Add CCIP-Read Tunneling

[adraffy]

• added utils/ccipTunnel.ts and tests
  • exposes ccipReadTunnel()

---

Usage:

// <meta http-equiv="Content-Security-Policy" content="connect-src 'self' <batchGateway>;">
createClient({
   ccipRead: ccipReadTunnel({ batchGateways: [<batchGateway>] })
});

→ routes ALL CCIP-Read OffchainLookup requests through <batchGateway>.

---

Note: CCIP-Read is not ENS-specific.

[changeset-bot]

🦋 Changeset detected

Latest commit: 5097d11

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
viem	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[vercel]

@adraffy is attempting to deploy a commit to the Wevm Team on Vercel.

A member of the Team first needs to authorize it.

[pkg-pr-new]

Open in StackBlitz

npm i https://pkg.pr.new/viem@4551

commit: 6fb38ab

[jxom]

one small nit

[adraffy]

Oh cool, does the idea make sense? It could technically be an external library since the code is independent but I think it's actually useful for frontend applications (and will get use as there's an increased desire to lock frontends down) and the new code is only a small addition.

I have a matching solution for ethers for solving the same problem (CSP).

---

This will be standardized as part of ENSIP-21 but I'm thinking about writing an ERC, since it's actually a security improvement on ERC-3668 (although ENSIP-21 itself was too, and I didn't write one.)

[adraffy]

What can be done here? I'm getting spammed with Github emails

Edit: thanks!