chore: changelog update (backport #12859) (#12861)

CHANGELOG.md

@@ -39,6 +39,7 @@ Ref: https://keepachangelog.com/en/1.0.0/
 
 ### Improvements
 
+* (events) [#12850](https://github.com/cosmos/cosmos-sdk/pull/12850) Add a new `fee_payer` attribute to the `tx` event that is emitted from the `DeductFeeDecorator` AnteHandler decorator.
 * (x/params) [#12615](https://github.com/cosmos/cosmos-sdk/pull/12615) Add `GetParamSetIfExists` function to params `Subspace` to prevent panics on breaking changes.
 * (x/bank) [#12674](https://github.com/cosmos/cosmos-sdk/pull/12674) Add convenience function `CreatePrefixedAccountStoreKey()` to construct key to access account's balance for a given denom.
 

x/auth/ante/fee.go

@@ -110,8 +110,11 @@ func (dfd DeductFeeDecorator) checkDeductFee(ctx sdk.Context, sdkTx sdk.Tx, fee
 	}
 
 	events := sdk.Events{
-		sdk.NewEvent(sdk.EventTypeTx, sdk.NewAttribute(sdk.AttributeKeyFee, fee.String())),
-		sdk.NewEvent(sdk.EventTypeTx, sdk.NewAttribute(sdk.AttributeKeyFeePayer, deductFeesFrom.String())),
+		sdk.NewEvent(
+			sdk.EventTypeTx,
+			sdk.NewAttribute(sdk.AttributeKeyFee, fee.String()),
+			sdk.NewAttribute(sdk.AttributeKeyFeePayer, deductFeesFrom.String()),
+		),
 	}
 	ctx.EventManager().EmitEvents(events)
 

x/auth/tx/service_test.go

@@ -151,7 +151,7 @@ func (s IntegrationTestSuite) TestSimulateTx_GRPC() {
 				// - tx.* events: tx.fee, tx.acc_seq, tx.signature
 				// - Sending Amount to recipient: coin_spent, coin_received, transfer and message.sender=<val1>
 				// - Msg events: message.module=bank and message.action=/cosmos.bank.v1beta1.MsgSend
-				s.Require().Equal(len(res.GetResult().GetEvents()), 14) // 1 coin recv 1 coin spent, 1 transfer, 3 messages.
+				s.Require().Equal(len(res.GetResult().GetEvents()), 13) // 1 coin recv 1 coin spent, 1 transfer, 3 messages.
 				s.Require().True(res.GetGasInfo().GetGasUsed() > 0)     // Gas used sometimes change, just check it's not empty.
 			}
 		})
@@ -193,7 +193,7 @@ func (s IntegrationTestSuite) TestSimulateTx_GRPCGateway() {
 				s.Require().NoError(err)
 				// Check the result and gas used are correct.
 				s.Require().Len(result.GetResult().MsgResponses, 1)
-				s.Require().Equal(len(result.GetResult().GetEvents()), 14) // See TestSimulateTx_GRPC for the 13 events.
+				s.Require().Equal(len(result.GetResult().GetEvents()), 13) // See TestSimulateTx_GRPC for the 13 events.
 				s.Require().True(result.GetGasInfo().GetGasUsed() > 0)     // Gas used sometimes change, jus
 			}
 		})