export declare const isValidNumber: (value: unknown) => value is number;
export declare function formatOrdinal(num?: number): string;
export declare function formatNumber(num: number): string;
/**
 * Parse a user-entered money string into a finite number for API payloads.
 *
 * Tolerant of locale decimal separators (e.g. ru-RU "50,75"). Amount inputs
 * (CurrencyInput/ActionMenuItem) strip grouping before emitting, so the value
 * has at most one separator — the decimal one.
 *
 * Guarantees:
 * - Machine format ("50.75") -> 50.75 (identical to `Number(value)`)
 * - Locale comma decimal ("50,75") -> 50.75 (where `Number` would give NaN)
 * - Empty / invalid / NaN / Infinity -> 0 (never returns NaN, so JSON never gets null)
 */
export declare const parseAmount: (value?: string | number | null) => number;
/** Alias of parseAmount for existing call sites. */
export declare const stringToNumber: (value: string) => number;
export declare const numberToString: (value: number, fixed?: number) => string;
export declare function pad(num: number, length?: number): string;
export declare const getAmountPlaceholder: (decimals: number) => string;