Summary
tinyminiscript rejects a valid wsh(multi(...)) descriptor when the keys are extended public keys instead of raw compressed pubkeys.
Minimal repro
wsh(multi(2,xpub661MyMwAqRbcFW31YEwpkMuc5THy2PSt5bDMsktWQcFF8syAmRUapSCGu8ED9W6oDMSgv6Zz8idoc4a6mr8BDzTJY47LJhkJ8UB7WEGuduB,xpub69H7F5d8KSRgmmdJg2KhpAK8SR3DjMwAdkxj3ZuxV27CprR9LgpeyGmXUbC6wb7ERfvrnKZjXoUmmDznezpbZb7ap6r1D3tgFxHmwMkQTPH))
Observed behavior
The parser rejects with:
InvalidKey { ... inner: "Invalid bitcoin::PublicKey key" }
Control case
A closely related raw-pubkey form is accepted:
wsh(multi(2,03a34b99f22c790c4e36b2b3c2c35a36db06226e41c692fc82b8b56ac1c540c5bd,03e7d285b4817f83f724cd29394da75dfc84fe639ed147a944e7e6064703b14130))
Cross-check
The xpub-key repro is accepted and compiled by:
rust-miniscriptbitcoin/bitcoinembitNBitcoin
Why this looks like a real bug
This is distinct from the generic multipath-xpub gap. The multi(...) parser branch reads each key with bitcoin::PublicKey::from_str(...) directly, so xpub-based key expressions never reach the extended-key parser used elsewhere in the crate.
Summary
tinyminiscriptrejects a validwsh(multi(...))descriptor when the keys are extended public keys instead of raw compressed pubkeys.Minimal repro
Observed behavior
The parser rejects with:
Control case
A closely related raw-pubkey form is accepted:
Cross-check
The xpub-key repro is accepted and compiled by:
rust-miniscriptbitcoin/bitcoinembitNBitcoinWhy this looks like a real bug
This is distinct from the generic multipath-xpub gap. The
multi(...)parser branch reads each key withbitcoin::PublicKey::from_str(...)directly, so xpub-based key expressions never reach the extended-key parser used elsewhere in the crate.