Class DnsNodeDiscovery

Hierarchy

DnsNodeDiscovery

Index

Constructors

Properties

_DNSTreeCache _errorTolerance dns

Methods

_getTXTRecord _search getNextPeer getPeers dnsOverHttp

Constructors

constructor

new DnsNodeDiscovery(dns: DnsClient): DnsNodeDiscovery
Parameters
- dns: DnsClient
Returns DnsNodeDiscovery
- Defined in packages/dns-discovery/src/dns.ts:79

Properties

`Private` `Readonly` _DNSTreeCache

_DNSTreeCache: {
[key: string]: string;
}

Type declaration

[key: string]: string

`Private` `Readonly` _errorTolerance

_errorTolerance: number = 10

`Private` `Readonly` dns

Methods

`Private` _getTXTRecord

_getTXTRecord(subdomain: string, context: SearchContext): Promise<string>
Retrieves the TXT record stored at a location from either this DNS tree cache or via DNS query.

Throws
if the TXT Record contains non-UTF-8 values.
Parameters
- subdomain: string
- context: SearchContext
Returns Promise<string>
- Defined in packages/dns-discovery/src/dns.ts:156

`Private` _search

_search(subdomain: string, context: SearchContext): Promise<null | ENR>
Runs a recursive, randomized descent of the DNS tree to retrieve a single ENR record as an ENR. Returns null if parsing or DNS resolution fails.
Parameters
- subdomain: string
- context: SearchContext
Returns Promise<null | ENR>
- Defined in packages/dns-discovery/src/dns.ts:112

getNextPeer

getNextPeer(enrTreeUrls: string[], wantedNodeCapabilityCount: Partial<NodeCapabilityCount>): AsyncGenerator<IEnr, any, unknown>
Returns a list of verified peers listed in an EIP-1459 DNS tree. Method may return fewer peers than requested if
Parameters
- enrTreeUrls: string[]
- wantedNodeCapabilityCount: Partial<NodeCapabilityCount>
Returns AsyncGenerator<IEnr, any, unknown>
- Defined in packages/dns-discovery/src/dns.ts:87

getPeers

getPeers(enrTreeUrls: string[], wantedNodeCapabilityCount: Partial<NodeCapabilityCount>): Promise<IEnr[]>
Returns a list of verified peers listed in an EIP-1459 DNS tree. Method may return fewer peers than requested if

Link
wantedNodeCapabilityCount requires larger quantity of peers than available or the number of errors/duplicate peers encountered by randomized search exceeds the sum of the fields of

Link
wantedNodeCapabilityCount plus the

Link
_errorTolerance factor.
Parameters
- enrTreeUrls: string[]
- wantedNodeCapabilityCount: Partial<NodeCapabilityCount>
Returns Promise<IEnr[]>
- Defined in packages/dns-discovery/src/dns.ts:50

`Static` dnsOverHttp

dnsOverHttp(dnsClient?: DnsClient): DnsNodeDiscovery
Parameters
- Optional dnsClient: DnsClient
Returns DnsNodeDiscovery
- Defined in packages/dns-discovery/src/dns.ts:36

Generated using TypeDoc