diff --git a/redbelly-mainnet-node-monitor-2.sh b/redbelly-mainnet-node-monitor-2.sh
index f4376af..97bc14d 100644
--- a/redbelly-mainnet-node-monitor-2.sh
+++ b/redbelly-mainnet-node-monitor-2.sh
@@ -1,31 +1,93 @@
 #!/bin/bash
-
+# Replace your redbelly hostname
+NODE_LINK=""
 # Telegram Bot Configuration
+# Telegram Bot token - replace with your own bot token
 BOT_TOKEN=""
+
+# Telegram Chat ID - replace with your own chat ID
 CHAT_ID=""
+# This is the message ID you want to update.
+MESSAGE_ID=""
+
+check_ssl() {
+    SSL_CHECK=$(curl -m 5 -v "${NODE_LINK}:1111" 2>&1 | awk '/expire / {printf $4$5}')
+
+    # Kiểm tra xem SSL_CHECK có giá trị không (tức là link tồn tại và trả về dữ liệu)
+    if [ -n "$SSL_CHECK" ]; then
+        SSL_VALID=$((($(date +%s -d "$SSL_CHECK") - $(date +%s)) / 86400))
+        echo "SSL left: $SSL_VALID days"
+        # Chỉ gửi cảnh báo nếu SSL_VALID < 15
+        if [ "$SSL_VALID" -lt 15 ]; then
+            send_telegram "🔴 <b>WARNING: SSL will expire in $SSL_VALID days.</b>"
+        fi
+    else
+        echo "SSL check failed: Unable to connect to ${NODE_LINK}:1111"
+        SSL_VALID="N/A"  # Gán giá trị mặc định khi không check được
+    fi
+}
+
+# Send the message to Telegram using Bot API
+send_telegram() {
+    local html_message="$1"
+    local response
+    response=$(curl -s -X POST "https://api.telegram.org/bot$BOT_TOKEN/sendMessage" \
+        -d chat_id="$CHAT_ID" \
+        -d "text=$html_message" \
+        -d "parse_mode=HTML")
+}
 
-# Extract the latest block height from local node logs
-log_block_height=$(tail -n 1000 /var/log/redbelly/rbn_logs/rbbc_logs.log | grep "number" | sed -E 's/.*"number": "([0-9]+)".*/\1/' | tail -n 1)
+update_telegram() {
+    local html_message="$1"
+    #Đặt tin nhắn telegram trong thẻ code
+    #local message_pre="$1"
+    #local html_message="<code>$message_pre</code>"
 
-# Fetch the latest block height from the Redbelly MAINNET RPC endpoint
-latest_block_height=$(curl -s https://governors.mainnet.redbelly.network -X POST -H "Content-Type: application/json" \
---data '{"method":"eth_getBlockByNumber","params":["latest",false],"id":1,"jsonrpc":"2.0"}' \
-| jq -r '.result.number' | xargs -I {} printf "%d\n" {})
+    local message_id
+    local response
 
-# Calculate the absolute difference
-difference=$(echo "$log_block_height $latest_block_height" | awk '{print ($1 > $2) ? $1 - $2 : $2 - $1}')
+    # Try to update the message
+    response=$(curl -s -X POST "https://api.telegram.org/bot$BOT_TOKEN/editMessageText" \
+        -d chat_id="$CHAT_ID" \
+        -d message_id="$MESSAGE_ID" \
+        -d parse_mode="HTML" \
+        -d text="$html_message")
+}
 
-# Get system info
-timestamp=$(date '+%Y-%m-%d %H:%M:%S')
-cpu_load=$(uptime | awk -F'load average:' '{ print $2 }' | sed 's/^ *//')
-ram_used=$(free -m | awk '/Mem:/ {print $3}')
-ram_total=$(free -m | awk '/Mem:/ {print $2}')
-disk_usage=$(df -h / | awk 'NR==2 {print $3 "/" $2 " (" $5 " used)"}')
+get_block_heights() {
+    # Extract the latest block height from local node logs
+    log_block_height=$(tail -n 1000 /var/log/redbelly/rbn_logs/rbbc_logs.log | grep "number" | sed -E 's/.*"number": "([0-9]+)".*/\1/' | tail -n 1)
 
-# Only send notification if not synced
-if [ "$difference" -gt 1 ]; then
-    sync_status="❌ <b>Not Synced</b>"
+    # Fetch the latest block height from the Redbelly MAINNET RPC endpoint
+    latest_block_height=$(curl -s https://governors.mainnet.redbelly.network -X POST -H "Content-Type: application/json" \
+    --data '{"method":"eth_getBlockByNumber","params":["latest",false],"id":1,"jsonrpc":"2.0"}' \
+    | jq -r '.result.number' | xargs -I {} printf "%d\n" {})
 
+    # Calculate the absolute difference between the local and network block height
+    difference=$(echo "$log_block_height $latest_block_height" | awk '{print ($1 > $2) ? $1 - $2 : $2 - $1}')
+
+    # Determine sync status based on difference
+    if [ "$difference" -le 1 ]; then
+        sync_status="✅ <b>Synced</b>"
+    else
+        sync_status="❌ <b>Not Synced</b>"
+        send_telegram "❌ <b>Alert: Your Redbelly node is out of sync!</b>"
+    fi
+}
+
+main() {
+    check_ssl
+    get_block_heights
+    # Get current timestamp
+    timestamp=$(date '+%Y-%m-%d %H:%M:%S')
+
+    # Get system resource usage
+    cpu_load=$(uptime | awk -F'load average:' '{ print $2 }' | sed 's/^ *//')
+    ram_used=$(free -m | awk '/Mem:/ {print $3}')
+    ram_total=$(free -m | awk '/Mem:/ {print $2}')
+    disk_usage=$(df -h / | awk 'NR==2 {print $3 "/" $2 " (" $5 " used)"}')
+
+    # Build HTML message to send to Telegram
     html_message="<b>🧾 Node Sync Status (Mainnet)</b>%0A"
     html_message+="<b>🕒 Time:</b> $timestamp%0A"
     html_message+="<b>📦 Node Block:</b> $log_block_height%0A"
@@ -36,10 +98,11 @@ if [ "$difference" -gt 1 ]; then
     html_message+="<b>💻 System Info</b>%0A"
     html_message+="<b>🧠 CPU Load:</b> $cpu_load%0A"
     html_message+="<b>🗂 RAM:</b> ${ram_used}MB / ${ram_total}MB%0A"
-    html_message+="<b>💽 Disk:</b> $disk_usage"
+    html_message+="<b>💽 Disk:</b> $disk_usage%0A"
+    html_message+="<b>SSL valid:</b> $([ "$SSL_CHECK" != "N/A" ] && date -d "$SSL_CHECK" +'%d/%m/%Y' || echo "N/A") ($SSL_VALID days left)"
 
-    curl -s -X POST "https://api.telegram.org/bot$BOT_TOKEN/sendMessage" \
-        -d "chat_id=$CHAT_ID" \
-        -d "text=$html_message" \
-        -d "parse_mode=HTML"
-fi
+    # update message
+    update_telegram "$html_message"
+}
+# Execute
+main