diff --git a/data/transaction/apiTransactionResult.go b/data/transaction/apiTransactionResult.go
index 17e2d5b9e..ca9671b10 100644
--- a/data/transaction/apiTransactionResult.go
+++ b/data/transaction/apiTransactionResult.go
@@ -117,10 +117,11 @@ type ApiLogs struct {
 
 // Events represents the events generated by a transaction with changed fields' types in order to make it friendly for API's json
 type Events struct {
-	Address    string   `json:"address"`
-	Identifier string   `json:"identifier"`
-	Topics     [][]byte `json:"topics"`
-	Data       []byte   `json:"data"`
+	Address        string   `json:"address"`
+	Identifier     string   `json:"identifier"`
+	Topics         [][]byte `json:"topics"`
+	Data           []byte   `json:"data"`
+	AdditionalData [][]byte `json:"additionalData"`
 }
 
 // CostResponse is structure used to return the transaction cost in gas units
diff --git a/data/transaction/log.pb.go b/data/transaction/log.pb.go
index aa5758b07..0f0b729e8 100644
--- a/data/transaction/log.pb.go
+++ b/data/transaction/log.pb.go
@@ -28,10 +28,11 @@ const _ = proto.GoGoProtoPackageIsVersion3 // please upgrade the proto package
 
 // Event holds all the data needed for an event structure
 type Event struct {
-	Address    []byte   `protobuf:"bytes,1,opt,name=Address,proto3" json:"address"`
-	Identifier []byte   `protobuf:"bytes,2,opt,name=Identifier,proto3" json:"identifier"`
-	Topics     [][]byte `protobuf:"bytes,3,rep,name=Topics,proto3" json:"topics"`
-	Data       []byte   `protobuf:"bytes,4,opt,name=Data,proto3" json:"data"`
+	Address        []byte   `protobuf:"bytes,1,opt,name=Address,proto3" json:"address"`
+	Identifier     []byte   `protobuf:"bytes,2,opt,name=Identifier,proto3" json:"identifier"`
+	Topics         [][]byte `protobuf:"bytes,3,rep,name=Topics,proto3" json:"topics"`
+	Data           []byte   `protobuf:"bytes,4,opt,name=Data,proto3" json:"data"`
+	AdditionalData [][]byte `protobuf:"bytes,5,rep,name=AdditionalData,proto3" json:"additionalData"`
 }
 
 func (m *Event) Reset()      { *m = Event{} }
@@ -90,6 +91,13 @@ func (m *Event) GetData() []byte {
 	return nil
 }
 
+func (m *Event) GetAdditionalData() [][]byte {
+	if m != nil {
+		return m.AdditionalData
+	}
+	return nil
+}
+
 // Log holds all the data needed for a log structure
 type Log struct {
 	Address []byte   `protobuf:"bytes,1,opt,name=Address,proto3" json:"address"`
@@ -146,28 +154,28 @@ func init() {
 func init() { proto.RegisterFile("log.proto", fileDescriptor_a153da538f858886) }
 
 var fileDescriptor_a153da538f858886 = []byte{
-	// 336 bytes of a gzipped FileDescriptorProto
+	// 327 bytes of a gzipped FileDescriptorProto
 	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x8c, 0x90, 0x31, 0x4f, 0xc2, 0x40,
-	0x14, 0xc7, 0x7b, 0x14, 0x8a, 0x1e, 0xc4, 0xa1, 0x53, 0x63, 0xcc, 0x2b, 0x21, 0x31, 0x61, 0x69,
-	0x6b, 0x74, 0x74, 0x12, 0x75, 0x30, 0x71, 0x6a, 0x9c, 0x1c, 0x4c, 0x8e, 0xf6, 0x28, 0x97, 0x40,
-	0x8f, 0xb4, 0x07, 0x61, 0x31, 0xf1, 0x23, 0xf8, 0x11, 0x1c, 0xfd, 0x28, 0x8e, 0x8c, 0x4c, 0x8d,
-	0x1c, 0x8b, 0xe9, 0xc4, 0x47, 0x30, 0xbe, 0xa2, 0x61, 0x74, 0xba, 0xf7, 0x7e, 0xff, 0xff, 0xdd,
-	0xbd, 0xff, 0xa3, 0x87, 0x63, 0x99, 0xf8, 0xd3, 0x4c, 0x2a, 0x69, 0x37, 0xf0, 0x38, 0xf6, 0x12,
-	0xa1, 0x46, 0xb3, 0x81, 0x1f, 0xc9, 0x49, 0x90, 0xc8, 0x44, 0x06, 0x88, 0x07, 0xb3, 0x21, 0x76,
-	0xd8, 0x60, 0x55, 0xdd, 0xea, 0xbe, 0x11, 0xda, 0xb8, 0x9d, 0xf3, 0x54, 0xd9, 0xa7, 0xb4, 0x79,
-	0x15, 0xc7, 0x19, 0xcf, 0x73, 0x87, 0x74, 0x48, 0xaf, 0xdd, 0x6f, 0x95, 0x85, 0xdb, 0x64, 0x15,
-	0x0a, 0x7f, 0x35, 0xdb, 0xa7, 0xf4, 0x2e, 0xe6, 0xa9, 0x12, 0x43, 0xc1, 0x33, 0xa7, 0x86, 0xce,
-	0xa3, 0xb2, 0x70, 0xa9, 0xf8, 0xa3, 0xe1, 0x9e, 0xc3, 0xee, 0x52, 0xeb, 0x41, 0x4e, 0x45, 0x94,
-	0x3b, 0x66, 0xc7, 0xec, 0xb5, 0xfb, 0xb4, 0x2c, 0x5c, 0x4b, 0x21, 0x09, 0x77, 0x8a, 0x7d, 0x42,
-	0xeb, 0x37, 0x4c, 0x31, 0xa7, 0x8e, 0xaf, 0x1d, 0x94, 0x85, 0x5b, 0x8f, 0x99, 0x62, 0x21, 0xd2,
-	0xee, 0x13, 0x35, 0xef, 0x65, 0xf2, 0xdf, 0xf9, 0xce, 0xa8, 0x85, 0x79, 0x72, 0xa7, 0xd6, 0x31,
-	0x7b, 0xad, 0xf3, 0x76, 0x15, 0xd4, 0x47, 0x58, 0xfd, 0xce, 0x51, 0x0f, 0x77, 0xbe, 0xfe, 0xf3,
-	0x72, 0x0d, 0xc6, 0x6a, 0x0d, 0xc6, 0x76, 0x0d, 0xe4, 0x45, 0x03, 0x79, 0xd7, 0x40, 0x3e, 0x34,
-	0x90, 0xa5, 0x06, 0xb2, 0xd2, 0x40, 0x3e, 0x35, 0x90, 0x2f, 0x0d, 0xc6, 0x56, 0x03, 0x79, 0xdd,
-	0x80, 0xb1, 0xdc, 0x80, 0xb1, 0xda, 0x80, 0xf1, 0x78, 0xbd, 0xb7, 0xeb, 0xc9, 0x6c, 0xac, 0xc4,
-	0x9c, 0x67, 0xf9, 0x22, 0x98, 0x2c, 0xbc, 0x68, 0xc4, 0x44, 0xea, 0x45, 0x32, 0xe3, 0x5e, 0x22,
-	0x83, 0x9f, 0x30, 0x81, 0xca, 0x58, 0x9a, 0xb3, 0x48, 0x09, 0x99, 0x5e, 0xee, 0xd5, 0x03, 0x0b,
-	0xe7, 0xbb, 0xf8, 0x0e, 0x00, 0x00, 0xff, 0xff, 0xab, 0x45, 0xee, 0x02, 0xcb, 0x01, 0x00, 0x00,
+	0x14, 0xc7, 0x7b, 0x14, 0x8a, 0x3e, 0x08, 0xc3, 0x4d, 0x8d, 0x31, 0xaf, 0x84, 0xc4, 0x84, 0xc5,
+	0x62, 0x74, 0x73, 0x83, 0xc8, 0x60, 0xe2, 0xd4, 0x38, 0x39, 0x98, 0x1c, 0xb4, 0xd4, 0x4b, 0xb0,
+	0x47, 0xda, 0xc3, 0xd9, 0x8f, 0xe0, 0xc7, 0xf0, 0xa3, 0x38, 0x32, 0x32, 0x98, 0x46, 0xae, 0x8b,
+	0xe9, 0xc4, 0x47, 0x30, 0xbe, 0xa2, 0x51, 0x27, 0xa7, 0xf6, 0xfd, 0xfe, 0xbf, 0x7b, 0xf7, 0xee,
+	0xc1, 0xfe, 0x5c, 0xc5, 0xfe, 0x22, 0x55, 0x5a, 0xf1, 0x06, 0x7d, 0x0e, 0x8e, 0x63, 0xa9, 0xef,
+	0x96, 0x13, 0x7f, 0xaa, 0xee, 0x07, 0xb1, 0x8a, 0xd5, 0x80, 0xf0, 0x64, 0x39, 0xa3, 0x8a, 0x0a,
+	0xfa, 0xab, 0x4e, 0xf5, 0x5e, 0x19, 0x34, 0xc6, 0x0f, 0x51, 0xa2, 0xf9, 0x11, 0x34, 0x87, 0x61,
+	0x98, 0x46, 0x59, 0xe6, 0xb2, 0x2e, 0xeb, 0xb7, 0x47, 0xad, 0x32, 0xf7, 0x9a, 0xa2, 0x42, 0xc1,
+	0x57, 0xc6, 0x7d, 0x80, 0xcb, 0x30, 0x4a, 0xb4, 0x9c, 0xc9, 0x28, 0x75, 0x6b, 0x64, 0x76, 0xca,
+	0xdc, 0x03, 0xf9, 0x4d, 0x83, 0x1f, 0x06, 0xef, 0x81, 0x73, 0xad, 0x16, 0x72, 0x9a, 0xb9, 0x76,
+	0xd7, 0xee, 0xb7, 0x47, 0x50, 0xe6, 0x9e, 0xa3, 0x89, 0x04, 0xbb, 0x84, 0x1f, 0x42, 0xfd, 0x42,
+	0x68, 0xe1, 0xd6, 0xa9, 0xdb, 0x5e, 0x99, 0x7b, 0xf5, 0x50, 0x68, 0x11, 0x10, 0xe5, 0xe7, 0xd0,
+	0x19, 0x86, 0xa1, 0xd4, 0x52, 0x25, 0x62, 0x4e, 0x5e, 0x83, 0x3a, 0xf1, 0x32, 0xf7, 0x3a, 0xe2,
+	0x57, 0x12, 0xfc, 0x31, 0x7b, 0xb7, 0x60, 0x5f, 0xa9, 0xf8, 0xbf, 0x6f, 0x3b, 0x01, 0x87, 0x76,
+	0x91, 0xb9, 0xb5, 0xae, 0xdd, 0x6f, 0x9d, 0xb6, 0xab, 0x25, 0xf9, 0x04, 0xab, 0xc9, 0x23, 0xca,
+	0x83, 0x9d, 0x37, 0x1a, 0xaf, 0x36, 0x68, 0xad, 0x37, 0x68, 0x6d, 0x37, 0xc8, 0x1e, 0x0d, 0xb2,
+	0x67, 0x83, 0xec, 0xc5, 0x20, 0x5b, 0x19, 0x64, 0x6b, 0x83, 0xec, 0xcd, 0x20, 0x7b, 0x37, 0x68,
+	0x6d, 0x0d, 0xb2, 0xa7, 0x02, 0xad, 0x55, 0x81, 0xd6, 0xba, 0x40, 0xeb, 0xa6, 0xa5, 0x53, 0x91,
+	0x64, 0x62, 0xfa, 0x39, 0xec, 0xc4, 0xa1, 0x7b, 0xce, 0x3e, 0x02, 0x00, 0x00, 0xff, 0xff, 0xff,
+	0xf2, 0x5d, 0xce, 0xcf, 0x01, 0x00, 0x00,
 }
 
 func (this *Event) Equal(that interface{}) bool {
@@ -206,6 +214,14 @@ func (this *Event) Equal(that interface{}) bool {
 	if !bytes.Equal(this.Data, that1.Data) {
 		return false
 	}
+	if len(this.AdditionalData) != len(that1.AdditionalData) {
+		return false
+	}
+	for i := range this.AdditionalData {
+		if !bytes.Equal(this.AdditionalData[i], that1.AdditionalData[i]) {
+			return false
+		}
+	}
 	return true
 }
 func (this *Log) Equal(that interface{}) bool {
@@ -244,12 +260,13 @@ func (this *Event) GoString() string {
 	if this == nil {
 		return "nil"
 	}
-	s := make([]string, 0, 8)
+	s := make([]string, 0, 9)
 	s = append(s, "&transaction.Event{")
 	s = append(s, "Address: "+fmt.Sprintf("%#v", this.Address)+",\n")
 	s = append(s, "Identifier: "+fmt.Sprintf("%#v", this.Identifier)+",\n")
 	s = append(s, "Topics: "+fmt.Sprintf("%#v", this.Topics)+",\n")
 	s = append(s, "Data: "+fmt.Sprintf("%#v", this.Data)+",\n")
+	s = append(s, "AdditionalData: "+fmt.Sprintf("%#v", this.AdditionalData)+",\n")
 	s = append(s, "}")
 	return strings.Join(s, "")
 }
@@ -294,6 +311,15 @@ func (m *Event) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 	_ = i
 	var l int
 	_ = l
+	if len(m.AdditionalData) > 0 {
+		for iNdEx := len(m.AdditionalData) - 1; iNdEx >= 0; iNdEx-- {
+			i -= len(m.AdditionalData[iNdEx])
+			copy(dAtA[i:], m.AdditionalData[iNdEx])
+			i = encodeVarintLog(dAtA, i, uint64(len(m.AdditionalData[iNdEx])))
+			i--
+			dAtA[i] = 0x2a
+		}
+	}
 	if len(m.Data) > 0 {
 		i -= len(m.Data)
 		copy(dAtA[i:], m.Data)
@@ -406,6 +432,12 @@ func (m *Event) Size() (n int) {
 	if l > 0 {
 		n += 1 + l + sovLog(uint64(l))
 	}
+	if len(m.AdditionalData) > 0 {
+		for _, b := range m.AdditionalData {
+			l = len(b)
+			n += 1 + l + sovLog(uint64(l))
+		}
+	}
 	return n
 }
 
@@ -443,6 +475,7 @@ func (this *Event) String() string {
 		`Identifier:` + fmt.Sprintf("%v", this.Identifier) + `,`,
 		`Topics:` + fmt.Sprintf("%v", this.Topics) + `,`,
 		`Data:` + fmt.Sprintf("%v", this.Data) + `,`,
+		`AdditionalData:` + fmt.Sprintf("%v", this.AdditionalData) + `,`,
 		`}`,
 	}, "")
 	return s
@@ -634,6 +667,38 @@ func (m *Event) Unmarshal(dAtA []byte) error {
 				m.Data = []byte{}
 			}
 			iNdEx = postIndex
+		case 5:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field AdditionalData", wireType)
+			}
+			var byteLen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowLog
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				byteLen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if byteLen < 0 {
+				return ErrInvalidLengthLog
+			}
+			postIndex := iNdEx + byteLen
+			if postIndex < 0 {
+				return ErrInvalidLengthLog
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.AdditionalData = append(m.AdditionalData, make([]byte, postIndex-iNdEx))
+			copy(m.AdditionalData[len(m.AdditionalData)-1], dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
 		default:
 			iNdEx = preIndex
 			skippy, err := skipLog(dAtA[iNdEx:])
diff --git a/data/transaction/log.proto b/data/transaction/log.proto
index 55f9104b0..89ec91264 100644
--- a/data/transaction/log.proto
+++ b/data/transaction/log.proto
@@ -10,10 +10,11 @@ import "github.com/gogo/protobuf/gogoproto/gogo.proto";
 
 // Event holds all the data needed for an event structure
 message Event {
-    bytes Address          = 1 [(gogoproto.jsontag) = "address"];
-    bytes Identifier       = 2 [(gogoproto.jsontag) = "identifier"];
-    repeated bytes Topics  = 3 [(gogoproto.jsontag) = "topics"];
-    bytes Data             = 4 [(gogoproto.jsontag) = "data"];
+    bytes Address                   = 1 [(gogoproto.jsontag) = "address"];
+    bytes Identifier                = 2 [(gogoproto.jsontag) = "identifier"];
+    repeated bytes Topics           = 3 [(gogoproto.jsontag) = "topics"];
+    bytes Data                      = 4 [(gogoproto.jsontag) = "data"];
+    repeated bytes AdditionalData   = 5 [(gogoproto.jsontag) = "additionalData"];
 }
 
 // Log holds all the data needed for a log structure
diff --git a/data/vm/vmOutputApi.go b/data/vm/vmOutputApi.go
index 68c277b42..f3428b4d9 100644
--- a/data/vm/vmOutputApi.go
+++ b/data/vm/vmOutputApi.go
@@ -49,10 +49,11 @@ type OutputTransferApi struct {
 
 // LogEntryApi is a wrapper over vmcommon's LogEntry
 type LogEntryApi struct {
-	Identifier []byte   `json:"identifier"`
-	Address    string   `json:"address"`
-	Topics     [][]byte `json:"topics"`
-	Data       []byte   `json:"data"`
+	Identifier     []byte   `json:"identifier"`
+	Address        string   `json:"address"`
+	Topics         [][]byte `json:"topics"`
+	Data           []byte   `json:"data"`
+	AdditionalData [][]byte `json:"additionalData"`
 }
 
 // GetFirstReturnData is a helper function that returns the first ReturnData of VMOutput, interpreted as specified.