docs: demonstrate how to wire custom ante handlers in 0.50 app_di (#21767)

simapp/app_config.go

@@ -202,8 +202,10 @@ var (
 				Config: appconfig.WrapAny(&paramsmodulev1.Module{}),
 			},
 			{
-				Name:   "tx",
-				Config: appconfig.WrapAny(&txconfigv1.Config{}),
+				Name: "tx",
+				Config: appconfig.WrapAny(&txconfigv1.Config{
+					SkipAnteHandler: true, // Enable this to skip the default antehandlers and set custom ante handlers.
+				}),
 			},
 			{
 				Name:   genutiltypes.ModuleName,

simapp/app_di.go

@@ -29,6 +29,7 @@ import (
 	testdata_pulsar "github.com/cosmos/cosmos-sdk/testutil/testdata/testpb"
 	"github.com/cosmos/cosmos-sdk/types/module"
 	"github.com/cosmos/cosmos-sdk/x/auth"
+	"github.com/cosmos/cosmos-sdk/x/auth/ante"
 	authkeeper "github.com/cosmos/cosmos-sdk/x/auth/keeper"
 	authsims "github.com/cosmos/cosmos-sdk/x/auth/simulation"
 	authtypes "github.com/cosmos/cosmos-sdk/x/auth/types"
@@ -81,7 +82,7 @@ type SimApp struct {
 	GroupKeeper           groupkeeper.Keeper
 	NFTKeeper             nftkeeper.Keeper
 	ConsensusParamsKeeper consensuskeeper.Keeper
-	CircuitBreakerKeeper  circuitkeeper.Keeper
+	CircuitKeeper         circuitkeeper.Keeper
 
 	// simulation manager
 	sm *module.SimulationManager
@@ -182,7 +183,7 @@ func NewSimApp(
 		&app.GroupKeeper,
 		&app.NFTKeeper,
 		&app.ConsensusParamsKeeper,
-		&app.CircuitBreakerKeeper,
+		&app.CircuitKeeper,
 	); err != nil {
 		panic(err)
 	}
@@ -248,6 +249,9 @@ func NewSimApp(
 
 	app.sm.RegisterStoreDecoders()
 
+	// set custom ante handler
+	app.setAnteHandler(app.txConfig)
+
 	// A custom InitChainer can be set if extra pre-init-genesis logic is required.
 	// By default, when using app wiring enabled module, this is not required.
 	// For instance, the upgrade module will set automatically the module version map in its init genesis thanks to app wiring.
@@ -266,6 +270,29 @@ func NewSimApp(
 	return app
 }
 
+// setAnteHandler sets custom ante handlers.
+// "x/auth/tx" pre-defined ante handler have been disabled in app_config.
+func (app *SimApp) setAnteHandler(txConfig client.TxConfig) {
+	anteHandler, err := NewAnteHandler(
+		HandlerOptions{
+			ante.HandlerOptions{
+				AccountKeeper:   app.AccountKeeper,
+				BankKeeper:      app.BankKeeper,
+				SignModeHandler: txConfig.SignModeHandler(),
+				FeegrantKeeper:  app.FeeGrantKeeper,
+				SigGasConsumer:  ante.DefaultSigVerificationGasConsumer,
+			},
+			&app.CircuitKeeper,
+		},
+	)
+	if err != nil {
+		panic(err)
+	}
+
+	// Set the AnteHandler for the app
+	app.SetAnteHandler(anteHandler)
+}
+
 // LegacyAmino returns SimApp's amino codec.
 //
 // NOTE: This is solely to be used for testing purposes as it may be desirable