lnd.xprv/channeldb/nodes.go

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package channeldb
import (
"fmt"
"golang.org/x/crypto/ripemd160"
"github.com/boltdb/bolt"
"github.com/roasbeef/btcutil"
)
var (
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idBucket = []byte("i")
)
// PutIdKey saves the hash160 of the public key used for our identity within
// the Lightning Network.
func (d *DB) PutIdKey(pkh []byte) error {
return d.store.Update(func(tx *bolt.Tx) error {
// Get the bucket dedicated to storing the meta-data for open
// channels.
bucket, err := tx.CreateBucketIfNotExists(idBucket)
if err != nil {
return err
}
return bucket.Put(identityKey, pkh)
})
}
// GetIdKey returns the hash160 of the public key used for out identity within
// the Lightning Network as a p2pkh bitcoin address.
func (d *DB) GetIdAdr() (*btcutil.AddressPubKeyHash, error) {
pkh := make([]byte, ripemd160.Size)
err := d.store.View(func(tx *bolt.Tx) error {
// Get the bucket dedicated to storing the meta-data for open
// channels.
bucket := tx.Bucket(idBucket)
if bucket == nil {
return fmt.Errorf("id bucket not created")
}
pkBytes := bucket.Get(identityKey)
copy(pkh, pkBytes)
return nil
})
if err != nil {
return nil, err
}
log.Infof("identity key has length %d", len(pkh))
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return btcutil.NewAddressPubKeyHash(pkh, d.netParams)
}