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feat(relay): implement autorelay #6156
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            dariusc93
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                    dariusc93
  
              
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                    Sep 12, 2025 
                  
              
              
            
            
              
                    dariusc93
  
              
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                    Sep 12, 2025 
                  
              
              
            
            
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  | ConnectionEvent::RemoteProtocolsChange(protocol) | ||
| | ConnectionEvent::LocalProtocolsChange(protocol) => { | 
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Should we check for only the remote protocol change instead of checking local and remote?
  
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Description
This PR implements a basic autorelay system that would automatically make reservation as soon as it is discovered that the connected node supports HOP protocol.
resolves #4651.
Notes & open questions
Currently, this PR is a PoC, but ideally would be the initial foundation for autorelay implementation. Currently, we will only support making reservation as we discover them, but ideally, we should implement events to notify swarm about no relays available, which would allow the node to perform its own discovery of relays (ie walking DHT, etc), as well as supporting static relays that would have priority or be used in the event of no relays being discovered, although it is all up for discussion to determine what is needed vs wants.
Change checklist