Print friendly stderr message when future-pparams returns null#1344
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Print friendly stderr message when future-pparams returns null#1344
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When there are no protocol parameter changes to be enacted at the next epoch boundary, print a human-friendly message to stderr while keeping the null output on stdout for script compatibility. Closes #1061
Jimbo4350
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carbolymer,
disassembler,
kevinhammond,
newhoggy and
palas
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Pull request overview
This PR improves the UX of conway query future-pparams when there are no pending protocol parameter changes by emitting a human-friendly informational message to stderr while preserving null on stdout for scripting compatibility.
Changes:
- When
query future-pparamsreturnsNothing(encoded asnull), print an informational message tostderr. - Keep the existing
stdoutoutput unchanged (null) to avoid breaking scripts.
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carbolymer
approved these changes
Mar 6, 2026
palas
approved these changes
Mar 6, 2026
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palas
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Indeed, a Nothing seems to represent the future pparams will not change: https://cardano-ledger.cardano.intersectmbo.org/cardano-ledger-shelley/Cardano-Ledger-Shelley-Governance.html#t:FuturePParams
Also here: https://cardano-ledger.cardano.intersectmbo.org/cardano-ledger-api/src/Cardano.Ledger.Api.State.Query.html#queryFuturePParams
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Changelog
Context
When
query future-pparamsreturnsnull(no pending protocol parameter changes), the CLI now prints a human-friendly message tostderr:stdoutstill outputsnullfor script compatibility, as discussed in the issue.Closes #1061
Checklist