Merge branch 'master' of ssh://github.com/micro/services

2026-01-11 19:04:35 +00:00 · 2021-01-27 11:51:22 +00:00
parent 5ae9c4b1a6 54c5994faf
commit 1606b98695
30 changed files with 1855 additions and 82 deletions
--- a/chats/.gitignore
+++ b/chats/.gitignore
@@ -0,0 +1,2 @@
+
+chats
--- a/chats/Dockerfile
+++ b/chats/Dockerfile
@@ -0,0 +1,3 @@
+FROM alpine
+ADD chats /chats
+ENTRYPOINT [ "/chats" ]
--- a/chats/Makefile
+++ b/chats/Makefile
@@ -0,0 +1,22 @@
+
+GOPATH:=$(shell go env GOPATH)
+.PHONY: init
+init:
+	go get -u github.com/golang/protobuf/proto
+	go get -u github.com/golang/protobuf/protoc-gen-go
+	go get github.com/micro/micro/v3/cmd/protoc-gen-micro
+.PHONY: proto
+proto:
+	protoc --proto_path=. --micro_out=. --go_out=:. proto/chats.proto
+	
+.PHONY: build
+build:
+	go build -o chats *.go
+
+.PHONY: test
+test:
+	go test -v ./... -cover
+
+.PHONY: docker
+docker:
+	docker build . -t chats:latest
--- a/chats/README.md
+++ b/chats/README.md
@@ -0,0 +1,3 @@
+# Chats Service
+
+This is the Chats service
--- a/chats/generate.go
+++ b/chats/generate.go
@@ -0,0 +1,2 @@
+package main
+//go:generate make proto
--- a/chats/handler/chats.go
+++ b/chats/handler/chats.go
@@ -0,0 +1,61 @@
+package handler
+
+import (
+	"encoding/json"
+	"time"
+
+	pb "github.com/micro/services/chats/proto"
+
+	"github.com/micro/micro/v3/service/errors"
+	"google.golang.org/protobuf/types/known/timestamppb"
+	"gorm.io/gorm"
+)
+
+var (
+	ErrMissingID       = errors.BadRequest("MISSING_ID", "Missing ID")
+	ErrMissingAuthorID = errors.BadRequest("MISSING_AUTHOR_ID", "Missing Author ID")
+	ErrMissingText     = errors.BadRequest("MISSING_TEXT", "Missing text")
+	ErrMissingChatID   = errors.BadRequest("MISSING_CHAT_ID", "Missing Chat ID")
+	ErrMissingUserIDs  = errors.BadRequest("MISSING_USER_IDs", "Two or more user IDs are required")
+	ErrNotFound        = errors.NotFound("NOT_FOUND", "Chat not found")
+)
+
+type Chats struct {
+	DB   *gorm.DB
+	Time func() time.Time
+}
+
+type Chat struct {
+	ID        string
+	UserIDs   string `gorm:"uniqueIndex"` // sorted json array
+	CreatedAt time.Time
+}
+
+type Message struct {
+	ID       string
+	AuthorID string
+	ChatID   string
+	Text     string
+	SentAt   time.Time
+}
+
+func (m *Message) Serialize() *pb.Message {
+	return &pb.Message{
+		Id:       m.ID,
+		AuthorId: m.AuthorID,
+		ChatId:   m.ChatID,
+		Text:     m.Text,
+		SentAt:   timestamppb.New(m.SentAt),
+	}
+}
+
+func (c *Chat) Serialize() *pb.Chat {
+	var userIDs []string
+	json.Unmarshal([]byte(c.UserIDs), &userIDs)
+
+	return &pb.Chat{
+		Id:        c.ID,
+		UserIds:   userIDs,
+		CreatedAt: timestamppb.New(c.CreatedAt),
+	}
+}
--- a/chats/handler/chats_test.go
+++ b/chats/handler/chats_test.go
@@ -0,0 +1,83 @@
+package handler_test
+
+import (
+	"testing"
+	"time"
+
+	"github.com/micro/services/chats/handler"
+	pb "github.com/micro/services/chats/proto"
+	"github.com/stretchr/testify/assert"
+
+	"gorm.io/driver/postgres"
+	"gorm.io/gorm"
+)
+
+func testHandler(t *testing.T) *handler.Chats {
+	// connect to the database
+	db, err := gorm.Open(postgres.Open("postgresql://postgres@localhost:5432/chats?sslmode=disable"), &gorm.Config{})
+	if err != nil {
+		t.Fatalf("Error connecting to database: %v", err)
+	}
+
+	// migrate the database
+	if err := db.AutoMigrate(&handler.Chat{}, &handler.Message{}); err != nil {
+		t.Fatalf("Error migrating database: %v", err)
+	}
+
+	// clean any data from a previous run
+	if err := db.Exec("TRUNCATE TABLE chats, messages CASCADE").Error; err != nil {
+		t.Fatalf("Error cleaning database: %v", err)
+	}
+
+	return &handler.Chats{DB: db, Time: func() time.Time { return time.Unix(1611327673, 0) }}
+}
+
+func assertChatsMatch(t *testing.T, exp, act *pb.Chat) {
+	if act == nil {
+		t.Errorf("Chat not returned")
+		return
+	}
+
+	// adapt this check so we can reuse the func in testing create, where we don't know the exact id
+	// which will be generated
+	if len(exp.Id) > 0 {
+		assert.Equal(t, exp.Id, act.Id)
+	} else {
+		assert.NotEmpty(t, act.Id)
+	}
+
+	assert.Equal(t, exp.UserIds, act.UserIds)
+
+	if act.CreatedAt == nil {
+		t.Errorf("CreatedAt not set")
+		return
+	}
+
+	assert.True(t, exp.CreatedAt.AsTime().Equal(act.CreatedAt.AsTime()))
+}
+
+func assertMessagesMatch(t *testing.T, exp, act *pb.Message) {
+	if act == nil {
+		t.Errorf("Message not returned")
+		return
+	}
+
+	// adapt this check so we can reuse the func in testing create, where we don't know the exact id
+	// which will be generated
+	if len(exp.Id) > 0 {
+		assert.Equal(t, exp.Id, act.Id)
+	} else {
+		assert.NotEmpty(t, act.Id)
+	}
+
+	assert.Equal(t, exp.Text, act.Text)
+	assert.Equal(t, exp.AuthorId, act.AuthorId)
+	assert.Equal(t, exp.ChatId, act.ChatId)
+
+	if act.SentAt == nil {
+		t.Errorf("SentAt not set")
+		return
+	}
+
+	assert.True(t, exp.SentAt.AsTime().Equal(act.SentAt.AsTime()))
+}
--- a/chats/handler/create_chat.go
+++ b/chats/handler/create_chat.go
@@ -0,0 +1,57 @@
+package handler
+
+import (
+	"context"
+	"encoding/json"
+	"sort"
+	"strings"
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/micro/micro/v3/service/errors"
+	"github.com/micro/micro/v3/service/logger"
+	pb "github.com/micro/services/chats/proto"
+)
+
+// Create a chat between two or more users, if a chat already exists for these users, the existing
+// chat will be returned
+func (c *Chats) CreateChat(ctx context.Context, req *pb.CreateChatRequest, rsp *pb.CreateChatResponse) error {
+	// validate the request
+	if len(req.UserIds) < 2 {
+		return ErrMissingUserIDs
+	}
+
+	// sort the user ids and then marshal to json
+	sort.Strings(req.UserIds)
+	bytes, err := json.Marshal(req.UserIds)
+	if err != nil {
+		logger.Errorf("Error mashaling user ids: %v", err)
+		return errors.InternalServerError("ENCODING_ERROR", "Error encoding user ids")
+	}
+
+	// construct the chat
+	chat := Chat{
+		ID:        uuid.New().String(),
+		CreatedAt: time.Now(),
+		UserIDs:   string(bytes),
+	}
+
+	// write to the database, if we get a unique key error, the chat already exists
+	err = c.DB.Create(&chat).Error
+	if err == nil {
+		rsp.Chat = chat.Serialize()
+		return nil
+	}
+	if !strings.Contains(err.Error(), "idx_chats_user_ids") {
+		logger.Errorf("Error creating chat: %v", err)
+		return errors.InternalServerError("DATABASE_ERROR", "Error connecting to database")
+	}
+
+	var existing Chat
+	if err := c.DB.Where(&Chat{UserIDs: chat.UserIDs}).First(&existing).Error; err != nil {
+		logger.Errorf("Error reading chat: %v", err)
+		return errors.InternalServerError("DATABASE_ERROR", "Error connecting to database")
+	}
+	rsp.Chat = existing.Serialize()
+	return nil
+}
--- a/chats/handler/create_chat_test.go
+++ b/chats/handler/create_chat_test.go
@@ -0,0 +1,63 @@
+package handler_test
+
+import (
+	"context"
+	"testing"
+
+	"github.com/google/uuid"
+	"github.com/micro/services/chats/handler"
+	pb "github.com/micro/services/chats/proto"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestCreateChat(t *testing.T) {
+	userIDs := []string{uuid.New().String(), uuid.New().String()}
+
+	tt := []struct {
+		Name    string
+		UserIDs []string
+		Error   error
+	}{
+		{
+			Name:  "NoUserIDs",
+			Error: handler.ErrMissingUserIDs,
+		},
+		{
+			Name:    "OneUserID",
+			UserIDs: userIDs[1:],
+			Error:   handler.ErrMissingUserIDs,
+		},
+		{
+			Name:    "Valid",
+			UserIDs: userIDs,
+		},
+		{
+			Name:    "Repeat",
+			UserIDs: userIDs,
+		},
+	}
+
+	var chat *pb.Chat
+	h := testHandler(t)
+
+	for _, tc := range tt {
+		t.Run(tc.Name, func(t *testing.T) {
+			var rsp pb.CreateChatResponse
+			err := h.CreateChat(context.TODO(), &pb.CreateChatRequest{
+				UserIds: tc.UserIDs,
+			}, &rsp)
+
+			assert.Equal(t, tc.Error, err)
+			if tc.Error != nil {
+				return
+			}
+
+			assert.NotNil(t, rsp.Chat)
+			if chat == nil {
+				chat = rsp.Chat
+			} else {
+				assertChatsMatch(t, chat, rsp.Chat)
+			}
+		})
+	}
+}
--- a/chats/handler/create_message.go
+++ b/chats/handler/create_message.go
@@ -0,0 +1,53 @@
+package handler
+
+import (
+	"context"
+
+	"github.com/google/uuid"
+	"github.com/micro/micro/v3/service/errors"
+	"github.com/micro/micro/v3/service/logger"
+	pb "github.com/micro/services/chats/proto"
+	"gorm.io/gorm"
+)
+
+// Create a message within a chat
+func (c *Chats) CreateMessage(ctx context.Context, req *pb.CreateMessageRequest, rsp *pb.CreateMessageResponse) error {
+	// validate the request
+	if len(req.AuthorId) == 0 {
+		return ErrMissingAuthorID
+	}
+	if len(req.ChatId) == 0 {
+		return ErrMissingChatID
+	}
+	if len(req.Text) == 0 {
+		return ErrMissingText
+	}
+
+	return c.DB.Transaction(func(tx *gorm.DB) error {
+		// lookup the chat
+		var conv Chat
+		if err := tx.Where(&Chat{ID: req.ChatId}).First(&conv).Error; err == gorm.ErrRecordNotFound {
+			return ErrNotFound
+		} else if err != nil {
+			logger.Errorf("Error reading chat: %v", err)
+			return errors.InternalServerError("DATABASE_ERROR", "Error connecting to database")
+		}
+
+		// create the message
+		msg := &Message{
+			ID:       uuid.New().String(),
+			SentAt:   c.Time(),
+			Text:     req.Text,
+			AuthorID: req.AuthorId,
+			ChatID:   req.ChatId,
+		}
+		if err := tx.Create(msg).Error; err != nil {
+			logger.Errorf("Error creating message: %v", err)
+			return errors.InternalServerError("DATABASE_ERROR", "Error connecting to database")
+		}
+
+		// serialize the response
+		rsp.Message = msg.Serialize()
+		return nil
+	})
+}
--- a/chats/handler/create_message_test.go
+++ b/chats/handler/create_message_test.go
@@ -0,0 +1,89 @@
+package handler_test
+
+import (
+	"context"
+	"testing"
+
+	"github.com/micro/services/chats/handler"
+	pb "github.com/micro/services/chats/proto"
+	"google.golang.org/protobuf/types/known/timestamppb"
+
+	"github.com/google/uuid"
+	"github.com/stretchr/testify/assert"
+)
+
+func TestCreateMessage(t *testing.T) {
+	h := testHandler(t)
+
+	// seed some data
+	var cRsp pb.CreateChatResponse
+	err := h.CreateChat(context.TODO(), &pb.CreateChatRequest{
+		UserIds: []string{uuid.New().String(), uuid.New().String()},
+	}, &cRsp)
+	if err != nil {
+		t.Fatalf("Error creating chat: %v", err)
+		return
+	}
+
+	tt := []struct {
+		Name     string
+		AuthorID string
+		ChatID   string
+		Text     string
+		Error    error
+	}{
+		{
+			Name:     "MissingChatID",
+			Text:     "HelloWorld",
+			AuthorID: uuid.New().String(),
+			Error:    handler.ErrMissingChatID,
+		},
+		{
+			Name:   "MissingAuthorID",
+			ChatID: uuid.New().String(),
+			Text:   "HelloWorld",
+			Error:  handler.ErrMissingAuthorID,
+		},
+		{
+			Name:     "MissingText",
+			ChatID:   uuid.New().String(),
+			AuthorID: uuid.New().String(),
+			Error:    handler.ErrMissingText,
+		},
+		{
+			Name:     "ChatNotFound",
+			ChatID:   uuid.New().String(),
+			AuthorID: uuid.New().String(),
+			Text:     "HelloWorld",
+			Error:    handler.ErrNotFound,
+		},
+		{
+			Name:     "Valid",
+			ChatID:   cRsp.Chat.Id,
+			AuthorID: uuid.New().String(),
+			Text:     "HelloWorld",
+		},
+	}
+
+	for _, tc := range tt {
+		t.Run(tc.Name, func(t *testing.T) {
+			var rsp pb.CreateMessageResponse
+			err := h.CreateMessage(context.TODO(), &pb.CreateMessageRequest{
+				Text: tc.Text, ChatId: tc.ChatID, AuthorId: tc.AuthorID,
+			}, &rsp)
+
+			assert.Equal(t, tc.Error, err)
+			if tc.Error != nil {
+				assert.Nil(t, rsp.Message)
+				return
+			}
+
+			assertMessagesMatch(t, &pb.Message{
+				AuthorId: tc.AuthorID,
+				ChatId:   tc.ChatID,
+				SentAt:   timestamppb.New(h.Time()),
+				Text:     tc.Text,
+			}, rsp.Message)
+		})
+	}
+}
--- a/chats/handler/list_messages.go
+++ b/chats/handler/list_messages.go
@@ -0,0 +1,45 @@
+package handler
+
+import (
+	"context"
+
+	"github.com/micro/micro/v3/service/errors"
+	"github.com/micro/micro/v3/service/logger"
+	pb "github.com/micro/services/chats/proto"
+)
+
+const DefaultLimit = 25
+
+// List the messages within a chat in reverse chronological order, using sent_before to
+// offset as older messages need to be loaded
+func (c *Chats) ListMessages(ctx context.Context, req *pb.ListMessagesRequest, rsp *pb.ListMessagesResponse) error {
+	// validate the request
+	if len(req.ChatId) == 0 {
+		return ErrMissingChatID
+	}
+
+	// construct the query
+	q := c.DB.Where(&Message{ChatID: req.ChatId}).Order("sent_at DESC")
+	if req.SentBefore != nil {
+		q = q.Where("sent_at < ?", req.SentBefore.AsTime())
+	}
+	if req.Limit != nil {
+		q.Limit(int(req.Limit.Value))
+	} else {
+		q.Limit(DefaultLimit)
+	}
+
+	// execute the query
+	var msgs []Message
+	if err := q.Find(&msgs).Error; err != nil {
+		logger.Errorf("Error reading messages: %v", err)
+		return errors.InternalServerError("DATABASE_ERROR", "Error connecting to database")
+	}
+
+	// serialize the response
+	rsp.Messages = make([]*pb.Message, len(msgs))
+	for i, m := range msgs {
+		rsp.Messages[i] = m.Serialize()
+	}
+	return nil
+}
--- a/chats/handler/list_messages_test.go
+++ b/chats/handler/list_messages_test.go
@@ -0,0 +1,116 @@
+package handler_test
+
+import (
+	"context"
+	"sort"
+	"strconv"
+	"testing"
+	"time"
+
+	"github.com/google/uuid"
+	"github.com/micro/services/chats/handler"
+	pb "github.com/micro/services/chats/proto"
+	"github.com/stretchr/testify/assert"
+	"google.golang.org/protobuf/types/known/wrapperspb"
+)
+
+func TestListMessages(t *testing.T) {
+	h := testHandler(t)
+	h.Time = time.Now
+
+	// seed some data
+	var chatRsp pb.CreateChatResponse
+	err := h.CreateChat(context.TODO(), &pb.CreateChatRequest{
+		UserIds: []string{uuid.New().String(), uuid.New().String()},
+	}, &chatRsp)
+	assert.NoError(t, err)
+	if err != nil {
+		return
+	}
+
+	msgs := make([]*pb.Message, 50)
+	for i := 0; i < len(msgs); i++ {
+		var rsp pb.CreateMessageResponse
+		err := h.CreateMessage(context.TODO(), &pb.CreateMessageRequest{
+			ChatId:   chatRsp.Chat.Id,
+			AuthorId: uuid.New().String(),
+			Text:     strconv.Itoa(i),
+		}, &rsp)
+		assert.NoError(t, err)
+		msgs[i] = rsp.Message
+	}
+
+	t.Run("MissingChatID", func(t *testing.T) {
+		var rsp pb.ListMessagesResponse
+		err := h.ListMessages(context.TODO(), &pb.ListMessagesRequest{}, &rsp)
+		assert.Equal(t, handler.ErrMissingChatID, err)
+		assert.Nil(t, rsp.Messages)
+	})
+
+	t.Run("NoOffset", func(t *testing.T) {
+		var rsp pb.ListMessagesResponse
+		err := h.ListMessages(context.TODO(), &pb.ListMessagesRequest{
+			ChatId: chatRsp.Chat.Id,
+		}, &rsp)
+		assert.NoError(t, err)
+
+		if len(rsp.Messages) != handler.DefaultLimit {
+			t.Fatalf("Expected %v messages but got %v", handler.DefaultLimit, len(rsp.Messages))
+			return
+		}
+		expected := msgs[25:]
+		sortMessages(rsp.Messages)
+		for i, msg := range rsp.Messages {
+			assertMessagesMatch(t, expected[i], msg)
+		}
+	})
+
+	t.Run("LimitSet", func(t *testing.T) {
+		var rsp pb.ListMessagesResponse
+		err := h.ListMessages(context.TODO(), &pb.ListMessagesRequest{
+			ChatId: chatRsp.Chat.Id,
+			Limit:  &wrapperspb.Int32Value{Value: 10},
+		}, &rsp)
+		assert.NoError(t, err)
+
+		if len(rsp.Messages) != 10 {
+			t.Fatalf("Expected %v messages but got %v", 10, len(rsp.Messages))
+			return
+		}
+		expected := msgs[40:]
+		sortMessages(rsp.Messages)
+		for i, msg := range rsp.Messages {
+			assertMessagesMatch(t, expected[i], msg)
+		}
+	})
+
+	t.Run("OffsetAndLimit", func(t *testing.T) {
+		var rsp pb.ListMessagesResponse
+		err := h.ListMessages(context.TODO(), &pb.ListMessagesRequest{
+			ChatId:     chatRsp.Chat.Id,
+			Limit:      &wrapperspb.Int32Value{Value: 5},
+			SentBefore: msgs[20].SentAt,
+		}, &rsp)
+		assert.NoError(t, err)
+
+		if len(rsp.Messages) != 5 {
+			t.Fatalf("Expected %v messages but got %v", 5, len(rsp.Messages))
+			return
+		}
+		expected := msgs[15:20]
+		sortMessages(rsp.Messages)
+		for i, msg := range rsp.Messages {
+			assertMessagesMatch(t, expected[i], msg)
+		}
+	})
+}
+
+// sortMessages by the time they were sent
+func sortMessages(msgs []*pb.Message) {
+	sort.Slice(msgs, func(i, j int) bool {
+		if msgs[i].SentAt == nil || msgs[j].SentAt == nil {
+			return true
+		}
+		return msgs[i].SentAt.AsTime().Before(msgs[j].SentAt.AsTime())
+	})
+}
--- a/chats/main.go
+++ b/chats/main.go
@@ -0,0 +1,43 @@
+package main
+
+import (
+	"time"
+
+	"github.com/micro/services/chats/handler"
+	pb "github.com/micro/services/chats/proto"
+
+	"github.com/micro/micro/v3/service"
+	"github.com/micro/micro/v3/service/config"
+	"github.com/micro/micro/v3/service/logger"
+	"gorm.io/driver/postgres"
+	"gorm.io/gorm"
+)
+
+var dbAddress = "postgresql://postgres@localhost:5432/chats?sslmode=disable"
+
+func main() {
+	// Create service
+	srv := service.New(
+		service.Name("chats"),
+		service.Version("latest"),
+	)
+
+	// Connect to the database
+	cfg, err := config.Get("chats.database")
+	if err != nil {
+		logger.Fatalf("Error loading config: %v", err)
+	}
+	addr := cfg.String(dbAddress)
+	db, err := gorm.Open(postgres.Open(addr), &gorm.Config{})
+	if err != nil {
+		logger.Fatalf("Error connecting to database: %v", err)
+	}
+
+	// Register handler
+	pb.RegisterChatsHandler(srv.Server(), &handler.Chats{DB: db, Time: time.Now})
+
+	// Run service
+	if err := srv.Run(); err != nil {
+		logger.Fatal(err)
+	}
+}
--- a/chats/micro.mu
+++ b/chats/micro.mu
@@ -0,0 +1 @@
+service chats
--- a/chats/proto/chats.pb.go
+++ b/chats/proto/chats.pb.go
@@ -0,0 +1,727 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// versions:
+// 	protoc-gen-go v1.23.0
+// 	protoc        v3.13.0
+// source: proto/chats.proto
+
+package chats
+
+import (
+	proto "github.com/golang/protobuf/proto"
+	timestamp "github.com/golang/protobuf/ptypes/timestamp"
+	wrappers "github.com/golang/protobuf/ptypes/wrappers"
+	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
+	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
+	reflect "reflect"
+	sync "sync"
+)
+
+const (
+	// Verify that this generated code is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(20 - protoimpl.MinVersion)
+	// Verify that runtime/protoimpl is sufficiently up-to-date.
+	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
+)
+
+// This is a compile-time assertion that a sufficiently up-to-date version
+// of the legacy proto package is being used.
+const _ = proto.ProtoPackageIsVersion4
+
+type Chat struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Id        string               `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
+	UserIds   []string             `protobuf:"bytes,2,rep,name=user_ids,json=userIds,proto3" json:"user_ids,omitempty"`
+	CreatedAt *timestamp.Timestamp `protobuf:"bytes,3,opt,name=created_at,json=createdAt,proto3" json:"created_at,omitempty"`
+}
+
+func (x *Chat) Reset() {
+	*x = Chat{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proto_chats_proto_msgTypes[0]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Chat) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Chat) ProtoMessage() {}
+
+func (x *Chat) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_chats_proto_msgTypes[0]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Chat.ProtoReflect.Descriptor instead.
+func (*Chat) Descriptor() ([]byte, []int) {
+	return file_proto_chats_proto_rawDescGZIP(), []int{0}
+}
+
+func (x *Chat) GetId() string {
+	if x != nil {
+		return x.Id
+	}
+	return ""
+}
+
+func (x *Chat) GetUserIds() []string {
+	if x != nil {
+		return x.UserIds
+	}
+	return nil
+}
+
+func (x *Chat) GetCreatedAt() *timestamp.Timestamp {
+	if x != nil {
+		return x.CreatedAt
+	}
+	return nil
+}
+
+type Message struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Id       string               `protobuf:"bytes,1,opt,name=id,proto3" json:"id,omitempty"`
+	AuthorId string               `protobuf:"bytes,2,opt,name=author_id,json=authorId,proto3" json:"author_id,omitempty"`
+	ChatId   string               `protobuf:"bytes,3,opt,name=chat_id,json=chatId,proto3" json:"chat_id,omitempty"`
+	Text     string               `protobuf:"bytes,4,opt,name=text,proto3" json:"text,omitempty"`
+	SentAt   *timestamp.Timestamp `protobuf:"bytes,5,opt,name=sent_at,json=sentAt,proto3" json:"sent_at,omitempty"`
+}
+
+func (x *Message) Reset() {
+	*x = Message{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proto_chats_proto_msgTypes[1]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *Message) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*Message) ProtoMessage() {}
+
+func (x *Message) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_chats_proto_msgTypes[1]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use Message.ProtoReflect.Descriptor instead.
+func (*Message) Descriptor() ([]byte, []int) {
+	return file_proto_chats_proto_rawDescGZIP(), []int{1}
+}
+
+func (x *Message) GetId() string {
+	if x != nil {
+		return x.Id
+	}
+	return ""
+}
+
+func (x *Message) GetAuthorId() string {
+	if x != nil {
+		return x.AuthorId
+	}
+	return ""
+}
+
+func (x *Message) GetChatId() string {
+	if x != nil {
+		return x.ChatId
+	}
+	return ""
+}
+
+func (x *Message) GetText() string {
+	if x != nil {
+		return x.Text
+	}
+	return ""
+}
+
+func (x *Message) GetSentAt() *timestamp.Timestamp {
+	if x != nil {
+		return x.SentAt
+	}
+	return nil
+}
+
+type CreateChatRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	UserIds []string `protobuf:"bytes,1,rep,name=user_ids,json=userIds,proto3" json:"user_ids,omitempty"`
+}
+
+func (x *CreateChatRequest) Reset() {
+	*x = CreateChatRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proto_chats_proto_msgTypes[2]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *CreateChatRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*CreateChatRequest) ProtoMessage() {}
+
+func (x *CreateChatRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_chats_proto_msgTypes[2]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use CreateChatRequest.ProtoReflect.Descriptor instead.
+func (*CreateChatRequest) Descriptor() ([]byte, []int) {
+	return file_proto_chats_proto_rawDescGZIP(), []int{2}
+}
+
+func (x *CreateChatRequest) GetUserIds() []string {
+	if x != nil {
+		return x.UserIds
+	}
+	return nil
+}
+
+type CreateChatResponse struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Chat *Chat `protobuf:"bytes,1,opt,name=Chat,proto3" json:"Chat,omitempty"`
+}
+
+func (x *CreateChatResponse) Reset() {
+	*x = CreateChatResponse{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proto_chats_proto_msgTypes[3]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *CreateChatResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*CreateChatResponse) ProtoMessage() {}
+
+func (x *CreateChatResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_chats_proto_msgTypes[3]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use CreateChatResponse.ProtoReflect.Descriptor instead.
+func (*CreateChatResponse) Descriptor() ([]byte, []int) {
+	return file_proto_chats_proto_rawDescGZIP(), []int{3}
+}
+
+func (x *CreateChatResponse) GetChat() *Chat {
+	if x != nil {
+		return x.Chat
+	}
+	return nil
+}
+
+type CreateMessageRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	ChatId   string `protobuf:"bytes,1,opt,name=chat_id,json=chatId,proto3" json:"chat_id,omitempty"`
+	AuthorId string `protobuf:"bytes,2,opt,name=author_id,json=authorId,proto3" json:"author_id,omitempty"`
+	Text     string `protobuf:"bytes,3,opt,name=text,proto3" json:"text,omitempty"`
+}
+
+func (x *CreateMessageRequest) Reset() {
+	*x = CreateMessageRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proto_chats_proto_msgTypes[4]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *CreateMessageRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*CreateMessageRequest) ProtoMessage() {}
+
+func (x *CreateMessageRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_chats_proto_msgTypes[4]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use CreateMessageRequest.ProtoReflect.Descriptor instead.
+func (*CreateMessageRequest) Descriptor() ([]byte, []int) {
+	return file_proto_chats_proto_rawDescGZIP(), []int{4}
+}
+
+func (x *CreateMessageRequest) GetChatId() string {
+	if x != nil {
+		return x.ChatId
+	}
+	return ""
+}
+
+func (x *CreateMessageRequest) GetAuthorId() string {
+	if x != nil {
+		return x.AuthorId
+	}
+	return ""
+}
+
+func (x *CreateMessageRequest) GetText() string {
+	if x != nil {
+		return x.Text
+	}
+	return ""
+}
+
+type CreateMessageResponse struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Message *Message `protobuf:"bytes,1,opt,name=message,proto3" json:"message,omitempty"`
+}
+
+func (x *CreateMessageResponse) Reset() {
+	*x = CreateMessageResponse{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proto_chats_proto_msgTypes[5]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *CreateMessageResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*CreateMessageResponse) ProtoMessage() {}
+
+func (x *CreateMessageResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_chats_proto_msgTypes[5]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use CreateMessageResponse.ProtoReflect.Descriptor instead.
+func (*CreateMessageResponse) Descriptor() ([]byte, []int) {
+	return file_proto_chats_proto_rawDescGZIP(), []int{5}
+}
+
+func (x *CreateMessageResponse) GetMessage() *Message {
+	if x != nil {
+		return x.Message
+	}
+	return nil
+}
+
+type ListMessagesRequest struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	ChatId     string               `protobuf:"bytes,1,opt,name=chat_id,json=chatId,proto3" json:"chat_id,omitempty"`
+	SentBefore *timestamp.Timestamp `protobuf:"bytes,2,opt,name=sent_before,json=sentBefore,proto3" json:"sent_before,omitempty"`
+	Limit      *wrappers.Int32Value `protobuf:"bytes,3,opt,name=limit,proto3" json:"limit,omitempty"`
+}
+
+func (x *ListMessagesRequest) Reset() {
+	*x = ListMessagesRequest{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proto_chats_proto_msgTypes[6]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ListMessagesRequest) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ListMessagesRequest) ProtoMessage() {}
+
+func (x *ListMessagesRequest) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_chats_proto_msgTypes[6]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ListMessagesRequest.ProtoReflect.Descriptor instead.
+func (*ListMessagesRequest) Descriptor() ([]byte, []int) {
+	return file_proto_chats_proto_rawDescGZIP(), []int{6}
+}
+
+func (x *ListMessagesRequest) GetChatId() string {
+	if x != nil {
+		return x.ChatId
+	}
+	return ""
+}
+
+func (x *ListMessagesRequest) GetSentBefore() *timestamp.Timestamp {
+	if x != nil {
+		return x.SentBefore
+	}
+	return nil
+}
+
+func (x *ListMessagesRequest) GetLimit() *wrappers.Int32Value {
+	if x != nil {
+		return x.Limit
+	}
+	return nil
+}
+
+type ListMessagesResponse struct {
+	state         protoimpl.MessageState
+	sizeCache     protoimpl.SizeCache
+	unknownFields protoimpl.UnknownFields
+
+	Messages []*Message `protobuf:"bytes,1,rep,name=messages,proto3" json:"messages,omitempty"`
+}
+
+func (x *ListMessagesResponse) Reset() {
+	*x = ListMessagesResponse{}
+	if protoimpl.UnsafeEnabled {
+		mi := &file_proto_chats_proto_msgTypes[7]
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		ms.StoreMessageInfo(mi)
+	}
+}
+
+func (x *ListMessagesResponse) String() string {
+	return protoimpl.X.MessageStringOf(x)
+}
+
+func (*ListMessagesResponse) ProtoMessage() {}
+
+func (x *ListMessagesResponse) ProtoReflect() protoreflect.Message {
+	mi := &file_proto_chats_proto_msgTypes[7]
+	if protoimpl.UnsafeEnabled && x != nil {
+		ms := protoimpl.X.MessageStateOf(protoimpl.Pointer(x))
+		if ms.LoadMessageInfo() == nil {
+			ms.StoreMessageInfo(mi)
+		}
+		return ms
+	}
+	return mi.MessageOf(x)
+}
+
+// Deprecated: Use ListMessagesResponse.ProtoReflect.Descriptor instead.
+func (*ListMessagesResponse) Descriptor() ([]byte, []int) {
+	return file_proto_chats_proto_rawDescGZIP(), []int{7}
+}
+
+func (x *ListMessagesResponse) GetMessages() []*Message {
+	if x != nil {
+		return x.Messages
+	}
+	return nil
+}
+
+var File_proto_chats_proto protoreflect.FileDescriptor
+
+var file_proto_chats_proto_rawDesc = []byte{
+	0x0a, 0x11, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2f, 0x63, 0x68, 0x61, 0x74, 0x73, 0x2e, 0x70, 0x72,
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+	0x74, 0x73, 0x2e, 0x4c, 0x69, 0x73, 0x74, 0x4d, 0x65, 0x73, 0x73, 0x61, 0x67, 0x65, 0x73, 0x52,
+	0x65, 0x73, 0x70, 0x6f, 0x6e, 0x73, 0x65, 0x42, 0x0d, 0x5a, 0x0b, 0x70, 0x72, 0x6f, 0x74, 0x6f,
+	0x3b, 0x63, 0x68, 0x61, 0x74, 0x73, 0x62, 0x06, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
+}
+
+var (
+	file_proto_chats_proto_rawDescOnce sync.Once
+	file_proto_chats_proto_rawDescData = file_proto_chats_proto_rawDesc
+)
+
+func file_proto_chats_proto_rawDescGZIP() []byte {
+	file_proto_chats_proto_rawDescOnce.Do(func() {
+		file_proto_chats_proto_rawDescData = protoimpl.X.CompressGZIP(file_proto_chats_proto_rawDescData)
+	})
+	return file_proto_chats_proto_rawDescData
+}
+
+var file_proto_chats_proto_msgTypes = make([]protoimpl.MessageInfo, 8)
+var file_proto_chats_proto_goTypes = []interface{}{
+	(*Chat)(nil),                  // 0: chats.Chat
+	(*Message)(nil),               // 1: chats.Message
+	(*CreateChatRequest)(nil),     // 2: chats.CreateChatRequest
+	(*CreateChatResponse)(nil),    // 3: chats.CreateChatResponse
+	(*CreateMessageRequest)(nil),  // 4: chats.CreateMessageRequest
+	(*CreateMessageResponse)(nil), // 5: chats.CreateMessageResponse
+	(*ListMessagesRequest)(nil),   // 6: chats.ListMessagesRequest
+	(*ListMessagesResponse)(nil),  // 7: chats.ListMessagesResponse
+	(*timestamp.Timestamp)(nil),   // 8: google.protobuf.Timestamp
+	(*wrappers.Int32Value)(nil),   // 9: google.protobuf.Int32Value
+}
+var file_proto_chats_proto_depIdxs = []int32{
+	8,  // 0: chats.Chat.created_at:type_name -> google.protobuf.Timestamp
+	8,  // 1: chats.Message.sent_at:type_name -> google.protobuf.Timestamp
+	0,  // 2: chats.CreateChatResponse.Chat:type_name -> chats.Chat
+	1,  // 3: chats.CreateMessageResponse.message:type_name -> chats.Message
+	8,  // 4: chats.ListMessagesRequest.sent_before:type_name -> google.protobuf.Timestamp
+	9,  // 5: chats.ListMessagesRequest.limit:type_name -> google.protobuf.Int32Value
+	1,  // 6: chats.ListMessagesResponse.messages:type_name -> chats.Message
+	2,  // 7: chats.Chats.CreateChat:input_type -> chats.CreateChatRequest
+	4,  // 8: chats.Chats.CreateMessage:input_type -> chats.CreateMessageRequest
+	6,  // 9: chats.Chats.ListMessages:input_type -> chats.ListMessagesRequest
+	3,  // 10: chats.Chats.CreateChat:output_type -> chats.CreateChatResponse
+	5,  // 11: chats.Chats.CreateMessage:output_type -> chats.CreateMessageResponse
+	7,  // 12: chats.Chats.ListMessages:output_type -> chats.ListMessagesResponse
+	10, // [10:13] is the sub-list for method output_type
+	7,  // [7:10] is the sub-list for method input_type
+	7,  // [7:7] is the sub-list for extension type_name
+	7,  // [7:7] is the sub-list for extension extendee
+	0,  // [0:7] is the sub-list for field type_name
+}
+
+func init() { file_proto_chats_proto_init() }
+func file_proto_chats_proto_init() {
+	if File_proto_chats_proto != nil {
+		return
+	}
+	if !protoimpl.UnsafeEnabled {
+		file_proto_chats_proto_msgTypes[0].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Chat); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_proto_chats_proto_msgTypes[1].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*Message); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_proto_chats_proto_msgTypes[2].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*CreateChatRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_proto_chats_proto_msgTypes[3].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*CreateChatResponse); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_proto_chats_proto_msgTypes[4].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*CreateMessageRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_proto_chats_proto_msgTypes[5].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*CreateMessageResponse); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_proto_chats_proto_msgTypes[6].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ListMessagesRequest); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+		file_proto_chats_proto_msgTypes[7].Exporter = func(v interface{}, i int) interface{} {
+			switch v := v.(*ListMessagesResponse); i {
+			case 0:
+				return &v.state
+			case 1:
+				return &v.sizeCache
+			case 2:
+				return &v.unknownFields
+			default:
+				return nil
+			}
+		}
+	}
+	type x struct{}
+	out := protoimpl.TypeBuilder{
+		File: protoimpl.DescBuilder{
+			GoPackagePath: reflect.TypeOf(x{}).PkgPath(),
+			RawDescriptor: file_proto_chats_proto_rawDesc,
+			NumEnums:      0,
+			NumMessages:   8,
+			NumExtensions: 0,
+			NumServices:   1,
+		},
+		GoTypes:           file_proto_chats_proto_goTypes,
+		DependencyIndexes: file_proto_chats_proto_depIdxs,
+		MessageInfos:      file_proto_chats_proto_msgTypes,
+	}.Build()
+	File_proto_chats_proto = out.File
+	file_proto_chats_proto_rawDesc = nil
+	file_proto_chats_proto_goTypes = nil
+	file_proto_chats_proto_depIdxs = nil
+}
--- a/chats/proto/chats.pb.micro.go
+++ b/chats/proto/chats.pb.micro.go
@@ -0,0 +1,139 @@
+// Code generated by protoc-gen-micro. DO NOT EDIT.
+// source: proto/chats.proto
+
+package chats
+
+import (
+	fmt "fmt"
+	proto "github.com/golang/protobuf/proto"
+	_ "github.com/golang/protobuf/ptypes/timestamp"
+	_ "github.com/golang/protobuf/ptypes/wrappers"
+	math "math"
+)
+
+import (
+	context "context"
+	api "github.com/micro/micro/v3/service/api"
+	client "github.com/micro/micro/v3/service/client"
+	server "github.com/micro/micro/v3/service/server"
+)
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ = proto.Marshal
+var _ = fmt.Errorf
+var _ = math.Inf
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the proto package it is being compiled against.
+// A compilation error at this line likely means your copy of the
+// proto package needs to be updated.
+const _ = proto.ProtoPackageIsVersion3 // please upgrade the proto package
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ api.Endpoint
+var _ context.Context
+var _ client.Option
+var _ server.Option
+
+// Api Endpoints for Chats service
+
+func NewChatsEndpoints() []*api.Endpoint {
+	return []*api.Endpoint{}
+}
+
+// Client API for Chats service
+
+type ChatsService interface {
+	// Create a chat between two or more users, if a chat already exists for these users, the existing
+	// chat will be returned
+	CreateChat(ctx context.Context, in *CreateChatRequest, opts ...client.CallOption) (*CreateChatResponse, error)
+	// Create a message within a chat
+	CreateMessage(ctx context.Context, in *CreateMessageRequest, opts ...client.CallOption) (*CreateMessageResponse, error)
+	// List the messages within a chat in reverse chronological order, using sent_before to
+	// offset as older messages need to be loaded
+	ListMessages(ctx context.Context, in *ListMessagesRequest, opts ...client.CallOption) (*ListMessagesResponse, error)
+}
+
+type chatsService struct {
+	c    client.Client
+	name string
+}
+
+func NewChatsService(name string, c client.Client) ChatsService {
+	return &chatsService{
+		c:    c,
+		name: name,
+	}
+}
+
+func (c *chatsService) CreateChat(ctx context.Context, in *CreateChatRequest, opts ...client.CallOption) (*CreateChatResponse, error) {
+	req := c.c.NewRequest(c.name, "Chats.CreateChat", in)
+	out := new(CreateChatResponse)
+	err := c.c.Call(ctx, req, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *chatsService) CreateMessage(ctx context.Context, in *CreateMessageRequest, opts ...client.CallOption) (*CreateMessageResponse, error) {
+	req := c.c.NewRequest(c.name, "Chats.CreateMessage", in)
+	out := new(CreateMessageResponse)
+	err := c.c.Call(ctx, req, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *chatsService) ListMessages(ctx context.Context, in *ListMessagesRequest, opts ...client.CallOption) (*ListMessagesResponse, error) {
+	req := c.c.NewRequest(c.name, "Chats.ListMessages", in)
+	out := new(ListMessagesResponse)
+	err := c.c.Call(ctx, req, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// Server API for Chats service
+
+type ChatsHandler interface {
+	// Create a chat between two or more users, if a chat already exists for these users, the existing
+	// chat will be returned
+	CreateChat(context.Context, *CreateChatRequest, *CreateChatResponse) error
+	// Create a message within a chat
+	CreateMessage(context.Context, *CreateMessageRequest, *CreateMessageResponse) error
+	// List the messages within a chat in reverse chronological order, using sent_before to
+	// offset as older messages need to be loaded
+	ListMessages(context.Context, *ListMessagesRequest, *ListMessagesResponse) error
+}
+
+func RegisterChatsHandler(s server.Server, hdlr ChatsHandler, opts ...server.HandlerOption) error {
+	type chats interface {
+		CreateChat(ctx context.Context, in *CreateChatRequest, out *CreateChatResponse) error
+		CreateMessage(ctx context.Context, in *CreateMessageRequest, out *CreateMessageResponse) error
+		ListMessages(ctx context.Context, in *ListMessagesRequest, out *ListMessagesResponse) error
+	}
+	type Chats struct {
+		chats
+	}
+	h := &chatsHandler{hdlr}
+	return s.Handle(s.NewHandler(&Chats{h}, opts...))
+}
+
+type chatsHandler struct {
+	ChatsHandler
+}
+
+func (h *chatsHandler) CreateChat(ctx context.Context, in *CreateChatRequest, out *CreateChatResponse) error {
+	return h.ChatsHandler.CreateChat(ctx, in, out)
+}
+
+func (h *chatsHandler) CreateMessage(ctx context.Context, in *CreateMessageRequest, out *CreateMessageResponse) error {
+	return h.ChatsHandler.CreateMessage(ctx, in, out)
+}
+
+func (h *chatsHandler) ListMessages(ctx context.Context, in *ListMessagesRequest, out *ListMessagesResponse) error {
+	return h.ChatsHandler.ListMessages(ctx, in, out)
+}
--- a/chats/proto/chats.proto
+++ b/chats/proto/chats.proto
@@ -0,0 +1,59 @@
+syntax = "proto3";
+
+package chats;
+option go_package = "proto;chats";
+import "google/protobuf/timestamp.proto";
+import "google/protobuf/wrappers.proto";
+
+service Chats {
+	// Create a chat between two or more users, if a chat already exists for these users, the existing
+	// chat will be returned
+	rpc CreateChat(CreateChatRequest) returns (CreateChatResponse);
+	// Create a message within a chat
+	rpc CreateMessage(CreateMessageRequest) returns (CreateMessageResponse);
+	// List the messages within a chat in reverse chronological order, using sent_before to
+	// offset as older messages need to be loaded
+	rpc ListMessages(ListMessagesRequest) returns (ListMessagesResponse);
+}
+
+message Chat {
+	string id = 1;
+	repeated string user_ids = 2;
+	google.protobuf.Timestamp created_at = 3;
+}
+
+message Message {
+	string id = 1;
+	string author_id = 2;
+	string chat_id = 3;
+	string text = 4;
+	google.protobuf.Timestamp sent_at = 5;
+}
+
+message CreateChatRequest {
+	repeated string user_ids = 1;
+}
+
+message CreateChatResponse {
+	Chat Chat = 1;
+}
+
+message CreateMessageRequest {
+	string chat_id = 1;
+	string author_id = 2;
+	string text = 3;
+}
+
+message CreateMessageResponse {
+	Message message = 1;
+}
+
+message ListMessagesRequest {
+	string chat_id = 1;
+	google.protobuf.Timestamp sent_before = 2;
+	google.protobuf.Int32Value limit = 3;
+}
+
+message ListMessagesResponse {
+	repeated Message messages = 1;
+}
--- a/go.sum
+++ b/go.sum
@@ -32,6 +32,7 @@ cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9
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 dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
 github.com/Azure/azure-sdk-for-go v32.4.0+incompatible/go.mod h1:9XXNKU+eRnpl9moKnB4QOLf1HestfXbmab5FXxiDBjc=
+github.com/Azure/go-ansiterm v0.0.0-20170929234023-d6e3b3328b78/go.mod h1:LmzpDX56iTiv29bbRTIsUNlaFfuhWRQBWjQdVyAevI8=
 github.com/Azure/go-autorest/autorest v0.1.0/go.mod h1:AKyIcETwSUFxIcs/Wnq/C+kwCtlEYGUVd7FPNb2slmg=
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 github.com/Azure/go-autorest/autorest/adal v0.1.0/go.mod h1:MeS4XhScH55IST095THyTxElntu7WqB7pNbZo8Q5G3E=
@@ -46,35 +47,49 @@ github.com/Azure/go-autorest/logger v0.1.0/go.mod h1:oExouG+K6PryycPJfVSxi/koC6L
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+github.com/Microsoft/go-winio v0.4.15-0.20190919025122-fc70bd9a86b5/go.mod h1:tTuCMEN+UleMWgg9dVx4Hu52b1bJo+59jBh3ajtinzw=
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@@ -149,6 +199,7 @@ github.com/golang/mock v1.4.1/go.mod h1:UOMv5ysSaYNkG+OFQykRIcU/QvvxJf3p21QfJ2Bt
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@@ -200,26 +251,36 @@ github.com/gorilla/context v1.1.1/go.mod h1:kBGZzfjB9CEq2AlWe17Uuf7NDRt0dE0s8S51
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@@ -276,15 +337,19 @@ github.com/jackc/puddle v0.0.0-20190608224051-11cab39313c9/go.mod h1:m4B5Dj62Y0f
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@@ -292,7 +357,10 @@ github.com/jtolds/gls v4.20.0+incompatible/go.mod h1:QJZ7F/aHp+rZTRtaJ1ow/lLfFfV
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@@ -309,6 +377,8 @@ github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
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@@ -316,6 +386,12 @@ github.com/lib/pq v1.3.0 h1:/qkRGz8zljWiDcFvgpwUpwIAPu3r07TDvs3Rws+o/pU=
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@@ -331,6 +407,9 @@ github.com/mattn/go-runewidth v0.0.6/go.mod h1:H031xJmbD/WCDINGzjvQ9THkh0rPKHF+m
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@@ -343,6 +422,7 @@ github.com/micro/micro/v3 v3.0.5-0.20210127104758-0b759ad942a4/go.mod h1:+WoC+lH
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@@ -351,17 +431,27 @@ github.com/minio/minio-go/v7 v7.0.5/go.mod h1:TA0CQCjJZHM5SJj9IjqR0NmpmQJ6bCbXif
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@@ -377,6 +467,14 @@ github.com/onsi/gomega v1.4.2/go.mod h1:ex+gbHU/CVuBBDIJjb2X0qEXbFg53c61hWP/1Cpa
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@@ -384,6 +482,7 @@ github.com/oxtoacart/bpool v0.0.0-20190530202638-03653db5a59c h1:rp5dCmg/yLR3mgF
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@@ -406,6 +505,7 @@ github.com/prometheus/procfs v0.0.0-20181005140218-185b4288413d/go.mod h1:c3At6R
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@@ -424,6 +524,7 @@ github.com/russross/blackfriday/v2 v2.0.1/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQD
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@@ -437,6 +538,8 @@ github.com/sirupsen/logrus v1.4.2/go.mod h1:tLMulIdttU9McNUspp0xgXVQah82FyeX6Mwd
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@@ -449,15 +552,19 @@ github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81P
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@@ -465,14 +572,18 @@ github.com/urfave/cli/v2 v2.2.0 h1:JTTnM6wKzdA0Jqodd966MVj4vWbbquZykeX1sKbe2C4=
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@@ -485,24 +596,38 @@ go.opencensus.io v0.22.4 h1:LYy1Hy3MJdrCdMwwzxA/dRok4ejH+RwNGbuoD9fCjto=
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@@ -548,6 +673,7 @@ golang.org/x/net v0.0.0-20181220203305-927f97764cc3/go.mod h1:mL1N/T3taQHkDXs73r
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@@ -560,7 +686,9 @@ golang.org/x/net v0.0.0-20190724013045-ca1201d0de80/go.mod h1:z5CRVTTTmAJ677TzLL
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@@ -601,24 +729,33 @@ golang.org/x/sys v0.0.0-20180909124046-d0be0721c37e/go.mod h1:STP8DvDyc/dI5b8T5h
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@@ -651,6 +788,7 @@ golang.org/x/time v0.0.0-20190921001708-c4c64cad1fd0/go.mod h1:tRJNPiyCQ0inRvYxb
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@@ -664,8 +802,10 @@ golang.org/x/tools v0.0.0-20190524140312-2c0ae7006135/go.mod h1:RgjU9mgBXZiqYHBn
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@@ -729,6 +869,7 @@ google.golang.org/appengine v1.6.5/go.mod h1:8WjMMxjGQR8xUklV/ARdw2HLXBOI7O7uCID
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@@ -783,6 +924,8 @@ gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f/go.mod h1:Co6ibVJAznAaIkqp8
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@@ -793,8 +936,13 @@ gopkg.in/resty.v1 v1.9.1/go.mod h1:vo52Hzryw9PnPHcJfPsBiFW62XhNx5OczbV9y+IMpgc=
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+gopkg.in/src-d/go-git-fixtures.v3 v3.5.0/go.mod h1:dLBcvytrw/TYZsNTWCnkNF2DSIlzWYqTe3rJR56Ac7g=
+gopkg.in/src-d/go-git.v4 v4.13.1/go.mod h1:nx5NYcxdKxq5fpltdHnPa2Exj4Sx0EclMWZQbYDu2z8=
+gopkg.in/telegram-bot-api.v4 v4.6.4/go.mod h1:5DpGO5dbumb40px+dXcwCpcjmeHNYLpk0bp3XRNvWDM=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7 h1:uRGJdciOHaEIrze2W8Q3AKkepLTh2hOroT7a+7czfdQ=
 gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
+gopkg.in/warnings.v0 v0.1.2/go.mod h1:jksf8JmL6Qr/oQM2OXTHunEvvTAsrWBLb6OOjuVWRNI=
 gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74=
 gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
@@ -810,6 +958,7 @@ gorm.io/driver/postgres v1.0.6/go.mod h1:r0nvX27yHDNbVeXMM9Y+9i5xSePcT18RfH8clP6
 gorm.io/gorm v1.20.8/go.mod h1:0HFTzE/SqkGTzK6TlDPPQbAYCluiVvhzoA1+aVyzenw=
 gorm.io/gorm v1.20.9 h1:M3aIZKXAC1PtPVu9t3WGwkBTE1le5c2telz3I/qjRNg=
 gorm.io/gorm v1.20.9/go.mod h1:0HFTzE/SqkGTzK6TlDPPQbAYCluiVvhzoA1+aVyzenw=
+gotest.tools v2.2.0+incompatible/go.mod h1:DsYFclhRJ6vuDpmuTbkuFWG+y2sxOXAzmJt81HFBacw=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190106161140-3f1c8253044a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
 honnef.co/go/tools v0.0.0-20190418001031-e561f6794a2a/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=
@@ -817,6 +966,8 @@ honnef.co/go/tools v0.0.0-20190523083050-ea95bdfd59fc/go.mod h1:rf3lG4BRIbNafJWh
 honnef.co/go/tools v0.0.1-2019.2.3/go.mod h1:a3bituU0lyd329TUQxRnasdCoJDkEUEAqEt0JzvZhAg=
 honnef.co/go/tools v0.0.1-2020.1.3/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
 honnef.co/go/tools v0.0.1-2020.1.4/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
+k8s.io/kubernetes v1.13.0/go.mod h1:ocZa8+6APFNC2tX1DZASIbocyYT5jHzqFVsY5aoB7Jk=
 rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
 rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
 rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=
+sigs.k8s.io/yaml v1.1.0/go.mod h1:UJmg0vDUVViEyp3mgSv9WPwZCDxu4rQW1olrI1uml+o=
--- a/streams/handler/create_message.go
+++ b/streams/handler/create_message.go
@@ -26,7 +26,7 @@ func (s *Streams) CreateMessage(ctx context.Context, req *pb.CreateMessageReques
 	return s.DB.Transaction(func(tx *gorm.DB) error {
 		// lookup the conversation
 		var conv Conversation
-		if err := s.DB.Where(&Conversation{ID: req.ConversationId}).First(&conv).Error; err == gorm.ErrRecordNotFound {
+		if err := tx.Where(&Conversation{ID: req.ConversationId}).First(&conv).Error; err == gorm.ErrRecordNotFound {
 			return ErrNotFound
 		} else if err != nil {
 			logger.Errorf("Error reading conversation: %v", err)
@@ -41,7 +41,7 @@ func (s *Streams) CreateMessage(ctx context.Context, req *pb.CreateMessageReques
 			AuthorID:       req.AuthorId,
 			ConversationID: req.ConversationId,
 		}
-		if err := s.DB.Create(msg).Error; err != nil {
+		if err := tx.Create(msg).Error; err != nil {
 			logger.Errorf("Error creating message: %v", err)
 			return errors.InternalServerError("DATABASE_ERROR", "Error connecting to database")
 		}
--- a/streams/main.go
+++ b/streams/main.go
@@ -1,13 +1,20 @@
 package main

 import (
+	"time"
+
 	"github.com/micro/services/streams/handler"
 	pb "github.com/micro/services/streams/proto"

 	"github.com/micro/micro/v3/service"
+	"github.com/micro/micro/v3/service/config"
 	"github.com/micro/micro/v3/service/logger"
+	"gorm.io/driver/postgres"
+	"gorm.io/gorm"
 )

+var dbAddress = "postgresql://postgres@localhost:5432/streams?sslmode=disable"
+
 func main() {
 	// Create service
 	srv := service.New(
@@ -15,8 +22,19 @@ func main() {
 		service.Version("latest"),
 	)

+	// Connect to the database
+	cfg, err := config.Get("streams.database")
+	if err != nil {
+		logger.Fatalf("Error loading config: %v", err)
+	}
+	addr := cfg.String(dbAddress)
+	db, err := gorm.Open(postgres.Open(addr), &gorm.Config{})
+	if err != nil {
+		logger.Fatalf("Error connecting to database: %v", err)
+	}
+
 	// Register handler
-	pb.RegisterStreamsHandler(srv.Server(), new(handler.Streams))
+	pb.RegisterStreamsHandler(srv.Server(), &handler.Streams{DB: db, Time: time.Now})

 	// Run service
 	if err := srv.Run(); err != nil {
--- a/test/chat/Makefile
+++ b/test/chat/Makefile
--- a/test/chat/README.md
+++ b/test/chat/README.md
--- a/test/chat/client/main.go
+++ b/test/chat/client/main.go
--- a/test/chat/handler/handler.go
+++ b/test/chat/handler/handler.go
@@ -4,6 +4,7 @@ import (
 	"context"
 	"sort"
 	"strings"
+	"time"

 	"github.com/google/uuid"
 	"github.com/micro/micro/v3/service/context/metadata"
@@ -11,6 +12,7 @@ import (
 	"github.com/micro/micro/v3/service/events"
 	"github.com/micro/micro/v3/service/logger"
 	"github.com/micro/micro/v3/service/store"
+	"google.golang.org/protobuf/types/known/timestamppb"

 	// it's standard to import the services own proto under the alias pb
 	pb "github.com/micro/services/chat/proto"
@@ -54,7 +56,7 @@ func (c *Chat) New(ctx context.Context, req *pb.NewRequest, rsp *pb.NewResponse)
 	sort.Strings(sortedIDs)

 	// key to lookup the chat in the store using, e.g. "chat/usera-userb-userc"
-	key := chatStoreKeyPrefix + strings.Join(sortedIDs, "-")
+	key := chatStoreKeyPrefix + strings.Join(sortedIDs, "_")

 	// read from the store to check if a chat with these users already exists
 	recs, err := store.Read(key)
@@ -76,9 +78,12 @@ func (c *Chat) New(ctx context.Context, req *pb.NewRequest, rsp *pb.NewResponse)
 	// no chat id was returned so we'll generate one, write it to the store and then return it to the
 	// client
 	chatID := uuid.New().String()
-	record := store.Record{Key: chatStoreKeyPrefix + chatID, Value: []byte(chatID)}
-	if err := store.Write(&record); err != nil {
-		logger.Errorf("Error writing to the store. Key: %v. Error: %v", record.Key, err)
+	if err := store.Write(&store.Record{Key: key, Value: []byte(chatID)}); err != nil {
+		logger.Errorf("Error writing to the store. Key: %v. Error: %v", key, err)
+		return errors.InternalServerError("chat.New.Unknown", "Error writing to the store")
+	}
+	if err := store.Write(&store.Record{Key: chatStoreKeyPrefix + chatID}); err != nil {
+		logger.Errorf("Error writing to the store. Key: %v. Error: %v", chatStoreKeyPrefix+chatID, err)
 		return errors.InternalServerError("chat.New.Unknown", "Error writing to the store")
 	}

@@ -153,6 +158,7 @@ func (c *Chat) Send(ctx context.Context, req *pb.SendRequest, rsp *pb.SendRespon
 		UserId:   req.UserId,
 		Subject:  req.Subject,
 		Text:     req.Text,
+		SentAt:   timestamppb.New(time.Now()),
 	}

 	// default the client id if not provided
@@ -161,7 +167,13 @@ func (c *Chat) Send(ctx context.Context, req *pb.SendRequest, rsp *pb.SendRespon
 	}

 	// create the message
-	return c.createMessage(msg)
+	if err := c.createMessage(msg); err != nil {
+		return err
+	}
+
+	// return the response
+	rsp.Message = msg
+	return nil
 }

 // Connect to a chat using a bidirectional stream enabling the client to send and recieve messages
--- a/test/chat/main.go
+++ b/test/chat/main.go
--- a/test/chat/micro.mu
+++ b/test/chat/micro.mu
--- a/test/chat/proto/chat.pb.go
+++ b/test/chat/proto/chat.pb.go
@@ -1,13 +1,14 @@
 // Code generated by protoc-gen-go. DO NOT EDIT.
 // versions:
-// 	protoc-gen-go v1.25.0
-// 	protoc        v3.6.1
+// 	protoc-gen-go v1.23.0
+// 	protoc        v3.13.0
 // source: proto/chat.proto

 package chat

 import (
 	proto "github.com/golang/protobuf/proto"
+	timestamp "github.com/golang/protobuf/ptypes/timestamp"
 	protoreflect "google.golang.org/protobuf/reflect/protoreflect"
 	protoimpl "google.golang.org/protobuf/runtime/protoimpl"
 	reflect "reflect"
@@ -309,6 +310,8 @@ type SendResponse struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
+
+	Message *Message `protobuf:"bytes,1,opt,name=message,proto3" json:"message,omitempty"`
 }

 func (x *SendResponse) Reset() {
@@ -343,6 +346,13 @@ func (*SendResponse) Descriptor() ([]byte, []int) {
 	return file_proto_chat_proto_rawDescGZIP(), []int{5}
 }

+func (x *SendResponse) GetMessage() *Message {
+	if x != nil {
+		return x.Message
+	}
+	return nil
+}
+
 // Message sent to a chat
 type Message struct {
 	state         protoimpl.MessageState
@@ -358,7 +368,7 @@ type Message struct {
 	// id of the user who sent the message
 	UserId string `protobuf:"bytes,4,opt,name=user_id,json=userId,proto3" json:"user_id,omitempty"`
 	// time time the message was sent in unix format
-	SentAt int64 `protobuf:"varint,5,opt,name=sent_at,json=sentAt,proto3" json:"sent_at,omitempty"`
+	SentAt *timestamp.Timestamp `protobuf:"bytes,5,opt,name=sent_at,json=sentAt,proto3" json:"sent_at,omitempty"`
 	// subject of the message
 	Subject string `protobuf:"bytes,6,opt,name=subject,proto3" json:"subject,omitempty"`
 	// text of the message
@@ -425,11 +435,11 @@ func (x *Message) GetUserId() string {
 	return ""
 }

-func (x *Message) GetSentAt() int64 {
+func (x *Message) GetSentAt() *timestamp.Timestamp {
 	if x != nil {
 		return x.SentAt
 	}
-	return 0
+	return nil
 }

 func (x *Message) GetSubject() string {
@@ -450,53 +460,60 @@ var File_proto_chat_proto protoreflect.FileDescriptor

 var file_proto_chat_proto_rawDesc = []byte{
 	0x0a, 0x10, 0x70, 0x72, 0x6f, 0x74, 0x6f, 0x2f, 0x63, 0x68, 0x61, 0x74, 0x2e, 0x70, 0x72, 0x6f,
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 }

 var (
@@ -513,29 +530,32 @@ func file_proto_chat_proto_rawDescGZIP() []byte {

 var file_proto_chat_proto_msgTypes = make([]protoimpl.MessageInfo, 7)
 var file_proto_chat_proto_goTypes = []interface{}{
-	(*NewRequest)(nil),      // 0: chat.NewRequest
-	(*NewResponse)(nil),     // 1: chat.NewResponse
-	(*HistoryRequest)(nil),  // 2: chat.HistoryRequest
-	(*HistoryResponse)(nil), // 3: chat.HistoryResponse
-	(*SendRequest)(nil),     // 4: chat.SendRequest
-	(*SendResponse)(nil),    // 5: chat.SendResponse
-	(*Message)(nil),         // 6: chat.Message
+	(*NewRequest)(nil),          // 0: chat.NewRequest
+	(*NewResponse)(nil),         // 1: chat.NewResponse
+	(*HistoryRequest)(nil),      // 2: chat.HistoryRequest
+	(*HistoryResponse)(nil),     // 3: chat.HistoryResponse
+	(*SendRequest)(nil),         // 4: chat.SendRequest
+	(*SendResponse)(nil),        // 5: chat.SendResponse
+	(*Message)(nil),             // 6: chat.Message
+	(*timestamp.Timestamp)(nil), // 7: google.protobuf.Timestamp
 }
 var file_proto_chat_proto_depIdxs = []int32{
 	6, // 0: chat.HistoryResponse.messages:type_name -> chat.Message
-	0, // 1: chat.Chat.New:input_type -> chat.NewRequest
-	2, // 2: chat.Chat.History:input_type -> chat.HistoryRequest
-	4, // 3: chat.Chat.Send:input_type -> chat.SendRequest
-	6, // 4: chat.Chat.Connect:input_type -> chat.Message
-	1, // 5: chat.Chat.New:output_type -> chat.NewResponse
-	3, // 6: chat.Chat.History:output_type -> chat.HistoryResponse
-	5, // 7: chat.Chat.Send:output_type -> chat.SendResponse
-	6, // 8: chat.Chat.Connect:output_type -> chat.Message
-	5, // [5:9] is the sub-list for method output_type
-	1, // [1:5] is the sub-list for method input_type
-	1, // [1:1] is the sub-list for extension type_name
-	1, // [1:1] is the sub-list for extension extendee
-	0, // [0:1] is the sub-list for field type_name
+	6, // 1: chat.SendResponse.message:type_name -> chat.Message
+	7, // 2: chat.Message.sent_at:type_name -> google.protobuf.Timestamp
+	0, // 3: chat.Chat.New:input_type -> chat.NewRequest
+	2, // 4: chat.Chat.History:input_type -> chat.HistoryRequest
+	4, // 5: chat.Chat.Send:input_type -> chat.SendRequest
+	6, // 6: chat.Chat.Connect:input_type -> chat.Message
+	1, // 7: chat.Chat.New:output_type -> chat.NewResponse
+	3, // 8: chat.Chat.History:output_type -> chat.HistoryResponse
+	5, // 9: chat.Chat.Send:output_type -> chat.SendResponse
+	6, // 10: chat.Chat.Connect:output_type -> chat.Message
+	7, // [7:11] is the sub-list for method output_type
+	3, // [3:7] is the sub-list for method input_type
+	3, // [3:3] is the sub-list for extension type_name
+	3, // [3:3] is the sub-list for extension extendee
+	0, // [0:3] is the sub-list for field type_name
 }

 func init() { file_proto_chat_proto_init() }
--- a/test/chat/proto/chat.pb.micro.go
+++ b/test/chat/proto/chat.pb.micro.go
@@ -6,6 +6,7 @@ package chat
 import (
 	fmt "fmt"
 	proto "github.com/golang/protobuf/proto"
+	_ "github.com/golang/protobuf/ptypes/timestamp"
 	math "math"
 )

--- a/test/chat/proto/chat.proto
+++ b/test/chat/proto/chat.proto
@@ -2,6 +2,7 @@ syntax = "proto3";

 package chat;
 option go_package = "proto;chat";
+import "google/protobuf/timestamp.proto";

 service Chat {
  // New creates a chat for a group of users. The RPC is idempotent so if it's called multiple times
@@ -56,7 +57,9 @@ message SendRequest {
 }

 // SendResponse is a blank message returned when a message is successfully created
-message SendResponse {}
+message SendResponse {
+  Message message = 1;
+}

 // Message sent to a chat
 message Message {
@@ -69,7 +72,7 @@ message Message {
  // id of the user who sent the message
  string user_id = 4;
  // time time the message was sent in unix format 
-  int64 sent_at = 5;
+  google.protobuf.Timestamp sent_at = 5;
  // subject of the message
  string subject = 6;
  // text of the message