Add usePrev flag to bulletin board

.gitignore

@@ -49,4 +49,6 @@ out/*
 
 
 **/prometheus.yml
-**/lastRegisteredClientsRelays.yml
+**/lastRegisteredClientsRelays.yml
+config/lastRegisteredClientsRelays.yml
+internal/model/bulletin_board/metrics/prometheus.yml

cmd/bulletin-board/main.go

@@ -24,6 +24,8 @@ func main() {
 	// Define command-line flags
 	logLevel := flag.String("log-level", "info", "Log level")
 
+	tellNodesToRegister := flag.Bool("usePrev", false, "False by default. If true, the bulletin board will tell all the clients and relays to register again, using the addresses saved from the previous run (lastRegisteredClientsRelays.yml)")
+
 	flag.Usage = func() {
 		if _, err := fmt.Fprintf(flag.CommandLine.Output(), "Usage of %s:\n", os.Args[0]); err != nil {
 			slog.Error("Usage of %s:\n", err, os.Args[0])
@@ -56,7 +58,7 @@ func main() {
 	slog.Info("⚡ init Bulletin board", "url", url)
 
 	// Create a new instance of the Bulletin Board with the current configuration.
-	bulletinBoard = bulletin_board.NewBulletinBoard()
+	bulletinBoard = bulletin_board.NewBulletinBoard(*tellNodesToRegister)
 
 	// Start the Bulletin Board's main operations in a new goroutine
 	go func() {

internal/model/bulletin_board/bulletin_board.go

@@ -18,21 +18,23 @@ import (
 
 // BulletinBoard keeps track of active relays and coordinates the start signal
 type BulletinBoard struct {
-	Network         map[int]*RelayView  // Maps relay IDs to their respective RelayView structs.
-	Clients         map[int]*ClientView // Maps client IDs to their respective ClientView structs.
-	mu              sync.RWMutex        // Mutex for read/write locking
-	lastStartRun    time.Time           // Timestamp of the last start signal sent.
-	timeBetweenRuns time.Duration       // Minimum duration between consecutive start signals.
+	Network             map[int]*RelayView  // Maps relay IDs to their respective RelayView structs.
+	Clients             map[int]*ClientView // Maps client IDs to their respective ClientView structs.
+	mu                  sync.RWMutex        // Mutex for read/write locking
+	lastStartRun        time.Time           // Timestamp of the last start signal sent.
+	timeBetweenRuns     time.Duration       // Minimum duration between consecutive start signals.
+	tellNodesToRegister bool
 }
 
 // NewBulletinBoard creates a new bulletin board
-func NewBulletinBoard() *BulletinBoard {
+func NewBulletinBoard(tellNodesToRegister bool) *BulletinBoard {
 	lastStartRun, _ := utils.GetTimestamp()
 	return &BulletinBoard{
-		Network:         make(map[int]*RelayView),
-		Clients:         make(map[int]*ClientView),
-		lastStartRun:    lastStartRun,
-		timeBetweenRuns: time.Millisecond * 10_000, // 10 seconds
+		Network:             make(map[int]*RelayView),
+		Clients:             make(map[int]*ClientView),
+		lastStartRun:        lastStartRun,
+		timeBetweenRuns:     time.Millisecond * 10_000, // 10 seconds
+		tellNodesToRegister: tellNodesToRegister,
 	}
 }
 
@@ -78,6 +80,7 @@ var useLastMu sync.Mutex
 
 // StartProtocol periodically checks if all nodes are ready and, if so, signals them to start a new run.
 func (bb *BulletinBoard) StartProtocol(useLastRegistered bool) error {
+	useLastRegistered = useLastRegistered || bb.tellNodesToRegister
 	slog.Info("Starting protocol...", "useLastRegistered", useLastRegistered)
 	if useLastRegistered {
 		useLastMu.Lock()