import { PrismaService } from '../../prisma/prisma.service';
export declare class DashboardService {
    private readonly prisma;
    constructor(prisma: PrismaService);
    private serializeBigInt;
    getOverview(userId: number): Promise<any>;
    getRecentActivity(userId: number): Promise<any>;
    getMonthlyChart(userId: number, year: number): Promise<{
        year: number;
        monthly: {
            month: number;
            revenue: number;
            expenses: number;
        }[];
    }>;
}