            "symbol": "ETHBTC",
            "status": "TRADING",
            "baseAsset": "ETH",
            "baseAssetPrecision": 8,
            "quoteAsset": "BTC",
            "quotePrecision": 8,
            "quoteAssetPrecision": 8,
            "baseCommissionPrecision": 8,
            "quoteCommissionPrecision": 8,
            "orderTypes": [ "LIMIT", "LIMIT_MAKER", "MARKET", "STOP_LOSS_LIMIT", "TAKE_PROFIT_LIMIT" ],
            "icebergAllowed": true,
            "ocoAllowed": true,
            "quoteOrderQtyMarketAllowed": true,
            "isSpotTradingAllowed": true,
            "isMarginTradingAllowed": true,
            "filters": [
                {
                    "filterType": "PRICE_FILTER",
                    "minPrice": "0.00000100",
                    "maxPrice": "100000.00000000",
                    "tickSize": "0.00000100"
                },
                {
                    "filterType": "PERCENT_PRICE",
                    "multiplierUp": "5",
                    "multiplierDown": "0.2",
                    "avgPriceMins": 5
                },
                {
                    "filterType": "LOT_SIZE",
                    "minQty": "0.00100000",
                    "maxQty": "100000.00000000",
                    "stepSize": "0.00100000"
                },
                {
                    "filterType": "MIN_NOTIONAL",
                    "minNotional": "0.00010000",
                    "applyToMarket": true,
                    "avgPriceMins": 5
                },
                {
                    "filterType": "ICEBERG_PARTS",
                    "limit": 10
                },
                {
                    "filterType": "MARKET_LOT_SIZE",
                    "minQty": "0.00000000",
                    "maxQty": "7479.60184990",
                    "stepSize": "0.00000000"
                },
                {
                    "filterType": "MAX_NUM_ORDERS",
                    "maxNumOrders": 200
                },
                {
                    "filterType": "MAX_NUM_ALGO_ORDERS",
                    "maxNumAlgoOrders": 5
                }
            ],
            "permissions": [ "SPOT", "MARGIN" ]
        },
        ...

Links:

• QMessageAuthenticationCode Class
• CCXT source code
• API Key with https://api.binance.com/api/v1/userDataStream