[story] Support AMM trading in new smart wallet

[turadg]

What is the Problem Being Solved?

The new smart wallet doesn't yet support adding issuers, so it can't hold the brands of the AMM liquidity tokens.

We took out suggestIssuer for PSM launch to reduce upgrade risk. The plan for #6099 is to blow away and recreate the wallet contract. That requires that all assets are held at the Cosmos level so they can be re-associated with the JS purses. (Except for Invitations which are not held in Cosmos; they will be lost and have to be provided again.)

AMM liquidity tokens are not in Cosmos banks and thus would get blown away until we can retain non-Cosmos assets through upgrade.

Description of the Design

Depends on new upgrade capability:

• [requirement] smart wallets retain non-Cosmos assets through bulldozer upgrade #6131

The liquidity issuer could get into the wallet by a user calling suggestIssuer. Alternately the walletFactory could be aware of the canonical AMM and add its issuers automatically. The latter has the advantage of having trusted names, should we not support petnames at MN-1 launch.

Acceptance criteria

• wallet contract has AMM issuers and test-amm-integration does trades
• wallet UI has the liquidity tokens
• dapp-amm can use the above to trade in a browser

Security Considerations

Test Plan

[dckc]

The plan for #6099 is to blow away and recreate the wallet contract.

I wonder about that. My understanding of #6099 is that plan A is to use the Zoe contract upgrade stuff for the PSM contract alone.