export type QuantityInput = number | number[];
/**
 * Matches the existing quantity equality tolerance so decimal round-trips can be canonicalized safely.
 */
export declare const QUANTITY_SIMPLIFY_EPSILON = 0.0001;
/**
 * Rounds a quantity to the persisted precision used by pricing records.
 *
 * @param amount The quantity to round.
 * @returns The rounded quantity.
 */
export declare function roundQuantity(amount: number): number;
/**
 * Checks if two quantities are approximately equal.
 *
 * @param firstQuantity The first quantity.
 * @param secondQuantity The second quantity.
 * @returns True when the quantities are within the quantity epsilon.
 */
export declare function sameQuantity(firstQuantity: number, secondQuantity: number): boolean;
/**
 * Gets the denominator of a quantity.
 *
 * @param quantity The quantity to get the denominator of.
 * @returns The denominator of the quantity.
 */
export declare function getQuantityDenominator(quantity: number): number;
/**
 * Sums quantities through Fraction arithmetic and rounds only at the boundary.
 *
 * @param quantities The quantities to sum.
 * @returns The persisted quantity sum.
 */
export declare function sumQuantities(...quantities: QuantityInput[]): number;
/**
 * Calculates the total quantity by summing up the given quantities.
 *
 * @param quantities The quantities to be summed up.
 * @param startQuantity The starting quantity for the calculation.
 * @returns The persisted total quantity.
 */
export declare function calculateTotalQuantity(quantities: number[], startQuantity?: number): number;
/**
 * Multiplies a quantity by a scalar through Fraction arithmetic.
 *
 * @param quantity The quantity to multiply.
 * @param scalar The multiplier.
 * @returns The persisted product.
 */
export declare function multiplyQuantity(quantity: number, scalar: number): number;
/**
 * Divides one quantity-like number by another through Fraction arithmetic.
 *
 * @param numerator The numerator.
 * @param denominator The denominator.
 * @returns The persisted quotient, or zero when the denominator resolves to zero.
 */
export declare function divideQuantity(numerator: number, denominator: number): number;