libp2p/dist/src/get-peer.js

JavaScript implementation of libp2p, a modular peer to peer network stack

import { InvalidMultiaddrError, InvalidParametersError, isPeerId } from '@libp2p/interface';
import { peerIdFromString } from '@libp2p/peer-id';
import { isMultiaddr } from '@multiformats/multiaddr';
import { PEER_ID } from '@multiformats/multiaddr-matcher';
/**
 * Extracts a PeerId and/or multiaddr from the passed PeerId or Multiaddr or an
 * array of Multiaddrs
 */
export function getPeerAddress(peer) {
    if (isPeerId(peer)) {
        return { peerId: peer, multiaddrs: [] };
    }
    let multiaddrs = Array.isArray(peer) ? peer : [peer];
    let peerId;
    if (multiaddrs.length > 0) {
        const peerIdStr = multiaddrs[0].getPeerId();
        peerId = peerIdStr == null ? undefined : peerIdFromString(peerIdStr);
        // ensure PeerId is either not set or is consistent
        multiaddrs.forEach(ma => {
            if (!isMultiaddr(ma)) {
                throw new InvalidMultiaddrError('Invalid multiaddr');
            }
            const maPeerIdStr = ma.getPeerId();
            if (maPeerIdStr == null) {
                if (peerId != null) {
                    throw new InvalidParametersError('Multiaddrs must all have the same peer id or have no peer id');
                }
            }
            else {
                const maPeerId = peerIdFromString(maPeerIdStr);
                if (peerId?.equals(maPeerId) !== true) {
                    throw new InvalidParametersError('Multiaddrs must all have the same peer id or have no peer id');
                }
            }
        });
    }
    // ignore any `/p2p/Qmfoo`-style addresses as we will include the peer id in
    // the returned value of this function
    multiaddrs = multiaddrs.filter(ma => {
        return !PEER_ID.exactMatch(ma);
    });
    return {
        peerId,
        multiaddrs
    };
}
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