user64569: When a bitcoin core node is fully synced, does it broadcast to the rest of the network that is has finished syncing? If yes, where in the bitcoin-core source code is this implemented?

user10411: No. The nodes notify only about block height in the beginning of connection in version message. When node wants to notify about new block/tx it received/created, it uses inv message.
There is no point to notify other peers about downloading full blockchain. Other nodes have nothing to do with such information.

64569: <p>When a bitcoin core node is fully synced, does it broadcast to the rest of the network that is has finished syncing? If yes, where in the bitcoin-core source code is this implemented?</p>
 10411: <p>No. The nodes notify only about block height in the beginning of connection in <code>version</code> message. When node wants to notify about new block/tx it received/created, it uses <code>inv</code> message.</p>

<p>There is no point to notify other peers about downloading full blockchain. Other nodes have nothing to do with such information.</p>
