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lightning/TODO.md

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Looking for things to hack on?

I've marked things as simple if you want something easy to work on!

Cleanups

  • Wean off openssl's -lcrypto

    • (simple) use libsodium for all RNG
    • (simple) use libbase58

  • Remove our specific libsecp256k1 in secp256k1/ and use the installed one.

    • Implement sig_valid, using secp256k1_ecdsa_signature_normalize
    • Use secp256k1_ecdsa_signature_parse_compact/_serialize_compact in signature_to_proto

Minor improvements

  • Make json_get_params fail if unknown parameters are specified by user.
  • Print backtrace in log_crash
  • When unpacking a packet, reject any with an unknown odd-numbered field as per BOLT #2.
  • Provide details (string) when a command fails because state() returns CMD_FAIL
  • Limit total number of peers in new_peer, or at least in peer_connected_in.
  • logging: add IO logging for peers.
  • Add history RPC command which shows all prior commit txs.
  • Improve getpeers to show status of peers when connecting, DNS lookups etc.
  • Add pings to protocol
    • Timeout a peer if they don't respond in a given time (eg. 2 pings)

Testing:

  • Add more unit tests in bitcoin/test.
  • Test more scenarios with daemon/test/test.sh
  • Implement compile-time crypto-free mode
    • Implement canned conversation files for fuzz testing (eg AFL).
  • Write canned input/output test cases for various conversations, and include them in a form suitable for other implementations to test.

Major improvements:

  • Don't fail funding if fees insufficient, fall back as per BOLT #2.

  • (MAJOR) Implement onion

    • (MAJOR) Implement failure messages

Other

Happy hacking!
Rusty.