export declare const DEFAULT_SYNC_STALL_OBSERVATION_LIMIT = 2;
export declare const DEFAULT_SYNC_STALL_MIN_AGE_MS = 60000;
export interface SchemaSyncStallSnapshot {
    status?: string | null;
    localRows?: number | null;
    pinnedRows?: number | null;
    syncedRows?: number | null;
    downloadedBytes?: number | null;
    totalRows?: number | null;
    missingRows?: number | null;
    cursor?: string | null;
    nextCursor?: string | null;
    highWaterMark?: string | null;
    chunkHash?: string | null;
    error?: string | null;
    progressFingerprint?: string | null;
    lastAdvancedAt?: string | null;
    lastProgressObservedAt?: string | null;
    stallObservationCount?: number | null;
    stalledSince?: string | null;
}
export interface SchemaSyncStallState {
    progressFingerprint: string | null;
    lastAdvancedAt: string | null;
    lastProgressObservedAt: string | null;
    stallObservationCount: number;
    stalledSince: string | null;
}
export interface SchemaSyncStallOptions {
    observationLimit?: number;
    minAgeMs?: number;
}
export declare function schemaSyncProgressFingerprint(progress: SchemaSyncStallSnapshot): string;
export declare function nextSchemaSyncStallState(previous: SchemaSyncStallSnapshot | null | undefined, current: SchemaSyncStallSnapshot, nowIso?: string, options?: SchemaSyncStallOptions): SchemaSyncStallState;
export declare function isSchemaSyncProgressStalled(progress: SchemaSyncStallSnapshot): boolean;
//# sourceMappingURL=schema-sync-stall.d.ts.map