49 lines
1.0 KiB
Go
49 lines
1.0 KiB
Go
package badger
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import (
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"context"
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"encoding/hex"
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"github.com/dgraph-io/badger/v4"
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"github.com/fiatjaf/eventstore"
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"github.com/nbd-wtf/go-nostr"
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nostr_binary "github.com/nbd-wtf/go-nostr/binary"
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)
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func (b *BadgerBackend) SaveEvent(ctx context.Context, evt *nostr.Event) error {
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return b.Update(func(txn *badger.Txn) error {
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// query event by id to ensure we don't save duplicates
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id, _ := hex.DecodeString(evt.ID)
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prefix := make([]byte, 1+32)
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prefix[0] = indexIdPrefix
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copy(prefix[1:], id)
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it := txn.NewIterator(badger.IteratorOptions{})
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defer it.Close()
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it.Seek(prefix)
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if it.ValidForPrefix(prefix) {
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// event exists
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return eventstore.ErrDupEvent
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}
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// encode to binary
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bin, err := nostr_binary.Marshal(evt)
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if err != nil {
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return err
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}
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idx := b.Serial()
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// raw event store
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if err := txn.Set(idx, bin); err != nil {
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return err
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}
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for _, k := range getIndexKeysForEvent(evt, idx[1:]) {
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if err := txn.Set(k, nil); err != nil {
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return err
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}
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}
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return nil
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})
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}
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