`hermes keys balance` doesn't show all denoms

[ancazamfir]

Summary of Bug

hermes keys balance only shows the balance of the config's gas_price denom.

$ hermes --config config.toml keys list --chain ibc-1
SUCCESS
- relayer (cosmos1zc7qkhjr4delcr785q0a4jsqcchjef4vvpup70)
- wallet (cosmos14ev9kx7tj4kl48jgm698qqpeth54ykz6l2x3k5)
- user1 (cosmos1gef995hlygyyqfqcjkgt0a58rt356ssh4zmy2j)
- user2 (cosmos15jyrwymfshhsjznelhvleklzjas0vjga3wrrk5)
- testkey (cosmos1wn7kusrmrn2ms6e2cex7uud3uhvsm6xt3p96jj)

$ hermes --config config.toml keys balance --chain ibc-1 --key-name testkey
SUCCESS balance for key `testkey`: 99999998688 stake

$ gaiad query bank balances cosmos1wn7kusrmrn2ms6e2cex7uud3uhvsm6xt3p96jj --node http://0.0.0.0:26557
balances:
- amount: "30"
  denom: ibc/27A6394C3F9FF9C9DCF5DFFADF9BB5FE9A37C7E92B006199894CF1824DF9AC7C
- amount: "100000000000"
  denom: samoleans
- amount: "99999998688"
  denom: stake
pagination:
  next_key: null
  total: "0"

I am pretty sure this used to work like the gaiad query bank balance counterpart but haven't traced the PR that change this.

Version

Steps to Reproduce

Acceptance Criteria

---

For Admin Use

• [ ] Not duplicate issue
• [ ] Appropriate labels applied
• [ ] Appropriate milestone (priority) applied
• [ ] Appropriate contributors tagged
• [ ] Contributor assigned/self-assigned

[ljoss17]

The current hermes keys balance command was introduced with this PR, https://github.com/informalsystems/hermes/pull/2232. As I recall the idea was to output the balance of the token used for gas, as the interest was knowing if there was enough funds to submit a transaction.

I think it would be a good idea to improve this command, the following solutions come to my mind:

1. Add an optional flag --denom to specify the denom to query, with a special value to query all denom. For example:
   • hermes keys balance --chain <CHAIN_ID> --key-name <KEY_NAME> --denom samoleans to display only the amount of samoleans
   • hermes keys balance --chain <CHAIN_ID> --key-name <KEY_NAME> --denom all to display the balance for all denom
   • hermes keys balance --chain <CHAIN_ID> --key-name <KEY_NAME> to display the balance of the gas_price denom
2. Add an optional flag --all which outputs the balance for all denom when used, and only the balance of the gas_price denom if not used. For example:
   • hermes keys balance --chain <CHAIN_ID> --key-name <KEY_NAME> to display only the balance of gas_price denom
   • hermes keys balance --chain <CHAIN_ID> --key-name <KEY_NAME> --all to display the balance of all denom
3. Update the command to always output the balance of all denoms

I have a preference for the first solution, adding a --denom flag, as it keeps the actual command as it is, but gives the user the possibility to have a more specific output.

What do you think ?

[ancazamfir]

Option 1 looks good.