diff --git a/.gitignore b/.gitignore
index 6d8ed26..12418f5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -36,3 +36,6 @@ yarn.lock
 node_modules
 
 logs/
+
+golangci-lint
+build
\ No newline at end of file
diff --git a/.golangci.yml b/.golangci.yml
index fa9697a..e7b2fda 100644
--- a/.golangci.yml
+++ b/.golangci.yml
@@ -34,49 +34,32 @@ linters:
 #    - stylecheck
 
 linters-settings:
-  gocritic:
-    # Which checks should be enabled; can't be combined with 'disabled-checks';
-    # See https://go-critic.github.io/overview#checks-overview
-    # To check which checks are enabled run `GL_DEBUG=gocritic ./build/bin/golangci-lint run`
-    # By default list of stable checks is used.
-    enabled-checks:
-      # - ruleguard
-      # - defaultCaseOrder
-
-    # Which checks should be disabled; can't be combined with 'enabled-checks'; default is empty
+  gocritic: # see https://golangci-lint.run/usage/linters/#gocritic and https://go-critic.github.io/overview#checks-overview
+    enabled-tags:
+      - performance
+      - diagnostic
+      - style
     disabled-checks:
-      - regexpMust
-      - appendAssign
-      #      - hugeParam
       - rangeValCopy
       - exitAfterDefer
       - elseif
       - dupBranchBody
       - assignOp
       - singleCaseSwitch
-      - unlambda
       - captLocal
       - commentFormatting
       - ifElseChain
+      - sprintfQuotedString
+      - commentedOutCode
+      - preferFprint
+
+      # style tag
       - importShadow
+      - emptyStringTest
       - paramTypeCombine
-      - builtinShadow
-      - typeUnparen
+      - unnamedResult
 
-    # Enable multiple checks by tags, run `GL_DEBUG=gocritic golangci-lint run` to see all tags and checks.
-    # Empty list by default. See https://github.com/go-critic/go-critic#usage -> section "Tags".
-    enabled-tags:
-      - performance
-      - diagnostic
-      - opinionated
-    disabled-tags:
-      - experimental
     settings:
-      # ruleguard:
-      #  rules: "rules.go"
-      hugeParam:
-        # size in bytes that makes the warning trigger (default 80)
-        sizeThreshold: 1000
       rangeExprCopy:
         # size in bytes that makes the warning trigger (default 512)
         sizeThreshold: 512
@@ -96,7 +79,7 @@ linters-settings:
     min-len: 2
     min-occurrences: 2
   gofmt:
-    auto-fix: false
+    simplify: false
 
 issues:
   exclude-rules:
diff --git a/build/bin/golangci-lint b/build/bin/golangci-lint
index 3f251c5..ce66cb9 100755
Binary files a/build/bin/golangci-lint and b/build/bin/golangci-lint differ
diff --git a/internal/erigon_node/bodies_download.go b/internal/erigon_node/bodies_download.go
index 1cc9f35..2bbb70b 100644
--- a/internal/erigon_node/bodies_download.go
+++ b/internal/erigon_node/bodies_download.go
@@ -10,10 +10,6 @@ import (
 )
 
 func (c *NodeClient) BodiesDownload(ctx context.Context, w http.ResponseWriter) {
-	/*snapshot := btree.NewG(16, func(a, b SnapshotItem) bool {
-		return a.Id < b.Id
-	})*/
-
 	var tick int64
 	sendEvery := time.NewTicker(1000 * time.Millisecond)
 	defer sendEvery.Stop()
diff --git a/internal/erigon_node/erigon_client.go b/internal/erigon_node/erigon_client.go
index 8789344..a06eafe 100644
--- a/internal/erigon_node/erigon_client.go
+++ b/internal/erigon_node/erigon_client.go
@@ -13,7 +13,7 @@ import (
 var _ Client = &NodeClient{}
 
 type NodeClient struct {
-	sync.Mutex
+	lock           sync.Mutex
 	requestId      uint64
 	requestChannel chan *NodeRequest
 	nodeId         string
@@ -27,10 +27,10 @@ func NewClient(nodeId string, requestChannel chan *NodeRequest) Client {
 }
 
 func (c *NodeClient) nextRequestId() string {
-	c.Lock()
+	c.lock.Lock()
 	id := c.requestId
 	c.requestId++
-	c.Unlock()
+	c.lock.Unlock()
 	return strconv.FormatUint(id, 10)
 }
 
diff --git a/internal/erigon_node/headers_download.go b/internal/erigon_node/headers_download.go
index f35ea74..422cf92 100644
--- a/internal/erigon_node/headers_download.go
+++ b/internal/erigon_node/headers_download.go
@@ -10,10 +10,6 @@ import (
 )
 
 func (c *NodeClient) HeadersDownload(ctx context.Context, w http.ResponseWriter) {
-	/*
-		snapshot := btree.NewG(16, func(a, b SnapshotItem) bool {
-			return a.Id < b.Id
-		})*/
 	var tick int64
 	sendEvery := time.NewTicker(1000 * time.Millisecond)
 	defer sendEvery.Stop()
diff --git a/internal/erigon_node/remote_db.go b/internal/erigon_node/remote_db.go
index 0b40732..b555366 100644
--- a/internal/erigon_node/remote_db.go
+++ b/internal/erigon_node/remote_db.go
@@ -74,9 +74,9 @@ func (r *results) UnmarshalJSON(json []byte) (err error) {
 
 		switch json[i] {
 		case byte('"'):
-			len, value := tostr(json[i:])
+			length, value := tostr(json[i:])
 
-			i += len
+			i += length
 
 			if result[ri], err = base64.URLEncoding.DecodeString(value); err != nil {
 				return err
@@ -161,7 +161,6 @@ func (rc *RemoteCursor) findFullDbPath(ctx context.Context, db string) (string,
 	if err != nil {
 		return "", err
 	}
-	// fmt.Println("lines: ", lines)
 
 	var dbPath string
 
diff --git a/internal/sessions/node.go b/internal/sessions/node.go
index bbd843c..f36fa04 100644
--- a/internal/sessions/node.go
+++ b/internal/sessions/node.go
@@ -28,7 +28,7 @@ type NodeInfo struct {
 
 // NodeSession corresponds to one Erigon node connected via "erigon support" bridge to an operator
 type NodeSession struct {
-	sync.Mutex
+	lock         sync.Mutex
 	Connected    bool
 	RemoteAddr   string
 	Client       erigon_node.Client
@@ -39,15 +39,15 @@ type NodeSession struct {
 }
 
 func (ns *NodeSession) Connect(remoteAddr string) {
-	ns.Lock()
-	defer ns.Unlock()
+	ns.lock.Lock()
+	defer ns.lock.Unlock()
 	ns.Connected = true
 	ns.RemoteAddr = remoteAddr
 }
 
 func (ns *NodeSession) Disconnect() {
-	ns.Lock()
-	defer ns.Unlock()
+	ns.lock.Lock()
+	defer ns.lock.Unlock()
 	ns.Connected = false
 }