diff --git a/api/opinit/ophost/v1/types.pulsar.go b/api/opinit/ophost/v1/types.pulsar.go
index 3299e25..df05744 100644
--- a/api/opinit/ophost/v1/types.pulsar.go
+++ b/api/opinit/ophost/v1/types.pulsar.go
@@ -2362,6 +2362,7 @@ func (x *fastReflection_TokenPair) ProtoMethods() *protoiface.Methods {
 var (
 	md_Output                 protoreflect.MessageDescriptor
 	fd_Output_output_root     protoreflect.FieldDescriptor
+	fd_Output_l1_block_number protoreflect.FieldDescriptor
 	fd_Output_l1_block_time   protoreflect.FieldDescriptor
 	fd_Output_l2_block_number protoreflect.FieldDescriptor
 )
@@ -2370,6 +2371,7 @@ func init() {
 	file_opinit_ophost_v1_types_proto_init()
 	md_Output = File_opinit_ophost_v1_types_proto.Messages().ByName("Output")
 	fd_Output_output_root = md_Output.Fields().ByName("output_root")
+	fd_Output_l1_block_number = md_Output.Fields().ByName("l1_block_number")
 	fd_Output_l1_block_time = md_Output.Fields().ByName("l1_block_time")
 	fd_Output_l2_block_number = md_Output.Fields().ByName("l2_block_number")
 }
@@ -2445,6 +2447,12 @@ func (x *fastReflection_Output) Range(f func(protoreflect.FieldDescriptor, proto
 			return
 		}
 	}
+	if x.L1BlockNumber != uint64(0) {
+		value := protoreflect.ValueOfUint64(x.L1BlockNumber)
+		if !f(fd_Output_l1_block_number, value) {
+			return
+		}
+	}
 	if x.L1BlockTime != nil {
 		value := protoreflect.ValueOfMessage(x.L1BlockTime.ProtoReflect())
 		if !f(fd_Output_l1_block_time, value) {
@@ -2474,6 +2482,8 @@ func (x *fastReflection_Output) Has(fd protoreflect.FieldDescriptor) bool {
 	switch fd.FullName() {
 	case "opinit.ophost.v1.Output.output_root":
 		return len(x.OutputRoot) != 0
+	case "opinit.ophost.v1.Output.l1_block_number":
+		return x.L1BlockNumber != uint64(0)
 	case "opinit.ophost.v1.Output.l1_block_time":
 		return x.L1BlockTime != nil
 	case "opinit.ophost.v1.Output.l2_block_number":
@@ -2496,6 +2506,8 @@ func (x *fastReflection_Output) Clear(fd protoreflect.FieldDescriptor) {
 	switch fd.FullName() {
 	case "opinit.ophost.v1.Output.output_root":
 		x.OutputRoot = nil
+	case "opinit.ophost.v1.Output.l1_block_number":
+		x.L1BlockNumber = uint64(0)
 	case "opinit.ophost.v1.Output.l1_block_time":
 		x.L1BlockTime = nil
 	case "opinit.ophost.v1.Output.l2_block_number":
@@ -2519,6 +2531,9 @@ func (x *fastReflection_Output) Get(descriptor protoreflect.FieldDescriptor) pro
 	case "opinit.ophost.v1.Output.output_root":
 		value := x.OutputRoot
 		return protoreflect.ValueOfBytes(value)
+	case "opinit.ophost.v1.Output.l1_block_number":
+		value := x.L1BlockNumber
+		return protoreflect.ValueOfUint64(value)
 	case "opinit.ophost.v1.Output.l1_block_time":
 		value := x.L1BlockTime
 		return protoreflect.ValueOfMessage(value.ProtoReflect())
@@ -2547,6 +2562,8 @@ func (x *fastReflection_Output) Set(fd protoreflect.FieldDescriptor, value proto
 	switch fd.FullName() {
 	case "opinit.ophost.v1.Output.output_root":
 		x.OutputRoot = value.Bytes()
+	case "opinit.ophost.v1.Output.l1_block_number":
+		x.L1BlockNumber = value.Uint()
 	case "opinit.ophost.v1.Output.l1_block_time":
 		x.L1BlockTime = value.Message().Interface().(*timestamppb.Timestamp)
 	case "opinit.ophost.v1.Output.l2_block_number":
@@ -2578,6 +2595,8 @@ func (x *fastReflection_Output) Mutable(fd protoreflect.FieldDescriptor) protore
 		return protoreflect.ValueOfMessage(x.L1BlockTime.ProtoReflect())
 	case "opinit.ophost.v1.Output.output_root":
 		panic(fmt.Errorf("field output_root of message opinit.ophost.v1.Output is not mutable"))
+	case "opinit.ophost.v1.Output.l1_block_number":
+		panic(fmt.Errorf("field l1_block_number of message opinit.ophost.v1.Output is not mutable"))
 	case "opinit.ophost.v1.Output.l2_block_number":
 		panic(fmt.Errorf("field l2_block_number of message opinit.ophost.v1.Output is not mutable"))
 	default:
@@ -2595,6 +2614,8 @@ func (x *fastReflection_Output) NewField(fd protoreflect.FieldDescriptor) protor
 	switch fd.FullName() {
 	case "opinit.ophost.v1.Output.output_root":
 		return protoreflect.ValueOfBytes(nil)
+	case "opinit.ophost.v1.Output.l1_block_number":
+		return protoreflect.ValueOfUint64(uint64(0))
 	case "opinit.ophost.v1.Output.l1_block_time":
 		m := new(timestamppb.Timestamp)
 		return protoreflect.ValueOfMessage(m.ProtoReflect())
@@ -2673,6 +2694,9 @@ func (x *fastReflection_Output) ProtoMethods() *protoiface.Methods {
 		if l > 0 {
 			n += 1 + l + runtime.Sov(uint64(l))
 		}
+		if x.L1BlockNumber != 0 {
+			n += 1 + runtime.Sov(uint64(x.L1BlockNumber))
+		}
 		if x.L1BlockTime != nil {
 			l = options.Size(x.L1BlockTime)
 			n += 1 + l + runtime.Sov(uint64(l))
@@ -2712,7 +2736,7 @@ func (x *fastReflection_Output) ProtoMethods() *protoiface.Methods {
 		if x.L2BlockNumber != 0 {
 			i = runtime.EncodeVarint(dAtA, i, uint64(x.L2BlockNumber))
 			i--
-			dAtA[i] = 0x18
+			dAtA[i] = 0x20
 		}
 		if x.L1BlockTime != nil {
 			encoded, err := options.Marshal(x.L1BlockTime)
@@ -2726,7 +2750,12 @@ func (x *fastReflection_Output) ProtoMethods() *protoiface.Methods {
 			copy(dAtA[i:], encoded)
 			i = runtime.EncodeVarint(dAtA, i, uint64(len(encoded)))
 			i--
-			dAtA[i] = 0x12
+			dAtA[i] = 0x1a
+		}
+		if x.L1BlockNumber != 0 {
+			i = runtime.EncodeVarint(dAtA, i, uint64(x.L1BlockNumber))
+			i--
+			dAtA[i] = 0x10
 		}
 		if len(x.OutputRoot) > 0 {
 			i -= len(x.OutputRoot)
@@ -2819,6 +2848,25 @@ func (x *fastReflection_Output) ProtoMethods() *protoiface.Methods {
 				}
 				iNdEx = postIndex
 			case 2:
+				if wireType != 0 {
+					return protoiface.UnmarshalOutput{NoUnkeyedLiterals: input.NoUnkeyedLiterals, Flags: input.Flags}, fmt.Errorf("proto: wrong wireType = %d for field L1BlockNumber", wireType)
+				}
+				x.L1BlockNumber = 0
+				for shift := uint(0); ; shift += 7 {
+					if shift >= 64 {
+						return protoiface.UnmarshalOutput{NoUnkeyedLiterals: input.NoUnkeyedLiterals, Flags: input.Flags}, runtime.ErrIntOverflow
+					}
+					if iNdEx >= l {
+						return protoiface.UnmarshalOutput{NoUnkeyedLiterals: input.NoUnkeyedLiterals, Flags: input.Flags}, io.ErrUnexpectedEOF
+					}
+					b := dAtA[iNdEx]
+					iNdEx++
+					x.L1BlockNumber |= uint64(b&0x7F) << shift
+					if b < 0x80 {
+						break
+					}
+				}
+			case 3:
 				if wireType != 2 {
 					return protoiface.UnmarshalOutput{NoUnkeyedLiterals: input.NoUnkeyedLiterals, Flags: input.Flags}, fmt.Errorf("proto: wrong wireType = %d for field L1BlockTime", wireType)
 				}
@@ -2854,7 +2902,7 @@ func (x *fastReflection_Output) ProtoMethods() *protoiface.Methods {
 					return protoiface.UnmarshalOutput{NoUnkeyedLiterals: input.NoUnkeyedLiterals, Flags: input.Flags}, err
 				}
 				iNdEx = postIndex
-			case 3:
+			case 4:
 				if wireType != 0 {
 					return protoiface.UnmarshalOutput{NoUnkeyedLiterals: input.NoUnkeyedLiterals, Flags: input.Flags}, fmt.Errorf("proto: wrong wireType = %d for field L2BlockNumber", wireType)
 				}
@@ -3715,10 +3763,12 @@ type Output struct {
 
 	// Hash of the l2 output.
 	OutputRoot []byte `protobuf:"bytes,1,opt,name=output_root,json=outputRoot,proto3" json:"output_root,omitempty"`
+	// The l1 block number that the output root was submitted in.
+	L1BlockNumber uint64 `protobuf:"varint,2,opt,name=l1_block_number,json=l1BlockNumber,proto3" json:"l1_block_number,omitempty"`
 	// Timestamp of the l1 block that the output root was submitted in.
-	L1BlockTime *timestamppb.Timestamp `protobuf:"bytes,2,opt,name=l1_block_time,json=l1BlockTime,proto3" json:"l1_block_time,omitempty"`
+	L1BlockTime *timestamppb.Timestamp `protobuf:"bytes,3,opt,name=l1_block_time,json=l1BlockTime,proto3" json:"l1_block_time,omitempty"`
 	// The l2 block number that the output root was submitted in.
-	L2BlockNumber uint64 `protobuf:"varint,3,opt,name=l2_block_number,json=l2BlockNumber,proto3" json:"l2_block_number,omitempty"`
+	L2BlockNumber uint64 `protobuf:"varint,4,opt,name=l2_block_number,json=l2BlockNumber,proto3" json:"l2_block_number,omitempty"`
 }
 
 func (x *Output) Reset() {
@@ -3748,6 +3798,13 @@ func (x *Output) GetOutputRoot() []byte {
 	return nil
 }
 
+func (x *Output) GetL1BlockNumber() uint64 {
+	if x != nil {
+		return x.L1BlockNumber
+	}
+	return 0
+}
+
 func (x *Output) GetL1BlockTime() *timestamppb.Timestamp {
 	if x != nil {
 		return x.L1BlockTime
@@ -3882,40 +3939,43 @@ var file_opinit_ophost_v1_types_proto_rawDesc = []byte{
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+	0x69, 0x74, 0x2f, 0x61, 0x70, 0x69, 0x2f, 0x6f, 0x70, 0x69, 0x6e, 0x69, 0x74, 0x2f, 0x6f, 0x70,
+	0x68, 0x6f, 0x73, 0x74, 0x2f, 0x76, 0x31, 0x3b, 0x6f, 0x70, 0x68, 0x6f, 0x73, 0x74, 0x76, 0x31,
+	0xa2, 0x02, 0x03, 0x4f, 0x4f, 0x58, 0xaa, 0x02, 0x10, 0x4f, 0x70, 0x69, 0x6e, 0x69, 0x74, 0x2e,
+	0x4f, 0x70, 0x68, 0x6f, 0x73, 0x74, 0x2e, 0x56, 0x31, 0xca, 0x02, 0x10, 0x4f, 0x70, 0x69, 0x6e,
+	0x69, 0x74, 0x5c, 0x4f, 0x70, 0x68, 0x6f, 0x73, 0x74, 0x5c, 0x56, 0x31, 0xe2, 0x02, 0x1c, 0x4f,
+	0x70, 0x69, 0x6e, 0x69, 0x74, 0x5c, 0x4f, 0x70, 0x68, 0x6f, 0x73, 0x74, 0x5c, 0x56, 0x31, 0x5c,
+	0x47, 0x50, 0x42, 0x4d, 0x65, 0x74, 0x61, 0x64, 0x61, 0x74, 0x61, 0xea, 0x02, 0x12, 0x4f, 0x70,
+	0x69, 0x6e, 0x69, 0x74, 0x3a, 0x3a, 0x4f, 0x70, 0x68, 0x6f, 0x73, 0x74, 0x3a, 0x3a, 0x56, 0x31,
+	0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
diff --git a/proto/opinit/ophost/v1/types.proto b/proto/opinit/ophost/v1/types.proto
index e4d782b..6b34584 100644
--- a/proto/opinit/ophost/v1/types.proto
+++ b/proto/opinit/ophost/v1/types.proto
@@ -84,11 +84,13 @@ message TokenPair {
 message Output {
   // Hash of the l2 output.
   bytes output_root = 1;
+  // The l1 block number that the output root was submitted in.
+  uint64 l1_block_number = 2;
   // Timestamp of the l1 block that the output root was submitted in.
-  google.protobuf.Timestamp l1_block_time = 2
+  google.protobuf.Timestamp l1_block_time = 3
       [(gogoproto.stdtime) = true, (gogoproto.nullable) = false, (amino.dont_omitempty) = true];
   // The l2 block number that the output root was submitted in.
-  uint64 l2_block_number = 3;
+  uint64 l2_block_number = 4;
 }
 
 // BatchInfoWithOutput defines the batch information with output.
diff --git a/x/ophost/keeper/genesis_test.go b/x/ophost/keeper/genesis_test.go
index 0c4cf0c..be91964 100644
--- a/x/ophost/keeper/genesis_test.go
+++ b/x/ophost/keeper/genesis_test.go
@@ -42,16 +42,19 @@ func Test_GenesisExport(t *testing.T) {
 	output1 := types.Output{
 		OutputRoot:    []byte{1, 2, 3},
 		L1BlockTime:   time.Now().UTC(),
+		L1BlockNumber: 1,
 		L2BlockNumber: 100,
 	}
 	output2 := types.Output{
 		OutputRoot:    []byte{1, 2, 3},
 		L1BlockTime:   time.Now().UTC(),
+		L1BlockNumber: 2,
 		L2BlockNumber: 200,
 	}
 	output3 := types.Output{
 		OutputRoot:    []byte{1, 2, 3},
 		L1BlockTime:   time.Now().UTC(),
+		L1BlockNumber: 1,
 		L2BlockNumber: 100,
 	}
 	require.NoError(t, input.OPHostKeeper.SetOutputProposal(ctx, 1, 1, output1))
@@ -118,16 +121,19 @@ func Test_GenesisImportExport(t *testing.T) {
 	}
 	output1 := types.Output{
 		OutputRoot:    []byte{1, 2, 3},
+		L1BlockNumber: 1,
 		L1BlockTime:   time.Now().UTC(),
 		L2BlockNumber: 100,
 	}
 	output2 := types.Output{
 		OutputRoot:    []byte{1, 2, 3},
+		L1BlockNumber: 2,
 		L1BlockTime:   time.Now().UTC(),
 		L2BlockNumber: 200,
 	}
 	output3 := types.Output{
 		OutputRoot:    []byte{1, 2, 3},
+		L1BlockNumber: 1,
 		L1BlockTime:   time.Now().UTC(),
 		L2BlockNumber: 100,
 	}
diff --git a/x/ophost/keeper/msg_server.go b/x/ophost/keeper/msg_server.go
index aad9721..e7706d5 100644
--- a/x/ophost/keeper/msg_server.go
+++ b/x/ophost/keeper/msg_server.go
@@ -151,6 +151,7 @@ func (ms MsgServer) ProposeOutput(ctx context.Context, req *types.MsgProposeOutp
 	// store output proposal
 	if err := ms.SetOutputProposal(ctx, bridgeId, outputIndex, types.Output{
 		OutputRoot:    outputRoot,
+		L1BlockNumber: uint64(sdkCtx.BlockHeight()),
 		L1BlockTime:   sdkCtx.BlockTime(),
 		L2BlockNumber: l2BlockNumber,
 	}); err != nil {
diff --git a/x/ophost/keeper/msg_server_test.go b/x/ophost/keeper/msg_server_test.go
index f586992..10e80e3 100644
--- a/x/ophost/keeper/msg_server_test.go
+++ b/x/ophost/keeper/msg_server_test.go
@@ -85,6 +85,7 @@ func Test_ProposeOutput(t *testing.T) {
 	require.NoError(t, err)
 	require.Equal(t, types.Output{
 		OutputRoot:    []byte{1, 2, 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
+		L1BlockNumber: uint64(ctx.BlockHeight()),
 		L1BlockTime:   blockTime,
 		L2BlockNumber: 100,
 	}, output)
diff --git a/x/ophost/keeper/output_test.go b/x/ophost/keeper/output_test.go
index a66d890..318d84c 100644
--- a/x/ophost/keeper/output_test.go
+++ b/x/ophost/keeper/output_test.go
@@ -28,21 +28,25 @@ func Test_IterateOutputProposal(t *testing.T) {
 	ctx, input := createDefaultTestInput(t)
 	output1 := types.Output{
 		OutputRoot:    []byte{1, 2, 3},
+		L1BlockNumber: 1,
 		L1BlockTime:   time.Now().UTC(),
 		L2BlockNumber: 101,
 	}
 	output2 := types.Output{
 		OutputRoot:    []byte{4, 5, 6},
+		L1BlockNumber: 2,
 		L1BlockTime:   time.Now().UTC(),
 		L2BlockNumber: 102,
 	}
 	output3 := types.Output{
 		OutputRoot:    []byte{7, 8, 9},
+		L1BlockNumber: 3,
 		L1BlockTime:   time.Now().UTC(),
 		L2BlockNumber: 103,
 	}
 	output4 := types.Output{
 		OutputRoot:    []byte{10, 11, 12},
+		L1BlockNumber: 4,
 		L1BlockTime:   time.Now().UTC(),
 		L2BlockNumber: 104,
 	}
@@ -93,6 +97,7 @@ func Test_IsFinalized(t *testing.T) {
 	proposeTime := time.Now().UTC()
 	err = input.OPHostKeeper.SetOutputProposal(ctx, 1, 1, types.Output{
 		OutputRoot:    []byte{1, 2, 3},
+		L1BlockNumber: 1,
 		L1BlockTime:   proposeTime,
 		L2BlockNumber: 100,
 	})
@@ -151,6 +156,7 @@ func Test_GetLastFinalizedOutput(t *testing.T) {
 	proposeTime := time.Now().UTC()
 	err = input.OPHostKeeper.SetOutputProposal(ctx, 1, 1, types.Output{
 		OutputRoot:    []byte{1, 2, 3},
+		L1BlockNumber: 1,
 		L1BlockTime:   proposeTime,
 		L2BlockNumber: 100,
 	})
@@ -166,6 +172,7 @@ func Test_GetLastFinalizedOutput(t *testing.T) {
 	require.Equal(t, uint64(1), index)
 	require.Equal(t, types.Output{
 		OutputRoot:    []byte{1, 2, 3},
+		L1BlockNumber: 1,
 		L1BlockTime:   proposeTime,
 		L2BlockNumber: 100,
 	}, output)
@@ -176,6 +183,7 @@ func Test_DeleteOutputProposal(t *testing.T) {
 
 	output := types.Output{
 		OutputRoot:    []byte{1, 2, 3},
+		L1BlockNumber: 1,
 		L1BlockTime:   ctx.BlockTime(),
 		L2BlockNumber: 100,
 	}
diff --git a/x/ophost/keeper/querier_test.go b/x/ophost/keeper/querier_test.go
index 414e4d7..cab7794 100644
--- a/x/ophost/keeper/querier_test.go
+++ b/x/ophost/keeper/querier_test.go
@@ -130,7 +130,7 @@ func Test_QueryOutputProposal(t *testing.T) {
 	ctx, input := createDefaultTestInput(t)
 	output := types.Output{
 		OutputRoot:    []byte{1, 2, 3},
-		L1BlockTime:   time.Now().UTC(),
+		L1BlockNumber: 1,
 		L2BlockNumber: 100,
 	}
 	require.NoError(t, input.OPHostKeeper.SetOutputProposal(ctx, 1, 1, output))
@@ -148,12 +148,14 @@ func Test_QueryOutputProposals(t *testing.T) {
 	ctx, input := createDefaultTestInput(t)
 	output1 := types.Output{
 		OutputRoot:    []byte{1, 2, 3},
-		L1BlockTime:   time.Now().UTC(),
+		L1BlockNumber: 1,
+		L1BlockTime:   ctx.BlockTime(),
 		L2BlockNumber: 100,
 	}
 	output2 := types.Output{
 		OutputRoot:    []byte{3, 4, 5},
-		L1BlockTime:   time.Now().UTC(),
+		L1BlockNumber: 1,
+		L1BlockTime:   ctx.BlockTime(),
 		L2BlockNumber: 100,
 	}
 	require.NoError(t, input.OPHostKeeper.SetOutputProposal(ctx, 1, 1, output1))
@@ -194,7 +196,8 @@ func Test_QueryLastFinalizedOutput(t *testing.T) {
 	proposeTime := time.Now().UTC()
 	err = input.OPHostKeeper.SetOutputProposal(ctx, 1, 1, types.Output{
 		OutputRoot:    []byte{1, 2, 3},
-		L1BlockTime:   proposeTime,
+		L1BlockNumber: 1,
+		L1BlockTime:   ctx.BlockTime(),
 		L2BlockNumber: 100,
 	})
 	require.NoError(t, err)
@@ -214,7 +217,8 @@ func Test_QueryLastFinalizedOutput(t *testing.T) {
 	require.Equal(t, uint64(1), res.OutputIndex)
 	require.Equal(t, types.Output{
 		OutputRoot:    []byte{1, 2, 3},
-		L1BlockTime:   proposeTime,
+		L1BlockNumber: 1,
+		L1BlockTime:   ctx.BlockTime(),
 		L2BlockNumber: 100,
 	}, res.OutputProposal)
 }
@@ -271,7 +275,7 @@ func Test_QueryBatchInfos(t *testing.T) {
 		},
 		Output: types.Output{
 			OutputRoot:    []byte{1, 2, 3},
-			L1BlockTime:   time.Now().UTC(),
+			L1BlockNumber: 100,
 			L2BlockNumber: 300,
 		},
 	}
diff --git a/x/ophost/types/output.go b/x/ophost/types/output.go
index b856c83..04a40ed 100644
--- a/x/ophost/types/output.go
+++ b/x/ophost/types/output.go
@@ -16,7 +16,7 @@ func (output Output) Validate() error {
 }
 
 func (output Output) IsEmpty() bool {
-	return len(output.OutputRoot) == 0 && output.L1BlockTime.IsZero() && output.L2BlockNumber == 0
+	return len(output.OutputRoot) == 0 && output.L1BlockNumber == 0 && output.L2BlockNumber == 0
 }
 
 func GenerateOutputRoot(version byte, storageRoot []byte, latestBlockHash []byte) [32]byte {
diff --git a/x/ophost/types/types.pb.go b/x/ophost/types/types.pb.go
index a90a6eb..c90d3bd 100644
--- a/x/ophost/types/types.pb.go
+++ b/x/ophost/types/types.pb.go
@@ -239,10 +239,12 @@ var xxx_messageInfo_TokenPair proto.InternalMessageInfo
 type Output struct {
 	// Hash of the l2 output.
 	OutputRoot []byte `protobuf:"bytes,1,opt,name=output_root,json=outputRoot,proto3" json:"output_root,omitempty"`
+	// The l1 block number that the output root was submitted in.
+	L1BlockNumber uint64 `protobuf:"varint,2,opt,name=l1_block_number,json=l1BlockNumber,proto3" json:"l1_block_number,omitempty"`
 	// Timestamp of the l1 block that the output root was submitted in.
-	L1BlockTime time.Time `protobuf:"bytes,2,opt,name=l1_block_time,json=l1BlockTime,proto3,stdtime" json:"l1_block_time"`
+	L1BlockTime time.Time `protobuf:"bytes,3,opt,name=l1_block_time,json=l1BlockTime,proto3,stdtime" json:"l1_block_time"`
 	// The l2 block number that the output root was submitted in.
-	L2BlockNumber uint64 `protobuf:"varint,3,opt,name=l2_block_number,json=l2BlockNumber,proto3" json:"l2_block_number,omitempty"`
+	L2BlockNumber uint64 `protobuf:"varint,4,opt,name=l2_block_number,json=l2BlockNumber,proto3" json:"l2_block_number,omitempty"`
 }
 
 func (m *Output) Reset()         { *m = Output{} }
@@ -330,61 +332,62 @@ func init() {
 func init() { proto.RegisterFile("opinit/ophost/v1/types.proto", fileDescriptor_29cadbd84ee898dd) }
 
 var fileDescriptor_29cadbd84ee898dd = []byte{
-	// 862 bytes of a gzipped FileDescriptorProto
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+	// 868 bytes of a gzipped FileDescriptorProto
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+	0x5c, 0x06, 0x00, 0x00,
 }
 
 func (this *Params) Equal(that interface{}) bool {
@@ -539,6 +542,9 @@ func (this *Output) Equal(that interface{}) bool {
 	if !bytes.Equal(this.OutputRoot, that1.OutputRoot) {
 		return false
 	}
+	if this.L1BlockNumber != that1.L1BlockNumber {
+		return false
+	}
 	if !this.L1BlockTime.Equal(that1.L1BlockTime) {
 		return false
 	}
@@ -783,7 +789,7 @@ func (m *Output) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 	if m.L2BlockNumber != 0 {
 		i = encodeVarintTypes(dAtA, i, uint64(m.L2BlockNumber))
 		i--
-		dAtA[i] = 0x18
+		dAtA[i] = 0x20
 	}
 	n4, err4 := github_com_cosmos_gogoproto_types.StdTimeMarshalTo(m.L1BlockTime, dAtA[i-github_com_cosmos_gogoproto_types.SizeOfStdTime(m.L1BlockTime):])
 	if err4 != nil {
@@ -792,7 +798,12 @@ func (m *Output) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 	i -= n4
 	i = encodeVarintTypes(dAtA, i, uint64(n4))
 	i--
-	dAtA[i] = 0x12
+	dAtA[i] = 0x1a
+	if m.L1BlockNumber != 0 {
+		i = encodeVarintTypes(dAtA, i, uint64(m.L1BlockNumber))
+		i--
+		dAtA[i] = 0x10
+	}
 	if len(m.OutputRoot) > 0 {
 		i -= len(m.OutputRoot)
 		copy(dAtA[i:], m.OutputRoot)
@@ -947,6 +958,9 @@ func (m *Output) Size() (n int) {
 	if l > 0 {
 		n += 1 + l + sovTypes(uint64(l))
 	}
+	if m.L1BlockNumber != 0 {
+		n += 1 + sovTypes(uint64(m.L1BlockNumber))
+	}
 	l = github_com_cosmos_gogoproto_types.SizeOfStdTime(m.L1BlockTime)
 	n += 1 + l + sovTypes(uint64(l))
 	if m.L2BlockNumber != 0 {
@@ -1603,6 +1617,25 @@ func (m *Output) Unmarshal(dAtA []byte) error {
 			}
 			iNdEx = postIndex
 		case 2:
+			if wireType != 0 {
+				return fmt.Errorf("proto: wrong wireType = %d for field L1BlockNumber", wireType)
+			}
+			m.L1BlockNumber = 0
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowTypes
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				m.L1BlockNumber |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+		case 3:
 			if wireType != 2 {
 				return fmt.Errorf("proto: wrong wireType = %d for field L1BlockTime", wireType)
 			}
@@ -1635,7 +1668,7 @@ func (m *Output) Unmarshal(dAtA []byte) error {
 				return err
 			}
 			iNdEx = postIndex
-		case 3:
+		case 4:
 			if wireType != 0 {
 				return fmt.Errorf("proto: wrong wireType = %d for field L2BlockNumber", wireType)
 			}