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bootstrap.ts
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bootstrap.ts
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import Multiaddr from 'multiaddr'
import dns from 'dns'
const FULL_VERSION = require('../package.json').version
const packageVersion = FULL_VERSION.split('.')
const cleanVersion = packageVersion[0] + '.' + packageVersion[1] + '.' + packageVersion[2].split('-')[0] // Handle `-next` on patch.
const BOOTSTRAP_ADDRESS = process.env.HOPR_BOOTSTRAP_ADDRESS || `${cleanVersion}-bootstrap.hoprnet.link`
/** Load Bootstrap node addresses.
* - If a string of comma separated multiaddrs is passed, use this first
* - If there are ENV Variables, use them second
* - Otherwise look at the DNS entry for our testnet.
*/
export async function getBootstrapAddresses(addrs?: string): Promise<Multiaddr[]> {
let addresses: string[]
if (addrs) {
addresses = addrs.split(',')
} else if (process.env.HOPR_BOOTSTRAP_SERVERS !== undefined) {
addresses = process.env.HOPR_BOOTSTRAP_SERVERS.split(',')
} else {
// Fall back to DNS
let records = await dns.promises.resolveTxt(BOOTSTRAP_ADDRESS)
addresses = records.map((r) => r[0].replace('dnsaddr=', ''))
}
if (addresses.length == 0) {
throw new Error('Bootstrap Addresses could not be found')
}
return addresses.map((a: string) => Multiaddr(a.trim()))
}