fix: change output selection and dust threshold logic #2065
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aagbotemi
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Oct 23, 2025
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aagbotemi
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aagbotemi
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Great work @famouswizard. I left a comment for your review.
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+345
to
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| let drain_weights = match change_desc.witness_version() { | ||
| Some(WitnessVersion::V1) => DrainWeights::TR_KEYSPEND, | ||
| Some(WitnessVersion::V0) => DrainWeights::WITNESS_V0_KEYSPEND, | ||
| None => DrainWeights::LEGACY_KEYSPEND, | ||
| _ => DrainWeights::TR_KEYSPEND, | ||
| }; |
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This code fails to compile due to missing APIs
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oleonardolima
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Are you still working on this one ? Please mind @aagbotemi comment above.
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Description
Keychain::Internalinstead of.last()- avoids random external change or panics when no internal descriptor is present.DrainWeightsnow matches the change address type (taproot, segwit, legacy) for accurate fee and dust estimates.>to>=so exact dust-sized change isn’t lost to fees.Notes to the reviewers
small but important cleanup for more predictable change handling and fee estimation. Worth double-checking test coverage for non-taproot outputs.
Changelog notice
fix incorrect change keychain selection, fee estimation, and dust threshold comparison.
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