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rpc: expand external fee to properly tally HTLC outputs

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This commit is contained in:
Olaoluwa Osuntokun 2017-12-11 15:31:12 -08:00
parent 60791d83d5
commit 4f2a8fd533
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GPG Key ID: 964EA263DD637C21
1 changed files with 7 additions and 8 deletions
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15
rpcserver.go
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@ -1484,20 +1484,19 @@ func (r *rpcServer) ListChannels(ctx context.Context,
localBalance := localCommit.LocalBalance
remoteBalance := localCommit.RemoteBalance
commitFee := localCommit.CommitFee
// As an artefact of our usage of mSAT internally, either party
// may end up in a state where they're holding a fractional
// amount of satoshis which can't be expressed within the
// actual commitment output. Since we round down when going
// from mSAT -> SAT, we may at any point be adding an
// additional SAT to miners fees. We'll detect this, and
// display the proper commitment fee in this case.
externalCommitFee := (dbChannel.Capacity - localBalance.ToSatoshis() -
remoteBalance.ToSatoshis())
if commitFee != externalCommitFee {
commitFee = externalCommitFee
// additional SAT to miners fees. As a result, we display a
// commitment fee that accounts for this externally.
var sumOutputs btcutil.Amount
for _, txOut := range localCommit.CommitTx.TxOut {
sumOutputs += btcutil.Amount(txOut.Value)
}
externalCommitFee := dbChannel.Capacity - sumOutputs
channel := &lnrpc.ActiveChannel{
Active: peerOnline && linkActive,
@ -1507,7 +1506,7 @@ func (r *rpcServer) ListChannels(ctx context.Context,
Capacity: int64(dbChannel.Capacity),
LocalBalance: int64(localBalance.ToSatoshis()),
RemoteBalance: int64(remoteBalance.ToSatoshis()),
CommitFee: int64(commitFee),
CommitFee: int64(externalCommitFee),
CommitWeight: commitWeight,
FeePerKw: int64(localCommit.FeePerKw),
TotalSatoshisSent: int64(dbChannel.TotalMSatSent.ToSatoshis()),