Implement first iteration of node

The coordinator implementation has been refactored to allow all the goroutines
to be handled from the node.

.gitignore

@@ -1 +0,0 @@
-gotest.sh

cli/node/.gitignore

@@ -0,0 +1 @@
+cfg.example.secret.toml

cli/node/cfg.example.toml

@@ -0,0 +1,29 @@
+[StateDB]
+Path = "/tmp/iden3-test/hermez/statedb"
+
+[PostgreSQL]
+Port     = 5432
+Host     = "localhost"
+User     = "hermez"
+Password = "yourpasswordhere"
+
+[L2DB]
+Name         = "l2"
+SafetyPeriod = 10
+MaxTxs       = 512
+TTL          = "24h"
+
+[HistoryDB]
+Name = "history"
+
+[Web3]
+URL = "XXX"
+
+[TxSelector]
+Path = "/tmp/iden3-test/hermez/txselector"
+
+[BatchBuilder]
+Path = "/tmp/iden3-test/hermez/batchbuilder"
+
+[Synchronizer]
+SyncLoopInterval = "1s"

cli/node/coordcfg.example.toml

@@ -0,0 +1,2 @@
+ForgerAddress = "0x6BB84Cc84D4A34467aD12a2039A312f7029e2071"
+ForgerLoopInterval = "500ms"

cli/node/main.go

@@ -0,0 +1,156 @@
+package main
+
+import (
+	"fmt"
+	"os"
+	"os/signal"
+
+	"github.com/hermeznetwork/hermez-node/config"
+	"github.com/hermeznetwork/hermez-node/log"
+	"github.com/hermeznetwork/hermez-node/node"
+	"github.com/urfave/cli/v2"
+)
+
+const (
+	flagCfg      = "cfg"
+	flagCoordCfg = "coordcfg"
+	flagMode     = "mode"
+	modeSync     = "sync"
+	modeCoord    = "coord"
+)
+
+func cmdInit(c *cli.Context) error {
+	log.Info("Init")
+	cfg, err := parseCli(c)
+	if err != nil {
+		return err
+	}
+	fmt.Println("TODO", cfg)
+	return err
+}
+
+func cmdRun(c *cli.Context) error {
+	cfg, err := parseCli(c)
+	if err != nil {
+		return fmt.Errorf("error parsing flags and config: %w", err)
+	}
+	node, err := node.NewNode(cfg.mode, cfg.node, cfg.coord)
+	if err != nil {
+		return fmt.Errorf("error starting node: %w", err)
+	}
+	node.Start()
+
+	stopCh := make(chan interface{})
+
+	// catch ^C to send the stop signal
+	ossig := make(chan os.Signal, 1)
+	signal.Notify(ossig, os.Interrupt)
+	go func() {
+		for sig := range ossig {
+			if sig == os.Interrupt {
+				stopCh <- nil
+			}
+		}
+	}()
+	<-stopCh
+	node.Stop()
+
+	return nil
+}
+
+// Config is the configuration of the hermez node execution
+type Config struct {
+	mode  node.Mode
+	node  *config.Node
+	coord *config.Coordinator
+}
+
+func parseCli(c *cli.Context) (*Config, error) {
+	cfg, err := getConfig(c)
+	if err != nil {
+		if err := cli.ShowAppHelp(c); err != nil {
+			panic(err)
+		}
+		return nil, err
+	}
+	return cfg, nil
+}
+
+func getConfig(c *cli.Context) (*Config, error) {
+	var cfg Config
+	mode := c.String(flagMode)
+	switch mode {
+	case modeSync:
+		cfg.mode = node.ModeSynchronizer
+	case modeCoord:
+		cfg.mode = node.ModeCoordinator
+	default:
+		return nil, fmt.Errorf("invalid mode \"%v\"", mode)
+	}
+
+	if cfg.mode == node.ModeCoordinator {
+		coordCfgPath := c.String(flagCoordCfg)
+		if coordCfgPath == "" {
+			return nil, fmt.Errorf("required flag \"%v\" not set", flagCoordCfg)
+		}
+		coordCfg, err := config.LoadCoordinator(coordCfgPath)
+		if err != nil {
+			return nil, err
+		}
+		cfg.coord = coordCfg
+	}
+	nodeCfgPath := c.String(flagCfg)
+	if nodeCfgPath == "" {
+		return nil, fmt.Errorf("required flag \"%v\" not set", flagCfg)
+	}
+	nodeCfg, err := config.LoadNode(nodeCfgPath)
+	if err != nil {
+		return nil, err
+	}
+	cfg.node = nodeCfg
+
+	return &cfg, nil
+}
+
+func main() {
+	app := cli.NewApp()
+	app.Name = "hermez-node"
+	app.Version = "0.1.0-alpha"
+	app.Flags = []cli.Flag{
+		&cli.StringFlag{
+			Name:     flagMode,
+			Usage:    fmt.Sprintf("Set node `MODE` (can be \"%v\" or \"%v\")", modeSync, modeCoord),
+			Required: true,
+		},
+		&cli.StringFlag{
+			Name:     flagCfg,
+			Usage:    "Node configuration `FILE`",
+			Required: true,
+		},
+		&cli.StringFlag{
+			Name:  flagCoordCfg,
+			Usage: "Coordinator configuration `FILE`",
+		},
+	}
+
+	app.Commands = []*cli.Command{
+		{
+			Name:    "init",
+			Aliases: []string{},
+			Usage:   "Initialize the hermez-node",
+			Action:  cmdInit,
+		},
+		{
+			Name:    "run",
+			Aliases: []string{},
+			Usage:   "Run the hermez-node in the indicated mode",
+			Action:  cmdRun,
+		},
+	}
+
+	err := app.Run(os.Args)
+	if err != nil {
+		fmt.Printf("\nError: %v\n", err)
+		os.Exit(1)
+	}
+}

common/accountcreationauths.go

@@ -12,5 +12,5 @@ type AccountCreationAuth struct {
 	Timestamp time.Time
 	EthAddr   ethCommon.Address
 	BJJ       babyjub.PublicKey
-	Signature babyjub.Signature
+	Signature []byte
 }

config/config.go

@@ -0,0 +1,101 @@
+package config
+
+import (
+	"fmt"
+	"io/ioutil"
+	"time"
+
+	"github.com/BurntSushi/toml"
+	ethCommon "github.com/ethereum/go-ethereum/common"
+	"gopkg.in/go-playground/validator.v9"
+)
+
+// Duration is a wrapper type that parses time duration from text.
+type Duration struct {
+	time.Duration
+}
+
+// UnmarshalText unmarshalls time duration from text.
+func (d *Duration) UnmarshalText(data []byte) error {
+	duration, err := time.ParseDuration(string(data))
+	if err != nil {
+		return err
+	}
+	d.Duration = duration
+	return nil
+}
+
+// Coordinator is the coordinator specific configuration.
+type Coordinator struct {
+	ForgerAddress     ethCommon.Address `validate:"required"`
+	ForgeLoopInterval Duration          `validate:"required"`
+}
+
+// Node is the hermez node configuration.
+type Node struct {
+	StateDB struct {
+		Path string
+	} `validate:"required"`
+	PostgreSQL struct {
+		Port     int    `validate:"required"`
+		Host     string `validate:"required"`
+		User     string `validate:"required"`
+		Password string `validate:"required"`
+	} `validate:"required"`
+	L2DB struct {
+		Name         string   `validate:"required"`
+		SafetyPeriod uint16   `validate:"required"`
+		MaxTxs       uint32   `validate:"required"`
+		TTL          Duration `validate:"required"`
+	} `validate:"required"`
+	HistoryDB struct {
+		Name string `validate:"required"`
+	} `validate:"required"`
+	Web3 struct {
+		URL string `validate:"required"`
+	} `validate:"required"`
+	TxSelector struct {
+		Path string `validate:"required"`
+	} `validate:"required"`
+	BatchBuilder struct {
+		Path string `validate:"required"`
+	} `validate:"required"`
+	Synchronizer struct {
+		SyncLoopInterval Duration `validate:"required"`
+	} `validate:"required"`
+}
+
+// Load loads a generic config.
+func Load(path string, cfg interface{}) error {
+	bs, err := ioutil.ReadFile(path) //nolint:gosec
+	if err != nil {
+		return err
+	}
+	cfgToml := string(bs)
+	if _, err := toml.Decode(cfgToml, cfg); err != nil {
+		return err
+	}
+	validate := validator.New()
+	if err := validate.Struct(cfg); err != nil {
+		return fmt.Errorf("error validating configuration file: %w", err)
+	}
+	return nil
+}
+
+// LoadCoordinator loads the Coordinator configuration from path.
+func LoadCoordinator(path string) (*Coordinator, error) {
+	var cfg Coordinator
+	if err := Load(path, &cfg); err != nil {
+		return nil, fmt.Errorf("error loading coordinator configuration file: %w", err)
+	}
+	return &cfg, nil
+}
+
+// LoadNode loads the Node configuration from path.
+func LoadNode(path string) (*Node, error) {
+	var cfg Node
+	if err := Load(path, &cfg); err != nil {
+		return nil, fmt.Errorf("error loading node configuration file: %w", err)
+	}
+	return &cfg, nil
+}

coordinator/batch.go

@@ -4,7 +4,7 @@ import (
 	"github.com/hermeznetwork/hermez-node/common"
 )
 
-// Proof TBD this type will be got from the proof server
+// Proof TBD this type will be received from the proof server
 type Proof struct {
 }
 

coordinator/coordinator.go

@@ -1,7 +1,7 @@
 package coordinator
 
 import (
-	"time"
+	"fmt"
 
 	ethCommon "github.com/ethereum/go-ethereum/common"
 	"github.com/hermeznetwork/hermez-node/batchbuilder"
@@ -14,25 +14,23 @@ import (
 	"github.com/iden3/go-merkletree/db/memory"
 )
 
+// ErrStop is returned when the function is stopped asynchronously via the stop
+// channel.  It doesn't indicate an error.
+var ErrStop = fmt.Errorf("Stopped")
+
 // Config contains the Coordinator configuration
 type Config struct {
 	ForgerAddress ethCommon.Address
-	LoopInterval  time.Duration
 }
 
 // Coordinator implements the Coordinator type
 type Coordinator struct {
-	// m            sync.Mutex
-	stopch       chan bool
-	stopforgerch chan bool
-
 	forging    bool
 	isForgeSeq bool // WIP just for testing while implementing
 
 	config Config
 
 	batchNum        common.BatchNum
-	batchQueue      *BatchQueue
 	serverProofPool ServerProofPool
 
 	// synchronizer *synchronizer.Synchronizer
@@ -61,123 +59,102 @@ func NewCoordinator(conf Config,
 	return &c
 }
 
-// Stop stops the Coordinator
-func (c *Coordinator) Stop() {
-	log.Info("Stopping Coordinator")
-	c.stopch <- true
-}
-
-// Start starts the Coordinator service
-func (c *Coordinator) Start() {
-	c.stopch = make(chan bool) // initialize channel
-	go func() {
-		log.Info("Starting Coordinator")
-		for {
-			select {
-			case <-c.stopch:
-				close(c.stopforgerch)
-				log.Info("Coordinator stopped")
-				return
-			case <-time.After(c.config.LoopInterval):
-				if !c.isForgeSequence() {
-					if c.forging {
-						log.Info("forging stopped")
-						c.forging = false
-						close(c.stopforgerch)
-					}
-					log.Debug("not in forge time")
-					continue
-				}
-				if !c.forging {
-					log.Info("Start Forging")
-					// c.batchNum = c.hdb.GetLastBatchNum() // uncomment when HistoryDB is ready
-					err := c.txsel.Reset(c.batchNum)
-					if err != nil {
-						log.Error("forging err: ", err)
-					}
-					err = c.batchBuilder.Reset(c.batchNum, true)
-					if err != nil {
-						log.Error("forging err: ", err)
-					}
-					c.batchQueue = NewBatchQueue()
-
-					c.forgerLoop()
-					c.forging = true
-				}
-			}
+// ForgeLoopFn is the function ran in a loop that checks if it's time to forge
+// and forges a batch if so and sends it to outBatchCh.  Returns true if it's
+// the coordinator turn to forge.
+func (c *Coordinator) ForgeLoopFn(outBatchCh chan *BatchInfo, stopCh chan bool) (bool, error) {
+	if !c.isForgeSequence() {
+		if c.forging {
+			log.Info("stop forging")
+			c.forging = false
 		}
-	}()
-}
-
-// forgerLoop trigers goroutines for:
-// - forgeSequence
-// - proveSequence
-// - forgeConfirmationSequence
-func (c *Coordinator) forgerLoop() {
-	c.stopforgerch = make(chan bool) // initialize channel
-
-	go func() {
-		log.Info("forgeSequence started")
-		for {
-			select {
-			case <-c.stopforgerch:
-				log.Info("forgeSequence stopped")
-				return
-			case <-time.After(c.config.LoopInterval):
-				if err := c.forgeSequence(); err != nil {
-					log.Error("forgeSequence err: ", err)
-				}
-			}
+		log.Debug("not in forge time")
+		return false, nil
+	}
+	log.Debug("forge time")
+	if !c.forging {
+		log.Info("start forging")
+		// c.batchNum = c.hdb.GetLastBatchNum() // uncomment when HistoryDB is ready
+		err := c.txsel.Reset(c.batchNum)
+		if err != nil {
+			log.Errorw("TxSelector.Reset", "error", err)
+			return true, err
 		}
-	}()
-	go func() {
-		log.Info("proveSequence started")
-		for {
-			select {
-			case <-c.stopforgerch:
-				log.Info("proveSequence stopped")
-				return
-			case <-time.After(c.config.LoopInterval):
-				if err := c.proveSequence(); err != nil && err != common.ErrBatchQueueEmpty {
-					log.Error("proveSequence err: ", err)
-				}
-			}
+		err = c.batchBuilder.Reset(c.batchNum, true)
+		if err != nil {
+			log.Errorw("BatchBuilder.Reset", "error", err)
+			return true, err
 		}
-	}()
-	go func() {
-		log.Info("forgeConfirmationSequence started")
-		for {
-			select {
-			case <-c.stopforgerch:
-				log.Info("forgeConfirmationSequence stopped")
-				return
-			case <-time.After(c.config.LoopInterval):
-				if err := c.forgeConfirmationSequence(); err != nil {
-					log.Error("forgeConfirmationSequence err: ", err)
-				}
-			}
-		}
-	}()
-}
-
-// forgeSequence
-func (c *Coordinator) forgeSequence() error {
+		// c.batchQueue = NewBatchQueue()
+		c.forging = true
+	}
 	// TODO once synchronizer has this method ready:
 	// If there's been a reorg, handle it
 	// handleReorg() function decides if the reorg must restart the pipeline or not
 	// if c.synchronizer.Reorg():
 	_ = c.handleReorg()
 
-	// 0. If there's an available server proof: Start pipeline for batchNum = batchNum + 1
-	serverProofInfo, err := c.serverProofPool.GetNextAvailable() // blocking call, returns when a server proof is available
+	// 0. If there's an available server proof: Start pipeline for batchNum = batchNum + 1.
+	// non-blocking call, returns nil if a server proof is
+	// not available, or non-nil otherwise.
+	serverProofInfo, err := c.serverProofPool.GetNextAvailable(stopCh)
 	if err != nil {
-		return err
+		return true, err
 	}
 
-	// remove transactions from the pool that have been there for too long
-	err = c.purgeRemoveByTimeout()
+	log.Debugw("start forge")
+	batchInfo, err := c.forge(serverProofInfo)
 	if err != nil {
-		return err
+		log.Errorw("forge", "error", err)
+		return true, err
+	}
+	log.Debugw("end forge", "batchNum", batchInfo.batchNum)
+	outBatchCh <- batchInfo
+	return true, nil
+}
+
+// GetProofCallForgeLoopFn is the function ran in a loop that gets a forged
+// batch via inBatchCh, waits for the proof server to finish, calls the ForgeBatch
+// function in the Rollup Smart Contract, and sends the batch to outBatchCh.
+func (c *Coordinator) GetProofCallForgeLoopFn(inBatchCh, outBatchCh chan *BatchInfo, stopCh chan bool) error {
+	select {
+	case <-stopCh:
+		log.Info("forgeLoopFn stopped")
+		return ErrStop
+	case batchInfo := <-inBatchCh:
+		log.Debugw("start getProofCallForge", "batchNum", batchInfo.batchNum)
+		if err := c.getProofCallForge(batchInfo); err != nil {
+			return err
+		}
+		log.Debugw("end getProofCallForge", "batchNum", batchInfo.batchNum)
+		outBatchCh <- batchInfo
+	}
+	return nil
+}
+
+// ForgeCallConfirmLoopFn is the function ran in a loop that gets a batch that
+// has been sent to the Rollup Smart Contract via inBatchCh and waits for the
+// ethereum transaction confirmation.
+func (c *Coordinator) ForgeCallConfirmLoopFn(inBatchCh chan *BatchInfo, stopCh chan bool) error {
+	select {
+	case <-stopCh:
+		log.Info("forgeConfirmLoopFn stopped")
+		return ErrStop
+	case batchInfo := <-inBatchCh:
+		log.Debugw("start forgeCallConfirm", "batchNum", batchInfo.batchNum)
+		if err := c.forgeCallConfirm(batchInfo); err != nil {
+			return err
+		}
+		log.Debugw("end forgeCallConfirm", "batchNum", batchInfo.batchNum)
+	}
+	return nil
+}
+
+func (c *Coordinator) forge(serverProofInfo *ServerProofInfo) (*BatchInfo, error) {
+	// remove transactions from the pool that have been there for too long
+	err := c.purgeRemoveByTimeout()
+	if err != nil {
+		return nil, err
 	}
 
 	c.batchNum = c.batchNum + 1
@@ -193,13 +170,13 @@ func (c *Coordinator) forgeSequence() error {
 		var l1UserTxs []*common.L1Tx = nil                                                                // tmp, depends on HistoryDB
 		l1UserTxsExtra, l1OperatorTxs, poolL2Txs, err = c.txsel.GetL1L2TxSelection(c.batchNum, l1UserTxs) // TODO once feesInfo is added to method return, add the var
 		if err != nil {
-			return err
+			return nil, err
 		}
 	} else {
 		// 2b: only L2 txs
 		poolL2Txs, err = c.txsel.GetL2TxSelection(c.batchNum) // TODO once feesInfo is added to method return, add the var
 		if err != nil {
-			return err
+			return nil, err
 		}
 		l1UserTxsExtra = nil
 		l1OperatorTxs = nil
@@ -211,7 +188,7 @@ func (c *Coordinator) forgeSequence() error {
 	// all the nonces smaller than the current one)
 	err = c.purgeInvalidDueToL2TxsSelection(poolL2Txs)
 	if err != nil {
-		return err
+		return nil, err
 	}
 
 	// 3.  Save metadata from TxSelector output for BatchNum
@@ -224,31 +201,23 @@ func (c *Coordinator) forgeSequence() error {
 	l2Txs := common.PoolL2TxsToL2Txs(poolL2Txs)
 	zkInputs, err := c.batchBuilder.BuildBatch(configBatch, l1UserTxsExtra, l1OperatorTxs, l2Txs, nil) // TODO []common.TokenID --> feesInfo
 	if err != nil {
-		return err
+		return nil, err
 	}
 
 	// 5. Save metadata from BatchBuilder output for BatchNum
 	batchInfo.SetZKInputs(zkInputs)
-	log.Debugf("Batch builded, batchNum: %d ", c.batchNum)
 
 	// 6. Call an idle server proof with BatchBuilder output, save server proof info for batchNum
 	err = batchInfo.serverProof.CalculateProof(zkInputs)
 	if err != nil {
-		return err
+		return nil, err
 	}
-	c.batchQueue.Push(&batchInfo)
 
-	return nil
+	return &batchInfo, nil
 }
 
-// proveSequence gets the generated zkProof & sends it to the SmartContract
-func (c *Coordinator) proveSequence() error {
-	batchInfo := c.batchQueue.Pop()
-	if batchInfo == nil {
-		// no batches in queue, return
-		log.Debug("not batch to prove yet")
-		return common.ErrBatchQueueEmpty
-	}
+// getProofCallForge gets the generated zkProof & sends it to the SmartContract
+func (c *Coordinator) getProofCallForge(batchInfo *BatchInfo) error {
 	serverProofInfo := batchInfo.serverProof
 	proof, err := serverProofInfo.GetProof() // blocking call, until not resolved don't continue. Returns when the proof server has calculated the proof
 	if err != nil {
@@ -276,7 +245,7 @@ func (c *Coordinator) proveSequence() error {
 	return nil
 }
 
-func (c *Coordinator) forgeConfirmationSequence() error {
+func (c *Coordinator) forgeCallConfirm(batchInfo *BatchInfo) error {
 	// TODO strategy of this sequence TBD
 	// confirm eth txs and mark them as accepted sequence
 	// ethTx := ethTxStore.GetFirstPending()

coordinator/coordinator_test.go

@@ -44,34 +44,110 @@ func newTestModules(t *testing.T) (*txselector.TxSelector, *batchbuilder.BatchBu
 	return txsel, bb
 }
 
+// CoordNode is an example of a Node that handles the goroutines for the coordinator
+type CoordNode struct {
+	c                     *Coordinator
+	stopForge             chan bool
+	stopGetProofCallForge chan bool
+	stopForgeCallConfirm  chan bool
+}
+
+func NewCoordNode(c *Coordinator) *CoordNode {
+	return &CoordNode{
+		c: c,
+	}
+}
+
+func (cn *CoordNode) Start() {
+	log.Debugw("Starting CoordNode...")
+	cn.stopForge = make(chan bool)
+	cn.stopGetProofCallForge = make(chan bool)
+	cn.stopForgeCallConfirm = make(chan bool)
+	batchCh0 := make(chan *BatchInfo)
+	batchCh1 := make(chan *BatchInfo)
+
+	go func() {
+		for {
+			select {
+			case <-cn.stopForge:
+				return
+			default:
+				if forge, err := cn.c.ForgeLoopFn(batchCh0, cn.stopForge); err == ErrStop {
+					return
+				} else if err != nil {
+					log.Errorw("CoordNode ForgeLoopFn", "error", err)
+				} else if !forge {
+					time.Sleep(500 * time.Millisecond)
+				}
+			}
+		}
+	}()
+	go func() {
+		for {
+			select {
+			case <-cn.stopGetProofCallForge:
+				return
+			default:
+				if err := cn.c.GetProofCallForgeLoopFn(
+					batchCh0, batchCh1, cn.stopGetProofCallForge); err == ErrStop {
+					return
+				} else if err != nil {
+					log.Errorw("CoordNode GetProofCallForgeLoopFn", "error", err)
+				}
+			}
+		}
+	}()
+	go func() {
+		for {
+			select {
+			case <-cn.stopForgeCallConfirm:
+				return
+			default:
+				if err := cn.c.ForgeCallConfirmLoopFn(
+					batchCh1, cn.stopForgeCallConfirm); err == ErrStop {
+					return
+				} else if err != nil {
+					log.Errorw("CoordNode ForgeCallConfirmLoopFn", "error", err)
+				}
+			}
+		}
+	}()
+}
+
+func (cn *CoordNode) Stop() {
+	log.Debugw("Stopping CoordNode...")
+	cn.stopForge <- true
+	cn.stopGetProofCallForge <- true
+	cn.stopForgeCallConfirm <- true
+}
+
 func TestCoordinator(t *testing.T) {
 	txsel, bb := newTestModules(t)
 
-	conf := Config{
-		LoopInterval: 100 * time.Millisecond,
-	}
+	conf := Config{}
 	hdb := &historydb.HistoryDB{}
 	c := NewCoordinator(conf, hdb, txsel, bb, &eth.Client{})
-	c.Start()
+	cn := NewCoordNode(c)
+	cn.Start()
 	time.Sleep(1 * time.Second)
 
 	// simulate forgeSequence time
-	log.Debug("simulate entering in forge time")
+	log.Info("simulate entering in forge time")
 	c.isForgeSeq = true
 	time.Sleep(1 * time.Second)
 
 	// simulate going out from forgeSequence
-	log.Debug("simulate going out from forge time")
+	log.Info("simulate going out from forge time")
 	c.isForgeSeq = false
 	time.Sleep(1 * time.Second)
 
 	// simulate entering forgeSequence time again
-	log.Debug("simulate entering in forge time again")
+	log.Info("simulate entering in forge time again")
 	c.isForgeSeq = true
 	time.Sleep(1 * time.Second)
 
 	// simulate stopping forgerLoop by channel
-	log.Debug("simulate stopping forgerLoop by closing coordinator stopch")
-	c.Stop()
+	log.Info("simulate stopping forgerLoop by closing coordinator stopch")
+	cn.Stop()
 	time.Sleep(1 * time.Second)
 }

coordinator/proofpool.go

@@ -1,6 +1,9 @@
 package coordinator
 
-import "github.com/hermeznetwork/hermez-node/common"
+import (
+	"github.com/hermeznetwork/hermez-node/common"
+	"github.com/hermeznetwork/hermez-node/log"
+)
 
 // ServerProofInfo contains the data related to a ServerProof
 type ServerProofInfo struct {
@@ -25,6 +28,12 @@ type ServerProofPool struct {
 }
 
 // GetNextAvailable returns the available ServerProofInfo
-func (p *ServerProofPool) GetNextAvailable() (*ServerProofInfo, error) {
+func (p *ServerProofPool) GetNextAvailable(stopCh chan bool) (*ServerProofInfo, error) {
+	select {
+	case <-stopCh:
+		log.Info("ServerProofPool.GetNextAvailable stopped")
+		return nil, ErrStop
+	default:
+	}
 	return nil, nil
 }

eth/rollup.go

@@ -149,15 +149,16 @@ func NewRollupEvents() RollupEvents {
 // RollupForgeBatchArgs are the arguments to the ForgeBatch function in the Rollup Smart Contract
 //nolint:structcheck,unused
 type RollupForgeBatchArgs struct {
-	ProofA            [2]*big.Int
-	ProofB            [2][2]*big.Int
-	ProofC            [2]*big.Int
-	NewLastIdx        int64
-	NewStRoot         *big.Int
-	NewExitRoot       *big.Int
-	L1CoordinatorTxs  []*common.L1Tx
-	L2Txs             []*common.L2Tx
-	FeeIdxCoordinator []common.Idx
+	ProofA                [2]*big.Int
+	ProofB                [2][2]*big.Int
+	ProofC                [2]*big.Int
+	NewLastIdx            int64
+	NewStRoot             *big.Int
+	NewExitRoot           *big.Int
+	L1CoordinatorTxs      []*common.L1Tx
+	L1CoordinatorTxsAuths [][]byte // Authorization for accountCreations for each L1CoordinatorTxs
+	L2Txs                 []*common.L2Tx
+	FeeIdxCoordinator     []common.Idx
 	// Circuit selector
 	VerifierIdx int64
 	L1Batch     bool

go.mod

@@ -3,6 +3,7 @@ module github.com/hermeznetwork/hermez-node
 go 1.14
 
 require (
+	github.com/BurntSushi/toml v0.3.1
 	github.com/dghubble/sling v1.3.0
 	github.com/ethereum/go-ethereum v1.9.17
 	github.com/go-sql-driver/mysql v1.5.0 // indirect
@@ -17,5 +18,8 @@ require (
 	github.com/rubenv/sql-migrate v0.0.0-20200616145509-8d140a17f351
 	github.com/russross/meddler v1.0.0
 	github.com/stretchr/testify v1.6.1
+	github.com/urfave/cli v1.22.1
+	github.com/urfave/cli/v2 v2.2.0
 	go.uber.org/zap v1.13.0
+	gopkg.in/go-playground/validator.v9 v9.29.1
 )

go.sum

@@ -14,6 +14,7 @@ github.com/Azure/go-autorest/autorest/mocks v0.2.0/go.mod h1:OTyCOPRA2IgIlWxVYxB
 github.com/Azure/go-autorest/autorest/mocks v0.3.0/go.mod h1:a8FDP3DYzQ4RYfVAxAN3SVSiiO77gL2j2ronKKP0syM=
 github.com/Azure/go-autorest/logger v0.1.0/go.mod h1:oExouG+K6PryycPJfVSxi/koC6LSNgds39diKLz7Vrc=
 github.com/Azure/go-autorest/tracing v0.5.0/go.mod h1:r/s2XiOKccPW3HrqB+W0TQzfbtp2fGCgRFtBroKn4Dk=
+github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
 github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
 github.com/Knetic/govaluate v3.0.1-0.20171022003610-9aa49832a739+incompatible/go.mod h1:r7JcOSlj0wfOMncg0iLm8Leh48TZaKVeNIfJntJ2wa0=
@@ -102,8 +103,10 @@ github.com/coreos/go-systemd v0.0.0-20180511133405-39ca1b05acc7/go.mod h1:F5haX7
 github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e/go.mod h1:F5haX7vjVVG0kc13fIWeqUViNPyEJxv/OmvnBo0Yme4=
 github.com/coreos/pkg v0.0.0-20160727233714-3ac0863d7acf/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=
 github.com/coreos/pkg v0.0.0-20180928190104-399ea9e2e55f/go.mod h1:E3G3o1h8I7cfcXa63jLwjI0eiQQMgzzUDFVpN/nH/eA=
+github.com/cpuguy83/go-md2man v1.0.10 h1:BSKMNlYxDvnunlTymqtgONjNnaRV1sTpcovwwjF22jk=
 github.com/cpuguy83/go-md2man v1.0.10/go.mod h1:SmD6nW6nTyfqj6ABTjUi3V3JVMnlJmwcJI5acqYI6dE=
 github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
+github.com/cpuguy83/go-md2man/v2 v2.0.0 h1:EoUDS0afbrsXAZ9YQ9jdu/mZ2sXgT1/2yyNng4PGlyM=
 github.com/cpuguy83/go-md2man/v2 v2.0.0/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
 github.com/creack/pty v1.1.7/go.mod h1:lj5s0c3V2DBrqTV7llrYr5NG6My20zk30Fl46Y7DoTY=
 github.com/davecgh/go-spew v0.0.0-20171005155431-ecdeabc65495/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -170,7 +173,9 @@ github.com/go-logfmt/logfmt v0.3.0/go.mod h1:Qt1PoO58o5twSAckw1HlFXLmHsOX5/0LbT9
 github.com/go-logfmt/logfmt v0.4.0/go.mod h1:3RMwSq7FuexP4Kalkev3ejPJsZTpXXBr9+V4qmtdjCk=
 github.com/go-logfmt/logfmt v0.5.0/go.mod h1:wCYkCAKZfumFQihp8CzCvQ3paCTfi41vtzG1KdI/P7A=
 github.com/go-ole/go-ole v1.2.1/go.mod h1:7FAglXiTm7HKlQRDeOQ6ZNUHidzCWXuZWq/1dTyBNF8=
+github.com/go-playground/locales v0.12.1 h1:2FITxuFt/xuCNP1Acdhv62OzaCiviiE4kotfhkmOqEc=
 github.com/go-playground/locales v0.12.1/go.mod h1:IUMDtCfWo/w/mtMfIE/IG2K+Ey3ygWanZIBtBW0W2TM=
+github.com/go-playground/universal-translator v0.16.0 h1:X++omBR/4cE2MNg91AoC3rmGrCjJ8eAeUP/K/EKx4DM=
 github.com/go-playground/universal-translator v0.16.0/go.mod h1:1AnU7NaIRDWWzGEKwgtJRd2xk99HeFyHw3yid4rvQIY=
 github.com/go-sourcemap/sourcemap v2.1.2+incompatible/go.mod h1:F8jJfvm2KbVjc5NqelyYJmf/v5J0dwNLS2mL4sNA1Jg=
 github.com/go-sql-driver/mysql v1.4.0/go.mod h1:zAC/RDZ24gD3HViQzih4MyKcchzm+sOG5ZlKdlhCg5w=
@@ -358,6 +363,7 @@ github.com/kr/pty v1.1.8/go.mod h1:O1sed60cT9XZ5uDucP5qwvh+TE3NnUj51EiZO/lmSfw=
 github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 github.com/kylelemons/godebug v1.1.0/go.mod h1:9/0rRGxNHcop5bhtWyNeEfOS8JIWk580+fNqagV/RAw=
+github.com/leodido/go-urn v1.1.0 h1:Sm1gr51B1kKyfD2BlRcLSiEkffoG96g6TPv6eRoEiB8=
 github.com/leodido/go-urn v1.1.0/go.mod h1:+cyI34gQWZcE1eQU7NVgKkkzdXDQHr1dBMtdAPozLkw=
 github.com/lib/pq v1.0.0/go.mod h1:5WUZQaWbwv1U+lTReE5YruASi9Al49XbQIvNi/34Woo=
 github.com/lib/pq v1.1.1/go.mod h1:5WUZQaWbwv1U+lTReE5YruASi9Al49XbQIvNi/34Woo=
@@ -507,7 +513,9 @@ github.com/rs/cors v1.6.0/go.mod h1:gFx+x8UowdsKA9AchylcLynDq+nNFfI8FkUZdN/jGCU=
 github.com/rs/xhandler v0.0.0-20160618193221-ed27b6fd6521/go.mod h1:RvLn4FgxWubrpZHtQLnOf6EwhN2hEMusxZOhcW9H3UQ=
 github.com/rubenv/sql-migrate v0.0.0-20200616145509-8d140a17f351 h1:HXr/qUllAWv9riaI4zh2eXWKmCSDqVS/XH1MRHLKRwk=
 github.com/rubenv/sql-migrate v0.0.0-20200616145509-8d140a17f351/go.mod h1:DCgfY80j8GYL7MLEfvcpSFvjD0L5yZq/aZUJmhZklyg=
+github.com/russross/blackfriday v1.5.2 h1:HyvC0ARfnZBqnXwABFeSZHpKvJHJJfPz81GNueLj0oo=
 github.com/russross/blackfriday v1.5.2/go.mod h1:JO/DiYxRf+HjHt06OyowR9PTA263kcR/rfWxYHBV53g=
+github.com/russross/blackfriday/v2 v2.0.1 h1:lPqVAte+HuHNfhJ/0LC98ESWRz8afy9tM/0RK8m9o+Q=
 github.com/russross/blackfriday/v2 v2.0.1/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
 github.com/russross/meddler v1.0.0 h1:3HgwIot/NsCrLrmorjSO7JhzoshoSVfuqgFgZ0VTbro=
 github.com/russross/meddler v1.0.0/go.mod h1:j75NzzcOL4CGy+pPKykxZoT/At5Qj4ZnRRs1PXxweZI=
@@ -517,6 +525,7 @@ github.com/sean-/seed v0.0.0-20170313163322-e2103e2c3529/go.mod h1:DxrIzT+xaE7yg
 github.com/sergi/go-diff v1.0.0/go.mod h1:0CfEIISq7TuYL3j771MWULgwwjU+GofnZX9QAmXWZgo=
 github.com/shirou/gopsutil v2.20.5+incompatible h1:tYH07UPoQt0OCQdgWWMgYHy3/a9bcxNpBIysykNIP7I=
 github.com/shirou/gopsutil v2.20.5+incompatible/go.mod h1:5b4v6he4MtMOwMlS0TUMTu2PcXUg8+E1lC7eC3UO/RA=
+github.com/shurcooL/sanitized_anchor_name v1.0.0 h1:PdmoCO6wvbs+7yrJyMORt4/BmY5IYyJwS/kOiWx8mHo=
 github.com/shurcooL/sanitized_anchor_name v1.0.0/go.mod h1:1NzhyTcUVG4SuEtjjoZeVRXNmyL/1OwPU0+IJeTBvfc=
 github.com/siddontang/go v0.0.0-20180604090527-bdc77568d726/go.mod h1:3yhqj7WBBfRhbBlzyOC3gUxftwsU0u8gqevxwIHQpMw=
 github.com/sirupsen/logrus v1.2.0/go.mod h1:LxeOpSwHxABJmUn/MG1IvRgCAasNZTLOkJPxbbu5VWo=
@@ -570,7 +579,11 @@ github.com/tyler-smith/go-bip39 v1.0.2/go.mod h1:sJ5fKU0s6JVwZjjcUEX2zFOnvq0ASQ2
 github.com/ugorji/go v1.1.4/go.mod h1:uQMGLiO92mf5W77hV/PUCpI3pbzQx3CRekS0kk+RGrc=
 github.com/ugorji/go/codec v0.0.0-20181204163529-d75b2dcb6bc8/go.mod h1:VFNgLljTbGfSG7qAOspJ7OScBnGdDN/yBr0sguwnwf0=
 github.com/urfave/cli v1.20.0/go.mod h1:70zkFmudgCuE/ngEzBv17Jvp/497gISqfk5gWijbERA=
+github.com/urfave/cli v1.22.1 h1:+mkCCcOFKPnCmVYVcURKps1Xe+3zP90gSYGNfRkjoIY=
 github.com/urfave/cli v1.22.1/go.mod h1:Gos4lmkARVdJ6EkW0WaNv/tZAAMe9V7XWyB60NtXRu0=
+github.com/urfave/cli v1.22.4 h1:u7tSpNPPswAFymm8IehJhy4uJMlUuU/GmqSkvJ1InXA=
+github.com/urfave/cli/v2 v2.2.0 h1:JTTnM6wKzdA0Jqodd966MVj4vWbbquZykeX1sKbe2C4=
+github.com/urfave/cli/v2 v2.2.0/go.mod h1:SE9GqnLQmjVa0iPEY0f1w3ygNIYcIJ0OKPMoW2caLfQ=
 github.com/wsddn/go-ecdh v0.0.0-20161211032359-48726bab9208 h1:1cngl9mPEoITZG8s8cVcUy5CeIBYhEESkOB7m6Gmkrk=
 github.com/wsddn/go-ecdh v0.0.0-20161211032359-48726bab9208/go.mod h1:IotVbo4F+mw0EzQ08zFqg7pK3FebNXpaMsRy2RT+Ees=
 github.com/xanzy/ssh-agent v0.2.1/go.mod h1:mLlQY/MoOhWBj+gOGMQkOeiEvkx+8pJSI+0Bx9h2kr4=
@@ -755,6 +768,7 @@ gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMy
 gopkg.in/gcfg.v1 v1.2.3/go.mod h1:yesOnuUOFQAhST5vPY4nbZsb/huCgGGXlipJsBn0b3o=
 gopkg.in/go-playground/assert.v1 v1.2.1/go.mod h1:9RXL0bg/zibRAgZUYszZSwO/z8Y/a8bDuhia5mkpMnE=
 gopkg.in/go-playground/validator.v8 v8.18.2/go.mod h1:RX2a/7Ha8BgOhfk7j780h4/u/RRjR0eouCJSH80/M2Y=
+gopkg.in/go-playground/validator.v9 v9.29.1 h1:SvGtYmN60a5CVKTOzMSyfzWDeZRxRuGvRQyEAKbw1xc=
 gopkg.in/go-playground/validator.v9 v9.29.1/go.mod h1:+c9/zcJMFNgbLvly1L1V+PpxWdVbfP1avr/N00E2vyQ=
 gopkg.in/gorp.v1 v1.7.2 h1:j3DWlAyGVv8whO7AcIWznQ2Yj7yJkn34B8s63GViAAw=
 gopkg.in/gorp.v1 v1.7.2/go.mod h1:Wo3h+DBQZIxATwftsglhdD/62zRFPhGhTiu5jUJmCaw=

node/node.go

@@ -1,13 +1,251 @@
 package node
 
-type mode string
+import (
+	"time"
 
-// ModeCoordinator defines the mode of the HermezNode as Coordinator, which
-// means that the node is set to forge (which also will be synchronizing with
-// the L1 blockchain state)
-const ModeCoordinator mode = "coordinator"
+	"github.com/ethereum/go-ethereum/ethclient"
+	"github.com/hermeznetwork/hermez-node/batchbuilder"
+	"github.com/hermeznetwork/hermez-node/config"
+	"github.com/hermeznetwork/hermez-node/coordinator"
+	"github.com/hermeznetwork/hermez-node/db/historydb"
+	"github.com/hermeznetwork/hermez-node/db/l2db"
+	"github.com/hermeznetwork/hermez-node/db/statedb"
+	"github.com/hermeznetwork/hermez-node/eth"
+	"github.com/hermeznetwork/hermez-node/log"
+	"github.com/hermeznetwork/hermez-node/synchronizer"
+	"github.com/hermeznetwork/hermez-node/txselector"
+)
 
-// ModeSynchronizer defines the mode of the HermezNode as Synchronizer, which
-// means that the node is set to only synchronize with the L1 blockchain state
-// and will not forge
-const ModeSynchronizer mode = "synchronizer"
+// Mode sets the working mode of the node (synchronizer or coordinator)
+type Mode string
+
+const (
+	// ModeCoordinator defines the mode of the HermezNode as Coordinator, which
+	// means that the node is set to forge (which also will be synchronizing with
+	// the L1 blockchain state)
+	ModeCoordinator Mode = "coordinator"
+
+	// ModeSynchronizer defines the mode of the HermezNode as Synchronizer, which
+	// means that the node is set to only synchronize with the L1 blockchain state
+	// and will not forge
+	ModeSynchronizer Mode = "synchronizer"
+)
+
+// Node is the Hermez Node
+type Node struct {
+	// Coordinator
+	coord                    *coordinator.Coordinator
+	coordCfg                 *config.Coordinator
+	stopForge                chan bool
+	stopGetProofCallForge    chan bool
+	stopForgeCallConfirm     chan bool
+	stoppedForge             chan bool
+	stoppedGetProofCallForge chan bool
+	stoppedForgeCallConfirm  chan bool
+
+	// Synchronizer
+	sync        *synchronizer.Synchronizer
+	stopSync    chan bool
+	stoppedSync chan bool
+
+	// General
+	cfg  *config.Node
+	mode Mode
+}
+
+// NewNode creates a Node
+func NewNode(mode Mode, cfg *config.Node, coordCfg *config.Coordinator) (*Node, error) {
+	historyDB, err := historydb.NewHistoryDB(
+		cfg.PostgreSQL.Port,
+		cfg.PostgreSQL.Host,
+		cfg.PostgreSQL.User,
+		cfg.PostgreSQL.Password,
+		cfg.HistoryDB.Name,
+	)
+	if err != nil {
+		return nil, err
+	}
+
+	stateDB, err := statedb.NewStateDB(cfg.StateDB.Path, true, 32)
+	if err != nil {
+		return nil, err
+	}
+
+	ethClient, err := ethclient.Dial(cfg.Web3.URL)
+	if err != nil {
+		return nil, err
+	}
+	client := eth.NewClient(ethClient, nil, nil, nil)
+
+	sync := synchronizer.NewSynchronizer(client, historyDB, stateDB)
+
+	var coord *coordinator.Coordinator
+	if mode == ModeCoordinator {
+		l2DB, err := l2db.NewL2DB(
+			cfg.PostgreSQL.Port,
+			cfg.PostgreSQL.Host,
+			cfg.PostgreSQL.User,
+			cfg.PostgreSQL.Password,
+			cfg.L2DB.Name,
+			cfg.L2DB.SafetyPeriod,
+			cfg.L2DB.MaxTxs,
+			cfg.L2DB.TTL.Duration,
+		)
+		if err != nil {
+			return nil, err
+		}
+		// TODO: Get (maxL1UserTxs, maxL1OperatorTxs, maxTxs) from the smart contract
+		txSelector, err := txselector.NewTxSelector(cfg.TxSelector.Path, stateDB, l2DB, 10, 10, 10)
+		if err != nil {
+			return nil, err
+		}
+		// TODO: Get (configCircuits []ConfigCircuit, batchNum common.BatchNum, nLevels uint64) from smart contract
+		nLevels := uint64(32) //nolint:gomnd
+		batchBuilder, err := batchbuilder.NewBatchBuilder(cfg.BatchBuilder.Path, stateDB, nil, 0, nLevels)
+		if err != nil {
+			return nil, err
+		}
+		if err != nil {
+			return nil, err
+		}
+		coord = coordinator.NewCoordinator(
+			coordinator.Config{
+				ForgerAddress: coordCfg.ForgerAddress,
+			},
+			historyDB,
+			txSelector,
+			batchBuilder,
+			client,
+		)
+	}
+	return &Node{
+		coord:    coord,
+		coordCfg: coordCfg,
+		sync:     sync,
+		cfg:      cfg,
+		mode:     mode,
+	}, nil
+}
+
+// StartCoordinator starts the coordinator
+func (n *Node) StartCoordinator() {
+	log.Info("Starting Coordinator...")
+
+	n.stopForge = make(chan bool)
+	n.stopGetProofCallForge = make(chan bool)
+	n.stopForgeCallConfirm = make(chan bool)
+
+	n.stoppedForge = make(chan bool)
+	n.stoppedGetProofCallForge = make(chan bool)
+	n.stoppedForgeCallConfirm = make(chan bool)
+
+	batchCh0 := make(chan *coordinator.BatchInfo)
+	batchCh1 := make(chan *coordinator.BatchInfo)
+
+	go func() {
+		defer func() { n.stoppedForge <- true }()
+		for {
+			select {
+			case <-n.stopForge:
+				return
+			default:
+				if forge, err := n.coord.ForgeLoopFn(batchCh0, n.stopForge); err == coordinator.ErrStop {
+					return
+				} else if err != nil {
+					log.Errorw("Coordinator.ForgeLoopFn", "error", err)
+				} else if !forge {
+					time.Sleep(n.coordCfg.ForgeLoopInterval.Duration)
+				}
+			}
+		}
+	}()
+	go func() {
+		defer func() { n.stoppedGetProofCallForge <- true }()
+		for {
+			select {
+			case <-n.stopGetProofCallForge:
+				return
+			default:
+				if err := n.coord.GetProofCallForgeLoopFn(
+					batchCh0, batchCh1, n.stopGetProofCallForge); err == coordinator.ErrStop {
+					return
+				} else if err != nil {
+					log.Errorw("Coordinator.GetProofCallForgeLoopFn", "error", err)
+				}
+			}
+		}
+	}()
+	go func() {
+		defer func() { n.stoppedForgeCallConfirm <- true }()
+		for {
+			select {
+			case <-n.stopForgeCallConfirm:
+				return
+			default:
+				if err := n.coord.ForgeCallConfirmLoopFn(
+					batchCh1, n.stopForgeCallConfirm); err == coordinator.ErrStop {
+					return
+				} else if err != nil {
+					log.Errorw("Coordinator.ForgeCallConfirmLoopFn", "error", err)
+				}
+			}
+		}
+	}()
+}
+
+// StopCoordinator stops the coordinator
+func (n *Node) StopCoordinator() {
+	log.Info("Stopping Coordinator...")
+	n.stopForge <- true
+	n.stopGetProofCallForge <- true
+	n.stopForgeCallConfirm <- true
+	<-n.stoppedForge
+	<-n.stoppedGetProofCallForge
+	<-n.stoppedForgeCallConfirm
+}
+
+// StartSynchronizer starts the synchronizer
+func (n *Node) StartSynchronizer() {
+	log.Info("Starting Synchronizer...")
+	n.stopSync = make(chan bool)
+	n.stoppedSync = make(chan bool)
+	go func() {
+		defer func() { n.stoppedSync <- true }()
+		for {
+			select {
+			case <-n.stopSync:
+				log.Info("Coordinator stopped")
+				return
+			case <-time.After(n.cfg.Synchronizer.SyncLoopInterval.Duration):
+				if err := n.sync.Sync(); err != nil {
+					log.Errorw("Synchronizer.Sync", "error", err)
+				}
+			}
+		}
+	}()
+}
+
+// StopSynchronizer stops the synchronizer
+func (n *Node) StopSynchronizer() {
+	log.Info("Stopping Synchronizer...")
+	n.stopSync <- true
+	<-n.stoppedSync
+}
+
+// Start the node
+func (n *Node) Start() {
+	log.Infow("Starting node...", "mode", n.mode)
+	if n.mode == ModeCoordinator {
+		n.StartCoordinator()
+	}
+	n.StartSynchronizer()
+}
+
+// Stop the node
+func (n *Node) Stop() {
+	log.Infow("Stopping node...")
+	if n.mode == ModeCoordinator {
+		n.StopCoordinator()
+	}
+	n.StopSynchronizer()
+}