swarm, cmd/swarm: address ineffectual assignments (#18048)

* swarm, cmd/swarm: address ineffectual assignments

* swarm/network: remove unused vars from testHandshake

* swarm/storage/feed: revert cursor changes

swarm/api/act.go

@@ -458,6 +458,9 @@ func DoACT(ctx *cli.Context, privateKey *ecdsa.PrivateKey, salt []byte, grantees
 			return nil, nil, nil, err
 		}
 		sessionKey, err := NewSessionKeyPK(privateKey, granteePub, salt)
+		if err != nil {
+			return nil, nil, nil, err
+		}
 
 		hasher := sha3.NewKeccak256()
 		hasher.Write(append(sessionKey, 0))

swarm/api/client/client_test.go

@@ -457,6 +457,9 @@ func TestClientCreateUpdateFeed(t *testing.T) {
 	}
 
 	feedManifestHash, err := client.CreateFeedWithManifest(createRequest)
+	if err != nil {
+		t.Fatal(err)
+	}
 
 	correctManifestAddrHex := "0e9b645ebc3da167b1d56399adc3276f7a08229301b72a03336be0e7d4b71882"
 	if feedManifestHash != correctManifestAddrHex {

swarm/api/filesystem.go

@@ -122,6 +122,10 @@ func (fs *FileSystem) Upload(lpath, index string, toEncrypt bool) (string, error
 			var wait func(context.Context) error
 			ctx := context.TODO()
 			hash, wait, err = fs.api.fileStore.Store(ctx, f, stat.Size(), toEncrypt)
+			if err != nil {
+				errors[i] = err
+				return
+			}
 			if hash != nil {
 				list[i].Hash = hash.Hex()
 			}

swarm/api/http/server.go

@@ -366,7 +366,7 @@ func (s *Server) handleMultipartUpload(r *http.Request, boundary string, mw *api
 		}
 
 		var size int64
-		var reader io.Reader = part
+		var reader io.Reader
 		if contentLength := part.Header.Get("Content-Length"); contentLength != "" {
 			size, err = strconv.ParseInt(contentLength, 10, 64)
 			if err != nil {

swarm/api/http/server_test.go

@@ -263,7 +263,7 @@ func TestBzzFeed(t *testing.T) {
 	if resp.StatusCode == http.StatusOK {
 		t.Fatal("Expected error status since feed update does not contain multihash. Received 200 OK")
 	}
-	b, err = ioutil.ReadAll(resp.Body)
+	_, err = ioutil.ReadAll(resp.Body)
 	if err != nil {
 		t.Fatal(err)
 	}
@@ -491,6 +491,9 @@ func testBzzGetPath(encrypted bool, t *testing.T) {
 		}
 		defer resp.Body.Close()
 		respbody, err = ioutil.ReadAll(resp.Body)
+		if err != nil {
+			t.Fatalf("Error while reading response body: %v", err)
+		}
 
 		if string(respbody) != testmanifest[v] {
 			isexpectedfailrequest := false

swarm/api/manifest.go

@@ -557,7 +557,6 @@ func (mt *manifestTrie) findPrefixOf(path string, quitC chan bool) (entry *manif
 			if path != entry.Path {
 				return nil, 0
 			}
-			pos = epl
 		}
 	}
 	return nil, 0