UsamaSarwar / flutter-trading-app

Flutter Finance Trading App

Flutter Trading App v1.0.0

🔗 Visit Live Web App

Screenshoots

Tip: You can switch currencies by tapping on the currency Symbols.

Tip: You can change your desired duration. i.e. 1m, 3m or 1d etc.

Tip: You can scroll up and down to zoom-in and zoom-out.

Documentation

Establishing Connection with Binance via Web Sockets

  WebSocketChannel establishConnection(String symbol, String interval) {
    final channel = WebSocketChannel.connect(
      Uri.parse('wss://stream.binance.com:9443/ws'),
    );
    channel.sink.add(
      jsonEncode(
        {
          "method": "SUBSCRIBE",
          "params": ["$symbol@kline_$interval"],
          "id": 1
        },
      ),
    );
    return channel;
  }

API Call for fetching Candles

  Future<List<Candle>> fetchCandles(
      {required String symbol, required String interval, int? endTime}) async {
    final uri = Uri.parse(
        "https://api.binance.com/api/v3/klines?symbol=$symbol&interval=$interval${endTime != null ? "&endTime=$endTime" : ""}");
    final res = await http.get(uri);
    return (jsonDecode(res.body) as List<dynamic>)
        .map((e) => Candle.fromJson(e))
        .toList()
        .reversed
        .toList();
  }

API Calls for fetching Symbols

  Future<List<String>> fetchSymbols() async {
    final uri = Uri.parse("https://api.binance.com/api/v3/ticker/price");
    final res = await http.get(uri);
    return (jsonDecode(res.body) as List<dynamic>)
        .map((e) => e["symbol"] as String)
        .toList();
  }

Dependencies

dependencies:
  # Flutter SDK
  flutter:
    sdk: flutter
  # Dependency for Icons
  cupertino_icons: ^1.0.2
  # Dependency for HTTP Calls
  http: ^0.13.3
  # Dependency for Web Socket Channels
  web_socket_channel: ^2.1.0

Developer

Usama Sarwar