import Database from 'better-sqlite3';
import { AuditSync } from '../audit/audit-sync';
import { AgentdGatewayClient } from '../gateway/gateway-client';
import { DeviceAuth } from '../gateway/auth';
import { Wallet } from '../wallet/wallet';
/**
 * Periodic sync scheduler (spec §7.6, §9.2).
 *
 * Runs every 5 minutes and performs:
 * 1. Fetch org policy from Gateway -> save to synced_policies
 * 2. Sync pending audit entries to Gateway
 * 3. Check VC revocation status for active credentials
 */
export declare class SyncScheduler {
    private readonly gatewayClient;
    private readonly auditSync;
    private readonly wallet;
    private readonly db;
    private readonly projectId;
    private readonly intervalMs;
    private readonly onPolicySynced?;
    private readonly deviceAuth?;
    private timer?;
    private lastSyncTime;
    /** Threshold in seconds before expiry to trigger proactive refresh */
    private static readonly TOKEN_REFRESH_THRESHOLD_SECONDS;
    constructor(gatewayClient: AgentdGatewayClient, auditSync: AuditSync, wallet: Wallet, db: Database.Database, projectId: string, intervalMs?: number, onPolicySynced?: ((time: number) => void) | undefined, deviceAuth?: DeviceAuth | undefined);
    start(): void;
    stop(): void;
    runOnce(): Promise<void>;
    /** Returns the ISO timestamp of the last completed sync, or null if no sync has run yet. */
    getLastSyncTime(): string | null;
    /**
     * Proactively refresh the device session token if it is expiring soon.
     * Runs before other sync tasks to ensure they use a valid token.
     */
    private refreshTokenIfNeeded;
    private syncOrgPolicy;
    private syncAudit;
    private checkVCRevocation;
}
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