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funding: query fee estimator and scale to fee-per-kw when making chan 

This commit modifies the funding workflow slightly to move the querying
to the fee estimator (for the new channel) into the fundingManager
rather than within the LightningWallet layer. When querying to
FeePerWeight, we now multiply by 1000 to arrive at fee-per-kw.

Additionally, we now also properly thread through the fee-per-kw
offered by the initiator the to the responder of the channel workflow.
This commit is contained in:
Olaoluwa Osuntokun 2017-05-16 19:10:55 -07:00
parent 38a80ba066
commit 8b432f8ca6
No known key found for this signature in database
GPG Key ID: 9CC5B105D03521A2
1 changed files with 17 additions and 4 deletions
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21
fundingmanager.go
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@ -540,7 +540,7 @@ func (f *fundingManager) handleFundingRequest(fmsg *fundingRequestMsg) {
reservation, err := f.cfg.Wallet.InitChannelReservation(amt, 0,
fmsg.peerAddress.IdentityKey, fmsg.peerAddress.Address,
uint16(fmsg.msg.ConfirmationDepth), delay, ourDustLimit,
msg.PushSatoshis)
msg.PushSatoshis, msg.FeePerKw)
if err != nil {
// TODO(roasbeef): push ErrorGeneric message
fndgLog.Errorf("Unable to initialize reservation: %v", err)
@ -1250,12 +1250,23 @@ func (f *fundingManager) handleInitFundingMsg(msg *initFundingMsg) {
msg.pushAmt, capacity, numConfs, msg.peerAddress.Address,
ourDustLimit)
// First, we'll query the fee estimator for a fee that should get the
// commitment transaction into the next block (conf target of 1). We
// target the next block here to ensure that we'll be able to execute a
// timely unilateral channel closure if needed.
// TODO(roasbeef): shouldn't be targeting next block
feePerWeight := btcutil.Amount(f.cfg.FeeEstimator.EstimateFeePerWeight(1))
// The protocol currently operates on the basis of fee-per-kw, so we'll
// multiply the computed sat/weight by 1000 to arrive at fee-per-kw.
feePerKw := feePerWeight * 1000
// Initialize a funding reservation with the local wallet. If the
// wallet doesn't have enough funds to commit to this channel, then
// the request will fail, and be aborted.
reservation, err := f.cfg.Wallet.InitChannelReservation(capacity,
localAmt, peerKey, msg.peerAddress.Address, uint16(numConfs), 4,
ourDustLimit, msg.pushAmt)
ourDustLimit, msg.pushAmt, feePerKw)
if err != nil {
msg.err <- err
return
@ -1265,6 +1276,9 @@ func (f *fundingManager) handleInitFundingMsg(msg *initFundingMsg) {
// reservation throughout its lifetime.
chanID := f.nextPendingChanID()
fndgLog.Infof("Target sat/kw for pendingID(%x): %v", chanID,
int64(feePerKw))
// If a pending channel map for this peer isn't already created, then
// we create one, ultimately allowing us to track this pending
// reservation within the target peer.
@ -1296,12 +1310,11 @@ func (f *fundingManager) handleInitFundingMsg(msg *initFundingMsg) {
msg.peerAddress.Address, chanID)
// TODO(roasbeef): add FundingRequestFromContribution func
// TODO(roasbeef): need to set fee/kb
fundingReq := lnwire.NewSingleFundingRequest(
chanID,
msg.channelType,
msg.coinType,
0, // TODO(roasbeef): grab from fee estimation model
feePerKw,
capacity,
contribution.CsvDelay,
contribution.CommitKey,