How to integrate layer2 solution with other blochkchian protocol or other network

I search many blogs, website, and tutorial but not get any solution regarding
what steps should keep in mind to integrate Two network /protocol how can achieve interoperability for scaling solution.

one layer2 solution can provide off-chain Computation and it is Onchain for store state except this I have no idea to go-ahead.

SO IF ANYBODY HAVE ANSWER OF THIS QUESTION PLZ REPLY OR SHARE LINK.

THANKS IN ADVANCE

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Not sure if you’re asking the interoperability between layer-1 and layer-2 or between two layer-2 protocols?

The layer-2 projects we see today are not mature, most of them are in prototype phase and is highly coupled to a certain blockchain. A layer-2 project may add support for multiple blockchains and become layer-1 agnostic, or some 3rd-party will clone it onto a different blockchain.

The interoperability between layer-2 protocols is an important but non-urgent problem because we don’t even have a mature layer-2 project yet. It’s a problem on our radar too. There’re some common things we need for this two interoperability problems, such as networking protocol. However the interoperability between layer-2 is more trickier than the interoperability between layer-1 and layer-2, because we don’t know what will a global layer-2 network look like yet - what’s the role of different layer-2 protocols, e.g. channels and chains, in this layer-2 network? How do channels interact with chains?