fix: handle oracle messages as a tlv #131
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bennyhodl
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kwsantiago
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Nov 25, 2025
| oracle_public_key: crate::ser_impls::read_schnorr_pubkey(reader)?, | ||
| signatures: { | ||
| let len: u16 = Readable::read(reader)?; | ||
| let mut signatures = Vec::with_capacity(len as usize); |
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No validation on len before allocating capacity?
| impl Readable for OracleAnnouncement { | ||
| fn read<R: bitcoin::io::Read>(reader: &mut R) -> Result<Self, DecodeError> { | ||
| let _type_id: u64 = BigSize::read(reader)?.0; | ||
| let _length: u64 = BigSize::read(reader)?.0; |
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On lines 252, 257, 502 the _length field is read but never validated?
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| let _type_id: u64 = BigSize::read(reader)?.0; | ||
| let _length: u64 = BigSize::read(reader)?.0; |
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Why is TLV header read twice?
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| let event_size = self.oracle_event.serialized_length(); | ||
| BigSize(self.oracle_event.type_id() as u64).serialized_length() + | ||
| BigSize(event_size as u64).serialized_length() + | ||
| event_size |
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Calculating the size manually could lead to buffer overflows.
| let mut cursor = Cursor::new(bytes); | ||
| let announcement = OracleAnnouncement::read(&mut cursor); | ||
| println!("{:?}", announcement); | ||
| assert!(announcement.is_ok()) |
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Should we add validation on whether the parsed content matches the expected values?
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| // fn read_oracle_message<T: Readable>(msg: MagnoliaResponse) -> Result<T, Error> { | ||
| // let bytes = hex::decode(msg.hex).map_err(|e| Error::OracleError(e.to_string()))?; | ||
| // let mut cursor = Cursor::new(bytes); | ||
| // let _type_id: u64 = lightning::util::ser::BigSize::read(&mut cursor).unwrap().0; | ||
| // let _length: u64 = lightning::util::ser::BigSize::read(&mut cursor).unwrap().0; | ||
| // T::read(&mut cursor).map_err(|e| Error::OracleError(e.to_string())) | ||
| // } | ||
| // impl_dlc_writeable!(OracleAnnouncement, { | ||
| // (announcement_signature, {cb_writeable, write_schnorrsig, read_schnorrsig}), | ||
| // (oracle_public_key, {cb_writeable, write_schnorr_pubkey, read_schnorr_pubkey}), | ||
| // (oracle_event, {cb_writeable, write_as_tlv, read_as_tlv}) | ||
| // }); |
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Is this worth keeping commented out versus deleting entirely?
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