From a1878038ca40d117defd3688ad1494e9872b2ffb Mon Sep 17 00:00:00 2001
From: vuong <56973102+nguyenvuong1122000@users.noreply.github.com>
Date: Thu, 21 Apr 2022 23:14:57 +0700
Subject: [PATCH] chore : add selected channel version to
 MsgChanOpenInitResponse and MsgChanOpenTryResponse (#1279)

## Description
 - Add a version field to MsgChannelOpenInitResponse and MsgChannelOpenTryResponse in proto and gen proto
 - Set the selected channel version in the [MsgChannelOpenInitResponse](https://github.com/notional-labs/ibc-go/blob/ed7a082565fadb9ce27067fa1efb56c23fafc8ef/modules/core/keeper/msg_server.go#L197) and [MsgChannelOpenTryResponse](https://github.com/notional-labs/ibc-go/blob/ed7a082565fadb9ce27067fa1efb56c23fafc8ef/modules/core/keeper/msg_server.go#L237)


---

Before we can merge this PR, please make sure that all the following items have been
checked off. If any of the checklist items are not applicable, please leave them but
write a little note why.

- [ ] Targeted PR against correct branch (see [CONTRIBUTING.md](https://github.com/cosmos/ibc-go/blob/master/CONTRIBUTING.md#pr-targeting))
- [ ] Linked to Github issue with discussion and accepted design OR link to spec that describes this work.
- [ ] Code follows the [module structure standards](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules/structure.md).
- [ ] Wrote unit and integration [tests](https://github.com/cosmos/ibc-go/blob/master/CONTRIBUTING.md#testing)
- [ ] Updated relevant documentation (`docs/`) or specification (`x/<module>/spec/`)
- [ ] Added relevant `godoc` [comments](https://blog.golang.org/godoc-documenting-go-code).
- [ ] Added a relevant changelog entry to the `Unreleased` section in `CHANGELOG.md`
- [ ] Re-reviewed `Files changed` in the Github PR explorer
- [ ] Review `Codecov Report` in the comment section below once CI passes


closes: #1204
---
 CHANGELOG.md                             |   3 +-
 docs/ibc/proto-docs.md                   |   6 +
 modules/core/04-channel/keeper/events.go |   2 +
 modules/core/04-channel/types/events.go  |   1 +
 modules/core/04-channel/types/tx.pb.go   | 265 ++++++++++++++++-------
 modules/core/keeper/msg_server.go        |   5 +-
 proto/ibc/core/channel/v1/tx.proto       |   5 +-
 7 files changed, 203 insertions(+), 84 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 59091805154..6b84cecfd72 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -50,7 +50,8 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 * (middleware) [\#1022](https://github.com/cosmos/ibc-go/pull/1022) Add `GetAppVersion` to the ICS4Wrapper interface. This function should be used by IBC applications to obtain their own version since the version set in the channel structure may be wrapped many times by middleware. 
 * (modules/core/04-channel) [\#1160](https://github.com/cosmos/ibc-go/pull/1160) Improve `uint64 -> string` performance in `Logger`.
-* (modules/core/04-channel) [\#1232](https://github.com/cosmos/ibc-go/pull/1232) Updating params on `NewPacketId` and moving to bottom of file.   
+* (modules/core/04-channel) [\#1232](https://github.com/cosmos/ibc-go/pull/1232) Updating params on `NewPacketId` and moving to bottom of file. 
+* (modules/core/04-channel) [\#1279](https://github.com/cosmos/ibc-go/pull/1279) Add selected channel version to MsgChanOpenInitResponse and MsgChanOpenTryResponse. Emit channel version during OpenInit/OpenTry
 
 ### Features
 
diff --git a/docs/ibc/proto-docs.md b/docs/ibc/proto-docs.md
index 297da93f262..cf411ade14c 100644
--- a/docs/ibc/proto-docs.md
+++ b/docs/ibc/proto-docs.md
@@ -2809,6 +2809,7 @@ MsgChannelOpenInitResponse defines the Msg/ChannelOpenInit response type.
 | Field | Type | Label | Description |
 | ----- | ---- | ----- | ----------- |
 | `channel_id` | [string](#string) |  |  |
+| `version` | [string](#string) |  |  |
 
 
 
@@ -2844,6 +2845,11 @@ value will be ignored by core IBC.
 MsgChannelOpenTryResponse defines the Msg/ChannelOpenTry response type.
 
 
+| Field | Type | Label | Description |
+| ----- | ---- | ----- | ----------- |
+| `version` | [string](#string) |  |  |
+
+
 
 
 
diff --git a/modules/core/04-channel/keeper/events.go b/modules/core/04-channel/keeper/events.go
index d299d6afeda..731d298a2ae 100644
--- a/modules/core/04-channel/keeper/events.go
+++ b/modules/core/04-channel/keeper/events.go
@@ -20,6 +20,7 @@ func EmitChannelOpenInitEvent(ctx sdk.Context, portID string, channelID string,
 			sdk.NewAttribute(types.AttributeCounterpartyPortID, channel.Counterparty.PortId),
 			sdk.NewAttribute(types.AttributeCounterpartyChannelID, channel.Counterparty.ChannelId),
 			sdk.NewAttribute(types.AttributeKeyConnectionID, channel.ConnectionHops[0]),
+			sdk.NewAttribute(types.AttributeVersion, channel.Version),
 		),
 	})
 
@@ -41,6 +42,7 @@ func EmitChannelOpenTryEvent(ctx sdk.Context, portID string, channelID string, c
 			sdk.NewAttribute(types.AttributeCounterpartyPortID, channel.Counterparty.PortId),
 			sdk.NewAttribute(types.AttributeCounterpartyChannelID, channel.Counterparty.ChannelId),
 			sdk.NewAttribute(types.AttributeKeyConnectionID, channel.ConnectionHops[0]),
+			sdk.NewAttribute(types.AttributeVersion, channel.Version),
 		),
 	})
 	ctx.EventManager().EmitEvents(sdk.Events{
diff --git a/modules/core/04-channel/types/events.go b/modules/core/04-channel/types/events.go
index 4154b856c5d..e9f909a695d 100644
--- a/modules/core/04-channel/types/events.go
+++ b/modules/core/04-channel/types/events.go
@@ -11,6 +11,7 @@ const (
 	AttributeKeyConnectionID       = "connection_id"
 	AttributeKeyPortID             = "port_id"
 	AttributeKeyChannelID          = "channel_id"
+	AttributeVersion               = "version"
 	AttributeCounterpartyPortID    = "counterparty_port_id"
 	AttributeCounterpartyChannelID = "counterparty_channel_id"
 
diff --git a/modules/core/04-channel/types/tx.pb.go b/modules/core/04-channel/types/tx.pb.go
index 8f9ebe6ec63..fe6f344384d 100644
--- a/modules/core/04-channel/types/tx.pb.go
+++ b/modules/core/04-channel/types/tx.pb.go
@@ -105,6 +105,7 @@ var xxx_messageInfo_MsgChannelOpenInit proto.InternalMessageInfo
 // MsgChannelOpenInitResponse defines the Msg/ChannelOpenInit response type.
 type MsgChannelOpenInitResponse struct {
 	ChannelId string `protobuf:"bytes,1,opt,name=channel_id,json=channelId,proto3" json:"channel_id,omitempty" yaml:"channel_id"`
+	Version   string `protobuf:"bytes,2,opt,name=version,proto3" json:"version,omitempty"`
 }
 
 func (m *MsgChannelOpenInitResponse) Reset()         { *m = MsgChannelOpenInitResponse{} }
@@ -147,6 +148,13 @@ func (m *MsgChannelOpenInitResponse) GetChannelId() string {
 	return ""
 }
 
+func (m *MsgChannelOpenInitResponse) GetVersion() string {
+	if m != nil {
+		return m.Version
+	}
+	return ""
+}
+
 // MsgChannelOpenInit defines a msg sent by a Relayer to try to open a channel
 // on Chain B. The version field within the Channel field has been deprecated. Its
 // value will be ignored by core IBC.
@@ -198,6 +206,7 @@ var xxx_messageInfo_MsgChannelOpenTry proto.InternalMessageInfo
 
 // MsgChannelOpenTryResponse defines the Msg/ChannelOpenTry response type.
 type MsgChannelOpenTryResponse struct {
+	Version string `protobuf:"bytes,1,opt,name=version,proto3" json:"version,omitempty"`
 }
 
 func (m *MsgChannelOpenTryResponse) Reset()         { *m = MsgChannelOpenTryResponse{} }
@@ -233,6 +242,13 @@ func (m *MsgChannelOpenTryResponse) XXX_DiscardUnknown() {
 
 var xxx_messageInfo_MsgChannelOpenTryResponse proto.InternalMessageInfo
 
+func (m *MsgChannelOpenTryResponse) GetVersion() string {
+	if m != nil {
+		return m.Version
+	}
+	return ""
+}
+
 // MsgChannelOpenAck defines a msg sent by a Relayer to Chain A to acknowledge
 // the change of channel state to TRYOPEN on Chain B.
 type MsgChannelOpenAck struct {
@@ -902,87 +918,88 @@ func init() {
 func init() { proto.RegisterFile("ibc/core/channel/v1/tx.proto", fileDescriptor_bc4637e0ac3fc7b7) }
 
 var fileDescriptor_bc4637e0ac3fc7b7 = []byte{
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-	0x00, 0xff, 0xff, 0xec, 0xba, 0x10, 0x62, 0xd2, 0x14, 0x00, 0x00,
+	// 1294 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0xcc, 0x58, 0x4d, 0x6f, 0xe2, 0x56,
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+	0xbe, 0x48, 0x52, 0x2f, 0x2f, 0x93, 0xbe, 0x77, 0x97, 0x49, 0xdf, 0x9f, 0x97, 0x49, 0xdf, 0xc9,
+	0xe3, 0x9a, 0xa8, 0x9d, 0xb6, 0x2b, 0x69, 0x41, 0x6e, 0x66, 0x04, 0x59, 0x6d, 0xca, 0x6a, 0x46,
+	0xac, 0x08, 0x1b, 0x35, 0x39, 0xd3, 0xd9, 0xce, 0x34, 0xe5, 0x6a, 0xbb, 0x81, 0x54, 0xe3, 0xc7,
+	0xe3, 0x83, 0x87, 0x1b, 0xe6, 0xbf, 0x47, 0xad, 0xdb, 0x42, 0x6a, 0x25, 0x84, 0xff, 0x3b, 0x6e,
+	0xff, 0x1b, 0x00, 0x00, 0xff, 0xff, 0x51, 0x2e, 0xf7, 0xe5, 0x06, 0x15, 0x00, 0x00,
 }
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -1478,6 +1495,13 @@ func (m *MsgChannelOpenInitResponse) MarshalToSizedBuffer(dAtA []byte) (int, err
 	_ = i
 	var l int
 	_ = l
+	if len(m.Version) > 0 {
+		i -= len(m.Version)
+		copy(dAtA[i:], m.Version)
+		i = encodeVarintTx(dAtA, i, uint64(len(m.Version)))
+		i--
+		dAtA[i] = 0x12
+	}
 	if len(m.ChannelId) > 0 {
 		i -= len(m.ChannelId)
 		copy(dAtA[i:], m.ChannelId)
@@ -1586,6 +1610,13 @@ func (m *MsgChannelOpenTryResponse) MarshalToSizedBuffer(dAtA []byte) (int, erro
 	_ = i
 	var l int
 	_ = l
+	if len(m.Version) > 0 {
+		i -= len(m.Version)
+		copy(dAtA[i:], m.Version)
+		i = encodeVarintTx(dAtA, i, uint64(len(m.Version)))
+		i--
+		dAtA[i] = 0xa
+	}
 	return len(dAtA) - i, nil
 }
 
@@ -2326,6 +2357,10 @@ func (m *MsgChannelOpenInitResponse) Size() (n int) {
 	if l > 0 {
 		n += 1 + l + sovTx(uint64(l))
 	}
+	l = len(m.Version)
+	if l > 0 {
+		n += 1 + l + sovTx(uint64(l))
+	}
 	return n
 }
 
@@ -2368,6 +2403,10 @@ func (m *MsgChannelOpenTryResponse) Size() (n int) {
 	}
 	var l int
 	_ = l
+	l = len(m.Version)
+	if l > 0 {
+		n += 1 + l + sovTx(uint64(l))
+	}
 	return n
 }
 
@@ -2877,6 +2916,38 @@ func (m *MsgChannelOpenInitResponse) Unmarshal(dAtA []byte) error {
 			}
 			m.ChannelId = string(dAtA[iNdEx:postIndex])
 			iNdEx = postIndex
+		case 2:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Version", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowTx
+				}
+				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 ErrInvalidLengthTx
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex < 0 {
+				return ErrInvalidLengthTx
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Version = string(dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
 		default:
 			iNdEx = preIndex
 			skippy, err := skipTx(dAtA[iNdEx:])
@@ -3205,6 +3276,38 @@ func (m *MsgChannelOpenTryResponse) Unmarshal(dAtA []byte) error {
 			return fmt.Errorf("proto: MsgChannelOpenTryResponse: illegal tag %d (wire type %d)", fieldNum, wire)
 		}
 		switch fieldNum {
+		case 1:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field Version", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowTx
+				}
+				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 ErrInvalidLengthTx
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex < 0 {
+				return ErrInvalidLengthTx
+			}
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.Version = string(dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
 		default:
 			iNdEx = preIndex
 			skippy, err := skipTx(dAtA[iNdEx:])
diff --git a/modules/core/keeper/msg_server.go b/modules/core/keeper/msg_server.go
index be18391c698..e8b7c0fd254 100644
--- a/modules/core/keeper/msg_server.go
+++ b/modules/core/keeper/msg_server.go
@@ -194,6 +194,7 @@ func (k Keeper) ChannelOpenInit(goCtx context.Context, msg *channeltypes.MsgChan
 
 	return &channeltypes.MsgChannelOpenInitResponse{
 		ChannelId: channelID,
+		Version:   msg.Channel.Version,
 	}, nil
 }
 
@@ -232,7 +233,9 @@ func (k Keeper) ChannelOpenTry(goCtx context.Context, msg *channeltypes.MsgChann
 	// Write channel into state
 	k.ChannelKeeper.WriteOpenTryChannel(ctx, msg.PortId, channelID, msg.Channel.Ordering, msg.Channel.ConnectionHops, msg.Channel.Counterparty, version)
 
-	return &channeltypes.MsgChannelOpenTryResponse{}, nil
+	return &channeltypes.MsgChannelOpenTryResponse{
+		Version: version,
+	}, nil
 }
 
 // ChannelOpenAck defines a rpc handler method for MsgChannelOpenAck.
diff --git a/proto/ibc/core/channel/v1/tx.proto b/proto/ibc/core/channel/v1/tx.proto
index 15714173a1a..d34b00e9124 100644
--- a/proto/ibc/core/channel/v1/tx.proto
+++ b/proto/ibc/core/channel/v1/tx.proto
@@ -68,6 +68,7 @@ message MsgChannelOpenInit {
 // MsgChannelOpenInitResponse defines the Msg/ChannelOpenInit response type.
 message MsgChannelOpenInitResponse {
   string channel_id = 1 [(gogoproto.moretags) = "yaml:\"channel_id\""];
+  string version    = 2;
 }
 
 // MsgChannelOpenInit defines a msg sent by a Relayer to try to open a channel
@@ -91,7 +92,9 @@ message MsgChannelOpenTry {
 }
 
 // MsgChannelOpenTryResponse defines the Msg/ChannelOpenTry response type.
-message MsgChannelOpenTryResponse {}
+message MsgChannelOpenTryResponse {
+  string version = 1;
+}
 
 // MsgChannelOpenAck defines a msg sent by a Relayer to Chain A to acknowledge
 // the change of channel state to TRYOPEN on Chain B.