블록체인 기술을 비즈니스에 연결합니다

use axum::{Router, Json};use crate::invoice::CreateInvoiceReq; #[tokio::main]async fn main() {    let app = Router::new()        .route("/v1/invoices",            post(create_invoice))        .route("/health", get(health));     // 🚀 Zero-cost abstractions    axum::serve(listener, app).await?;} async fn create_invoice(    Json(req): Json<CreateInvoiceReq>,) -> Json<InvoiceResponse> {    // Multi-chain dispatch    let addr = wallet        .generate_address(req.coin)        .await?;     Json(InvoiceResponse {        invoice_id: Uuid::new_v4(),        address: addr,        status: Status::Created,    })}