Method roundStep

src/node-binance-api.ts:3571–3578

* rounds number with given step * @param {float} qty - quantity to round * @param {float} stepSize - stepSize as specified by exchangeInfo * @return {float} - number

(qty, stepSize)

    * @return {float} - number
    */
    roundStep(qty, stepSize) {
        // Integers do not require rounding
        if (Number.isInteger(qty)) return qty;
        const qtyString = parseFloat(qty).toFixed(16);
        const desiredDecimals = Math.max(stepSize.indexOf('1') - 1, 0);
        const decimalIndex = qtyString.indexOf('.');
        return parseFloat(qtyString.slice(0, decimalIndex + desiredDecimals + 1));
    }

    /**
    * rounds price to required precision