import { PrismaService } from "../prisma/prisma.service";
import { GlobalBillingStatsDto, MerchantBillingStatsDto } from "./dto/billing-stats.dto";
export declare class BillingStatsService {
    private readonly prisma;
    constructor(prisma: PrismaService);
    merchantStats(merchantId: string, period?: string): Promise<MerchantBillingStatsDto>;
    globalStats(period?: string): Promise<GlobalBillingStatsDto>;
    private hydrateTopMerchants;
    private toCurrencyVolume;
    private resolvePeriod;
}