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[backport] Several small fixes for 12.x #735

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@apoelstra apoelstra commented Aug 31, 2024

We are incorrectly serializing and_n as "and_b", and incorrectly parsing tr(<key>,).

In master the and_b thing is fixed by #722 which rewrites the Display impl completely and the tr(<key>,) thing will be fixed as part of a coming series of PRs to clean up expression parsing.

Also includes #740 since it showed up in time.

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ACK 98ea9df

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Actually I will hold off on this. Will add a patch for #736 and anything else I find over the next few days.

We are incorrectly serializing and_n as "and_b".

In master this is fixed by
rust-bitcoin#722
which rewrites the Display impl completely.
@apoelstra apoelstra marked this pull request as draft September 1, 2024 13:41
apoelstra added a commit to apoelstra/rust-miniscript that referenced this pull request Sep 1, 2024
When fuzzing my new non-recursive tree parsing logic, I noticed that we
were deviating from the released 12.0 in the way that we display l:0.
This is an ambiguous fragment which can be displayed either as l:0 or
u:0. In our released code we use u:0 so stick with that.

This was unintentially changed as part of rust-bitcoin#722. Change it back.

While we are at it add a regression test for rust-bitcoin#735
@apoelstra apoelstra changed the title [backport] miniscript: fix string serialization of and_n [backport] Several small fixes for 12.x Sep 3, 2024
@apoelstra apoelstra marked this pull request as ready for review September 3, 2024 14:51
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Ready for review. I have fuzzed this against my rewritten code for 40 hours now without any new incompatibilities cropping up.

apoelstra added a commit that referenced this pull request Sep 3, 2024
1259375 miniscript: make display prefer 'u' over 'l' in the fragment l:0 (Andrew Poelstra)
67fdc50 descriptor: reject strings of the form "tr(<key>,)" (Andrew Poelstra)
00cac40 descriptor: add unit test demonstrating sanity-checking behavior in <= 12.x (Andrew Poelstra)

Pull request description:

  This PR has three changes which are mostly unrelated except that they were all found when fuzzing my "rewrite expression parser to be nonrecursive" branch against 12.x.

  * First is a unit test demonstrating #734. It doesn't fix anything, just tests the current behavior.
  * Second is a fix for #736 (backported in #735).
  * Third tweaks the new `Display` code from #722 to change how the ambiguous `l:0`/`u:0` is serialized, to match 12.x.

ACKs for top commit:
  sanket1729:
    ACK 1259375

Tree-SHA512: 921d65a1efd49bda0f9db488a2854b004e14518f584d832497a9dbc13a845ceec99544375385570c6ac42d4985277e8dcbb3aa8654de93235cf9067ba601f91d
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3 participants