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xcmp-queue: Fix handling of encoded blobs #889
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With #701 we tried to fix some infinite loop related to encoded blobs, however that lead actually to not being able to process encoded blobs at all. The reason for this is that `decode_all` doesn't consume the given input. The point of this function is that it returns an error if the data couldn't be decoded or there is still data left. However, this means that the check `remaining_fragments.len() < last_remaining_fragments.len()` would always fail. We remove the while loop, because we decode the entire fragment anyway or it fails. Aka, we don't need to loop here. Next we remove the broken check and we directly reset the `remaining_fragments` (because `decode_all` doesn't consume anything).
bkchr
added
A0-pleasereview
B0-silent
|
Can we do a similar thing with the XcmpMessageFormat::ConcatenatedVersionedXcm case? |
This is not required. |
We need to use a while loop, because there can be multiple `Vec<u8>`s. We also need to use `decode`, because `decode_all` would otherwise return an error if the input is not empty afterwards.
KiChjang
reviewed
Jan 12, 2022
KiChjang
approved these changes
Jan 19, 2022
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With #701 we tried to fix some infinite loop related to encoded blobs, however that lead actually to
not being able to process encoded blobs at all. The reason for this is that
decode_alldoesn'tconsume the given input. The point of this function is that it returns an error if the data couldn't
be decoded or there is still data left. However, this means that the check
remaining_fragments.len() < last_remaining_fragments.len()would always fail.We remove the while loop, because we decode the entire fragment anyway or it fails. Aka, we don't
need to loop here. Next we remove the broken check and we directly reset the
remaining_fragments(becausedecode_alldoesn't consume anything).