import { Resource } from './resource.model';
import { epochDateTime } from './epoch';
/**
 * The signature, composed by a signatory and various dataURL formats.
 */
export declare class Signature extends Resource {
    /**
     * The contact who signed.
     */
    signatory: string;
    /**
     * The timestamp of the signature.
     */
    timestamp: epochDateTime;
    /**
     * The PNG representation of the signature.
     */
    pngURL: string;
    load(x: any): void;
    validate(): string[];
    /**
     * Check whether the signature object has the same content of another one.
     */
    isSame(otherSignature: Signature, skipSignatory?: boolean): boolean;
}