feat: emitting an event when handling a client upgrade proposal (#1570)

* feat: emitting an event when handling a client upgrade proposal

* refactor: only emit event if err is nil

* refactor: idiotmatic go:

(cherry picked from commit 8422d0c)

# Conflicts:
#	CHANGELOG.md

CHANGELOG.md

@@ -46,6 +46,17 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ### Improvements
 
+<<<<<<< HEAD
+=======
+* (cleanup) [\#1335](https://github.com/cosmos/ibc-go/pull/1335/) `gofumpt -w -l .` to standardize the code layout more strictly than `go fmt ./...`
+* (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) [\#1232](https://github.com/cosmos/ibc-go/pull/1232) Updating params on `NewPacketId` and moving to bottom of file.
+* (app/29-fee) [\#1305](https://github.com/cosmos/ibc-go/pull/1305) Change version string for fee module to `ics29-1`
+* (app/29-fee) [\#1341](https://github.com/cosmos/ibc-go/pull/1341) Check if the fee module is locked and if the fee module is enabled before refunding all fees
+* (testing/simapp) [\#1397](https://github.com/cosmos/ibc-go/pull/1397) Adding mock module to maccperms and adding check to ensure mock module is not a blocked account address. 
+* (core/02-client) [\#1570](https://github.com/cosmos/ibc-go/pull/1570) Emitting an event when handling an upgrade client proposal. 
+
+>>>>>>> 8422d0c (feat: emitting an event when handling a client upgrade proposal (#1570))
 ### Features
 
 ### Bug Fixes

modules/core/02-client/keeper/events.go

@@ -1,6 +1,8 @@
 package keeper
 
 import (
+	"fmt"
+
 	sdk "github.com/cosmos/cosmos-sdk/types"
 
 	"github.com/cosmos/ibc-go/v3/modules/core/02-client/types"
@@ -68,6 +70,17 @@ func EmitUpdateClientProposalEvent(ctx sdk.Context, clientID string, clientState
 	)
 }
 
+// EmitUpgradeClientProposalEvent emits an upgrade client proposal event
+func EmitUpgradeClientProposalEvent(ctx sdk.Context, title string, height int64) {
+	ctx.EventManager().EmitEvent(
+		sdk.NewEvent(
+			types.EventTypeUpgradeClientProposal,
+			sdk.NewAttribute(types.AttributeKeyUpgradePlanTitle, title),
+			sdk.NewAttribute(types.AttributeKeyUpgradePlanHeight, fmt.Sprintf("%d", height)),
+		),
+	)
+}
+
 // EmitSubmitMisbehaviourEvent emits a client misbehaviour event
 func EmitSubmitMisbehaviourEvent(ctx sdk.Context, clientID string, clientState exported.ClientState) {
 	ctx.EventManager().EmitEvent(

modules/core/02-client/keeper/proposal.go

@@ -98,5 +98,12 @@ func (k Keeper) HandleUpgradeProposal(ctx sdk.Context, p *types.UpgradeProposal)
 
 	// sets the new upgraded client in last height committed on this chain is at plan.Height,
 	// since the chain will panic at plan.Height and new chain will resume at plan.Height
-	return k.upgradeKeeper.SetUpgradedClient(ctx, p.Plan.Height, bz)
+	if err = k.upgradeKeeper.SetUpgradedClient(ctx, p.Plan.Height, bz); err != nil {
+		return err
+	}
+
+	// emitting an event for handling client upgrade proposal
+	EmitUpgradeClientProposalEvent(ctx, p.Title, p.Plan.Height)
+
+	return nil
 }

modules/core/02-client/types/events.go

@@ -8,20 +8,23 @@ import (
 
 // IBC client events
 const (
-	AttributeKeyClientID        = "client_id"
-	AttributeKeySubjectClientID = "subject_client_id"
-	AttributeKeyClientType      = "client_type"
-	AttributeKeyConsensusHeight = "consensus_height"
-	AttributeKeyHeader          = "header"
+	AttributeKeyClientID          = "client_id"
+	AttributeKeySubjectClientID   = "subject_client_id"
+	AttributeKeyClientType        = "client_type"
+	AttributeKeyConsensusHeight   = "consensus_height"
+	AttributeKeyHeader            = "header"
+	AttributeKeyUpgradePlanTitle  = "title"
+	AttributeKeyUpgradePlanHeight = "height"
 )
 
 // IBC client events vars
 var (
-	EventTypeCreateClient         = "create_client"
-	EventTypeUpdateClient         = "update_client"
-	EventTypeUpgradeClient        = "upgrade_client"
-	EventTypeSubmitMisbehaviour   = "client_misbehaviour"
-	EventTypeUpdateClientProposal = "update_client_proposal"
+	EventTypeCreateClient          = "create_client"
+	EventTypeUpdateClient          = "update_client"
+	EventTypeUpgradeClient         = "upgrade_client"
+	EventTypeSubmitMisbehaviour    = "client_misbehaviour"
+	EventTypeUpdateClientProposal  = "update_client_proposal"
+	EventTypeUpgradeClientProposal = "upgrade_client_proposal"
 
 	AttributeValueCategory = fmt.Sprintf("%s_%s", host.ModuleName, SubModuleName)
 )