/** Monetary storage uses nanodollars: 10^7 units per cent, 10^9 per USD.
 * Numbers are accepted only at compatibility boundaries. All arithmetic uses
 * integers; decimal inputs are rounded once, half away from zero. */
export declare const MONEY_SCALE = 10000000n;
export declare const MAX_MONEY_UNITS: bigint;
export type MoneyInput = string | number;
export declare function centsToUnits(value: MoneyInput): bigint;
export declare function usdToUnits(value: MoneyInput): bigint;
export declare function unitsToCents(value: bigint): string;
export declare function normalizeCents(value: MoneyInput): string;
export declare function usdToCents(value: MoneyInput): string;
/** Exact editable USD value; unlike display formatting, this never rounds cents. */
export declare function centsToUsd(value: MoneyInput): string;
/** Approximate legacy/UI value. Never use this conversion for a money decision. */
export declare function centsToNumber(value: MoneyInput): number;
export declare function addCents(...values: MoneyInput[]): string;
export declare function subtractCents(a: MoneyInput, b: MoneyInput): string;
export declare function compareCents(a: MoneyInput, b: MoneyInput): number;
export declare function formatUsdExact(cents: MoneyInput): string;
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