Neutrino

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Alert! Be careful!
There are multiple known major issues with the client, so it is not recommended to use it with real money at this point.

Neutrino is an experimental Bitcoin light client written in Go and designed with mobile Lightning Network clients in mind. It uses a new proposal for compact block filters to minimize bandwidth and storage use on the client side, while attempting to preserve privacy and minimize processor load on full nodes serving light clients.

The light client synchronizes only block headers and a chain of compact block filter headers specifying the correct filters for each block. Filters are loaded lazily and stored in the database upon request; blocks are loaded lazily and not saved.

Unlike full nodes which have a full historical record of transactions, lightweight nodes only sync block headers and use a method called Simple Payment Verification

https://github.com/lightninglabs/neutrino