Add a command to the CLI to get a denom hash from a trace path (port/channel) and base denom

[andynog]

Summary

It would be very helpful for debug and validation purposes to have a command that can return the Hash out of a Denom Trace.

Problem Definition

As a user I want to find the hash of a denom trace if I only have the [port_id]/[channel_id] and [base_denom] information.

This would be the reverse of a query ibc-transfer denom-trace command.

Proposal

The proposed command would be something like:

$ simd ibc-transfer denom-hash [port_id] [channel_id] [base_denom]

For example:

$ simd ibc-transfer denom-hash transfer channel-0 uatom
27394FB092D2ECCD56123C74F36E4C1F926001CEADA9CA97EA622B25F41E5EB2

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For Admin Use

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• Appropriate contributors tagged/assigned

[crodriguezvega]

Thanks for the suggestion, @andynog!

As explained in this ADR the path of the denom trace consists of the chain of port/channel identifiers used for tracing the source of the fungible token. So if a token has travelled through multiples chains then the path will contain more than one port/channel pair. Should the proposed command then support (if possible) an arbitrary number of [port_id] [channel_id] pairs as input to generate the hash?

[andynog]

hi @crodriguezvega, yes that is a good point. The command would have to accept multiple paths. What if instead of a [port_id] [channel_id] you have to specify the full path instead like:

$ simd ibc-transfer denom-hash [denom_path]

where [denom_path] could be something like:
[port_id]/[channel_id]/[denom]
[port_id]/[channel_id]/[port_id]/[channel_id2]/[denom]

for example:
transfer/channel_0/uatom
transfer/channel_0/transfer/channel_1/uatom

[crodriguezvega]

Yes, I think that will work!

[nir1218]

Hi @crodriguezvega I would like to take on this issue, this will be my first issue. Please let me know if this issue is still planned or it ought to be cancelled. Thanks.

[crodriguezvega]

Thank you very much, @nir1218. Yes, we still want to work on this (it's actually planned for a release end of this month, if possible). Don't hesitate to ask us any questions you may have as you work through it.

[nir1218]

@crodriguezvega please assign it to me.

[crodriguezvega]

Thank you, @nir1218!