import { PrismaService } from '../prisma/prisma.service';
export declare class LedgerImageService {
    private prisma;
    constructor(prisma: PrismaService);
    findByActNo(actNo: string): Promise<{
        img: string | null;
        id: number;
        kind: number;
        tno: string;
        note: string | null;
    } | null>;
    upsert(actNo: string, imgBase64: string | null, note?: string): Promise<{
        img: string | null;
        id: number;
        kind: number;
        tno: string;
        note: string | null;
    }>;
    delete(actNo: string): Promise<{
        id: number;
        kind: number;
        tno: string;
        note: string | null;
        img: Buffer | null;
    }>;
}