fix(ws): use !miniTicker@arr for spot prevDay stream

[pcriadoperez]

Summary

• Replaces !ticker@arr with !miniTicker@arr in the spot prevDayStream function

Closes #978

[pcriadoperez]

Test Results

Ran the following script against Spot Testnet to verify the fix:

import Binance from './dist/node-binance-api.js';

const binance = new Binance().options({
    APIKEY: '',
    APISECRET: '',
    test: true, // use testnet
});

const TIMEOUT = 15000;
let received = false;

console.log('Testing prevDay stream (now uses !miniTicker@arr)...');
console.log(`Timeout set to ${TIMEOUT / 1000}s\n`);

const timer = setTimeout(() => {
    if (!received) {
        console.error('FAIL: No data received within timeout');
        process.exit(1);
    }
}, TIMEOUT);

binance.websockets.prevDay(undefined, (error, response) => {
    if (error) {
        console.error('FAIL: Error received:', error);
        clearTimeout(timer);
        process.exit(1);
    }

    if (!received) {
        received = true;
        console.log('SUCCESS: Received data from !miniTicker@arr stream');
        console.log('Symbol:', response.symbol);
        console.log('Fields present:', Object.keys(response).join(', '));

        // These fields should be present from miniTicker
        const expectedFields = ['eventType', 'eventTime', 'symbol', 'close', 'open', 'high', 'low', 'volume', 'quoteVolume'];
        const missing = expectedFields.filter(f => response[f] === undefined);
        if (missing.length) {
            console.error('FAIL: Missing expected fields:', missing.join(', '));
        } else {
            console.log('All expected miniTicker fields present');
        }

        // These fields are NOT available in miniTicker (will be undefined)
        const unavailable = ['priceChange', 'percentChange', 'bestBid', 'bestAsk', 'numTrades'];
        const present = unavailable.filter(f => response[f] !== undefined);
        if (present.length) {
            console.log('Note: Full ticker fields also present:', present.join(', '));
        } else {
            console.log('Confirmed: Full ticker-only fields are undefined (expected with miniTicker)');
        }

        clearTimeout(timer);
        process.exit(0);
    }
});

Output

Testing prevDay stream (now uses !miniTicker@arr)...
Timeout set to 15s

SUCCESS: Received data from !miniTicker@arr stream
Symbol: BTCUSDT
Fields present: eventType, eventTime, symbol, priceChange, percentChange, averagePrice, prevClose, close, closeQty, bestBid, bestBidQty, bestAsk, bestAskQty, open, high, low, volume, quoteVolume, openTime, closeTime, firstTradeId, lastTradeId, numTrades
All expected miniTicker fields present
Confirmed: Full ticker-only fields are undefined (expected with miniTicker)

The stream connects successfully on testnet. All miniTicker fields have values; full-ticker-only fields (priceChange, percentChange, bestBid, bestAsk, numTrades) are undefined as expected since !miniTicker@arr doesn't provide them.