Class DnsNodeDiscovery

Hierarchy

DnsNodeDiscovery

Index

Constructors

constructor

Properties

Methods

Constructors

constructor

new DnsNodeDiscovery(dns: DnsClient): DnsNodeDiscovery

- Defined in src/lib/discovery/dns.ts:68
Parameters
- dns: DnsClient
Returns DnsNodeDiscovery

Properties

Private Readonly _DNSTreeCache

_DNSTreeCache: {}

Type declaration

[key: string]: string

Private Readonly _errorTolerance

_errorTolerance: number = 10

Private Readonly dns

Methods

Private _getTXTRecord

_getTXTRecord(subdomain: string, context: SearchContext): Promise<string>

- Defined in src/lib/discovery/dns.ts:121
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>

Private _search

_search(subdomain: string, context: SearchContext): Promise<null | ENR>

- Defined in src/lib/discovery/dns.ts:77
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>

getPeers

getPeers(enrTreeUrls: string[], wantedNodeCapabilityCount: Partial<NodeCapabilityCount>): Promise<ENR[]>

- Defined in src/lib/discovery/dns.ts:47
Returns a list of verified peers listed in an EIP-1459 DNS tree. Method may return fewer peers than requested if 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 wantedNodeCapabilityCount plus the _errorTolerance factor.

Parameters
- enrTreeUrls: string[]
- wantedNodeCapabilityCount: Partial<NodeCapabilityCount>
Returns Promise<ENR[]>

Static dnsOverHttp

dnsOverHttp(endpoints?: Endpoints): DnsNodeDiscovery

- Defined in src/lib/discovery/dns.ts:35
Parameters
- Optional endpoints: Endpoints
Returns DnsNodeDiscovery

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