libp2p
Version:
JavaScript implementation of libp2p, a modular peer to peer network stack
54 lines • 1.79 kB
JavaScript
import { multiaddr, resolvers } from '@multiformats/multiaddr';
import { convertToIpNet } from '@multiformats/multiaddr/convert';
/**
* Recursively resolve DNSADDR multiaddrs
*/
export async function resolveMultiaddrs(ma, options) {
// check multiaddr resolvers
let resolvable = false;
for (const key of resolvers.keys()) {
resolvable = ma.protoNames().includes(key);
if (resolvable) {
break;
}
}
// return multiaddr if it is not resolvable
if (!resolvable) {
return [ma];
}
const output = await ma.resolve(options);
options.log('resolved %s to', ma, output.map(ma => ma.toString()));
return output;
}
/**
* Converts a multiaddr string or object to an IpNet object.
* If the multiaddr doesn't include /ipcidr, it will encapsulate with the appropriate CIDR:
* - /ipcidr/32 for IPv4
* - /ipcidr/128 for IPv6
*
* @param {string | Multiaddr} ma - The multiaddr string or object to convert.
* @returns {IpNet} The converted IpNet object.
* @throws {Error} Throws an error if the multiaddr is not valid.
*/
export function multiaddrToIpNet(ma) {
try {
let parsedMa;
if (typeof ma === 'string') {
parsedMa = multiaddr(ma);
}
else {
parsedMa = ma;
}
// Check if /ipcidr is already present
if (!parsedMa.protoNames().includes('ipcidr')) {
const isIPv6 = parsedMa.protoNames().includes('ip6');
const cidr = isIPv6 ? '/ipcidr/128' : '/ipcidr/32';
parsedMa = parsedMa.encapsulate(cidr);
}
return convertToIpNet(parsedMa);
}
catch (error) {
throw new Error(`Can't convert to IpNet, Invalid multiaddr format: ${ma}`);
}
}
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