diff --git a/protos/hub/hub.pb.go b/protos/hub/hub.pb.go
index f6639a6..f0c307f 100644
--- a/protos/hub/hub.pb.go
+++ b/protos/hub/hub.pb.go
@@ -127,7 +127,7 @@ func (*SettingsReq) XXX_MessageName() string {
 type SettingsResp struct {
 	Code                 ResponseCode  `protobuf:"varint,1,opt,name=code,proto3,enum=hub.ResponseCode" json:"code,omitempty" pg:"code"`
 	Message              string        `protobuf:"bytes,2,opt,name=message,proto3" json:"message,omitempty" pg:"message"`
-	ResponseTime         *time.Time    `protobuf:"bytes,3,opt,name=response_time,json=responseTime,proto3,stdtime" json:"response_time,omitempty" pg:"response_time"`
+	ResponseTime         time.Time     `protobuf:"bytes,3,opt,name=response_time,json=responseTime,proto3,stdtime" json:"response_time" pg:"response_time"`
 	SettingsData         *SettingsData `protobuf:"bytes,4,opt,name=settings_data,json=settingsData,proto3" json:"settings_data,omitempty" pg:"settings_data"`
 	XXX_NoUnkeyedLiteral struct{}      `json:"-" pg:"-"`
 	XXX_unrecognized     []byte        `json:"-" pg:"-"`
@@ -181,11 +181,11 @@ func (m *SettingsResp) GetMessage() string {
 	return ""
 }
 
-func (m *SettingsResp) GetResponseTime() *time.Time {
+func (m *SettingsResp) GetResponseTime() time.Time {
 	if m != nil {
 		return m.ResponseTime
 	}
-	return nil
+	return time.Time{}
 }
 
 func (m *SettingsResp) GetSettingsData() *SettingsData {
@@ -347,7 +347,7 @@ type HostsResp struct {
 	Hosts                *HostsData   `protobuf:"bytes,3,opt,name=hosts,proto3" json:"hosts,omitempty" pg:"hosts"`
 	RespSize             int32        `protobuf:"varint,4,opt,name=resp_size,json=respSize,proto3" json:"resp_size,omitempty" pg:"resp_size"`
 	Mode                 string       `protobuf:"bytes,5,opt,name=mode,proto3" json:"mode,omitempty" pg:"mode"`
-	ResponseTime         *time.Time   `protobuf:"bytes,6,opt,name=response_time,json=responseTime,proto3,stdtime" json:"response_time,omitempty" pg:"response_time"`
+	ResponseTime         time.Time    `protobuf:"bytes,6,opt,name=response_time,json=responseTime,proto3,stdtime" json:"response_time" pg:"response_time"`
 	XXX_NoUnkeyedLiteral struct{}     `json:"-" pg:"-"`
 	XXX_unrecognized     []byte       `json:"-" pg:"-"`
 	XXX_sizecache        int32        `json:"-" pg:"-"`
@@ -421,11 +421,11 @@ func (m *HostsResp) GetMode() string {
 	return ""
 }
 
-func (m *HostsResp) GetResponseTime() *time.Time {
+func (m *HostsResp) GetResponseTime() time.Time {
 	if m != nil {
 		return m.ResponseTime
 	}
-	return nil
+	return time.Time{}
 }
 
 func (*HostsResp) XXX_MessageName() string {
@@ -485,8 +485,8 @@ func (*HostsData) XXX_MessageName() string {
 
 type Host struct {
 	NodeId               string          `protobuf:"bytes,1,opt,name=node_id,json=nodeId,proto3" json:"node_id,omitempty" pg:"node_id"`
-	TimeCreate           *time.Time      `protobuf:"bytes,2,opt,name=time_create,json=timeCreate,proto3,stdtime" json:"time_create,omitempty" pg:"time_create"`
-	TimeUpdate           *time.Time      `protobuf:"bytes,3,opt,name=time_update,json=timeUpdate,proto3,stdtime" json:"time_update,omitempty" pg:"time_update"`
+	TimeCreate           time.Time       `protobuf:"bytes,2,opt,name=time_create,json=timeCreate,proto3,stdtime" json:"time_create" pg:"time_create"`
+	TimeUpdate           time.Time       `protobuf:"bytes,3,opt,name=time_update,json=timeUpdate,proto3,stdtime" json:"time_update" pg:"time_update"`
 	NodeIp               string          `protobuf:"bytes,4,opt,name=node_ip,json=nodeIp,proto3" json:"node_ip,omitempty" pg:"node_ip"`
 	Region               string          `protobuf:"bytes,5,opt,name=region,proto3" json:"region,omitempty" pg:"region"`
 	BtfsVersion          string          `protobuf:"bytes,6,opt,name=btfs_version,json=btfsVersion,proto3" json:"btfs_version,omitempty" pg:"btfs_version"`
@@ -548,18 +548,18 @@ func (m *Host) GetNodeId() string {
 	return ""
 }
 
-func (m *Host) GetTimeCreate() *time.Time {
+func (m *Host) GetTimeCreate() time.Time {
 	if m != nil {
 		return m.TimeCreate
 	}
-	return nil
+	return time.Time{}
 }
 
-func (m *Host) GetTimeUpdate() *time.Time {
+func (m *Host) GetTimeUpdate() time.Time {
 	if m != nil {
 		return m.TimeUpdate
 	}
-	return nil
+	return time.Time{}
 }
 
 func (m *Host) GetNodeIp() string {
@@ -984,77 +984,77 @@ func init() { proto.RegisterFile("protos/hub/hub.proto", fileDescriptor_c704b599
 func init() { golang_proto.RegisterFile("protos/hub/hub.proto", fileDescriptor_c704b5990190a69f) }
 
 var fileDescriptor_c704b5990190a69f = []byte{
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+	0xf6, 0x31, 0xb5, 0x3e, 0x8f, 0xea, 0xc5, 0x07, 0xb1, 0x13, 0xcb, 0x25, 0xcd, 0x7c, 0xdb, 0xea,
+	0x96, 0x12, 0xb9, 0x91, 0xd2, 0xd6, 0xdb, 0x02, 0xac, 0x19, 0x9b, 0xfe, 0x1f, 0x36, 0x3c, 0xe9,
+	0x08, 0x3b, 0xb9, 0xd9, 0x75, 0x63, 0x1e, 0x3a, 0x74, 0x08, 0x16, 0xf6, 0x7b, 0x12, 0x08, 0xae,
+	0xc3, 0xfb, 0xf8, 0xa7, 0xc2, 0xc0, 0x10, 0x07, 0xc8, 0x4b, 0xd2, 0x2c, 0x7d, 0xc7, 0xa4, 0xc9,
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+	0x20, 0x66, 0xae, 0xf4, 0xa2, 0x7b, 0x8d, 0x2c, 0xfa, 0x31, 0x94, 0xc7, 0x7a, 0xaa, 0xec, 0x2b,
+	0x11, 0x28, 0xe3, 0x5d, 0x47, 0xaf, 0x65, 0xb0, 0x17, 0x21, 0x44, 0x1f, 0x41, 0x41, 0x4d, 0x64,
+	0x20, 0xea, 0x1b, 0x4d, 0xd2, 0xce, 0xb1, 0xd0, 0xa0, 0x3b, 0x60, 0x5d, 0x08, 0x1e, 0x68, 0x7b,
+	0x2c, 0xb8, 0x56, 0xf5, 0x62, 0x93, 0xb4, 0xf3, 0x0c, 0x10, 0xea, 0x1b, 0xc4, 0xfc, 0xc7, 0xa5,
+	0x8f, 0xcd, 0x2a, 0x21, 0x2f, 0xb2, 0x68, 0x0d, 0xf2, 0xe6, 0xe1, 0x00, 0x12, 0xcc, 0x91, 0x36,
+	0x00, 0x02, 0xe1, 0x2f, 0x35, 0xd7, 0x46, 0x81, 0x85, 0xd1, 0x19, 0x84, 0x7e, 0x04, 0xb0, 0xf4,
+	0xe7, 0x92, 0x3b, 0x36, 0xbf, 0x9a, 0xd5, 0xcb, 0xe8, 0x2f, 0x85, 0x48, 0xef, 0x6a, 0x96, 0x71,
+	0x5f, 0xf1, 0xa0, 0x5e, 0xc9, 0xba, 0x5f, 0xf0, 0xc0, 0x54, 0xe8, 0xc8, 0x57, 0x5e, 0xc2, 0xaf,
+	0x62, 0x80, 0x15, 0x63, 0x26, 0x43, 0x36, 0xc4, 0xe4, 0xd8, 0x5c, 0x0d, 0x31, 0x59, 0x9e, 0x40,
+	0x71, 0x2e, 0x27, 0xa1, 0xc2, 0x1a, 0x36, 0xa7, 0x82, 0x8f, 0xe5, 0x28, 0x02, 0x59, 0xe2, 0xa6,
+	0xcf, 0xa0, 0x1c, 0x4f, 0x02, 0xd7, 0x9b, 0xca, 0xfa, 0x16, 0x86, 0xd7, 0xc2, 0x69, 0x15, 0x3a,
+	0x0e, 0xbd, 0xa9, 0x64, 0x96, 0x4a, 0x0d, 0xfa, 0x15, 0xa4, 0x5f, 0x7f, 0x48, 0xa3, 0x48, 0xa3,
+	0x48, 0xeb, 0xc7, 0x2e, 0x24, 0x56, 0xc6, 0x59, 0x93, 0x7e, 0x03, 0x99, 0x71, 0x10, 0x72, 0x1f,
+	0x22, 0xf7, 0x21, 0x72, 0x07, 0x89, 0x0f, 0xc9, 0xd5, 0xc9, 0x8a, 0xdd, 0xea, 0x40, 0x31, 0xae,
+	0xc1, 0xb4, 0x66, 0xce, 0x75, 0x34, 0x11, 0xcd, 0x11, 0x11, 0xe9, 0x45, 0x53, 0xcf, 0x1c, 0x5b,
+	0xbf, 0x11, 0xb0, 0x32, 0x55, 0x98, 0x77, 0x10, 0x57, 0x3b, 0xe1, 0x3e, 0x72, 0x73, 0x0c, 0x22,
+	0x68, 0xc0, 0x7d, 0x73, 0xb9, 0x71, 0xc0, 0x5c, 0x4c, 0x35, 0xe6, 0xca, 0x25, 0xc5, 0x1f, 0x89,
+	0xa9, 0xce, 0xce, 0xce, 0x85, 0xeb, 0xa5, 0xeb, 0x22, 0x9f, 0xcc, 0xce, 0x63, 0xd7, 0xc3, 0x55,
+	0x90, 0x99, 0xe0, 0x5c, 0x5d, 0x86, 0x73, 0x19, 0x5f, 0x7a, 0x2e, 0x99, 0xe0, 0x3d, 0x75, 0x89,
+	0x43, 0xf9, 0xdd, 0x69, 0x2f, 0x94, 0xc6, 0xd7, 0x9f, 0x5b, 0x9d, 0xf6, 0x43, 0xa5, 0x5b, 0x6f,
+	0x08, 0x54, 0x56, 0x2e, 0xf9, 0xbe, 0x29, 0x1d, 0xd6, 0x76, 0x77, 0x4a, 0xaf, 0x2c, 0x8a, 0x54,
+	0x54, 0x58, 0x66, 0xba, 0x28, 0x12, 0x59, 0xf7, 0x2c, 0x16, 0x23, 0x2c, 0x7f, 0x27, 0x3e, 0x91,
+	0xf6, 0x23, 0x81, 0xea, 0x6a, 0x0f, 0xef, 0x5d, 0x0c, 0xa1, 0xb8, 0xbb, 0x8b, 0xc1, 0x94, 0x91,
+	0x09, 0x9d, 0x4b, 0x15, 0x37, 0x20, 0xf3, 0x0e, 0x8e, 0xcc, 0x80, 0x5b, 0x0d, 0x1c, 0x2f, 0x03,
+	0x2f, 0x92, 0x94, 0x09, 0xec, 0x2f, 0x03, 0xef, 0xe9, 0x04, 0xca, 0xd9, 0x95, 0x40, 0x2d, 0xd8,
+	0x18, 0x9d, 0x0f, 0x06, 0xc3, 0xd1, 0xa8, 0xf6, 0x80, 0x6e, 0xc3, 0xe3, 0xd1, 0xe1, 0xfe, 0xf7,
+	0xbd, 0xb3, 0x73, 0x36, 0xb4, 0xbf, 0x3b, 0x61, 0xc7, 0xbd, 0x33, 0x7b, 0xc8, 0xd8, 0x09, 0xab,
+	0x11, 0xfa, 0x01, 0xfc, 0x6f, 0x70, 0x72, 0x7c, 0x7a, 0x7e, 0x36, 0xb4, 0x7b, 0x7b, 0x7b, 0x6c,
+	0x38, 0x1a, 0x45, 0xae, 0x1c, 0xdd, 0x04, 0xeb, 0xe4, 0xec, 0x60, 0xc8, 0x22, 0xe0, 0x51, 0xf7,
+	0x5b, 0x28, 0xc6, 0x9b, 0x9b, 0x76, 0xc1, 0xda, 0x17, 0x3a, 0x31, 0x6b, 0x2b, 0x6b, 0x9f, 0x89,
+	0x97, 0xdb, 0x5b, 0x77, 0x10, 0xe5, 0x77, 0xbb, 0x50, 0xc0, 0x29, 0x6f, 0xbe, 0xdb, 0x7d, 0xa1,
+	0xc3, 0x73, 0x25, 0xdd, 0x46, 0x86, 0x56, 0xcd, 0x9a, 0xca, 0xef, 0x3f, 0xbf, 0xbe, 0x69, 0x90,
+	0x5f, 0x6e, 0x1a, 0xe4, 0x8f, 0x9b, 0x06, 0x79, 0x73, 0xdb, 0x20, 0x3f, 0xdf, 0x36, 0xc8, 0xf5,
+	0x6d, 0x83, 0x80, 0xe5, 0xca, 0x8e, 0x99, 0x88, 0x86, 0xd0, 0x2f, 0x1e, 0x2c, 0xc7, 0xa7, 0x66,
+	0x1e, 0x9f, 0x92, 0x1f, 0xcc, 0xef, 0xb8, 0xf1, 0x3a, 0x4e, 0xe7, 0x67, 0x7f, 0x07, 0x00, 0x00,
+	0xff, 0xff, 0x6c, 0x10, 0x7f, 0x88, 0xeb, 0x09, 0x00, 0x00,
 }
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -1284,16 +1284,14 @@ func (m *SettingsResp) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 		i--
 		dAtA[i] = 0x22
 	}
-	if m.ResponseTime != nil {
-		n2, err2 := github_com_tron_us_protobuf_types.StdTimeMarshalTo(*m.ResponseTime, dAtA[i-github_com_tron_us_protobuf_types.SizeOfStdTime(*m.ResponseTime):])
-		if err2 != nil {
-			return 0, err2
-		}
-		i -= n2
-		i = encodeVarintHub(dAtA, i, uint64(n2))
-		i--
-		dAtA[i] = 0x1a
+	n2, err2 := github_com_tron_us_protobuf_types.StdTimeMarshalTo(m.ResponseTime, dAtA[i-github_com_tron_us_protobuf_types.SizeOfStdTime(m.ResponseTime):])
+	if err2 != nil {
+		return 0, err2
 	}
+	i -= n2
+	i = encodeVarintHub(dAtA, i, uint64(n2))
+	i--
+	dAtA[i] = 0x1a
 	if len(m.Message) > 0 {
 		i -= len(m.Message)
 		copy(dAtA[i:], m.Message)
@@ -1429,16 +1427,14 @@ func (m *HostsResp) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 		i -= len(m.XXX_unrecognized)
 		copy(dAtA[i:], m.XXX_unrecognized)
 	}
-	if m.ResponseTime != nil {
-		n3, err3 := github_com_tron_us_protobuf_types.StdTimeMarshalTo(*m.ResponseTime, dAtA[i-github_com_tron_us_protobuf_types.SizeOfStdTime(*m.ResponseTime):])
-		if err3 != nil {
-			return 0, err3
-		}
-		i -= n3
-		i = encodeVarintHub(dAtA, i, uint64(n3))
-		i--
-		dAtA[i] = 0x32
+	n3, err3 := github_com_tron_us_protobuf_types.StdTimeMarshalTo(m.ResponseTime, dAtA[i-github_com_tron_us_protobuf_types.SizeOfStdTime(m.ResponseTime):])
+	if err3 != nil {
+		return 0, err3
 	}
+	i -= n3
+	i = encodeVarintHub(dAtA, i, uint64(n3))
+	i--
+	dAtA[i] = 0x32
 	if len(m.Mode) > 0 {
 		i -= len(m.Mode)
 		copy(dAtA[i:], m.Mode)
@@ -1672,26 +1668,22 @@ func (m *Host) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 		i--
 		dAtA[i] = 0x22
 	}
-	if m.TimeUpdate != nil {
-		n9, err9 := github_com_tron_us_protobuf_types.StdTimeMarshalTo(*m.TimeUpdate, dAtA[i-github_com_tron_us_protobuf_types.SizeOfStdTime(*m.TimeUpdate):])
-		if err9 != nil {
-			return 0, err9
-		}
-		i -= n9
-		i = encodeVarintHub(dAtA, i, uint64(n9))
-		i--
-		dAtA[i] = 0x1a
-	}
-	if m.TimeCreate != nil {
-		n10, err10 := github_com_tron_us_protobuf_types.StdTimeMarshalTo(*m.TimeCreate, dAtA[i-github_com_tron_us_protobuf_types.SizeOfStdTime(*m.TimeCreate):])
-		if err10 != nil {
-			return 0, err10
-		}
-		i -= n10
-		i = encodeVarintHub(dAtA, i, uint64(n10))
-		i--
-		dAtA[i] = 0x12
-	}
+	n9, err9 := github_com_tron_us_protobuf_types.StdTimeMarshalTo(m.TimeUpdate, dAtA[i-github_com_tron_us_protobuf_types.SizeOfStdTime(m.TimeUpdate):])
+	if err9 != nil {
+		return 0, err9
+	}
+	i -= n9
+	i = encodeVarintHub(dAtA, i, uint64(n9))
+	i--
+	dAtA[i] = 0x1a
+	n10, err10 := github_com_tron_us_protobuf_types.StdTimeMarshalTo(m.TimeCreate, dAtA[i-github_com_tron_us_protobuf_types.SizeOfStdTime(m.TimeCreate):])
+	if err10 != nil {
+		return 0, err10
+	}
+	i -= n10
+	i = encodeVarintHub(dAtA, i, uint64(n10))
+	i--
+	dAtA[i] = 0x12
 	if len(m.NodeId) > 0 {
 		i -= len(m.NodeId)
 		copy(dAtA[i:], m.NodeId)
@@ -1930,10 +1922,8 @@ func (m *SettingsResp) Size() (n int) {
 	if l > 0 {
 		n += 1 + l + sovHub(uint64(l))
 	}
-	if m.ResponseTime != nil {
-		l = github_com_tron_us_protobuf_types.SizeOfStdTime(*m.ResponseTime)
-		n += 1 + l + sovHub(uint64(l))
-	}
+	l = github_com_tron_us_protobuf_types.SizeOfStdTime(m.ResponseTime)
+	n += 1 + l + sovHub(uint64(l))
 	if m.SettingsData != nil {
 		l = m.SettingsData.Size()
 		n += 1 + l + sovHub(uint64(l))
@@ -2014,10 +2004,8 @@ func (m *HostsResp) Size() (n int) {
 	if l > 0 {
 		n += 1 + l + sovHub(uint64(l))
 	}
-	if m.ResponseTime != nil {
-		l = github_com_tron_us_protobuf_types.SizeOfStdTime(*m.ResponseTime)
-		n += 1 + l + sovHub(uint64(l))
-	}
+	l = github_com_tron_us_protobuf_types.SizeOfStdTime(m.ResponseTime)
+	n += 1 + l + sovHub(uint64(l))
 	if m.XXX_unrecognized != nil {
 		n += len(m.XXX_unrecognized)
 	}
@@ -2052,14 +2040,10 @@ func (m *Host) Size() (n int) {
 	if l > 0 {
 		n += 1 + l + sovHub(uint64(l))
 	}
-	if m.TimeCreate != nil {
-		l = github_com_tron_us_protobuf_types.SizeOfStdTime(*m.TimeCreate)
-		n += 1 + l + sovHub(uint64(l))
-	}
-	if m.TimeUpdate != nil {
-		l = github_com_tron_us_protobuf_types.SizeOfStdTime(*m.TimeUpdate)
-		n += 1 + l + sovHub(uint64(l))
-	}
+	l = github_com_tron_us_protobuf_types.SizeOfStdTime(m.TimeCreate)
+	n += 1 + l + sovHub(uint64(l))
+	l = github_com_tron_us_protobuf_types.SizeOfStdTime(m.TimeUpdate)
+	n += 1 + l + sovHub(uint64(l))
 	l = len(m.NodeIp)
 	if l > 0 {
 		n += 1 + l + sovHub(uint64(l))
@@ -2428,10 +2412,7 @@ func (m *SettingsResp) Unmarshal(dAtA []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			if m.ResponseTime == nil {
-				m.ResponseTime = new(time.Time)
-			}
-			if err := github_com_tron_us_protobuf_types.StdTimeUnmarshal(m.ResponseTime, dAtA[iNdEx:postIndex]); err != nil {
+			if err := github_com_tron_us_protobuf_types.StdTimeUnmarshal(&m.ResponseTime, dAtA[iNdEx:postIndex]); err != nil {
 				return err
 			}
 			iNdEx = postIndex
@@ -2906,10 +2887,7 @@ func (m *HostsResp) Unmarshal(dAtA []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			if m.ResponseTime == nil {
-				m.ResponseTime = new(time.Time)
-			}
-			if err := github_com_tron_us_protobuf_types.StdTimeUnmarshal(m.ResponseTime, dAtA[iNdEx:postIndex]); err != nil {
+			if err := github_com_tron_us_protobuf_types.StdTimeUnmarshal(&m.ResponseTime, dAtA[iNdEx:postIndex]); err != nil {
 				return err
 			}
 			iNdEx = postIndex
@@ -3116,10 +3094,7 @@ func (m *Host) Unmarshal(dAtA []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			if m.TimeCreate == nil {
-				m.TimeCreate = new(time.Time)
-			}
-			if err := github_com_tron_us_protobuf_types.StdTimeUnmarshal(m.TimeCreate, dAtA[iNdEx:postIndex]); err != nil {
+			if err := github_com_tron_us_protobuf_types.StdTimeUnmarshal(&m.TimeCreate, dAtA[iNdEx:postIndex]); err != nil {
 				return err
 			}
 			iNdEx = postIndex
@@ -3152,10 +3127,7 @@ func (m *Host) Unmarshal(dAtA []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			if m.TimeUpdate == nil {
-				m.TimeUpdate = new(time.Time)
-			}
-			if err := github_com_tron_us_protobuf_types.StdTimeUnmarshal(m.TimeUpdate, dAtA[iNdEx:postIndex]); err != nil {
+			if err := github_com_tron_us_protobuf_types.StdTimeUnmarshal(&m.TimeUpdate, dAtA[iNdEx:postIndex]); err != nil {
 				return err
 			}
 			iNdEx = postIndex
diff --git a/protos/hub/hub.proto b/protos/hub/hub.proto
index 2ea5425..093125e 100644
--- a/protos/hub/hub.proto
+++ b/protos/hub/hub.proto
@@ -42,7 +42,10 @@ enum ResponseCode {
 message SettingsResp {
   ResponseCode code = 1;
   string message = 2;
-  google.protobuf.Timestamp response_time = 3 [(gogoproto.stdtime) = true];
+  google.protobuf.Timestamp response_time = 3 [
+    (gogoproto.nullable) = false,
+    (gogoproto.stdtime) = true
+  ];
   SettingsData settings_data = 4;
 }
 
@@ -65,7 +68,10 @@ message HostsResp {
   HostsData hosts = 3;
   int32 resp_size = 4;
   string mode = 5;
-  google.protobuf.Timestamp response_time = 6 [(gogoproto.stdtime) = true];
+  google.protobuf.Timestamp response_time = 6 [
+    (gogoproto.nullable) = false,
+    (gogoproto.stdtime) = true
+  ];
 }
 
 message HostsData {
@@ -74,8 +80,14 @@ message HostsData {
 
 message Host {
   string node_id = 1;
-  google.protobuf.Timestamp time_create = 2 [(gogoproto.stdtime) = true];
-  google.protobuf.Timestamp time_update = 3 [(gogoproto.stdtime) = true];
+  google.protobuf.Timestamp time_create = 2 [
+    (gogoproto.nullable) = false,
+    (gogoproto.stdtime) = true
+  ];
+  google.protobuf.Timestamp time_update = 3 [
+    (gogoproto.nullable) = false,
+    (gogoproto.stdtime) = true
+  ];
   string node_ip = 4;
   string region = 5;
   string btfs_version = 6;