Hi,
There are multiple filetransfer XEPs like e.g. XEP-0385 / XEP-0447 / XEP-0396
They define a hash element, but its not clear to me if the hash is after
encryption or before, if the file should be transferred encrypted.
If it is after encryption, the hash can only be used in edge cases for caching
purposes (look up if we have this file already) because encryption keys change
with each file transfer hence the hash of the encrypted file would change.
Regards
Philipp
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