utils

Documentation

Index

• Constants
• Variables
• func DecodeHexString(input string) ([]byte, error)
• func EcdsaPrivKeyToSecp256k1PrivKey(privKey *ecdsa.PrivateKey) *crypto.Secp256k1PrivateKey
• func EcdsaPubKeyToSecp256k1PublicKey(pubKey *ecdsa.PublicKey) *crypto.Secp256k1PublicKey
• func EnodeToPeerInfo(node *enode.Node) (*peer.AddrInfo, error)
• func GetNTPMetadata() (*ntp.Response, error)
• func GetNTPTime() (time.Time, error)
• func GetTimeOffset() (time.Duration, error)
• func GetUnixEpoch(timesource ...Timesource) int64
• func GetUnixEpochFrom(now time.Time) int64
• func InitLogger(encoding string, output string)
• func Logger() *zap.Logger
• func Multiaddress(node *enode.Node) (peer.ID, []multiaddr.Multiaddr, error)
• func SelectPeer(host host.Host, protocolId protocol.ID, specificPeers []peer.ID, ...) (peer.ID, error)
• func SelectPeerWithLowestRTT(ctx context.Context, host host.Host, protocolId protocol.ID, ...) (peer.ID, error)
• type Timesource
• type WakuEnrBitfield
  • func NewWakuEnrBitfield(lightpush, filter, store, relay bool) WakuEnrBitfield

Constants

const MultiaddrENRField = "multiaddrs"

MultiaddrENRField is the name of the ENR field that will contain multiaddresses that cannot be described using the already available ENR fields (i.e. in the case of websocket connections)

const WakuENRField = "waku2"

WakuENRField is the name of the ENR field that contains information about which protocols are supported by the node

Variables

var ErrNoPeersAvailable = errors.New("no suitable peers found")

ErrNoPeersAvailable is emitted when no suitable peers are found for some protocol

var NTPServer = "pool.ntp.org"

Functions

func DecodeHexString

func DecodeHexString(input string) ([]byte, error)

func EcdsaPrivKeyToSecp256k1PrivKey

func EcdsaPrivKeyToSecp256k1PrivKey(privKey *ecdsa.PrivateKey) *crypto.Secp256k1PrivateKey

EcdsaPubKeyToSecp256k1PublicKey converts an `ecdsa.PrivateKey` into a libp2p `crypto.Secp256k1PrivateKey“

func EcdsaPubKeyToSecp256k1PublicKey

func EcdsaPubKeyToSecp256k1PublicKey(pubKey *ecdsa.PublicKey) *crypto.Secp256k1PublicKey

EcdsaPubKeyToSecp256k1PublicKey converts an `ecdsa.PublicKey` into a libp2p `crypto.Secp256k1PublicKey“

func EnodeToPeerInfo

func EnodeToPeerInfo(node *enode.Node) (*peer.AddrInfo, error)

EnodeToPeerInfo extracts the peer ID and multiaddresses defined in an ENR

func GetNTPMetadata

func GetNTPMetadata() (*ntp.Response, error)

func GetNTPTime

func GetNTPTime() (time.Time, error)

func GetTimeOffset

func GetTimeOffset() (time.Duration, error)

func GetUnixEpoch

func GetUnixEpoch(timesource ...Timesource) int64

GetUnixEpoch returns the current time in unix timestamp with the integer part representing seconds and the decimal part representing subseconds. Optionally receives a timesource to obtain the time from

func GetUnixEpochFrom

func GetUnixEpochFrom(now time.Time) int64

GetUnixEpochFrom converts a time into a unix timestamp with nanoseconds

func InitLogger

func InitLogger(encoding string, output string)

InitLogger initializes a global logger using an specific encoding

func Logger

func Logger() *zap.Logger

Logger creates a zap.Logger with some reasonable defaults

func Multiaddress

func Multiaddress(node *enode.Node) (peer.ID, []multiaddr.Multiaddr, error)

Multiaddress is used to extract all the multiaddresses that are part of a ENR record

func SelectPeer

func SelectPeer(host host.Host, protocolId protocol.ID, specificPeers []peer.ID, log *zap.Logger) (peer.ID, error)

SelectPeer is used to return a random peer that supports a given protocol. If a list of specific peers is passed, the peer will be chosen from that list assuming it supports the chosen protocol, otherwise it will chose a peer from the node peerstore

func SelectPeerWithLowestRTT

func SelectPeerWithLowestRTT(ctx context.Context, host host.Host, protocolId protocol.ID, specificPeers []peer.ID, log *zap.Logger) (peer.ID, error)

SelectPeerWithLowestRTT will select a peer that supports a specific protocol with the lowest reply time If a list of specific peers is passed, the peer will be chosen from that list assuming it supports the chosen protocol, otherwise it will chose a peer from the node peerstore

Types

type Timesource

type Timesource interface {
	Now() time.Time
}

type WakuEnrBitfield

type WakuEnrBitfield = uint8

WakuEnrBitfield is a8-bit flag field to indicate Waku capabilities. Only the 4 LSBs are currently defined according to RFC31 (https://rfc.vac.dev/spec/31/).

func NewWakuEnrBitfield

func NewWakuEnrBitfield(lightpush, filter, store, relay bool) WakuEnrBitfield

NewWakuEnrBitfield creates a WakuEnrBitField whose value will depend on which protocols are enabled in the node