Ability to specify Tendermint CompatMode in chain config in config.toml

[rootulp]

Summary

Add the ability to explicitly set the Tendermint CompatMode in chain config in config.toml.

Problem Definition

Celestia currently uses Tendermint v0.34.x but it has overridden the version field of the abci_info endpoint to return the application version (i.e. v1.0.0-rc14) and not the Tendermint version. See celestiaorg/celestia-core#1035 and celestiaorg/celestia-core#1036 for more details.

As a result, of the code here and here, Hermes falls back to Tendermint compat mode v0.37 which breaks for celestia-app. More context on how this breaks in #3620.

Proposal

Add the ability to explicitly set the Tendermint CompatMode in chain config in config.toml. If a chain doesn't specify it in chain config, then I think the current mechanism should be used where it is fetched from abci_info and falls back to v0.37.

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[romac]

Thanks for the suggestion, and sorry you've had to work around this. We'll get to this after the v1.7 release!

[romac]

Blocked until informalsystems/tendermint-rs#1367 is released.