diff --git a/Comment/comment.go b/Comment/comment.go
index 2e25622..99ae9de 100755
--- a/Comment/comment.go
+++ b/Comment/comment.go
@@ -96,7 +96,7 @@ func GetByLogin(login string) []Comment {
 
 func GetComment(commentId string) Comment {
 	ctx := storage.GetContext()
-	return storage.Get(ctx, commentId).(Comment)
+	return std.Deserialize(storage.Get(ctx, commentId).([]byte)).(Comment)
 }
 
 func GetCommentInPost(commentId string, postId string) Comment {
diff --git a/Post/post_contract.go b/Post/post_contract.go
index ff1e048..4755858 100755
--- a/Post/post_contract.go
+++ b/Post/post_contract.go
@@ -3,12 +3,12 @@ package Post
 import (
 	"github.com/nspcc-dev/neo-go/pkg/interop/iterator"
 	"github.com/nspcc-dev/neo-go/pkg/interop/native/std"
+	"github.com/nspcc-dev/neo-go/pkg/interop/runtime"
 	"github.com/nspcc-dev/neo-go/pkg/interop/storage"
 )
 
 type Post struct {
 	postName string
-	header   string
 	text     string
 	login    string
 	likes    int
@@ -40,8 +40,9 @@ func NewPost(login string, text string, postName string) {
 	storage.Put(ctx, post.id, std.Serialize(post))
 
 	updatePostIndex(login)
-	lastPostIndex := storage.Get(ctx, login+lastIndex).(string)
-	storage.Put(ctx, login+"_p_"+lastPostIndex, post.id)
+	lastPostIndex := storage.Get(ctx, login+lastIndex).(int)
+	storage.Put(ctx, login+"_p_"+std.Itoa10(lastPostIndex), post.id)
+	runtime.Log("Post created. Post id: " + post.id + "; User post id" + login + "_p_" + std.Itoa10(lastPostIndex))
 }
 
 func GetAllPosts() []Post {
@@ -50,8 +51,10 @@ func GetAllPosts() []Post {
 	it := storage.Find(ctx, "post", storage.ValuesOnly|storage.DeserializeValues)
 	for iterator.Next(it) {
 		post := iterator.Value(it).(Post)
+		runtime.Log(string(std.Serialize(post)))
 		posts = append(posts, post)
 	}
+
 	return posts
 }
 
@@ -68,11 +71,22 @@ func GetPost(postId string) Post {
 
 func GetAllPostsByUser(login string) []Post {
 	ctx := storage.GetReadOnlyContext()
-	var postsByUser []Post
-	i := 0
+	var postsByUser []Post = make([]Post, 0)
+	i := 1
 	n := getPostIndex(login)
-	for i < n {
-		post := storage.Get(ctx, login+"_p_"+std.Itoa10(i))
+	for i < n+1 {
+		post_key := storage.Get(ctx, login+"_p_"+std.Itoa10(i))
+		if post_key == nil {
+			panic("post key not found")
+		}
+
+		post_key = post_key.(string)
+
+		post := storage.Get(ctx, post_key)
+		if post == nil {
+			panic("post not found")
+		}
+
 		i++
 		postsByUser = append(postsByUser, std.Deserialize(post.([]byte)).(Post))
 	}
diff --git a/User/user.go b/User/user.go
index 6371303..d375812 100755
--- a/User/user.go
+++ b/User/user.go
@@ -21,7 +21,6 @@ const (
 
 func NewUser(name string, surname string, login string, password string, owner interop.Hash160) {
 	ctx := storage.GetContext()
-
 	existing_login := storage.Get(ctx, login)
 	if existing_login != nil {
 		panic("this login is taken by someone else")
@@ -38,7 +37,11 @@ func NewUser(name string, surname string, login string, password string, owner i
 	saveUser(ctx, login, user)
 }
 
-func GetUser(ctx storage.Context, login string) User {
+func GetUser(login string) User {
+	return getUserTst(storage.GetReadOnlyContext(), login)
+}
+
+func getUserTst(ctx storage.Context, login string) User {
 	data := storage.Get(ctx, login)
 
 	if data == nil {