import { ConfigService } from '@nestjs/config'; export declare class BinanceProvider { private configService; private readonly logger; private readonly apiUrl; constructor(configService: ConfigService); private get apiKey(); private get secretKey(); private generateSignature; createOrder(tenantId: string, amount: number, plan: string): Promise<{ checkoutUrl: any; orderId: string; prepayId: any; }>; verifySignature(timestamp: string, nonce: string, signature: string, payloadBody: any): boolean; }