82 lines
2.1 KiB
Go
82 lines
2.1 KiB
Go
package database
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import (
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"errors"
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"fmt"
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"github.com/dgraph-io/badger/v4"
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"lol.mleku.dev/chk"
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"lol.mleku.dev/log"
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"git.mleku.dev/mleku/nostr/crypto/keys"
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"git.mleku.dev/mleku/nostr/encoders/hex"
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)
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const relayIdentitySecretKey = "relay:identity:sk"
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// GetRelayIdentitySecret returns the relay identity secret key bytes if present.
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// If the key is not found, returns (nil, badger.ErrKeyNotFound).
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func (d *D) GetRelayIdentitySecret() (skb []byte, err error) {
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err = d.DB.View(func(txn *badger.Txn) error {
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item, err := txn.Get([]byte(relayIdentitySecretKey))
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if errors.Is(err, badger.ErrKeyNotFound) {
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return err
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}
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if err != nil {
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return err
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}
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return item.Value(func(val []byte) error {
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// value stored as hex string
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b, err := hex.Dec(string(val))
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if err != nil {
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return err
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}
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skb = make([]byte, len(b))
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copy(skb, b)
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return nil
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})
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})
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return
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}
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// SetRelayIdentitySecret stores the relay identity secret key bytes (expects 32 bytes).
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func (d *D) SetRelayIdentitySecret(skb []byte) (err error) {
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if len(skb) != 32 {
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return fmt.Errorf("invalid secret key length: %d", len(skb))
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}
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val := []byte(hex.Enc(skb))
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return d.DB.Update(func(txn *badger.Txn) error {
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return txn.Set([]byte(relayIdentitySecretKey), val)
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})
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}
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// GetOrCreateRelayIdentitySecret retrieves the existing relay identity secret
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// key or creates and stores a new one if none exists.
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func (d *D) GetOrCreateRelayIdentitySecret() (skb []byte, err error) {
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// Try get fast path
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if skb, err = d.GetRelayIdentitySecret(); err == nil && len(skb) == 32 {
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return skb, nil
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}
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if err != nil && !errors.Is(err, badger.ErrKeyNotFound) {
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return nil, err
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}
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// Create new key and store atomically
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var gen []byte
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if gen, err = keys.GenerateSecretKey(); chk.E(err) {
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return nil, err
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}
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if err = d.SetRelayIdentitySecret(gen); chk.E(err) {
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return nil, err
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}
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log.I.F("generated new relay identity key (pub=%s)", mustPub(gen))
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return gen, nil
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}
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func mustPub(skb []byte) string {
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pk, err := keys.SecretBytesToPubKeyHex(skb)
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if err != nil {
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return ""
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}
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return pk
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}
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