refactor(utxo-staking): classify PoX-5 recovery branches - #9669
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Add the native PoX-5 spend-branch classifier required by the thin Wallet Platform adapter. The classifier revalidates the descriptor-bound input and distinguishes the locktime branch from the principal-preimage early-exit branch using native PSBT_IN_SHA256 metadata. Add unit coverage for both native metadata states. Wallet Platform remains responsible for request and wallet policy, legacy conversion boundaries, and error translation; it does not parse PoX-5 descriptors or raw PSBT key-value data. Refs: WAL-2024
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veetragjain
approved these changes
Sep 7, 2026
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Add the native PoX-5 spend-branch classifier required by the thin Wallet
Platform adapter. The classifier revalidates the descriptor-bound input and
distinguishes the locktime branch from the principal-preimage early-exit
branch using native PSBT_IN_SHA256 metadata.
Add unit coverage for both native metadata states. Wallet Platform remains
responsible for request and wallet policy, legacy conversion boundaries, and
error translation; it does not parse PoX-5 descriptors or raw PSBT key-value
data.