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This means your payment has to have a lot of this random data to be able to support enough hops to navigate the entire network.
It also means that you can use this space to embed additional data in the payment that the recipient can access.
This means your payment has to have a lot of this random data to be able to support enough hops to navigate the entire network.
It also means that you can use this space to embed additional data in the payment that the recipient can access. This is how apps like Sphinx and Zion are able to implement messaging over the lightning network.