import type { ADB } from 'appium-adb';
/**
 * @param filePath - Path to check
 * @returns Whether the file is writeable by the current process
 */
export declare function isWriteable(filePath: string): Promise<boolean>;
/**
 * Ensures the app at `appPath` is writeable, then signs it with the given ADB instance.
 *
 * @param adb - ADB instance used to sign the APK
 * @param appPath - Path to the application package
 */
export declare function signApp(adb: ADB, appPath: string): Promise<void>;
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