Stream de PNL da Calculadora

/v1/calculators/stream

curl --location --no-buffer \
  -H "Accept: text/event-stream" \
  -H "Cache-Control: no-cache" \
  'localhost:8080/v1/calculators/stream?email=user@example.com&ticker=BTC-USDT&exchange=binance'

const params = new URLSearchParams({
    email: 'user@example.com',
    ticker: 'BTC-USDT',
    exchange: 'binance'
});

const source = new EventSource(`/v1/calculators/stream?${params}`);

source.onmessage = (event) => {
    const pnl = JSON.parse(event.data);
    console.log(`PNL: $${pnl.pnl.toFixed(2)} (${pnl.pnlPercentage.toFixed(2)}%) - Lucrativo: ${pnl.isProfitable}`);
};

source.onerror = () => {
    // EventSource reconecta automaticamente
};

// Ao desmontar:
// source.close();

data: {"email":"user@example.com","ticker":"BTC-USDT","exchange":"binance","entrySpotValue":83000,"entryShortValue":83150,...,"pnl":42.50,"pnlPercentage":0.026,"isProfitable":true}

data: {"email":"user@example.com","ticker":"BTC-USDT","exchange":"binance","entrySpotValue":83000,"entryShortValue":83150,...,"pnl":51.30,"pnlPercentage":0.031,"isProfitable":true}

{
  "email": "user@example.com",
  "ticker": "BTC-USDT",
  "exchange": "binance",
  "entrySpotValue": 83000.00,
  "entryShortValue": 83150.00,
  "entrySpotQty": 0.1,
  "entryFuturesQty": 0.1,
  "entrySpread": 150.00,
  "entrySpreadPercentage": 0.18,
  "currentSpotPrice": 85400.00,
  "currentFuturePrice": 85450.00,
  "currentSpread": 50.00,
  "currentSpreadPercentage": 0.058,
  "fundingRate": 0.0001,
  "pnl": 42.50,
  "pnlPercentage": 0.026,
  "isProfitable": true
}

spotValueChange    = (currentSpotPrice − entrySpotValue) × entrySpotQty
futureValueChange  = (entryShortValue − currentFuturePrice) × entryFuturesQty
PNL                = spotValueChange + futureValueChange

entryTotalValue    = (entrySpotValue × entrySpotQty) + (entryShortValue × entryFuturesQty)
PNLPercentage      = (PNL / entryTotalValue) × 100

import { useCalculatorStream } from 'src/hooks/useCalculatorStream';

function CalculatorPage({ ticker }) {
    const { user } = useAuth();
    const [entryData, setEntryData] = useState(null);
    const [exitOpen, setExitOpen] = useState(true);

    // Stream só é aberto quando a posição está salva e "exitOpen" está ativo
    const streamActive = exitOpen && !!entryData && !!user?.email;
    const { result: processData, connected } = useCalculatorStream(
        user?.email,
        ticker,
        'binance',
        streamActive
    );

    return (
        <div>
            <span>{connected ? '🟢 Live' : '⚪ Aguardando'}</span>
            {processData && (
                <div style={{ color: processData.isProfitable ? 'green' : 'red' }}>
                    PNL: ${processData.pnl?.toFixed(2)} ({processData.pnlPercentage?.toFixed(2)}%)
                </div>
            )}
        </div>
    );
}