Bitcoin Network

Node Function

A node in Bitcoin network could have 4 functions.

  • routing
  • blockchain database
  • mining
  • wallet service
FullNode.JPG

All node has routing function.
Full Node has all of them.
SPV/Lightweight node maintain a subset of blockchain.

Extended Bitcoin Network

The whole bitcoin network topology.

node.jpg

Network Discover

A new node use version message(handshake) to connect an old node. The Bitcoin Core client contains the names of five different DNS seeds.

handshake.JPG

Then use addr/get addr message to propagate address.

addr.JPG

Nodes sync data as follows

block_sync.JPG
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