/** Round a major-unit amount to 2 decimals (avoids float drift in pricing). */
export declare const roundMoney: (value: number) => number;
/** Major units → integer minor units (dollars → cents). */
export declare const toCents: (value: number) => number;
/** Integer minor units → major units (cents → dollars). */
export declare const fromCents: (cents: number) => number;
/** Format a major-unit amount, USD by default. */
export declare const formatPrice: (value: number, currency?: string) => string;