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lnwallet/channel: let evaluateHTLCView take mutate boolean

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This commit adds a new boolean parameter mutateState to
evalueteHTLCView, that let us call it without neccessarily
mutating the addHeight/removeHeight of the HTLCs, which is
useful when evaluating the commitment validity without
mutating the state.
This commit is contained in:
Johan T. Halseth 2018-02-06 14:02:01 -05:00
parent 78514acd49
commit 98d28611e4
No known key found for this signature in database
GPG Key ID: 15BAADA29DA20D26
1 changed files with 23 additions and 11 deletions
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34
lnwallet/channel.go
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@ -2253,8 +2253,16 @@ func (lc *LightningChannel) createCommitmentTx(c *commitment,
// settles, and timeouts found in both logs. The resulting view returned
// reflects the current state of HTLCs within the remote or local commitment
// chain.
//
// If mutateState is set to true, then the add height of all added HTLCs
// will be set to nextHeight, and the remove height of all removed HTLCs
// will be set to nextHeight. This should therefore only be set to true
// once for each height, and only in concert with signing a new commitment.
// TODO(halseth): return htlcs to mutate instead of mutating inside
// method.
func (lc *LightningChannel) evaluateHTLCView(view *htlcView, ourBalance,
theirBalance *lnwire.MilliSatoshi, nextHeight uint64, remoteChain bool) *htlcView {
theirBalance *lnwire.MilliSatoshi, nextHeight uint64,
remoteChain, mutateState bool) *htlcView {
newView := &htlcView{}
@ -2276,7 +2284,7 @@ func (lc *LightningChannel) evaluateHTLCView(view *htlcView, ourBalance,
// If we're settling an inbound HTLC, and it hasn't been
// processed yet, then increment our state tracking the total
// number of satoshis we've received within the channel.
if entry.EntryType == Settle && !remoteChain &&
if mutateState && entry.EntryType == Settle && !remoteChain &&
entry.removeCommitHeightLocal == 0 {
lc.channelState.TotalMSatReceived += entry.Amount
}
@ -2285,7 +2293,7 @@ func (lc *LightningChannel) evaluateHTLCView(view *htlcView, ourBalance,
skipThem[addEntry.HtlcIndex] = struct{}{}
processRemoveEntry(entry, ourBalance, theirBalance,
nextHeight, remoteChain, true)
nextHeight, remoteChain, true, mutateState)
}
for _, entry := range view.theirUpdates {
if entry.EntryType == Add {
@ -2296,7 +2304,7 @@ func (lc *LightningChannel) evaluateHTLCView(view *htlcView, ourBalance,
// and it hasn't been processed, yet, the increment our state
// tracking the total number of satoshis we've sent within the
// channel.
if entry.EntryType == Settle && !remoteChain &&
if mutateState && entry.EntryType == Settle && !remoteChain &&
entry.removeCommitHeightLocal == 0 {
lc.channelState.TotalMSatSent += entry.Amount
}
@ -2305,7 +2313,7 @@ func (lc *LightningChannel) evaluateHTLCView(view *htlcView, ourBalance,
skipUs[addEntry.HtlcIndex] = struct{}{}
processRemoveEntry(entry, ourBalance, theirBalance,
nextHeight, remoteChain, false)
nextHeight, remoteChain, false, mutateState)
}
// Next we take a second pass through all the log entries, skipping any
@ -2318,7 +2326,7 @@ func (lc *LightningChannel) evaluateHTLCView(view *htlcView, ourBalance,
}
processAddEntry(entry, ourBalance, theirBalance, nextHeight,
remoteChain, false)
remoteChain, false, mutateState)
newView.ourUpdates = append(newView.ourUpdates, entry)
}
for _, entry := range view.theirUpdates {
@ -2328,7 +2336,7 @@ func (lc *LightningChannel) evaluateHTLCView(view *htlcView, ourBalance,
}
processAddEntry(entry, ourBalance, theirBalance, nextHeight,
remoteChain, true)
remoteChain, true, mutateState)
newView.theirUpdates = append(newView.theirUpdates, entry)
}
@ -2340,7 +2348,7 @@ func (lc *LightningChannel) evaluateHTLCView(view *htlcView, ourBalance,
// was committed is updated. Keeping track of this inclusion height allows us to
// later compact the log once the change is fully committed in both chains.
func processAddEntry(htlc *PaymentDescriptor, ourBalance, theirBalance *lnwire.MilliSatoshi,
nextHeight uint64, remoteChain bool, isIncoming bool) {
nextHeight uint64, remoteChain bool, isIncoming, mutateState bool) {
// If we're evaluating this entry for the remote chain (to create/view
// a new commitment), then we'll may be updating the height this entry
@ -2368,7 +2376,9 @@ func processAddEntry(htlc *PaymentDescriptor, ourBalance, theirBalance *lnwire.M
*ourBalance -= htlc.Amount
}
*addHeight = nextHeight
if mutateState {
*addHeight = nextHeight
}
}
// processRemoveEntry processes a log entry which settles or times out a
@ -2376,7 +2386,7 @@ func processAddEntry(htlc *PaymentDescriptor, ourBalance, theirBalance *lnwire.M
// is skipped.
func processRemoveEntry(htlc *PaymentDescriptor, ourBalance,
theirBalance *lnwire.MilliSatoshi, nextHeight uint64,
remoteChain bool, isIncoming bool) {
remoteChain bool, isIncoming, mutateState bool) {
var removeHeight *uint64
if remoteChain {
@ -2416,7 +2426,9 @@ func processRemoveEntry(htlc *PaymentDescriptor, ourBalance,
*ourBalance += htlc.Amount
}
*removeHeight = nextHeight
if mutateState {
*removeHeight = nextHeight
}
}
// generateRemoteHtlcSigJobs generates a series of HTLC signature jobs for the