chore: upstream more changes from v2 (#20387)

Co-authored-by: Matt Kocubinski <mkocubinski@gmail.com>
2024-05-17 12:58:52 +02:00 · 2024-05-17 12:58:52 +02:00 · d7cc6de7cc
commit d7cc6de7cc
parent 92dafe6dac
39 changed files with 5432 additions and 8 deletions
--- a/proto/cosmos/streaming/v1/grpc.proto
+++ b/proto/cosmos/streaming/v1/grpc.proto
@ -0,0 +1,71 @@
+syntax = "proto3";
+
+package cosmos.streaming.v1;
+
+option go_package = "cosmossdk.io/server/v2/streaming";
+
+// ListenDeliverBlockRequest is the request type for the ListenDeliverBlock RPC method
+message ListenDeliverBlockRequest {
+  int64                 block_height = 1;
+  repeated bytes        txs          = 2;
+  repeated Event        events       = 3;
+  repeated ExecTxResult tx_results   = 4;
+}
+
+// ListenDeliverBlockResponse is the response type for the ListenDeliverBlock RPC method
+message ListenDeliverBlockResponse {}
+
+// ListenStateChangesRequest is the request type for the ListenStateChanges RPC method
+message ListenStateChangesRequest {
+  int64                block_height = 1;
+  repeated StoreKVPair change_set   = 2;
+  bytes                app_hash     = 3;
+}
+
+// ListenStateChangesResponse is the response type for the ListenStateChanges RPC method
+message ListenStateChangesResponse {}
+
+// ListenerService is the service for the Listener interface
+service ListenerService {
+  // ListenDeliverBlock is the corresponding endpoint for Listener.ListenDeliverBlock
+  rpc ListenDeliverBlock(ListenDeliverBlockRequest) returns (ListenDeliverBlockResponse);
+  // ListenStateChanges is the corresponding endpoint for Listener.ListenStateChanges
+  rpc ListenStateChanges(ListenStateChangesRequest) returns (ListenStateChangesResponse);
+}
+
+// StoreKVPair is a single key-value pair, associated with a store.
+message StoreKVPair {
+  // address defines the address of the account the state changes are coming from.
+  // In case of modules you can expect a stringified
+  bytes address = 1;
+  // key defines the key of the address that changed.
+  bytes key = 2;
+  // value defines the value that changed, empty in case of removal.
+  bytes value = 3;
+  // delete defines if the key was removed.
+  bool delete = 4; // true indicates a delete operation, false indicates a set operation
+}
+
+// Event is a single event, associated with a transaction.
+message Event {
+  string                  type       = 1;
+  repeated EventAttribute attributes = 2;
+}
+
+// EventAttribute is a single key-value pair, associated with an event.
+message EventAttribute {
+  string key   = 1;
+  string value = 2;
+}
+
+// ExecTxResult contains results of executing one individual transaction.
+message ExecTxResult {
+  uint32         code       = 1;
+  bytes          data       = 2;
+  string         log        = 3;
+  string         info       = 4;
+  int64          gas_wanted = 5;
+  int64          gas_used   = 6;
+  repeated Event events     = 7;
+  string         codespace  = 8;
+}
--- a/server/v2/api/grpc/config.go
+++ b/server/v2/api/grpc/config.go
@ -0,0 +1,34 @@
+package grpc
+
+import "math"
+
+func DefaultConfig() *Config {
+	return &Config{
+		Enable: true,
+		// DefaultGRPCAddress defines the default address to bind the gRPC server to.
+		Address: "localhost:9090",
+		// DefaultGRPCMaxRecvMsgSize defines the default gRPC max message size in
+		// bytes the server can receive.
+		MaxRecvMsgSize: 1024 * 1024 * 10,
+		// DefaultGRPCMaxSendMsgSize defines the default gRPC max message size in
+		// bytes the server can send.
+		MaxSendMsgSize: math.MaxInt32,
+	}
+}
+
+// GRPCConfig defines configuration for the gRPC server.
+type Config struct {
+	// Enable defines if the gRPC server should be enabled.
+	Enable bool `mapstructure:"enable" toml:"enable" comment:"Enable defines if the gRPC server should be enabled."`
+
+	// Address defines the API server to listen on
+	Address string `mapstructure:"address" toml:"address" comment:"Address defines the gRPC server address to bind to."`
+
+	// MaxRecvMsgSize defines the max message size in bytes the server can receive.
+	// The default value is 10MB.
+	MaxRecvMsgSize int `mapstructure:"max-recv-msg-size" toml:"max-recv-msg-size" comment:"MaxRecvMsgSize defines the max message size in bytes the server can receive.\nThe default value is 10MB."`
+
+	// MaxSendMsgSize defines the max message size in bytes the server can send.
+	// The default value is math.MaxInt32.
+	MaxSendMsgSize int `mapstructure:"max-send-msg-size" toml:"max-send-msg-size" comment:"MaxSendMsgSize defines the max message size in bytes the server can send.\nThe default value is math.MaxInt32."`
+}
--- a/server/v2/api/grpc/gogoreflection/doc.go
+++ b/server/v2/api/grpc/gogoreflection/doc.go
@ -0,0 +1,5 @@
+// Package gogoreflection implements gRPC reflection for gogoproto consumers
+// the normal reflection library does not work as it points to a different
+// singleton registry. The API and codebase is taken from the official gRPC
+// reflection repository.
+package gogoreflection
--- a/server/v2/api/grpc/gogoreflection/fix_registration.go
+++ b/server/v2/api/grpc/gogoreflection/fix_registration.go
@ -0,0 +1,76 @@
+package gogoreflection
+
+import (
+	"reflect"
+
+	_ "github.com/cosmos/gogoproto/gogoproto" // required so it does register the gogoproto file descriptor
+	gogoproto "github.com/cosmos/gogoproto/proto"
+
+	_ "github.com/cosmos/cosmos-proto" // look above
+	"github.com/golang/protobuf/proto" //nolint:staticcheck // migrate in a future pr
+)
+
+func getFileDescriptor(filePath string) []byte {
+	// Since we got well known descriptors which are not registered into gogoproto
+	// registry but are instead registered into the proto one, we need to check both.
+	fd := gogoproto.FileDescriptor(filePath)
+	if len(fd) != 0 {
+		return fd
+	}
+
+	return proto.FileDescriptor(filePath) //nolint:staticcheck // keep for backward compatibility
+}
+
+func getMessageType(name string) reflect.Type {
+	typ := gogoproto.MessageType(name)
+	if typ != nil {
+		return typ
+	}
+
+	return proto.MessageType(name) //nolint:staticcheck // keep for backward compatibility
+}
+
+func getExtension(extID int32, m proto.Message) *gogoproto.ExtensionDesc {
+	// check first in gogoproto registry
+	for id, desc := range gogoproto.RegisteredExtensions(m) {
+		if id == extID {
+			return desc
+		}
+	}
+
+	// check into proto registry
+	for id, desc := range proto.RegisteredExtensions(m) { //nolint:staticcheck // keep for backward compatibility
+		if id == extID {
+			return &gogoproto.ExtensionDesc{
+				ExtendedType:  desc.ExtendedType,  //nolint:staticcheck // keep for backward compatibility
+				ExtensionType: desc.ExtensionType, //nolint:staticcheck // keep for backward compatibility
+				Field:         desc.Field,         //nolint:staticcheck // keep for backward compatibility
+				Name:          desc.Name,          //nolint:staticcheck // keep for backward compatibility
+				Tag:           desc.Tag,           //nolint:staticcheck // keep for backward compatibility
+				Filename:      desc.Filename,      //nolint:staticcheck // keep for backward compatibility
+			}
+		}
+	}
+
+	return nil
+}
+
+func getExtensionsNumbers(m proto.Message) []int32 {
+	gogoProtoExts := gogoproto.RegisteredExtensions(m)
+
+	out := make([]int32, 0, len(gogoProtoExts))
+	for id := range gogoProtoExts {
+		out = append(out, id)
+	}
+	if len(out) != 0 {
+		return out
+	}
+
+	protoExts := proto.RegisteredExtensions(m) //nolint:staticcheck // kept for backwards compatibility
+	out = make([]int32, 0, len(protoExts))
+	for id := range protoExts {
+		out = append(out, id)
+	}
+
+	return out
+}
--- a/server/v2/api/grpc/gogoreflection/fix_registration_test.go
+++ b/server/v2/api/grpc/gogoreflection/fix_registration_test.go
@ -0,0 +1,22 @@
+package gogoreflection
+
+import (
+	"testing"
+
+	"google.golang.org/protobuf/runtime/protoimpl"
+)
+
+func TestRegistrationFix(t *testing.T) {
+	res := getFileDescriptor("gogoproto/gogo.proto")
+	rawDesc, err := decompress(res)
+	if err != nil {
+		t.Fatal(err)
+	}
+	fd := protoimpl.DescBuilder{
+		RawDescriptor: rawDesc,
+	}.Build()
+
+	if fd.File.Extensions().Len() == 0 {
+		t.Fatal("unexpected parsing")
+	}
+}
--- a/server/v2/api/grpc/gogoreflection/serverreflection.go
+++ b/server/v2/api/grpc/gogoreflection/serverreflection.go
@ -0,0 +1,478 @@
+/*
+ *
+ * Copyright 2016 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+/*
+Package reflection implements server reflection service.
+
+The service implemented is defined in:
+https://github.com/grpc/grpc/blob/master/src/proto/grpc/reflection/v1alpha/reflection.proto.
+
+To register server reflection on a gRPC server:
+
+	import "google.golang.org/grpc/reflection"
+
+	s := grpc.NewServer()
+	pb.RegisterYourOwnServer(s, &server{})
+
+	// Register reflection service on gRPC server.
+	reflection.Register(s)
+
+	s.Serve(lis)
+*/
+package gogoreflection // import "google.golang.org/grpc/reflection"
+
+import (
+	"bytes"
+	"compress/gzip"
+	"errors"
+	"fmt"
+	"io"
+	"log"
+	"reflect"
+	"sort"
+	"sync"
+
+	//nolint: staticcheck // keep this import for backward compatibility
+	"github.com/golang/protobuf/proto"
+	dpb "github.com/golang/protobuf/protoc-gen-go/descriptor"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/codes"
+	rpb "google.golang.org/grpc/reflection/grpc_reflection_v1alpha"
+	"google.golang.org/grpc/status"
+)
+
+type serverReflectionServer struct {
+	rpb.UnimplementedServerReflectionServer
+	s *grpc.Server
+
+	initSymbols  sync.Once
+	serviceNames []string
+	symbols      map[string]*dpb.FileDescriptorProto // map of fully-qualified names to files
+}
+
+// Register registers the server reflection service on the given gRPC server.
+func Register(s *grpc.Server) {
+	rpb.RegisterServerReflectionServer(s, &serverReflectionServer{
+		s: s,
+	})
+}
+
+// protoMessage is used for type assertion on proto messages.
+// Generated proto message implements function Descriptor(), but Descriptor()
+// is not part of interface proto.Message. This interface is needed to
+// call Descriptor().
+type protoMessage interface {
+	Descriptor() ([]byte, []int)
+}
+
+func (s *serverReflectionServer) getSymbols() (svcNames []string, symbolIndex map[string]*dpb.FileDescriptorProto) {
+	s.initSymbols.Do(func() {
+		serviceInfo := s.s.GetServiceInfo()
+
+		s.symbols = map[string]*dpb.FileDescriptorProto{}
+		s.serviceNames = make([]string, 0, len(serviceInfo))
+		processed := map[string]struct{}{}
+		for svc, info := range serviceInfo {
+			s.serviceNames = append(s.serviceNames, svc)
+			fdenc, ok := parseMetadata(info.Metadata)
+			if !ok {
+				continue
+			}
+			fd, err := decodeFileDesc(fdenc)
+			if err != nil {
+				continue
+			}
+			s.processFile(fd, processed)
+		}
+		sort.Strings(s.serviceNames)
+	})
+
+	return s.serviceNames, s.symbols
+}
+
+func (s *serverReflectionServer) processFile(fd *dpb.FileDescriptorProto, processed map[string]struct{}) {
+	filename := fd.GetName()
+	if _, ok := processed[filename]; ok {
+		return
+	}
+	processed[filename] = struct{}{}
+
+	prefix := fd.GetPackage()
+
+	for _, msg := range fd.MessageType {
+		s.processMessage(fd, prefix, msg)
+	}
+	for _, en := range fd.EnumType {
+		s.processEnum(fd, prefix, en)
+	}
+	for _, ext := range fd.Extension {
+		s.processField(fd, prefix, ext)
+	}
+	for _, svc := range fd.Service {
+		svcName := fqn(prefix, svc.GetName())
+		s.symbols[svcName] = fd
+		for _, meth := range svc.Method {
+			name := fqn(svcName, meth.GetName())
+			s.symbols[name] = fd
+		}
+	}
+
+	for _, dep := range fd.Dependency {
+		fdenc := getFileDescriptor(dep)
+		fdDep, err := decodeFileDesc(fdenc)
+		if err != nil {
+			continue
+		}
+		s.processFile(fdDep, processed)
+	}
+}
+
+func (s *serverReflectionServer) processMessage(fd *dpb.FileDescriptorProto, prefix string, msg *dpb.DescriptorProto) {
+	msgName := fqn(prefix, msg.GetName())
+	s.symbols[msgName] = fd
+
+	for _, nested := range msg.NestedType {
+		s.processMessage(fd, msgName, nested)
+	}
+	for _, en := range msg.EnumType {
+		s.processEnum(fd, msgName, en)
+	}
+	for _, ext := range msg.Extension {
+		s.processField(fd, msgName, ext)
+	}
+	for _, fld := range msg.Field {
+		s.processField(fd, msgName, fld)
+	}
+	for _, oneof := range msg.OneofDecl {
+		oneofName := fqn(msgName, oneof.GetName())
+		s.symbols[oneofName] = fd
+	}
+}
+
+func (s *serverReflectionServer) processEnum(fd *dpb.FileDescriptorProto, prefix string, en *dpb.EnumDescriptorProto) {
+	enName := fqn(prefix, en.GetName())
+	s.symbols[enName] = fd
+
+	for _, val := range en.Value {
+		valName := fqn(enName, val.GetName())
+		s.symbols[valName] = fd
+	}
+}
+
+func (s *serverReflectionServer) processField(fd *dpb.FileDescriptorProto, prefix string, fld *dpb.FieldDescriptorProto) {
+	fldName := fqn(prefix, fld.GetName())
+	s.symbols[fldName] = fd
+}
+
+func fqn(prefix, name string) string {
+	if prefix == "" {
+		return name
+	}
+	return prefix + "." + name
+}
+
+// fileDescForType gets the file descriptor for the given type.
+// The given type should be a proto message.
+func (s *serverReflectionServer) fileDescForType(st reflect.Type) (*dpb.FileDescriptorProto, error) {
+	m, ok := reflect.Zero(reflect.PtrTo(st)).Interface().(protoMessage)
+	if !ok {
+		return nil, fmt.Errorf("failed to create message from type: %v", st)
+	}
+	enc, _ := m.Descriptor()
+
+	return decodeFileDesc(enc)
+}
+
+// decodeFileDesc does decompression and unmarshalling on the given
+// file descriptor byte slice.
+func decodeFileDesc(enc []byte) (*dpb.FileDescriptorProto, error) {
+	raw, err := decompress(enc)
+	if err != nil {
+		return nil, fmt.Errorf("failed to decompress enc: %w", err)
+	}
+
+	fd := new(dpb.FileDescriptorProto)
+	if err := proto.Unmarshal(raw, fd); err != nil {
+		return nil, fmt.Errorf("bad descriptor: %w", err)
+	}
+	return fd, nil
+}
+
+// decompress does gzip decompression.
+func decompress(b []byte) ([]byte, error) {
+	r, err := gzip.NewReader(bytes.NewReader(b))
+	if err != nil {
+		return nil, fmt.Errorf("bad gzipped descriptor: %w", err)
+	}
+	out, err := io.ReadAll(r)
+	if err != nil {
+		return nil, fmt.Errorf("bad gzipped descriptor: %w", err)
+	}
+	return out, nil
+}
+
+func typeForName(name string) (reflect.Type, error) {
+	pt := getMessageType(name)
+	if pt == nil {
+		return nil, fmt.Errorf("unknown type: %q", name)
+	}
+	st := pt.Elem()
+
+	return st, nil
+}
+
+func fileDescContainingExtension(st reflect.Type, ext int32) (*dpb.FileDescriptorProto, error) {
+	m, ok := reflect.Zero(reflect.PtrTo(st)).Interface().(proto.Message)
+	if !ok {
+		return nil, fmt.Errorf("failed to create message from type: %v", st)
+	}
+
+	extDesc := getExtension(ext, m)
+
+	if extDesc == nil {
+		return nil, fmt.Errorf("failed to find registered extension for extension number %v", ext)
+	}
+
+	return decodeFileDesc(getFileDescriptor(extDesc.Filename))
+}
+
+func (s *serverReflectionServer) allExtensionNumbersForType(st reflect.Type) ([]int32, error) {
+	m, ok := reflect.Zero(reflect.PtrTo(st)).Interface().(proto.Message)
+	if !ok {
+		return nil, fmt.Errorf("failed to create message from type: %v", st)
+	}
+
+	out := getExtensionsNumbers(m)
+	return out, nil
+}
+
+// fileDescWithDependencies returns a slice of serialized fileDescriptors in
+// wire format ([]byte). The fileDescriptors will include fd and all the
+// transitive dependencies of fd with names not in sentFileDescriptors.
+func fileDescWithDependencies(fd *dpb.FileDescriptorProto, sentFileDescriptors map[string]bool) ([][]byte, error) {
+	r := [][]byte{}
+	queue := []*dpb.FileDescriptorProto{fd}
+	for len(queue) > 0 {
+		currentfd := queue[0]
+		queue = queue[1:]
+		if sent := sentFileDescriptors[currentfd.GetName()]; len(r) == 0 || !sent {
+			sentFileDescriptors[currentfd.GetName()] = true
+			currentfdEncoded, err := proto.Marshal(currentfd)
+			if err != nil {
+				return nil, err
+			}
+			r = append(r, currentfdEncoded)
+		}
+		for _, dep := range currentfd.Dependency {
+			fdenc := getFileDescriptor(dep)
+			fdDep, err := decodeFileDesc(fdenc)
+			if err != nil {
+				continue
+			}
+			queue = append(queue, fdDep)
+		}
+	}
+	return r, nil
+}
+
+// fileDescEncodingByFilename finds the file descriptor for given filename,
+// finds all of its previously unsent transitive dependencies, does marshaling
+// on them, and returns the marshaled result.
+func (s *serverReflectionServer) fileDescEncodingByFilename(name string, sentFileDescriptors map[string]bool) ([][]byte, error) {
+	enc := getFileDescriptor(name)
+	if enc == nil {
+		return nil, fmt.Errorf("unknown file: %v", name)
+	}
+	fd, err := decodeFileDesc(enc)
+	if err != nil {
+		return nil, err
+	}
+	return fileDescWithDependencies(fd, sentFileDescriptors)
+}
+
+// parseMetadata finds the file descriptor bytes specified meta.
+// For SupportPackageIsVersion4, m is the name of the proto file, we
+// call proto.FileDescriptor to get the byte slice.
+// For SupportPackageIsVersion3, m is a byte slice itself.
+func parseMetadata(meta interface{}) ([]byte, bool) {
+	// Check if meta is the file name.
+	if fileNameForMeta, ok := meta.(string); ok {
+		return getFileDescriptor(fileNameForMeta), true
+	}
+
+	// Check if meta is the byte slice.
+	if enc, ok := meta.([]byte); ok {
+		return enc, true
+	}
+
+	return nil, false
+}
+
+// fileDescEncodingContainingSymbol finds the file descriptor containing the
+// given symbol, finds all of its previously unsent transitive dependencies,
+// does marshaling on them, and returns the marshaled result. The given symbol
+// can be a type, a service or a method.
+func (s *serverReflectionServer) fileDescEncodingContainingSymbol(name string, sentFileDescriptors map[string]bool) ([][]byte, error) {
+	_, symbols := s.getSymbols()
+	fd := symbols[name]
+	if fd == nil {
+		// Check if it's a type name that was not present in the
+		// transitive dependencies of the registered services.
+		if st, err := typeForName(name); err == nil {
+			fd, err = s.fileDescForType(st)
+			if err != nil {
+				return nil, err
+			}
+		}
+	}
+
+	if fd == nil {
+		return nil, fmt.Errorf("unknown symbol: %v", name)
+	}
+
+	return fileDescWithDependencies(fd, sentFileDescriptors)
+}
+
+// fileDescEncodingContainingExtension finds the file descriptor containing
+// given extension, finds all of its previously unsent transitive dependencies,
+// does marshaling on them, and returns the marshaled result.
+func (s *serverReflectionServer) fileDescEncodingContainingExtension(typeName string, extNum int32, sentFileDescriptors map[string]bool) ([][]byte, error) {
+	st, err := typeForName(typeName)
+	if err != nil {
+		return nil, err
+	}
+	fd, err := fileDescContainingExtension(st, extNum)
+	if err != nil {
+		return nil, err
+	}
+	return fileDescWithDependencies(fd, sentFileDescriptors)
+}
+
+// allExtensionNumbersForTypeName returns all extension numbers for the given type.
+func (s *serverReflectionServer) allExtensionNumbersForTypeName(name string) ([]int32, error) {
+	st, err := typeForName(name)
+	if err != nil {
+		return nil, err
+	}
+	extNums, err := s.allExtensionNumbersForType(st)
+	if err != nil {
+		return nil, err
+	}
+	return extNums, nil
+}
+
+// ServerReflectionInfo is the reflection service handler.
+func (s *serverReflectionServer) ServerReflectionInfo(stream rpb.ServerReflection_ServerReflectionInfoServer) error {
+	sentFileDescriptors := make(map[string]bool)
+	for {
+		in, err := stream.Recv()
+		if errors.Is(err, io.EOF) {
+			return nil
+		}
+		if err != nil {
+			return err
+		}
+
+		out := &rpb.ServerReflectionResponse{ //nolint:staticcheck // SA1019: we want to keep using v1alpha
+			ValidHost:       in.Host, //nolint:staticcheck // SA1019: we want to keep using v1alpha
+			OriginalRequest: in,
+		}
+		switch req := in.MessageRequest.(type) {
+		case *rpb.ServerReflectionRequest_FileByFilename:
+			b, err := s.fileDescEncodingByFilename(req.FileByFilename, sentFileDescriptors) //nolint:staticcheck // SA1019: we want to keep using v1alpha
+			if err != nil {
+				out.MessageResponse = &rpb.ServerReflectionResponse_ErrorResponse{
+					ErrorResponse: &rpb.ErrorResponse{ //nolint:staticcheck // SA1019: we want to keep using v1alpha
+						ErrorCode:    int32(codes.NotFound),
+						ErrorMessage: err.Error(),
+					},
+				}
+			} else {
+				out.MessageResponse = &rpb.ServerReflectionResponse_FileDescriptorResponse{
+					FileDescriptorResponse: &rpb.FileDescriptorResponse{FileDescriptorProto: b}, //nolint:staticcheck // SA1019: we want to keep using v1alpha
+				}
+			}
+		case *rpb.ServerReflectionRequest_FileContainingSymbol:
+			b, err := s.fileDescEncodingContainingSymbol(req.FileContainingSymbol, sentFileDescriptors) //nolint:staticcheck // SA1019: we want to keep using v1alpha
+			if err != nil {
+				out.MessageResponse = &rpb.ServerReflectionResponse_ErrorResponse{
+					ErrorResponse: &rpb.ErrorResponse{ //nolint:staticcheck // SA1019: we want to keep using v1alpha
+						ErrorCode:    int32(codes.NotFound),
+						ErrorMessage: err.Error(),
+					},
+				}
+			} else {
+				out.MessageResponse = &rpb.ServerReflectionResponse_FileDescriptorResponse{
+					FileDescriptorResponse: &rpb.FileDescriptorResponse{FileDescriptorProto: b}, //nolint:staticcheck // SA1019: we want to keep using v1alpha
+				}
+			}
+		case *rpb.ServerReflectionRequest_FileContainingExtension:
+			typeName := req.FileContainingExtension.ContainingType //nolint:staticcheck // SA1019: we want to keep using v1alpha
+			extNum := req.FileContainingExtension.ExtensionNumber  //nolint:staticcheck // SA1019: we want to keep using v1alpha
+			b, err := s.fileDescEncodingContainingExtension(typeName, extNum, sentFileDescriptors)
+			if err != nil {
+				out.MessageResponse = &rpb.ServerReflectionResponse_ErrorResponse{
+					ErrorResponse: &rpb.ErrorResponse{ //nolint:staticcheck // SA1019: we want to keep using v1alpha
+						ErrorCode:    int32(codes.NotFound),
+						ErrorMessage: err.Error(),
+					},
+				}
+			} else {
+				out.MessageResponse = &rpb.ServerReflectionResponse_FileDescriptorResponse{
+					FileDescriptorResponse: &rpb.FileDescriptorResponse{FileDescriptorProto: b}, //nolint:staticcheck // SA1019: we want to keep using v1alpha
+				}
+			}
+		case *rpb.ServerReflectionRequest_AllExtensionNumbersOfType:
+			extNums, err := s.allExtensionNumbersForTypeName(req.AllExtensionNumbersOfType) //nolint:staticcheck // SA1019: we want to keep using v1alpha
+			if err != nil {
+				out.MessageResponse = &rpb.ServerReflectionResponse_ErrorResponse{
+					ErrorResponse: &rpb.ErrorResponse{ //nolint:staticcheck // SA1019: we want to keep using v1alpha
+						ErrorCode:    int32(codes.NotFound),
+						ErrorMessage: err.Error(),
+					},
+				}
+				log.Printf("OH NO: %s", err)
+			} else {
+				out.MessageResponse = &rpb.ServerReflectionResponse_AllExtensionNumbersResponse{
+					AllExtensionNumbersResponse: &rpb.ExtensionNumberResponse{ //nolint:staticcheck // SA1019: we want to keep using v1alpha
+						BaseTypeName:    req.AllExtensionNumbersOfType, //nolint:staticcheck // SA1019: we want to keep using v1alpha
+						ExtensionNumber: extNums,
+					},
+				}
+			}
+		case *rpb.ServerReflectionRequest_ListServices:
+			svcNames, _ := s.getSymbols()
+			serviceResponses := make([]*rpb.ServiceResponse, len(svcNames)) //nolint:staticcheck // SA1019: we want to keep using v1alpha
+			for i, n := range svcNames {
+				serviceResponses[i] = &rpb.ServiceResponse{ //nolint:staticcheck // SA1019: we want to keep using v1alpha
+					Name: n,
+				}
+			}
+			out.MessageResponse = &rpb.ServerReflectionResponse_ListServicesResponse{
+				ListServicesResponse: &rpb.ListServiceResponse{ //nolint:staticcheck // SA1019: we want to keep using v1alpha
+					Service: serviceResponses,
+				},
+			}
+		default:
+			return status.Errorf(codes.InvalidArgument, "invalid MessageRequest: %v", in.MessageRequest)
+		}
+		if err := stream.Send(out); err != nil {
+			return err
+		}
+	}
+}
--- a/server/v2/api/grpc/server.go
+++ b/server/v2/api/grpc/server.go
@ -0,0 +1,187 @@
+package grpc
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"net"
+
+	gogogrpc "github.com/cosmos/gogoproto/grpc"
+	gogoproto "github.com/cosmos/gogoproto/proto"
+	"github.com/spf13/viper"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/encoding"
+	"google.golang.org/protobuf/proto"
+
+	_ "cosmossdk.io/api/amino" // Import amino.proto file for reflection
+	appmanager "cosmossdk.io/core/app"
+	"cosmossdk.io/log"
+	"cosmossdk.io/server/v2/api/grpc/gogoreflection"
+)
+
+const serverName = "grpc-server"
+
+type GRPCServer struct {
+	logger log.Logger
+
+	grpcSrv *grpc.Server
+	config  *Config
+}
+
+type GRPCService interface {
+	// RegisterGRPCServer registers gRPC services directly with the gRPC server.
+	RegisterGRPCServer(gogogrpc.Server)
+}
+
+// New returns a correctly configured and initialized gRPC server.
+// Note, the caller is responsible for starting the server.
+func New(logger log.Logger, v *viper.Viper, interfaceRegistry appmanager.InterfaceRegistry, app GRPCService) (GRPCServer, error) {
+	cfg := DefaultConfig()
+	if v != nil {
+		if err := v.Sub(serverName).Unmarshal(&cfg); err != nil {
+			return GRPCServer{}, fmt.Errorf("failed to unmarshal config: %w", err)
+		}
+	}
+
+	grpcSrv := grpc.NewServer(
+		grpc.ForceServerCodec(newProtoCodec(interfaceRegistry).GRPCCodec()),
+		grpc.MaxSendMsgSize(cfg.MaxSendMsgSize),
+		grpc.MaxRecvMsgSize(cfg.MaxRecvMsgSize),
+	)
+
+	app.RegisterGRPCServer(grpcSrv)
+
+	// Reflection allows external clients to see what services and methods
+	// the gRPC server exposes.
+	gogoreflection.Register(grpcSrv)
+
+	return GRPCServer{
+		grpcSrv: grpcSrv,
+		config:  cfg,
+		logger:  logger.With(log.ModuleKey, serverName),
+	}, nil
+}
+
+func (g GRPCServer) Name() string {
+	return serverName
+}
+
+func (g GRPCServer) Start(ctx context.Context) error {
+	listener, err := net.Listen("tcp", g.config.Address)
+	if err != nil {
+		return fmt.Errorf("failed to listen on address %s: %w", g.config.Address, err)
+	}
+
+	errCh := make(chan error)
+
+	// Start the gRPC in an external goroutine as Serve is blocking and will return
+	// an error upon failure, which we'll send on the error channel that will be
+	// consumed by the for block below.
+	go func() {
+		g.logger.Info("starting gRPC server...", "address", g.config.Address)
+		errCh <- g.grpcSrv.Serve(listener)
+	}()
+
+	// Start a blocking select to wait for an indication to stop the server or that
+	// the server failed to start properly.
+	err = <-errCh
+	g.logger.Error("failed to start gRPC server", "err", err)
+	return err
+}
+
+func (g GRPCServer) Stop(ctx context.Context) error {
+	g.logger.Info("stopping gRPC server...", "address", g.config.Address)
+	g.grpcSrv.GracefulStop()
+
+	return nil
+}
+
+func (g GRPCServer) Config() any {
+	if g.config == nil || g.config == (&Config{}) {
+		return DefaultConfig()
+	}
+
+	return g.config
+}
+
+type protoCodec struct {
+	interfaceRegistry appmanager.InterfaceRegistry
+}
+
+// newProtoCodec returns a reference to a new ProtoCodec
+func newProtoCodec(interfaceRegistry appmanager.InterfaceRegistry) *protoCodec {
+	return &protoCodec{
+		interfaceRegistry: interfaceRegistry,
+	}
+}
+
+// Marshal implements BinaryMarshaler.Marshal method.
+// NOTE: this function must be used with a concrete type which
+// implements proto.Message. For interface please use the codec.MarshalInterface
+func (pc *protoCodec) Marshal(o gogoproto.Message) ([]byte, error) {
+	// Size() check can catch the typed nil value.
+	if o == nil || gogoproto.Size(o) == 0 {
+		// return empty bytes instead of nil, because nil has special meaning in places like store.Set
+		return []byte{}, nil
+	}
+
+	return gogoproto.Marshal(o)
+}
+
+// Unmarshal implements BinaryMarshaler.Unmarshal method.
+// NOTE: this function must be used with a concrete type which
+// implements proto.Message. For interface please use the codec.UnmarshalInterface
+func (pc *protoCodec) Unmarshal(bz []byte, ptr gogoproto.Message) error {
+	err := gogoproto.Unmarshal(bz, ptr)
+	if err != nil {
+		return err
+	}
+	// err = codectypes.UnpackInterfaces(ptr, pc.interfaceRegistry) // TODO: identify if needed for grpc
+	// if err != nil {
+	// 	return err
+	// }
+	return nil
+}
+
+func (pc *protoCodec) Name() string {
+	return "cosmos-sdk-grpc-codec"
+}
+
+// GRPCCodec returns the gRPC Codec for this specific ProtoCodec
+func (pc *protoCodec) GRPCCodec() encoding.Codec {
+	return &grpcProtoCodec{cdc: pc}
+}
+
+// grpcProtoCodec is the implementation of the gRPC proto codec.
+type grpcProtoCodec struct {
+	cdc appmanager.ProtoCodec
+}
+
+var errUnknownProtoType = errors.New("codec: unknown proto type") // sentinel error
+
+func (g grpcProtoCodec) Marshal(v any) ([]byte, error) {
+	switch m := v.(type) {
+	case proto.Message:
+		protov2MarshalOpts := proto.MarshalOptions{Deterministic: true}
+		return protov2MarshalOpts.Marshal(m)
+	case gogoproto.Message:
+		return g.cdc.Marshal(m)
+	default:
+		return nil, fmt.Errorf("%w: cannot marshal type %T", errUnknownProtoType, v)
+	}
+}
+
+func (g grpcProtoCodec) Unmarshal(data []byte, v any) error {
+	switch m := v.(type) {
+	case proto.Message:
+		return proto.Unmarshal(data, m)
+	case gogoproto.Message:
+		return g.cdc.Unmarshal(data, m)
+	default:
+		return fmt.Errorf("%w: cannot unmarshal type %T", errUnknownProtoType, v)
+	}
+}
+
+func (g grpcProtoCodec) Name() string {
+	return "cosmos-sdk-grpc-codec"
+}
--- a/server/v2/api/grpcgateway/config.go
+++ b/server/v2/api/grpcgateway/config.go
@ -0,0 +1,12 @@
+package grpcgateway
+
+type Config struct {
+	// Enable defines if the gRPC-gateway should be enabled.
+	Enable bool `mapstructure:"enable" toml:"enable" comment:"Enable defines if the gRPC-gateway should be enabled."`
+}
+
+func DefaultConfig() Config {
+	return Config{
+		Enable: true,
+	}
+}
--- a/server/v2/api/grpcgateway/server.go
+++ b/server/v2/api/grpcgateway/server.go
@ -0,0 +1,82 @@
+package grpcgateway
+
+import (
+	"net/http"
+	"strings"
+
+	gateway "github.com/cosmos/gogogateway"
+	"github.com/cosmos/gogoproto/jsonpb"
+	"github.com/gorilla/mux"
+	"github.com/grpc-ecosystem/grpc-gateway/runtime"
+	"google.golang.org/grpc"
+
+	"cosmossdk.io/log"
+)
+
+const (
+	// GRPCBlockHeightHeader is the gRPC header for block height.
+	GRPCBlockHeightHeader = "x-cosmos-block-height"
+)
+
+type Server struct {
+	logger            log.Logger
+	GRPCSrv           *grpc.Server
+	GRPCGatewayRouter *runtime.ServeMux
+	config            Config
+}
+
+// New creates a new gRPC-gateway server.
+func New(logger log.Logger, grpcSrv *grpc.Server, cfg Config, ir jsonpb.AnyResolver) *Server {
+	// The default JSON marshaller used by the gRPC-Gateway is unable to marshal non-nullable non-scalar fields.
+	// Using the gogo/gateway package with the gRPC-Gateway WithMarshaler option fixes the scalar field marshaling issue.
+	marshalerOption := &gateway.JSONPb{
+		EmitDefaults: true,
+		Indent:       "",
+		OrigName:     true,
+		AnyResolver:  ir,
+	}
+	return &Server{
+		logger: logger,
+		GRPCGatewayRouter: runtime.NewServeMux(
+			// Custom marshaler option is required for gogo proto
+			runtime.WithMarshalerOption(runtime.MIMEWildcard, marshalerOption),
+
+			// This is necessary to get error details properly
+			// marshaled in unary requests.
+			runtime.WithProtoErrorHandler(runtime.DefaultHTTPProtoErrorHandler),
+
+			// Custom header matcher for mapping request headers to
+			// GRPC metadata
+			runtime.WithIncomingHeaderMatcher(CustomGRPCHeaderMatcher),
+		),
+		config: cfg,
+	}
+}
+
+// CustomGRPCHeaderMatcher for mapping request headers to
+// GRPC metadata.
+// HTTP headers that start with 'Grpc-Metadata-' are automatically mapped to
+// gRPC metadata after removing prefix 'Grpc-Metadata-'. We can use this
+// CustomGRPCHeaderMatcher if headers don't start with `Grpc-Metadata-`
+func CustomGRPCHeaderMatcher(key string) (string, bool) {
+	switch strings.ToLower(key) {
+	case GRPCBlockHeightHeader:
+		return GRPCBlockHeightHeader, true
+
+	default:
+		return runtime.DefaultHeaderMatcher(key)
+	}
+}
+
+// Register implements registers a grpc-gateway server
+func (s *Server) Register(r mux.Router) error {
+	// configure grpc-gatway server
+	if s.config.Enable {
+		r.PathPrefix("/").Handler(http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
+			// Fall back to grpc gateway server.
+			s.GRPCGatewayRouter.ServeHTTP(w, req)
+		}))
+	}
+
+	return nil
+}
--- a/server/v2/api/telemetry/config.go
+++ b/server/v2/api/telemetry/config.go
@ -0,0 +1,42 @@
+package telemetry
+
+type Config struct {
+	// Prefixed with keys to separate services
+	ServiceName string `mapstructure:"service-name" toml:"service-name" comment:"Prefixed with keys to separate services."`
+
+	// Enabled enables the application telemetry functionality. When enabled,
+	// an in-memory sink is also enabled by default. Operators may also enabled
+	// other sinks such as Prometheus.
+	Enabled bool `mapstructure:"enabled" toml:"enabled" comment:"Enabled enables the application telemetry functionality. When enabled, an in-memory sink is also enabled by default. Operators may also enabled other sinks such as Prometheus."`
+
+	// Enable prefixing gauge values with hostname
+	EnableHostname bool `mapstructure:"enable-hostname" toml:"enable-hostname" comment:"Enable prefixing gauge values with hostname."`
+
+	// Enable adding hostname to labels
+	EnableHostnameLabel bool `mapstructure:"enable-hostname-label" toml:"enable-hostname-label" comment:"Enable adding hostname to labels."`
+
+	// Enable adding service to labels
+	EnableServiceLabel bool `mapstructure:"enable-service-label" toml:"enable-service-label" comment:"Enable adding service to labels."`
+
+	// PrometheusRetentionTime, when positive, enables a Prometheus metrics sink.
+	// It defines the retention duration in seconds.
+	PrometheusRetentionTime int64 `mapstructure:"prometheus-retention-time" toml:"prometheus-retention-time" comment:"PrometheusRetentionTime, when positive, enables a Prometheus metrics sink. It defines the retention duration in seconds."`
+
+	// GlobalLabels defines a global set of name/value label tuples applied to all
+	// metrics emitted using the wrapper functions defined in telemetry package.
+	//
+	// Example:
+	// [["chain_id", "cosmoshub-1"]]
+	GlobalLabels [][]string `mapstructure:"global-labels" toml:"global-labels" comment:"GlobalLabels defines a global set of name/value label tuples applied to all metrics emitted using the wrapper functions defined in telemetry package.\n Example:\n  [[\"chain_id\", \"cosmoshub-1\"]]"`
+
+	// MetricsSink defines the type of metrics backend to use.
+	MetricsSink string `mapstructure:"type" toml:"metrics-sink" comment:"MetricsSink defines the type of metrics backend to use. Default is in memory"`
+
+	// StatsdAddr defines the address of a statsd server to send metrics to.
+	// Only utilized if MetricsSink is set to "statsd" or "dogstatsd".
+	StatsdAddr string `mapstructure:"statsd-addr" toml:"stats-addr" comment:"StatsdAddr defines the address of a statsd server to send metrics to. Only utilized if MetricsSink is set to \"statsd\" or \"dogstatsd\"."`
+
+	// DatadogHostname defines the hostname to use when emitting metrics to
+	// Datadog. Only utilized if MetricsSink is set to "dogstatsd".
+	DatadogHostname string `mapstructure:"datadog-hostname" toml:"data-dog-hostname" comment:"DatadogHostname defines the hostname to use when emitting metrics to Datadog. Only utilized if MetricsSink is set to \"dogstatsd\"."`
+}
--- a/server/v2/api/telemetry/metrics.go
+++ b/server/v2/api/telemetry/metrics.go
@ -0,0 +1,188 @@
+package telemetry
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"time"
+
+	"github.com/hashicorp/go-metrics"
+	"github.com/hashicorp/go-metrics/datadog"
+	metricsprom "github.com/hashicorp/go-metrics/prometheus"
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/common/expfmt"
+)
+
+// GlobalLabels defines the set of global labels that will be applied to all
+// metrics emitted using the telemetry package function wrappers.
+var GlobalLabels = []metrics.Label{} // nolint: ignore // false positive
+
+// NewLabel creates a new instance of Label with name and value
+func NewLabel(name, value string) metrics.Label {
+	return metrics.Label{Name: name, Value: value}
+}
+
+// Metrics supported format types.
+const (
+	FormatDefault    = ""
+	FormatPrometheus = "prometheus"
+	FormatText       = "text"
+	ContentTypeText  = `text/plain; version=` + expfmt.TextVersion + `; charset=utf-8`
+
+	MetricSinkInMem      = "mem"
+	MetricSinkStatsd     = "statsd"
+	MetricSinkDogsStatsd = "dogstatsd"
+)
+
+// DisplayableSink is an interface that defines a method for displaying metrics.
+type DisplayableSink interface {
+	DisplayMetrics(resp http.ResponseWriter, req *http.Request) (any, error)
+}
+
+// Metrics defines a wrapper around application telemetry functionality. It allows
+// metrics to be gathered at any point in time. When creating a Metrics object,
+// internally, a global metrics is registered with a set of sinks as configured
+// by the operator. In addition to the sinks, when a process gets a SIGUSR1, a
+// dump of formatted recent metrics will be sent to STDERR.
+type Metrics struct {
+	sink              metrics.MetricSink
+	prometheusEnabled bool
+}
+
+// GatherResponse is the response type of registered metrics
+type GatherResponse struct {
+	Metrics     []byte
+	ContentType string
+}
+
+// New creates a new instance of Metrics
+func New(cfg Config) (_ *Metrics, rerr error) {
+	if !cfg.Enabled {
+		return nil, nil
+	}
+
+	if numGlobalLabels := len(cfg.GlobalLabels); numGlobalLabels > 0 {
+		parsedGlobalLabels := make([]metrics.Label, numGlobalLabels)
+		for i, gl := range cfg.GlobalLabels {
+			parsedGlobalLabels[i] = NewLabel(gl[0], gl[1])
+		}
+		GlobalLabels = parsedGlobalLabels
+	}
+
+	metricsConf := metrics.DefaultConfig(cfg.ServiceName)
+	metricsConf.EnableHostname = cfg.EnableHostname
+	metricsConf.EnableHostnameLabel = cfg.EnableHostnameLabel
+
+	var (
+		sink metrics.MetricSink
+		err  error
+	)
+	switch cfg.MetricsSink {
+	case MetricSinkStatsd:
+		sink, err = metrics.NewStatsdSink(cfg.StatsdAddr)
+	case MetricSinkDogsStatsd:
+		sink, err = datadog.NewDogStatsdSink(cfg.StatsdAddr, cfg.DatadogHostname)
+	default:
+		memSink := metrics.NewInmemSink(10*time.Second, time.Minute)
+		sink = memSink
+		inMemSig := metrics.DefaultInmemSignal(memSink)
+		defer func() {
+			if rerr != nil {
+				inMemSig.Stop()
+			}
+		}()
+	}
+
+	if err != nil {
+		return nil, err
+	}
+
+	m := &Metrics{sink: sink}
+	fanout := metrics.FanoutSink{sink}
+
+	if cfg.PrometheusRetentionTime > 0 {
+		m.prometheusEnabled = true
+		prometheusOpts := metricsprom.PrometheusOpts{
+			Expiration: time.Duration(cfg.PrometheusRetentionTime) * time.Second,
+		}
+
+		promSink, err := metricsprom.NewPrometheusSinkFrom(prometheusOpts)
+		if err != nil {
+			return nil, err
+		}
+
+		fanout = append(fanout, promSink)
+	}
+
+	if _, err := metrics.NewGlobal(metricsConf, fanout); err != nil {
+		return nil, err
+	}
+
+	return m, nil
+}
+
+// Gather collects all registered metrics and returns a GatherResponse where the
+// metrics are encoded depending on the type. Metrics are either encoded via
+// Prometheus or JSON if in-memory.
+func (m *Metrics) Gather(format string) (GatherResponse, error) {
+	switch format {
+	case FormatPrometheus:
+		return m.gatherPrometheus()
+
+	case FormatText:
+		return m.gatherGeneric()
+
+	case FormatDefault:
+		return m.gatherGeneric()
+
+	default:
+		return GatherResponse{}, fmt.Errorf("unsupported metrics format: %s", format)
+	}
+}
+
+// gatherPrometheus collects Prometheus metrics and returns a GatherResponse.
+// If Prometheus metrics are not enabled, it returns an error.
+func (m *Metrics) gatherPrometheus() (GatherResponse, error) {
+	if !m.prometheusEnabled {
+		return GatherResponse{}, fmt.Errorf("prometheus metrics are not enabled")
+	}
+
+	metricsFamilies, err := prometheus.DefaultGatherer.Gather()
+	if err != nil {
+		return GatherResponse{}, fmt.Errorf("failed to gather prometheus metrics: %w", err)
+	}
+
+	buf := &bytes.Buffer{}
+	defer buf.Reset()
+
+	e := expfmt.NewEncoder(buf, expfmt.NewFormat(expfmt.TypeTextPlain))
+
+	for _, mf := range metricsFamilies {
+		if err := e.Encode(mf); err != nil {
+			return GatherResponse{}, fmt.Errorf("failed to encode prometheus metrics: %w", err)
+		}
+	}
+
+	return GatherResponse{ContentType: ContentTypeText, Metrics: buf.Bytes()}, nil
+}
+
+// gatherGeneric collects generic metrics and returns a GatherResponse.
+func (m *Metrics) gatherGeneric() (GatherResponse, error) {
+	gm, ok := m.sink.(DisplayableSink)
+	if !ok {
+		return GatherResponse{}, fmt.Errorf("non in-memory metrics sink does not support generic format")
+	}
+
+	summary, err := gm.DisplayMetrics(nil, nil)
+	if err != nil {
+		return GatherResponse{}, fmt.Errorf("failed to gather in-memory metrics: %w", err)
+	}
+
+	content, err := json.Marshal(summary)
+	if err != nil {
+		return GatherResponse{}, fmt.Errorf("failed to encode in-memory metrics: %w", err)
+	}
+
+	return GatherResponse{ContentType: "application/json", Metrics: content}, nil
+}
--- a/server/v2/api/telemetry/server.go
+++ b/server/v2/api/telemetry/server.go
@ -0,0 +1,47 @@
+package telemetry
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"strings"
+
+	"github.com/gorilla/mux"
+)
+
+func RegisterMetrics(r mux.Router, cfg Config) (*Metrics, error) {
+	m, err := New(cfg)
+	if err != nil {
+		return nil, err
+	}
+
+	metricsHandler := func(w http.ResponseWriter, r *http.Request) {
+		format := strings.TrimSpace(r.FormValue("format"))
+
+		gr, err := m.Gather(format)
+		if err != nil {
+			w.Header().Set("Content-Type", "application/json")
+			w.WriteHeader(http.StatusBadRequest)
+			bz, err := json.Marshal(errorResponse{Code: 400, Error: fmt.Sprintf("failed to gather metrics: %s", err)})
+			if err != nil {
+				return
+			}
+			_, _ = w.Write(bz)
+
+			return
+		}
+
+		w.Header().Set("Content-Type", gr.ContentType)
+		_, _ = w.Write(gr.Metrics)
+	}
+
+	r.HandleFunc("/metrics", metricsHandler).Methods("GET")
+
+	return m, nil
+}
+
+// errorResponse defines the attributes of a JSON error response.
+type errorResponse struct {
+	Code  int    `json:"code,omitempty"`
+	Error string `json:"error"`
+}
--- a/server/v2/commands.go
+++ b/server/v2/commands.go
@ -0,0 +1,76 @@
+package serverv2
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"os"
+	"os/signal"
+	"path/filepath"
+	"syscall"
+
+	"github.com/spf13/cobra"
+
+	"cosmossdk.io/log"
+)
+
+func Commands(logger log.Logger, homePath string, modules ...ServerModule) (CLIConfig, error) {
+	if len(modules) == 0 {
+		// TODO figure if we should define default modules
+		// and if so it should be done here to avoid uncessary dependencies
+		return CLIConfig{}, errors.New("no modules provided")
+	}
+
+	v, err := ReadConfig(filepath.Join(homePath, "config"))
+	if err != nil {
+		return CLIConfig{}, fmt.Errorf("failed to read config: %w", err)
+	}
+
+	server := NewServer(logger, modules...)
+	startCmd := &cobra.Command{
+		Use:   "start",
+		Short: "Run the application",
+		RunE: func(cmd *cobra.Command, args []string) error {
+			if err := v.BindPFlags(cmd.Flags()); err != nil { // the server modules are already instantiated here, so binding the flags is useless.
+				return err
+			}
+
+			srvConfig := Config{StartBlock: true}
+			ctx := cmd.Context()
+			ctx = context.WithValue(ctx, ServerContextKey, srvConfig)
+			ctx, cancelFn := context.WithCancel(ctx)
+			go func() {
+				sigCh := make(chan os.Signal, 1)
+				signal.Notify(sigCh, syscall.SIGINT, syscall.SIGTERM)
+				sig := <-sigCh
+				cancelFn()
+				cmd.Printf("caught %s signal\n", sig.String())
+
+				if err := server.Stop(ctx); err != nil {
+					cmd.PrintErrln("failed to stop servers:", err)
+				}
+			}()
+
+			if err := server.Start(ctx); err != nil {
+				return fmt.Errorf("failed to start servers: %w", err)
+			}
+
+			return nil
+		},
+	}
+
+	cmds := server.CLICommands()
+	cmds.Commands = append(cmds.Commands, startCmd)
+
+	return cmds, nil
+}
+
+func AddCommands(rootCmd *cobra.Command, logger log.Logger, homePath string, modules ...ServerModule) error {
+	cmds, err := Commands(logger, homePath, modules...)
+	if err != nil {
+		return err
+	}
+
+	rootCmd.AddCommand(cmds.Commands...)
+	return nil
+}
--- a/server/v2/config.go
+++ b/server/v2/config.go
@ -0,0 +1,24 @@
+package serverv2
+
+import "github.com/spf13/cobra"
+
+var ServerContextKey = struct{}{}
+
+// Config is the config of the main server.
+type Config struct {
+	// StartBlock indicates if the server should block or not.
+	// If true, the server will block until the context is canceled.
+	StartBlock bool
+}
+
+// CLIConfig defines the CLI configuration for a module server.
+type CLIConfig struct {
+	// Commands defines the main command of a module server.
+	Commands []*cobra.Command
+	// Queries defines the query commands of a module server.
+	// Those commands are meant to be added in the root query command.
+	Queries []*cobra.Command
+	// Txs defines the tx commands of a module server.
+	// Those commands are meant to be added in the root tx command.
+	Txs []*cobra.Command
+}
--- a/server/v2/flags.go
+++ b/server/v2/flags.go
@ -0,0 +1,11 @@
+package serverv2
+
+const (
+	// Logging flags
+	FlagLogLevel   = "log_level"
+	FlagLogFormat  = "log_format"
+	FlagLogNoColor = "log_no_color"
+	FlagTrace      = "trace"
+
+	OutputFormatJSON = "json"
+)
--- a/server/v2/go.mod
+++ b/server/v2/go.mod
@ -0,0 +1,85 @@
+module cosmossdk.io/server/v2
+
+go 1.21
+
+replace (
+	cosmossdk.io/api => ../../api
+	cosmossdk.io/core => ../../core
+	cosmossdk.io/depinject => ../../depinject
+	cosmossdk.io/server/v2 => .
+	cosmossdk.io/server/v2/appmanager => ./appmanager
+	cosmossdk.io/server/v2/stf => ./stf
+	cosmossdk.io/x/tx => ../../x/tx
+)
+
+require (
+	cosmossdk.io/api v0.7.5
+	cosmossdk.io/core v0.12.1-0.20231114100755-569e3ff6a0d7
+	cosmossdk.io/log v1.3.1
+	github.com/cosmos/cosmos-proto v1.0.0-beta.5
+	github.com/cosmos/gogogateway v1.2.0
+	github.com/cosmos/gogoproto v1.4.12
+	github.com/golang/protobuf v1.5.4
+	github.com/gorilla/mux v1.8.1
+	github.com/grpc-ecosystem/grpc-gateway v1.16.0
+	github.com/hashicorp/go-hclog v1.6.2
+	github.com/hashicorp/go-metrics v0.5.3
+	github.com/hashicorp/go-plugin v1.6.0
+	github.com/pelletier/go-toml/v2 v2.1.1
+	github.com/prometheus/client_golang v1.19.0
+	github.com/prometheus/common v0.52.2
+	github.com/rs/zerolog v1.32.0
+	github.com/spf13/cobra v1.8.0
+	github.com/spf13/viper v1.18.2
+	github.com/stretchr/testify v1.9.0
+	golang.org/x/sync v0.7.0
+	google.golang.org/grpc v1.64.0
+	google.golang.org/protobuf v1.34.1
+)
+
+require (
+	github.com/DataDog/datadog-go v3.2.0+incompatible // indirect
+	github.com/beorn7/perks v1.0.1 // indirect
+	github.com/cespare/xxhash/v2 v2.3.0 // indirect
+	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
+	github.com/fatih/color v1.15.0 // indirect
+	github.com/fsnotify/fsnotify v1.7.0 // indirect
+	github.com/gogo/googleapis v1.4.1 // indirect
+	github.com/gogo/protobuf v1.3.2 // indirect
+	github.com/google/go-cmp v0.6.0 // indirect
+	github.com/hashicorp/go-immutable-radix v1.3.1 // indirect
+	github.com/hashicorp/go-uuid v1.0.1 // indirect
+	github.com/hashicorp/golang-lru v1.0.2 // indirect
+	github.com/hashicorp/hcl v1.0.0 // indirect
+	github.com/hashicorp/yamux v0.1.1 // indirect
+	github.com/inconshreveable/mousetrap v1.1.0 // indirect
+	github.com/jhump/protoreflect v1.15.3 // indirect
+	github.com/magiconair/properties v1.8.7 // indirect
+	github.com/mattn/go-colorable v0.1.13 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
+	github.com/mitchellh/go-testing-interface v1.14.1 // indirect
+	github.com/mitchellh/mapstructure v1.5.0 // indirect
+	github.com/oklog/run v1.1.0 // indirect
+	github.com/pkg/errors v0.9.1 // indirect
+	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
+	github.com/prometheus/client_model v0.6.1 // indirect
+	github.com/prometheus/procfs v0.13.0 // indirect
+	github.com/rogpeppe/go-internal v1.12.0 // indirect
+	github.com/sagikazarmark/locafero v0.4.0 // indirect
+	github.com/sagikazarmark/slog-shim v0.1.0 // indirect
+	github.com/sourcegraph/conc v0.3.0 // indirect
+	github.com/spf13/afero v1.11.0 // indirect
+	github.com/spf13/cast v1.6.0 // indirect
+	github.com/spf13/pflag v1.0.5 // indirect
+	github.com/subosito/gotenv v1.6.0 // indirect
+	go.uber.org/multierr v1.10.0 // indirect
+	golang.org/x/exp v0.0.0-20240404231335-c0f41cb1a7a0 // indirect
+	golang.org/x/net v0.25.0 // indirect
+	golang.org/x/sys v0.20.0 // indirect
+	golang.org/x/text v0.15.0 // indirect
+	google.golang.org/genproto v0.0.0-20240227224415-6ceb2ff114de // indirect
+	google.golang.org/genproto/googleapis/api v0.0.0-20240318140521-94a12d6c2237 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20240513163218-0867130af1f8 // indirect
+	gopkg.in/ini.v1 v1.67.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)
--- a/server/v2/go.sum
+++ b/server/v2/go.sum
@ -0,0 +1,393 @@
+cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cosmossdk.io/log v1.3.1 h1:UZx8nWIkfbbNEWusZqzAx3ZGvu54TZacWib3EzUYmGI=
+cosmossdk.io/log v1.3.1/go.mod h1:2/dIomt8mKdk6vl3OWJcPk2be3pGOS8OQaLUM/3/tCM=
+github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/DataDog/datadog-go v3.2.0+incompatible h1:qSG2N4FghB1He/r2mFrWKCaL7dXCilEuNEeAn20fdD4=
+github.com/DataDog/datadog-go v3.2.0+incompatible/go.mod h1:LButxg5PwREeZtORoXG3tL4fMGNddJ+vMq1mwgfaqoQ=
+github.com/alecthomas/template v0.0.0-20160405071501-a0175ee3bccc/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
+github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
+github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
+github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
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+github.com/beorn7/perks v1.0.0/go.mod h1:KWe93zE9D1o94FZ5RNwFwVgaQK1VOXiVxmqh+CedLV8=
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--- a/server/v2/logger.go
+++ b/server/v2/logger.go
@ -0,0 +1,44 @@
+package serverv2
+
+import (
+	"io"
+
+	"github.com/rs/zerolog"
+	"github.com/spf13/viper"
+
+	"cosmossdk.io/log"
+)
+
+// NewLogger creates a the default SDK logger.
+// It reads the log level and format from the server context.
+func NewLogger(v *viper.Viper, out io.Writer) (log.Logger, error) {
+	var opts []log.Option
+	if v.GetString(FlagLogFormat) == OutputFormatJSON {
+		opts = append(opts, log.OutputJSONOption())
+	}
+	opts = append(opts,
+		log.ColorOption(!v.GetBool(FlagLogNoColor)),
+		log.TraceOption(v.GetBool(FlagTrace)))
+
+	// check and set filter level or keys for the logger if any
+	logLvlStr := v.GetString(FlagLogLevel)
+	if logLvlStr == "" {
+		return log.NewLogger(out, opts...), nil
+	}
+
+	logLvl, err := zerolog.ParseLevel(logLvlStr)
+	switch {
+	case err != nil:
+		// If the log level is not a valid zerolog level, then we try to parse it as a key filter.
+		filterFunc, err := log.ParseLogLevel(logLvlStr)
+		if err != nil {
+			return nil, err
+		}
+
+		opts = append(opts, log.FilterOption(filterFunc))
+	default:
+		opts = append(opts, log.LevelOption(logLvl))
+	}
+
+	return log.NewLogger(out, opts...), nil
+}
--- a/server/v2/server.go
+++ b/server/v2/server.go
@ -0,0 +1,144 @@
+package serverv2
+
+import (
+	"context"
+	"fmt"
+	"os"
+
+	"github.com/pelletier/go-toml/v2"
+	"github.com/spf13/viper"
+	"golang.org/x/sync/errgroup"
+
+	"cosmossdk.io/log"
+)
+
+// ServerModule is a server module that can be started and stopped.
+type ServerModule interface {
+	Name() string
+
+	Start(context.Context) error
+	Stop(context.Context) error
+}
+
+// HasCLICommands is a server module that has CLI commands.
+type HasCLICommands interface {
+	CLICommands() CLIConfig
+}
+
+// HasConfig is a server module that has a config.
+type HasConfig interface {
+	Config() any
+}
+
+var _ ServerModule = (*Server)(nil)
+
+// Configs returns a viper instance of the config file
+func ReadConfig(configPath string) (*viper.Viper, error) {
+	v := viper.New()
+	v.SetConfigFile(configPath)
+	v.SetConfigType("toml")
+	if err := v.ReadInConfig(); err != nil {
+		return nil, fmt.Errorf("failed to read config: %s: %w", configPath, err)
+	}
+	v.WatchConfig()
+
+	return v, nil
+}
+
+type Server struct {
+	logger  log.Logger
+	modules []ServerModule
+}
+
+func NewServer(logger log.Logger, modules ...ServerModule) *Server {
+	return &Server{
+		logger:  logger,
+		modules: modules,
+	}
+}
+
+func (s *Server) Name() string {
+	return "server"
+}
+
+// Start starts all modules concurrently.
+func (s *Server) Start(ctx context.Context) error {
+	s.logger.Info("starting servers...")
+
+	g, ctx := errgroup.WithContext(ctx)
+	for _, mod := range s.modules {
+		mod := mod
+		g.Go(func() error {
+			return mod.Start(ctx)
+		})
+	}
+
+	if err := g.Wait(); err != nil {
+		return fmt.Errorf("failed to start servers: %w", err)
+	}
+
+	serverCfg := ctx.Value(ServerContextKey).(Config)
+	if serverCfg.StartBlock {
+		<-ctx.Done()
+	}
+
+	return nil
+}
+
+// Stop stops all modules concurrently.
+func (s *Server) Stop(ctx context.Context) error {
+	s.logger.Info("stopping servers...")
+
+	g, ctx := errgroup.WithContext(ctx)
+	for _, mod := range s.modules {
+		mod := mod
+		g.Go(func() error {
+			return mod.Stop(ctx)
+		})
+	}
+
+	return g.Wait()
+}
+
+// CLICommands returns all CLI commands of all modules.
+func (s *Server) CLICommands() CLIConfig {
+	commands := CLIConfig{}
+	for _, mod := range s.modules {
+		if climod, ok := mod.(HasCLICommands); ok {
+			commands.Commands = append(commands.Commands, climod.CLICommands().Commands...)
+			commands.Queries = append(commands.Queries, climod.CLICommands().Queries...)
+			commands.Txs = append(commands.Txs, climod.CLICommands().Txs...)
+		}
+	}
+
+	return commands
+}
+
+// Configs returns all configs of all server modules.
+func (s *Server) Configs() map[string]any {
+	cfgs := make(map[string]any)
+	for _, mod := range s.modules {
+		if configmod, ok := mod.(HasConfig); ok {
+			cfg := configmod.Config()
+			cfgs[mod.Name()] = cfg
+		}
+	}
+
+	return cfgs
+}
+
+// WriteConfig writes the config to the given path.
+// Note: it does not use viper.WriteConfigAs because we do not want to store flag values in the config.
+func (s *Server) WriteConfig(configPath string) error {
+	cfgs := s.Configs()
+	b, err := toml.Marshal(cfgs)
+	if err != nil {
+		return fmt.Errorf("failed to marshal config: %w", err)
+	}
+
+	if err := os.WriteFile(configPath, b, 0o600); err != nil {
+		return fmt.Errorf("failed to write config: %w", err)
+	}
+
+	return nil
+}
--- a/server/v2/server_mock_test.go
+++ b/server/v2/server_mock_test.go
@ -0,0 +1,50 @@
+package serverv2_test
+
+import (
+	"context"
+	"fmt"
+	"math/rand"
+)
+
+type mockServerConfig struct {
+	MockFieldOne string `mapstructure:"mock_field" toml:"mock_field" comment:"Mock field"`
+	MockFieldTwo int    `mapstructure:"mock_field_two" toml:"mock_field_two" comment:"Mock field two"`
+}
+
+func MockServerDefaultConfig() *mockServerConfig {
+	return &mockServerConfig{
+		MockFieldOne: "default",
+		MockFieldTwo: 1,
+	}
+}
+
+type mockServer struct {
+	name string
+	ch   chan string
+}
+
+func (s *mockServer) Name() string {
+	return s.name
+}
+
+func (s *mockServer) Start(ctx context.Context) error {
+	for ctx.Err() == nil {
+		s.ch <- fmt.Sprintf("%s mock server: %d", s.name, rand.Int())
+	}
+
+	return nil
+}
+
+func (s *mockServer) Stop(ctx context.Context) error {
+	for range s.ch {
+		if str := <-s.ch; str != "" {
+			fmt.Printf("clearing %s\n", str)
+		}
+	}
+
+	return nil
+}
+
+func (s *mockServer) Config() any {
+	return MockServerDefaultConfig()
+}
--- a/server/v2/server_test.go
+++ b/server/v2/server_test.go
@ -0,0 +1,116 @@
+package serverv2_test
+
+import (
+	"context"
+	"os"
+	"path/filepath"
+	"testing"
+	"time"
+
+	gogogrpc "github.com/cosmos/gogoproto/grpc"
+	gogoproto "github.com/cosmos/gogoproto/proto"
+	"github.com/spf13/viper"
+
+	"cosmossdk.io/log"
+	serverv2 "cosmossdk.io/server/v2"
+	grpc "cosmossdk.io/server/v2/api/grpc"
+)
+
+type mockGRPCService struct {
+	grpc.GRPCService
+}
+
+func (m *mockGRPCService) RegisterGRPCServer(gogogrpc.Server) {}
+
+type mockInterfaceRegistry struct{}
+
+func (*mockInterfaceRegistry) Resolve(typeUrl string) (gogoproto.Message, error) {
+	panic("not implemented")
+}
+
+func (*mockInterfaceRegistry) ListImplementations(ifaceTypeURL string) []string {
+	panic("not implemented")
+}
+func (*mockInterfaceRegistry) ListAllInterfaces() []string { panic("not implemented") }
+
+// TODO split this test into multiple tests
+// test read config
+// test write config
+// test server configs
+// test start empty
+// test start config exists
+// test stop
+func TestServer(t *testing.T) {
+	currentDir, err := os.Getwd()
+	if err != nil {
+		t.Log(err)
+		t.Fail()
+	}
+	configPath := filepath.Join(currentDir, "testdata", "app.toml")
+
+	v, err := serverv2.ReadConfig(configPath)
+	if err != nil {
+		v = viper.New()
+	}
+
+	logger := log.NewLogger(os.Stdout)
+	grpcServer, err := grpc.New(logger, v, &mockInterfaceRegistry{}, &mockGRPCService{})
+	if err != nil {
+		t.Log(err)
+		t.Fail()
+	}
+
+	mockServer := &mockServer{name: "mock-server-1", ch: make(chan string, 100)}
+
+	server := serverv2.NewServer(
+		logger,
+		grpcServer,
+		mockServer,
+	)
+
+	serverCfgs := server.Configs()
+	if serverCfgs[grpcServer.Name()].(*grpc.Config).Address != grpc.DefaultConfig().Address {
+		t.Logf("config is not equal: %v", serverCfgs[grpcServer.Name()])
+		t.Fail()
+	}
+	if serverCfgs[mockServer.Name()].(*mockServerConfig).MockFieldOne != MockServerDefaultConfig().MockFieldOne {
+		t.Logf("config is not equal: %v", serverCfgs[mockServer.Name()])
+		t.Fail()
+	}
+
+	// write config
+	if err := server.WriteConfig(configPath); err != nil {
+		t.Log(err)
+		t.Fail()
+	}
+
+	v, err = serverv2.ReadConfig(configPath)
+	if err != nil {
+		t.Log(err) // config should be created by WriteConfig
+		t.FailNow()
+	}
+	if v.GetString(grpcServer.Name()+".address") != grpc.DefaultConfig().Address {
+		t.Logf("config is not equal: %v", v)
+		t.Fail()
+	}
+
+	// start empty
+	ctx := context.Background()
+	ctx = context.WithValue(ctx, serverv2.ServerContextKey, serverv2.Config{StartBlock: true})
+	ctx, cancelFn := context.WithCancel(ctx)
+	go func() {
+		// wait 5sec and cancel context
+		<-time.After(5 * time.Second)
+		cancelFn()
+
+		if err := server.Stop(ctx); err != nil {
+			t.Logf("failed to stop servers: %s", err)
+			t.Fail()
+		}
+	}()
+
+	if err := server.Start(ctx); err != nil {
+		t.Log(err)
+		t.Fail()
+	}
+}
--- a/server/v2/streaming/README.md
+++ b/server/v2/streaming/README.md
@ -0,0 +1,30 @@
+# Cosmos-SDK Plugins
+
+This package contains an extensible plugin system for the Cosmos-SDK. The plugin system leverages the [hashicorp/go-plugin](https://github.com/hashicorp/go-plugin) system. This system is designed to work over RPC. 
+
+Although the `go-plugin` is built to work over RPC, it is currently only designed to work over a local network.
+
+## Pre requisites
+
+For an overview of supported features by the `go-plugin` system, please see https://github.com/hashicorp/go-plugin. The `go-plugin` documentation is located [here](https://github.com/hashicorp/go-plugin/tree/master/docs). You can also directly visit any of the links below:
+
+* [Writing plugins without Go](https://github.com/hashicorp/go-plugin/blob/master/docs/guide-plugin-write-non-go.md) 
+* [Go Plugin Tutorial](https://github.com/hashicorp/go-plugin/blob/master/docs/extensive-go-plugin-tutorial.md)
+* [Plugin Internals](https://github.com/hashicorp/go-plugin/blob/master/docs/internals.md)
+* [Plugin Architecture](https://www.youtube.com/watch?v=SRvm3zQQc1Q) (start here)
+
+## Exposing plugins
+
+To expose plugins to the plugin system, you will need to:
+
+1. Implement the gRPC message protocol service of the plugin
+2. Build the plugin binary
+3. Export it
+
+Read the plugin documentation in the [Streaming Plugins](#streaming-plugins) section for examples on how to build a plugin.
+
+## Streaming Plugins
+
+List of support streaming plugins
+
+* [State Streaming Plugin](plugin.md)
--- a/server/v2/streaming/config.go
+++ b/server/v2/streaming/config.go
@ -0,0 +1,25 @@
+package streaming
+
+// State Streaming configuration
+
+// StreamingConfig defines application configuration for external streaming services
+type StreamingConfig struct {
+	ListenerConfig ListenerConfig `mapstructure:"listener-config" toml:"listener-config" comment:"ListenerConfig defines application configuration for ABCIListener streaming service"`
+}
+
+// ListenerConfig defines application configuration for ABCIListener streaming service
+type ListenerConfig struct {
+	// List of kv store keys to stream out via gRPC.
+	// The store key names MUST match the module's StoreKey name.
+	//
+	// Example:
+	// ["acc", "bank", "gov", "staking", "mint"[,...]]
+	// ["*"] to expose all keys.
+	Keys []string `mapstructure:"keys" toml:"keys" comment:"List of kv store keys to stream out via gRPC. The store key names MUST match the module's StoreKey name. Example: [\"acc\", \"bank\", \"gov\", \"staking\", \"mint\"[,...]] [\"*\"] to expose all keys."`
+	// The plugin name used for streaming via gRPC.
+	// Streaming is only enabled if this is set.
+	// Supported plugins: abci
+	Plugin string `mapstructure:"plugin" toml:"plugin" comment:"The plugin name used for streaming via gRPC. Streaming is only enabled if this is set. Supported plugins: abci"`
+	// stop-node-on-err specifies whether to stop the node on message delivery error.
+	StopNodeOnErr bool `mapstructure:"stop-node-on-err" toml:"stop-node-on-err" comment:"stop-node-on-err specifies whether to stop the node on message delivery error."`
+}
--- a/server/v2/streaming/context.go
+++ b/server/v2/streaming/context.go
@ -0,0 +1,11 @@
+package streaming
+
+import "cosmossdk.io/log"
+
+// Context is an interface used by an App to pass context information
+// needed to process store streaming requests.
+type Context interface {
+	BlockHeight() int64
+	Logger() log.Logger
+	StreamingManager() Manager
+}
--- a/server/v2/streaming/examples/file/.gitignore
+++ b/server/v2/streaming/examples/file/.gitignore
@ -0,0 +1,2 @@
+# ignore the file plugin binary
+file
--- a/server/v2/streaming/examples/file/README.md
+++ b/server/v2/streaming/examples/file/README.md
@ -0,0 +1,17 @@
+# File Plugin
+
+The file plugin is an example plugin written in Go. It is intended for local testing and should not be used in production environments.
+
+## Build
+
+To build the plugin run the following command:
+
+```shell
+cd store
+```
+
+```shell
+go build -o streaming/abci/examples/file/file streaming/abci/examples/file/file.go
+```
+
+* The plugin will write files to the users home directory `~/`.
--- a/server/v2/streaming/examples/file/file.go
+++ b/server/v2/streaming/examples/file/file.go
@ -0,0 +1,78 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"path/filepath"
+
+	"cosmossdk.io/server/v2/streaming"
+	"github.com/hashicorp/go-plugin"
+)
+
+// FilePlugin is the implementation of the baseapp.ABCIListener interface
+// For Go plugins this is all that is required to process data sent over gRPC.
+type FilePlugin struct {
+	BlockHeight int64
+}
+
+func (a *FilePlugin) writeToFile(file string, data []byte) error {
+	home, err := os.UserHomeDir()
+	if err != nil {
+		return err
+	}
+
+	filename := fmt.Sprintf("%s/%s.txt", home, file)
+	f, err := os.OpenFile(filepath.Clean(filename), os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0o600)
+	if err != nil {
+		return err
+	}
+
+	if _, err := f.Write(data); err != nil {
+		f.Close() // ignore error; Write error takes precedence
+		return err
+	}
+
+	if err := f.Close(); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (a *FilePlugin) ListenDeliverBlock(ctx context.Context, req streaming.ListenDeliverBlockRequest) error {
+	d1 := []byte(fmt.Sprintf("%d:::%v\n", a.BlockHeight, req))
+	d2 := []byte(fmt.Sprintf("%d:::%v\n", a.BlockHeight, req))
+	if err := a.writeToFile("finalize-block-req", d1); err != nil {
+		return err
+	}
+	if err := a.writeToFile("finalize-block-res", d2); err != nil {
+		return err
+	}
+	return nil
+}
+
+func (a *FilePlugin) ListenStateChanges(ctx context.Context, changeSet []*streaming.StoreKVPair) error {
+	fmt.Printf("listen-commit: block_height=%d data=%v", a.BlockHeight, changeSet)
+	d1 := []byte(fmt.Sprintf("%d:::%v\n", a.BlockHeight, nil))
+	d2 := []byte(fmt.Sprintf("%d:::%v\n", a.BlockHeight, changeSet))
+	if err := a.writeToFile("commit-res", d1); err != nil {
+		return err
+	}
+	if err := a.writeToFile("state-change", d2); err != nil {
+		return err
+	}
+	return nil
+}
+
+func main() {
+	plugin.Serve(&plugin.ServeConfig{
+		HandshakeConfig: streaming.Handshake,
+		Plugins: map[string]plugin.Plugin{
+			"abci": &streaming.ListenerGRPCPlugin{Impl: &FilePlugin{}},
+		},
+
+		// A non-nil value here enables gRPC serving for this streaming...
+		GRPCServer: plugin.DefaultGRPCServer,
+	})
+}
--- a/server/v2/streaming/examples/stdout/stdout
+++ b/server/v2/streaming/examples/stdout/stdout
--- a/server/v2/streaming/examples/stdout/stdout.go
+++ b/server/v2/streaming/examples/stdout/stdout.go
@ -0,0 +1,41 @@
+package main
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/hashicorp/go-plugin"
+
+	"cosmossdk.io/server/v2/streaming"
+)
+
+// StdoutPlugin is the implementation of the ABCIListener interface
+// For Go plugins this is all that is required to process data sent over gRPC.
+type StdoutPlugin struct {
+	BlockHeight int64
+}
+
+func (a *StdoutPlugin) ListenDeliverBlock(ctx context.Context, req streaming.ListenDeliverBlockRequest) error {
+	a.BlockHeight = req.BlockHeight
+	// process tx messages (i.e: sent to external system)
+	fmt.Printf("listen-finalize-block: block-height=%d req=%v res=%v", a.BlockHeight, req, nil)
+	return nil
+}
+
+func (a *StdoutPlugin) ListenStateChanges(ctx context.Context, changeSet []*streaming.StoreKVPair) error {
+	// process block commit messages (i.e: sent to external system)
+	fmt.Printf("listen-commit: block_height=%d res=%v data=%v", a.BlockHeight, changeSet, nil)
+	return nil
+}
+
+func main() {
+	plugin.Serve(&plugin.ServeConfig{
+		HandshakeConfig: streaming.Handshake,
+		Plugins: map[string]plugin.Plugin{
+			"abci": &streaming.ListenerGRPCPlugin{Impl: &StdoutPlugin{}},
+		},
+
+		// A non-nil value here enables gRPC serving for this streaming...
+		GRPCServer: plugin.DefaultGRPCServer,
+	})
+}
--- a/server/v2/streaming/grpc.go
+++ b/server/v2/streaming/grpc.go
@ -0,0 +1,75 @@
+package streaming
+
+import (
+	"context"
+	"os"
+
+	"github.com/hashicorp/go-plugin"
+)
+
+var _ Listener = (*GRPCClient)(nil)
+
+// GRPCClient is an implementation of the ABCIListener interface that talks over RPC.
+type GRPCClient struct {
+	client ListenerServiceClient
+}
+
+// ListenEndBlock listens to end block request and responses.
+// In addition, it retrieves a types.Context from a context.Context instance.
+// It panics if a types.Context was not properly attached.
+// When the node is configured to stop on listening errors,
+// it will terminate immediately and exit with a non-zero code.
+func (m *GRPCClient) ListenDeliverBlock(goCtx context.Context, req ListenDeliverBlockRequest) error {
+	ctx := goCtx.(Context)
+	sm := ctx.StreamingManager()
+	_, err := m.client.ListenDeliverBlock(goCtx, &req)
+	if err != nil && sm.StopNodeOnErr {
+		ctx.Logger().Error("DeliverBLock listening hook failed", "height", ctx.BlockHeight(), "err", err)
+		cleanupAndExit()
+	}
+	return err
+}
+
+// ListenCommit listens to commit responses and state changes for the current block.
+// In addition, it retrieves a types.Context from a context.Context instance.
+// It panics if a types.Context was not properly attached.
+// When the node is configured to stop on listening errors,
+// it will terminate immediately and exit with a non-zero code.
+func (m *GRPCClient) ListenStateChanges(goCtx context.Context, changeSet []*StoreKVPair) error {
+	ctx := goCtx.(Context)
+	sm := ctx.StreamingManager()
+	request := &ListenStateChangesRequest{BlockHeight: ctx.BlockHeight(), ChangeSet: changeSet}
+	_, err := m.client.ListenStateChanges(goCtx, request)
+	if err != nil && sm.StopNodeOnErr {
+		ctx.Logger().Error("Commit listening hook failed", "height", ctx.BlockHeight(), "err", err)
+		cleanupAndExit()
+	}
+	return err
+}
+
+func cleanupAndExit() {
+	plugin.CleanupClients()
+	os.Exit(1)
+}
+
+var _ ListenerServiceServer = (*GRPCServer)(nil)
+
+// GRPCServer is the gRPC server that GRPCClient talks to.
+type GRPCServer struct {
+	// This is the real implementation
+	Impl Listener
+}
+
+func (m GRPCServer) ListenDeliverBlock(ctx context.Context, request *ListenDeliverBlockRequest) (*ListenDeliverBlockResponse, error) {
+	if err := m.Impl.ListenDeliverBlock(ctx, *request); err != nil {
+		return nil, err
+	}
+	return &ListenDeliverBlockResponse{}, nil
+}
+
+func (m GRPCServer) ListenStateChanges(ctx context.Context, request *ListenStateChangesRequest) (*ListenStateChangesResponse, error) {
+	if err := m.Impl.ListenStateChanges(ctx, request.ChangeSet); err != nil {
+		return nil, err
+	}
+	return &ListenStateChangesResponse{}, nil
+}
--- a/server/v2/streaming/grpc.pb.go
+++ b/server/v2/streaming/grpc.pb.go
--- a/server/v2/streaming/interface.go
+++ b/server/v2/streaming/interface.go
@ -0,0 +1,54 @@
+// Package abci contains shared data between the host and plugins.
+package streaming
+
+import (
+	"context"
+
+	"github.com/hashicorp/go-plugin"
+	"google.golang.org/grpc"
+)
+
+// Listener is the interface that we're exposing as a streaming service.
+// It hooks into the ABCI message processing of the BaseApp.
+// The error results are propagated to consensus state machine,
+// if you don't want to affect consensus, handle the errors internally and always return `nil` in these APIs.
+type Listener interface {
+	// ListenDeliverBlock updates the streaming service with the latest Delivered Block messages
+	ListenDeliverBlock(context.Context, ListenDeliverBlockRequest) error
+	// ListenCommit updates the steaming service with the latest Commit messages and state changes
+	ListenStateChanges(ctx context.Context, changeSet []*StoreKVPair) error
+}
+
+// Handshake is a common handshake that is shared by streaming and host.
+// This prevents users from executing bad plugins or executing a plugin
+// directory. It is a UX feature, not a security feature.
+var Handshake = plugin.HandshakeConfig{
+	// This isn't required when using VersionedPlugins
+	ProtocolVersion:  1,
+	MagicCookieKey:   "ABCI_LISTENER_PLUGIN",
+	MagicCookieValue: "ef78114d-7bdf-411c-868f-347c99a78345",
+}
+
+var _ plugin.GRPCPlugin = (*ListenerGRPCPlugin)(nil)
+
+// ListenerGRPCPlugin is the implementation of plugin.GRPCPlugin, so we can serve/consume this.
+type ListenerGRPCPlugin struct {
+	// GRPCPlugin must still implement the Plugin interface
+	plugin.Plugin
+	// Concrete implementation, written in Go. This is only used for plugins
+	// that are written in Go.
+	Impl Listener
+}
+
+func (p *ListenerGRPCPlugin) GRPCServer(_ *plugin.GRPCBroker, s *grpc.Server) error {
+	RegisterListenerServiceServer(s, &GRPCServer{Impl: p.Impl})
+	return nil
+}
+
+func (p *ListenerGRPCPlugin) GRPCClient(
+	_ context.Context,
+	_ *plugin.GRPCBroker,
+	c *grpc.ClientConn,
+) (interface{}, error) {
+	return &GRPCClient{client: NewListenerServiceClient(c)}, nil
+}
--- a/server/v2/streaming/plugin.md
+++ b/server/v2/streaming/plugin.md
@ -0,0 +1,212 @@
+# State Streaming Plugin (gRPC)
+
+<!-- TODO fix docs before final release -->
+
+The `Server/v2` package contains the interface for a [Listener](https://github.com/cosmos/cosmos-sdk/blob/main/baseapp/streaming.go)
+service used to write state changes out from individual KVStores to external systems,
+as described in [ADR-038](https://github.com/cosmos/cosmos-sdk/blob/main/docs/architecture/adr-038-state-listening.md).
+
+Specific `ABCIListener` service implementations are written and loaded as [hashicorp/go-plugin](https://github.com/hashicorp/go-plugin).
+
+## Implementation
+
+In this section we describe the implementation of the `ABCIListener` interface as a gRPC service.
+
+### Service Protocol
+
+The companion service protocol for the `Listener` interface is described below.
+See [proto/cosmos/store/streaming/abci/grpc.proto](https://github.com/cosmos/cosmos-sdk/blob/main/proto/cosmos/store/streaming/abci/grpc.proto) for full details.
+
+```protobuf reference
+https://github.com/cosmos/cosmos-sdk/blob/6cee22df52eb0cbb30e351fbb41f66d26c1f8300/proto/cosmos/store/streaming/abci/grpc.proto#L1-L36
+```
+
+### Generating the Code
+
+To generate the stubs the local client implementation can call, run the following command:
+
+```shell
+make proto-gen
+```
+
+For other languages you'll need to [download](https://github.com/cosmos/cosmos-sdk/blob/main/third_party/proto/README.md)
+the CosmosSDK protos into your project and compile. For language specific compilation instructions visit
+[https://github.com/grpc](https://github.com/grpc) and look in the `examples` folder of your
+language of choice `https://github.com/grpc/grpc-{language}/tree/master/examples` and [https://grpc.io](https://grpc.io)
+for the documentation.
+
+### gRPC Client and Server
+
+Implementing the ABCIListener gRPC client and server is a simple and straight forward process.
+
+To create the client and server we create a `ListenerGRPCPlugin` struct that implements the
+`plugin.GRPCPlugin` interface and a `Impl` property that will contain a concrete implementation
+of the `ABCIListener` plugin written in Go.
+
+#### The Interface
+
+The `Server/v2` `Listener` interface will be what will define the plugins capabilities.
+
+Boilerplate RPC implementation example of the `Listener` interface. ([store/streaming/abci/grpc.go](https://github.com/cosmos/cosmos-sdk/blob/main/store/streaming/abci/grpc.go))
+
+```go reference
+https://github.com/cosmos/cosmos-sdk/blob/f851e188b3b9d46e7c63fa514ad137e6d558fdd9/store/streaming/abci/grpc.go#L13-L79
+```
+
+Our `listener` service plugin. ([store/streaming/plugins/abci/v1/interface.go](interface.go))
+
+```go reference
+https://github.com/cosmos/cosmos-sdk/blob/f851e188b3b9d46e7c63fa514ad137e6d558fdd9/store/streaming/abci/interface.go#L13-L45
+```
+
+#### Plugin Implementation
+
+Plugin implementations can be in a completely separate package but will need access
+to the `Listener` interface. One thing to note here is that plugin implementations
+defined in the `ListenerGRPCPlugin.Impl` property are **only** required when building
+plugins in Go. They are pre-compiled into Go modules. The `GRPCServer.Impl` calls methods
+on this out-of-process plugin.
+
+For Go plugins this is all that is required to process data that is sent over gRPC.
+This provides the advantage of writing quick plugins that process data to different
+external systems (i.e: DB, File, DB, Kafka, etc.) without the need for implementing
+the gRPC server endpoints.
+
+```go
+// MyPlugin is the implementation of the ABCIListener interface
+// For Go plugins this is all that is required to process data sent over gRPC.
+type MyPlugin struct {
+	...
+}
+
+func (a FilePlugin) ListenFinalizeBlock(ctx context.Context, req abci.RequestBeginBlock, res abci.ResponseBeginBlock) error {
+	// process data
+	return nil
+}
+
+func (a FilePlugin) ListenCommit(ctx context.Context, res abci.ResponseCommit, changeSet []*store.StoreKVPair) error {
+    // process data
+    return nil
+}
+
+func main() {
+	plugin.Serve(&plugin.ServeConfig{
+		HandshakeConfig: v1.Handshake,
+		Plugins: map[string]plugin.Plugin{
+			"abci": &ABCIListenerGRPCPlugin{Impl: &MyPlugin{}},
+		},
+
+		// A non-nil value here enables gRPC serving for this streaming...
+		GRPCServer: plugin.DefaultGRPCServer,
+	})
+}
+```
+
+## Plugin Loading System
+
+A general purpose plugin loading system has been provided by the SDK to be able to load not just
+the `ABCIListener` service plugin but other protocol services as well. You can take a look
+at how plugins are loaded by the SDK in [store/streaming/streaming.go](https://github.com/cosmos/cosmos-sdk/blob/main/store/streaming/streaming.go)
+
+You'll need to add this in your `app.go`
+
+```go
+// app.go
+
+func NewApp(...) *App {
+
+    ...
+
+    // register streaming services
+    streamingCfg := cast.ToStringMap(appOpts.Get(baseapp.StreamingTomlKey))
+    for service := range streamingCfg {
+        pluginKey := fmt.Sprintf("%s.%s.%s", baseapp.StreamingTomlKey, service, baseapp.StreamingABCIPluginTomlKey)
+        pluginName := strings.TrimSpace(cast.ToString(appOpts.Get(pluginKey)))
+        if len(pluginName) > 0 {
+            logLevel := cast.ToString(appOpts.Get(flags.FlagLogLevel))
+            plugin, err := streaming.NewStreamingPlugin(pluginName, logLevel)
+            if err != nil {
+                tmos.Exit(err.Error())
+            }
+            if err := baseapp.RegisterStreamingPlugin(bApp, appOpts, keys, plugin); err != nil {
+                tmos.Exit(err.Error())
+            }
+        }
+    }
+
+    ...
+}
+```
+
+## Configuration
+
+Update the streaming section in `app.toml`
+
+```toml
+# Streaming allows nodes to stream state to external systems
+[streaming]
+
+# streaming.abci specifies the configuration for the ABCI Listener streaming service
+[streaming.abci]
+
+# List of kv store keys to stream out via gRPC
+# Set to ["*"] to expose all keys.
+keys = ["*"]
+
+# The plugin name used for streaming via gRPC
+# Supported plugins: abci
+plugin = "abci"
+
+# stop-node-on-err specifies whether to stop the node when the 
+stop-node-on-err = true
+```
+
+## Updating the protocol
+
+If you update the protocol buffers file, you can regenerate the file and plugins using the
+following commands from the project root directory. You do not need to run this if you're
+just trying the examples, you can skip ahead to the [Testing](#testing) section.
+
+```shell
+make proto-gen 
+```
+
+* stdout plugin; from inside the `store/` dir, run:
+
+```shell
+go build -o streaming/abci/examples/stdout/stdout streaming/abci/examples/stdout/stdout.go
+```
+
+* file plugin (writes to `~/`); from inside the `store/` dir, run:
+
+```shell
+go build -o streaming/abci/examples/file/file streaming/abci/examples/file/file.go
+```
+
+### Testing
+
+Export a plugin from one of the Go or Python examples.
+
+* stdout plugin
+
+```shell
+export COSMOS_SDK_ABCI="{path to}/cosmos-sdk/store/streaming/abci/examples/stdout/stdout"
+```
+
+* file plugin (writes to ~/)
+
+```shell
+export COSMOS_SDK_ABCI="{path to}/cosmos-sdk/store/streaming/abci/examples/file/file"
+```
+
+where `{path to}` is the parent path to the `cosmos-sdk` repo on you system.
+
+Test:
+
+```shell
+make test-sim-nondeterminism-streaming
+```
+
+The plugin system will look for the plugin binary in the `env` variable `COSMOS_SDK_{PLUGIN_NAME}` above
+and if it does not find it, it will error out. The plugin UPPERCASE name is that of the
+`streaming.abci.plugin` TOML configuration setting.
--- a/server/v2/streaming/streaming.go
+++ b/server/v2/streaming/streaming.go
@ -0,0 +1,80 @@
+package streaming
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"strings"
+
+	"github.com/hashicorp/go-hclog"
+	"github.com/hashicorp/go-plugin"
+)
+
+const (
+	pluginEnvKeyPrefix = "COSMOS_SDK"
+	defaultPlugin      = "grpc"
+)
+
+// HandshakeMap contains a map of each supported streaming's handshake config
+var HandshakeMap = map[string]plugin.HandshakeConfig{
+	defaultPlugin: Handshake,
+}
+
+// PluginMap contains a map of supported gRPC plugins
+var PluginMap = map[string]plugin.Plugin{
+	defaultPlugin: &ListenerGRPCPlugin{},
+}
+
+func GetPluginEnvKey(name string) string {
+	return fmt.Sprintf("%s_%s", pluginEnvKeyPrefix, strings.ToUpper(name))
+}
+
+func NewStreamingPlugin(name, logLevel string) (interface{}, error) {
+	logger := hclog.New(&hclog.LoggerOptions{
+		Output: hclog.DefaultOutput,
+		Level:  toHclogLevel(logLevel),
+		Name:   fmt.Sprintf("plugin.%s", name),
+	})
+
+	// We're a host. Start by launching the streaming process.
+	env := os.Getenv(GetPluginEnvKey(name))
+	client := plugin.NewClient(&plugin.ClientConfig{
+		HandshakeConfig: HandshakeMap[name],
+		Managed:         true,
+		Plugins:         PluginMap,
+		// For verifying the integrity of executables see SecureConfig documentation
+		// https://pkg.go.dev/github.com/hashicorp/go-plugin#SecureConfig
+		//#nosec G204 -- Required to load plugins
+		Cmd:    exec.Command("sh", "-c", env),
+		Logger: logger,
+		AllowedProtocols: []plugin.Protocol{
+			plugin.ProtocolNetRPC, plugin.ProtocolGRPC,
+		},
+	})
+
+	// Connect via RPC
+	rpcClient, err := client.Client()
+	if err != nil {
+		return nil, err
+	}
+
+	// Request streaming plugin
+	return rpcClient.Dispense(name)
+}
+
+func toHclogLevel(s string) hclog.Level {
+	switch s {
+	case "trace":
+		return hclog.Trace
+	case "debug":
+		return hclog.Debug
+	case "info":
+		return hclog.Info
+	case "warn":
+		return hclog.Warn
+	case "error":
+		return hclog.Error
+	default:
+		return hclog.DefaultLevel
+	}
+}
--- a/server/v2/streaming/streaming_test.go
+++ b/server/v2/streaming/streaming_test.go
@ -0,0 +1,147 @@
+package streaming
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"runtime"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+	"github.com/stretchr/testify/suite"
+
+	"cosmossdk.io/log"
+)
+
+type PluginTestSuite struct {
+	suite.Suite
+
+	loggerCtx MockContext
+
+	workDir string
+
+	deliverBlockrequest ListenDeliverBlockRequest
+	stateChangeRequest  ListenStateChangesRequest
+
+	changeSet []*StoreKVPair
+}
+
+func (s *PluginTestSuite) SetupTest() {
+	if runtime.GOOS != "linux" {
+		s.T().Skip("only run on linux")
+	}
+
+	path, err := os.Getwd()
+	if err != nil {
+		s.T().Fail()
+	}
+	s.workDir = path
+
+	pluginVersion := defaultPlugin
+	// to write data to files, replace stdout/stdout => file/file
+	pluginPath := fmt.Sprintf("%s/abci/examples/stdout/stdout", s.workDir)
+	if err := os.Setenv(GetPluginEnvKey(pluginVersion), pluginPath); err != nil {
+		s.T().Fail()
+	}
+
+	raw, err := NewStreamingPlugin(pluginVersion, "trace")
+	require.NoError(s.T(), err, "load", "streaming", "unexpected error")
+
+	abciListener, ok := raw.(Listener)
+	require.True(s.T(), ok, "should pass type check")
+
+	logger := log.NewNopLogger()
+	streamingService := Manager{
+		Listeners:     []Listener{abciListener},
+		StopNodeOnErr: true,
+	}
+	s.loggerCtx = NewMockContext(1, logger, streamingService)
+
+	// test abci message types
+
+	s.deliverBlockrequest = ListenDeliverBlockRequest{
+		BlockHeight: s.loggerCtx.BlockHeight(),
+		Txs:         [][]byte{{1, 2, 3, 4, 5, 6, 7, 8, 9}},
+		Events:      []*Event{},
+	}
+	s.stateChangeRequest = ListenStateChangesRequest{}
+
+	key := []byte("mockStore")
+	key = append(key, 1, 2, 3)
+	// test store kv pair types
+	for range [2000]int{} {
+		s.changeSet = append(s.changeSet, &StoreKVPair{
+			Key:   key,
+			Value: []byte{3, 2, 1},
+		})
+	}
+}
+
+func TestPluginTestSuite(t *testing.T) {
+	suite.Run(t, new(PluginTestSuite))
+}
+
+func (s *PluginTestSuite) TestABCIGRPCPlugin() {
+	s.T().Run("Should successfully load streaming", func(t *testing.T) {
+		abciListeners := s.loggerCtx.StreamingManager().Listeners
+		for _, abciListener := range abciListeners {
+			for i := range [50]int{} {
+
+				err := abciListener.ListenDeliverBlock(s.loggerCtx, s.deliverBlockrequest)
+				assert.NoError(t, err, "ListenEndBlock")
+
+				err = abciListener.ListenStateChanges(s.loggerCtx, s.changeSet)
+				assert.NoError(t, err, "ListenCommit")
+
+				s.updateHeight(int64(i + 1))
+			}
+		}
+	})
+}
+
+func (s *PluginTestSuite) updateHeight(n int64) {
+	s.loggerCtx = NewMockContext(n, s.loggerCtx.Logger(), s.loggerCtx.StreamingManager())
+}
+
+var (
+	_ context.Context = MockContext{}
+	_ Context         = MockContext{}
+)
+
+type MockContext struct {
+	baseCtx          context.Context
+	height           int64
+	logger           log.Logger
+	streamingManager Manager
+}
+
+func (m MockContext) BlockHeight() int64        { return m.height }
+func (m MockContext) Logger() log.Logger        { return m.logger }
+func (m MockContext) StreamingManager() Manager { return m.streamingManager }
+
+func NewMockContext(height int64, logger log.Logger, sm Manager) MockContext {
+	return MockContext{
+		baseCtx:          context.Background(),
+		height:           height,
+		logger:           logger,
+		streamingManager: sm,
+	}
+}
+
+func (m MockContext) Deadline() (deadline time.Time, ok bool) {
+	return m.baseCtx.Deadline()
+}
+
+func (m MockContext) Done() <-chan struct{} {
+	return m.baseCtx.Done()
+}
+
+func (m MockContext) Err() error {
+	return m.baseCtx.Err()
+}
+
+func (m MockContext) Value(key any) any {
+	return m.baseCtx.Value(key)
+}
--- a/server/v2/streaming/types.go
+++ b/server/v2/streaming/types.go
@ -0,0 +1,11 @@
+package streaming
+
+// Manager is the struct that maintains a list of ABCIListeners and configuration settings.
+type Manager struct {
+	// Listeners for hooking into the message processing of the server
+	// and exposing the requests and responses to external consumers
+	Listeners []Listener
+
+	// StopNodeOnErr halts the node when ABCI streaming service listening results in an error.
+	StopNodeOnErr bool
+}
--- a/server/v2/streaming/utils.go
+++ b/server/v2/streaming/utils.go
@ -0,0 +1,23 @@
+package streaming
+
+import "cosmossdk.io/core/event"
+
+func IntoStreamingEvents(events []event.Event) []*Event {
+	streamingEvents := make([]*Event, len(events))
+
+	for _, event := range events {
+		strEvent := &Event{
+			Type: event.Type,
+		}
+
+		for _, eventValue := range event.Attributes {
+			strEvent.Attributes = append(strEvent.Attributes, &EventAttribute{
+				Key:   eventValue.Key,
+				Value: eventValue.Value,
+			})
+		}
+		streamingEvents = append(streamingEvents, strEvent)
+	}
+
+	return streamingEvents
+}
--- a/server/v2/testdata/app.toml
+++ b/server/v2/testdata/app.toml
@ -0,0 +1,17 @@
+[grpc-server]
+# Enable defines if the gRPC server should be enabled.
+enable = false
+# Address defines the gRPC server address to bind to.
+address = 'localhost:9090'
+# MaxRecvMsgSize defines the max message size in bytes the server can receive.
+# The default value is 10MB.
+max-recv-msg-size = 10485760
+# MaxSendMsgSize defines the max message size in bytes the server can send.
+# The default value is math.MaxInt32.
+max-send-msg-size = 2147483647
+
+[mock-server-1]
+# Mock field
+mock_field = 'default'
+# Mock field two
+mock_field_two = 1
--- a/simapp/gomod2nix.toml
+++ b/simapp/gomod2nix.toml
@ -2,11 +2,11 @@ schema = 3

 [mod]
  [mod."buf.build/gen/go/cometbft/cometbft/protocolbuffers/go"]
-    version = "v1.34.0-20240312114316-c0d3497e35d6.1"
-    hash = "sha256-Uoo+Gfx/mnzKRoBvmTJC7oUKMrxOT20ibdY6ArGKHLQ="
+    version = "v1.34.1-20240312114316-c0d3497e35d6.1"
+    hash = "sha256-0zQ7x05+UOSAexuSQMFmt8kcY3023CBEOaulmRklnPA="
  [mod."buf.build/gen/go/cosmos/gogo-proto/protocolbuffers/go"]
-    version = "v1.34.0-20240130113600-88ef6483f90f.1"
-    hash = "sha256-EpsIiMf8GKK56FgjSS3tCZtVCz4apPcJiaqsbhtF3kM="
+    version = "v1.34.1-20240130113600-88ef6483f90f.1"
+    hash = "sha256-xCjFaSPtlyMmDhzBDAdgUStU8TYFOril/goGfGOGAWo="
  [mod."cloud.google.com/go"]
    version = "v0.112.2"
    hash = "sha256-Bk5MD40eefJlyUk96arLU/X1+EHItM7MjRPJtV0CU58="
@ -553,11 +553,11 @@ schema = 3
    version = "v0.0.0-20240415180920-8c6c420018be"
    hash = "sha256-0Bc66Utj1rydwYngQxTQoTyg1Td2D+nIxukc0zz7XFc="
  [mod."google.golang.org/genproto/googleapis/rpc"]
-    version = "v0.0.0-20240509183442-62759503f434"
-    hash = "sha256-w2SGX12NeDO33wjxEpHi+OMcpp9SioPtdBuZKUIun+U="
+    version = "v0.0.0-20240513163218-0867130af1f8"
+    hash = "sha256-c+VNAAU3HTu/ZGfpiPnjnzgszcPhU4JOhTTcIdo/PPI="
  [mod."google.golang.org/grpc"]
-    version = "v1.63.2"
-    hash = "sha256-RmtVjYLam97k7IHTHU7Gn16xNX+GvA9AiLKlQwOiZXU="
+    version = "v1.64.0"
+    hash = "sha256-04Noi8lrzr+4ac2BA7KNXUXN/xZL/A2SsEpC2Hern84="
  [mod."google.golang.org/protobuf"]
    version = "v1.34.1"
    hash = "sha256-qnHqY6KLZiZDbTVTN6uzF4jedxROYlPCYHoiv6XI0sc="