Add support for cryptographic equivocation to support ICS in Gaia v14

[mmulji-ic]

Gaia v14 introduces an updated ICS provider, which can handle slashing for misbehaving clients in an automated fashion. Therefore Hub governance proposals such as prop 818 are no longer required.

Adding this support, to be able to report misbehaviour, would bring the Go relayer in line with Hermes release 1.7.3, which supports this functionality.

[jtieri]

Hey @mmulji-ic, getting back to this a little late since it was not in scope of our recent release.

I'd like to begin scoping this work, but to do so I need to learn a bit more about what supporting this feature entails. Is there somewhere that I can read a spec on cryptographic equivocation?

[sainoe]

Hi @jtieri. You can find the cryptographic equivocation ADR here.

[jtieri]

Hi @jtieri. You can find the cryptographic equivocation ADR here.

thanks! i'm out of the office for the next week but will begin to dig through the ADR asap

[jonathanpberger]

Blocked until ICS updates deps.

IDEA: could we downgrade in the relayer for now? Show it works and then build suite after. Then wait on merging until new ICS is ready.

[jonathanpberger]

Tried downgrading the relayer, but it was more trouble than it's worth. Iceboxing story.