type ValidatorFn = (input: any, root?: any) => boolean | Promise<boolean>;
declare class Validator {
    private rules;
    private _required;
    private add;
    required(): Validator;
    optional(): Validator;
    string(): Validator;
    number(): Validator;
    boolean(): Validator;
    array(): Validator;
    object(): Validator;
    min(n: number): Validator;
    max(n: number): Validator;
    length(n: number): Validator;
    regex(pattern: RegExp): Validator;
    email(): Validator;
    uuid(): Validator;
    trim(): Validator;
    url(): Validator;
    objectId(): Validator;
    integer(): Validator;
    positive(): Validator;
    negative(): Validator;
    enum<T>(...values: T[]): Validator;
    custom(fn: ValidatorFn): Validator;
    shape(schema: Record<string, ValidatorFn>): Validator;
    minKeys(n: number): Validator;
    maxKeys(n: number): Validator;
    or(...keys: string[]): Validator;
    xor(...keys: string[]): Validator;
    when(key: string, is: any, then: ValidatorFn, otherwise?: ValidatorFn): Validator;
    match(key: string, cases: Record<string, ValidatorFn>, fallback?: ValidatorFn): Validator;
    items(fn: ValidatorFn): Validator;
    minItems(n: number): Validator;
    maxItems(n: number): Validator;
    unique(): Validator;
    build(): (input: any, root?: any) => Promise<boolean>;
}
export declare const validate: {
    string: () => Validator;
    number: () => Validator;
    boolean: () => Validator;
    array: () => Validator;
    object: () => Validator;
    custom: (fn: ValidatorFn) => Validator;
};
export {};