BIP 345: Fix OP_VAULT_RECOVER specification for the recovery-sPK-hash #1797
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The recovery scriptPubKey needs to be prefixed with its CompactSize-encoded length.
jonatack
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Proposed BIP modification
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cc @jamesob for feedback |
murchandamus
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the
PR Author action required
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Looks good to me - doesn't hurt to keep updated. |
jonatack
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Pending acceptance
jonatack
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Aug 8, 2025
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The recovery scriptPubKey needs to be prefixed with its CompactSize-encoded length when computing the sPK hash.
I verified this by:
recovery_spk_tagged_hash()is implemented usingser_string()which adds the CompactSize-encoded length prefixOP_VAULT_RECOVERand broadcasting it to mutinynet (see line 2 for the recovery sPK hash computation)Alternatively, the implementation could be amended to match the current specification and drop the length prefix. Since this is committing to a single element, the length isn't really necessary.