/**
 * Centralized internal identifiers and tuning defaults.
 *
 * The string values here are the cross-tab `BroadcastChannel` topic names and
 * the internal `SubscriptionManager` event keys. They are an implementation
 * detail of a single library version — every tab runs the same build — not a
 * wire/server protocol, so the literal values can change freely as long as
 * they stay consistent within a release. Keeping them in one place removes the
 * scatter of magic strings and the risk of an emit/handler typo mismatch.
 */
/** BroadcastChannel name shared by every tab of one SharedWebSocket instance. */
export declare const MESSAGE_BUS_CHANNEL = "shared-ws";
export declare const COORD: {
    /** Candidate announces an election (carries its tabId). */
    readonly ELECTION: "coord:election";
    /** Current leader rejects a candidate. */
    readonly REJECT: "coord:reject";
    /** Leader liveness beat. */
    readonly HEARTBEAT: "coord:heartbeat";
    /** Leader relinquished — followers should elect. */
    readonly ABDICATE: "coord:abdicate";
    /** Health probe sent to the leader. */
    readonly PING: "coord:ping";
    /** Forced demotion demanded by an active tab taking over. */
    readonly STEP_DOWN: "coord:step-down";
};
/** One-shot reply topic for a health ping keyed by replyId. */
export declare const coordPongReply: (replyId: string) => string;
export declare const BUS: {
    /** Incoming server frame fanned out to every tab. */
    readonly MESSAGE: "ws:message";
    /** Follower → leader outbound dispatch request. */
    readonly DISPATCH: "ws:dispatch";
    /** Leader → originator ack: drop the buffered entry. */
    readonly DISPATCH_FLUSHED: "ws:dispatch-flushed";
    /** New leader asks every tab for still-pending dispatches. */
    readonly GATHER_PENDING: "ws:gather-pending";
    /** New leader asks every tab for its channels/topics. */
    readonly GATHER_SUBS: "ws:gather-subs";
    /** Cross-tab state sync (no server roundtrip). */
    readonly SYNC: "ws:sync";
    /** Request/response routed to the leader's socket. */
    readonly REQUEST: "ws:request";
    /** Follower asks the leader to reconnect. */
    readonly RECONNECT: "ws:reconnect";
    /** Follower hint to reconnect a failed socket after re-auth. */
    readonly AUTH_RESUME: "ws:authenticate-resume";
    /** Lifecycle events broadcast to all tabs. */
    readonly LIFECYCLE: "ws:lifecycle";
};
/** Reply topic for a pending-dispatch gather keyed by replyId. */
export declare const busPendingReply: (replyId: string) => string;
/** Reply topic for a subscription gather keyed by replyId. */
export declare const busSubsReply: (replyId: string) => string;
export declare const LIFECYCLE: {
    readonly CONNECT: "$lifecycle:connect";
    readonly DISCONNECT: "$lifecycle:disconnect";
    readonly RECONNECTING: "$lifecycle:reconnecting";
    readonly RECONNECT_FAILED: "$lifecycle:reconnectFailed";
    readonly LEADER: "$lifecycle:leader";
    readonly ERROR: "$lifecycle:error";
    readonly AUTH: "$lifecycle:auth";
    readonly ACTIVE: "$lifecycle:active";
};
/** Sync-store key holding the runtime auth token. */
export declare const AUTH_TOKEN_KEY = "$auth:token";
/** TabCoordinator timing defaults (ms). */
export declare const COORD_DEFAULTS: {
    readonly ELECTION_TIMEOUT: 200;
    readonly HEARTBEAT_INTERVAL: 2000;
    readonly LEADER_TIMEOUT: 5000;
    readonly LEADER_PING_TIMEOUT: 1500;
    /** How often a follower re-checks the leader heartbeat. */
    readonly LEADER_CHECK_INTERVAL: 1000;
};
/** SharedSocket connection defaults. */
export declare const SOCKET_DEFAULTS: {
    readonly RECONNECT_MAX_DELAY: 30000;
    readonly HEARTBEAT_INTERVAL: 30000;
    readonly SEND_BUFFER: 100;
    /** Initial reconnect backoff before exponential growth. */
    readonly BACKOFF_BASE: 1000;
    /** Default "auth failed — stop retrying" close code (PolicyViolation). */
    readonly AUTH_FAILURE_CLOSE_CODE: 1008;
};
/** SharedWebSocket / Outbox defaults. */
export declare const WS_DEFAULTS: {
    readonly OUTBOUND_BUFFER_SIZE: 100;
    /** Cross-tab subscription-gather window (ms). */
    readonly GATHER_SUBS_TIMEOUT: 150;
    /** Cross-tab pending-dispatch-gather window (ms). */
    readonly GATHER_PENDING_TIMEOUT: 100;
    /** Default request/response timeout (ms). */
    readonly REQUEST_TIMEOUT: 5000;
    /** Default Channel.ready ack timeout (ms). */
    readonly CHANNEL_ACK_TIMEOUT: 5000;
};