exp/lighthorizon: Research Spike - Smart Contracts - Are txmeta archives usable by other tooling?

[paulbellamy]

This is a, "see how feasible" it is spike task.

It would be useful if we could use the lighthorizon txmeta-style archives for github.com/stellar/stellar-contract-cli instead of re-implementing captive-core in Rust. Maybe there is an opportunity to join forces there?

[Shaptic]

From an cursory glance, it seems like the main task to achieving this becomes reimplementing the ledgerbackend/HistoryArchiveBackend and its dependents in Rust in order to fetch from txmeta archives in a backend-agnostic way.

[paulbellamy]

MetaArchiveBackend now, right?

[paulbellamy]

From discussion and diagramming (Pink option 3), it seems like the answer is yes, we could. But we would have to implement MetaArchiveBackend (or whatever it is called), but more importantly current state ingestion in rust, so for now we're opting against this due to time constraints.

[Shaptic]

It'd be metaarchive.MetaArchive now, heh.

You would only need to write a subset of ingestion related to events, right? So mostly XDR parsing and some Pre/Post change stuff. I wouldn't expect it to be as significant as reimplementing the ingest package in Rust (which would definitely be massive).