Move accountant to it's own deployment using gRCP

Makefile

@@ -8,6 +8,9 @@ install:
 	go mod download
 	go install -ldflags="-X 'github.com/mdiluz/rove/pkg/version.Version=${VERSION}'" ./...
 
+gen:
+	protoc --proto_path pkg/accounts --go_out=plugins=grpc:pkg/accounts/ --go_opt=paths=source_relative  pkg/accounts/accounts.proto
+
 test:
 	go mod download
 	go build ./...

cmd/rove-accountant/Dockerfile

@@ -0,0 +1,11 @@
+FROM golang:latest
+LABEL maintainer="Marc Di Luzio <marc.diluzio@gmail.com>"
+
+WORKDIR /app
+COPY . .
+RUN go mod download
+
+RUN go build -o rove-accountant -ldflags="-X 'github.com/mdiluz/rove/pkg/version.Version=$(git describe --always --long --dirty --tags)'" cmd/rove-accountant/main.go
+
+CMD [ "./rove-accountant" ]
+

cmd/rove-accountant/internal/accounts.go

@@ -1,4 +1,4 @@
-package accounts
+package internal
 
 import (
 	"fmt"
@@ -36,6 +36,7 @@ func (a *Accountant) RegisterAccount(name string) (acc Account, err error) {
 
 	// Set the account name
 	acc.Name = name
+	acc.Data = make(map[string]string)
 
 	// Verify this acount isn't already registered
 	for _, a := range a.Accounts {
@@ -65,7 +66,7 @@ func (a *Accountant) AssignData(account string, key string, value string) error
 }
 
 // GetRover gets the rover rover for the account
-func (a *Accountant) GetData(account string, key string) (string, error) {
+func (a *Accountant) GetValue(account string, key string) (string, error) {
 	// Find the account matching the ID
 	if this, ok := a.Accounts[account]; !ok {
 		return "", fmt.Errorf("no account found for id: %s", account)

cmd/rove-accountant/internal/accounts_test.go

@@ -1,4 +1,4 @@
-package accounts
+package internal
 
 import (
 	"testing"
@@ -58,7 +58,7 @@ func TestAccountant_AssignGetData(t *testing.T) {
 	err = accountant.AssignData(a.Name, "key", "value")
 	if err != nil {
 		t.Error("Failed to set data for created account")
-	} else if id, err := accountant.GetData(a.Name, "key"); err != nil {
+	} else if id, err := accountant.GetValue(a.Name, "key"); err != nil {
 		t.Error("Failed to get data for account")
 	} else if id != "value" {
 		t.Error("Fetched data is incorrect for account")

cmd/rove-accountant/main.go

@@ -0,0 +1,130 @@
+package main
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"log"
+	"net"
+	"os"
+	"os/signal"
+	"sync"
+	"syscall"
+
+	"github.com/mdiluz/rove/cmd/rove-accountant/internal"
+	"github.com/mdiluz/rove/pkg/accounts"
+	"github.com/mdiluz/rove/pkg/persistence"
+	"google.golang.org/grpc"
+)
+
+var address = flag.String("address", "", "port to server the accountant on")
+var data = flag.String("data", os.TempDir(), "path to persistent data")
+
+// accountantServer is the internal object to manage the requests
+type accountantServer struct {
+	accountant *internal.Accountant
+	sync       sync.RWMutex
+}
+
+// Register will register an account
+func (a *accountantServer) Register(ctx context.Context, in *accounts.RegisterInfo) (*accounts.RegisterResponse, error) {
+	a.sync.Lock()
+	defer a.sync.Unlock()
+
+	// Try and register the account itself
+	fmt.Printf("Registering account: %s\n", in.Name)
+	if _, err := a.accountant.RegisterAccount(in.Name); err != nil {
+		fmt.Printf("Error: %s\n", err)
+		return &accounts.RegisterResponse{Success: false, Error: fmt.Sprintf("error registering account: %s", err)}, nil
+	}
+
+	// Save out the accounts
+	if err := persistence.Save("accounts", a.accountant); err != nil {
+		fmt.Printf("Error: %s\n", err)
+		return &accounts.RegisterResponse{Success: false, Error: fmt.Sprintf("failed to save accounts: %s", err)}, nil
+	}
+
+	return &accounts.RegisterResponse{Success: true}, nil
+}
+
+// AssignData assigns a key value pair to an account
+func (a *accountantServer) AssignValue(_ context.Context, in *accounts.DataKeyValue) (*accounts.Response, error) {
+	a.sync.RLock()
+	defer a.sync.RUnlock()
+
+	// Try and assign the data
+	fmt.Printf("Assigning value for account %s: %s->%s\n", in.Account, in.Key, in.Value)
+	err := a.accountant.AssignData(in.Account, in.Key, in.Value)
+	if err != nil {
+		fmt.Printf("Error: %s\n", err)
+		return &accounts.Response{Success: false, Error: err.Error()}, nil
+	}
+
+	return &accounts.Response{Success: true}, nil
+
+}
+
+// GetData gets the value for a key
+func (a *accountantServer) GetValue(_ context.Context, in *accounts.DataKey) (*accounts.DataResponse, error) {
+	a.sync.RLock()
+	defer a.sync.RUnlock()
+
+	// Try and fetch the rover
+	fmt.Printf("Getting value for account %s: %s\n", in.Account, in.Key)
+	data, err := a.accountant.GetValue(in.Account, in.Key)
+	if err != nil {
+		fmt.Printf("Error: %s\n", err)
+		return &accounts.DataResponse{Success: false, Error: err.Error()}, nil
+	}
+
+	return &accounts.DataResponse{Success: true, Value: data}, nil
+
+}
+
+// main
+func main() {
+	flag.Parse()
+
+	// Verify the input
+	if len(*address) == 0 {
+		log.Fatal("No address set with --address")
+	}
+
+	persistence.SetPath(*data)
+
+	// Initialise and load the accountant
+	accountant := &internal.Accountant{}
+	if err := persistence.Load("accounts", accountant); err != nil {
+		log.Fatalf("failed to load account data: %s", err)
+	}
+
+	// Set up the RPC server and register
+	lis, err := net.Listen("tcp", *address)
+	if err != nil {
+		log.Fatalf("failed to listen: %v", err)
+	}
+	grpcServer := grpc.NewServer()
+	accounts.RegisterAccountantServer(grpcServer, &accountantServer{
+		accountant: accountant,
+	})
+
+	// Set up the close handler
+	c := make(chan os.Signal)
+	signal.Notify(c, os.Interrupt, syscall.SIGTERM)
+	go func() {
+		<-c
+		fmt.Println("Quit requested, exiting...")
+		grpcServer.Stop()
+	}()
+
+	// Serve the RPC server
+	fmt.Printf("Serving accountant on %s\n", *address)
+	if err := grpcServer.Serve(lis); err != nil {
+		log.Fatalf("failed to server gRPC: %s", err)
+	}
+
+	// Save out the accountant data
+	if err := persistence.Save("accounts", accountant); err != nil {
+		log.Fatalf("failed to save accounts: %s", err)
+	}
+}

cmd/rove-server/internal/routes.go

@@ -1,12 +1,14 @@
 package internal
 
 import (
+	"context"
 	"encoding/json"
 	"fmt"
 	"io"
 	"net/http"
 
 	"github.com/google/uuid"
+	"github.com/mdiluz/rove/pkg/accounts"
 	"github.com/mdiluz/rove/pkg/rove"
 	"github.com/mdiluz/rove/pkg/version"
 )
@@ -84,14 +86,19 @@ func HandleRegister(s *Server, vars map[string]string, b io.ReadCloser, w io.Wri
 	} else if len(data.Name) == 0 {
 		response.Error = "Cannot register empty name"
 
-	} else if acc, err := s.accountant.RegisterAccount(data.Name); err != nil {
+	}
+	reg := accounts.RegisterInfo{Name: data.Name}
+	if acc, err := s.accountant.Register(context.Background(), &reg); err != nil {
 		response.Error = err.Error()
 
-	} else if _, _, err := s.SpawnRoverForAccount(acc.Name); err != nil {
+	} else if !acc.Success {
+		response.Error = acc.Error
+
+	} else if _, _, err := s.SpawnRoverForAccount(data.Name); err != nil {
 		response.Error = err.Error()
 
-	} else if err := s.SaveAll(); err != nil {
+	} else if err := s.SaveWorld(); err != nil {
-		response.Error = fmt.Sprintf("Internal server error when saving: %s", err)
+		response.Error = fmt.Sprintf("Internal server error when saving world: %s", err)
 
 	} else {
 		// Save out the new accounts
@@ -116,13 +123,19 @@ func HandleCommand(s *Server, vars map[string]string, b io.ReadCloser, w io.Writ
 		fmt.Printf("Failed to decode json: %s\n", err)
 		response.Error = err.Error()
 
-	} else if len(id) == 0 {
+	}
+
+	key := accounts.DataKey{Account: id, Key: "rover"}
+	if len(id) == 0 {
 		response.Error = "No account ID provided"
 
-	} else if inst, err := s.accountant.GetData(id, "rover"); err != nil {
+	} else if resp, err := s.accountant.GetValue(context.Background(), &key); err != nil {
 		response.Error = fmt.Sprintf("Provided account has no rover: %s", err)
 
-	} else if id, err := uuid.Parse(inst); err != nil {
+	} else if !resp.Success {
+		response.Error = resp.Error
+
+	} else if id, err := uuid.Parse(resp.Value); err != nil {
 		response.Error = fmt.Sprintf("Account had invalid rover id: %s", err)
 
 	} else if err := s.world.Enqueue(id, data.Commands...); err != nil {
@@ -143,13 +156,17 @@ func HandleRadar(s *Server, vars map[string]string, b io.ReadCloser, w io.Writer
 	}
 
 	id := vars["account"]
+	key := accounts.DataKey{Account: id, Key: "rover"}
 	if len(id) == 0 {
 		response.Error = "No account ID provided"
 
-	} else if inst, err := s.accountant.GetData(id, "rover"); err != nil {
+	} else if resp, err := s.accountant.GetValue(context.Background(), &key); err != nil {
 		response.Error = fmt.Sprintf("Provided account has no rover: %s", err)
 
-	} else if id, err := uuid.Parse(inst); err != nil {
+	} else if !resp.Success {
+		response.Error = resp.Error
+
+	} else if id, err := uuid.Parse(resp.Value); err != nil {
 		response.Error = fmt.Sprintf("Account had invalid rover id: %s", err)
 
 	} else if attrib, err := s.world.RoverAttributes(id); err != nil {
@@ -175,13 +192,17 @@ func HandleRover(s *Server, vars map[string]string, b io.ReadCloser, w io.Writer
 	}
 
 	id := vars["account"]
+	key := accounts.DataKey{Account: id, Key: "rover"}
 	if len(id) == 0 {
 		response.Error = "No account ID provided"
 
-	} else if inst, err := s.accountant.GetData(id, "rover"); err != nil {
+	} else if resp, err := s.accountant.GetValue(context.Background(), &key); err != nil {
 		response.Error = fmt.Sprintf("Provided account has no rover: %s", err)
 
-	} else if id, err := uuid.Parse(inst); err != nil {
+	} else if !resp.Success {
+		response.Error = resp.Error
+
+	} else if id, err := uuid.Parse(resp.Value); err != nil {
 		response.Error = fmt.Sprintf("Account had invalid rover id: %s", err)
 
 	} else if attribs, err := s.world.RoverAttributes(id); err != nil {

cmd/rove-server/internal/routes_test.go

@@ -2,12 +2,14 @@ package internal
 
 import (
 	"bytes"
+	"context"
 	"encoding/json"
 	"net/http"
 	"net/http/httptest"
 	"path"
 	"testing"
 
+	"github.com/mdiluz/rove/pkg/accounts"
 	"github.com/mdiluz/rove/pkg/game"
 	"github.com/mdiluz/rove/pkg/rove"
 	"github.com/mdiluz/rove/pkg/vector"
@@ -62,11 +64,15 @@ func TestHandleRegister(t *testing.T) {
 func TestHandleCommand(t *testing.T) {
 	s := NewServer()
 	s.Initialise(false) // Leave the world empty with no obstacles
-	a, err := s.accountant.RegisterAccount("test")
+	reg := accounts.RegisterInfo{Name: "test"}
+	acc, err := s.accountant.Register(context.Background(), &reg)
+	assert.NoError(t, err)
+	assert.True(t, acc.Success)
+
 	assert.NoError(t, err, "Error registering account")
 
 	// Spawn the rover rover for the account
-	_, inst, err := s.SpawnRoverForAccount(a.Name)
+	_, inst, err := s.SpawnRoverForAccount("test")
 	assert.NoError(t, s.world.WarpRover(inst, vector.Vector{}))
 
 	attribs, err := s.world.RoverAttributes(inst)
@@ -85,7 +91,7 @@ func TestHandleCommand(t *testing.T) {
 	b, err := json.Marshal(data)
 	assert.NoError(t, err, "Error marshalling data")
 
-	request, _ := http.NewRequest(http.MethodPost, path.Join("/", a.Name, "/command"), bytes.NewReader(b))
+	request, _ := http.NewRequest(http.MethodPost, path.Join("/", "test", "/command"), bytes.NewReader(b))
 	response := httptest.NewRecorder()
 
 	s.router.ServeHTTP(response, request)
@@ -114,11 +120,14 @@ func TestHandleCommand(t *testing.T) {
 func TestHandleRadar(t *testing.T) {
 	s := NewServer()
 	s.Initialise(false) // Spawn a clean world
-	a, err := s.accountant.RegisterAccount("test")
+	reg := accounts.RegisterInfo{Name: "test"}
+	acc, err := s.accountant.Register(context.Background(), &reg)
+	assert.NoError(t, err)
+	assert.True(t, acc.Success)
 	assert.NoError(t, err, "Error registering account")
 
 	// Spawn the rover rover for the account
-	attrib, id, err := s.SpawnRoverForAccount(a.Name)
+	attrib, id, err := s.SpawnRoverForAccount("test")
 	assert.NoError(t, err)
 
 	// Warp this rover to 0,0
@@ -134,7 +143,7 @@ func TestHandleRadar(t *testing.T) {
 	assert.NoError(t, s.world.Atlas.SetTile(rockPos, game.TileRock))
 	assert.NoError(t, s.world.Atlas.SetTile(emptyPos, game.TileEmpty))
 
-	request, _ := http.NewRequest(http.MethodGet, path.Join("/", a.Name, "/radar"), nil)
+	request, _ := http.NewRequest(http.MethodGet, path.Join("/", "test", "/radar"), nil)
 	response := httptest.NewRecorder()
 
 	s.router.ServeHTTP(response, request)
@@ -168,14 +177,16 @@ func TestHandleRadar(t *testing.T) {
 func TestHandleRover(t *testing.T) {
 	s := NewServer()
 	s.Initialise(true)
-	a, err := s.accountant.RegisterAccount("test")
+	reg := accounts.RegisterInfo{Name: "test"}
-	assert.NoError(t, err, "Error registering account")
+	acc, err := s.accountant.Register(context.Background(), &reg)
+	assert.NoError(t, err)
+	assert.True(t, acc.Success)
 
 	// Spawn one rover for the account
-	attribs, _, err := s.SpawnRoverForAccount(a.Name)
+	attribs, _, err := s.SpawnRoverForAccount("test")
 	assert.NoError(t, err)
 
-	request, _ := http.NewRequest(http.MethodGet, path.Join("/", a.Name, "/rover"), nil)
+	request, _ := http.NewRequest(http.MethodGet, path.Join("/", "test", "/rover"), nil)
 	response := httptest.NewRecorder()
 
 	s.router.ServeHTTP(response, request)

cmd/rove-server/internal/server.go

@@ -3,6 +3,7 @@ package internal
 import (
 	"context"
 	"encoding/json"
+	"flag"
 	"fmt"
 	"log"
 	"net"
@@ -16,8 +17,11 @@ import (
 	"github.com/mdiluz/rove/pkg/game"
 	"github.com/mdiluz/rove/pkg/persistence"
 	"github.com/robfig/cron"
+	"google.golang.org/grpc"
 )
 
+var accountantAddress = flag.String("accountant", "", "address of the accountant to connect to")
+
 const (
 	// PersistentData will allow the server to load and save it's state
 	PersistentData = iota
@@ -30,8 +34,11 @@ const (
 type Server struct {
 
 	// Internal state
-	accountant *accounts.Accountant
+	world *game.World
-	world      *game.World
+
+	// Accountant server
+	accountant accounts.AccountantClient
+	clientConn *grpc.ClientConn
 
 	// HTTP server
 	listener net.Listener
@@ -96,9 +103,6 @@ func NewServer(opts ...ServerOption) *Server {
 	// Set up the server object
 	s.server = &http.Server{Addr: s.address, Handler: s.router}
 
-	// Create the accountant
-	s.accountant = accounts.NewAccountant()
-
 	// Start small, we can grow the world later
 	s.world = game.NewWorld(4, 8)
 
@@ -111,13 +115,21 @@ func (s *Server) Initialise(fillWorld bool) (err error) {
 	// Add to our sync
 	s.sync.Add(1)
 
+	// Connect to the accountant
+	fmt.Printf("Dialing accountant on %s\n", *accountantAddress)
+	clientConn, err := grpc.Dial(*accountantAddress, grpc.WithInsecure())
+	if err != nil {
+		return err
+	}
+	s.accountant = accounts.NewAccountantClient(clientConn)
+
 	// Spawn a border on the default world
 	if err := s.world.SpawnWorld(fillWorld); err != nil {
 		return err
 	}
 
-	// Load the accounts if requested
+	// Load the world file
-	if err := s.LoadAll(); err != nil {
+	if err := s.LoadWorld(); err != nil {
 		return err
 	}
 
@@ -183,6 +195,11 @@ func (s *Server) Stop() error {
 		return err
 	}
 
+	// Close the accountant connection
+	if err := s.clientConn.Close(); err != nil {
+		return err
+	}
+
 	return nil
 }
 
@@ -192,7 +209,7 @@ func (s *Server) Close() error {
 	s.sync.Wait()
 
 	// Save and return
-	return s.SaveAll()
+	return s.SaveWorld()
 }
 
 // Close waits until the server is finished and closes up shop
@@ -218,36 +235,12 @@ func (s *Server) SaveWorld() error {
 	return nil
 }
 
-// SaveAccounts will save out the accounts file
+// LoadWorld will load all persistent data
-func (s *Server) SaveAccounts() error {
+func (s *Server) LoadWorld() error {
-	if s.persistence == PersistentData {
-		if err := persistence.SaveAll("accounts", s.accountant); err != nil {
-			return fmt.Errorf("failed to save out persistent data: %s", err)
-		}
-	}
-	return nil
-}
-
-// SaveAll will save out all server files
-func (s *Server) SaveAll() error {
-	// Save the accounts if requested
-	if s.persistence == PersistentData {
-		s.world.RLock()
-		defer s.world.RUnlock()
-
-		if err := persistence.SaveAll("accounts", s.accountant, "world", s.world); err != nil {
-			return err
-		}
-	}
-	return nil
-}
-
-// LoadAll will load all persistent data
-func (s *Server) LoadAll() error {
 	if s.persistence == PersistentData {
 		s.world.Lock()
 		defer s.world.Unlock()
-		if err := persistence.LoadAll("accounts", &s.accountant, "world", &s.world); err != nil {
+		if err := persistence.LoadAll("world", &s.world); err != nil {
 			return err
 		}
 	}
@@ -289,7 +282,11 @@ func (s *Server) SpawnRoverForAccount(account string) (game.RoverAttributes, uui
 		return game.RoverAttributes{}, uuid.UUID{}, fmt.Errorf("No attributes found for created rover: %s", err)
 
 	} else {
-		if err := s.accountant.AssignData(account, "rover", inst.String()); err != nil {
+		keyval := accounts.DataKeyValue{Account: account, Key: "rover", Value: inst.String()}
+		resp, err := s.accountant.AssignValue(context.Background(), &keyval)
+		if err != nil || !resp.Success {
+			fmt.Printf("Failed to assign rover to account, %s, %s", err, resp.Error)
+
 			// Try and clear up the rover
 			if err := s.world.DestroyRover(inst); err != nil {
 				fmt.Printf("Failed to destroy rover after failed rover assign: %s", err)

cmd/rove/main.go

@@ -113,6 +113,9 @@ func InnerMain(command string) error {
 		}
 
 	case "register":
+		if len(*name) == 0 {
+			return fmt.Errorf("must set name with -name")
+		}
 		d := rove.RegisterData{
 			Name: *name,
 		}
@@ -125,8 +128,8 @@ func InnerMain(command string) error {
 			return fmt.Errorf("Server returned failure: %s", response.Error)
 
 		default:
-			fmt.Printf("Registered account with id: %s\n", d.Name)
+			fmt.Printf("Registered account with id: %s\n", *name)
-			config.Accounts[config.Host] = d.Name
+			config.Accounts[config.Host] = *name
 		}
 
 	case "move":

docker-compose.yml

@@ -11,6 +11,17 @@ services:
     image: rove-server:latest
     ports:
       - "80:80"
-    command: ./rove-server --address ":80" --data=/mnt/rove-server ${ROVE_ARGS}
+    command: ./rove-server --address ":80" --data=/mnt/rove-server ${ROVE_ARGS} --accountant "rove-accountant:8081"
+    volumes:
+      - persistent-data:/mnt/rove-server:rw
+
+  rove-accountant:
+    build:
+      context: .
+      dockerfile: cmd/rove-accountant/Dockerfile
+    image: rove-accountant:latest
+    ports:
+      - "8081:8081"
+    command: ./rove-accountant --address ":8081" --data=/mnt/rove-server
     volumes:
       - persistent-data:/mnt/rove-server:rw

go.mod

@@ -3,9 +3,11 @@ module github.com/mdiluz/rove
 go 1.14
 
 require (
+	github.com/golang/protobuf v1.4.2
 	github.com/google/uuid v1.1.1
 	github.com/gorilla/mux v1.7.4
 	github.com/robfig/cron v1.2.0
 	github.com/stretchr/testify v1.6.0
 	github.com/tjarratt/babble v0.0.0-20191209142150-eecdf8c2339d
+	google.golang.org/grpc v1.29.1
 )

go.sum

@@ -1,11 +1,36 @@
+cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
+github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
+github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
 github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/envoyproxy/go-control-plane v0.9.0/go.mod h1:YTl/9mNaCwkRvm6d1a2C3ymFceY/DCBVvsKhRF0iEA4=
+github.com/envoyproxy/go-control-plane v0.9.4/go.mod h1:6rpuAdCZL397s3pYoYcLgu1mIlRU8Am5FuJP05cCM98=
+github.com/envoyproxy/protoc-gen-validate v0.1.0/go.mod h1:iSmxcyjqTsJpI2R4NaDN7+kN2VEUnK/pcBlmesArF7c=
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 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
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pkg/accounts/accounts.pb.go

@@ -0,0 +1,503 @@
+// Code generated by protoc-gen-go. DO NOT EDIT.
+// source: accounts.proto
+
+package accounts
+
+import (
+	context "context"
+	fmt "fmt"
+	proto "github.com/golang/protobuf/proto"
+	grpc "google.golang.org/grpc"
+	codes "google.golang.org/grpc/codes"
+	status "google.golang.org/grpc/status"
+	math "math"
+)
+
+// 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
+
+type RegisterInfo struct {
+	Name                 string   `protobuf:"bytes,1,opt,name=name,proto3" json:"name,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *RegisterInfo) Reset()         { *m = RegisterInfo{} }
+func (m *RegisterInfo) String() string { return proto.CompactTextString(m) }
+func (*RegisterInfo) ProtoMessage()    {}
+func (*RegisterInfo) Descriptor() ([]byte, []int) {
+	return fileDescriptor_e1e7723af4c007b7, []int{0}
+}
+
+func (m *RegisterInfo) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_RegisterInfo.Unmarshal(m, b)
+}
+func (m *RegisterInfo) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_RegisterInfo.Marshal(b, m, deterministic)
+}
+func (m *RegisterInfo) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_RegisterInfo.Merge(m, src)
+}
+func (m *RegisterInfo) XXX_Size() int {
+	return xxx_messageInfo_RegisterInfo.Size(m)
+}
+func (m *RegisterInfo) XXX_DiscardUnknown() {
+	xxx_messageInfo_RegisterInfo.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_RegisterInfo proto.InternalMessageInfo
+
+func (m *RegisterInfo) GetName() string {
+	if m != nil {
+		return m.Name
+	}
+	return ""
+}
+
+type RegisterResponse struct {
+	Success              bool     `protobuf:"varint,1,opt,name=success,proto3" json:"success,omitempty"`
+	Error                string   `protobuf:"bytes,2,opt,name=error,proto3" json:"error,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *RegisterResponse) Reset()         { *m = RegisterResponse{} }
+func (m *RegisterResponse) String() string { return proto.CompactTextString(m) }
+func (*RegisterResponse) ProtoMessage()    {}
+func (*RegisterResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_e1e7723af4c007b7, []int{1}
+}
+
+func (m *RegisterResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_RegisterResponse.Unmarshal(m, b)
+}
+func (m *RegisterResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_RegisterResponse.Marshal(b, m, deterministic)
+}
+func (m *RegisterResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_RegisterResponse.Merge(m, src)
+}
+func (m *RegisterResponse) XXX_Size() int {
+	return xxx_messageInfo_RegisterResponse.Size(m)
+}
+func (m *RegisterResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_RegisterResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_RegisterResponse proto.InternalMessageInfo
+
+func (m *RegisterResponse) GetSuccess() bool {
+	if m != nil {
+		return m.Success
+	}
+	return false
+}
+
+func (m *RegisterResponse) GetError() string {
+	if m != nil {
+		return m.Error
+	}
+	return ""
+}
+
+type DataKeyValue struct {
+	Account              string   `protobuf:"bytes,1,opt,name=account,proto3" json:"account,omitempty"`
+	Key                  string   `protobuf:"bytes,2,opt,name=key,proto3" json:"key,omitempty"`
+	Value                string   `protobuf:"bytes,3,opt,name=value,proto3" json:"value,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *DataKeyValue) Reset()         { *m = DataKeyValue{} }
+func (m *DataKeyValue) String() string { return proto.CompactTextString(m) }
+func (*DataKeyValue) ProtoMessage()    {}
+func (*DataKeyValue) Descriptor() ([]byte, []int) {
+	return fileDescriptor_e1e7723af4c007b7, []int{2}
+}
+
+func (m *DataKeyValue) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_DataKeyValue.Unmarshal(m, b)
+}
+func (m *DataKeyValue) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_DataKeyValue.Marshal(b, m, deterministic)
+}
+func (m *DataKeyValue) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_DataKeyValue.Merge(m, src)
+}
+func (m *DataKeyValue) XXX_Size() int {
+	return xxx_messageInfo_DataKeyValue.Size(m)
+}
+func (m *DataKeyValue) XXX_DiscardUnknown() {
+	xxx_messageInfo_DataKeyValue.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_DataKeyValue proto.InternalMessageInfo
+
+func (m *DataKeyValue) GetAccount() string {
+	if m != nil {
+		return m.Account
+	}
+	return ""
+}
+
+func (m *DataKeyValue) GetKey() string {
+	if m != nil {
+		return m.Key
+	}
+	return ""
+}
+
+func (m *DataKeyValue) GetValue() string {
+	if m != nil {
+		return m.Value
+	}
+	return ""
+}
+
+type Response struct {
+	Success              bool     `protobuf:"varint,1,opt,name=success,proto3" json:"success,omitempty"`
+	Error                string   `protobuf:"bytes,2,opt,name=error,proto3" json:"error,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *Response) Reset()         { *m = Response{} }
+func (m *Response) String() string { return proto.CompactTextString(m) }
+func (*Response) ProtoMessage()    {}
+func (*Response) Descriptor() ([]byte, []int) {
+	return fileDescriptor_e1e7723af4c007b7, []int{3}
+}
+
+func (m *Response) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_Response.Unmarshal(m, b)
+}
+func (m *Response) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_Response.Marshal(b, m, deterministic)
+}
+func (m *Response) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_Response.Merge(m, src)
+}
+func (m *Response) XXX_Size() int {
+	return xxx_messageInfo_Response.Size(m)
+}
+func (m *Response) XXX_DiscardUnknown() {
+	xxx_messageInfo_Response.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_Response proto.InternalMessageInfo
+
+func (m *Response) GetSuccess() bool {
+	if m != nil {
+		return m.Success
+	}
+	return false
+}
+
+func (m *Response) GetError() string {
+	if m != nil {
+		return m.Error
+	}
+	return ""
+}
+
+type DataKey struct {
+	Account              string   `protobuf:"bytes,1,opt,name=account,proto3" json:"account,omitempty"`
+	Key                  string   `protobuf:"bytes,2,opt,name=key,proto3" json:"key,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *DataKey) Reset()         { *m = DataKey{} }
+func (m *DataKey) String() string { return proto.CompactTextString(m) }
+func (*DataKey) ProtoMessage()    {}
+func (*DataKey) Descriptor() ([]byte, []int) {
+	return fileDescriptor_e1e7723af4c007b7, []int{4}
+}
+
+func (m *DataKey) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_DataKey.Unmarshal(m, b)
+}
+func (m *DataKey) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_DataKey.Marshal(b, m, deterministic)
+}
+func (m *DataKey) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_DataKey.Merge(m, src)
+}
+func (m *DataKey) XXX_Size() int {
+	return xxx_messageInfo_DataKey.Size(m)
+}
+func (m *DataKey) XXX_DiscardUnknown() {
+	xxx_messageInfo_DataKey.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_DataKey proto.InternalMessageInfo
+
+func (m *DataKey) GetAccount() string {
+	if m != nil {
+		return m.Account
+	}
+	return ""
+}
+
+func (m *DataKey) GetKey() string {
+	if m != nil {
+		return m.Key
+	}
+	return ""
+}
+
+type DataResponse struct {
+	Success              bool     `protobuf:"varint,1,opt,name=success,proto3" json:"success,omitempty"`
+	Error                string   `protobuf:"bytes,2,opt,name=error,proto3" json:"error,omitempty"`
+	Value                string   `protobuf:"bytes,3,opt,name=value,proto3" json:"value,omitempty"`
+	XXX_NoUnkeyedLiteral struct{} `json:"-"`
+	XXX_unrecognized     []byte   `json:"-"`
+	XXX_sizecache        int32    `json:"-"`
+}
+
+func (m *DataResponse) Reset()         { *m = DataResponse{} }
+func (m *DataResponse) String() string { return proto.CompactTextString(m) }
+func (*DataResponse) ProtoMessage()    {}
+func (*DataResponse) Descriptor() ([]byte, []int) {
+	return fileDescriptor_e1e7723af4c007b7, []int{5}
+}
+
+func (m *DataResponse) XXX_Unmarshal(b []byte) error {
+	return xxx_messageInfo_DataResponse.Unmarshal(m, b)
+}
+func (m *DataResponse) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) {
+	return xxx_messageInfo_DataResponse.Marshal(b, m, deterministic)
+}
+func (m *DataResponse) XXX_Merge(src proto.Message) {
+	xxx_messageInfo_DataResponse.Merge(m, src)
+}
+func (m *DataResponse) XXX_Size() int {
+	return xxx_messageInfo_DataResponse.Size(m)
+}
+func (m *DataResponse) XXX_DiscardUnknown() {
+	xxx_messageInfo_DataResponse.DiscardUnknown(m)
+}
+
+var xxx_messageInfo_DataResponse proto.InternalMessageInfo
+
+func (m *DataResponse) GetSuccess() bool {
+	if m != nil {
+		return m.Success
+	}
+	return false
+}
+
+func (m *DataResponse) GetError() string {
+	if m != nil {
+		return m.Error
+	}
+	return ""
+}
+
+func (m *DataResponse) GetValue() string {
+	if m != nil {
+		return m.Value
+	}
+	return ""
+}
+
+func init() {
+	proto.RegisterType((*RegisterInfo)(nil), "accounts.RegisterInfo")
+	proto.RegisterType((*RegisterResponse)(nil), "accounts.RegisterResponse")
+	proto.RegisterType((*DataKeyValue)(nil), "accounts.DataKeyValue")
+	proto.RegisterType((*Response)(nil), "accounts.Response")
+	proto.RegisterType((*DataKey)(nil), "accounts.DataKey")
+	proto.RegisterType((*DataResponse)(nil), "accounts.DataResponse")
+}
+
+func init() {
+	proto.RegisterFile("accounts.proto", fileDescriptor_e1e7723af4c007b7)
+}
+
+var fileDescriptor_e1e7723af4c007b7 = []byte{
+	// 298 bytes of a gzipped FileDescriptorProto
+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x9c, 0x92, 0x4f, 0x4b, 0xc3, 0x40,
+	0x10, 0xc5, 0x8d, 0x55, 0x1b, 0xc7, 0x22, 0x75, 0x11, 0x09, 0x39, 0xc9, 0x8a, 0xe0, 0x29, 0x01,
+	0x45, 0x04, 0xbd, 0xd8, 0x22, 0x88, 0x78, 0x91, 0x20, 0x1e, 0xbc, 0x6d, 0xe3, 0x18, 0x43, 0x9b,
+	0xdd, 0xb0, 0x7f, 0x0a, 0xf5, 0xf3, 0xf9, 0xc1, 0x24, 0xbb, 0xd9, 0x1a, 0xac, 0x17, 0x7b, 0xdb,
+	0x17, 0xe6, 0xf7, 0xe6, 0xcd, 0x4c, 0x60, 0x9f, 0xe5, 0xb9, 0x30, 0x5c, 0xab, 0xa4, 0x96, 0x42,
+	0x0b, 0x12, 0x7a, 0x4d, 0x29, 0x0c, 0x32, 0x2c, 0x4a, 0xa5, 0x51, 0x3e, 0xf0, 0x77, 0x41, 0x08,
+	0x6c, 0x71, 0x56, 0x61, 0x14, 0x1c, 0x07, 0x67, 0xbb, 0x99, 0x7d, 0xd3, 0x31, 0x0c, 0x7d, 0x4d,
+	0x86, 0xaa, 0x16, 0x5c, 0x21, 0x89, 0xa0, 0xaf, 0x4c, 0x9e, 0xa3, 0x52, 0xb6, 0x34, 0xcc, 0xbc,
+	0x24, 0x87, 0xb0, 0x8d, 0x52, 0x0a, 0x19, 0x6d, 0x5a, 0x0b, 0x27, 0xe8, 0x13, 0x0c, 0xee, 0x98,
+	0x66, 0x8f, 0xb8, 0x78, 0x61, 0x33, 0x63, 0xf9, 0x36, 0x43, 0xdb, 0xca, 0x4b, 0x32, 0x84, 0xde,
+	0x14, 0x17, 0x2d, 0xdd, 0x3c, 0x1b, 0xc7, 0x79, 0x03, 0x45, 0x3d, 0xe7, 0x68, 0x05, 0xbd, 0x86,
+	0x70, 0xed, 0x34, 0x97, 0xd0, 0x6f, 0xd3, 0xfc, 0x27, 0x08, 0x7d, 0x76, 0x43, 0xac, 0xdb, 0xf6,
+	0xef, 0x41, 0xce, 0xbf, 0x02, 0x80, 0x91, 0xeb, 0xc9, 0xb8, 0x26, 0xb7, 0xcd, 0x5c, 0x6e, 0xdb,
+	0xe4, 0x28, 0x59, 0x1e, 0xae, 0x7b, 0xa5, 0x38, 0x5e, 0xfd, 0xee, 0x43, 0xd1, 0x0d, 0x72, 0x03,
+	0x7b, 0x23, 0xa5, 0xca, 0x82, 0xbb, 0x55, 0x77, 0x4c, 0xba, 0x27, 0x88, 0x49, 0xd7, 0x64, 0x09,
+	0x5f, 0x41, 0x78, 0x8f, 0xda, 0x91, 0x07, 0x2b, 0x64, 0xfc, 0xcb, 0xec, 0x07, 0x1c, 0x9f, 0xbe,
+	0x9e, 0x14, 0xa5, 0xfe, 0x30, 0x93, 0x24, 0x17, 0x55, 0x5a, 0xbd, 0x95, 0x33, 0xf3, 0x99, 0x4a,
+	0x31, 0xc7, 0xb4, 0x9e, 0x16, 0xa9, 0xa7, 0x26, 0x3b, 0xf6, 0x0f, 0xbc, 0xf8, 0x0e, 0x00, 0x00,
+	0xff, 0xff, 0xef, 0x53, 0xc6, 0xba, 0x93, 0x02, 0x00, 0x00,
+}
+
+// Reference imports to suppress errors if they are not otherwise used.
+var _ context.Context
+var _ grpc.ClientConnInterface
+
+// This is a compile-time assertion to ensure that this generated file
+// is compatible with the grpc package it is being compiled against.
+const _ = grpc.SupportPackageIsVersion6
+
+// AccountantClient is the client API for Accountant service.
+//
+// For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
+type AccountantClient interface {
+	Register(ctx context.Context, in *RegisterInfo, opts ...grpc.CallOption) (*RegisterResponse, error)
+	AssignValue(ctx context.Context, in *DataKeyValue, opts ...grpc.CallOption) (*Response, error)
+	GetValue(ctx context.Context, in *DataKey, opts ...grpc.CallOption) (*DataResponse, error)
+}
+
+type accountantClient struct {
+	cc grpc.ClientConnInterface
+}
+
+func NewAccountantClient(cc grpc.ClientConnInterface) AccountantClient {
+	return &accountantClient{cc}
+}
+
+func (c *accountantClient) Register(ctx context.Context, in *RegisterInfo, opts ...grpc.CallOption) (*RegisterResponse, error) {
+	out := new(RegisterResponse)
+	err := c.cc.Invoke(ctx, "/accounts.Accountant/Register", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *accountantClient) AssignValue(ctx context.Context, in *DataKeyValue, opts ...grpc.CallOption) (*Response, error) {
+	out := new(Response)
+	err := c.cc.Invoke(ctx, "/accounts.Accountant/AssignValue", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+func (c *accountantClient) GetValue(ctx context.Context, in *DataKey, opts ...grpc.CallOption) (*DataResponse, error) {
+	out := new(DataResponse)
+	err := c.cc.Invoke(ctx, "/accounts.Accountant/GetValue", in, out, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
+// AccountantServer is the server API for Accountant service.
+type AccountantServer interface {
+	Register(context.Context, *RegisterInfo) (*RegisterResponse, error)
+	AssignValue(context.Context, *DataKeyValue) (*Response, error)
+	GetValue(context.Context, *DataKey) (*DataResponse, error)
+}
+
+// UnimplementedAccountantServer can be embedded to have forward compatible implementations.
+type UnimplementedAccountantServer struct {
+}
+
+func (*UnimplementedAccountantServer) Register(ctx context.Context, req *RegisterInfo) (*RegisterResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method Register not implemented")
+}
+func (*UnimplementedAccountantServer) AssignValue(ctx context.Context, req *DataKeyValue) (*Response, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method AssignValue not implemented")
+}
+func (*UnimplementedAccountantServer) GetValue(ctx context.Context, req *DataKey) (*DataResponse, error) {
+	return nil, status.Errorf(codes.Unimplemented, "method GetValue not implemented")
+}
+
+func RegisterAccountantServer(s *grpc.Server, srv AccountantServer) {
+	s.RegisterService(&_Accountant_serviceDesc, srv)
+}
+
+func _Accountant_Register_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(RegisterInfo)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(AccountantServer).Register(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/accounts.Accountant/Register",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(AccountantServer).Register(ctx, req.(*RegisterInfo))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _Accountant_AssignValue_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(DataKeyValue)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(AccountantServer).AssignValue(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/accounts.Accountant/AssignValue",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(AccountantServer).AssignValue(ctx, req.(*DataKeyValue))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+func _Accountant_GetValue_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc.UnaryServerInterceptor) (interface{}, error) {
+	in := new(DataKey)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(AccountantServer).GetValue(ctx, in)
+	}
+	info := &grpc.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/accounts.Accountant/GetValue",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(AccountantServer).GetValue(ctx, req.(*DataKey))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
+var _Accountant_serviceDesc = grpc.ServiceDesc{
+	ServiceName: "accounts.Accountant",
+	HandlerType: (*AccountantServer)(nil),
+	Methods: []grpc.MethodDesc{
+		{
+			MethodName: "Register",
+			Handler:    _Accountant_Register_Handler,
+		},
+		{
+			MethodName: "AssignValue",
+			Handler:    _Accountant_AssignValue_Handler,
+		},
+		{
+			MethodName: "GetValue",
+			Handler:    _Accountant_GetValue_Handler,
+		},
+	},
+	Streams:  []grpc.StreamDesc{},
+	Metadata: "accounts.proto",
+}

pkg/accounts/accounts.proto

@@ -0,0 +1,43 @@
+syntax = "proto3";
+
+option go_package = "github.com/mdiluz/rove/pkg/accounts";
+
+package accounts;
+
+service Accountant {
+    rpc Register(RegisterInfo) returns (RegisterResponse) {}
+    rpc AssignValue(DataKeyValue) returns (Response) {}
+    rpc GetValue(DataKey) returns (DataResponse) {}
+}
+
+message RegisterInfo {
+    string name = 1;
+}
+
+message RegisterResponse {
+    bool success = 1;
+    string error = 2;
+}
+
+message DataKeyValue {
+    string account = 1;
+    string key = 2;
+    string value = 3;
+}
+
+message Response {
+    bool success = 1;
+    string error = 2;
+}
+
+message DataKey {
+    string account = 1;
+    string key = 2;
+}
+
+message DataResponse {
+    bool success = 1;
+    string error = 2;
+
+    string value = 3;
+}