chore : add selected channel version to MsgChanOpenInitResponse and M…

…sgChanOpenTryResponse (#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
(cherry picked from commit a187803)

# Conflicts:
#	CHANGELOG.md
#	docs/ibc/proto-docs.md
#	modules/core/04-channel/keeper/events.go
#	modules/core/04-channel/types/tx.pb.go
#	modules/core/keeper/msg_server.go
#	proto/ibc/core/channel/v1/tx.proto

CHANGELOG.md

@@ -44,6 +44,14 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ### Improvements
 
+<<<<<<< HEAD
+=======
+* (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) [\#1279](https://github.com/cosmos/ibc-go/pull/1279) Add selected channel version to MsgChanOpenInitResponse and MsgChanOpenTryResponse. Emit channel version during OpenInit/OpenTry
+
+>>>>>>> a187803 (chore : add selected channel version to MsgChanOpenInitResponse and MsgChanOpenTryResponse (#1279))
 ### Features
 
 ### Bug Fixes

docs/ibc/proto-docs.md

@@ -1619,6 +1619,15 @@ is called by a relayer on Chain A.
 MsgChannelOpenInitResponse defines the Msg/ChannelOpenInit response type.
 
 
+<<<<<<< HEAD
+=======
+| Field | Type | Label | Description |
+| ----- | ---- | ----- | ----------- |
+| `channel_id` | [string](#string) |  |  |
+| `version` | [string](#string) |  |  |
+
+
+>>>>>>> a187803 (chore : add selected channel version to MsgChanOpenInitResponse and MsgChanOpenTryResponse (#1279))
 
 
 
@@ -1651,6 +1660,11 @@ on Chain B.
 MsgChannelOpenTryResponse defines the Msg/ChannelOpenTry response type.
 
 
+| Field | Type | Label | Description |
+| ----- | ---- | ----- | ----------- |
+| `version` | [string](#string) |  |  |
+
+
 
 
 

modules/core/04-channel/keeper/events.go

@@ -10,6 +10,124 @@ import (
 	"github.com/cosmos/ibc-go/modules/core/exported"
 )
 
+<<<<<<< HEAD
+=======
+// EmitChannelOpenInitEvent emits a channel open init event
+func EmitChannelOpenInitEvent(ctx sdk.Context, portID string, channelID string, channel types.Channel) {
+	ctx.EventManager().EmitEvents(sdk.Events{
+		sdk.NewEvent(
+			types.EventTypeChannelOpenInit,
+			sdk.NewAttribute(types.AttributeKeyPortID, portID),
+			sdk.NewAttribute(types.AttributeKeyChannelID, channelID),
+			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{
+		sdk.NewEvent(
+			sdk.EventTypeMessage,
+			sdk.NewAttribute(sdk.AttributeKeyModule, types.AttributeValueCategory),
+		),
+	})
+}
+
+// EmitChannelOpenTryEvent emits a channel open try event
+func EmitChannelOpenTryEvent(ctx sdk.Context, portID string, channelID string, channel types.Channel) {
+	ctx.EventManager().EmitEvents(sdk.Events{
+		sdk.NewEvent(
+			types.EventTypeChannelOpenTry,
+			sdk.NewAttribute(types.AttributeKeyPortID, portID),
+			sdk.NewAttribute(types.AttributeKeyChannelID, channelID),
+			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{
+		sdk.NewEvent(
+			sdk.EventTypeMessage,
+			sdk.NewAttribute(sdk.AttributeKeyModule, types.AttributeValueCategory),
+		),
+	})
+}
+
+// EmitChannelOpenAckEvent emits a channel open acknowledge event
+func EmitChannelOpenAckEvent(ctx sdk.Context, portID string, channelID string, channel types.Channel) {
+	ctx.EventManager().EmitEvents(sdk.Events{
+		sdk.NewEvent(
+			types.EventTypeChannelOpenAck,
+			sdk.NewAttribute(types.AttributeKeyPortID, portID),
+			sdk.NewAttribute(types.AttributeKeyChannelID, channelID),
+			sdk.NewAttribute(types.AttributeCounterpartyPortID, channel.Counterparty.PortId),
+			sdk.NewAttribute(types.AttributeCounterpartyChannelID, channel.Counterparty.ChannelId),
+			sdk.NewAttribute(types.AttributeKeyConnectionID, channel.ConnectionHops[0]),
+		),
+		sdk.NewEvent(
+			sdk.EventTypeMessage,
+			sdk.NewAttribute(sdk.AttributeKeyModule, types.AttributeValueCategory),
+		),
+	})
+}
+
+// EmitChannelOpenConfirmEvent emits a channel open confirm event
+func EmitChannelOpenConfirmEvent(ctx sdk.Context, portID string, channelID string, channel types.Channel) {
+	ctx.EventManager().EmitEvents(sdk.Events{
+		sdk.NewEvent(
+			types.EventTypeChannelOpenConfirm,
+			sdk.NewAttribute(types.AttributeKeyPortID, portID),
+			sdk.NewAttribute(types.AttributeKeyChannelID, channelID),
+			sdk.NewAttribute(types.AttributeCounterpartyPortID, channel.Counterparty.PortId),
+			sdk.NewAttribute(types.AttributeCounterpartyChannelID, channel.Counterparty.ChannelId),
+			sdk.NewAttribute(types.AttributeKeyConnectionID, channel.ConnectionHops[0]),
+		),
+		sdk.NewEvent(
+			sdk.EventTypeMessage,
+			sdk.NewAttribute(sdk.AttributeKeyModule, types.AttributeValueCategory),
+		),
+	})
+}
+
+// EmitChannelCloseInitEvent emits a channel close init event
+func EmitChannelCloseInitEvent(ctx sdk.Context, portID string, channelID string, channel types.Channel) {
+	ctx.EventManager().EmitEvents(sdk.Events{
+		sdk.NewEvent(
+			types.EventTypeChannelCloseInit,
+			sdk.NewAttribute(types.AttributeKeyPortID, portID),
+			sdk.NewAttribute(types.AttributeKeyChannelID, channelID),
+			sdk.NewAttribute(types.AttributeCounterpartyPortID, channel.Counterparty.PortId),
+			sdk.NewAttribute(types.AttributeCounterpartyChannelID, channel.Counterparty.ChannelId),
+			sdk.NewAttribute(types.AttributeKeyConnectionID, channel.ConnectionHops[0]),
+		),
+		sdk.NewEvent(
+			sdk.EventTypeMessage,
+			sdk.NewAttribute(sdk.AttributeKeyModule, types.AttributeValueCategory),
+		),
+	})
+}
+
+// EmitChannelCloseConfirmEvent emits a channel close confirm event
+func EmitChannelCloseConfirmEvent(ctx sdk.Context, portID string, channelID string, channel types.Channel) {
+	ctx.EventManager().EmitEvents(sdk.Events{
+		sdk.NewEvent(
+			types.EventTypeChannelCloseConfirm,
+			sdk.NewAttribute(types.AttributeKeyPortID, portID),
+			sdk.NewAttribute(types.AttributeKeyChannelID, channelID),
+			sdk.NewAttribute(types.AttributeCounterpartyPortID, channel.Counterparty.PortId),
+			sdk.NewAttribute(types.AttributeCounterpartyChannelID, channel.Counterparty.ChannelId),
+			sdk.NewAttribute(types.AttributeKeyConnectionID, channel.ConnectionHops[0]),
+		),
+		sdk.NewEvent(
+			sdk.EventTypeMessage,
+			sdk.NewAttribute(sdk.AttributeKeyModule, types.AttributeValueCategory),
+		),
+	})
+}
+
+>>>>>>> a187803 (chore : add selected channel version to MsgChanOpenInitResponse and MsgChanOpenTryResponse (#1279))
 // EmitSendPacketEvent emits an event with packet data along with other packet information for relayer
 // to pick up and relay to other chain
 func EmitSendPacketEvent(ctx sdk.Context, packet exported.PacketI, channel types.Channel, timeoutHeight exported.Height) {

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"