Add Cannon

[kaze-cow]

This contract is particularly challenging because it has . I wanted to replicate the checks that we do in the script (ex. checking that wrappedNativeToken is actually a WETH contract or something that could concievably be one), but this has turned out to be challenging with the current limitations.

Out of Scope

The CI will come later.

Native Token verification in the Cannonfile turned out to be quite challenging as things are, so saving this for a future PR as we approach more networks.

How to Test

To build the cannon package, it currently cowprotocol/contracts#257, so go over there and follow the build instructions for the cannon package there first. (once the package is published there, it will no longer be necessary to build separately)

Then build:

yarn install
yarn build # runs cannon build
yarn cannon:record

You may need to create the cannon/ directory for the last command to succeed.

Also check the docs, see if they are reasonable 👍

[github-actions]

All contributors have signed the CLA ✍️ ✅
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[kaze-cow]

I have read the CLA Document and I hereby sign the CLA

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	@​usecannon/​cli@​2.26.0-alpha.0

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