Small fixes

nodes/node_balancer/cmd/nodebalancer/balancer.go

@@ -105,27 +105,7 @@ func (node *Node) UpdateNodeState(currentBlock uint64, alive bool) (callCounter
 	return callCounter
 }
 
-// IncreaseCallCounter increased to 1 each time node called
+// FilterTagsNodes returns nodes with provided tags
-func (node *Node) IncreaseCallCounter() {
-	node.mux.Lock()
-	if node.CallCounter >= NB_MAX_COUNTER_NUMBER {
-		log.Printf("Number of calls for node %s reached %d limit, reset the counter.", node.Endpoint, NB_MAX_COUNTER_NUMBER)
-		node.CallCounter = uint64(0)
-	} else {
-		node.CallCounter++
-	}
-	node.mux.Unlock()
-}
-
-func containsGeneric[T comparable](b []T, e T) bool {
-	for _, v := range b {
-		if v == e {
-			return true
-		}
-	}
-	return false
-}
-
 func (npool *NodePool) FilterTagsNodes(tags []string) ([]*Node, TopNodeBlock) {
 	nodesMap := npool.NodesMap
 	nodesSet := npool.NodesSet
@@ -174,7 +154,7 @@ func GetNextNode(nodes []*Node, topNode TopNodeBlock) *Node {
 		if node.IsAlive() {
 			currentBlock := node.CurrentBlock
 			if currentBlock < topNode.Block-NB_HIGHEST_BLOCK_SHIFT {
-				// Bypass outdated nodes
+				// Bypass too outdated nodes
 				continue
 			}
 			if node.CallCounter < nextNode.CallCounter {
@@ -183,13 +163,11 @@ func GetNextNode(nodes []*Node, topNode TopNodeBlock) *Node {
 		}
 	}
 
-	if nextNode == nil {
+	if nextNode != nil {
-		return nil
+		// Increase CallCounter value with 1
+		atomic.AddUint64(&nextNode.CallCounter, uint64(1))
 	}
 
-	// Increase CallCounter value with 1
-	atomic.AddUint64(&nextNode.CallCounter, uint64(1))
-
 	return nextNode
 }
 
@@ -221,41 +199,41 @@ func StatusLog() {
 // HealthCheck fetch the node latest block
 func HealthCheck() {
 	for blockchain, nodes := range blockchainPools {
-		for _, n := range nodes.NodesSet {
+		for _, node := range nodes.NodesSet {
 			alive := false
 
 			httpClient := http.Client{Timeout: NB_HEALTH_CHECK_CALL_TIMEOUT}
 			resp, err := httpClient.Post(
-				n.Endpoint.String(),
+				node.Endpoint.String(),
 				"application/json",
 				bytes.NewBuffer([]byte(`{"jsonrpc":"2.0","method":"eth_getBlockByNumber","params":["latest", false],"id":1}`)),
 			)
 			if err != nil {
-				n.UpdateNodeState(0, alive)
+				node.UpdateNodeState(0, alive)
-				log.Printf("Unable to reach node: %s", n.Endpoint.Host)
+				log.Printf("Unable to reach node: %s", node.Endpoint.Host)
 				continue
 			}
 			defer resp.Body.Close()
 
 			body, err := ioutil.ReadAll(resp.Body)
 			if err != nil {
-				n.UpdateNodeState(0, alive)
+				node.UpdateNodeState(0, alive)
-				log.Printf("Unable to parse response from %s node, err %v", n.Endpoint.Host, err)
+				log.Printf("Unable to parse response from %s node, err %v", node.Endpoint.Host, err)
 				continue
 			}
 
 			var statusResponse NodeStatusResponse
 			err = json.Unmarshal(body, &statusResponse)
 			if err != nil {
-				n.UpdateNodeState(0, alive)
+				node.UpdateNodeState(0, alive)
-				log.Printf("Unable to read json response from %s node, err: %v", n.Endpoint.Host, err)
+				log.Printf("Unable to read json response from %s node, err: %v", node.Endpoint.Host, err)
 				continue
 			}
 
 			blockNumberHex := strings.Replace(statusResponse.Result.Number, "0x", "", -1)
 			blockNumber, err := strconv.ParseUint(blockNumberHex, 16, 64)
 			if err != nil {
-				n.UpdateNodeState(0, alive)
+				node.UpdateNodeState(0, alive)
 				log.Printf("Unable to parse block number from hex to string, err: %v", err)
 				continue
 			}
@@ -264,15 +242,24 @@ func HealthCheck() {
 			if blockNumber != 0 {
 				alive = true
 			}
-			callCounter := n.UpdateNodeState(blockNumber, alive)
+			callCounter := node.UpdateNodeState(blockNumber, alive)
 
 			if blockNumber > nodes.TopNode.Block {
 				nodes.TopNode.Block = blockNumber
-				nodes.TopNode.Node = n
+				nodes.TopNode.Node = node
+			}
+
+			if node.CallCounter >= NB_MAX_COUNTER_NUMBER {
+				log.Printf(
+					"Number of CallCounter for node %s reached %d limit, reset the counter.",
+					node.Endpoint, NB_MAX_COUNTER_NUMBER,
+				)
+				atomic.StoreUint64(&node.CallCounter, uint64(0))
 			}
 
 			log.Printf(
-				"In blockchain %s node %s is alive: %t with current block: %d called: %d times", blockchain, n.Endpoint.Host, alive, blockNumber, callCounter,
+				"Blockchain %s node %s is alive: %t with current block: %d called: %d times",
+				blockchain, node.Endpoint.Host, alive, blockNumber, callCounter,
 			)
 		}
 	}

nodes/node_balancer/cmd/nodebalancer/routes.go

@@ -130,8 +130,6 @@ func lbJSONRPCHandler(w http.ResponseWriter, r *http.Request, blockchain string,
 			}
 		}
 
-		node.IncreaseCallCounter()
-
 		// Overwrite Path so response will be returned to correct place
 		r.URL.Path = "/"
 		node.GethReverseProxy.ServeHTTP(w, r)

nodes/node_balancer/cmd/nodebalancer/server.go

@@ -128,10 +128,11 @@ func Server() {
 		fmt.Printf("Unable to get user with provided access identifier, err: %v\n", err)
 		os.Exit(1)
 	}
+	resourcesLog := "Access with resources established."
 	if len(resources.Resources) != 1 {
-		log.Println("There are no access IDs for users in resources")
+		log.Printf("%s There are no access IDs for users in resources", resourcesLog)
 	} else {
-		log.Println("Found user access IDs in resources")
+		log.Printf("%s Found user access IDs in resources", resourcesLog)
 	}
 
 	// Set internal crawlers access to bypass requests from internal services
@@ -145,7 +146,6 @@ func Server() {
 		BlockchainAccess: true,
 		ExtendedMethods:  true,
 	}
-	log.Printf("Internal crawlers access set with user ID: %s", internalCrawlersUserID)
 
 	err = InitDatabaseClient()
 	if err != nil {
@@ -185,6 +185,8 @@ func Server() {
 			r.Header.Del(strings.Title(NB_DATA_SOURCE_HEADER))
 			// Change r.Host from nodebalancer's to end host so TLS check will be passed
 			r.Host = r.URL.Host
+			// Explicit set of r.URL requires, because by default it adds trailing slash and brake some urls
+			r.URL = endpoint
 		}
 		proxyErrorHandler(proxyToEndpoint, endpoint)
 

nodes/node_balancer/go.mod

@@ -1,6 +1,6 @@
 module github.com/bugout-dev/moonstream/nodes/node_balancer
 
-go 1.18
+go 1.17
 
 require (
 	github.com/bugout-dev/bugout-go v0.3.4