import type { SchemaValue } from '../schema.js';
import { type ValueConfig } from './value.js';
interface NumberValueConfig extends ValueConfig<number> {
    min?: number;
    max?: number;
}
export declare class NumberValue implements SchemaValue<number> {
    private config;
    private value;
    constructor(config?: NumberValueConfig);
    validate(value: number): string | null;
    get default(): number | undefined;
    get required(): boolean;
}
export declare function isNumberOrUndefined(value: unknown): value is number | undefined;
export declare function isNumber(value: unknown): value is number;
export {};