import type { ClickHouseAdapter } from '../types.js';
export interface CleanupExpiredTransactionsResult {
    cleaned: boolean;
}
/**
 * Cleans up expired/abandoned transaction records from the actions table.
 * Deletes pending transactions where the timeout has passed.
 * Should be called periodically (e.g., on connect or via scheduled job).
 *
 * @param olderThanMs - Optional grace period in milliseconds. Only delete transactions
 *                      that timed out at least this long ago. Default: 0 (delete immediately after timeout)
 */
export declare const cleanupExpiredTransactions: (this: ClickHouseAdapter, olderThanMs?: number) => Promise<CleanupExpiredTransactionsResult>;
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