import { EnvReference } from './env-reference';
import { KeyManager } from '../identity/key-manager';
export interface SecretBackend {
    resolve(ref: EnvReference): Promise<string>;
    store(ref: EnvReference, value: string): Promise<void>;
    delete(ref: EnvReference): Promise<void>;
}
export declare class KeychainBackend implements SecretBackend {
    private readonly keyManager;
    constructor(keyManager: KeyManager);
    resolve(ref: EnvReference): Promise<string>;
    store(ref: EnvReference, value: string): Promise<void>;
    delete(ref: EnvReference): Promise<void>;
}
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