feat(apis/vara-eth): add support for uploading codes in EIP-7594 format

[StackOverflowExcept1on]

This works in apis/vara-eth and passes all tests. It also fixes the blob codec to support codes larger than 128 KiB (this is AI-generated code, so it would be nice to test it).

Currently, this fix in apis/vara-eth relies on wevm/viem#4022. I forked viem here and resolved all merge conflicts: https://github.com/StackOverflowExcept1on/viem/tree/feat/eip-7594-support-for-blob-txs. It would be nice to create our own package like @vara-eth/viem and use it everywhere instead of the current fork.

As for the frontend, since apis/vara-eth uses kzg-wasm, we need to load this .wasm in the browser. It works in production builds, but is broken in yarn start (dev builds). Therefore, I added serveKzgWasmFromViteCachePath as a temporary solution. kzg-wasm also doesn't work well with nodePolyfills(): ethereumjs/kzg-wasm#28, so I disabled process in nodePolyfills(). This is also a temporary solution, so we need to somehow make the frontend configs configurable.

There is also an issue that MetaMask currently doesn't support EIP-4844 transactions: MetaMask/core#8331. I think we could solve this based on this context:

• http://github.com/MetaMask/core/pull/5285
• https://github.com/MetaMask/core/blob/751ca3b9258603457507742824352230ae0206ff/packages/transaction-controller/src/utils/validation.ts#L140
• https://github.com/MetaMask/core/blob/751ca3b9258603457507742824352230ae0206ff/packages/transaction-controller/src/types.ts#L1298

[gemini-code-assist]

Code Review

This pull request implements code validation functionality, including a new frontend upload feature and updates to the RouterClient to support EIP-4844 transactions. Key changes involve adding the UploadCodeButton component, the useUploadCode hook, and updating the viem dependency to a specific PR build across multiple packages. Review feedback focuses on the risks of using non-standard dependency versions and wildcard peer dependencies, a potential race condition in the frontend transaction logic, and the importance of maintaining a pinned Rust toolchain for build reproducibility. Suggestions were also made to improve error handling and avoid hardcoding transaction parameters.