misc(cel-shed): add a data hash exists | get helper to cel-shed (#4736)

Co-authored-by: ramin <[email protected]>

Author: vgonkivs

cmd/cel-shed/hash_presence.go

@@ -0,0 +1,137 @@
+package main
+
+import (
+	"context"
+	"encoding/hex"
+	"encoding/json"
+	"fmt"
+	"io"
+
+	"github.com/spf13/cobra"
+
+	"github.com/celestiaorg/celestia-node/share"
+	"github.com/celestiaorg/celestia-node/store"
+)
+
+const (
+	nodeStorePathFlag = "node.store"
+)
+
+func init() {
+	hashCmd.PersistentFlags().String("node.store", "", "Path to the node store")
+
+	hashCmd.AddCommand(hasHashCmd, getByHashCmd)
+}
+
+var hashCmd = &cobra.Command{
+	Use:   "hash [subcommand] [flags]",
+	Short: "Commands to interact with EDS hashes",
+	PersistentPreRunE: func(cmd *cobra.Command, args []string) error {
+		path, err := cmd.Flags().GetString(nodeStorePathFlag)
+		if err != nil {
+			return err
+		}
+
+		rootHash, err := parseHash(args[0])
+		if err != nil {
+			return err
+		}
+		st, err := store.NewStore(store.DefaultParameters(), path)
+		if err != nil {
+			return fmt.Errorf("creating a store: %w", err)
+		}
+
+		ctx := cmd.Context()
+
+		ctx = context.WithValue(ctx, hashKey{}, rootHash)
+		ctx = context.WithValue(ctx, edsStoreKey{}, st)
+		cmd.SetContext(ctx)
+		return nil
+	},
+}
+
+var hasHashCmd = &cobra.Command{
+	Use:     "has [root hash] [flags]",
+	Aliases: []string{"exists"},
+	Short:   "Command to check whether a hash is present in the eds store",
+	Args:    cobra.ExactArgs(1),
+	RunE: func(cmd *cobra.Command, _ []string) error {
+		rootHash, store, err := parseDataFromContext(cmd.Context())
+		if err != nil {
+			return err
+		}
+
+		exists, err := store.HasByHash(context.Background(), rootHash)
+		if err != nil {
+			return fmt.Errorf("checking for root hash: %w", err)
+		}
+
+		if exists {
+			fmt.Printf("Root hash %s exists.\n", rootHash)
+		} else {
+			fmt.Printf("Root hash %s does not exist.\n", rootHash)
+		}
+		return nil
+	},
+}
+
+var getByHashCmd = &cobra.Command{
+	Use:   "get [root hash] [flag]",
+	Short: "Command to get the eds from the eds store by its hash",
+	Args:  cobra.ExactArgs(1),
+	RunE: func(cmd *cobra.Command, _ []string) error {
+		rootHash, store, err := parseDataFromContext(cmd.Context())
+		if err != nil {
+			return err
+		}
+
+		eds, err := store.GetByHash(context.Background(), rootHash)
+		if err != nil {
+			return err
+		}
+
+		fmt.Printf("Retrieved EDS for root hash: %s\n\n", rootHash)
+
+		reader, err := eds.Reader()
+		if err != nil {
+			return err
+		}
+		data, err := io.ReadAll(reader)
+		if err != nil {
+			return err
+		}
+		output, err := json.MarshalIndent(data, "", "  ")
+		if err != nil {
+			return err
+		}
+
+		fmt.Println(string(output))
+		return nil
+	},
+}
+
+func parseHash(str string) (root share.DataHash, err error) {
+	hexData, err := hex.DecodeString(str)
+	if err != nil {
+		return nil, fmt.Errorf("failed to decode hex string: %w", err)
+	}
+	return hexData, nil
+}
+
+type (
+	hashKey     struct{}
+	edsStoreKey struct{}
+)
+
+func parseDataFromContext(ctx context.Context) (share.DataHash, *store.Store, error) {
+	hash, ok := ctx.Value(hashKey{}).(share.DataHash)
+	if !ok {
+		return nil, nil, fmt.Errorf("root hash not found in context")
+	}
+
+	st, ok := ctx.Value(edsStoreKey{}).(*store.Store)
+	if !ok {
+		return nil, nil, fmt.Errorf("eds store not found in context")
+	}
+	return hash, st, nil
+}

cmd/cel-shed/main.go

@@ -10,7 +10,7 @@ import (
 )
 
 func init() {
-	rootCmd.AddCommand(p2pCmd, headerCmd, edsStoreCmd, shwapCmd, squareCmd)
+	rootCmd.AddCommand(p2pCmd, headerCmd, edsStoreCmd, shwapCmd, squareCmd, hashCmd)
 }
 
 var rootCmd = &cobra.Command{