Commits on Jan 7, 2022

1. BOLT 1: adds remote address to optional init_tlvs …

   This adds the option to report an remote IP address back to a connecting
   peer using the `init` message. A node can decide to use that information
   to discover a potential update to its public IPv4 address (NAT) and use
   that for a `node_announcement` update message containing the new address.
   
   The proposal includes reporting the IPv4 and IPv6 address,
   however in IPv6 there are likely no NAT issues. TOR is skipped for
   obvious reasons.
   
   Certain approaches to check and use this information are thinkable:
    - Wait for multiple peers or a certain fraction to report the
      same new address.
    - Check some random node known via gossip to also report the new
      address.
    - Verify this information by making a test connection to itself.

   

   m-schmoock committed Jan 7, 2022
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