CODEWITHSUNDEEP
ipfslibp2p
smakintel.com
smakintel.com

Reputation: 454

Can I keep the same Node ID (PeerId) in Helia - libp2p across restarts? I am using helia implementation of IPFS

Can I keep the same Node ID (PeerId) in Helia - libp2p across restarts? I am using Helia implementation of IPFS. Helia documentation really doesn't provide enough info on this. Helia forums also dones't have any info on this

Persist NodeId across every Restart

Upvotes: 1

Views: 103

Answers (1)

25x8
25x8

Reputation: 1

peerId generating by private key.

Look at the source code https://github.com/libp2p/js-libp2p/blob/635283461e87399c5cde6e729c4b993188e10168/packages/libp2p/src/index.ts#L41-L48

Here we see, that we should generate private key.

Try this

import {generateKeyPair, privateKeyFromRaw} from "@libp2p/crypto/keys";
import {Key} from "interface-datastore";

const KEY_NAME = new Key('privateKey');
export async function getOrCreatePrivateKey(datastore: FsDatastore) {
    try {
        const keyData = await datastore.get(KEY_NAME);

        // Key deserialization
        const privateKey = privateKeyFromRaw(keyData);

        console.log('Private key loaded from datastore.');
        return privateKey;
    } catch (error) {
        console.log('Private key not found, generating a new one.');

        // Generating a new key if it is not in the datastore
        const privateKey = await generateKeyPair('Ed25519');

        // Serialization and saving of a new key
        await datastore.put(KEY_NAME, privateKey.raw);

        console.log('Private key saved to datastore.');

        return privateKey;
    }
}

const libp2pNode = await createLibp2p({
        privateKey: await getOrCreatePrivateKey(datastoreCommonNode),
...

In this function we check if the private key exists, if not we generate a new one and store it locally. Thus, we have a persistent peerId.

Upvotes: 0

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