import BN from 'bn.js';
/**
 * Exponent for calculating how many indivisible units are there in one NEAR. See {@link NEAR_NOMINATION}.
 */
export declare const NEAR_NOMINATION_EXP = 24;
/**
 * Number of indivisible units in one NEAR. Derived from {@link NEAR_NOMINATION_EXP}.
 */
export declare const NEAR_NOMINATION: BN;
/**
 * Convert account balance value from internal indivisible units to NEAR. 1 NEAR is defined by {@link NEAR_NOMINATION}.
 * Effectively this divides given amount by {@link NEAR_NOMINATION}.
 *
 * @param balance decimal string representing balance in smallest non-divisible NEAR units (as specified by {@link NEAR_NOMINATION})
 * @param fracDigits number of fractional digits to preserve in formatted string. Balance is rounded to match given number of digits.
 */
export declare function formatNearAmount(balance: string, fracDigits?: number): string;
/**
 * Convert human readable NEAR amount to internal indivisible units.
 * Effectively this multiplies given amount by {@link NEAR_NOMINATION}.
 *
 * @param amt decimal string (potentially fractional) denominated in NEAR.
 */
export declare function parseNearAmount(amt?: string): string | null;