ibc v4 for v8

[faddat]

I think it might make a lot of sense to jump to ibc v4 in v8.

This way, we're using "fresher" upstream code.

Note: this may require an ibc-go migration / upgrade handler, but I'm headed to bed now :)

[codecov]

Codecov Report

Merging #2012 (97b6383) into fix-v8 (d9de8ca) will not change coverage.
The diff coverage is n/a.

Additional details and impacted files

@@           Coverage Diff           @@
##           fix-v8    #2012   +/-   ##
=======================================
  Coverage   79.04%   79.04%           
=======================================
  Files          23       23           
  Lines        1565     1565           
=======================================
  Hits         1237     1237           
  Misses        274      274           
  Partials       54       54           

[glnro]

Hey @faddat this would be great if v8 was happening in isolation, but the catch is it's going to be followed immediately by v9 with ICS which is still dependent on v3.4.0... tagging @mpoke @jtremback for input.

[faddat]

Ah so I think that @yaruwangway is working on a v9 with v4.2.0

My thinking is that this will get an upgrade out of the way in V8, so we can have fewer changes in v9

[faddat]

I'll also be having some pokes at ccv this week, and looking into consumer chains. I'd like to use 47 when prototyoing them... Will see what I see :).

Probably next week though.

[sonarcloud]

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[glnro]

@faddat closing this just to consolidate as there is already a spike to look at 4.2 in V9 though the likely scenario is 4.2 in v10. V8 will launch with 3.4