Package rollsum implements rolling checksums similar to apenwarr's bup, which is similar to librsync.

GetDiffer returns a differ than can be used with ApplyDiffWithDiffer.

ZstdCompressor is a CompressorFunc for the zstd compression algorithm.

ErrBadRequest is returned when the request is not valid.

ErrFallbackToOrdinaryLayerDownload is a custom error type that suggests to the caller that a fallback mechanism can be used instead of a hard failure.

ImageSourceChunk is a portion of a blob.

ImageSourceSeekable is an image source that permits to fetch chunks of the entire blob.