diff --git a/api/cosmos/base/abci/v1beta1/abci.pulsar.go b/api/cosmos/base/abci/v1beta1/abci.pulsar.go
index 824ceb18f855..dbc76169d0a6 100644
--- a/api/cosmos/base/abci/v1beta1/abci.pulsar.go
+++ b/api/cosmos/base/abci/v1beta1/abci.pulsar.go
@@ -3512,6 +3512,7 @@ var (
 	fd_Result_log           protoreflect.FieldDescriptor
 	fd_Result_events        protoreflect.FieldDescriptor
 	fd_Result_msg_responses protoreflect.FieldDescriptor
+	fd_Result_lane_id       protoreflect.FieldDescriptor
 )
 
 func init() {
@@ -3521,6 +3522,7 @@ func init() {
 	fd_Result_log = md_Result.Fields().ByName("log")
 	fd_Result_events = md_Result.Fields().ByName("events")
 	fd_Result_msg_responses = md_Result.Fields().ByName("msg_responses")
+	fd_Result_lane_id = md_Result.Fields().ByName("lane_id")
 }
 
 var _ protoreflect.Message = (*fastReflection_Result)(nil)
@@ -3612,6 +3614,12 @@ func (x *fastReflection_Result) Range(f func(protoreflect.FieldDescriptor, proto
 			return
 		}
 	}
+	if x.LaneId != "" {
+		value := protoreflect.ValueOfString(x.LaneId)
+		if !f(fd_Result_lane_id, value) {
+			return
+		}
+	}
 }
 
 // Has reports whether a field is populated.
@@ -3635,6 +3643,8 @@ func (x *fastReflection_Result) Has(fd protoreflect.FieldDescriptor) bool {
 		return len(x.Events) != 0
 	case "cosmos.base.abci.v1beta1.Result.msg_responses":
 		return len(x.MsgResponses) != 0
+	case "cosmos.base.abci.v1beta1.Result.lane_id":
+		return x.LaneId != ""
 	default:
 		if fd.IsExtension() {
 			panic(fmt.Errorf("proto3 declared messages do not support extensions: cosmos.base.abci.v1beta1.Result"))
@@ -3659,6 +3669,8 @@ func (x *fastReflection_Result) Clear(fd protoreflect.FieldDescriptor) {
 		x.Events = nil
 	case "cosmos.base.abci.v1beta1.Result.msg_responses":
 		x.MsgResponses = nil
+	case "cosmos.base.abci.v1beta1.Result.lane_id":
+		x.LaneId = ""
 	default:
 		if fd.IsExtension() {
 			panic(fmt.Errorf("proto3 declared messages do not support extensions: cosmos.base.abci.v1beta1.Result"))
@@ -3693,6 +3705,9 @@ func (x *fastReflection_Result) Get(descriptor protoreflect.FieldDescriptor) pro
 		}
 		listValue := &_Result_4_list{list: &x.MsgResponses}
 		return protoreflect.ValueOfList(listValue)
+	case "cosmos.base.abci.v1beta1.Result.lane_id":
+		value := x.LaneId
+		return protoreflect.ValueOfString(value)
 	default:
 		if descriptor.IsExtension() {
 			panic(fmt.Errorf("proto3 declared messages do not support extensions: cosmos.base.abci.v1beta1.Result"))
@@ -3725,6 +3740,8 @@ func (x *fastReflection_Result) Set(fd protoreflect.FieldDescriptor, value proto
 		lv := value.List()
 		clv := lv.(*_Result_4_list)
 		x.MsgResponses = *clv.list
+	case "cosmos.base.abci.v1beta1.Result.lane_id":
+		x.LaneId = value.Interface().(string)
 	default:
 		if fd.IsExtension() {
 			panic(fmt.Errorf("proto3 declared messages do not support extensions: cosmos.base.abci.v1beta1.Result"))
@@ -3761,6 +3778,8 @@ func (x *fastReflection_Result) Mutable(fd protoreflect.FieldDescriptor) protore
 		panic(fmt.Errorf("field data of message cosmos.base.abci.v1beta1.Result is not mutable"))
 	case "cosmos.base.abci.v1beta1.Result.log":
 		panic(fmt.Errorf("field log of message cosmos.base.abci.v1beta1.Result is not mutable"))
+	case "cosmos.base.abci.v1beta1.Result.lane_id":
+		panic(fmt.Errorf("field lane_id of message cosmos.base.abci.v1beta1.Result is not mutable"))
 	default:
 		if fd.IsExtension() {
 			panic(fmt.Errorf("proto3 declared messages do not support extensions: cosmos.base.abci.v1beta1.Result"))
@@ -3784,6 +3803,8 @@ func (x *fastReflection_Result) NewField(fd protoreflect.FieldDescriptor) protor
 	case "cosmos.base.abci.v1beta1.Result.msg_responses":
 		list := []*anypb.Any{}
 		return protoreflect.ValueOfList(&_Result_4_list{list: &list})
+	case "cosmos.base.abci.v1beta1.Result.lane_id":
+		return protoreflect.ValueOfString("")
 	default:
 		if fd.IsExtension() {
 			panic(fmt.Errorf("proto3 declared messages do not support extensions: cosmos.base.abci.v1beta1.Result"))
@@ -3873,6 +3894,10 @@ func (x *fastReflection_Result) ProtoMethods() *protoiface.Methods {
 				n += 1 + l + runtime.Sov(uint64(l))
 			}
 		}
+		l = len(x.LaneId)
+		if l > 0 {
+			n += 1 + l + runtime.Sov(uint64(l))
+		}
 		if x.unknownFields != nil {
 			n += len(x.unknownFields)
 		}
@@ -3902,6 +3927,13 @@ func (x *fastReflection_Result) ProtoMethods() *protoiface.Methods {
 			i -= len(x.unknownFields)
 			copy(dAtA[i:], x.unknownFields)
 		}
+		if len(x.LaneId) > 0 {
+			i -= len(x.LaneId)
+			copy(dAtA[i:], x.LaneId)
+			i = runtime.EncodeVarint(dAtA, i, uint64(len(x.LaneId)))
+			i--
+			dAtA[i] = 0x2a
+		}
 		if len(x.MsgResponses) > 0 {
 			for iNdEx := len(x.MsgResponses) - 1; iNdEx >= 0; iNdEx-- {
 				encoded, err := options.Marshal(x.MsgResponses[iNdEx])
@@ -4131,6 +4163,38 @@ func (x *fastReflection_Result) ProtoMethods() *protoiface.Methods {
 					return protoiface.UnmarshalOutput{NoUnkeyedLiterals: input.NoUnkeyedLiterals, Flags: input.Flags}, err
 				}
 				iNdEx = postIndex
+			case 5:
+				if wireType != 2 {
+					return protoiface.UnmarshalOutput{NoUnkeyedLiterals: input.NoUnkeyedLiterals, Flags: input.Flags}, fmt.Errorf("proto: wrong wireType = %d for field LaneId", wireType)
+				}
+				var stringLen uint64
+				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++
+					stringLen |= uint64(b&0x7F) << shift
+					if b < 0x80 {
+						break
+					}
+				}
+				intStringLen := int(stringLen)
+				if intStringLen < 0 {
+					return protoiface.UnmarshalOutput{NoUnkeyedLiterals: input.NoUnkeyedLiterals, Flags: input.Flags}, runtime.ErrInvalidLength
+				}
+				postIndex := iNdEx + intStringLen
+				if postIndex < 0 {
+					return protoiface.UnmarshalOutput{NoUnkeyedLiterals: input.NoUnkeyedLiterals, Flags: input.Flags}, runtime.ErrInvalidLength
+				}
+				if postIndex > l {
+					return protoiface.UnmarshalOutput{NoUnkeyedLiterals: input.NoUnkeyedLiterals, Flags: input.Flags}, io.ErrUnexpectedEOF
+				}
+				x.LaneId = string(dAtA[iNdEx:postIndex])
+				iNdEx = postIndex
 			default:
 				iNdEx = preIndex
 				skippy, err := runtime.Skip(dAtA[iNdEx:])
@@ -7641,6 +7705,8 @@ type Result struct {
 	Events []*v1.Event `protobuf:"bytes,3,rep,name=events,proto3" json:"events,omitempty"`
 	// msg_responses contains the Msg handler responses type packed in Anys.
 	MsgResponses []*anypb.Any `protobuf:"bytes,4,rep,name=msg_responses,json=msgResponses,proto3" json:"msg_responses,omitempty"`
+	// lane_id is used by the comet mempool to identify the lane that the transaction should be broadcast in.
+	LaneId string `protobuf:"bytes,5,opt,name=lane_id,json=laneId,proto3" json:"lane_id,omitempty"`
 }
 
 func (x *Result) Reset() {
@@ -7692,6 +7758,13 @@ func (x *Result) GetMsgResponses() []*anypb.Any {
 	return nil
 }
 
+func (x *Result) GetLaneId() string {
+	if x != nil {
+		return x.LaneId
+	}
+	return ""
+}
+
 // SimulationResponse defines the response generated when a transaction is
 // successfully simulated.
 type SimulationResponse struct {
@@ -8069,7 +8142,7 @@ var file_cosmos_base_abci_v1beta1_abci_proto_rawDesc = []byte{
 	0x61, 0x73, 0x5f, 0x77, 0x61, 0x6e, 0x74, 0x65, 0x64, 0x18, 0x01, 0x20, 0x01, 0x28, 0x04, 0x52,
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@@ -8081,73 +8154,75 @@ var file_cosmos_base_abci_v1beta1_abci_proto_rawDesc = []byte{
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+	0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
diff --git a/baseapp/abci.go b/baseapp/abci.go
index 05b9e61794a7..bc87e48dcf36 100644
--- a/baseapp/abci.go
+++ b/baseapp/abci.go
@@ -152,12 +152,16 @@ func (app *BaseApp) Info(_ *abci.InfoRequest) (*abci.InfoResponse, error) {
 		}
 	}
 
+	lanes, defaultLane := app.laneHandler.GetLanes()
+
 	return &abci.InfoResponse{
 		Data:             app.name,
 		Version:          app.version,
 		AppVersion:       appVersion,
 		LastBlockHeight:  lastCommitID.Version,
 		LastBlockAppHash: lastCommitID.Hash,
+		LanePriorities:   lanes,
+		DefaultLane:      defaultLane,
 	}, nil
 }
 
@@ -377,6 +381,7 @@ func (app *BaseApp) CheckTx(req *abci.CheckTxRequest) (*abci.CheckTxResponse, er
 		Log:       result.Log,
 		Data:      result.Data,
 		Events:    sdk.MarkEventsToIndex(result.Events, app.indexEvents),
+		LaneId:    result.LaneId,
 	}, nil
 }
 
diff --git a/baseapp/abci_utils.go b/baseapp/abci_utils.go
index bc0cb9daccdd..75f8c0bd0284 100644
--- a/baseapp/abci_utils.go
+++ b/baseapp/abci_utils.go
@@ -538,3 +538,17 @@ func (ts *defaultTxSelector) SelectTxForProposal(_ context.Context, maxTxBytes,
 	// check if we've reached capacity; if so, we cannot select any more transactions
 	return ts.totalTxBytes >= maxTxBytes || (maxBlockGas > 0 && (ts.totalTxGas >= maxBlockGas))
 }
+
+var _ mempool.Lanes = NoopLaneHandler{}
+
+// NoopLaneHandler is a LaneHandler that does not return any lanes.
+// All transactions are considered to be in the default lane.
+type NoopLaneHandler struct{}
+
+func (NoopLaneHandler) GetLanes() (map[string]uint32, string) {
+	return map[string]uint32{}, ""
+}
+
+func (NoopLaneHandler) GetTxLane(_ context.Context, _ sdk.Tx) (string, error) {
+	return "", nil
+}
diff --git a/baseapp/baseapp.go b/baseapp/baseapp.go
index 89748eadf053..85cf271e238b 100644
--- a/baseapp/baseapp.go
+++ b/baseapp/baseapp.go
@@ -91,6 +91,7 @@ type BaseApp struct {
 	prepareCheckStater sdk.PrepareCheckStater         // logic to run during commit using the checkState
 	precommiter        sdk.Precommiter                // logic to run during commit using the deliverState
 	versionModifier    server.VersionModifier         // interface to get and set the app version
+	laneHandler        mempool.Lanes                  // lane handler for the comet mempool
 
 	addrPeerFilter sdk.PeerFilter // filter peers by address and port
 	idPeerFilter   sdk.PeerFilter // filter peers by node ID
@@ -938,6 +939,15 @@ func (app *BaseApp) runTx(mode execMode, txBytes []byte) (gInfo sdk.GasInfo, res
 		if err != nil {
 			return gInfo, nil, anteEvents, err
 		}
+		if app.laneHandler != nil {
+			// if the laneHandler is set, we set the laneId in the result
+			// this takes advantage of https://github.com/cometbft/cometbft/blob/main/docs/references/architecture/adr-118-mempool-lanes.md
+			lane, err := app.laneHandler.GetTxLane(ctx, tx)
+			if err != nil {
+				return gInfo, nil, anteEvents, err
+			}
+			result.LaneId = lane
+		}
 	} else if mode == execModeFinalize {
 		err = app.mempool.Remove(tx)
 		if err != nil && !errors.Is(err, mempool.ErrTxNotFound) {
@@ -1003,6 +1013,8 @@ func (app *BaseApp) runTx(mode execMode, txBytes []byte) (gInfo sdk.GasInfo, res
 		}
 	}
 
+	// handleLaned mempool
+
 	return gInfo, result, anteEvents, err
 }
 
diff --git a/baseapp/options.go b/baseapp/options.go
index 53286b2540b9..586efed194eb 100644
--- a/baseapp/options.go
+++ b/baseapp/options.go
@@ -406,3 +406,9 @@ func (app *BaseApp) SetMsgServiceRouter(msgServiceRouter *MsgServiceRouter) {
 func (app *BaseApp) SetGRPCQueryRouter(grpcQueryRouter *GRPCQueryRouter) {
 	app.grpcQueryRouter = grpcQueryRouter
 }
+
+// SetLaneHandler provides baseapp the LaneHandler
+// 0 is a reserved lane, order of the lanes does not matter
+func (app *BaseApp) SetLaneHandler(laneHandler mempool.Lanes) {
+	app.laneHandler = laneHandler
+}
diff --git a/docs/build/abci/04-checktx.md b/docs/build/abci/04-checktx.md
new file mode 100644
index 000000000000..e08804eb34ed
--- /dev/null
+++ b/docs/build/abci/04-checktx.md
@@ -0,0 +1,77 @@
+# CheckTx
+
+CheckTx is called by the `BaseApp` when comet receives a transaction from a client, over the p2p network or RPC. The CheckTx method is responsible for validating the transaction and returning an error if the transaction is invalid. 
+
+```mermaid
+graph TD
+    subgraph SDK[Cosmos SDK]
+        B[Baseapp]
+        A[AnteHandlers]
+        B <-->|Validate TX| A
+    end
+    C[CometBFT] <-->|CheckTx|SDK
+    U((User)) -->|Submit TX| C
+    N[P2P] -->|Receive TX| C
+```
+
+```go
+// CheckTx implements the ABCI interface.
+func (app *BaseApp) CheckTx(req abci.RequestCheckTx) abci.ResponseCheckTx {
+	var mode execMode
+
+	switch {
+	case req.Type == abci.CHECK_TX_TYPE_CHECK:
+		mode = execModeCheck
+
+	case req.Type == abci.CHECK_TX_TYPE_RECHECK:
+		mode = execModeReCheck
+
+	default:
+		return nil, fmt.Errorf("unknown RequestCheckTx type: %s", req.Type)
+	}
+
+	gInfo, result, anteEvents, err := app.runTx(mode, req.Tx, nil)
+	if err != nil {
+		return responseCheckTxWithEvents(err, gInfo.GasWanted, gInfo.GasUsed, anteEvents, app.trace), nil
+	}
+
+	return &abci.CheckTxResponse{
+		GasWanted: int64(gInfo.GasWanted),
+		GasUsed:   int64(gInfo.GasUsed),
+		Log:       result.Log,
+		Data:      result.Data,
+		Events:    sdk.MarkEventsToIndex(result.Events, app.indexEvents),
+	}, nil
+}
+```
+
+## CheckTx Lane Handler
+
+Comet provides the optionality for application developers to set a lane for a specific type of transaction. This allows the application to set a form of priority for transaction dissemination. 
+
+The `LaneHandler` interface is defined as follows:
+
+```go
+type Lanes interface {
+	GetLanes() (lanes map[string]uint32, defaultLane string)
+	GetTxLane(context.Context, sdk.Tx) (string, error)
+}
+```
+
+The `LaneHandler` is set on the `BaseApp` using the `SetLaneHandler` method.
+
+```go
+func NewSimApp(
+	logger log.Logger,
+	db corestore.KVStoreWithBatch,
+	traceStore io.Writer,
+	loadLatest bool,
+	appOpts servertypes.AppOptions,
+	baseAppOptions ...func(*baseapp.BaseApp),
+) *SimApp {
+  ...
+  laneHandler := mempool.CustomLaneHandler(map[string]uint32{}, "default")
+  app.SetLaneHandler(laneHandler)
+  ...
+}
+```
diff --git a/go.mod b/go.mod
index 0c54a37dd9d4..8b213d0d7fa3 100644
--- a/go.mod
+++ b/go.mod
@@ -18,8 +18,8 @@ require (
 	cosmossdk.io/x/tx v0.13.3
 	github.com/99designs/keyring v1.2.2
 	github.com/bgentry/speakeasy v0.2.0
-	github.com/cometbft/cometbft v1.0.0-rc1.0.20240908111210-ab0be101882f
-	github.com/cometbft/cometbft/api v1.0.0-rc.1
+	github.com/cometbft/cometbft v1.0.0-rc1.0.20240925131815-d341b313d7e2
+	github.com/cometbft/cometbft/api v1.0.0-rc.1.0.20240925131815-d341b313d7e2
 	github.com/cosmos/btcutil v1.0.5
 	github.com/cosmos/cosmos-db v1.0.3-0.20240911104526-ddc3f09bfc22
 	github.com/cosmos/cosmos-proto v1.0.0-beta.5
@@ -82,7 +82,7 @@ require (
 	github.com/cockroachdb/pebble v1.1.2 // indirect
 	github.com/cockroachdb/redact v1.1.5 // indirect
 	github.com/cockroachdb/tokenbucket v0.0.0-20230807174530-cc333fc44b06 // indirect
-	github.com/cometbft/cometbft-db v0.15.0 // indirect
+	github.com/cometbft/cometbft-db v1.0.0 // indirect
 	github.com/cosmos/iavl v1.3.0 // indirect
 	github.com/cosmos/ics23/go v0.11.0 // indirect
 	github.com/danieljoos/wincred v1.2.1 // indirect
@@ -96,7 +96,6 @@ require (
 	github.com/felixge/httpsnoop v1.0.4 // indirect
 	github.com/fsnotify/fsnotify v1.7.0 // indirect
 	github.com/getsentry/sentry-go v0.27.0 // indirect
-	github.com/go-kit/kit v0.13.0 // indirect
 	github.com/go-kit/log v0.2.1 // indirect
 	github.com/go-logfmt/logfmt v0.6.0 // indirect
 	github.com/godbus/dbus v0.0.0-20190726142602-4481cbc300e2 // indirect
@@ -144,7 +143,7 @@ require (
 	github.com/rcrowley/go-metrics v0.0.0-20201227073835-cf1acfcdf475 // indirect
 	github.com/rivo/uniseg v0.2.0 // indirect
 	github.com/rogpeppe/go-internal v1.12.0 // indirect
-	github.com/rs/cors v1.11.0 // indirect
+	github.com/rs/cors v1.11.1 // indirect
 	github.com/sagikazarmark/locafero v0.4.0 // indirect
 	github.com/sagikazarmark/slog-shim v0.1.0 // indirect
 	github.com/sasha-s/go-deadlock v0.3.5 // indirect
diff --git a/go.sum b/go.sum
index 4508c5975094..164cf9ab9e09 100644
--- a/go.sum
+++ b/go.sum
@@ -34,8 +34,6 @@ github.com/Microsoft/go-winio v0.6.1 h1:9/kr64B9VUZrLm5YYwbGtUJnMgqWVOdUAXu6Migc
 github.com/Microsoft/go-winio v0.6.1/go.mod h1:LRdKpFKfdobln8UmuiYcKPot9D2v6svN5+sAH+4kjUM=
 github.com/Nvveen/Gotty v0.0.0-20120604004816-cd527374f1e5 h1:TngWCqHvy9oXAN6lEVMRuU21PR1EtLVZJmdB18Gu3Rw=
 github.com/Nvveen/Gotty v0.0.0-20120604004816-cd527374f1e5/go.mod h1:lmUJ/7eu/Q8D7ML55dXQrVaamCz2vxCfdQBasLZfHKk=
-github.com/VividCortex/gohistogram v1.0.0 h1:6+hBz+qvs0JOrrNhhmR7lFxo5sINxBCGXrdtl/UvroE=
-github.com/VividCortex/gohistogram v1.0.0/go.mod h1:Pf5mBqqDxYaXu3hDrrU+w6nw50o/4+TcAqDqk/vUH7g=
 github.com/adlio/schema v1.3.6 h1:k1/zc2jNfeiZBA5aFTRy37jlBIuCkXCm0XmvpzCKI9I=
 github.com/adlio/schema v1.3.6/go.mod h1:qkxwLgPBd1FgLRHYVCmQT/rrBr3JH38J9LjmVzWNudg=
 github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
@@ -90,12 +88,12 @@ github.com/cockroachdb/redact v1.1.5 h1:u1PMllDkdFfPWaNGMyLD1+so+aq3uUItthCFqzwP
 github.com/cockroachdb/redact v1.1.5/go.mod h1:BVNblN9mBWFyMyqK1k3AAiSxhvhfK2oOZZ2lK+dpvRg=
 github.com/cockroachdb/tokenbucket v0.0.0-20230807174530-cc333fc44b06 h1:zuQyyAKVxetITBuuhv3BI9cMrmStnpT18zmgmTxunpo=
 github.com/cockroachdb/tokenbucket v0.0.0-20230807174530-cc333fc44b06/go.mod h1:7nc4anLGjupUW/PeY5qiNYsdNXj7zopG+eqsS7To5IQ=
-github.com/cometbft/cometbft v1.0.0-rc1.0.20240908111210-ab0be101882f h1:rPWKqyc+CeuddICqlqptf+3NPE8exbC9SOGuDPTEN3k=
-github.com/cometbft/cometbft v1.0.0-rc1.0.20240908111210-ab0be101882f/go.mod h1:MqZ5E5jLU1JdP10FSRXhItpm+GdHMbW7Myv3UARLxqg=
-github.com/cometbft/cometbft-db v0.15.0 h1:VLtsRt8udD4jHCyjvrsTBpgz83qne5hnL245AcPJVRk=
-github.com/cometbft/cometbft-db v0.15.0/go.mod h1:EBrFs1GDRiTqrWXYi4v90Awf/gcdD5ExzdPbg4X8+mk=
-github.com/cometbft/cometbft/api v1.0.0-rc.1 h1:GtdXwDGlqwHYs16A4egjwylfYOMYyEacLBrs3Zvpt7g=
-github.com/cometbft/cometbft/api v1.0.0-rc.1/go.mod h1:NDFKiBBD8HJC6QQLAoUI99YhsiRZtg2+FJWfk6A6m6o=
+github.com/cometbft/cometbft v1.0.0-rc1.0.20240925131815-d341b313d7e2 h1:zMiCop6ZA3mqjhCjI61uMKbIbJuumIwA9PGPkkOTHC4=
+github.com/cometbft/cometbft v1.0.0-rc1.0.20240925131815-d341b313d7e2/go.mod h1:vNUsiRz1tV9U0Opnvpw/WxPgvvFIi3Gdm+rkpxwnkas=
+github.com/cometbft/cometbft-db v1.0.0 h1:AK805KzaWCzBYnWaUvMRiV4+uoZJIPRYn/VpDfke2ic=
+github.com/cometbft/cometbft-db v1.0.0/go.mod h1:EBrFs1GDRiTqrWXYi4v90Awf/gcdD5ExzdPbg4X8+mk=
+github.com/cometbft/cometbft/api v1.0.0-rc.1.0.20240925131815-d341b313d7e2 h1:fex0Z7zPKZMxHVSdWchKqkL/Ag9AuLDq+/kzDJNTOIQ=
+github.com/cometbft/cometbft/api v1.0.0-rc.1.0.20240925131815-d341b313d7e2/go.mod h1:EkQiqVSu/p2ebrZEnB2z6Re7r8XNe//M7ylR0qEwWm0=
 github.com/containerd/continuity v0.3.0 h1:nisirsYROK15TAMVukJOUyGJjz4BNQJBVsNvAXZJ/eg=
 github.com/containerd/continuity v0.3.0/go.mod h1:wJEAIwKOm/pBZuBd0JmeTvnLquTB1Ag8espWhkykbPM=
 github.com/coreos/go-systemd/v22 v22.5.0/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
@@ -177,8 +175,6 @@ github.com/go-errors/errors v1.4.2 h1:J6MZopCL4uSllY1OfXM374weqZFFItUbrImctkmUxI
 github.com/go-errors/errors v1.4.2/go.mod h1:sIVyrIiJhuEF+Pj9Ebtd6P/rEYROXFi3BopGUQ5a5Og=
 github.com/go-kit/kit v0.8.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
 github.com/go-kit/kit v0.9.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
-github.com/go-kit/kit v0.13.0 h1:OoneCcHKHQ03LfBpoQCUfCluwd2Vt3ohz+kvbJneZAU=
-github.com/go-kit/kit v0.13.0/go.mod h1:phqEHMMUbyrCFCTgH48JueqrM3md2HcAZ8N3XE4FKDg=
 github.com/go-kit/log v0.1.0/go.mod h1:zbhenjAZHb184qTLMA9ZjW7ThYL0H2mk7Q6pNt4vbaY=
 github.com/go-kit/log v0.2.1 h1:MRVx0/zhvdseW+Gza6N9rVzU/IVzaeE1SFI4raAhmBU=
 github.com/go-kit/log v0.2.1/go.mod h1:NwTd00d/i8cPZ3xOwwiv2PO5MOcx78fFErGNcVmBjv0=
@@ -426,8 +422,8 @@ github.com/rogpeppe/fastuuid v1.2.0/go.mod h1:jVj6XXZzXRy/MSR5jhDC/2q6DgLz+nrA6L
 github.com/rogpeppe/go-internal v1.9.0/go.mod h1:WtVeX8xhTBvf0smdhujwtBcq4Qrzq/fJaraNFVN+nFs=
 github.com/rogpeppe/go-internal v1.12.0 h1:exVL4IDcn6na9z1rAb56Vxr+CgyK3nn3O+epU5NdKM8=
 github.com/rogpeppe/go-internal v1.12.0/go.mod h1:E+RYuTGaKKdloAfM02xzb0FW3Paa99yedzYV+kq4uf4=
-github.com/rs/cors v1.11.0 h1:0B9GE/r9Bc2UxRMMtymBkHTenPkHDv0CW4Y98GBY+po=
-github.com/rs/cors v1.11.0/go.mod h1:XyqrcTp5zjWr1wsJ8PIRZssZ8b/WMcMf71DJnit4EMU=
+github.com/rs/cors v1.11.1 h1:eU3gRzXLRK57F5rKMGMZURNdIG4EoAmX8k94r9wXWHA=
+github.com/rs/cors v1.11.1/go.mod h1:XyqrcTp5zjWr1wsJ8PIRZssZ8b/WMcMf71DJnit4EMU=
 github.com/rs/xid v1.5.0/go.mod h1:trrq9SKmegXys3aeAKXMUTdJsYXVwGY3RLcfgqegfbg=
 github.com/rs/zerolog v1.33.0 h1:1cU2KZkvPxNyfgEmhHAz/1A9Bz+llsdYzklWFzgp0r8=
 github.com/rs/zerolog v1.33.0/go.mod h1:/7mN4D5sKwJLZQ2b/znpjC3/GQWY/xaDXUM0kKWRHss=
diff --git a/proto/cosmos/base/abci/v1beta1/abci.proto b/proto/cosmos/base/abci/v1beta1/abci.proto
index 63a09e73091e..622f88dc6d8c 100644
--- a/proto/cosmos/base/abci/v1beta1/abci.proto
+++ b/proto/cosmos/base/abci/v1beta1/abci.proto
@@ -105,6 +105,8 @@ message Result {
 
   // msg_responses contains the Msg handler responses type packed in Anys.
   repeated google.protobuf.Any msg_responses = 4 [(cosmos_proto.field_added_in) = "cosmos-sdk 0.46"];
+  // lane_id is used by the comet mempool to identify the lane that the transaction should be broadcast in.
+  uint32`` lane_id = 5;
 }
 
 // SimulationResponse defines the response generated when a transaction is
diff --git a/types/abci.pb.go b/types/abci.pb.go
index b4dadfb2d040..5a443b141575 100644
--- a/types/abci.pb.go
+++ b/types/abci.pb.go
@@ -334,6 +334,8 @@ type Result struct {
 	Events []v1.Event `protobuf:"bytes,3,rep,name=events,proto3" json:"events"`
 	// msg_responses contains the Msg handler responses type packed in Anys.
 	MsgResponses []*any.Any `protobuf:"bytes,4,rep,name=msg_responses,json=msgResponses,proto3" json:"msg_responses,omitempty"`
+	// lane_id is used by the comet mempool to identify the lane that the transaction should be broadcast in.
+	LaneId string `protobuf:"bytes,5,opt,name=lane_id,json=laneId,proto3" json:"lane_id,omitempty"`
 }
 
 func (m *Result) Reset()      { *m = Result{} }
@@ -724,70 +726,71 @@ func init() {
 }
 
 var fileDescriptor_4e37629bc7eb0df8 = []byte{
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+	// 1019 bytes of a gzipped FileDescriptorProto
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+	0x42, 0x78, 0x2d, 0x78, 0xfc, 0xae, 0x40, 0xe8, 0x2f, 0x47, 0xe8, 0x5f, 0x81, 0xd0, 0xff, 0x0f,
+	0x84, 0xfe, 0x52, 0x84, 0x7e, 0x86, 0xf0, 0x3e, 0x09, 0xf0, 0x65, 0xce, 0x40, 0x86, 0xf3, 0x11,
+	0xb5, 0x0f, 0xfa, 0xe1, 0x56, 0x84, 0xd5, 0x33, 0x97, 0x67, 0xb1, 0xb5, 0x9e, 0x9c, 0xfe, 0x59,
+	0xc9, 0xbd, 0x3e, 0xaf, 0x78, 0x27, 0xe7, 0x15, 0xef, 0xed, 0x79, 0xc5, 0xfb, 0xfe, 0xa2, 0x92,
+	0x3b, 0xb9, 0xa8, 0xe4, 0x4e, 0x2f, 0x2a, 0xb9, 0x6f, 0xea, 0x32, 0x36, 0x83, 0x49, 0x17, 0xce,
+	0x72, 0x6f, 0x78, 0x73, 0xae, 0x07, 0xfb, 0x4f, 0xd0, 0x0d, 0x50, 0x33, 0x0f, 0xfe, 0x0e, 0x00,
+	0x00, 0xff, 0xff, 0x54, 0xc1, 0xc4, 0xf1, 0x9f, 0x08, 0x00, 0x00,
 }
 
 func (m *TxResponse) Marshal() (dAtA []byte, err error) {
@@ -1098,6 +1101,13 @@ func (m *Result) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 	_ = i
 	var l int
 	_ = l
+	if len(m.LaneId) > 0 {
+		i -= len(m.LaneId)
+		copy(dAtA[i:], m.LaneId)
+		i = encodeVarintAbci(dAtA, i, uint64(len(m.LaneId)))
+		i--
+		dAtA[i] = 0x2a
+	}
 	if len(m.MsgResponses) > 0 {
 		for iNdEx := len(m.MsgResponses) - 1; iNdEx >= 0; iNdEx-- {
 			{
@@ -1571,6 +1581,10 @@ func (m *Result) Size() (n int) {
 			n += 1 + l + sovAbci(uint64(l))
 		}
 	}
+	l = len(m.LaneId)
+	if l > 0 {
+		n += 1 + l + sovAbci(uint64(l))
+	}
 	return n
 }
 
@@ -2844,6 +2858,38 @@ func (m *Result) Unmarshal(dAtA []byte) error {
 				return err
 			}
 			iNdEx = postIndex
+		case 5:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field LaneId", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowAbci
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= uint64(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return ErrInvalidLengthAbci
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex < 0 {
+				return ErrInvalidLengthAbci
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.LaneId = string(dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
 		default:
 			iNdEx = preIndex
 			skippy, err := skipAbci(dAtA[iNdEx:])
diff --git a/types/mempool/mempool.go b/types/mempool/mempool.go
index 6aa29ff3263c..ac24a4025f30 100644
--- a/types/mempool/mempool.go
+++ b/types/mempool/mempool.go
@@ -39,6 +39,14 @@ type Iterator interface {
 	Tx() sdk.Tx
 }
 
+type Lanes interface {
+	// GetLanes gets all the available lanes an application has with the default lane
+	GetLanes() (lanes map[string]uint32, defaultLane string)
+
+	// GetTxLane returns the lane priority for the given transaction
+	GetTxLane(context.Context, sdk.Tx) (string, error)
+}
+
 var (
 	ErrTxNotFound           = errors.New("tx not found in mempool")
 	ErrMempoolTxMaxCapacity = errors.New("pool reached max tx capacity")