import type { NodeMeta, NodeRow, NodeStatus, SubscriptionRef } from './types.js';
import type { Scope } from '../../types.js';
export interface CanvasSource {
    getNode(nodeId: string): Promise<NodeMeta | null>;
    getRow(nodeId: string): Promise<NodeRow | null>;
    listNodes(filter?: {
        status?: NodeStatus | NodeStatus[];
    }): Promise<NodeRow[]>;
    subscriptionsOf(subscriber: string): Promise<SubscriptionRef[]>;
    subscribersOf(publisher: string): Promise<SubscriptionRef[]>;
    view(root: string): Promise<string[]>;
    ticketCountsForView(root: string): Promise<Record<string, number>>;
    hasActiveLiveSubscription(nodeId: string): Promise<boolean>;
}
export declare class LocalCanvasSource implements CanvasSource {
    getNode(nodeId: string): Promise<NodeMeta | null>;
    getRow(nodeId: string): Promise<NodeRow | null>;
    listNodes(filter?: {
        status?: NodeStatus | NodeStatus[];
    }): Promise<NodeRow[]>;
    subscriptionsOf(subscriber: string): Promise<SubscriptionRef[]>;
    subscribersOf(publisher: string): Promise<SubscriptionRef[]>;
    view(root: string): Promise<string[]>;
    ticketCountsForView(root: string): Promise<Record<string, number>>;
    hasActiveLiveSubscription(nodeId: string): Promise<boolean>;
}
export declare const localCanvasSource: CanvasSource;
/** The active read source for a command: an explicit `--canvas <name>` wins,
 *  else the durable `crtr canvas use` selection (`ScopeState.activeCanvas`),
 *  else local — byte-for-byte the same `localCanvasSource` singleton so a
 *  caller with neither set sees zero behavior change. */
export declare function resolveCanvasSource(opts?: {
    canvasName?: string;
    scope?: Scope;
}): CanvasSource;