improve(sdk): add support for Multicall2 contract

[amateima]

Motivation

https://app.clubhouse.io/uma-project/story/2128/add-multicall-2-support-to-multicall-sdk-library

Summary

• add Multipart2 contract interface & types

Testing

Check a box to describe how you tested these changes and list the steps for reviewers to test.

• Ran end-to-end test, running the code as in production
• New unit tests created
• Existing tests adequate, no new tests required
• All existing tests pass
• Untested

[shortcut-integration]

This pull request has been linked to Clubhouse Story #2128: add multicall 2 support to multicall sdk library.

[daywiss]

sorry for the misunderstanding this morning, but yea i think it makes a lot of sense to separate m1 and m2 into separate folders. In my mind i had tasked this thinking you should also update the helper multicall class in lib which is what i was thinking of, but we can do that as a separate task.

anyways for the most part this looks good, but imo id say refactor it into separate clients. lmk what you think

[daywiss]

This looks great, just one comment on the new test

[nicholaspai]

Great first PR, I did one pass and mainly left comments to add more comments to the smart contracts. On second pass after you re-request my review, I'll examine the sdk code more closely

[mrice32]

Looks awesome! This is really really nice code, and very consistent with the surrounding code and style of the repo. Very nice work @amateima!!

Just added a few minor nits and comments.

[daywiss]

Looks great, going to approve assuming you will address rest of comments! Try to get a second approval before merging and you should be good to go

[mrice32]

LGTM!