From 29f1e646edd71d59cddba5c3863449f24b57af96 Mon Sep 17 00:00:00 2001
From: Anna Shaleva <shaleva.ann@nspcc.ru>
Date: Mon, 6 Jul 2020 14:35:55 +0300
Subject: [PATCH] vm: fix stackitem serialisation

We're able to serialise Buffer stackitem, but can not deserealise it
which leads to errors. Fixed.
---
 pkg/vm/stackitem/serialization.go | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/pkg/vm/stackitem/serialization.go b/pkg/vm/stackitem/serialization.go
index 17b3dec95..b3b111a7d 100644
--- a/pkg/vm/stackitem/serialization.go
+++ b/pkg/vm/stackitem/serialization.go
@@ -2,6 +2,7 @@ package stackitem
 
 import (
 	"errors"
+	"fmt"
 	"math/big"
 
 	"github.com/nspcc-dev/neo-go/pkg/encoding/bigint"
@@ -96,7 +97,7 @@ func DecodeBinaryStackItem(r *io.BinReader) Item {
 	}
 
 	switch t {
-	case ByteArrayT:
+	case ByteArrayT, BufferT:
 		data := r.ReadVarBytes()
 		return NewByteArray(data)
 	case BooleanT:
@@ -132,7 +133,7 @@ func DecodeBinaryStackItem(r *io.BinReader) Item {
 	case AnyT:
 		return Null{}
 	default:
-		r.Err = errors.New("unknown type")
+		r.Err = fmt.Errorf("unknown type: %v", t)
 		return nil
 	}
 }