import { ConfigService } from '@nestjs/config';
export declare class NowPaymentsService {
    private configService;
    private readonly apiUrl;
    private readonly apiKey;
    constructor(configService: ConfigService);
    createPremiumPayment(userId: number): Promise<{
        paymentId: any;
        paymentUrl: any;
        orderId: string;
    }>;
    verifyIpnSignature(payload: any, signature: string): boolean;
}