[Feature] Support chains that use cometbft/PubKeyBn254 key types like Union

[cosmos-spaces]

ERR failed to connect to https://rpc.testnet-9.union.build error="failed to get status of https://rpc.testnet-9.union.build: All attempts fail:\n#1: error in json rpc client, with http response metadata: (Status: 200 OK, Protocol HTTP/1.1). error unmarshalling result: unknown type "cometbft/PubKeyBn254"\n#2: error in json rpc client, with http response metadata: (Status: 200 OK, Protocol HTTP/1.1). error unmarshalling result: unknown type "cometbft/PubKeyBn254""

[MattKetmo]

Hello,

You can try branch bn254 in PR #99.

I just added it as a placeholder, which means it will bypass this error but without having real support for this crypto key.

The downside is having to disable the staking and commission modules.

Example:

$ cosmos-validator-watcher \
  --node https://rpc.testnet-9.union.build \
  --validator 27006F6016DD745D541C0E38B19FE833FE7B64E9 \
  --no-staking --no-commission

[cosmos-spaces]

Thank you for taking care of this so quickly even if its partial support.