refactor: pull StreamCid outside of ChunkingManifest; streamCid is orthogonal to the chunking manifest

core/coreunix/add.go

@@ -5,11 +5,12 @@ import (
 	"crypto/sha256"
 	"errors"
 	"fmt"
-	"github.com/multiformats/go-multihash"
 	"io"
 	gopath "path"
 	"strconv"
 
+	"github.com/multiformats/go-multihash"
+
 	"github.com/ipfs/go-cid"
 	bstore "github.com/ipfs/go-ipfs-blockstore"
 	chunker "github.com/ipfs/go-ipfs-chunker"
@@ -427,7 +428,8 @@ func (adder *Adder) addFile(path string, file files.File) error {
 			if err != nil {
 				return err
 			}
-			chunkingManifest.StreamCid = cid.NewCidV1(cid.Raw, mh)
+			sha256StreamCid := cid.NewCidV1(cid.Raw, mh)
+			_ = sha256StreamCid // TODO: use this when inserting into the "big file store"
 		}
 
 		// TODO: place the chunkingManifest into the "big file store".

core/coreunix/bigfile.go

@@ -9,7 +9,6 @@ import (
 )
 
 type ChunkingManifest struct {
-	StreamCid  cid.Cid
 	ChunkedCid cid.Cid
 	Chunks     []*ChunkingManifestChunk
 }
@@ -23,7 +22,6 @@ type ChunkingManifestChunk struct {
 func extractChunkingManifest(ctx context.Context, dagSvc ipld.DAGService, chunkedFileCid cid.Cid) (*ChunkingManifest, error) {
 	getLinks := dag.GetLinksWithDAG(dagSvc)
 	chunking := &ChunkingManifest{
-		// TODO: compute and set stream cid (aka "SID")
 		ChunkedCid: chunkedFileCid,
 	}
 	var verr error