Cross-Subnet Transfers

Are there any docs discussing cross-subnet transfers via the X-Chain? I could only find docs/code related to transfers between the X, P, and C Chain on the “primary network”.

It seems like cross-subnet transactions could be more difficult on AVA because there is no record of validator attestations for each finalized block of data (like Cosmos IBC)?

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Avalanche doesn’t currently support cross-subnet transfers but it’s on the roadmap.

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Are there any high-level docs describing what this could look like (covering possible attack vectors and how they are remedied) or is it still too deep in the research phase?

Unfortunately no such docs are available yet

Any idea how long this will take?

I don’t have a hard timeline here, but probably not before the end of this year

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