CDDL for plutus scripts

[JaredCorduan]

We may want to consider separating plutus scripts in the CDDL specification using a tagged alternative instead of just adding to the map. In other words, instead of adding , ? 6: [* plutus_script_v2 ] to

https://github.com/input-output-hk/cardano-ledger/blob/d34978e4ca0ced84aa3e5586feb7b3382a76f367/eras/alonzo/test-suite/cddl-files/alonzo.cddl#L260-L267

we use:

tagged_script = #6.whatever plutus_v1_script / #6.whatever plutus_v2_script

transaction_witness_set =
  { ...
  ,  3: [* tagged_script ]
  }

We could also lump native scripts in with the alternative as well, but we need to think about backwards compatibility.

[JaredCorduan]

I had forgotten the history of this topic when I made this issue. The original design was deliberate, it reduces redundancy on the wire (no repeated tags).