Live prices

export async function streamPrices(render: (symbol: string, bid: string, ask: string) => void) {
  const symbols = await trader.symbols.list();
  const names = new Map(symbols.map((s) => [s.id, s.name]));

  const socket = trader.socket();
  socket.on("prices", (prices) => {
    for (const p of prices) render(names.get(p.symbolId) ?? String(p.symbolId), p.bid, p.ask); // exact strings
  });
  await socket.connect();
  socket.watch(symbols.slice(0, 50).map((s) => s.id)); // kept across reconnects
  return () => socket.close();
}

Prices arrive as binary frames; the SDK decodes them into Price objects whose bid, ask and last are exact decimal strings (never floats). Limits: 1000 watched symbols per socket (fewer when the group sets a symbol limit; extra symbols are ignored), 20 messages per second.