/**
 * Base Login Attempt Entity
 *
 * Failed login tracking for security auditing and rate limiting.
 * Database adapters extend this class and add ORM-specific decorators.
 *
 * @remarks
 * This class is database-agnostic. TypeORM, Prisma, or other ORMs
 * extend this class in their respective packages.
 */
export declare class BaseLoginAttempt {
    /**
     * Internal login attempt ID
     */
    id: number;
    /**
     * Email/username used in login attempt
     * May be NULL for malformed requests
     */
    email?: string | null;
    /**
     * Internal user ID (foreign key to users table)
     * Nullable since login attempt might be for non-existent user
     */
    userId?: number | null;
    /**
     * IP address of login attempt
     */
    ipAddress?: string | null;
    /**
     * User agent string
     */
    userAgent?: string | null;
    /**
     * Whether login was successful
     */
    success: boolean;
    /**
     * Reason for login failure
     * Examples: "invalid_credentials", "account_locked", "mfa_required"
     */
    failureReason?: string | null;
    /**
     * Whether MFA was required for this attempt
     */
    mfaRequired: boolean;
    /**
     * Additional metadata (JSON)
     */
    metadata?: Record<string, unknown> | null;
    /**
     * Login attempt timestamp
     */
    createdAt: Date;
}
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