feat(app): set up post handler for tx tips

CHANGELOG.md

@@ -18,6 +18,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 #### Added
 
 - [#1340](https://github.com/regen-network/regen-ledger/pull/1340) Add Cosmos SDK group module to app configuration
+- [#1454](https://github.com/regen-network/regen-ledger/pull/1454) Add transaction tips to the application post handler.
 
 #### Changed
 

app/app.go

@@ -537,6 +537,7 @@ func NewRegenApp(logger log.Logger, db dbm.DB, traceStore io.Writer, loadLatest
 		panic(err)
 	}
 	app.SetAnteHandler(anteHandler)
+	app.setPostHandler()
 
 	if loadLatest {
 		if err := app.LoadLatestVersion(); err != nil {

app/stable_appconfig.go

@@ -6,6 +6,7 @@ import (
 	sdk "github.com/cosmos/cosmos-sdk/types"
 	"github.com/cosmos/cosmos-sdk/types/module"
 	"github.com/cosmos/cosmos-sdk/x/auth/ante"
+	"github.com/cosmos/cosmos-sdk/x/auth/posthandler"
 	"github.com/cosmos/cosmos-sdk/x/group"
 	upgradetypes "github.com/cosmos/cosmos-sdk/x/upgrade/types"
 
@@ -55,3 +56,13 @@ func (app *RegenApp) setCustomAnteHandler(cfg client.TxConfig) (sdk.AnteHandler,
 		},
 	)
 }
+
+func (app *RegenApp) setPostHandler() {
+	if app.BankKeeper == nil {
+		panic("cannot instantiate app post handler when app.BankKeeper is nil")
+	}
+	postDecorators := []sdk.AnteDecorator{
+		posthandler.NewTipDecorator(app.BankKeeper),
+	}
+	app.SetPostHandler(sdk.ChainAnteDecorators(postDecorators...))
+}