Add Support for EIP-1153 (Transient Storage) in the FEVM (FIP-0097)

[snissn]

Abstract

EIP-1153 defines transient storage as temporary data accessible only during the originating transaction, cleared automatically at the end of the transaction. This FIP adapts transient storage to the FEVM using TLOAD and TSTORE opcodes, ensuring compatibility with Ethereum contracts and libraries that rely on this feature. Lifecycle validation mechanisms enforce the transaction-scoped behavior of transient storage, achieving functional equivalence with Ethereum’s implementation and seamless integration with Filecoin’s architecture.

Discussion:

• EIP-1153: Transient Storage #855

[rvagg]

👍 excellent; just some inline notes about some things I think are missing from here

[snissn]

Thanks for the comments @rvagg ! Your feedback helps clarify many important aspects of this FIP and leaves to a more robust proposal overall! I got a little "nerd sniped" by the solidity version relationship to this FIP, and hope I didn't get too nuanced and abstract! Please share any additional comments and feedback to ensure all of your requests and ideas have been addressed and accommodated! Thanks again!

[luckyparadise]

@snissn one nit question I have is using "ephemeral" and "transient". Do they mean the same thing in the context of the FIP or do they mean separate concepts?

[jsoares]

Nothing substantive to add to @rvagg's excellent feedback. Provided the outstanding comments are addressed, this looks good to go.

[jsoares]

Assigning FIP-0097. Please update PR title, filename, front matter, and readme.

[snissn]

@luckyparadise thanks for your question! Reviewing the writing I see that the word usage of ephemeral can be creating confusion witihout adding much to the document.

Transient storage is the technical term that has technical meaning. My intention behind my usage of ephemeral in this FIP write up was to be a descriptive term that doesn't insist on a precise technical purpose per se. I think it's an attempt I made to create a category for memory data and transient data that would be separate from storage data..

I think I can just delete the three instances of the word ephemeral in the FIP write up and it removes ambiguity and nothing is lost. Changed here b69533d

[anorth]

Editorial 👍