relay_interface.go

package eventstore

import (
	"context"
	"fmt"

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

type RelayWrapper struct {
	Store
}

var _ nostr.RelayStore = (*RelayWrapper)(nil)

func (w RelayWrapper) Publish(ctx context.Context, evt nostr.Event) error {
	if nostr.IsEphemeralKind(evt.Kind) {
		// do not store ephemeral events
		return nil
	}

	ctx, cancel := context.WithCancel(ctx)
	defer cancel()

	if nostr.IsRegularKind(evt.Kind) {
		// regular events are just saved directly
		if err := w.SaveEvent(ctx, &evt); err != nil && err != ErrDupEvent {
			return fmt.Errorf("failed to save: %w", err)
		}
		return nil
	}

	// others are replaced
	w.Store.ReplaceEvent(ctx, &evt)

	return nil
}

func (w RelayWrapper) QuerySync(ctx context.Context, filter nostr.Filter) ([]*nostr.Event, error) {
	ch, err := w.Store.QueryEvents(ctx, filter)
	if err != nil {
		return nil, fmt.Errorf("failed to query: %w", err)
	}

	n := filter.Limit
	if n == 0 {
		n = 500
	}

	results := make([]*nostr.Event, 0, n)
	for evt := range ch {
		results = append(results, evt)
	}

	return results, nil
}