Fix: tezgen types.Bytes

Author: aopoltorzhicky

tools/tezgen/types.go

@@ -19,12 +19,8 @@ type Bytes []byte
 
 // UnmarshalJSON -
 func (b *Bytes) UnmarshalJSON(data []byte) error {
-	var str string
-	if err := json.Unmarshal(data, &str); err != nil {
-		return err
-	}
-	byt, err := hex.DecodeString(str)
-	if err != nil {
+	byt := make([]byte, hex.DecodedLen(len(data)))
+	if _, err := hex.Decode(byt, data); err != nil {
 		return err
 	}
 	*b = make([]byte, 0)

tools/tezgen/types_test.go

@@ -0,0 +1,32 @@
+package tezgen
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestBytes_UnmarshalJSON(t *testing.T) {
+	tests := []struct {
+		name    string
+		data    []byte
+		want    []byte
+		wantErr bool
+	}{
+		{
+			name: "test 1",
+			data: []byte{0x31, 0x32, 0x33, 0x34},
+			want: []byte{0x12, 0x34},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			var b Bytes
+			if err := json.Unmarshal(tt.data, &b); (err != nil) != tt.wantErr {
+				t.Errorf("Bytes.UnmarshalJSON() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+			assert.Equal(t, tt.want, []byte(b))
+		})
+	}
+}