nostr

package module
v0.28.0 Latest Latest
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 Go to latest Published: Jan 10, 2024 License: MIT Imports: 35 Imported by: 381

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go-nostr

A set of useful things for Nostr Protocol implementations.

go get github.com/nbd-wtf/go-nostr
Generating a key
package main

import (
    "fmt"

    "github.com/nbd-wtf/go-nostr"
    "github.com/nbd-wtf/go-nostr/nip19"
)

func main() {
    sk := nostr.GeneratePrivateKey()
    pk, _ := nostr.GetPublicKey(sk)
    nsec, _ := nip19.EncodePrivateKey(sk)
    npub, _ := nip19.EncodePublicKey(pk)

    fmt.Println("sk:", sk)
    fmt.Println("pk:", pk)
    fmt.Println(nsec)
    fmt.Println(npub)
}
Subscribing to a single relay
ctx := context.Background()
relay, err := nostr.RelayConnect(ctx, "wss://nostr.zebedee.cloud")
if err != nil {
	panic(err)
}

npub := "npub1422a7ws4yul24p0pf7cacn7cghqkutdnm35z075vy68ggqpqjcyswn8ekc"

var filters nostr.Filters
if _, v, err := nip19.Decode(npub); err == nil {
	pub := v.(string)
	filters = []nostr.Filter{{
		Kinds:   []int{nostr.KindTextNote},
		Authors: []string{pub},
		Limit:   1,
	}}
} else {
	panic(err)
}

ctx, cancel := context.WithTimeout(ctx, 3*time.Second)
defer cancel()

sub, err := relay.Subscribe(ctx, filters)
if err != nil {
	panic(err)
}

for ev := range sub.Events {
	// handle returned event.
	// channel will stay open until the ctx is cancelled (in this case, context timeout)
	fmt.Println(ev.ID)
}
Publishing to two relays
sk := nostr.GeneratePrivateKey()
pub, _ := nostr.GetPublicKey(sk)

ev := nostr.Event{
	PubKey:    pub,
	CreatedAt: nostr.Now(),
	Kind:      nostr.KindTextNote,
	Tags:      nil,
	Content:   "Hello World!",
}

// calling Sign sets the event ID field and the event Sig field
ev.Sign(sk)

// publish the event to two relays
ctx := context.Background()
for _, url := range []string{"wss://nostr.zebedee.cloud", "wss://nostr-pub.wellorder.net"} {
	relay, err := nostr.RelayConnect(ctx, url)
	if err != nil {
		fmt.Println(err)
		continue
	}
	if err := relay.Publish(ctx, ev); err != nil {
		fmt.Println(err)
		continue
	}

	fmt.Printf("published to %s\n", url)
}
Example script
go run example/example.go

Warning: risk of goroutine bloat (if used incorrectly)

Remember to cancel subscriptions, either by calling .Unsub() on them or ensuring their context.Context will be canceled at some point. If you don't do that they will keep creating a new goroutine for every new event that arrives and if you have stopped listening on the sub.Events channel that will cause chaos and doom in your program.

Documentation

Index

Examples

Constants

View Source 
const (
	KindProfileMetadata             int = 0
	KindTextNote                    int = 1
	KindRecommendServer             int = 2
	KindContactList                 int = 3
	KindEncryptedDirectMessage      int = 4
	KindDeletion                    int = 5
	KindRepost                      int = 6
	KindReaction                    int = 7
	KindSimpleGroupChatMessage      int = 9
	KindSimpleGroupThread           int = 11
	KindSimpleGroupReply            int = 12
	KindChannelCreation             int = 40
	KindChannelMetadata             int = 41
	KindChannelMessage              int = 42
	KindChannelHideMessage          int = 43
	KindChannelMuteUser             int = 44
	KindFileMetadata                int = 1063
	KindSimpleGroupAddUser          int = 9000
	KindSimpleGroupRemoveUser       int = 9001
	KindSimpleGroupEditMetadata     int = 9002
	KindSimpleGroupAddPermission    int = 9003
	KindSimpleGroupRemovePermission int = 9004
	KindSimpleGroupDeleteEvent      int = 9005
	KindSimpleGroupEditGroupStatus  int = 9006
	KindZapRequest                  int = 9734
	KindZap                         int = 9735
	KindMuteList                    int = 10000
	KindPinList                     int = 10001
	KindRelayListMetadata           int = 10002
	KindNWCWalletInfo               int = 13194
	KindClientAuthentication        int = 22242
	KindNWCWalletRequest            int = 23194
	KindNWCWalletResponse           int = 23195
	KindNostrConnect                int = 24133
	KindCategorizedPeopleList       int = 30000
	KindCategorizedBookmarksList    int = 30001
	KindProfileBadges               int = 30008
	KindBadgeDefinition             int = 30009
	KindStallDefinition             int = 30017
	KindProductDefinition           int = 30018
	KindArticle                     int = 30023
	KindApplicationSpecificData     int = 30078
	KindSimpleGroupMetadata         int = 39000
	KindSimpleGroupAdmins           int = 39001
	KindSimpleGroupMembers          int = 39002
)
View Source 
const MAX_LOCKS = 50

Variables

View Source 
var (
	// call SetOutput on InfoLogger to enable info logging
	InfoLogger = log.New(os.Stderr, "[go-nostr][info] ", log.LstdFlags)

	// call SetOutput on DebugLogger to enable debug logging
	DebugLogger = log.New(os.Stderr, "[go-nostr][debug] ", log.LstdFlags)
)

Functions

func FilterEqual 

func FilterEqual(a Filter, b Filter) bool

func GeneratePrivateKey 

func GeneratePrivateKey() string

func GetPublicKey 

func GetPublicKey(sk string) (string, error)

func IsValidPublicKeyHex added in v0.14.0 

func IsValidPublicKeyHex(pk string) bool

func IsValidRelayURL added in v0.19.3 

func IsValidRelayURL(u string) bool

func NormalizeOKMessage added in v0.26.0 

func NormalizeOKMessage(reason string, prefix string) string

NormalizeOKMessage takes a string message that is to be sent in an `OK` or `CLOSED` command and prefixes it with "<prefix>: " if it doesn't already have an acceptable prefix.

func NormalizeURL 

func NormalizeURL(u string) string

NormalizeURL normalizes the url and replaces http://, https:// schemes with ws://, wss:// and normalizes the path.

Example 
fmt.Println(NormalizeURL(""))
fmt.Println(NormalizeURL("wss://x.com/y"))
fmt.Println(NormalizeURL("wss://x.com/y/"))
fmt.Println(NormalizeURL("http://x.com/y"))
fmt.Println(NormalizeURL(NormalizeURL("http://x.com/y")))
fmt.Println(NormalizeURL("wss://x.com"))
fmt.Println(NormalizeURL("wss://x.com/"))
fmt.Println(NormalizeURL(NormalizeURL(NormalizeURL("wss://x.com/"))))
fmt.Println(NormalizeURL("x.com"))
fmt.Println(NormalizeURL("x.com/"))
fmt.Println(NormalizeURL("x.com////"))
fmt.Println(NormalizeURL("x.com/?x=23"))

Output:


wss://x.com/y
wss://x.com/y
ws://x.com/y
ws://x.com/y
wss://x.com
wss://x.com
wss://x.com
wss://x.com
wss://x.com
wss://x.com
wss://x.com?x=23

Types

type AuthEnvelope added in v0.18.1 

type AuthEnvelope struct {
	Challenge *string
	Event     Event
}

func (AuthEnvelope) Label added in v0.18.1 

func (_ AuthEnvelope) Label() string

func (AuthEnvelope) MarshalJSON added in v0.18.1 

func (v AuthEnvelope) MarshalJSON() ([]byte, error)

func (AuthEnvelope) String added in v0.27.0 

func (a AuthEnvelope) String() string

func (*AuthEnvelope) UnmarshalJSON added in v0.18.1 

func (v *AuthEnvelope) UnmarshalJSON(data []byte) error

type CloseEnvelope added in v0.18.1 

type CloseEnvelope string

func (CloseEnvelope) Label added in v0.18.1 

func (_ CloseEnvelope) Label() string

func (CloseEnvelope) MarshalJSON added in v0.18.1 

func (v CloseEnvelope) MarshalJSON() ([]byte, error)

func (CloseEnvelope) String added in v0.27.0 

func (c CloseEnvelope) String() string

func (*CloseEnvelope) UnmarshalJSON added in v0.18.1 

func (v *CloseEnvelope) UnmarshalJSON(data []byte) error

type ClosedEnvelope added in v0.26.0 

type ClosedEnvelope struct {
	SubscriptionID string
	Reason         string
}

func (ClosedEnvelope) Label added in v0.26.0 

func (_ ClosedEnvelope) Label() string

func (ClosedEnvelope) MarshalJSON added in v0.26.0 

func (v ClosedEnvelope) MarshalJSON() ([]byte, error)

func (ClosedEnvelope) String added in v0.27.0 

func (c ClosedEnvelope) String() string

func (*ClosedEnvelope) UnmarshalJSON added in v0.26.0 

func (v *ClosedEnvelope) UnmarshalJSON(data []byte) error

type Connection 

type Connection struct {
	// contains filtered or unexported fields
}

func NewConnection 

func NewConnection(ctx context.Context, url string, requestHeader http.Header) (*Connection, error)

func (*Connection) Close 

func (c *Connection) Close() error

func (*Connection) ReadMessage added in v0.18.0 

func (c *Connection) ReadMessage(ctx context.Context, buf io.Writer) error

func (*Connection) WriteMessage 

func (c *Connection) WriteMessage(data []byte) error

type CountEnvelope added in v0.19.4 

type CountEnvelope struct {
	SubscriptionID string
	Filters
	Count *int64
}

func (CountEnvelope) Label added in v0.19.4 

func (_ CountEnvelope) Label() string

func (CountEnvelope) MarshalJSON added in v0.19.4 

func (v CountEnvelope) MarshalJSON() ([]byte, error)

func (CountEnvelope) String added in v0.27.0 

func (c CountEnvelope) String() string

func (*CountEnvelope) UnmarshalJSON added in v0.19.4 

func (v *CountEnvelope) UnmarshalJSON(data []byte) error

type EOSEEnvelope added in v0.18.1 

type EOSEEnvelope string

func (EOSEEnvelope) Label added in v0.18.1 

func (_ EOSEEnvelope) Label() string

func (EOSEEnvelope) MarshalJSON added in v0.18.1 

func (v EOSEEnvelope) MarshalJSON() ([]byte, error)

func (EOSEEnvelope) String added in v0.27.0 

func (e EOSEEnvelope) String() string

func (*EOSEEnvelope) UnmarshalJSON added in v0.18.1 

func (v *EOSEEnvelope) UnmarshalJSON(data []byte) error

type EntityPointer added in v0.14.0 

type EntityPointer struct {
	PublicKey  string   `json:"pubkey"`
	Kind       int      `json:"kind,omitempty"`
	Identifier string   `json:"identifier,omitempty"`
	Relays     []string `json:"relays,omitempty"`
}

type Envelope added in v0.18.1 

type Envelope interface {
	Label() string
	UnmarshalJSON([]byte) error
	MarshalJSON() ([]byte, error)
	String() string
}

func ParseMessage added in v0.18.1 

func ParseMessage(message []byte) Envelope

type Event 

type Event struct {
	ID        string    `json:"id"`
	PubKey    string    `json:"pubkey"`
	CreatedAt Timestamp `json:"created_at"`
	Kind      int       `json:"kind"`
	Tags      Tags      `json:"tags"`
	Content   string    `json:"content"`
	Sig       string    `json:"sig"`
	// contains filtered or unexported fields
}

func (Event) CheckSignature 

func (evt Event) CheckSignature() (bool, error)

CheckSignature checks if the signature is valid for the id (which is a hash of the serialized event content). returns an error if the signature itself is invalid.

func (Event) GetExtra added in v0.8.2 

func (evt Event) GetExtra(key string) any

GetExtra tries to get a value under the given key that may be present in the event object but is hidden in the basic type since it is out of the spec.

func (Event) GetExtraBoolean added in v0.8.2 

func (evt Event) GetExtraBoolean(key string) bool

GetExtraBoolean is like Event.GetExtra, but only works if the value is a boolean, otherwise returns the zero-value.

func (Event) GetExtraNumber added in v0.8.2 

func (evt Event) GetExtraNumber(key string) float64

GetExtraNumber is like Event.GetExtra, but only works if the value is a float64, otherwise returns the zero-value.

func (Event) GetExtraString added in v0.8.2 

func (evt Event) GetExtraString(key string) string

GetExtraString is like Event.GetExtra, but only works if the value is a string, otherwise returns the zero-value.

func (*Event) GetID 

func (evt *Event) GetID() string

GetID serializes and returns the event ID as a string.

func (Event) MarshalEasyJSON added in v0.17.0 

func (v Event) MarshalEasyJSON(w *jwriter.Writer)

MarshalEasyJSON supports easyjson.Marshaler interface

func (Event) MarshalJSON 

func (v Event) MarshalJSON() ([]byte, error)

MarshalJSON supports json.Marshaler interface

func (*Event) RemoveExtra added in v0.24.0 

func (evt *Event) RemoveExtra(key string)

RemoveExtra removes an out-of-the-spec value under the given key from the event object.

func (*Event) Serialize 

func (evt *Event) Serialize() []byte

Serialize outputs a byte array that can be hashed/signed to identify/authenticate. JSON encoding as defined in RFC4627.

func (*Event) SetExtra added in v0.8.2 

func (evt *Event) SetExtra(key string, value any)

SetExtra sets an out-of-the-spec value under the given key into the event object.

func (*Event) Sign 

func (evt *Event) Sign(privateKey string, signOpts ...schnorr.SignOption) error

Sign signs an event with a given privateKey.

func (Event) String added in v0.16.3 

func (evt Event) String() string

Event Stringer interface, just returns the raw JSON as a string.

func (*Event) UnmarshalEasyJSON added in v0.17.0 

func (v *Event) UnmarshalEasyJSON(l *jlexer.Lexer)

UnmarshalEasyJSON supports easyjson.Unmarshaler interface

func (*Event) UnmarshalJSON 

func (v *Event) UnmarshalJSON(data []byte) error

UnmarshalJSON supports json.Unmarshaler interface

type EventEnvelope added in v0.18.1 

type EventEnvelope struct {
	SubscriptionID *string
	Event
}

func (EventEnvelope) Label added in v0.18.1 

func (_ EventEnvelope) Label() string

func (EventEnvelope) MarshalJSON added in v0.18.1 

func (v EventEnvelope) MarshalJSON() ([]byte, error)

func (*EventEnvelope) UnmarshalJSON added in v0.18.1 

func (v *EventEnvelope) UnmarshalJSON(data []byte) error

type EventMessage 

type EventMessage struct {
	Event Event
	Relay string
}

type EventPointer added in v0.13.0 

type EventPointer struct {
	ID     string   `json:"id"`
	Relays []string `json:"relays,omitempty"`
	Author string   `json:"author,omitempty"`
	Kind   int      `json:"kind,omitempty"`
}

type Filter 

type Filter struct {
	IDs     []string   `json:"ids,omitempty"`
	Kinds   []int      `json:"kinds,omitempty"`
	Authors []string   `json:"authors,omitempty"`
	Tags    TagMap     `json:"-,omitempty"`
	Since   *Timestamp `json:"since,omitempty"`
	Until   *Timestamp `json:"until,omitempty"`
	Limit   int        `json:"limit,omitempty"`
	Search  string     `json:"search,omitempty"`
}

func (Filter) Clone added in v0.25.3 

func (ef Filter) Clone() Filter

func (Filter) MarshalEasyJSON added in v0.17.0 

func (v Filter) MarshalEasyJSON(w *jwriter.Writer)

MarshalEasyJSON supports easyjson.Marshaler interface

func (Filter) MarshalJSON 

func (v Filter) MarshalJSON() ([]byte, error)

MarshalJSON supports json.Marshaler interface

func (Filter) Matches 

func (ef Filter) Matches(event *Event) bool

func (Filter) String added in v0.8.2 

func (ef Filter) String() string

func (*Filter) UnmarshalEasyJSON added in v0.17.0 

func (v *Filter) UnmarshalEasyJSON(l *jlexer.Lexer)

UnmarshalEasyJSON supports easyjson.Unmarshaler interface

func (*Filter) UnmarshalJSON 

func (v *Filter) UnmarshalJSON(data []byte) error

UnmarshalJSON supports json.Unmarshaler interface

type Filters 

type Filters []Filter

func (Filters) Match 

func (eff Filters) Match(event *Event) bool

func (Filters) String added in v0.8.2 

func (eff Filters) String() string

type IncomingEvent added in v0.23.0 

type IncomingEvent struct {
	*Event
	Relay *Relay
}

type NoticeEnvelope added in v0.18.1 

type NoticeEnvelope string

func (NoticeEnvelope) Label added in v0.18.1 

func (_ NoticeEnvelope) Label() string

func (NoticeEnvelope) MarshalJSON added in v0.18.1 

func (v NoticeEnvelope) MarshalJSON() ([]byte, error)

func (NoticeEnvelope) String added in v0.27.0 

func (n NoticeEnvelope) String() string

func (*NoticeEnvelope) UnmarshalJSON added in v0.18.1 

func (v *NoticeEnvelope) UnmarshalJSON(data []byte) error

type OKEnvelope added in v0.18.1 

type OKEnvelope struct {
	EventID string
	OK      bool
	Reason  string
}

func (OKEnvelope) Label added in v0.18.1 

func (_ OKEnvelope) Label() string

func (OKEnvelope) MarshalJSON added in v0.18.1 

func (v OKEnvelope) MarshalJSON() ([]byte, error)

func (OKEnvelope) String added in v0.27.0 

func (o OKEnvelope) String() string

func (*OKEnvelope) UnmarshalJSON added in v0.18.1 

func (v *OKEnvelope) UnmarshalJSON(data []byte) error

type PoolOption added in v0.27.0 

type PoolOption interface {
	IsPoolOption()
	Apply(*SimplePool)
}

type ProfilePointer added in v0.13.0 

type ProfilePointer struct {
	PublicKey string   `json:"pubkey"`
	Relays    []string `json:"relays,omitempty"`
}

type Relay 

type Relay struct {
	URL           string
	RequestHeader http.Header // e.g. for origin header

	Connection    *Connection
	Subscriptions *xsync.MapOf[string, *Subscription]

	ConnectionError error

	// custom things that aren't often used
	//
	AssumeValid bool // this will skip verifying signatures for events received from this relay
	// contains filtered or unexported fields
}

func NewRelay 

func NewRelay(ctx context.Context, url string, opts ...RelayOption) *Relay

NewRelay returns a new relay. The relay connection will be closed when the context is canceled.

func RelayConnect added in v0.8.1 

func RelayConnect(ctx context.Context, url string, opts ...RelayOption) (*Relay, error)

RelayConnect returns a relay object connected to url. Once successfully connected, cancelling ctx has no effect. To close the connection, call r.Close().

func (*Relay) Auth added in v0.12.0 

func (r *Relay) Auth(ctx context.Context, sign func(event *Event) error) error

Auth sends an "AUTH" command client->relay as in NIP-42 and waits for an OK response.

func (*Relay) Close 

func (r *Relay) Close() error

func (*Relay) Connect 

func (r *Relay) Connect(ctx context.Context) error

Connect tries to establish a websocket connection to r.URL. If the context expires before the connection is complete, an error is returned. Once successfully connected, context expiration has no effect: call r.Close to close the connection.

The underlying relay connection will use a background context. If you want to pass a custom context to the underlying relay connection, use NewRelay() and then Relay.Connect().

func (*Relay) Context added in v0.18.1 

func (r *Relay) Context() context.Context

Context retrieves the context that is associated with this relay connection.

func (*Relay) Count added in v0.19.5 

func (r *Relay) Count(ctx context.Context, filters Filters, opts ...SubscriptionOption) (int64, error)

func (*Relay) IsConnected added in v0.19.0 

func (r *Relay) IsConnected() bool

IsConnected returns true if the connection to this relay seems to be active.

func (*Relay) PrepareSubscription added in v0.8.2 

func (r *Relay) PrepareSubscription(ctx context.Context, filters Filters, opts ...SubscriptionOption) *Subscription

PrepareSubscription creates a subscription, but doesn't fire it.

Remember to cancel subscriptions, either by calling `.Unsub()` on them or ensuring their `context.Context` will be canceled at some point. Failure to do that will result in a huge number of halted goroutines being created.

func (*Relay) Publish 

func (r *Relay) Publish(ctx context.Context, event Event) error

Publish sends an "EVENT" command to the relay r as in NIP-01 and waits for an OK response.

func (*Relay) QuerySync added in v0.9.0 

func (r *Relay) QuerySync(ctx context.Context, filter Filter, opts ...SubscriptionOption) ([]*Event, error)

func (*Relay) String added in v0.8.2 

func (r *Relay) String() string

String just returns the relay URL.

func (*Relay) Subscribe 

func (r *Relay) Subscribe(ctx context.Context, filters Filters, opts ...SubscriptionOption) (*Subscription, error)

Subscribe sends a "REQ" command to the relay r as in NIP-01. Events are returned through the channel sub.Events. The subscription is closed when context ctx is cancelled ("CLOSE" in NIP-01).

Remember to cancel subscriptions, either by calling `.Unsub()` on them or ensuring their `context.Context` will be canceled at some point. Failure to do that will result in a huge number of halted goroutines being created.

func (*Relay) Write added in v0.19.0 

func (r *Relay) Write(msg []byte) <-chan error

Write queues a message to be sent to the relay.

type RelayOption added in v0.19.0 

type RelayOption interface {
	IsRelayOption()
}

When instantiating relay connections, some options may be passed. RelayOption is the type of the argument passed for that.

type ReqEnvelope added in v0.18.1 

type ReqEnvelope struct {
	SubscriptionID string
	Filters
}

func (ReqEnvelope) Label added in v0.18.1 

func (_ ReqEnvelope) Label() string

func (ReqEnvelope) MarshalJSON added in v0.18.1 

func (v ReqEnvelope) MarshalJSON() ([]byte, error)

func (*ReqEnvelope) UnmarshalJSON added in v0.18.1 

func (v *ReqEnvelope) UnmarshalJSON(data []byte) error

type SimplePool added in v0.18.0 

type SimplePool struct {
	Relays  *xsync.MapOf[string, *Relay]
	Context context.Context
	// contains filtered or unexported fields
}

func NewSimplePool added in v0.18.0 

func NewSimplePool(ctx context.Context, opts ...PoolOption) *SimplePool

func (*SimplePool) EnsureRelay added in v0.18.0 

func (pool *SimplePool) EnsureRelay(url string) (*Relay, error)

func (*SimplePool) QuerySingle added in v0.20.0 

func (pool *SimplePool) QuerySingle(ctx context.Context, urls []string, filter Filter) *IncomingEvent

QuerySingle returns the first event returned by the first relay, cancels everything else.

func (*SimplePool) SubMany added in v0.18.0 

func (pool *SimplePool) SubMany(ctx context.Context, urls []string, filters Filters) chan IncomingEvent

SubMany opens a subscription with the given filters to multiple relays the subscriptions only end when the context is canceled

func (*SimplePool) SubManyEose added in v0.18.0 

func (pool *SimplePool) SubManyEose(ctx context.Context, urls []string, filters Filters) chan IncomingEvent

SubManyEose is like SubMany, but it stops subscriptions and closes the channel when gets a EOSE

func (*SimplePool) SubManyEoseNonUnique added in v0.24.0 

func (pool *SimplePool) SubManyEoseNonUnique(ctx context.Context, urls []string, filters Filters) chan IncomingEvent

SubManyEoseNonUnique is like SubManyEose, but returns duplicate events if they come from different relays

func (*SimplePool) SubManyNonUnique added in v0.24.0 

func (pool *SimplePool) SubManyNonUnique(ctx context.Context, urls []string, filters Filters) chan IncomingEvent

SubManyNonUnique is like SubMany, but returns duplicate events if they come from different relays

type Status 

type Status int

type Subscription 

type Subscription struct {
	Relay   *Relay
	Filters Filters

	// the Events channel emits all EVENTs that come in a Subscription
	// will be closed when the subscription ends
	Events chan *Event

	// the EndOfStoredEvents channel gets closed when an EOSE comes for that subscription
	EndOfStoredEvents chan struct{}

	// the ClosedReason channel emits the reason when a CLOSED message is received
	ClosedReason chan string

	// Context will be .Done() when the subscription ends
	Context context.Context
	// contains filtered or unexported fields
}

func (*Subscription) Close added in v0.19.0 

func (sub *Subscription) Close()

Close just sends a CLOSE message. You probably want Unsub() instead.

func (*Subscription) Fire added in v0.8.2 

func (sub *Subscription) Fire() error

Fire sends the "REQ" command to the relay.

func (*Subscription) GetID added in v0.14.0 

func (sub *Subscription) GetID() string

GetID return the Nostr subscription ID as given to the Relay it is a concatenation of the label and a serial number.

func (*Subscription) Sub 

func (sub *Subscription) Sub(_ context.Context, filters Filters)

Sub sets sub.Filters and then calls sub.Fire(ctx). The subscription will be closed if the context expires.

func (*Subscription) Unsub 

func (sub *Subscription) Unsub()

Unsub closes the subscription, sending "CLOSE" to relay as in NIP-01. Unsub() also closes the channel sub.Events and makes a new one.

type SubscriptionOption added in v0.19.0 

type SubscriptionOption interface {
	IsSubscriptionOption()
}

When instantiating relay connections, some options may be passed. SubscriptionOption is the type of the argument passed for that. Some examples are WithLabel.

type Tag 

type Tag []string

func (Tag) Key added in v0.8.2 

func (tag Tag) Key() string

func (Tag) Relay added in v0.8.2 

func (tag Tag) Relay() string

func (Tag) StartsWith 

func (tag Tag) StartsWith(prefix []string) bool

StartsWith checks if a tag contains a prefix. for example, 

["p", "abcdef...", "wss://relay.com"]

would match against 

["p", "abcdef..."]

or even 

["p", "abcdef...", "wss://"]

func (Tag) Value added in v0.8.2 

func (tag Tag) Value() string

type TagMap 

type TagMap map[string][]string

type Tags 

type Tags []Tag

func (Tags) AppendUnique 

func (tags Tags) AppendUnique(tag Tag) Tags

AppendUnique appends a tag if it doesn't exist yet, otherwise does nothing. the uniqueness comparison is done based only on the first 2 elements of the tag.

func (Tags) ContainsAny 

func (tags Tags) ContainsAny(tagName string, values []string) bool

func (Tags) FilterOut 

func (tags Tags) FilterOut(tagPrefix []string) Tags

FilterOut removes all tags that match the prefix, see Tag.StartsWith

func (Tags) GetAll 

func (tags Tags) GetAll(tagPrefix []string) Tags

GetAll gets all the tags that match the prefix, see Tag.StartsWith

func (Tags) GetD added in v0.27.4 

func (tags Tags) GetD() string

GetD gets the first "d" tag (for parameterized replaceable events) value or ""

func (Tags) GetFirst 

func (tags Tags) GetFirst(tagPrefix []string) *Tag

GetFirst gets the first tag in tags that matches the prefix, see Tag.StartsWith

func (Tags) GetLast 

func (tags Tags) GetLast(tagPrefix []string) *Tag

GetLast gets the last tag in tags that matches the prefix, see Tag.StartsWith

func (*Tags) Scan 

func (t *Tags) Scan(src any) error

type Timestamp added in v0.17.0 

type Timestamp int64

func Now added in v0.17.0 

func Now() Timestamp

func (Timestamp) Time added in v0.17.0 

func (t Timestamp) Time() time.Time

type WithAuthHandler added in v0.19.0 

type WithAuthHandler func(authEvent *Event) error

WithAuthHandler must be a function that signs the auth event when called. it will be called whenever any relay in the pool returns a `CLOSED` message with the "auth-required:" prefix, only once for each relay

func (WithAuthHandler) Apply added in v0.27.0 

func (h WithAuthHandler) Apply(pool *SimplePool)

func (WithAuthHandler) IsPoolOption added in v0.27.0 

func (_ WithAuthHandler) IsPoolOption()

type WithLabel added in v0.19.0 

type WithLabel string

WithLabel puts a label on the subscription (it is prepended to the automatic id) that is sent to relays.

func (WithLabel) IsSubscriptionOption added in v0.19.0 

func (_ WithLabel) IsSubscriptionOption()

type WithNoticeHandler added in v0.19.0 

type WithNoticeHandler func(notice string)

WithNoticeHandler just takes notices and is expected to do something with them. when not given, defaults to logging the notices.

func (WithNoticeHandler) IsRelayOption added in v0.19.0 

func (_ WithNoticeHandler) IsRelayOption()

Source Files

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Directories

Path Synopsis
Package nip13 implements NIP-13 See https://github.com/nostr-protocol/nips/blob/master/13.md for details.
 Package nip13 implements NIP-13 See https://github.com/nostr-protocol/nips/blob/master/13.md for details.
relay

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