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cloudhead / nakamoto

Privacy-preserving Bitcoin light-client implementation in Rust

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Prefer low-latency peers

cloudhead opened this issue · comments

commented

Currently, peer latency is measured in the PingManager, but not used.

  • We should keep track of latencies, persist them (either in the client::peer::Cache or some where else.
  • Use it to decide which peers to connect to
  • Use it to decide which peers to download headers/blocks from

Some notes:

  • We should generally not compromise geo-diveristy when looking for low-latency peers, but having a few low-latency peers is desired
  • Low-latency peer selection can either be via AddressManager::sample being biased towards low-latency peers, or by simply calling sample 2-3 times and picking the peer with the lowest latency.