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lnwallet: add MaxFeeRate method to LightningChannel

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This commit is contained in:
Wilmer Paulino 2019-08-23 16:04:30 -07:00
parent 81cb3cb739
commit 59d19e0ca9
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GPG Key ID: 6DF57B9F9514972F
1 changed files with 20 additions and 0 deletions
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20
lnwallet/channel.go
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@ -6280,6 +6280,26 @@ func (lc *LightningChannel) CalcFee(feeRate SatPerKWeight) btcutil.Amount {
return feeRate.FeeForWeight(input.CommitWeight)
}
// MaxFeeRate returns the maximum fee rate given an allocation of the channel
// initiator's spendable balance. This can be useful to determine when we should
// stop proposing fee updates that exceed our maximum allocation.
//
// NOTE: This should only be used for channels in which the local commitment is
// the initiator.
func (lc *LightningChannel) MaxFeeRate(maxAllocation float64) SatPerKWeight {
lc.RLock()
defer lc.RUnlock()
// The maximum fee depends of the available balance that can be
// committed towards fees.
balance, weight := lc.availableBalance()
feeBalance := float64(
balance.ToSatoshis() + lc.channelState.LocalCommitment.CommitFee,
)
maxFee := feeBalance * maxAllocation
return SatPerKWeight(maxFee / (float64(weight) / 1000))
}
// RemoteNextRevocation returns the channelState's RemoteNextRevocation.
func (lc *LightningChannel) RemoteNextRevocation() *btcec.PublicKey {
lc.RLock()