This commit improves TLV decoding safety and consistency across multiple
packages by enforcing fixed-length requirements and adding unit tests to
prevent malformed TLV records from being accepted.
Changes include:
- lnwire:
* Enforce 8-byte length in Fee TLV decoder.
* Enforce PubNonceSize in Musig2Nonce TLV decoder.
* Enforce 8-byte length in ShortChannelID TLV decoder.
* Added roundtrip and invalid length tests for Fee, Musig2Nonce,
and ShortChannelID records.
- routing/route:
* Enforce Vertex TLV length (33 bytes).
* Added encode/decode and invalid length tests for Vertex.
- tlv:
* Enforce correct length in DBytes33 decoder (33 bytes).
* Added tests ensuring all fixed-size primitive decoders reject
incorrect TLV lengths.
By strictly validating TLV lengths, we prevent malformed or corrupted
TLV records from being silently accepted, improving protocol safety.
routing
The routing package implements authentication+validation of channel announcements, pruning of the channel graph, path finding within the network, sending outgoing payments into the network and synchronizing new peers to our channel graph state.
Installation and Updating
$ go get -u github.com/lightningnetwork/lnd/routing