feat: make authz MsgExec emit events from all executed msgs (#9522)

<!--
The default pull request template is for types feat, fix, or refactor.
For other templates, add one of the following parameters to the url:
- template=docs.md
- template=other.md
-->

## Description

Closes: #9501 

<!-- Add a description of the changes that this PR introduces and the files that
are the most critical to review. -->

This PR makes MsgExec emit all events from each executed message. Adds a test to check for the additional events.

---

### Author Checklist

*All items are required. Please add a note to the item if the item is not applicable and
please add links to any relevant follow up issues.*

I have...

- [x] included the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [x] added `!` to the type prefix if API or client breaking change
- [x] targeted the correct branch (see [PR Targeting](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#pr-targeting))
- [x] provided a link to the relevant issue or specification
- [x] followed the guidelines for [building modules](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules)
- [x] included the necessary unit and integration [tests](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#testing)
- [ ] ~~added a changelog entry to `CHANGELOG.md`~~ **N/A**
- [x] included comments for [documenting Go code](https://blog.golang.org/godoc)
- [ ] ~~updated the relevant documentation or specification~~ **N/A**
- [x] reviewed "Files changed" and left comments if necessary
- [ ] confirmed all CI checks have passed

### Reviewers Checklist

*All items are required. Please add a note if the item is not applicable and please add
your handle next to the items reviewed if you only reviewed selected items.*

I have...

- [ ] confirmed the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [ ] confirmed `!` in the type prefix if API or client breaking change
- [ ] confirmed all author checklist items have been addressed 
- [ ] reviewed state machine logic
- [ ] reviewed API design and naming
- [ ] reviewed documentation is accurate
- [ ] reviewed tests and test coverage
- [ ] manually tested (if applicable)

x/authz/keeper/keeper.go

@@ -113,6 +113,14 @@ func (k Keeper) DispatchActions(ctx sdk.Context, grantee sdk.AccAddress, msgs []
 			return nil, sdkerrors.Wrapf(err, "failed to execute message; message %v", msg)
 		}
 		results[i] = msgResp.Data
+
+		// emit the events from the dispatched actions
+		events := msgResp.Events
+		sdkEvents := make([]sdk.Event, 0, len(events))
+		for i := 0; i < len(events); i++ {
+			sdkEvents = append(sdkEvents, sdk.Event(events[i]))
+		}
+		ctx.EventManager().EmitEvents(sdkEvents)
 	}
 
 	return results, nil

x/authz/keeper/keeper_test.go

@@ -196,6 +196,57 @@ func (s *TestSuite) TestKeeperFees() {
 	s.Require().NotNil(authorization)
 }
 
+// Tests that all msg events included in an authz MsgExec tx
+// Ref: https://github.com/cosmos/cosmos-sdk/issues/9501
+func (s *TestSuite) TestDispatchedEvents() {
+	require := s.Require()
+	app, addrs := s.app, s.addrs
+	granterAddr := addrs[0]
+	granteeAddr := addrs[1]
+	recipientAddr := addrs[2]
+	require.NoError(simapp.FundAccount(app.BankKeeper, s.ctx, granterAddr, sdk.NewCoins(sdk.NewInt64Coin("steak", 10000))))
+	now := s.ctx.BlockHeader().Time
+	require.NotNil(now)
+
+	smallCoin := sdk.NewCoins(sdk.NewInt64Coin("steak", 20))
+	msgs := authz.NewMsgExec(granteeAddr, []sdk.Msg{
+		&banktypes.MsgSend{
+			Amount:      sdk.NewCoins(sdk.NewInt64Coin("steak", 2)),
+			FromAddress: granterAddr.String(),
+			ToAddress:   recipientAddr.String(),
+		},
+	})
+
+	// grant authorization
+	err := app.AuthzKeeper.SaveGrant(s.ctx, granteeAddr, granterAddr, &banktypes.SendAuthorization{SpendLimit: smallCoin}, now)
+	require.NoError(err)
+	authorization, _ := app.AuthzKeeper.GetCleanAuthorization(s.ctx, granteeAddr, granterAddr, bankSendAuthMsgType)
+	require.NotNil(authorization)
+	require.Equal(authorization.MsgTypeURL(), bankSendAuthMsgType)
+
+	executeMsgs, err := msgs.GetMessages()
+	require.NoError(err)
+
+	result, err := app.AuthzKeeper.DispatchActions(s.ctx, granteeAddr, executeMsgs)
+	require.NoError(err)
+	require.NotNil(result)
+	events := s.ctx.EventManager().Events()
+	// get last 5 events (events that occur *after* the grant)
+	events = events[len(events)-5:]
+	requiredEvents := map[string]bool{
+		"coin_spent":    false,
+		"coin_received": false,
+		"transfer":      false,
+		"message":       false,
+	}
+	for _, e := range events {
+		requiredEvents[e.Type] = true
+	}
+	for _, v := range requiredEvents {
+		require.True(v)
+	}
+}
+
 func TestTestSuite(t *testing.T) {
 	suite.Run(t, new(TestSuite))
 }