Ревью: мультиарендный обработчик на Go

func listInvoices(w http.ResponseWriter, r *http.Request) {
	tenant := r.Header.Get("X-Tenant-ID")
	status := r.URL.Query().Get("status")
	rows, err := db.Query("SELECT id, amount, customer FROM invoices WHERE tenant_id = $1 AND status = $2", tenant, status)
	if err != nil {
		http.Error(w, err.Error(), 500)
		return
	}
	writeJSON(w, scan(rows))
}

func getInvoice(w http.ResponseWriter, r *http.Request) {
	id := chi.URLParam(r, "id")
	row := db.QueryRow("SELECT id, amount, customer FROM invoices WHERE id = $1", id)
	writeJSON(w, scanOne(row))
}