}

			// Prepare the checksum map with appropriate headers
			m := chksm.AsMap()
			m[xhttp.AmzChecksumAlgo] = chksm.Type.String() // Set the algorithm explicitly
			if chksm.Type.FullObjectRequested() {
				m[xhttp.AmzChecksumType] = xhttp.AmzChecksumTypeFullObject
			} else {
				m[xhttp.AmzChecksumType] = xhttp.AmzChecksumTypeComposite
			}

			w := httptest.NewRecorder()
			AddChecksumHeader(w, m)

				}
			}
			cs := hash.NewChecksumString(checksumType.String(), crc)
			if !cs.Valid() {
				return oi, InvalidPart{
					PartNumber: part.PartNumber,
				}
			}
			if checksumType.FullObjectRequested() {
				if err := checksum.AddPart(*cs, expPart.ActualSize); err != nil {
					return oi, InvalidPart{
						PartNumber: part.PartNumber,
						ExpETag:    "<nil>",
						GotETag:    err.Error(),
					}