Without language_view, pallas does not compute script_data_hash on
the tx body. Plutus txs without script_data_hash get rejected with
ConwayUtxowFailure (PPViewHashesDontMatch SNothing (SJust ...)).
Caught 2026-05-07 attempting governor bootstrap on preprod against
Agora's V2 GST policy. Previous code only set language_view when
the policy was V3 — every V2 mint hit the chain rejection.
Three changes:
1. crates/aldabra-core/src/plutus_cost_models.rs — append
PLUTUS_V2_COST_MODEL_PREPROD constant (175 i64 entries), pulled
live from preprod Koios epoch_params 2026-05-07. Same protocol-
version convention as the existing V3 constant: V2 cost model
is identical mainnet vs preprod (cost models are protocol-version
parameters, not network), so the _PREPROD suffix is naming
convention, not a separation point.
2. crates/aldabra-core/src/plutus_mint.rs — replace the V3-only
language_view block with a per-PlutusVersion match. V2 wires
the new constant; V3 keeps the existing
params.plutus_v3_cost_model path; V1 left as TODO with a note
(no V1 mint use case yet).
3. crates/aldabra-dao/examples/dump_governor.rs — small cargo
example that encodes a sample GovernorDatum to CBOR hex via
the existing aldabra_dao::agora::GovernorDatum::to_plutus_data
path. Used during preprod DAO bringup to construct the inline
datum for the governor bootstrap tx. Edit values + re-run for
any DAO bringup. Builds against the existing pallas-codec
dev-dependency.
Kayos
ca2f69d28e