Querying DenomTrace of coin

[randomshinichi]

If you receive a coin from another chain, it will show up as 1000000ibc/27A6394C3F9FF9C9DCF5DFFADF9BB5FE9A37C7E92B006199894CF1824DF9AC7C,100000000000samoleans,99999977256stake because Cosmos SDK hashes the IBC path, so that if coins take multiple hops to get to this chain, the path won't become unbearably long.

In exchange, one needs to query the chain for the actual IBC denomination path. This example is simply lists all the IBC paths that the chain knows about, but there is another endpoint that can query for a specific hash.

grpcurl -plaintext -import-path ./third_party/proto -import-path ./proto -proto ./proto/ibc/applications/transfer/v1/query.proto localhost:9091 ibc.applications.transfer.v1.Query/DenomTraces
{
  "denomTraces": [
    {
      "path": "transfer/channel-0",
      "baseDenom": "samoleans"
    }
  ],
  "pagination": {
    "total": "1"
  }
}

You can also use gaiad

gaiad q ibc-transfer denom-trace 27A6394C3F9FF9C9DCF5DFFADF9BB5FE9A37C7E92B006199894CF1824DF9AC7C --node tcp://localhost:26557
denom_trace:
  base_denom: samoleans
  path: transfer/channel-0

It would be great if this was exposed in CosmJS.

[ethanfrey]

Yes, this would be useful.

The proto definitions can be found here: https://github.com/cosmos/cosmos-sdk/blob/v0.42.3/proto/ibc/applications/transfer/v1/query.proto