lnd.xprv/netann/sign.go

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package netann
import (
"fmt"
"github.com/btcsuite/btcd/btcec"
"github.com/lightningnetwork/lnd/lnwallet"
"github.com/lightningnetwork/lnd/lnwire"
)
// SignAnnouncement signs any type of gossip message that is announced on the
// network.
func SignAnnouncement(signer lnwallet.MessageSigner, pubKey *btcec.PublicKey,
msg lnwire.Message) (*btcec.Signature, error) {
var (
data []byte
err error
)
switch m := msg.(type) {
case *lnwire.ChannelAnnouncement:
data, err = m.DataToSign()
case *lnwire.ChannelUpdate:
data, err = m.DataToSign()
case *lnwire.NodeAnnouncement:
data, err = m.DataToSign()
default:
return nil, fmt.Errorf("can't sign %T message", m)
}
if err != nil {
return nil, fmt.Errorf("unable to get data to sign: %v", err)
}
return signer.SignMessage(pubKey, data)
}