import type { HealthStatus, ISecretProvider, SecretProviderConfig, SecretValue } from "../../../../shared/interfaces/secret-provider.interface.js";
/**
 * Base abstract class for secret providers
 * Provides common functionality for all secret provider implementations
 */
export declare abstract class BaseSecretProvider implements ISecretProvider {
    /**
     * Provider name (must be implemented by subclasses)
     */
    abstract readonly name: string;
    /**
     * Check if this provider supports the given provider type
     */
    abstract supports(providerType: string): boolean;
    /**
     * Fetch a secret from this provider (must be implemented by subclasses)
     */
    abstract fetch(config: SecretProviderConfig): Promise<SecretValue>;
    /**
     * Rotate a secret (optional, default implementation throws not supported)
     */
    rotate(_config: SecretProviderConfig): Promise<void>;
    /**
     * Check provider health (must be implemented by subclasses)
     */
    abstract healthCheck(): Promise<HealthStatus>;
    /**
     * Helper: Create secret value from components
     */
    protected createSecretValue(key: string, value: string, version?: string, expiresAt?: Date): SecretValue;
    /**
     * Helper: Validate configuration
     */
    protected validateConfig(config: SecretProviderConfig, requiredFields: string[]): void;
}
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