How to gather all addresses of nodes in a private network?

Question

I am currently learning core-development in go-ethereum. I am a little weak with networking, RPC and connections.

I am trying to write a function in my own consensus mechanism that gathers all currently connected node addresses into a struct and then uses it to display them. it currently has a structure like this.

type NodeAddresses struct {
    connectedNode []ConnectedNode
}

type ConnectedNode struct {
    address common.Address
}  

func GatherNodeAddresses() {
    nodes := &NodeAddresses{
        ......
    }

}

What I'm having trouble with is how to populate the struct of NodeAddresses with connecting nodes in a private network. Each node has their own personal account set up with an address. Could someone give me an insight of how to move forward from here? Cheers!

Yep, all nodes are connected as peers using admin.addPeer("enode...") etc — Yanzal, Dec 06 '18 at 20:10

score 3 · Answer 1 · answered Dec 07 '18 at 04:40

You can use an approach similar to graph traversal https://en.wikipedia.org/wiki/Graph_traversal

Connect to a node, add it to "knownNodes" map
Find peers for this node Get a peer list for my geth node
For each peer, if peer does not already exist in "knownNodes", perform steps #1 and #2

How to gather all addresses of nodes in a private network?

1 Answers1