/**
 * @name Zip
 * @description
 * A Cordova plugin to unzip files in Android and iOS.
 *
 * @usage
 * ```
 * import {Zip} from 'ionic-native';
 *
 * Zip.unzip('path/to/source.zip', 'path/to/dest', (progress) => console.log('Unzipping, ' + Math.round((progress.loaded / progress.total) * 100) + '%'))
 *  .then((result) => {
 *    if(result === 0) console.log('SUCCESS');
 *    if(result === -1) console.log('FAILED');
 *  });
 *
 * ```
 */
export declare class Zip {
    /**
     * Extracts files from a ZIP archive
     * @param sourceZip {string} Source ZIP file
     * @param destUrl {string} Destination folder
     * @param onProgress {Function} optional callback to be called on progress update
     * @returns {Promise<number>} returns a promise that resolves with a number. 0 is success, -1 is error
     */
    static unzip(sourceZip: string, destUrl: string, onProgress?: Function): Promise<number>;
}