/** Status of a peer in the cluster. */
export type PeerStatus = "alive" | "leaving" | "dead";
/**
 * Represents the state of a single peer in the gossip network.
 */
export interface PeerState {
    /** Unique ID of the peer node. */
    id: string;
    /** ZeroMQ address for RPC communication (e.g., tcp://127.0.0.1:5555). */
    address: string;
    /** Current heartbeat counter of the peer. */
    heartbeat: number;
    /** Generation counter of the peer, incremented on restart. */
    generation: number;
    /** UDP address for gossip communication (e.g., udp://127.0.0.1:6000). */
    gossipAddress: string;
    /** Local timestamp when this peer's state was last updated. */
    lastUpdated: number;
    /** Status of the peer. Default: "alive" */
    status?: PeerStatus;
    /** Roles declared by this node (e.g., ["gateway", "worker"]). */
    roles?: string[];
    /** Custom metadata key-value pairs propagated via gossip. */
    metadata?: Record<string, string>;
}
/**
 * Represents a gossip message exchanged between peers.
 * It contains the sender's ID and its entire peer table.
 */
export interface GossipMessage {
    /** Protocol version for forward/backward compatibility. */
    version?: number;
    /** The ID of the node sending this gossip message. */
    senderId: string;
    /** The sender's entire view of the peer table. */
    peers: PeerState[];
}
/** Protocol version for gossip messages. Increment when message format changes. */
export declare const GOSSIP_PROTOCOL_VERSION = 1;
/**
 * Represents an authenticated gossip message with optional HMAC and nonce.
 * Extends GossipMessage with optional authentication fields for signed messages.
 * The optional fields ensure backward compatibility with unauthenticated messages.
 */
export interface AuthenticatedGossipMessage extends GossipMessage {
    /** Hex-encoded random bytes used for replay protection. */
    nonce?: string;
    /** Hex-encoded HMAC-SHA256 digest of the message. */
    hmac?: string;
}
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