From 046195503c535f18eb83f5876e49ab2953e89bc5 Mon Sep 17 00:00:00 2001
From: Sik Yoon <younxxxx@gmail.com>
Date: Mon, 31 Jul 2023 22:46:44 +0900
Subject: [PATCH] Add error handling

---
 src/signal_association/coinmarketcap.rs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/signal_association/coinmarketcap.rs b/src/signal_association/coinmarketcap.rs
index f73f2fa..f09212a 100644
--- a/src/signal_association/coinmarketcap.rs
+++ b/src/signal_association/coinmarketcap.rs
@@ -162,6 +162,11 @@ pub async fn market_cap_index() -> Result<(), Box<dyn std::error::Error + Send +
             Ok(T) => {
                 text = T.text().await?;
                 v = serde_json::from_str(text.as_str()).unwrap();
+                
+                if v.as_object().is_none() {
+                    return Err("Err")?;
+                }
+
                 into_vec = v
                     .as_object()
                     .unwrap()