import { type CommittedEventMetadata, type Message, type Messages, type Snapshot, type State } from "../types";
/**
 * Validates and handles command message
 * @param command the command message
 * @param metadata the optional metadata of the event that triggered this command
 * @returns last snapshot
 */
export default function command<S extends State, C extends Messages, E extends Messages>(command: Message<C>, metadata?: CommittedEventMetadata, skipValidation?: boolean): Promise<Snapshot<S, E> | undefined>;
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