diff --git a/docs/ibc/proto-docs.md b/docs/ibc/proto-docs.md
index 5aaf1fd55f4..881a5e4bc07 100644
--- a/docs/ibc/proto-docs.md
+++ b/docs/ibc/proto-docs.md
@@ -699,6 +699,7 @@ https://github.com/cosmos/ibc/tree/master/spec/app/ics-020-fungible-token-transf
 | `receiver` | [string](#string) |  | the recipient address on the destination chain |
 | `timeout_height` | [ibc.core.client.v1.Height](#ibc.core.client.v1.Height) |  | Timeout height relative to the current block height. The timeout is disabled when set to 0. |
 | `timeout_timestamp` | [uint64](#uint64) |  | Timeout timestamp (in nanoseconds) relative to the current block timestamp. The timeout is disabled when set to 0. |
+| `metadata` | [bytes](#bytes) |  | optional metadata |
 
 
 
@@ -760,6 +761,7 @@ https://github.com/cosmos/ibc/tree/master/spec/app/ics-020-fungible-token-transf
 | `amount` | [string](#string) |  | the token amount to be transferred |
 | `sender` | [string](#string) |  | the sender address |
 | `receiver` | [string](#string) |  | the recipient address on the destination chain |
+| `metadata` | [bytes](#bytes) |  | optional metadata |
 
 
 
diff --git a/go.mod b/go.mod
index f4ebcf04b4d..fe4df203c6a 100644
--- a/go.mod
+++ b/go.mod
@@ -24,7 +24,6 @@ require (
 	google.golang.org/genproto v0.0.0-20220725144611-272f38e5d71b
 	google.golang.org/grpc v1.48.0
 	google.golang.org/protobuf v1.28.0
-	gopkg.in/yaml.v2 v2.4.0 // indirect
 )
 
 require (
@@ -119,6 +118,7 @@ require (
 	golang.org/x/term v0.0.0-20220722155259-a9ba230a4035 // indirect
 	golang.org/x/text v0.3.7 // indirect
 	gopkg.in/ini.v1 v1.66.6 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 	nhooyr.io/websocket v1.8.6 // indirect
 )
diff --git a/modules/apps/transfer/client/cli/tx.go b/modules/apps/transfer/client/cli/tx.go
index 74ff6ae802b..85c012da865 100644
--- a/modules/apps/transfer/client/cli/tx.go
+++ b/modules/apps/transfer/client/cli/tx.go
@@ -22,6 +22,7 @@ const (
 	flagPacketTimeoutHeight    = "packet-timeout-height"
 	flagPacketTimeoutTimestamp = "packet-timeout-timestamp"
 	flagAbsoluteTimeouts       = "absolute-timeouts"
+	flagMetadata               = "metadata"
 )
 
 // NewTransferTxCmd returns the command to create a NewMsgTransfer transaction
@@ -76,6 +77,11 @@ corresponding to the counterparty channel. Any timeout set to 0 is disabled.`),
 				return err
 			}
 
+			metadataStr, err := cmd.Flags().GetString(flagMetadata)
+			if err != nil {
+				return err
+			}
+
 			// if the timeouts are not absolute, retrieve latest block height and block timestamp
 			// for the consensus state connected to the destination port/channel
 			if !absoluteTimeouts {
@@ -113,6 +119,8 @@ corresponding to the counterparty channel. Any timeout set to 0 is disabled.`),
 			msg := types.NewMsgTransfer(
 				srcPort, srcChannel, coin, sender, receiver, timeoutHeight, timeoutTimestamp,
 			)
+			msg.Metadata = []byte(metadataStr)
+
 			return tx.GenerateOrBroadcastTxCLI(clientCtx, cmd.Flags(), msg)
 		},
 	}
@@ -120,6 +128,7 @@ corresponding to the counterparty channel. Any timeout set to 0 is disabled.`),
 	cmd.Flags().String(flagPacketTimeoutHeight, types.DefaultRelativePacketTimeoutHeight, "Packet timeout block height. The timeout is disabled when set to 0-0.")
 	cmd.Flags().Uint64(flagPacketTimeoutTimestamp, types.DefaultRelativePacketTimeoutTimestamp, "Packet timeout timestamp in nanoseconds. Default is 10 minutes. The timeout is disabled when set to 0.")
 	cmd.Flags().Bool(flagAbsoluteTimeouts, false, "Timeout flags are used as absolute timeouts.")
+	cmd.Flags().String(flagMetadata, "", "Metadata to be sent along with the packet. The CLI accepts only strings here but you can construct a packet with arbitrary bytes via code.")
 	flags.AddTxFlagsToCmd(cmd)
 
 	return cmd
diff --git a/modules/apps/transfer/keeper/msg_server.go b/modules/apps/transfer/keeper/msg_server.go
index 84c4c6d59ce..77c83a2f3e5 100644
--- a/modules/apps/transfer/keeper/msg_server.go
+++ b/modules/apps/transfer/keeper/msg_server.go
@@ -20,7 +20,7 @@ func (k Keeper) Transfer(goCtx context.Context, msg *types.MsgTransfer) (*types.
 
 	sequence, err := k.sendTransfer(
 		ctx, msg.SourcePort, msg.SourceChannel, msg.Token, sender, msg.Receiver, msg.TimeoutHeight, msg.TimeoutTimestamp,
-	)
+		msg.Metadata)
 	if err != nil {
 		return nil, err
 	}
diff --git a/modules/apps/transfer/keeper/msg_server_test.go b/modules/apps/transfer/keeper/msg_server_test.go
index f884413aa96..e09d326aa84 100644
--- a/modules/apps/transfer/keeper/msg_server_test.go
+++ b/modules/apps/transfer/keeper/msg_server_test.go
@@ -55,6 +55,7 @@ func (suite *KeeperTestSuite) TestMsgTransfer() {
 			coin, suite.chainA.SenderAccount.GetAddress().String(), suite.chainB.SenderAccount.GetAddress().String(),
 			suite.chainB.GetTimeoutHeight(), 0, // only use timeout height
 		)
+		msg.Metadata = []byte("custom metadata")
 
 		tc.malleate()
 
diff --git a/modules/apps/transfer/keeper/relay.go b/modules/apps/transfer/keeper/relay.go
index 3716d7cccb3..96527af63dc 100644
--- a/modules/apps/transfer/keeper/relay.go
+++ b/modules/apps/transfer/keeper/relay.go
@@ -69,6 +69,7 @@ func (k Keeper) SendTransfer(
 		receiver,
 		timeoutHeight,
 		timeoutTimestamp,
+		nil,
 	)
 	return err
 }
@@ -83,6 +84,7 @@ func (k Keeper) sendTransfer(
 	receiver string,
 	timeoutHeight clienttypes.Height,
 	timeoutTimestamp uint64,
+	metadata []byte,
 ) (uint64, error) {
 	if !k.GetSendEnabled(ctx) {
 		return 0, types.ErrSendDisabled
@@ -175,6 +177,7 @@ func (k Keeper) sendTransfer(
 	packetData := types.NewFungibleTokenPacketData(
 		fullDenomPath, token.Amount.String(), sender.String(), receiver,
 	)
+	packetData.Metadata = metadata
 
 	packet := channeltypes.NewPacket(
 		packetData.GetBytes(),
diff --git a/modules/apps/transfer/keeper/relay_test.go b/modules/apps/transfer/keeper/relay_test.go
index 5a2806b1e8b..1bac750a713 100644
--- a/modules/apps/transfer/keeper/relay_test.go
+++ b/modules/apps/transfer/keeper/relay_test.go
@@ -34,13 +34,15 @@ func (suite *KeeperTestSuite) TestSendTransfer() {
 				suite.coordinator.CreateTransferChannels(path)
 				amount = sdk.NewCoin(sdk.DefaultBondDenom, sdk.NewInt(100))
 			}, true, true},
-		{"successful transfer with coin from counterparty chain",
+		{
+			"successful transfer with coin from counterparty chain",
 			func() {
 				// send coin from chainA back to chainB
 				suite.coordinator.CreateTransferChannels(path)
 				amount = types.GetTransferCoin(path.EndpointA.ChannelConfig.PortID, path.EndpointA.ChannelID, sdk.DefaultBondDenom, sdk.NewInt(100))
 			}, false, true},
-		{"source channel not found",
+		{
+			"source channel not found",
 			func() {
 				// channel references wrong ID
 				suite.coordinator.CreateTransferChannels(path)
@@ -59,16 +61,14 @@ func (suite *KeeperTestSuite) TestSendTransfer() {
 				)
 				suite.chainA.CreateChannelCapability(suite.chainA.GetSimApp().ScopedIBCMockKeeper, path.EndpointA.ChannelConfig.PortID, path.EndpointA.ChannelID)
 				amount = sdk.NewCoin(sdk.DefaultBondDenom, sdk.NewInt(100))
-			}, true, false,
-		},
+			}, true, false},
 		{
 			"transfer failed - sender account is blocked",
 			func() {
 				suite.coordinator.CreateTransferChannels(path)
 				amount = sdk.NewCoin(sdk.DefaultBondDenom, sdk.NewInt(100))
 				sender = suite.chainA.GetSimApp().AccountKeeper.GetModuleAddress(types.ModuleName)
-			}, true, false,
-		},
+			}, true, false},
 		// createOutgoingPacket tests
 		// - source chain
 		{"send coin failed",
@@ -149,6 +149,7 @@ func (suite *KeeperTestSuite) TestOnRecvPacket() {
 		trace    types.DenomTrace
 		amount   sdk.Int
 		receiver string
+		metadata []byte
 	)
 
 	testCases := []struct {
@@ -158,7 +159,13 @@ func (suite *KeeperTestSuite) TestOnRecvPacket() {
 		expPass      bool
 	}{
 		{"success receive on source chain", func() {}, true, true},
+		{"success receive on source chain with metadata", func() {
+			metadata = []byte("metadata")
+		}, true, true},
 		{"success receive with coin from another chain as source", func() {}, false, true},
+		{"success receive with coin from another chain as source with metadata", func() {
+			metadata = []byte("metadata")
+		}, false, true},
 		{"empty coin", func() {
 			trace = types.DenomTrace{}
 			amount = sdk.ZeroInt()
@@ -199,6 +206,7 @@ func (suite *KeeperTestSuite) TestOnRecvPacket() {
 			suite.coordinator.Setup(path)
 			receiver = suite.chainB.SenderAccount.GetAddress().String() // must be explicitly changed in malleate
 
+			metadata = []byte{}      // can be explicitly changed in malleate
 			amount = sdk.NewInt(100) // must be explicitly changed in malleate
 			seq := uint64(1)
 
@@ -226,12 +234,14 @@ func (suite *KeeperTestSuite) TestOnRecvPacket() {
 
 			// send coin from chainA to chainB
 			transferMsg := types.NewMsgTransfer(path.EndpointA.ChannelConfig.PortID, path.EndpointA.ChannelID, sdk.NewCoin(trace.IBCDenom(), amount), suite.chainA.SenderAccount.GetAddress().String(), receiver, clienttypes.NewHeight(0, 110), 0)
+			transferMsg.Metadata = metadata
 			_, err := suite.chainA.SendMsgs(transferMsg)
 			suite.Require().NoError(err) // message committed
 
 			tc.malleate()
 
 			data := types.NewFungibleTokenPacketData(trace.GetFullDenomPath(), amount.String(), suite.chainA.SenderAccount.GetAddress().String(), receiver)
+			data.Metadata = metadata
 			packet := channeltypes.NewPacket(data.GetBytes(), seq, path.EndpointA.ChannelConfig.PortID, path.EndpointA.ChannelID, path.EndpointB.ChannelConfig.PortID, path.EndpointB.ChannelID, clienttypes.NewHeight(0, 100), 0)
 
 			err = suite.chainB.GetSimApp().TransferKeeper.OnRecvPacket(suite.chainB.GetContext(), packet, data)
diff --git a/modules/apps/transfer/module.go b/modules/apps/transfer/module.go
index 68123135f9a..4cf8bb65db4 100644
--- a/modules/apps/transfer/module.go
+++ b/modules/apps/transfer/module.go
@@ -2,6 +2,7 @@ package transfer
 
 import (
 	"context"
+	"encoding/hex"
 	"encoding/json"
 	"fmt"
 	"math"
@@ -354,6 +355,7 @@ func (am AppModule) OnRecvPacket(
 			sdk.NewAttribute(types.AttributeKeyReceiver, data.Receiver),
 			sdk.NewAttribute(types.AttributeKeyDenom, data.Denom),
 			sdk.NewAttribute(types.AttributeKeyAmount, data.Amount),
+			sdk.NewAttribute(types.AttributeKeyMetadata, hex.EncodeToString(data.Metadata)),
 			sdk.NewAttribute(types.AttributeKeyAckSuccess, fmt.Sprintf("%t", ack.Success())),
 		),
 	)
@@ -390,6 +392,7 @@ func (am AppModule) OnAcknowledgementPacket(
 			sdk.NewAttribute(types.AttributeKeyReceiver, data.Receiver),
 			sdk.NewAttribute(types.AttributeKeyDenom, data.Denom),
 			sdk.NewAttribute(types.AttributeKeyAmount, data.Amount),
+			sdk.NewAttribute(types.AttributeKeyMetadata, hex.EncodeToString(data.Metadata)),
 			sdk.NewAttribute(types.AttributeKeyAck, ack.String()),
 		),
 	)
@@ -436,6 +439,7 @@ func (am AppModule) OnTimeoutPacket(
 			sdk.NewAttribute(types.AttributeKeyRefundReceiver, data.Sender),
 			sdk.NewAttribute(types.AttributeKeyRefundDenom, data.Denom),
 			sdk.NewAttribute(types.AttributeKeyRefundAmount, data.Amount),
+			sdk.NewAttribute(types.AttributeKeyMetadata, hex.EncodeToString(data.Metadata)),
 		),
 	)
 
diff --git a/modules/apps/transfer/spec/04_messages.md b/modules/apps/transfer/spec/04_messages.md
index 611e2423da7..b3808054353 100644
--- a/modules/apps/transfer/spec/04_messages.md
+++ b/modules/apps/transfer/spec/04_messages.md
@@ -17,6 +17,7 @@ type MsgTransfer struct {
   Receiver          string
   TimeoutHeight     ibcexported.Height
   TimeoutTimestamp  uint64
+  Metadata          []byte
 }
 ```
 
diff --git a/modules/apps/transfer/spec/05_events.md b/modules/apps/transfer/spec/05_events.md
index 51b49da4602..46343198bc6 100644
--- a/modules/apps/transfer/spec/05_events.md
+++ b/modules/apps/transfer/spec/05_events.md
@@ -22,6 +22,7 @@ order: 5
 | fungible_token_packet | denom         | {denom}         |
 | fungible_token_packet | amount        | {amount}        |
 | fungible_token_packet | success       | {ackSuccess}    |
+| fungible_token_packet | metadata      | {metadata}      |
 | denomination_trace    | trace_hash    | {hex_hash}      |
 
 ## OnAcknowledgePacket callback
@@ -32,6 +33,8 @@ order: 5
 | fungible_token_packet | receiver        | {receiver}        |
 | fungible_token_packet | denom           | {denom}           |
 | fungible_token_packet | amount          | {amount}          |
+| fungible_token_packet | metadata        | {metadata}        |
+| fungible_token_packet | acknowledgement | {ack.String()}    |
 | fungible_token_packet | success | error | {ack.Response}    |
 
 ## OnTimeoutPacket callback
@@ -42,3 +45,4 @@ order: 5
 | fungible_token_packet | refund_receiver | {receiver}      |
 | fungible_token_packet | denom           | {denom}         |
 | fungible_token_packet | amount          | {amount}        |
+| fungible_token_packet | metadata        | {metadata}      |
diff --git a/modules/apps/transfer/types/events.go b/modules/apps/transfer/types/events.go
index a3ed5b413c7..5cc87f11797 100644
--- a/modules/apps/transfer/types/events.go
+++ b/modules/apps/transfer/types/events.go
@@ -18,4 +18,5 @@ const (
 	AttributeKeyAck            = "acknowledgement"
 	AttributeKeyAckError       = "error"
 	AttributeKeyTraceHash      = "trace_hash"
+	AttributeKeyMetadata       = "metadata"
 )
diff --git a/modules/apps/transfer/types/msgs.go b/modules/apps/transfer/types/msgs.go
index 12cc8ab1574..169ffe9ca36 100644
--- a/modules/apps/transfer/types/msgs.go
+++ b/modules/apps/transfer/types/msgs.go
@@ -15,6 +15,7 @@ const (
 )
 
 // NewMsgTransfer creates a new MsgTransfer instance
+//
 //nolint:interfacer
 func NewMsgTransfer(
 	sourcePort, sourceChannel string,
diff --git a/modules/apps/transfer/types/packet.pb.go b/modules/apps/transfer/types/packet.pb.go
index f3b3f59825e..8ff01154f9c 100644
--- a/modules/apps/transfer/types/packet.pb.go
+++ b/modules/apps/transfer/types/packet.pb.go
@@ -34,6 +34,8 @@ type FungibleTokenPacketData struct {
 	Sender string `protobuf:"bytes,3,opt,name=sender,proto3" json:"sender,omitempty"`
 	// the recipient address on the destination chain
 	Receiver string `protobuf:"bytes,4,opt,name=receiver,proto3" json:"receiver,omitempty"`
+	// optional metadata
+	Metadata []byte `protobuf:"bytes,5,opt,name=metadata,proto3" json:"metadata,omitempty"`
 }
 
 func (m *FungibleTokenPacketData) Reset()         { *m = FungibleTokenPacketData{} }
@@ -97,6 +99,13 @@ func (m *FungibleTokenPacketData) GetReceiver() string {
 	return ""
 }
 
+func (m *FungibleTokenPacketData) GetMetadata() []byte {
+	if m != nil {
+		return m.Metadata
+	}
+	return nil
+}
+
 func init() {
 	proto.RegisterType((*FungibleTokenPacketData)(nil), "ibc.applications.transfer.v2.FungibleTokenPacketData")
 }
@@ -106,22 +115,24 @@ func init() {
 }
 
 var fileDescriptor_653ca2ce9a5ca313 = []byte{
-	// 240 bytes of a gzipped FileDescriptorProto
-	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x4c, 0x8f, 0xbf, 0x4a, 0xc5, 0x30,
-	0x14, 0x87, 0x1b, 0xff, 0x5c, 0x34, 0x63, 0x11, 0x2d, 0x22, 0x41, 0x9c, 0x74, 0x30, 0x81, 0xeb,
-	0xe0, 0x2e, 0xe2, 0xac, 0xe2, 0xe4, 0x96, 0xa4, 0xc7, 0x1a, 0x6e, 0x93, 0x13, 0x92, 0xb4, 0x20,
-	0xbe, 0x84, 0x8f, 0xe5, 0x78, 0x47, 0x47, 0x69, 0x5f, 0x44, 0x9a, 0xaa, 0xdc, 0xf1, 0xfb, 0xce,
-	0xef, 0x0c, 0x1f, 0xbd, 0x30, 0x4a, 0x0b, 0xe9, 0x7d, 0x6b, 0xb4, 0x4c, 0x06, 0x5d, 0x14, 0x29,
-	0x48, 0x17, 0x5f, 0x20, 0x88, 0x7e, 0x29, 0xbc, 0xd4, 0x2b, 0x48, 0xdc, 0x07, 0x4c, 0x58, 0x9e,
-	0x18, 0xa5, 0xf9, 0xe6, 0x94, 0xff, 0x4d, 0x79, 0xbf, 0x3c, 0x7b, 0xa7, 0x47, 0x77, 0x9d, 0x6b,
-	0x8c, 0x6a, 0xe1, 0x09, 0x57, 0xe0, 0xee, 0xf3, 0xeb, 0xad, 0x4c, 0xb2, 0x3c, 0xa0, 0xbb, 0x35,
-	0x38, 0xb4, 0x15, 0x39, 0x25, 0xe7, 0xfb, 0x8f, 0x33, 0x94, 0x87, 0x74, 0x21, 0x2d, 0x76, 0x2e,
-	0x55, 0x5b, 0x59, 0xff, 0xd2, 0xe4, 0x23, 0xb8, 0x1a, 0x42, 0xb5, 0x3d, 0xfb, 0x99, 0xca, 0x63,
-	0xba, 0x17, 0x40, 0x83, 0xe9, 0x21, 0x54, 0x3b, 0xf9, 0xf2, 0xcf, 0x37, 0x0f, 0x9f, 0x03, 0x23,
-	0xeb, 0x81, 0x91, 0xef, 0x81, 0x91, 0x8f, 0x91, 0x15, 0xeb, 0x91, 0x15, 0x5f, 0x23, 0x2b, 0x9e,
-	0xaf, 0x1b, 0x93, 0x5e, 0x3b, 0xc5, 0x35, 0x5a, 0xa1, 0x31, 0x5a, 0x8c, 0xc2, 0x28, 0x7d, 0xd9,
-	0xe0, 0x94, 0x67, 0xb1, 0xee, 0x5a, 0x88, 0x53, 0xff, 0x46, 0x77, 0x7a, 0xf3, 0x10, 0xd5, 0x22,
-	0x47, 0x5f, 0xfd, 0x04, 0x00, 0x00, 0xff, 0xff, 0x9d, 0x75, 0xf2, 0x46, 0x21, 0x01, 0x00, 0x00,
+	// 258 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x4c, 0x90, 0xb1, 0x4e, 0xc3, 0x30,
+	0x10, 0x86, 0x6b, 0xa0, 0x15, 0x44, 0x4c, 0x11, 0x82, 0x08, 0x21, 0xab, 0x62, 0x2a, 0x03, 0xb1,
+	0x54, 0x06, 0x76, 0x84, 0x98, 0xa1, 0x62, 0x62, 0xb3, 0x9d, 0x23, 0x58, 0x8d, 0x7d, 0x96, 0x7d,
+	0x89, 0xc4, 0x5b, 0xb0, 0xf1, 0x4a, 0x8c, 0x1d, 0x19, 0x51, 0xf2, 0x22, 0x28, 0x09, 0x54, 0x1d,
+	0xbf, 0xff, 0xff, 0x6f, 0xb8, 0x2f, 0xb9, 0x32, 0x4a, 0x0b, 0xe9, 0x7d, 0x65, 0xb4, 0x24, 0x83,
+	0x2e, 0x0a, 0x0a, 0xd2, 0xc5, 0x57, 0x08, 0xa2, 0x59, 0x0a, 0x2f, 0xf5, 0x1a, 0x28, 0xf7, 0x01,
+	0x09, 0xd3, 0x0b, 0xa3, 0x74, 0xbe, 0x3b, 0xcd, 0xff, 0xa7, 0x79, 0xb3, 0xbc, 0xfc, 0x64, 0xc9,
+	0xd9, 0x43, 0xed, 0x4a, 0xa3, 0x2a, 0x78, 0xc6, 0x35, 0xb8, 0xc7, 0xe1, 0xf6, 0x5e, 0x92, 0x4c,
+	0x4f, 0x92, 0x69, 0x01, 0x0e, 0x6d, 0xc6, 0xe6, 0x6c, 0x71, 0xb4, 0x1a, 0x21, 0x3d, 0x4d, 0x66,
+	0xd2, 0x62, 0xed, 0x28, 0xdb, 0x1b, 0xe2, 0x3f, 0xea, 0xf3, 0x08, 0xae, 0x80, 0x90, 0xed, 0x8f,
+	0xf9, 0x48, 0xe9, 0x79, 0x72, 0x18, 0x40, 0x83, 0x69, 0x20, 0x64, 0x07, 0x43, 0xb3, 0xe5, 0xbe,
+	0xb3, 0x40, 0xb2, 0x90, 0x24, 0xb3, 0xe9, 0x9c, 0x2d, 0x8e, 0x57, 0x5b, 0xbe, 0x7b, 0xfa, 0x6a,
+	0x39, 0xdb, 0xb4, 0x9c, 0xfd, 0xb4, 0x9c, 0x7d, 0x74, 0x7c, 0xb2, 0xe9, 0xf8, 0xe4, 0xbb, 0xe3,
+	0x93, 0x97, 0xdb, 0xd2, 0xd0, 0x5b, 0xad, 0x72, 0x8d, 0x56, 0x68, 0x8c, 0x16, 0xa3, 0x30, 0x4a,
+	0x5f, 0x97, 0xd8, 0xff, 0x6e, 0xb1, 0xa8, 0x2b, 0x88, 0xbd, 0x9c, 0x1d, 0x29, 0xf4, 0xee, 0x21,
+	0xaa, 0xd9, 0x60, 0xe4, 0xe6, 0x37, 0x00, 0x00, 0xff, 0xff, 0x5d, 0x3d, 0x15, 0x2a, 0x3e, 0x01,
+	0x00, 0x00,
 }
 
 func (m *FungibleTokenPacketData) Marshal() (dAtA []byte, err error) {
@@ -144,6 +155,13 @@ func (m *FungibleTokenPacketData) MarshalToSizedBuffer(dAtA []byte) (int, error)
 	_ = i
 	var l int
 	_ = l
+	if len(m.Metadata) > 0 {
+		i -= len(m.Metadata)
+		copy(dAtA[i:], m.Metadata)
+		i = encodeVarintPacket(dAtA, i, uint64(len(m.Metadata)))
+		i--
+		dAtA[i] = 0x2a
+	}
 	if len(m.Receiver) > 0 {
 		i -= len(m.Receiver)
 		copy(dAtA[i:], m.Receiver)
@@ -208,6 +226,10 @@ func (m *FungibleTokenPacketData) Size() (n int) {
 	if l > 0 {
 		n += 1 + l + sovPacket(uint64(l))
 	}
+	l = len(m.Metadata)
+	if l > 0 {
+		n += 1 + l + sovPacket(uint64(l))
+	}
 	return n
 }
 
@@ -374,6 +396,40 @@ func (m *FungibleTokenPacketData) Unmarshal(dAtA []byte) error {
 			}
 			m.Receiver = string(dAtA[iNdEx:postIndex])
 			iNdEx = postIndex
+		case 5:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Metadata", wireType)
+			}
+			var byteLen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowPacket
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				byteLen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if byteLen < 0 {
+				return ErrInvalidLengthPacket
+			}
+			postIndex := iNdEx + byteLen
+			if postIndex < 0 {
+				return ErrInvalidLengthPacket
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Metadata = append(m.Metadata[:0], dAtA[iNdEx:postIndex]...)
+			if m.Metadata == nil {
+				m.Metadata = []byte{}
+			}
+			iNdEx = postIndex
 		default:
 			iNdEx = preIndex
 			skippy, err := skipPacket(dAtA[iNdEx:])
diff --git a/modules/apps/transfer/types/tx.pb.go b/modules/apps/transfer/types/tx.pb.go
index ba9f0397b36..b2cacf0fab6 100644
--- a/modules/apps/transfer/types/tx.pb.go
+++ b/modules/apps/transfer/types/tx.pb.go
@@ -50,6 +50,8 @@ type MsgTransfer struct {
 	// Timeout timestamp (in nanoseconds) relative to the current block timestamp.
 	// The timeout is disabled when set to 0.
 	TimeoutTimestamp uint64 `protobuf:"varint,7,opt,name=timeout_timestamp,json=timeoutTimestamp,proto3" json:"timeout_timestamp,omitempty" yaml:"timeout_timestamp"`
+	// optional metadata
+	Metadata []byte `protobuf:"bytes,8,opt,name=metadata,proto3" json:"metadata,omitempty"`
 }
 
 func (m *MsgTransfer) Reset()         { *m = MsgTransfer{} }
@@ -141,39 +143,40 @@ func init() {
 }
 
 var fileDescriptor_7401ed9bed2f8e09 = []byte{
-	// 508 bytes of a gzipped FileDescriptorProto
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-	0x48, 0xe1, 0xc0, 0xae, 0x1c, 0x84, 0x2a, 0xf5, 0x84, 0xd2, 0x0b, 0x1c, 0x2a, 0x81, 0xd5, 0x13,
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-	0x5c, 0x10, 0xa7, 0xec, 0xcc, 0xfc, 0x26, 0x7f, 0xff, 0x77, 0x66, 0xc9, 0x53, 0x91, 0x70, 0x16,
-	0xe7, 0xf9, 0x54, 0xf0, 0x58, 0x0b, 0x94, 0x8a, 0xe9, 0x22, 0x96, 0xea, 0x23, 0x14, 0xac, 0x0c,
-	0x99, 0xfe, 0x42, 0xf3, 0x02, 0x35, 0x3a, 0xc7, 0x22, 0xe1, 0x74, 0x1b, 0xa3, 0x6b, 0x8c, 0x96,
-	0x61, 0xff, 0x51, 0x8a, 0x29, 0x56, 0x20, 0x33, 0xa7, 0xba, 0xa7, 0xef, 0x71, 0x54, 0x19, 0x2a,
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-	0x63, 0x01, 0x8c, 0x4f, 0x05, 0x48, 0x6d, 0x04, 0xeb, 0x53, 0x0d, 0x04, 0xdf, 0x5b, 0xa4, 0x77,
-	0xae, 0xd2, 0x8b, 0x46, 0xc9, 0x39, 0x21, 0x3d, 0x85, 0xb3, 0x82, 0xc3, 0x65, 0x8e, 0x85, 0x76,
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-	0x31, 0x88, 0x48, 0x1d, 0xbd, 0xc5, 0x42, 0x3b, 0xaf, 0xc8, 0x41, 0x53, 0xe3, 0x93, 0x58, 0x4a,
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-	0xe8, 0x88, 0xd6, 0xde, 0xa8, 0xf1, 0x46, 0x1b, 0x6f, 0xf4, 0x0c, 0x85, 0x1c, 0xb7, 0x6f, 0xe7,
-	0xbe, 0x15, 0xd5, 0xb4, 0x73, 0x48, 0x3a, 0x0a, 0xe4, 0x15, 0x14, 0x6e, 0xdb, 0x08, 0x46, 0x4d,
-	0xe4, 0xf4, 0x49, 0xb7, 0x00, 0x0e, 0xa2, 0x84, 0xc2, 0xdd, 0xab, 0x2a, 0x9b, 0xd8, 0xf9, 0x40,
-	0x0e, 0xb4, 0xc8, 0x00, 0x67, 0xfa, 0x72, 0x02, 0x22, 0x9d, 0x68, 0xb7, 0x53, 0x69, 0xf6, 0xa9,
-	0x99, 0x81, 0xb9, 0x2f, 0xda, 0xdc, 0x52, 0x19, 0xd2, 0xd7, 0x15, 0x31, 0x7e, 0x62, 0x44, 0xff,
-	0x98, 0xd9, 0xed, 0x0f, 0xa2, 0xfd, 0x26, 0x51, 0xd3, 0xce, 0x1b, 0xf2, 0x60, 0x4d, 0x98, 0x5f,
-	0xa5, 0xe3, 0x2c, 0x77, 0xff, 0x1f, 0xd8, 0xc3, 0xf6, 0xf8, 0x78, 0x35, 0xf7, 0xdd, 0xdd, 0x3f,
-	0xd9, 0x20, 0x41, 0x74, 0xbf, 0xc9, 0x5d, 0xac, 0x53, 0xa7, 0xdd, 0xaf, 0x37, 0xbe, 0xf5, 0xeb,
-	0xc6, 0xb7, 0x82, 0x90, 0x3c, 0xdc, 0x9a, 0x55, 0x04, 0x2a, 0x47, 0xa9, 0xc0, 0x38, 0x55, 0xf0,
-	0x79, 0x06, 0x92, 0x43, 0x35, 0xb0, 0x76, 0xb4, 0x89, 0x47, 0x48, 0x5a, 0xe7, 0x2a, 0x75, 0x26,
-	0xa4, 0xbb, 0x19, 0xf1, 0x33, 0xfa, 0xb7, 0x45, 0xa3, 0x5b, 0x0a, 0xfd, 0xf0, 0x9f, 0xd1, 0xf5,
-	0xc7, 0x8c, 0xdf, 0xdd, 0x2e, 0x3c, 0xfb, 0x6e, 0xe1, 0xd9, 0x3f, 0x17, 0x9e, 0xfd, 0x6d, 0xe9,
-	0x59, 0x77, 0x4b, 0xcf, 0xfa, 0xb1, 0xf4, 0xac, 0xf7, 0x27, 0xa9, 0xd0, 0x93, 0x59, 0x42, 0x39,
-	0x66, 0xac, 0x59, 0x5b, 0x91, 0xf0, 0xe7, 0x29, 0xb2, 0x72, 0xc4, 0x32, 0xbc, 0x9a, 0x4d, 0x41,
-	0x99, 0x67, 0xb2, 0xf5, 0x3c, 0xf4, 0x75, 0x0e, 0x2a, 0xe9, 0x54, 0xab, 0xfa, 0xe2, 0x77, 0x00,
-	0x00, 0x00, 0xff, 0xff, 0x75, 0xd4, 0x23, 0x61, 0x48, 0x03, 0x00, 0x00,
+	// 520 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x8c, 0x93, 0x31, 0x6f, 0xd3, 0x40,
+	0x14, 0xc7, 0x6d, 0x92, 0x86, 0x70, 0xa1, 0x15, 0x18, 0xa8, 0xdc, 0xa8, 0xd8, 0x91, 0x25, 0xa4,
+	0x30, 0x70, 0x27, 0x07, 0xa1, 0x4a, 0x9d, 0x50, 0xba, 0xc0, 0x50, 0x09, 0xac, 0x4e, 0x2c, 0xe5,
+	0x7c, 0x79, 0x38, 0x27, 0xe2, 0x3b, 0xe3, 0xbb, 0x58, 0xf4, 0x1b, 0x30, 0xf2, 0x11, 0xfa, 0x69,
+	0x50, 0xc7, 0x8e, 0x4c, 0x11, 0x4a, 0x16, 0xe6, 0x7c, 0x02, 0x74, 0xb6, 0x13, 0x9c, 0x05, 0x31,
+	0xe5, 0xfe, 0xef, 0xfd, 0x5e, 0xfe, 0x7e, 0xf7, 0xde, 0xa1, 0x67, 0x3c, 0x66, 0x84, 0x66, 0xd9,
+	0x8c, 0x33, 0xaa, 0xb9, 0x14, 0x8a, 0xe8, 0x9c, 0x0a, 0xf5, 0x09, 0x72, 0x52, 0x84, 0x44, 0x7f,
+	0xc5, 0x59, 0x2e, 0xb5, 0x74, 0x8e, 0x79, 0xcc, 0x70, 0x13, 0xc3, 0x1b, 0x0c, 0x17, 0x61, 0xff,
+	0x71, 0x22, 0x13, 0x59, 0x82, 0xc4, 0x9c, 0xaa, 0x9a, 0xbe, 0xc7, 0xa4, 0x4a, 0xa5, 0x22, 0x31,
+	0x55, 0x40, 0x8a, 0x30, 0x06, 0x4d, 0x43, 0xc2, 0x24, 0x17, 0x75, 0xde, 0x37, 0xd6, 0x4c, 0xe6,
+	0x40, 0xd8, 0x8c, 0x83, 0xd0, 0xc6, 0xb0, 0x3a, 0x55, 0x40, 0xf0, 0xa3, 0x85, 0x7a, 0xe7, 0x2a,
+	0xb9, 0xa8, 0x9d, 0x9c, 0x13, 0xd4, 0x53, 0x72, 0x9e, 0x33, 0xb8, 0xcc, 0x64, 0xae, 0x5d, 0x7b,
+	0x60, 0x0f, 0xef, 0x8d, 0x0f, 0xd7, 0x0b, 0xdf, 0xb9, 0xa2, 0xe9, 0xec, 0x34, 0x68, 0x24, 0x83,
+	0x08, 0x55, 0xea, 0x9d, 0xcc, 0xb5, 0xf3, 0x1a, 0x1d, 0xd4, 0x39, 0x36, 0xa5, 0x42, 0xc0, 0xcc,
+	0xbd, 0x53, 0xd6, 0x1e, 0xad, 0x17, 0xfe, 0x93, 0x9d, 0xda, 0x3a, 0x1f, 0x44, 0xfb, 0x55, 0xe0,
+	0xac, 0xd2, 0xce, 0x2b, 0xb4, 0xa7, 0xe5, 0x67, 0x10, 0x6e, 0x6b, 0x60, 0x0f, 0x7b, 0xa3, 0x23,
+	0x5c, 0xf5, 0x86, 0x4d, 0x6f, 0xb8, 0xee, 0x0d, 0x9f, 0x49, 0x2e, 0xc6, 0xed, 0x9b, 0x85, 0x6f,
+	0x45, 0x15, 0xed, 0x1c, 0xa2, 0x8e, 0x02, 0x31, 0x81, 0xdc, 0x6d, 0x1b, 0xc3, 0xa8, 0x56, 0x4e,
+	0x1f, 0x75, 0x73, 0x60, 0xc0, 0x0b, 0xc8, 0xdd, 0xbd, 0x32, 0xb3, 0xd5, 0xce, 0x47, 0x74, 0xa0,
+	0x79, 0x0a, 0x72, 0xae, 0x2f, 0xa7, 0xc0, 0x93, 0xa9, 0x76, 0x3b, 0xa5, 0x67, 0x1f, 0x9b, 0x19,
+	0x98, 0xfb, 0xc2, 0xf5, 0x2d, 0x15, 0x21, 0x7e, 0x53, 0x12, 0xe3, 0xa7, 0xc6, 0xf4, 0x6f, 0x33,
+	0xbb, 0xf5, 0x41, 0xb4, 0x5f, 0x07, 0x2a, 0xda, 0x79, 0x8b, 0x1e, 0x6e, 0x08, 0xf3, 0xab, 0x34,
+	0x4d, 0x33, 0xf7, 0xee, 0xc0, 0x1e, 0xb6, 0xc7, 0xc7, 0xeb, 0x85, 0xef, 0xee, 0xfe, 0xc9, 0x16,
+	0x09, 0xa2, 0x07, 0x75, 0xec, 0x62, 0x13, 0x32, 0x8d, 0xa4, 0xa0, 0xe9, 0x84, 0x6a, 0xea, 0x76,
+	0x07, 0xf6, 0xf0, 0x7e, 0xb4, 0xd5, 0xa7, 0xdd, 0x6f, 0xd7, 0xbe, 0xf5, 0xfb, 0xda, 0xb7, 0x82,
+	0x10, 0x3d, 0x6a, 0xcc, 0x31, 0x02, 0x95, 0x49, 0xa1, 0xc0, 0x14, 0x2b, 0xf8, 0x32, 0x07, 0xc1,
+	0xa0, 0x1c, 0x66, 0x3b, 0xda, 0xea, 0x91, 0x44, 0xad, 0x73, 0x95, 0x38, 0x53, 0xd4, 0xdd, 0x8e,
+	0xff, 0x39, 0xfe, 0xd7, 0x12, 0xe2, 0x86, 0x43, 0x3f, 0xfc, 0x6f, 0x74, 0xf3, 0x31, 0xe3, 0xf7,
+	0x37, 0x4b, 0xcf, 0xbe, 0x5d, 0x7a, 0xf6, 0xaf, 0xa5, 0x67, 0x7f, 0x5f, 0x79, 0xd6, 0xed, 0xca,
+	0xb3, 0x7e, 0xae, 0x3c, 0xeb, 0xc3, 0x49, 0xc2, 0xf5, 0x74, 0x1e, 0x63, 0x26, 0x53, 0x52, 0xaf,
+	0x34, 0x8f, 0xd9, 0x8b, 0x44, 0x92, 0x62, 0x44, 0x52, 0x39, 0x99, 0xcf, 0x40, 0x99, 0x27, 0xd4,
+	0x78, 0x3a, 0xfa, 0x2a, 0x03, 0x15, 0x77, 0xca, 0x35, 0x7e, 0xf9, 0x27, 0x00, 0x00, 0xff, 0xff,
+	0x7f, 0x1a, 0xac, 0x9b, 0x64, 0x03, 0x00, 0x00,
 }
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -278,6 +281,13 @@ func (m *MsgTransfer) MarshalToSizedBuffer(dAtA []byte) (int, error) {
 	_ = i
 	var l int
 	_ = l
+	if len(m.Metadata) > 0 {
+		i -= len(m.Metadata)
+		copy(dAtA[i:], m.Metadata)
+		i = encodeVarintTx(dAtA, i, uint64(len(m.Metadata)))
+		i--
+		dAtA[i] = 0x42
+	}
 	if m.TimeoutTimestamp != 0 {
 		i = encodeVarintTx(dAtA, i, uint64(m.TimeoutTimestamp))
 		i--
@@ -402,6 +412,10 @@ func (m *MsgTransfer) Size() (n int) {
 	if m.TimeoutTimestamp != 0 {
 		n += 1 + sovTx(uint64(m.TimeoutTimestamp))
 	}
+	l = len(m.Metadata)
+	if l > 0 {
+		n += 1 + l + sovTx(uint64(l))
+	}
 	return n
 }
 
@@ -665,6 +679,40 @@ func (m *MsgTransfer) Unmarshal(dAtA []byte) error {
 					break
 				}
 			}
+		case 8:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Metadata", wireType)
+			}
+			var byteLen int
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowTx
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				byteLen |= int(b&0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			if byteLen < 0 {
+				return ErrInvalidLengthTx
+			}
+			postIndex := iNdEx + byteLen
+			if postIndex < 0 {
+				return ErrInvalidLengthTx
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Metadata = append(m.Metadata[:0], dAtA[iNdEx:postIndex]...)
+			if m.Metadata == nil {
+				m.Metadata = []byte{}
+			}
+			iNdEx = postIndex
 		default:
 			iNdEx = preIndex
 			skippy, err := skipTx(dAtA[iNdEx:])
diff --git a/proto/ibc/applications/transfer/v1/tx.proto b/proto/ibc/applications/transfer/v1/tx.proto
index d571d276a6c..d7396fa4bd5 100644
--- a/proto/ibc/applications/transfer/v1/tx.proto
+++ b/proto/ibc/applications/transfer/v1/tx.proto
@@ -38,6 +38,8 @@ message MsgTransfer {
   // Timeout timestamp (in nanoseconds) relative to the current block timestamp.
   // The timeout is disabled when set to 0.
   uint64 timeout_timestamp = 7 [(gogoproto.moretags) = "yaml:\"timeout_timestamp\""];
+  // optional metadata
+  bytes metadata = 8;
 }
 
 // MsgTransferResponse defines the Msg/Transfer response type.
diff --git a/proto/ibc/applications/transfer/v2/packet.proto b/proto/ibc/applications/transfer/v2/packet.proto
index 593392a9005..953f67128a2 100644
--- a/proto/ibc/applications/transfer/v2/packet.proto
+++ b/proto/ibc/applications/transfer/v2/packet.proto
@@ -16,4 +16,6 @@ message FungibleTokenPacketData {
   string sender = 3;
   // the recipient address on the destination chain
   string receiver = 4;
+  // optional metadata
+  bytes metadata = 5;
 }