Hi,

ZSTD guarantees successful decompression of data compressed with older versions of zstd. But is the same guaranteed vice versa? That is if we need to compress with newer version of zstd (at one node) and decompress with older version of zstd (at another node). If that can break at any point in future, we would like to identify such cases by knowing the version with which the data is compressed. The version of zstd which is currently used for compression can be obtained via ZSTD_version() api but similarly, can we obtain the zstd version of the compressed data? Like an optional checksum appended to the compressed data, can we have an optional version number appended to the compressed data and the same is verified for compatibility during decompression?

Also, is optional checksum allowed for single step compression using context?

Thanks.