orchestration: example dapp contract that can swap on osmosis

[0xpatrickdev]

What is the Problem Being Solved?

As a zoe smart contract, I'd like to be able to swap assets on an external chain. A user offers me ATOM* and wants an equivalent amount of IST** in return. I will use the Osmosis DEX to complete the swap.

• for simplicity, we may want to start with an Osmosis-native asset like OSMO so we do not need to unwrap ATOM (ibc transfer to gaia -> ibc transfer to osmosis with hook)
  ** tangential to the above, a non-Agoric asset will need to be unwrapped going back to Agoric so we may want to test with a different scenario here as we progress.

Description of the Design

Use vat-transfer (#8624) to make a Transfer Account and execute a Swap on Osmosis using cosmwasm IBC-Hooks.

To start, the goal is to create working zoe contract that using the listed APIs. The author may want to consider future reuse of the contract and how we can expose functionality for this to become a reusable component for other dapps, a la postSvc.

Security Considerations

Scaling Considerations

Test Plan

Test with A3P and an Osmosis sim chain.

Dependencies

Preview Give feedback

1. Agoric Contract IBC Middleware #8583
   agoric-cosmos enhancement triaged_2024 +3
   
2. Docker environment for testing cross-chain orchestration #8896
   1 of 1
   +0
   
3. Add new Vtransfer module for notifications #8624
   automerge:no-update +1
   
4. bidirectional lookup of denoms / brands for IBC #9211
   enhancement +1
   
5. install XCS contract in multichain-testing #10127
   +0
   

Upgrade Considerations