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netann: let SignChannelUpdate take ChannelUpdate interface

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This commit is contained in:
Elle Mouton 2023-11-07 09:41:41 +02:00
parent c4ad342405
commit a5afcd21b7
No known key found for this signature in database
GPG Key ID: D7D916376026F177
1 changed files with 39 additions and 10 deletions
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49
netann/channel_update.go
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@ -67,7 +67,7 @@ func ChanUpdSetTimestamp(bestBlockHeight uint32) ChannelUpdateModifier {
//
// NOTE: This method modifies the given update.
func SignChannelUpdate(signer keychain.MessageSignerRing,
keyLoc keychain.KeyLocator, update *lnwire.ChannelUpdate1,
keyLoc keychain.KeyLocator, update lnwire.ChannelUpdate,
mods ...ChannelUpdateModifier) error {
// Apply the requested changes to the channel update.
@ -75,16 +75,45 @@ func SignChannelUpdate(signer keychain.MessageSignerRing,
modifier(update)
}
// Create the DER-encoded ECDSA signature over the message digest.
sig, err := SignAnnouncement(signer, keyLoc, update)
if err != nil {
return err
}
switch upd := update.(type) {
case *lnwire.ChannelUpdate1:
data, err := upd.DataToSign()
if err != nil {
return err
}
// Parse the DER-encoded signature into a fixed-size 64-byte array.
update.Signature, err = lnwire.NewSigFromSignature(sig)
if err != nil {
return err
sig, err := signer.SignMessage(keyLoc, data, true)
if err != nil {
return err
}
// Parse the DER-encoded signature into a fixed-size 64-byte
// array.
upd.Signature, err = lnwire.NewSigFromSignature(sig)
if err != nil {
return err
}
case *lnwire.ChannelUpdate2:
data, err := upd.DataToSign()
if err != nil {
return err
}
sig, err := signer.SignMessageSchnorr(
keyLoc, data, false, nil, upd.DigestTag(),
)
if err != nil {
return err
}
upd.Signature, err = lnwire.NewSigFromSignature(sig)
if err != nil {
return err
}
default:
return fmt.Errorf("unhandled implementation of "+
"ChannelUpdate: %T", update)
}
return nil