use mulitple reference rpc

reference-rpc-endpoint.sh

@@ -1,35 +1,61 @@
 #!/bin/bash
 
+# Check if more than two arguments are provided
 if [ $# -gt 2 ]; then
+    echo "Usage: $0 <chainid> [<index>]"
     exit 1
 fi
 
 id="$1"
+index="${2:-all}"
 
-if [[ $id == 0x* ]]; then
+# Convert hex id to decimal if necessary
+if [[ "$id" == "0x"* ]]; then
     id=$(printf "%d" "$id")
 fi
 
-index="${2:-0}"
-
 json_file="/root/rpc/reference-rpc-endpoint.json"
+
+# Check if JSON file exists
 if [ ! -f "$json_file" ]; then
+    echo "JSON file not found: $json_file"
     exit 1
 fi
 
+# Find the object with matching id
 object=$(jq --arg id "$id" '.[] | select(.id == ($id | tonumber))' "$json_file")
 
+# If object not found, exit
 if [ -z "$object" ]; then
+    echo "Chain ID not found: $id"
     exit 1
 fi
 
+# Extract URLs from the object
 urls=$(echo "$object" | jq -r '.urls')
 
-num_urls=$(echo "$urls" | jq -r 'length')
-if [ "$index" -ge "$num_urls" ]; then
+# If index is set to 'all', return all URLs separated by whitespace
+if [ "$index" = "all" ]; then
+    echo "$urls" | jq -r '.[]' | tr '\n' ' '
+    exit
+fi
+
+# Otherwise, treat index as numeric
+# Validate that index is a number
+if ! [[ "$index" =~ ^[0-9]+$ ]]; then
+    echo "Invalid index: $index"
     exit 1
 fi
 
-url=$(echo "$urls" | jq -r ".[$index]")
+# Get the number of URLs
+num_urls=$(echo "$urls" | jq -r 'length')
 
+# Check if index is within bounds
+if [ "$index" -ge "$num_urls" ]; then
+    echo "Index out of bounds: $index (max $(($num_urls - 1)))"
+    exit 1
+fi
+
+# Get and print the URL at the specified index
+url=$(echo "$urls" | jq -r ".[$index]")
 echo "$url"