refactor

check-health.sh

@@ -0,0 +1,91 @@
+#!/bin/bash
+
+RPC_URL="$1"
+ref="$2"
+
+response_file=$(mktemp)
+
+http_status_code=$(curl --ipv4 -m 1 -s -X POST -w "%{http_code}" -o "$response_file" -H "Content-Type: application/json" --data '{"jsonrpc":"2.0","method":"eth_getBlockByNumber","params":["latest", false],"id":1}' $RPC_URL)
+
+if [ $? -eq 0 ]; then
+    if [[ $http_status_code -eq 200 ]]; then
+        response=$(cat "$response_file")
+        latest_block_timestamp=$(echo "$response" | jq -r '.result.timestamp')
+        latest_block_timestamp_decimal=$((16#${latest_block_timestamp#0x}))
+        current_time=$(date +%s)
+        time_difference=$((current_time - latest_block_timestamp_decimal))
+
+        rm "$response_file"
+        
+        if [ -n "$ref" ]; then
+            latest_block_number=$(echo "$response" | jq -r '.result.number')
+            latest_block_hash=$(echo "$response" | jq -r '.result.hash')            
+            response_file2=$(mktemp)
+            
+            http_status_code2=$(curl --ipv4 -m 1 -s -X POST -w "%{http_code}" -o "$response_file2" -H "Content-Type: application/json" --data "{\"jsonrpc\":\"2.0\",\"method\":\"eth_getBlockByNumber\",\"params\":[\"$latest_block_number\", false],\"id\":1}" $ref)
+            if [ $? -eq 0 ]; then
+                if [[ $http_status_code2 -eq 200 ]]; then
+                    response2=$(cat "$response_file2")
+                    latest_block_hash2=$(echo "$response2" | jq -r '.result.hash')
+
+                    rm "$response_file2"
+                    
+                    if [ "$latest_block_hash" == "$latest_block_hash2" ]; then
+                        response_file3=$(mktemp)
+
+                        http_status_code=$(curl --ipv4 -m 1 -s -X POST -w "%{http_code}" -o "$response_file3" -H "Content-Type: application/json" --data "{\"jsonrpc\":\"2.0\",\"method\":\"eth_getBlockByNumber\",\"params\":[\"latest\", false],\"id\":1}" $ref)
+                        
+                        if [ $? -eq 0 ]; then
+                            if [[ $http_status_code -eq 200 ]]; then
+                                response3=$(cat "$response_file3")
+                                latest_block_timestamp3=$(echo "$response3" | jq -r '.result.timestamp')
+                                latest_block_timestamp_decimal3=$((16#${latest_block_timestamp3#0x}))
+                                time_difference3=$(( latest_block_timestamp_decimal3 - latest_block_timestamp_decimal ))
+
+                                rm "$response_file3"
+                                
+                                if [ $time_difference3 -lt 2 ]; then
+                                    echo "online"
+                                    exit 0
+                                elif [ $time_difference3 -lt 5 ]; then
+                                    echo "lagging"
+                                    exit 0
+                                else
+                                    echo "syncing"
+                                    exit 1
+                                fi
+                            fi
+                        fi
+                    else
+                        echo "forked"
+                        exit 1
+                    fi
+                fi                
+            fi
+            
+            echo "unverified"
+            exit 1               
+        elif [ $time_difference -lt 60 ]; then
+            echo "online"
+            exit 0
+        else
+            echo "behind"
+            exit 1
+        fi        
+    elif [[ $http_status_code -eq 404 ]]; then
+        echo "offline"
+        exit 1
+    elif [[ $http_status_code -eq 401 ]]; then
+        echo "unauthorized"
+        exit 1
+    elif [[ $http_status_code -eq 500 ]]; then
+        echo "error"
+        exit 1    
+    else
+        echo "Unexpected HTTP status code: $http_status_code"
+        exit 1
+    fi
+else
+    echo "timeout"
+    exit 1        
+fi