Add more events to on IBC transfer, add tests for ibc transfer event

CHANGELOG.md

@@ -76,6 +76,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ### Improvements
 
+* (apps/transfer) [\#2643](https://github.com/cosmos/ibc-go/pull/2643) Add amount, denom, and memo to transfer event emission.
 * (core) [\#2746](https://github.com/cosmos/ibc-go/pull/2746) Allow proof height to be zero for all core IBC `sdk.Msg` types that contain proofs.
 * (light-clients/06-solomachine) [\#2746](https://github.com/cosmos/ibc-go/pull/2746) Discard proofHeight for solo machines and use the solo machine sequence instead.
 * (modules/light-clients/07-tendermint) [\#1713](https://github.com/cosmos/ibc-go/pull/1713) Allow client upgrade proposals to update `TrustingPeriod`. See ADR-026 for context.

modules/apps/transfer/keeper/msg_server.go

@@ -46,6 +46,9 @@ func (k Keeper) Transfer(goCtx context.Context, msg *types.MsgTransfer) (*types.
 			types.EventTypeTransfer,
 			sdk.NewAttribute(sdk.AttributeKeySender, msg.Sender),
 			sdk.NewAttribute(types.AttributeKeyReceiver, msg.Receiver),
+			sdk.NewAttribute(types.AttributeKeyAmount, msg.Token.Amount.String()),
+			sdk.NewAttribute(types.AttributeKeyDenom, msg.Token.Denom),
+			sdk.NewAttribute(types.AttributeKeyMemo, msg.Memo),
 		),
 		sdk.NewEvent(
 			sdk.EventTypeMessage,

modules/apps/transfer/keeper/msg_server_test.go

@@ -7,6 +7,36 @@ import (
 	"github.com/cosmos/ibc-go/v6/modules/apps/transfer/types"
 )
 
+func (suite *KeeperTestSuite) assertTransferEvents(
+	actualEvents sdk.Events,
+	coin sdk.Coin,
+	memo string,
+) {
+	hasEvent := false
+
+	expEvent := map[string]string{
+		sdk.AttributeKeySender:     suite.chainA.SenderAccount.GetAddress().String(),
+		types.AttributeKeyReceiver: suite.chainB.SenderAccount.GetAddress().String(),
+		types.AttributeKeyAmount:   coin.Amount.String(),
+		types.AttributeKeyDenom:    coin.Denom,
+		types.AttributeKeyMemo:     memo,
+	}
+
+	for _, event := range actualEvents {
+		if event.Type == types.EventTypeTransfer {
+			hasEvent = true
+			suite.Require().Len(event.Attributes, len(expEvent))
+			for _, attr := range event.Attributes {
+				expValue, found := expEvent[string(attr.Key)]
+				suite.Require().True(found)
+				suite.Require().Equal(expValue, string(attr.Value))
+			}
+		}
+	}
+
+	suite.Require().True(hasEvent, "event: %s was not found in events", types.EventTypeTransfer)
+}
+
 func (suite *KeeperTestSuite) TestMsgTransfer() {
 	var msg *types.MsgTransfer
 
@@ -94,15 +124,22 @@ func (suite *KeeperTestSuite) TestMsgTransfer() {
 
 			tc.malleate()
 
-			res, err := suite.chainA.GetSimApp().TransferKeeper.Transfer(sdk.WrapSDKContext(suite.chainA.GetContext()), msg)
+			ctx := suite.chainA.GetContext()
+			res, err := suite.chainA.GetSimApp().TransferKeeper.Transfer(sdk.WrapSDKContext(ctx), msg)
 
 			if tc.expPass {
 				suite.Require().NoError(err)
 				suite.Require().NotNil(res)
 				suite.Require().NotEqual(res.Sequence, uint64(0))
+
+				events := ctx.EventManager().Events()
+				suite.assertTransferEvents(events, coin, "memo")
 			} else {
 				suite.Require().Error(err)
 				suite.Require().Nil(res)
+
+				events := ctx.EventManager().Events()
+				suite.Require().Len(events, 0)
 			}
 		})
 	}