Missing Plutus script version compatiblity

[SeungheonOh]

In Babbage ledger spec, at Figure 3, it states about "allowedLanguages" that indicates what different versions of scripts are allowed in a transaction depending on some of features transaction uses. Specifically, the spec say V1 and V2 scripts are allowed when transaction doesn't have reference script nor inline datum; only V2 scripts are allowed when transaction has reference script or inline datum.

Similar notation for Conway spec is needed so that developers can get a clear view on how a V3 script should be written to interact with older version scripts that are already deployed on chain.

[WhatisRT]

That's right, the big issue here is that we don't yet have support for multiple versions in the spec. There are a few more pressing issues and challenges associated with this, so it could be a while until we manage to fix this.

The general policy for Plutus versions is that we don't allow old Plutus versions to run in transactions that use new features.

[SeungheonOh]

Thanks!

Will specification for this land before Conway lunch? Or will Conway nodes launch without any set spec over this topics

[WhatisRT]

I don't know the planned timelines, so I'm not entirely sure. There'll probably be a push to get as many items as possible ironed out before the launch once we get close, and this ticket should be a part of that.

[SeungheonOh]

Okay, thanks for clarifying