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netann/channel_update: set timestamp via modifier

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This commit is contained in:
Conner Fromknecht
2020-03-17 16:25:22 -07:00
parent f6c194c3cd
commit 5147a6d63d
3 changed files with 21 additions and 15 deletions
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30
netann/channel_update.go
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@@ -15,9 +15,9 @@ import (
// lnwire.ChannelUpdate.
type ChannelUpdateModifier func(*lnwire.ChannelUpdate)
// ChannelUpdateSetDisable sets the disabled channel flag if disabled is true,
// and clears the bit otherwise.
func ChannelUpdateSetDisable(disabled bool) ChannelUpdateModifier {
// ChanUpdSetDisable is a functional option that sets the disabled channel flag
// if disabled is true, and clears the bit otherwise.
func ChanUpdSetDisable(disabled bool) ChannelUpdateModifier {
return func(update *lnwire.ChannelUpdate) {
if disabled {
// Set the bit responsible for marking a channel as
@@ -31,6 +31,20 @@ func ChannelUpdateSetDisable(disabled bool) ChannelUpdateModifier {
}
}
// ChanUpdSetTimestamp is a functional option that sets the timestamp of the
// update to the current time, or increments it if the timestamp is already in
// the future.
func ChanUpdSetTimestamp(update *lnwire.ChannelUpdate) {
newTimestamp := uint32(time.Now().Unix())
if newTimestamp <= update.Timestamp {
// Increment the prior value to ensure the timestamp
// monotonically increases, otherwise the update won't
// propagate.
newTimestamp = update.Timestamp + 1
}
update.Timestamp = newTimestamp
}
// SignChannelUpdate applies the given modifiers to the passed
// lnwire.ChannelUpdate, then signs the resulting update. The provided update
// should be the most recent, valid update, otherwise the timestamp may not
@@ -45,16 +59,6 @@ func SignChannelUpdate(signer lnwallet.MessageSigner, pubKey *btcec.PublicKey,
modifier(update)
}
// Update the message's timestamp to the current time. If the update's
// current time is already in the future, we increment the prior value
// to ensure the timestamps monotonically increase, otherwise the
// update won't propagate.
newTimestamp := uint32(time.Now().Unix())
if newTimestamp <= update.Timestamp {
newTimestamp = update.Timestamp + 1
}
update.Timestamp = newTimestamp
// Create the DER-encoded ECDSA signature over the message digest.
sig, err := SignAnnouncement(signer, pubKey, update)
if err != nil {