fix: feed wrap should download the wrapped chunk from the network (#4929)

Author: istae

pkg/api/bzz.go

@@ -426,7 +426,7 @@ FETCH:
 				jsonhttp.NotFound(w, "no update found")
 				return
 			}
-			wc, err := feeds.GetWrappedChunk(ctx, s.storer.ChunkStore(), ch)
+			wc, err := feeds.GetWrappedChunk(ctx, s.storer.Download(cache), ch)
 			if err != nil {
 				logger.Debug("bzz download: mapStructure feed update failed", "error", err)
 				logger.Error(nil, "bzz download: mapStructure feed update failed")

pkg/api/feed.go

@@ -102,7 +102,7 @@ func (s *Service) feedGetHandler(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 
-	wc, err := feeds.GetWrappedChunk(r.Context(), s.storer.ChunkStore(), ch)
+	wc, err := feeds.GetWrappedChunk(r.Context(), s.storer.Download(false), ch)
 	if err != nil {
 		logger.Error(nil, "wrapped chunk cannot be retrieved")
 		jsonhttp.NotFound(w, "wrapped chunk cannot be retrieved")

pkg/feeds/getter.go

@@ -6,7 +6,6 @@ package feeds
 
 import (
 	"context"
-	"encoding/binary"
 	"errors"
 	"fmt"
 	"time"
@@ -60,7 +59,7 @@ func GetWrappedChunk(ctx context.Context, getter storage.Getter, ch swarm.Chunk)
 	// possible values right now:
 	// unencrypted ref: span+timestamp+ref => 8+8+32=48
 	// encrypted ref: span+timestamp+ref+decryptKey => 8+8+64=80
-	_, ref, err := LegacyPayload(wc)
+	ref, err := legacyPayload(wc)
 	if err != nil {
 		if errors.Is(err, errNotLegacyPayload) {
 			return wc, nil
@@ -84,14 +83,12 @@ func FromChunk(ch swarm.Chunk) (swarm.Chunk, error) {
 	return s.WrappedChunk(), nil
 }
 
-// LegacyPayload returns back the referenced chunk and datetime from the legacy feed payload
-func LegacyPayload(wrappedChunk swarm.Chunk) (uint64, swarm.Address, error) {
+// legacyPayload returns back the referenced chunk and datetime from the legacy feed payload
+func legacyPayload(wrappedChunk swarm.Chunk) (swarm.Address, error) {
 	cacData := wrappedChunk.Data()
 	if !(len(cacData) == 16+swarm.HashSize || len(cacData) == 16+swarm.HashSize*2) {
-		return 0, swarm.ZeroAddress, errNotLegacyPayload
+		return swarm.ZeroAddress, errNotLegacyPayload
 	}
-	address := swarm.NewAddress(cacData[16:])
-	at := binary.BigEndian.Uint64(cacData[8:16])
 
-	return at, address, nil
+	return swarm.NewAddress(cacData[16:]), nil
 }