refactor(network): call app.Close() on network cleanup (#18249)

(cherry picked from commit 139a29e)

testutil/network/network.go

@@ -273,6 +273,7 @@ type (
 		ValAddress sdk.ValAddress
 		RPCClient  cmtclient.Client
 
+		app      servertypes.Application
 		tmNode   *node.Node
 		api      *api.Server
 		grpc     *grpc.Server
@@ -611,8 +612,7 @@ func New(l Logger, baseDir string, cfg Config) (*Network, error) {
 
 	l.Log("starting test network...")
 	for idx, v := range network.Validators {
-		err := startInProcess(cfg, v)
-		if err != nil {
+		if err := startInProcess(cfg, v); err != nil {
 			return nil, err
 		}
 		l.Log("started validator", idx)
@@ -803,6 +803,12 @@ func (n *Network) Cleanup() {
 		if v.grpcWeb != nil {
 			_ = v.grpcWeb.Close()
 		}
+
+		if v.app != nil {
+			if err := v.app.Close(); err != nil {
+				n.Logger.Log("failed to stop validator ABCI application", "err", err)
+			}
+		}
 	}
 
 	time.Sleep(100 * time.Millisecond)

testutil/network/util.go

@@ -18,6 +18,8 @@ import (
 	cmttime "github.com/cometbft/cometbft/types/time"
 	"golang.org/x/sync/errgroup"
 
+	"cosmossdk.io/log"
+
 	"github.com/cosmos/cosmos-sdk/server"
 	"github.com/cosmos/cosmos-sdk/server/api"
 	servergrpc "github.com/cosmos/cosmos-sdk/server/grpc"
@@ -43,6 +45,8 @@ func startInProcess(cfg Config, val *Validator) error {
 	}
 
 	app := cfg.AppConstructor(*val)
+	val.app = app
+
 	appGenesisProvider := func() (*cmttypes.GenesisDoc, error) {
 		appGenesis, err := genutiltypes.AppGenesisFromFile(cmtCfg.GenesisFile())
 		if err != nil {
@@ -101,14 +105,14 @@ func startInProcess(cfg Config, val *Validator) error {
 		// Start the gRPC server in a goroutine. Note, the provided ctx will ensure
 		// that the server is gracefully shut down.
 		val.errGroup.Go(func() error {
-			return servergrpc.StartGRPCServer(ctx, logger.With("module", "grpc-server"), grpcCfg, grpcSrv)
+			return servergrpc.StartGRPCServer(ctx, logger.With(log.ModuleKey, "grpc-server"), grpcCfg, grpcSrv)
 		})
 
 		val.grpc = grpcSrv
 	}
 
 	if val.APIAddress != "" {
-		apiSrv := api.New(val.ClientCtx, logger.With("module", "api-server"), val.grpc)
+		apiSrv := api.New(val.ClientCtx, logger.With(log.ModuleKey, "api-server"), val.grpc)
 		app.RegisterAPIRoutes(apiSrv, val.AppConfig.API)
 
 		val.errGroup.Go(func() error {