/**
 * BaseEvent is a simple base class for all integration events.
 * It enforces a consistent shape and ensures only subclasses can be produced.
 *
 * Usage example:
 *
 * export class UserCreatedEvent extends BaseEvent<{ id: number; email: string }> {
 *   public readonly name = 'user.created' as const;
 *   constructor(id: number, email: string, occurredAt?: Date) {
 *     super({ id, email }, occurredAt);
 *   }
 * }
 */
export declare abstract class BaseEvent<TPayload extends object> {
    /** Human-readable event name, e.g., "user.created" */
    abstract get name(): string;
    /** Structured data payload */
    readonly payload: TPayload;
    /** ISO time when the event occurred */
    readonly occurredAt?: string;
    protected constructor(payload: TPayload, occurredAt?: Date);
}
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