Lightning Network Interoperability Initiative Charter

Goals

This working group exists to ensure that Lightning Network implementations are compliant with the protocol and are interoperable between different implementations.

Up to this point, the Lightning Network has been tested based on real-world experiences, aside from the integration testing that each implementation includes within its own codebase.

While tests like these are essential—because there are scenarios that can only be discovered when testing on the Bitcoin network, such as a "Fee Spike"—there are numerous cases where potential issues could be identified before deploying an implementation in a real-world setting.

An example of this is the recent splicing issues https://github.com/ElementsProject/lightning/issues/6500 between CLN and Eclair.

The primary objective of this working group is to develop testing tools that are language-agnostic and can facilitate the following types of integration tests:

• Vertical Integration Testing: An implementation must be tested alongside other implementations.
• Horizontal Integration Testing: An implementation must be tested with a protocol testing framework to ensure that the specification is clear and that the implementation adheres to the specification correctly. An example of this is the following PR on CLN https://github.com/ElementsProject/lightning/pull/6384 were lnprototest was able to hit an edge case and allow core lightning to accept invalid signature during the announcement_signatures
• Self Integration Testing: An implementation must be tested for compliance with its own standards (note: most major implementations are currently doing this).

Membership