well-goknown/vendor/github.com/fiatjaf/khatru/adding.go

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Go
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package khatru
import (
"context"
"errors"
"fmt"
"github.com/fiatjaf/eventstore"
"github.com/nbd-wtf/go-nostr"
)
// AddEvent sends an event through then normal add pipeline, as if it was received from a websocket.
func (rl *Relay) AddEvent(ctx context.Context, evt *nostr.Event) (skipBroadcast bool, writeError error) {
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ctx, cancel := context.WithCancel(ctx)
defer cancel()
if evt == nil {
return false, errors.New("error: event is nil")
}
for _, reject := range rl.RejectEvent {
if reject, msg := reject(ctx, evt); reject {
if msg == "" {
return false, errors.New("blocked: no reason")
} else {
return false, errors.New(nostr.NormalizeOKMessage(msg, "blocked"))
}
}
}
if 20000 <= evt.Kind && evt.Kind < 30000 {
// do not store ephemeral events
for _, oee := range rl.OnEphemeralEvent {
oee(ctx, evt)
}
} else {
// will store
// but first check if we already have it
filter := nostr.Filter{IDs: []string{evt.ID}}
for _, query := range rl.QueryEvents {
ch, err := query(ctx, filter)
if err != nil {
continue
}
for range ch {
// if we run this it means we already have this event, so we just return a success and exit
return true, nil
}
}
// if it's replaceable we first delete old versions
if evt.Kind == 0 || evt.Kind == 3 || (10000 <= evt.Kind && evt.Kind < 20000) {
// replaceable event, delete before storing
filter := nostr.Filter{Authors: []string{evt.PubKey}, Kinds: []int{evt.Kind}}
for _, query := range rl.QueryEvents {
ch, err := query(ctx, filter)
if err != nil {
continue
}
for previous := range ch {
if isOlder(previous, evt) {
for _, del := range rl.DeleteEvent {
del(ctx, previous)
}
}
}
}
} else if 30000 <= evt.Kind && evt.Kind < 40000 {
// parameterized replaceable event, delete before storing
d := evt.Tags.GetFirst([]string{"d", ""})
if d == nil {
return false, fmt.Errorf("invalid: missing 'd' tag on parameterized replaceable event")
}
filter := nostr.Filter{Authors: []string{evt.PubKey}, Kinds: []int{evt.Kind}, Tags: nostr.TagMap{"d": []string{(*d)[1]}}}
for _, query := range rl.QueryEvents {
ch, err := query(ctx, filter)
if err != nil {
continue
}
for previous := range ch {
if isOlder(previous, evt) {
for _, del := range rl.DeleteEvent {
del(ctx, previous)
}
}
}
}
}
// store
for _, store := range rl.StoreEvent {
if saveErr := store(ctx, evt); saveErr != nil {
switch saveErr {
case eventstore.ErrDupEvent:
return true, nil
default:
return false, fmt.Errorf(nostr.NormalizeOKMessage(saveErr.Error(), "error"))
}
}
}
for _, ons := range rl.OnEventSaved {
ons(ctx, evt)
}
}
return false, nil
}