Rename unsafe-sync to head-sync (#7570)

* Rename unsafe-sync to head-sync

* Update comments

Co-authored-by: prylabs-bulldozer[bot] <58059840+prylabs-bulldozer[bot]@users.noreply.github.com>

beacon-chain/blockchain/service.go

@@ -425,7 +425,7 @@ func (s *Service) initializeChainInfo(ctx context.Context) error {
 	}
 	s.genesisRoot = genesisBlkRoot
 
-	if flags.Get().UnsafeSync {
+	if flags.Get().HeadSync {
 		headBlock, err := s.beaconDB.HeadBlock(ctx)
 		if err != nil {
 			return errors.Wrap(err, "could not retrieve head block")

beacon-chain/flags/base.go

@@ -90,9 +90,9 @@ var (
 		Usage: "The percentage of freshly allocated data to live data on which the gc will be run again.",
 		Value: 100,
 	}
-	// UnsafeSync starts the beacon node from the previously saved head state and syncs from there.
-	UnsafeSync = &cli.BoolFlag{
-		Name:  "unsafe-sync",
+	// HeadSync starts the beacon node from the previously saved head state and syncs from there.
+	HeadSync = &cli.BoolFlag{
+		Name:  "head-sync",
 		Usage: "Starts the beacon node with the previously saved head state instead of finalized state.",
 	}
 	// SlotsPerArchivedPoint specifies the number of slots between the archived points, to save beacon state in the cold

beacon-chain/flags/config.go

@@ -9,7 +9,7 @@ import (
 // GlobalFlags specifies all the global flags for the
 // beacon node.
 type GlobalFlags struct {
-	UnsafeSync                 bool
+	HeadSync                   bool
 	DisableSync                bool
 	DisableDiscv5              bool
 	MinimumSyncPeers           int
@@ -36,9 +36,9 @@ func Init(c *GlobalFlags) {
 // based on the provided cli context.
 func ConfigureGlobalFlags(ctx *cli.Context) {
 	cfg := &GlobalFlags{}
-	if ctx.Bool(UnsafeSync.Name) {
-		log.Warn("Using Unsafe Sync flag, it is insecure to use this flag with your beacon node.")
-		cfg.UnsafeSync = true
+	if ctx.Bool(HeadSync.Name) {
+		log.Warn("Using Head Sync flag, it starts syncing from last saved head.")
+		cfg.HeadSync = true
 	}
 	if ctx.Bool(DisableSync.Name) {
 		log.Warn("Using Disable Sync flag, using this flag on a live network might lead to adverse consequences.")

beacon-chain/main.go

@@ -39,7 +39,7 @@ var appFlags = []cli.Flag{
 	flags.MinSyncPeers,
 	flags.ContractDeploymentBlock,
 	flags.SetGCPercent,
-	flags.UnsafeSync,
+	flags.HeadSync,
 	flags.DisableSync,
 	flags.DisableDiscv5,
 	flags.BlockBatchLimit,

beacon-chain/usage.go

@@ -98,7 +98,7 @@ var appHelpFlagGroups = []flagGroup{
 			flags.GPRCGatewayCorsDomain,
 			flags.HTTPWeb3ProviderFlag,
 			flags.SetGCPercent,
-			flags.UnsafeSync,
+			flags.HeadSync,
 			flags.DisableSync,
 			flags.SlotsPerArchivedPoint,
 			flags.DisableDiscv5,