Ethereum: How to set peer-to-peer synchronization to true?

Setting the Syncnode of a Peer to True

As a network administrator or developer, ensuring that your Ethereum testnet connection is properly configured for synchronization with other nodes can be crucial for maintaining data consistency and preventing orphaned blocks. In this article, we will walk you through the process of setting the sync node of a peer to true on a testnet connection.

What is Sync Node?

In Ethereum, a
sync node

is a node that acts as an intermediary between other nodes in the network, relaying data and ensuring that all nodes are synchronized. When a client connects to a sync node, it can request information about other clients connected to the same node, including their addresses, services, and last sent timestamps.

Why Set Sync Node to True?

Setting the sync node of a peer to true ensures that:

• All nodes in the network are aware of each other’s presence and connections.

• Data from each client is propagated through the network and made available for synchronization by other clients.

• Orphaned blocks, which can occur when a node disconnects or is reconnected, are removed from the network.

Step-by-Step Guide

To set the sync node of a peer to true on your testnet connection, follow these steps:

1.
Get Peer Information

First, you need to retrieve information about the peer that you want to synchronize with. You can do this using the getpeerinfo command in Ethereum’s console or through an API call.

eth console -q getpeerinfo 

Replace with the address of your testnet peer.

2.
Parse Peer Information

The output from the getpeerinfo command will contain a JSON object containing various information about the peer, including its addresses and services.

{

    "addr": "172.20.61.111:63379",

    "services": "00000001",

    "lastsend": ...

}

In this example:

• addr is the address of the peer.

• services indicates that this peer uses the 0x services (e.g., ETH, Ether).

• lastsend provides information about the last time this client sent a message.

3.
Create Sync Node

To set the sync node of the peer to true, you need to create an instance of a SyncNode class that connects to your testnet connection. You can use the following code as a starting point:

const Network = require('ethers');

const { SyncNode } = require('./sync-node.js');


async function main() {

    const networkConfig = new Network.Web3.providers.HttpProvider('

    const client = new Network.Client(networkConfig);


    // Create a sync node instance

    const syncNode = new SyncNode(client, '0x00000001', 1); // Replace with your services


    // Set the sync node to true

    syncNode.setSyncNode(true);

}


main().catch((error) => console.error(error));

Make sure to replace YOUR_PROJECT_ID with your actual Ethereum testnet project ID.

4.
Update Peer Information

Finally, you need to update the peer information in the JSON object obtained earlier by setting its services field to 1 (or another valid service code). You can do this using a small JavaScript function:

function setServices(peerInfo) {

    if (!peerInfo.services || !peerInfo.services.includes('eth')) {

        // Set services to ETH, if not already present

        peerInfo.services = ['eth'];

    }


    return peerInfo;

}


// Update the peer information with services set to 1

const updatedPeerInfo = setServices({ ...peerInfo });

console.log(updatedPeerInfo);

Conclusion

By following these steps and using the SyncNode class, you can easily set the sync node of a peer to true on your Ethereum testnet connection.

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