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Add Plutus V4 support in the Dijkstra era - #1359
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scriptLanguageSupportedInEra and toScriptInEra accept Plutus V4 in Dijkstra, so V4 scripts can be used as witnesses, reference scripts and auxiliary scripts. cardano-ledger-dijkstra 0.4.0.0 carries the Plutus V4 field of the transaction witness set, so the Dijkstra round-trip properties pass. It still reads auxiliary scripts back only up to Plutus V3, so a V4 auxiliary script is dropped on read-back until a ledger release with the eraMaxLanguage bump. IntersectMBO/cardano-ledger#6109
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🟡 Changes recommended
The changelog should disclose the known V4 auxiliary-script read-back limitation.
1 open finding
What changed in this PR
Adds legacy API support for Plutus V4 scripts in the Dijkstra era.
Changes:
- Enables Plutus V4 in
scriptLanguageSupportedInEra. - Adds reference-script transaction-body coverage.
- Adds a compatible-feature changelog fragment.
| File | Description |
|---|---|
cardano-api/src/Cardano/Api/Plutus/Internal/Script.hs |
Enables the Dijkstra/V4 language pairing. |
cardano-api/test/cardano-api-test/Test/Cardano/Api/Transaction/Body/Plutus/Scripts.hs |
Tests preservation of a V4 reference script. |
.changes/plutus-v4-dijkstra-script-language-in-era.yml |
Documents the feature. |
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| - compatible | ||
| description: | | ||
| `scriptLanguageSupportedInEra` and `toScriptInEra` now accept Plutus V4 in the Dijkstra era. | ||
| Plutus V4 scripts can be used as reference scripts in transaction outputs and as auxiliary scripts. |
Jimbo4350
approved these changes
Oct 9, 2026
| Just PlutusScriptV2InDijkstra | ||
| (ShelleyBasedEraDijkstra, PlutusScriptLanguage PlutusScriptV3) -> | ||
| Just PlutusScriptV3InDijkstra | ||
| (ShelleyBasedEraDijkstra, PlutusScriptLanguage PlutusScriptV4) -> |
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We gotta kill this module after we release V12.
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scriptLanguageSupportedInEraandtoScriptInEranow accept Plutus V4 in the Dijkstra era.Plutus V4 scripts can be used as witnesses, reference scripts and auxiliary scripts; hashing, JSON encoding and ledger conversion already handled V4.
Known gap: cardano-ledger-dijkstra 0.4.0.0 reads auxiliary scripts back only up to Plutus V3, so a Plutus V4 auxiliary script in Dijkstra is dropped on read-back until cardano-api picks up a ledger release with the fix:
eraMaxLanguagetoPlutusV4, fix tests cardano-ledger#6109This PR builds on the merged change that makes cardano-api fail instead of dropping unsupported scripts:
Context
Found while adding Plutus V4 support to cardano-cli:
The ledger added the Plutus V4 field of the Dijkstra transaction witness set, released in cardano-ledger-dijkstra 0.4.0.0:
PlutusV4scripts totransaction_witness_setCDDL cardano-ledger#5403How to trust this PR
A property checks that
createTransactionBodyaccepts a Plutus V4 reference script on a Dijkstra output and keeps it on the ledger output.The Dijkstra round-trip properties generate Plutus V4 witness scripts and pass against cardano-ledger-dijkstra 0.4.0.0.
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