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for the propagation process between nodes in the networks, witch application layer protocol they use, HTTP or WebSocket?

And if they use WebSocket, does each node maintain a continuous connection with each of the other nodes?

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    Used Bitcoin protocol over TCP/IP protocol. You can read more on this link https://en.bitcoin.it/wiki/Protocol_documentation#Message_types

    • the OP is asking about application level, not infrastructure / TCP/IP layer. Probably a link to the code would help more, to understand how listeners are opened for incoming messages? – pebwindkraft Jul 4 '18 at 14:26
    • Nodes not use HTTP or WebSocket protocol. Nodes connect over TCP/IP and start handshake en.bitcoin.it/wiki/Version_Handshake – bitaps.com Jul 4 '18 at 18:38

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