ErrBlobDigestMismatch is returned when PutBlob() is given a blob with a digest-based name that doesn't match its contents.

ErrBlobSizeMismatch is returned when PutBlob() is given a blob with an expected size that doesn't match the reader.

ErrInvalidReference is returned when ParseReference() is passed an empty reference.

ErrNoManifestLists is returned when GetManifest() is called.

ErrNoSuchImage is returned when we attempt to access an image which doesn't exist in the storage area.

ErrPathNotAbsolute is returned when a graph root is not an absolute path name.

Transport is an ImageTransport that uses either a default storage.Store or one that's it's explicitly told to use.

StoreTransport is an ImageTransport that uses a storage.Store to parse references, either its own default or one that it's told to use.