Remove anchor tx

[Brechtpd]

I think the Alethia design gets simpler if the anchor transaction doesn't exist and onchain parts are done through a system call like EIP-4788 (https://eips.ethereum.org/EIPS/eip-4788).

Certain logic done in the anchor tx can also just be done in the node directly when that makes sense (e.g. calculate the new base fee). This allows reusing code that already exists in the node vs needing a solidity implementation as well.

[cyberhorsey]

100%

[davidtaikocha]

Agreed, and for nodes like reth, this is really simple to implement, so shouldn't be a big issue for the proving system to change too.

[dantaik]

Lets do it. I think this is easy with reth - I'm considering giving up taiko-geth :D

[dantaik]

@Brechtpd triage check 👋 — trying to move this one forward.

This proposes removing the anchor tx in favor of an EIP-4788-style system call. Shasta shipped with a versioned anchor (anchorV4) instead, so the proposal wasn't adopted.

Is removing the anchor still a direction you'd like to keep on the roadmap, or should we close this as superseded by the current Shasta design?