// If all are zero, payload is 0 bytes.
		return nil
	}
	return e.encoder().ReconstructData(data)
}

// DecodeDataAndParityBlocks decodes the given erasure-coded data and verifies it.
// It returns an error if the decoding failed.
func (e *Erasure) DecodeDataAndParityBlocks(ctx context.Context, data [][]byte) error {
	return e.encoder().Reconstruct(data)
}

			encoded[j] = nil
		}
		for j := test.dataBlocks; j < test.dataBlocks+test.missingParity; j++ {
			encoded[j] = nil
		}

		if test.reconstructParity {
			err = erasure.DecodeDataAndParityBlocks(t.Context(), encoded)
		} else {
			err = erasure.DecodeDataBlocks(encoded)
		}

		if err == nil && test.shouldFail {
			t.Errorf("Test %d: test should fail but it passed", i)
		}

			if errors.Is(err, errFileNotFound) || errors.Is(err, errFileCorrupt) {
				if derr == nil {
					derr = err
				}
			}
		} else if err != nil {
			return err
		}

		if err = e.DecodeDataAndParityBlocks(ctx, bufs); err != nil {
			return err
		}

		w := multiWriter{
			writers:     writers,
			writeQuorum: 1,
			errs:        make([]error, len(writers)),
		}