blobpacked

type BlobAndPos struct {
	blob.SizedRef
	Offset int64 `json:"offset"`
}

type Manifest struct {
	// WholeRef is the blobref of the entire file that this zip is
	// either fully or partially describing.  For files under
	// around 16MB, the WholeRef and DataBlobsOrigin will be
	// the same.
	WholeRef blob.Ref `json:"wholeRef"`

	// WholeSize is the number of bytes in the original file being
	// cut up.
	WholeSize int64 `json:"wholeSize"`

	// WholePartIndex is the chunk number (0-based) of this zip file.
	// If a client has 'n' zip files with the same WholeRef whose
	// WholePartIndexes are contiguous (including 0) and the sum of
	// the DataBlobs equals WholeSize, the client has the entire
	// original file.
	WholePartIndex int `json:"wholePartIndex"`

	// DataBlobsOrigin is the blobref of the contents of the first
	// file in the zip pack file. It is the origin of all the logical data
	// blobs referenced in DataBlobs.
	DataBlobsOrigin blob.Ref `json:"dataBlobsOrigin"`

	// DataBlobs describes all the logical blobs that are
	// concatenated together in the first file in the zip file.
	// The offsets are relative to the beginning of that first
	// file, not the beginning of the zip file itself.
	DataBlobs []BlobAndPos `json:"dataBlobs"`
}