/**
 * React Native Keychain adapter (stub)
 *
 * This is a placeholder that will be replaced at runtime if react-native-keychain is installed.
 * The actual implementation would use react-native-keychain.
 */
import type { SecureStorageAdapter, SecureStorageOptions, StorageResult } from "./types";
export declare class ReactNativeKeychainStorage implements SecureStorageAdapter {
    readonly name = "react-native-keychain-stub";
    readonly available: boolean;
    constructor(_options?: SecureStorageOptions);
    get(_key: string): Promise<StorageResult<string | null>>;
    set(_key: string, _value: string): Promise<StorageResult<void>>;
    delete(_key: string): Promise<StorageResult<void>>;
    has(_key: string): Promise<StorageResult<boolean>>;
    clear(): Promise<StorageResult<void>>;
}
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