import { type EventAdapterIdV3 } from "../../events/v3/adapter-id.js";
import { type CoordinationGenerationViewV3 } from "../../events/v3/coordination-view.js";
import { type Heartbeat } from "./heartbeat-reader.js";
/**
 * Heartbeat files are disposable V3 caches. These bindings prevent a stale
 * row from a prior generation from being mistaken for current authority.
 */
export interface V3HeartbeatMaterialization extends Heartbeat {
    schema_version: 2;
    v3_instance_id: `inst_${string}`;
    v3_generation_id: `gen_${string}`;
    v3_projection_event_id: string;
    v3_task_state: "set" | "cleared";
}
/** Read the live coordination rows through the hard-cut ledger route. */
export declare function readLiveCoordinationRows(coordRoot: string): V3HeartbeatMaterialization[];
/** Read one current row from the authority-safe V3 projection. */
export declare function readLiveCoordinationRow(coordRoot: string, nativeInstanceId: string): V3HeartbeatMaterialization | null;
/**
 * Resolve the adapter from the current authority-safe V3 generation. A live
 * V3 generation is stronger evidence than a missing or stale heartbeat, so
 * callers must never substitute another adapter when this function succeeds.
 */
export declare function liveCoordinationAdapterV3(coordRoot: string, nativeInstanceId: string): EventAdapterIdV3 | null;
export declare function isCurrentV3HeartbeatCache(cache: Heartbeat | null | undefined, generation: CoordinationGenerationViewV3): cache is Heartbeat;
export declare function projectHeartbeatV3(coordRoot: string, generation: CoordinationGenerationViewV3, cache: Heartbeat | undefined, nativeInstanceId: string | undefined, parent?: CoordinationGenerationViewV3): V3HeartbeatMaterialization;
export declare function observedAdapterV3(generation: CoordinationGenerationViewV3): string | undefined;
export declare function isAdapterV3(value: string | undefined): value is EventAdapterIdV3;
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