/**
 * Utility namespace for common `bigint` operations.
 *
 * The constructor is private because this class is not meant to be
 * instantiated; all helpers are exposed as static functions.
 */
export declare class BigIntMath {
    private constructor();
    /**
     * Returns the absolute (non-negative) value of a bigint.
     *
     * @param x Input value.
     * @returns `x` when `x` is already non-negative, otherwise `-x`.
     */
    static abs: (x: bigint) => bigint;
    /**
     * Returns the greater of two bigint values.
     *
     * @param a First candidate value.
     * @param b Second candidate value.
     * @returns The larger value between `a` and `b`.
     */
    static max: (a: bigint, b: bigint) => bigint;
    /**
     * Returns the smaller of two bigint values.
     *
     * @param a First candidate value.
     * @param b Second candidate value.
     * @returns The smaller value between `a` and `b`.
     */
    static min: (a: bigint, b: bigint) => bigint;
    /**
     * Returns the negative form of a bigint if it is currently positive.
     *
     * Useful when a value should be represented as an outflow/debit:
     * - positive values become negative
     * - zero and negative values are returned unchanged
     *
     * @param a Input value.
     * @returns A non-positive bigint representation of `a`.
     */
    static neg: (a: bigint) => bigint;
}