import type { KeyringAdapter } from '../../service/facade.js';
export declare class EnvKeyring implements KeyringAdapter {
    private readonly envPrefix;
    private readonly memoryFallback;
    constructor(envPrefix?: string);
    private envKey;
    getSecret(key: string): Promise<string | null>;
    setSecret(key: string, secret: string): Promise<void>;
    setSecretIfAbsent(key: string, secret: string): Promise<boolean>;
    deleteSecret(key: string): Promise<void>;
}
//# sourceMappingURL=env-keyring.d.ts.map