PeerDAS: Refactor reconstruction and improve DataColumnStorage.Get. (#15309)

* PeerDAS: Refactor reconstruction.

* DB Columns filesystem: Add missing tests and exit early in `Get`.

* Add changelog.

* Fix Preston's comment.

* Fix `TestDataColumnsAlignWithBlock`.

cmd/beacon-chain/flags/base.go

@@ -321,4 +321,9 @@ var (
 		Usage: "Specifies the retention period for the pruner service in terms of epochs. " +
 			"If this value is less than MIN_EPOCHS_FOR_BLOCK_REQUESTS, it will be ignored.",
 	}
+	// SubscribeAllDataSubnets enables subscription to all data subnets.
+	SubscribeAllDataSubnets = &cli.BoolFlag{
+		Name:  "subscribe-all-data-subnets",
+		Usage: "Enable subscription to all data subnets.",
+	}
 )

cmd/beacon-chain/flags/config.go

@@ -9,6 +9,7 @@ import (
 // beacon node.
 type GlobalFlags struct {
 	SubscribeToAllSubnets      bool
+	SubscribeAllDataSubnets    bool
 	MinimumSyncPeers           int
 	MinimumPeersPerSubnet      int
 	MaxConcurrentDials         int
@@ -37,10 +38,17 @@ func Init(c *GlobalFlags) {
 // based on the provided cli context.
 func ConfigureGlobalFlags(ctx *cli.Context) {
 	cfg := &GlobalFlags{}
+
 	if ctx.Bool(SubscribeToAllSubnets.Name) {
 		log.Warn("Subscribing to All Attestation Subnets")
 		cfg.SubscribeToAllSubnets = true
 	}
+
+	if ctx.Bool(SubscribeAllDataSubnets.Name) {
+		log.Warning("Subscribing to all data subnets")
+		cfg.SubscribeAllDataSubnets = true
+	}
+
 	cfg.BlockBatchLimit = ctx.Int(BlockBatchLimit.Name)
 	cfg.BlockBatchLimitBurstFactor = ctx.Int(BlockBatchLimitBurstFactor.Name)
 	cfg.BlobBatchLimit = ctx.Int(BlobBatchLimit.Name)