package khatru import ( "context" "errors" "fmt" "github.com/nbd-wtf/go-nostr" "github.com/nbd-wtf/go-nostr/nip77/negentropy" "github.com/nbd-wtf/go-nostr/nip77/negentropy/storage/vector" ) type NegentropySession struct { neg *negentropy.Negentropy postponeClose func() } func (rl *Relay) startNegentropySession(ctx context.Context, filter nostr.Filter) (*vector.Vector, error) { // do the same overwrite/reject flow we do in normal REQs for _, ovw := range rl.OverwriteFilter { ovw(ctx, &filter) } if filter.LimitZero { return nil, fmt.Errorf("invalid limit 0") } for _, reject := range rl.RejectFilter { if reject, msg := reject(ctx, filter); reject { return nil, errors.New(nostr.NormalizeOKMessage(msg, "blocked")) } } // fetch events and add them to a negentropy Vector store vec := vector.New() for _, query := range rl.QueryEvents { ch, err := query(ctx, filter) if err != nil { continue } else if ch == nil { continue } for event := range ch { // since the goal here is to sync databases we won't do fancy stuff like overwrite events vec.Insert(event.CreatedAt, event.ID) } } vec.Seal() return vec, nil }