type FieldConstraints = {
    maxlength?: number;
    minlength?: number;
    required?: boolean;
};
type FieldAttrs = FieldConstraints & {
    state?: boolean | null;
};
export declare function useValidator<T extends object>(instance: T): {
    form: T;
    attrs: import("vue").ComputedRef<{ [K in keyof T]?: FieldAttrs | undefined; }>;
    valid: import("vue").ComputedRef<boolean>;
    errors: Record<keyof T, string>;
    validate: () => Promise<boolean>;
};
export {};