1 files changed, 40 insertions, 0 deletions
diff --git a/swarm/storage/filestore.go b/swarm/storage/filestore.go
index 2d8d82d95..aebe03c1e 100644
--- a/swarm/storage/filestore.go
+++ b/swarm/storage/filestore.go
@@ -19,6 +19,7 @@ package storage
 import (
 	"context"
 	"io"
+	"sort"
 )
 
 /*
@@ -96,3 +97,42 @@ func (f *FileStore) Store(ctx context.Context, data io.Reader, size int64, toEnc
 func (f *FileStore) HashSize() int {
 	return f.hashFunc().Size()
 }
+
+// Public API. This endpoint returns all chunk hashes (only) for a given file
+func (f *FileStore) GetAllReferences(ctx context.Context, data io.Reader, toEncrypt bool) (addrs AddressCollection, err error) {
+	// create a special kind of putter, which only will store the references
+	putter := &HashExplorer{
+		hasherStore: NewHasherStore(f.ChunkStore, f.hashFunc, toEncrypt),
+		References:  make([]Reference, 0),
+	}
+	// do the actual splitting anyway, no way around it
+	_, _, err = PyramidSplit(ctx, data, putter, putter)
+	if err != nil {
+		return nil, err
+	}
+	// collect all references
+	addrs = NewAddressCollection(0)
+	for _, ref := range putter.References {
+		addrs = append(addrs, Address(ref))
+	}
+	sort.Sort(addrs)
+	return addrs, nil
+}
+
+// HashExplorer is a special kind of putter which will only store chunk references
+type HashExplorer struct {
+	*hasherStore
+	References []Reference
+}
+
+// HashExplorer's Put will add just the chunk hashes to its `References`
+func (he *HashExplorer) Put(ctx context.Context, chunkData ChunkData) (Reference, error) {
+	// Need to do the actual Put, which returns the references
+	ref, err := he.hasherStore.Put(ctx, chunkData)
+	if err != nil {
+		return nil, err
+	}
+	// internally store the reference
+	he.References = append(he.References, ref)
+	return ref, nil
+}