/**
 * .what = enum of supported round modes for iso-price precision operations
 * .why = explicit round mode selection prevents silent precision loss
 *
 * round modes follow IEEE 754-2008 names for mathematical precision:
 * - `floor` = toward negative infinity
 * - `ceil` = toward positive infinity
 * - `half-up` = ties go away from zero (most common expectation)
 * - `half-down` = ties go toward zero
 * - `half-even` = ties go to nearest even (banker's round)
 */
export declare enum IsoPriceRoundMode {
    /** round toward negative infinity — 5.5 → 5, -5.5 → -6 */
    FLOOR = "floor",
    /** round toward positive infinity — 5.5 → 6, -5.5 → -5 */
    CEIL = "ceil",
    /** ties go away from zero — 5.5 → 6, -5.5 → -6 (most common) */
    HALF_UP = "half-up",
    /** ties go toward zero — 5.5 → 5, -5.5 → -5 */
    HALF_DOWN = "half-down",
    /** ties go to nearest even — 5.5 → 6, 4.5 → 4 (banker's round) */
    HALF_EVEN = "half-even"
}