import { ModelsService } from 'src/models/models.service';
import { Types } from 'mongoose';
export declare class BillingLedgerService {
    private readonly model;
    constructor(model: ModelsService);
    handleVehicleCountChange(subscription_id: Types.ObjectId, transport_admin_id: Types.ObjectId, old_count: number, new_count: number, reason: string): Promise<(import("mongoose").Document<unknown, {}, import("./schema/billing-ledger.schema").BillingLedger, {}> & import("./schema/billing-ledger.schema").BillingLedger & Required<{
        _id: unknown;
    }> & {
        __v: number;
    }) | undefined>;
}