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Merge pull request #1693 from wpaulino/autopilot-zero-conf-inputs

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multi: allow use of unconfirmed outputs for funding transactions
This commit is contained in:
Olaoluwa Osuntokun 2018-08-17 17:06:09 -07:00 committed by GitHub
commit 4c51f9b5ae
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GPG Key ID: 4AEE18F83AFDEB23
16 changed files with 1058 additions and 635 deletions
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63
autopilot/agent.go
View File

@ -186,13 +186,18 @@ type balanceUpdate struct {
balanceDelta btcutil.Amount balanceDelta btcutil.Amount
} }
// chanOpenUpdate is a type of external state update the indicates a new // chanOpenUpdate is a type of external state update that indicates a new
// channel has been opened, either by the Agent itself (within the main // channel has been opened, either by the Agent itself (within the main
// controller loop), or by an external user to the system. // controller loop), or by an external user to the system.
type chanOpenUpdate struct { type chanOpenUpdate struct {
newChan Channel newChan Channel
} }
// chanPendingOpenUpdate is a type of external state update that indicates a new
// channel has been opened, either by the agent itself or an external subsystem,
// but is still pending.
type chanPendingOpenUpdate struct{}
// chanOpenFailureUpdate is a type of external state update that indicates // chanOpenFailureUpdate is a type of external state update that indicates
// a previous channel open failed, and that it might be possible to try again. // a previous channel open failed, and that it might be possible to try again.
type chanOpenFailureUpdate struct{} type chanOpenFailureUpdate struct{}
@ -206,9 +211,13 @@ type chanCloseUpdate struct {
// OnBalanceChange is a callback that should be executed each time the balance of // OnBalanceChange is a callback that should be executed each time the balance of
// the backing wallet changes. // the backing wallet changes.
func (a *Agent) OnBalanceChange(delta btcutil.Amount) { func (a *Agent) OnBalanceChange(delta btcutil.Amount) {
a.wg.Add(1)
go func() { go func() {
a.stateUpdates <- &balanceUpdate{ defer a.wg.Done()
balanceDelta: delta,
select {
case a.stateUpdates <- &balanceUpdate{balanceDelta: delta}:
case <-a.quit:
} }
}() }()
} }
@ -216,9 +225,25 @@ func (a *Agent) OnBalanceChange(delta btcutil.Amount) {
// OnChannelOpen is a callback that should be executed each time a new channel // OnChannelOpen is a callback that should be executed each time a new channel
// is manually opened by the user or any system outside the autopilot agent. // is manually opened by the user or any system outside the autopilot agent.
func (a *Agent) OnChannelOpen(c Channel) { func (a *Agent) OnChannelOpen(c Channel) {
a.wg.Add(1)
go func() { go func() {
a.stateUpdates <- &chanOpenUpdate{ defer a.wg.Done()
newChan: c,
select {
case a.stateUpdates <- &chanOpenUpdate{newChan: c}:
case <-a.quit:
}
}()
}
// OnChannelPendingOpen is a callback that should be executed each time a new
// channel is opened, either by the agent or an external subsystems, but is
// still pending.
func (a *Agent) OnChannelPendingOpen() {
go func() {
select {
case a.stateUpdates <- &chanPendingOpenUpdate{}:
case <-a.quit:
} }
}() }()
} }
@ -227,8 +252,14 @@ func (a *Agent) OnChannelOpen(c Channel) {
// autopilot has attempted to open a channel, but failed. In this case we can // autopilot has attempted to open a channel, but failed. In this case we can
// retry channel creation with a different node. // retry channel creation with a different node.
func (a *Agent) OnChannelOpenFailure() { func (a *Agent) OnChannelOpenFailure() {
a.wg.Add(1)
go func() { go func() {
a.stateUpdates <- &chanOpenFailureUpdate{} defer a.wg.Done()
select {
case a.stateUpdates <- &chanOpenFailureUpdate{}:
case <-a.quit:
}
}() }()
} }
@ -236,9 +267,13 @@ func (a *Agent) OnChannelOpenFailure() {
// channel has been closed for any reason. This includes regular // channel has been closed for any reason. This includes regular
// closes, force closes, and channel breaches. // closes, force closes, and channel breaches.
func (a *Agent) OnChannelClose(closedChans ...lnwire.ShortChannelID) { func (a *Agent) OnChannelClose(closedChans ...lnwire.ShortChannelID) {
a.wg.Add(1)
go func() { go func() {
a.stateUpdates <- &chanCloseUpdate{ defer a.wg.Done()
closedChans: closedChans,
select {
case a.stateUpdates <- &chanCloseUpdate{closedChans: closedChans}:
case <-a.quit:
} }
}() }()
} }
@ -364,6 +399,12 @@ func (a *Agent) controller(startingBalance btcutil.Amount) {
updateBalance() updateBalance()
// A new channel has been opened by the agent or an
// external subsystem, but is still pending
// confirmation.
case *chanPendingOpenUpdate:
updateBalance()
// A channel has been closed, this may free up an // A channel has been closed, this may free up an
// available slot, triggering a new channel update. // available slot, triggering a new channel update.
case *chanCloseUpdate: case *chanCloseUpdate:
@ -580,6 +621,12 @@ func (a *Agent) controller(startingBalance btcutil.Amount) {
err) err)
} }
} }
// Since the channel open was successful
// and is currently pending, we'll
// trigger the autopilot agent to query
// for more peers.
a.OnChannelPendingOpen()
}(chanCandidate) }(chanCandidate)
} }
pendingMtx.Unlock() pendingMtx.Unlock()

157
autopilot/agent_test.go
View File

@ -2,13 +2,12 @@ package autopilot
import ( import (
"bytes" "bytes"
"errors"
"net" "net"
"sync" "sync"
"testing" "testing"
"time" "time"
"errors"
"github.com/btcsuite/btcd/btcec" "github.com/btcsuite/btcd/btcec"
"github.com/btcsuite/btcd/wire" "github.com/btcsuite/btcd/wire"
"github.com/btcsuite/btcutil" "github.com/btcsuite/btcutil"
@ -31,21 +30,32 @@ type mockHeuristic struct {
directiveResps chan []AttachmentDirective directiveResps chan []AttachmentDirective
directiveArgs chan directiveArg directiveArgs chan directiveArg
quit chan struct{}
} }
func (m *mockHeuristic) NeedMoreChans(chans []Channel, func (m *mockHeuristic) NeedMoreChans(chans []Channel,
balance btcutil.Amount) (btcutil.Amount, uint32, bool) { balance btcutil.Amount) (btcutil.Amount, uint32, bool) {
if m.moreChanArgs != nil { if m.moreChanArgs != nil {
m.moreChanArgs <- moreChanArg{ moreChan := moreChanArg{
chans: chans, chans: chans,
balance: balance, balance: balance,
} }
select {
case m.moreChanArgs <- moreChan:
case <-m.quit:
return 0, 0, false
}
} }
resp := <-m.moreChansResps select {
case resp := <-m.moreChansResps:
return resp.amt, resp.numMore, resp.needMore return resp.amt, resp.numMore, resp.needMore
case <-m.quit:
return 0, 0, false
}
} }
type directiveArg struct { type directiveArg struct {
@ -60,16 +70,26 @@ func (m *mockHeuristic) Select(self *btcec.PublicKey, graph ChannelGraph,
skipChans map[NodeID]struct{}) ([]AttachmentDirective, error) { skipChans map[NodeID]struct{}) ([]AttachmentDirective, error) {
if m.directiveArgs != nil { if m.directiveArgs != nil {
m.directiveArgs <- directiveArg{ directive := directiveArg{
self: self, self: self,
graph: graph, graph: graph,
amt: amtToUse, amt: amtToUse,
skip: skipChans, skip: skipChans,
} }
select {
case m.directiveArgs <- directive:
case <-m.quit:
return nil, errors.New("exiting")
}
} }
resp := <-m.directiveResps select {
case resp := <-m.directiveResps:
return resp, nil return resp, nil
case <-m.quit:
return nil, errors.New("exiting")
}
} }
var _ AttachmentHeuristic = (*mockHeuristic)(nil) var _ AttachmentHeuristic = (*mockHeuristic)(nil)
@ -155,6 +175,10 @@ func TestAgentChannelOpenSignal(t *testing.T) {
t.Fatalf("unable to create agent: %v", err) t.Fatalf("unable to create agent: %v", err)
} }
// To ensure the heuristic doesn't block on quitting the agent, we'll
// use the agent's quit chan to signal when it should also stop.
heuristic.quit = agent.quit
// With the autopilot agent and all its dependencies we'll star the // With the autopilot agent and all its dependencies we'll star the
// primary controller goroutine. // primary controller goroutine.
if err := agent.Start(); err != nil { if err := agent.Start(); err != nil {
@ -296,6 +320,10 @@ func TestAgentChannelFailureSignal(t *testing.T) {
t.Fatalf("unable to create agent: %v", err) t.Fatalf("unable to create agent: %v", err)
} }
// To ensure the heuristic doesn't block on quitting the agent, we'll
// use the agent's quit chan to signal when it should also stop.
heuristic.quit = agent.quit
// With the autopilot agent and all its dependencies we'll start the // With the autopilot agent and all its dependencies we'll start the
// primary controller goroutine. // primary controller goroutine.
if err := agent.Start(); err != nil { if err := agent.Start(); err != nil {
@ -402,6 +430,10 @@ func TestAgentChannelCloseSignal(t *testing.T) {
t.Fatalf("unable to create agent: %v", err) t.Fatalf("unable to create agent: %v", err)
} }
// To ensure the heuristic doesn't block on quitting the agent, we'll
// use the agent's quit chan to signal when it should also stop.
heuristic.quit = agent.quit
// With the autopilot agent and all its dependencies we'll star the // With the autopilot agent and all its dependencies we'll star the
// primary controller goroutine. // primary controller goroutine.
if err := agent.Start(); err != nil { if err := agent.Start(); err != nil {
@ -521,6 +553,10 @@ func TestAgentBalanceUpdate(t *testing.T) {
t.Fatalf("unable to create agent: %v", err) t.Fatalf("unable to create agent: %v", err)
} }
// To ensure the heuristic doesn't block on quitting the agent, we'll
// use the agent's quit chan to signal when it should also stop.
heuristic.quit = agent.quit
// With the autopilot agent and all its dependencies we'll star the // With the autopilot agent and all its dependencies we'll star the
// primary controller goroutine. // primary controller goroutine.
if err := agent.Start(); err != nil { if err := agent.Start(); err != nil {
@ -643,6 +679,10 @@ func TestAgentImmediateAttach(t *testing.T) {
t.Fatalf("unable to create agent: %v", err) t.Fatalf("unable to create agent: %v", err)
} }
// To ensure the heuristic doesn't block on quitting the agent, we'll
// use the agent's quit chan to signal when it should also stop.
heuristic.quit = agent.quit
// With the autopilot agent and all its dependencies we'll star the // With the autopilot agent and all its dependencies we'll star the
// primary controller goroutine. // primary controller goroutine.
if err := agent.Start(); err != nil { if err := agent.Start(); err != nil {
@ -781,6 +821,10 @@ func TestAgentPrivateChannels(t *testing.T) {
t.Fatalf("unable to create agent: %v", err) t.Fatalf("unable to create agent: %v", err)
} }
// To ensure the heuristic doesn't block on quitting the agent, we'll
// use the agent's quit chan to signal when it should also stop.
heuristic.quit = agent.quit
// With the autopilot agent and all its dependencies we'll star the // With the autopilot agent and all its dependencies we'll star the
// primary controller goroutine. // primary controller goroutine.
if err := agent.Start(); err != nil { if err := agent.Start(); err != nil {
@ -914,6 +958,10 @@ func TestAgentPendingChannelState(t *testing.T) {
t.Fatalf("unable to create agent: %v", err) t.Fatalf("unable to create agent: %v", err)
} }
// To ensure the heuristic doesn't block on quitting the agent, we'll
// use the agent's quit chan to signal when it should also stop.
heuristic.quit = agent.quit
// With the autopilot agent and all its dependencies we'll start the // With the autopilot agent and all its dependencies we'll start the
// primary controller goroutine. // primary controller goroutine.
if err := agent.Start(); err != nil { if err := agent.Start(); err != nil {
@ -966,7 +1014,6 @@ func TestAgentPendingChannelState(t *testing.T) {
} }
select { select {
case heuristic.directiveResps <- []AttachmentDirective{nodeDirective}: case heuristic.directiveResps <- []AttachmentDirective{nodeDirective}:
return
case <-time.After(time.Second * 10): case <-time.After(time.Second * 10):
t.Fatalf("heuristic wasn't queried in time") t.Fatalf("heuristic wasn't queried in time")
} }
@ -994,8 +1041,6 @@ func TestAgentPendingChannelState(t *testing.T) {
// heuristic. // heuristic.
agent.OnBalanceChange(0.4 * btcutil.SatoshiPerBitcoin) agent.OnBalanceChange(0.4 * btcutil.SatoshiPerBitcoin)
wg = sync.WaitGroup{}
// The heuristic should be queried, and the argument for the set of // The heuristic should be queried, and the argument for the set of
// channels passed in should include the pending channels that // channels passed in should include the pending channels that
// should've been created above. // should've been created above.
@ -1044,3 +1089,97 @@ func TestAgentPendingChannelState(t *testing.T) {
t.Fatalf("select wasn't queried in time") t.Fatalf("select wasn't queried in time")
} }
} }
// TestAgentPendingOpenChannel ensures that the agent queries its heuristic once
// it detects a channel is pending open. This allows the agent to use its own
// change outputs that have yet to confirm for funding transactions.
func TestAgentPendingOpenChannel(t *testing.T) {
t.Parallel()
// First, we'll create all the dependencies that we'll need in order to
// create the autopilot agent.
self, err := randKey()
if err != nil {
t.Fatalf("unable to generate key: %v", err)
}
heuristic := &mockHeuristic{
moreChansResps: make(chan moreChansResp),
directiveResps: make(chan []AttachmentDirective),
}
chanController := &mockChanController{
openChanSignals: make(chan openChanIntent),
}
memGraph, _, _ := newMemChanGraph()
// The wallet will start with 6 BTC available.
const walletBalance = btcutil.SatoshiPerBitcoin * 6
// With the dependencies we created, we can now create the initial
// agent itself.
cfg := Config{
Self: self,
Heuristic: heuristic,
ChanController: chanController,
WalletBalance: func() (btcutil.Amount, error) {
return walletBalance, nil
},
Graph: memGraph,
MaxPendingOpens: 10,
}
agent, err := New(cfg, nil)
if err != nil {
t.Fatalf("unable to create agent: %v", err)
}
// To ensure the heuristic doesn't block on quitting the agent, we'll
// use the agent's quit chan to signal when it should also stop.
heuristic.quit = agent.quit
// With the autopilot agent and all its dependencies we'll start the
// primary controller goroutine.
if err := agent.Start(); err != nil {
t.Fatalf("unable to start agent: %v", err)
}
defer agent.Stop()
// We'll send an initial "no" response to advance the agent past its
// initial check.
var wg sync.WaitGroup
wg.Add(1)
go func() {
defer wg.Done()
select {
case heuristic.moreChansResps <- moreChansResp{false, 0, 0}:
case <-time.After(time.Second * 10):
t.Fatalf("heuristic wasn't queried in time")
}
}()
// Next, we'll signal that a new channel has been opened, but it is
// still pending.
agent.OnChannelPendingOpen()
// The agent should now query the heuristic in order to determine its
// next action as its local state has now been modified.
wg.Add(1)
go func() {
defer wg.Done()
select {
case heuristic.moreChansResps <- moreChansResp{false, 0, 0}:
case <-time.After(time.Second * 10):
t.Fatalf("heuristic wasn't queried in time")
}
}()
// We'll wait here for either the agent to query the heuristic to be
// queried, or for the timeout above to tick.
wg.Wait()
// There shouldn't be a call to the Select method as we've returned
// "false" for NeedMoreChans above.
select {
case heuristic.directiveResps <- []AttachmentDirective{}:
t.Fatalf("Select was called but shouldn't have been")
default:
}
}

7
cmd/lncli/commands.go
View File

@ -469,6 +469,12 @@ var openChannelCommand = cli.Command{
"not set, we will scale the value according to the " + "not set, we will scale the value according to the " +
"channel size", "channel size",
}, },
cli.Uint64Flag{
Name: "min_confs",
Usage: "(optional) the minimum number of confirmations " +
"each one of your outputs used for the funding " +
"transaction must satisfy",
},
}, },
Action: actionDecorator(openChannel), Action: actionDecorator(openChannel),
} }
@ -493,6 +499,7 @@ func openChannel(ctx *cli.Context) error {
SatPerByte: ctx.Int64("sat_per_byte"), SatPerByte: ctx.Int64("sat_per_byte"),
MinHtlcMsat: ctx.Int64("min_htlc_msat"), MinHtlcMsat: ctx.Int64("min_htlc_msat"),
RemoteCsvDelay: uint32(ctx.Uint64("remote_csv_delay")), RemoteCsvDelay: uint32(ctx.Uint64("remote_csv_delay")),
MinConfs: int32(ctx.Uint64("min_confs")),
} }
switch { switch {

7
config.go
View File

@ -146,6 +146,7 @@ type autoPilotConfig struct {
MinChannelSize int64 `long:"minchansize" description:"The smallest channel that the autopilot agent should create"` MinChannelSize int64 `long:"minchansize" description:"The smallest channel that the autopilot agent should create"`
MaxChannelSize int64 `long:"maxchansize" description:"The largest channel that the autopilot agent should create"` MaxChannelSize int64 `long:"maxchansize" description:"The largest channel that the autopilot agent should create"`
Private bool `long:"private" description:"Whether the channels created by the autopilot agent should be private or not. Private channels won't be announced to the network."` Private bool `long:"private" description:"Whether the channels created by the autopilot agent should be private or not. Private channels won't be announced to the network."`
MinConfs int32 `long:"minconfs" description:"The minimum number of confirmations each of your inputs in funding transactions created by the autopilot agent must have."`
} }
type torConfig struct { type torConfig struct {
@ -424,6 +425,12 @@ func loadConfig() (*config, error) {
fmt.Fprintln(os.Stderr, err) fmt.Fprintln(os.Stderr, err)
return nil, err return nil, err
} }
if cfg.Autopilot.MinConfs < 0 {
str := "%s: autopilot.minconfs must be non-negative"
err := fmt.Errorf(str, funcName)
fmt.Fprintln(os.Stderr, err)
return nil, err
}
// Ensure that the specified values for the min and max channel size // Ensure that the specified values for the min and max channel size
// don't are within the bounds of the normal chan size constraints. // don't are within the bounds of the normal chan size constraints.

39
fundingmanager.go
View File

@ -1042,12 +1042,20 @@ func (f *fundingManager) handleFundingOpen(fmsg *fundingOpenMsg) {
// responding side of a single funder workflow, we don't commit any // responding side of a single funder workflow, we don't commit any
// funds to the channel ourselves. // funds to the channel ourselves.
chainHash := chainhash.Hash(msg.ChainHash) chainHash := chainhash.Hash(msg.ChainHash)
reservation, err := f.cfg.Wallet.InitChannelReservation( req := &lnwallet.InitFundingReserveMsg{
amt, 0, msg.PushAmount, ChainHash: &chainHash,
lnwallet.SatPerKWeight(msg.FeePerKiloWeight), 0, NodeID: fmsg.peer.IdentityKey(),
fmsg.peer.IdentityKey(), fmsg.peer.Address(), &chainHash, NodeAddr: fmsg.peer.Address(),
msg.ChannelFlags, FundingAmount: 0,
) Capacity: amt,
CommitFeePerKw: lnwallet.SatPerKWeight(msg.FeePerKiloWeight),
FundingFeePerKw: 0,
PushMSat: msg.PushAmount,
Flags: msg.ChannelFlags,
MinConfs: 1,
}
reservation, err := f.cfg.Wallet.InitChannelReservation(req)
if err != nil { if err != nil {
fndgLog.Errorf("Unable to initialize reservation: %v", err) fndgLog.Errorf("Unable to initialize reservation: %v", err)
f.failFundingFlow(fmsg.peer, msg.PendingChannelID, err) f.failFundingFlow(fmsg.peer, msg.PendingChannelID, err)
@ -2598,11 +2606,20 @@ func (f *fundingManager) handleInitFundingMsg(msg *initFundingMsg) {
// Initialize a funding reservation with the local wallet. If the // Initialize a funding reservation with the local wallet. If the
// wallet doesn't have enough funds to commit to this channel, then the // wallet doesn't have enough funds to commit to this channel, then the
// request will fail, and be aborted. // request will fail, and be aborted.
reservation, err := f.cfg.Wallet.InitChannelReservation( req := &lnwallet.InitFundingReserveMsg{
capacity, localAmt, msg.pushAmt, commitFeePerKw, ChainHash: &msg.chainHash,
msg.fundingFeePerKw, peerKey, msg.peer.Address(), NodeID: peerKey,
&msg.chainHash, channelFlags, NodeAddr: msg.peer.Address(),
) FundingAmount: localAmt,
Capacity: capacity,
CommitFeePerKw: commitFeePerKw,
FundingFeePerKw: msg.fundingFeePerKw,
PushMSat: msg.pushAmt,
Flags: channelFlags,
MinConfs: msg.minConfs,
}
reservation, err := f.cfg.Wallet.InitChannelReservation(req)
if err != nil { if err != nil {
msg.err <- err msg.err <- err
return return

96
lnd_test.go
View File

@ -153,7 +153,7 @@ func openChannelAndAssert(ctx context.Context, t *harnessTest,
private bool) *lnrpc.ChannelPoint { private bool) *lnrpc.ChannelPoint {
chanOpenUpdate, err := net.OpenChannel( chanOpenUpdate, err := net.OpenChannel(
ctx, alice, bob, fundingAmt, pushAmt, private, ctx, alice, bob, fundingAmt, pushAmt, private, true,
) )
if err != nil { if err != nil {
t.Fatalf("unable to open channel: %v", err) t.Fatalf("unable to open channel: %v", err)
@ -677,6 +677,82 @@ func testBasicChannelFunding(net *lntest.NetworkHarness, t *harnessTest) {
closeChannelAndAssert(ctxt, t, net, net.Alice, chanPoint, false) closeChannelAndAssert(ctxt, t, net, net.Alice, chanPoint, false)
} }
// testUnconfirmedChannelFunding tests that unconfirmed outputs that pay to us
// can be used to fund channels.
func testUnconfirmedChannelFunding(net *lntest.NetworkHarness, t *harnessTest) {
const (
timeout = time.Duration(15 * time.Second)
chanAmt = maxBtcFundingAmount
pushAmt = btcutil.Amount(100000)
)
ctxb := context.Background()
// We'll start off by creating a node for Carol.
carol, err := net.NewNode("Carol", nil)
if err != nil {
t.Fatalf("unable to create carol's node: %v", err)
}
defer shutdownAndAssert(net, t, carol)
// We'll send her some funds that should not confirm.
ctxt, _ := context.WithTimeout(ctxb, timeout)
err = net.SendCoinsUnconfirmed(ctxt, 2*chanAmt, carol)
if err != nil {
t.Fatalf("unable to send coins to carol: %v", err)
}
// Now, we'll connect her to Alice so that they can open a channel
// together. The funding flow should select Carol's unconfirmed output
// as she doesn't have any other funds since it's a new node.
ctxt, _ = context.WithTimeout(ctxb, timeout)
if err := net.ConnectNodes(ctxt, carol, net.Alice); err != nil {
t.Fatalf("unable to connect dave to alice: %v", err)
}
ctxt, _ = context.WithTimeout(ctxb, timeout)
chanOpenUpdate, err := net.OpenChannel(
ctxt, carol, net.Alice, chanAmt, pushAmt, false, false,
)
if err != nil {
t.Fatalf("unable to open channel between carol and alice: %v",
err)
}
// Confirm the channel and wait for it to be recognized by both parties.
mineBlocks(t, net, 6)
ctxt, _ = context.WithTimeout(ctxb, timeout)
chanPoint, err := net.WaitForChannelOpen(ctxt, chanOpenUpdate)
if err != nil {
t.Fatalf("error while waiting for channel open: %v", err)
}
// With the channel open, we'll check the balances on each side of the
// channel as a sanity check to ensure things worked out as intended.
balReq := &lnrpc.ChannelBalanceRequest{}
ctxt, _ = context.WithTimeout(ctxb, timeout)
carolBal, err := carol.ChannelBalance(ctxt, balReq)
if err != nil {
t.Fatalf("unable to get carol's balance: %v", err)
}
ctxt, _ = context.WithTimeout(ctxb, timeout)
aliceBal, err := net.Alice.ChannelBalance(ctxt, balReq)
if err != nil {
t.Fatalf("unable to get alice's balance: %v", err)
}
if carolBal.Balance != int64(chanAmt-pushAmt-calcStaticFee(0)) {
t.Fatalf("carol's balance is incorrect: expected %v got %v",
chanAmt-pushAmt-calcStaticFee(0), carolBal)
}
if aliceBal.Balance != int64(pushAmt) {
t.Fatalf("alice's balance is incorrect: expected %v got %v",
pushAmt, aliceBal.Balance)
}
// Now that we're done with the test, the channel can be closed.
ctxt, _ = context.WithTimeout(ctxb, timeout)
closeChannelAndAssert(ctxt, t, net, carol, chanPoint, false)
}
// txStr returns the string representation of the channel's funding transaction. // txStr returns the string representation of the channel's funding transaction.
func txStr(chanPoint *lnrpc.ChannelPoint) string { func txStr(chanPoint *lnrpc.ChannelPoint) string {
txidHash, err := getChanPointFundingTxid(chanPoint) txidHash, err := getChanPointFundingTxid(chanPoint)
@ -3699,8 +3775,9 @@ func testPrivateChannels(net *lntest.NetworkHarness, t *harnessTest) {
if err := net.ConnectNodes(ctxb, carol, net.Alice); err != nil { if err := net.ConnectNodes(ctxb, carol, net.Alice); err != nil {
t.Fatalf("unable to connect dave to alice: %v", err) t.Fatalf("unable to connect dave to alice: %v", err)
} }
chanOpenUpdate, err := net.OpenChannel(ctxb, carol, net.Alice, chanAmt, chanOpenUpdate, err := net.OpenChannel(
0, true) ctxb, carol, net.Alice, chanAmt, 0, true, true,
)
if err != nil { if err != nil {
t.Fatalf("unable to open channel: %v", err) t.Fatalf("unable to open channel: %v", err)
} }
@ -4581,8 +4658,9 @@ func testMaxPendingChannels(net *lntest.NetworkHarness, t *harnessTest) {
openStreams := make([]lnrpc.Lightning_OpenChannelClient, maxPendingChannels) openStreams := make([]lnrpc.Lightning_OpenChannelClient, maxPendingChannels)
for i := 0; i < maxPendingChannels; i++ { for i := 0; i < maxPendingChannels; i++ {
ctx, _ = context.WithTimeout(context.Background(), timeout) ctx, _ = context.WithTimeout(context.Background(), timeout)
stream, err := net.OpenChannel(ctx, net.Alice, carol, amount, stream, err := net.OpenChannel(
0, false) ctx, net.Alice, carol, amount, 0, false, true,
)
if err != nil { if err != nil {
t.Fatalf("unable to open channel: %v", err) t.Fatalf("unable to open channel: %v", err)
} }
@ -4592,7 +4670,9 @@ func testMaxPendingChannels(net *lntest.NetworkHarness, t *harnessTest) {
// Carol exhausted available amount of pending channels, next open // Carol exhausted available amount of pending channels, next open
// channel request should cause ErrorGeneric to be sent back to Alice. // channel request should cause ErrorGeneric to be sent back to Alice.
ctx, _ = context.WithTimeout(context.Background(), timeout) ctx, _ = context.WithTimeout(context.Background(), timeout)
_, err = net.OpenChannel(ctx, net.Alice, carol, amount, 0, false) _, err = net.OpenChannel(
ctx, net.Alice, carol, amount, 0, false, true,
)
if err == nil { if err == nil {
t.Fatalf("error wasn't received") t.Fatalf("error wasn't received")
} else if grpc.Code(err) != lnwire.ErrMaxPendingChannels.ToGrpcCode() { } else if grpc.Code(err) != lnwire.ErrMaxPendingChannels.ToGrpcCode() {
@ -11060,6 +11140,10 @@ var testsCases = []*testCase{
name: "basic funding flow", name: "basic funding flow",
test: testBasicChannelFunding, test: testBasicChannelFunding,
}, },
{
name: "unconfirmed channel funding",
test: testUnconfirmedChannelFunding,
},
{ {
name: "update channel policy", name: "update channel policy",
test: testUpdateChannelPolicy, test: testUpdateChannelPolicy,

791
lnrpc/rpc.pb.go
View File

@ -2214,6 +2214,8 @@ type OpenChannelRequest struct {
MinHtlcMsat int64 `protobuf:"varint,9,opt,name=min_htlc_msat" json:"min_htlc_msat,omitempty"` MinHtlcMsat int64 `protobuf:"varint,9,opt,name=min_htlc_msat" json:"min_htlc_msat,omitempty"`
// / The delay we require on the remote's commitment transaction. If this is not set, it will be scaled automatically with the channel size. // / The delay we require on the remote's commitment transaction. If this is not set, it will be scaled automatically with the channel size.
RemoteCsvDelay uint32 `protobuf:"varint,10,opt,name=remote_csv_delay" json:"remote_csv_delay,omitempty"` RemoteCsvDelay uint32 `protobuf:"varint,10,opt,name=remote_csv_delay" json:"remote_csv_delay,omitempty"`
// / The minimum number of confirmations each one of your outputs used for the funding transaction must satisfy.
MinConfs int32 `protobuf:"varint,11,opt,name=min_confs" json:"min_confs,omitempty"`
} }
func (m *OpenChannelRequest) Reset() { *m = OpenChannelRequest{} } func (m *OpenChannelRequest) Reset() { *m = OpenChannelRequest{} }
@ -2284,6 +2286,13 @@ func (m *OpenChannelRequest) GetRemoteCsvDelay() uint32 {
return 0 return 0
} }
func (m *OpenChannelRequest) GetMinConfs() int32 {
if m != nil {
return m.MinConfs
}
return 0
}
type OpenStatusUpdate struct { type OpenStatusUpdate struct {
// Types that are valid to be assigned to Update: // Types that are valid to be assigned to Update:
// *OpenStatusUpdate_ChanPending // *OpenStatusUpdate_ChanPending
@ -7093,395 +7102,395 @@ var _Lightning_serviceDesc = grpc.ServiceDesc{
func init() { proto.RegisterFile("rpc.proto", fileDescriptor0) } func init() { proto.RegisterFile("rpc.proto", fileDescriptor0) }
var fileDescriptor0 = []byte{ var fileDescriptor0 = []byte{
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} }

4
lnrpc/rpc.proto
View File

@ -1129,7 +1129,6 @@ message PendingUpdate {
} }
message OpenChannelRequest { message OpenChannelRequest {
/// The pubkey of the node to open a channel with /// The pubkey of the node to open a channel with
bytes node_pubkey = 2 [json_name = "node_pubkey"]; bytes node_pubkey = 2 [json_name = "node_pubkey"];
@ -1156,6 +1155,9 @@ message OpenChannelRequest {
/// The delay we require on the remote's commitment transaction. If this is not set, it will be scaled automatically with the channel size. /// The delay we require on the remote's commitment transaction. If this is not set, it will be scaled automatically with the channel size.
uint32 remote_csv_delay = 10 [json_name = "remote_csv_delay"]; uint32 remote_csv_delay = 10 [json_name = "remote_csv_delay"];
/// The minimum number of confirmations each one of your outputs used for the funding transaction must satisfy.
int32 min_confs = 11 [json_name = "min_confs"];
} }
message OpenStatusUpdate { message OpenStatusUpdate {
oneof update { oneof update {

5
lnrpc/rpc.swagger.json
View File

@ -2164,6 +2164,11 @@
"type": "integer", "type": "integer",
"format": "int64", "format": "int64",
"description": "/ The delay we require on the remote's commitment transaction. If this is not set, it will be scaled automatically with the channel size." "description": "/ The delay we require on the remote's commitment transaction. If this is not set, it will be scaled automatically with the channel size."
},
"min_confs": {
"type": "integer",
"format": "int32",
"description": "/ The minimum number of confirmations each one of your outputs used for the funding transaction must satisfy."
} }
} }
}, },

71
lntest/harness.go
View File

@ -676,10 +676,12 @@ func (n *NetworkHarness) WaitForTxBroadcast(ctx context.Context, txid chainhash.
// OpenChannel attempts to open a channel between srcNode and destNode with the // OpenChannel attempts to open a channel between srcNode and destNode with the
// passed channel funding parameters. If the passed context has a timeout, then // passed channel funding parameters. If the passed context has a timeout, then
// if the timeout is reached before the channel pending notification is // if the timeout is reached before the channel pending notification is
// received, an error is returned. // received, an error is returned. The confirmed boolean determines whether we
// should fund the channel with confirmed outputs or not.
func (n *NetworkHarness) OpenChannel(ctx context.Context, func (n *NetworkHarness) OpenChannel(ctx context.Context,
srcNode, destNode *HarnessNode, amt btcutil.Amount, srcNode, destNode *HarnessNode, amt btcutil.Amount,
pushAmt btcutil.Amount, private bool) (lnrpc.Lightning_OpenChannelClient, error) { pushAmt btcutil.Amount,
private, confirmed bool) (lnrpc.Lightning_OpenChannelClient, error) {
// Wait until srcNode and destNode have the latest chain synced. // Wait until srcNode and destNode have the latest chain synced.
// Otherwise, we may run into a check within the funding manager that // Otherwise, we may run into a check within the funding manager that
@ -692,11 +694,17 @@ func (n *NetworkHarness) OpenChannel(ctx context.Context,
return nil, fmt.Errorf("Unable to sync destNode chain: %v", err) return nil, fmt.Errorf("Unable to sync destNode chain: %v", err)
} }
minConfs := int32(0)
if confirmed {
minConfs = 1
}
openReq := &lnrpc.OpenChannelRequest{ openReq := &lnrpc.OpenChannelRequest{
NodePubkey: destNode.PubKey[:], NodePubkey: destNode.PubKey[:],
LocalFundingAmount: int64(amt), LocalFundingAmount: int64(amt),
PushSat: int64(pushAmt), PushSat: int64(pushAmt),
Private: private, Private: private,
MinConfs: minConfs,
} }
respStream, err := srcNode.OpenChannel(ctx, openReq) respStream, err := srcNode.OpenChannel(ctx, openReq)
@ -1104,12 +1112,26 @@ func (n *NetworkHarness) DumpLogs(node *HarnessNode) (string, error) {
} }
// SendCoins attempts to send amt satoshis from the internal mining node to the // SendCoins attempts to send amt satoshis from the internal mining node to the
// targeted lightning node using a P2WKH address. // targeted lightning node using a P2WKH address. 6 blocks are mined after in
// order to confirm the transaction.
func (n *NetworkHarness) SendCoins(ctx context.Context, amt btcutil.Amount, func (n *NetworkHarness) SendCoins(ctx context.Context, amt btcutil.Amount,
target *HarnessNode) error { target *HarnessNode) error {
return n.sendCoins( return n.sendCoins(
ctx, amt, target, lnrpc.NewAddressRequest_WITNESS_PUBKEY_HASH, ctx, amt, target, lnrpc.NewAddressRequest_WITNESS_PUBKEY_HASH,
true,
)
}
// SendCoinsUnconfirmed sends coins from the internal mining node to the target
// lightning node using a P2WPKH address. No blocks are mined after, so the
// transaction remains unconfirmed.
func (n *NetworkHarness) SendCoinsUnconfirmed(ctx context.Context,
amt btcutil.Amount, target *HarnessNode) error {
return n.sendCoins(
ctx, amt, target, lnrpc.NewAddressRequest_WITNESS_PUBKEY_HASH,
false,
) )
} }
@ -1120,14 +1142,16 @@ func (n *NetworkHarness) SendCoinsNP2WKH(ctx context.Context,
return n.sendCoins( return n.sendCoins(
ctx, amt, target, lnrpc.NewAddressRequest_NESTED_PUBKEY_HASH, ctx, amt, target, lnrpc.NewAddressRequest_NESTED_PUBKEY_HASH,
true,
) )
} }
// sendCoins attempts to send amt satoshis from the internal mining node to the // sendCoins attempts to send amt satoshis from the internal mining node to the
// targeted lightning node. // targeted lightning node. The confirmed boolean indicates whether the
// transaction that pays to the target should confirm.
func (n *NetworkHarness) sendCoins(ctx context.Context, amt btcutil.Amount, func (n *NetworkHarness) sendCoins(ctx context.Context, amt btcutil.Amount,
target *HarnessNode, target *HarnessNode, addrType lnrpc.NewAddressRequest_AddressType,
addrType lnrpc.NewAddressRequest_AddressType) error { confirmed bool) error {
balReq := &lnrpc.WalletBalanceRequest{} balReq := &lnrpc.WalletBalanceRequest{}
initialBalance, err := target.WalletBalance(ctx, balReq) initialBalance, err := target.WalletBalance(ctx, balReq)
@ -1165,30 +1189,21 @@ func (n *NetworkHarness) sendCoins(ctx context.Context, amt btcutil.Amount,
return err return err
} }
// Finally, generate 6 new blocks to ensure the output gains a // If the transaction should remain unconfirmed, then we'll wait until
// sufficient number of confirmations. // the target node's unconfirmed balance reflects the expected balance
// and exit.
if !confirmed {
expectedBalance := initialBalance.UnconfirmedBalance + int64(amt)
return target.WaitForBalance(expectedBalance, false)
}
// Otherwise, we'll generate 6 new blocks to ensure the output gains a
// sufficient number of confirmations and wait for the balance to
// reflect what's expected.
if _, err := n.Miner.Node.Generate(6); err != nil { if _, err := n.Miner.Node.Generate(6); err != nil {
return err return err
} }
// Pause until the nodes current wallet balances reflects the amount expectedBalance := initialBalance.ConfirmedBalance + int64(amt)
// sent to it above. return target.WaitForBalance(expectedBalance, true)
// TODO(roasbeef): factor out into helper func
balanceTicker := time.Tick(time.Millisecond * 50)
balanceTimeout := time.After(time.Second * 30)
for {
select {
case <-balanceTicker:
currentBal, err := target.WalletBalance(ctx, balReq)
if err != nil {
return err
}
if currentBal.ConfirmedBalance == initialBalance.ConfirmedBalance+int64(amt) {
return nil
}
case <-balanceTimeout:
return fmt.Errorf("balances not synced after deadline")
}
}
} }

27
lntest/node.go
View File

@ -895,6 +895,33 @@ func (hn *HarnessNode) WaitForBlockchainSync(ctx context.Context) error {
} }
} }
// WaitForBalance waits until the node sees the expected confirmed/unconfirmed
// balance within their wallet.
func (hn *HarnessNode) WaitForBalance(expectedBalance int64, confirmed bool) error {
ctx := context.Background()
req := &lnrpc.WalletBalanceRequest{}
doesBalanceMatch := func() bool {
balance, err := hn.WalletBalance(ctx, req)
if err != nil {
return false
}
if confirmed {
return balance.ConfirmedBalance == expectedBalance
}
return balance.UnconfirmedBalance == expectedBalance
}
err := WaitPredicate(doesBalanceMatch, 30*time.Second)
if err != nil {
return errors.New("balances not synced after deadline")
}
return nil
}
// fileExists reports whether the named file or directory exists. // fileExists reports whether the named file or directory exists.
// This function is taken from https://github.com/btcsuite/btcd // This function is taken from https://github.com/btcsuite/btcd
func fileExists(name string) bool { func fileExists(name string) bool {

139
lnwallet/interface_test.go
View File

@ -294,10 +294,18 @@ func testDualFundingReservationWorkflow(miner *rpctest.Harness,
if err != nil { if err != nil {
t.Fatalf("unable to query fee estimator: %v", err) t.Fatalf("unable to query fee estimator: %v", err)
} }
aliceChanReservation, err := alice.InitChannelReservation( aliceReq := &lnwallet.InitFundingReserveMsg{
fundingAmount*2, fundingAmount, 0, feePerKw, feePerKw, bobPub, ChainHash: chainHash,
bobAddr, chainHash, lnwire.FFAnnounceChannel, NodeID: bobPub,
) NodeAddr: bobAddr,
FundingAmount: fundingAmount,
Capacity: fundingAmount * 2,
CommitFeePerKw: feePerKw,
FundingFeePerKw: feePerKw,
PushMSat: 0,
Flags: lnwire.FFAnnounceChannel,
}
aliceChanReservation, err := alice.InitChannelReservation(aliceReq)
if err != nil { if err != nil {
t.Fatalf("unable to initialize funding reservation: %v", err) t.Fatalf("unable to initialize funding reservation: %v", err)
} }
@ -325,10 +333,18 @@ func testDualFundingReservationWorkflow(miner *rpctest.Harness,
// Bob does the same, generating his own contribution. He then also // Bob does the same, generating his own contribution. He then also
// receives' Alice's contribution, and consumes that so we can continue // receives' Alice's contribution, and consumes that so we can continue
// the funding process. // the funding process.
bobChanReservation, err := bob.InitChannelReservation( bobReq := &lnwallet.InitFundingReserveMsg{
fundingAmount*2, fundingAmount, 0, feePerKw, feePerKw, alicePub, ChainHash: chainHash,
aliceAddr, chainHash, lnwire.FFAnnounceChannel, NodeID: alicePub,
) NodeAddr: aliceAddr,
FundingAmount: fundingAmount,
Capacity: fundingAmount * 2,
CommitFeePerKw: feePerKw,
FundingFeePerKw: feePerKw,
PushMSat: 0,
Flags: lnwire.FFAnnounceChannel,
}
bobChanReservation, err := bob.InitChannelReservation(bobReq)
if err != nil { if err != nil {
t.Fatalf("bob unable to init channel reservation: %v", err) t.Fatalf("bob unable to init channel reservation: %v", err)
} }
@ -481,11 +497,18 @@ func testFundingTransactionLockedOutputs(miner *rpctest.Harness,
if err != nil { if err != nil {
t.Fatalf("unable to query fee estimator: %v", err) t.Fatalf("unable to query fee estimator: %v", err)
} }
_, err = alice.InitChannelReservation( req := &lnwallet.InitFundingReserveMsg{
fundingAmount, fundingAmount, 0, feePerKw, feePerKw, bobPub, ChainHash: chainHash,
bobAddr, chainHash, lnwire.FFAnnounceChannel, NodeID: bobPub,
) NodeAddr: bobAddr,
if err != nil { FundingAmount: fundingAmount,
Capacity: fundingAmount,
CommitFeePerKw: feePerKw,
FundingFeePerKw: feePerKw,
PushMSat: 0,
Flags: lnwire.FFAnnounceChannel,
}
if _, err := alice.InitChannelReservation(req); err != nil {
t.Fatalf("unable to initialize funding reservation 1: %v", err) t.Fatalf("unable to initialize funding reservation 1: %v", err)
} }
@ -496,10 +519,18 @@ func testFundingTransactionLockedOutputs(miner *rpctest.Harness,
if err != nil { if err != nil {
t.Fatalf("unable to create amt: %v", err) t.Fatalf("unable to create amt: %v", err)
} }
failedReservation, err := alice.InitChannelReservation( failedReq := &lnwallet.InitFundingReserveMsg{
amt, amt, 0, feePerKw, feePerKw, bobPub, bobAddr, chainHash, ChainHash: chainHash,
lnwire.FFAnnounceChannel, NodeID: bobPub,
) NodeAddr: bobAddr,
FundingAmount: amt,
Capacity: amt,
CommitFeePerKw: feePerKw,
FundingFeePerKw: feePerKw,
PushMSat: 0,
Flags: lnwire.FFAnnounceChannel,
}
failedReservation, err := alice.InitChannelReservation(failedReq)
if err == nil { if err == nil {
t.Fatalf("not error returned, should fail on coin selection") t.Fatalf("not error returned, should fail on coin selection")
} }
@ -524,19 +555,24 @@ func testFundingCancellationNotEnoughFunds(miner *rpctest.Harness,
if err != nil { if err != nil {
t.Fatalf("unable to create amt: %v", err) t.Fatalf("unable to create amt: %v", err)
} }
chanReservation, err := alice.InitChannelReservation( req := &lnwallet.InitFundingReserveMsg{
fundingAmount, fundingAmount, 0, feePerKw, feePerKw, bobPub, ChainHash: chainHash,
bobAddr, chainHash, lnwire.FFAnnounceChannel, NodeID: bobPub,
) NodeAddr: bobAddr,
FundingAmount: fundingAmount,
Capacity: fundingAmount,
CommitFeePerKw: feePerKw,
FundingFeePerKw: feePerKw,
PushMSat: 0,
Flags: lnwire.FFAnnounceChannel,
}
chanReservation, err := alice.InitChannelReservation(req)
if err != nil { if err != nil {
t.Fatalf("unable to initialize funding reservation: %v", err) t.Fatalf("unable to initialize funding reservation: %v", err)
} }
// Attempt to create another channel with 44 BTC, this should fail. // Attempt to create another channel with 44 BTC, this should fail.
_, err = alice.InitChannelReservation( _, err = alice.InitChannelReservation(req)
fundingAmount, fundingAmount, 0, feePerKw, feePerKw, bobPub,
bobAddr, chainHash, lnwire.FFAnnounceChannel,
)
if _, ok := err.(*lnwallet.ErrInsufficientFunds); !ok { if _, ok := err.(*lnwallet.ErrInsufficientFunds); !ok {
t.Fatalf("coin selection succeeded should have insufficient funds: %v", t.Fatalf("coin selection succeeded should have insufficient funds: %v",
err) err)
@ -565,10 +601,7 @@ func testFundingCancellationNotEnoughFunds(miner *rpctest.Harness,
// attempting coin selection. // attempting coin selection.
// Request to fund a new channel should now succeed. // Request to fund a new channel should now succeed.
_, err = alice.InitChannelReservation(fundingAmount, fundingAmount, if _, err := alice.InitChannelReservation(req); err != nil {
0, feePerKw, feePerKw, bobPub, bobAddr, chainHash,
lnwire.FFAnnounceChannel)
if err != nil {
t.Fatalf("unable to initialize funding reservation: %v", err) t.Fatalf("unable to initialize funding reservation: %v", err)
} }
} }
@ -612,10 +645,18 @@ func testReservationInitiatorBalanceBelowDustCancel(miner *rpctest.Harness,
feePerKw := lnwallet.SatPerKWeight( feePerKw := lnwallet.SatPerKWeight(
numBTC * numBTC * btcutil.SatoshiPerBitcoin, numBTC * numBTC * btcutil.SatoshiPerBitcoin,
) )
_, err = alice.InitChannelReservation( req := &lnwallet.InitFundingReserveMsg{
fundingAmount, fundingAmount, 0, feePerKw, feePerKw, bobPub, ChainHash: chainHash,
bobAddr, chainHash, lnwire.FFAnnounceChannel, NodeID: bobPub,
) NodeAddr: bobAddr,
FundingAmount: fundingAmount,
Capacity: fundingAmount,
CommitFeePerKw: feePerKw,
FundingFeePerKw: feePerKw,
PushMSat: 0,
Flags: lnwire.FFAnnounceChannel,
}
_, err = alice.InitChannelReservation(req)
switch { switch {
case err == nil: case err == nil:
t.Fatalf("initialization should have failed due to " + t.Fatalf("initialization should have failed due to " +
@ -685,10 +726,18 @@ func testSingleFunderReservationWorkflow(miner *rpctest.Harness,
if err != nil { if err != nil {
t.Fatalf("unable to query fee estimator: %v", err) t.Fatalf("unable to query fee estimator: %v", err)
} }
aliceChanReservation, err := alice.InitChannelReservation( aliceReq := &lnwallet.InitFundingReserveMsg{
fundingAmt, fundingAmt, pushAmt, feePerKw, feePerKw, bobPub, ChainHash: chainHash,
bobAddr, chainHash, lnwire.FFAnnounceChannel, NodeID: bobPub,
) NodeAddr: bobAddr,
FundingAmount: fundingAmt,
Capacity: fundingAmt,
CommitFeePerKw: feePerKw,
FundingFeePerKw: feePerKw,
PushMSat: pushAmt,
Flags: lnwire.FFAnnounceChannel,
}
aliceChanReservation, err := alice.InitChannelReservation(aliceReq)
if err != nil { if err != nil {
t.Fatalf("unable to init channel reservation: %v", err) t.Fatalf("unable to init channel reservation: %v", err)
} }
@ -716,10 +765,18 @@ func testSingleFunderReservationWorkflow(miner *rpctest.Harness,
// Next, Bob receives the initial request, generates a corresponding // Next, Bob receives the initial request, generates a corresponding
// reservation initiation, then consume Alice's contribution. // reservation initiation, then consume Alice's contribution.
bobChanReservation, err := bob.InitChannelReservation( bobReq := &lnwallet.InitFundingReserveMsg{
fundingAmt, 0, pushAmt, feePerKw, feePerKw, alicePub, aliceAddr, ChainHash: chainHash,
chainHash, lnwire.FFAnnounceChannel, NodeID: alicePub,
) NodeAddr: aliceAddr,
FundingAmount: 0,
Capacity: fundingAmt,
CommitFeePerKw: feePerKw,
FundingFeePerKw: feePerKw,
PushMSat: pushAmt,
Flags: lnwire.FFAnnounceChannel,
}
bobChanReservation, err := bob.InitChannelReservation(bobReq)
if err != nil { if err != nil {
t.Fatalf("unable to create bob reservation: %v", err) t.Fatalf("unable to create bob reservation: %v", err)
} }

123
lnwallet/wallet.go
View File

@ -3,24 +3,24 @@ package lnwallet
import ( import (
"bytes" "bytes"
"crypto/sha256" "crypto/sha256"
"errors"
"fmt" "fmt"
"net" "net"
"sync" "sync"
"sync/atomic" "sync/atomic"
"github.com/btcsuite/btcd/blockchain" "github.com/btcsuite/btcd/blockchain"
"github.com/btcsuite/btcd/btcec"
"github.com/btcsuite/btcd/chaincfg/chainhash" "github.com/btcsuite/btcd/chaincfg/chainhash"
"github.com/btcsuite/btcd/txscript"
"github.com/btcsuite/btcd/wire"
"github.com/btcsuite/btcutil"
"github.com/btcsuite/btcutil/hdkeychain" "github.com/btcsuite/btcutil/hdkeychain"
"github.com/btcsuite/btcutil/txsort"
"github.com/davecgh/go-spew/spew" "github.com/davecgh/go-spew/spew"
"github.com/lightningnetwork/lnd/channeldb" "github.com/lightningnetwork/lnd/channeldb"
"github.com/lightningnetwork/lnd/keychain" "github.com/lightningnetwork/lnd/keychain"
"github.com/lightningnetwork/lnd/lnwire" "github.com/lightningnetwork/lnd/lnwire"
"github.com/btcsuite/btcd/btcec"
"github.com/btcsuite/btcd/txscript"
"github.com/btcsuite/btcd/wire"
"github.com/btcsuite/btcutil"
"github.com/btcsuite/btcutil/txsort"
"github.com/lightningnetwork/lnd/shachain" "github.com/lightningnetwork/lnd/shachain"
) )
@ -44,7 +44,7 @@ func (e *ErrInsufficientFunds) Error() string {
e.amountSelected) e.amountSelected)
} }
// initFundingReserveReq is the first message sent to initiate the workflow // InitFundingReserveMsg is the first message sent to initiate the workflow
// required to open a payment channel with a remote peer. The initial required // required to open a payment channel with a remote peer. The initial required
// parameters are configurable across channels. These parameters are to be // parameters are configurable across channels. These parameters are to be
// chosen depending on the fee climate within the network, and time value of // chosen depending on the fee climate within the network, and time value of
@ -54,44 +54,48 @@ func (e *ErrInsufficientFunds) Error() string {
// pending reservations. Therefore, all channels in reservation limbo will be // pending reservations. Therefore, all channels in reservation limbo will be
// periodically timed out after an idle period in order to avoid "exhaustion" // periodically timed out after an idle period in order to avoid "exhaustion"
// attacks. // attacks.
type initFundingReserveMsg struct { type InitFundingReserveMsg struct {
// chainHash denotes that chain to be used to ultimately open the // ChainHash denotes that chain to be used to ultimately open the
// target channel. // target channel.
chainHash *chainhash.Hash ChainHash *chainhash.Hash
// nodeId is the ID of the remote node we would like to open a channel // NodeID is the ID of the remote node we would like to open a channel
// with. // with.
nodeID *btcec.PublicKey NodeID *btcec.PublicKey
// nodeAddr is the address port that we used to either establish or // NodeAddr is the address port that we used to either establish or
// accept the connection which led to the negotiation of this funding // accept the connection which led to the negotiation of this funding
// workflow. // workflow.
nodeAddr net.Addr NodeAddr net.Addr
// fundingAmount is the amount of funds requested for this channel. // FundingAmount is the amount of funds requested for this channel.
fundingAmount btcutil.Amount FundingAmount btcutil.Amount
// capacity is the total capacity of the channel which includes the // Capacity is the total capacity of the channel which includes the
// amount of funds the remote party contributes (if any). // amount of funds the remote party contributes (if any).
capacity btcutil.Amount Capacity btcutil.Amount
// commitFeePerKw is the starting accepted satoshis/Kw fee for the set // CommitFeePerKw is the starting accepted satoshis/Kw fee for the set
// of initial commitment transactions. In order to ensure timely // of initial commitment transactions. In order to ensure timely
// confirmation, it is recommended that this fee should be generous, // confirmation, it is recommended that this fee should be generous,
// paying some multiple of the accepted base fee rate of the network. // paying some multiple of the accepted base fee rate of the network.
commitFeePerKw SatPerKWeight CommitFeePerKw SatPerKWeight
// fundingFeePerKw is the fee rate in sat/kw to use for the initial // FundingFeePerKw is the fee rate in sat/kw to use for the initial
// funding transaction. // funding transaction.
fundingFeePerKw SatPerKWeight FundingFeePerKw SatPerKWeight
// pushMSat is the number of milli-satoshis that should be pushed over // PushMSat is the number of milli-satoshis that should be pushed over
// the responder as part of the initial channel creation. // the responder as part of the initial channel creation.
pushMSat lnwire.MilliSatoshi PushMSat lnwire.MilliSatoshi
// flags are the channel flags specified by the initiator in the // Flags are the channel flags specified by the initiator in the
// open_channel message. // open_channel message.
flags lnwire.FundingFlag Flags lnwire.FundingFlag
// MinConfs indicates the minimum number of confirmations that each
// output selected to fund the channel should satisfy.
MinConfs int32
// err is a channel in which all errors will be sent across. Will be // err is a channel in which all errors will be sent across. Will be
// nil if this initial set is successful. // nil if this initial set is successful.
@ -372,7 +376,7 @@ out:
select { select {
case m := <-l.msgChan: case m := <-l.msgChan:
switch msg := m.(type) { switch msg := m.(type) {
case *initFundingReserveMsg: case *InitFundingReserveMsg:
l.handleFundingReserveRequest(msg) l.handleFundingReserveRequest(msg)
case *fundingReserveCancelMsg: case *fundingReserveCancelMsg:
l.handleFundingCancelRequest(msg) l.handleFundingCancelRequest(msg)
@ -412,36 +416,25 @@ out:
// transaction, and that the signature we record for our version of the // transaction, and that the signature we record for our version of the
// commitment transaction is valid. // commitment transaction is valid.
func (l *LightningWallet) InitChannelReservation( func (l *LightningWallet) InitChannelReservation(
capacity, ourFundAmt btcutil.Amount, pushMSat lnwire.MilliSatoshi, req *InitFundingReserveMsg) (*ChannelReservation, error) {
commitFeePerKw SatPerKWeight, fundingFeePerKw SatPerKWeight,
theirID *btcec.PublicKey, theirAddr net.Addr,
chainHash *chainhash.Hash, flags lnwire.FundingFlag) (*ChannelReservation, error) {
errChan := make(chan error, 1) req.resp = make(chan *ChannelReservation, 1)
respChan := make(chan *ChannelReservation, 1) req.err = make(chan error, 1)
l.msgChan <- &initFundingReserveMsg{ select {
chainHash: chainHash, case l.msgChan <- req:
nodeID: theirID, case <-l.quit:
nodeAddr: theirAddr, return nil, errors.New("wallet shutting down")
fundingAmount: ourFundAmt,
capacity: capacity,
commitFeePerKw: commitFeePerKw,
fundingFeePerKw: fundingFeePerKw,
pushMSat: pushMSat,
flags: flags,
err: errChan,
resp: respChan,
} }
return <-respChan, <-errChan return <-req.resp, <-req.err
} }
// handleFundingReserveRequest processes a message intending to create, and // handleFundingReserveRequest processes a message intending to create, and
// validate a funding reservation request. // validate a funding reservation request.
func (l *LightningWallet) handleFundingReserveRequest(req *initFundingReserveMsg) { func (l *LightningWallet) handleFundingReserveRequest(req *InitFundingReserveMsg) {
// It isn't possible to create a channel with zero funds committed. // It isn't possible to create a channel with zero funds committed.
if req.fundingAmount+req.capacity == 0 { if req.FundingAmount+req.Capacity == 0 {
err := ErrZeroCapacity() err := ErrZeroCapacity()
req.err <- err req.err <- err
req.resp <- nil req.resp <- nil
@ -450,18 +443,20 @@ func (l *LightningWallet) handleFundingReserveRequest(req *initFundingReserveMsg
// If the funding request is for a different chain than the one the // If the funding request is for a different chain than the one the
// wallet is aware of, then we'll reject the request. // wallet is aware of, then we'll reject the request.
if !bytes.Equal(l.Cfg.NetParams.GenesisHash[:], req.chainHash[:]) { if !bytes.Equal(l.Cfg.NetParams.GenesisHash[:], req.ChainHash[:]) {
err := ErrChainMismatch(l.Cfg.NetParams.GenesisHash, err := ErrChainMismatch(
req.chainHash) l.Cfg.NetParams.GenesisHash, req.ChainHash,
)
req.err <- err req.err <- err
req.resp <- nil req.resp <- nil
return return
} }
id := atomic.AddUint64(&l.nextFundingID, 1) id := atomic.AddUint64(&l.nextFundingID, 1)
reservation, err := NewChannelReservation(req.capacity, req.fundingAmount, reservation, err := NewChannelReservation(
req.commitFeePerKw, l, id, req.pushMSat, req.Capacity, req.FundingAmount, req.CommitFeePerKw, l, id,
l.Cfg.NetParams.GenesisHash, req.flags) req.PushMSat, l.Cfg.NetParams.GenesisHash, req.Flags,
)
if err != nil { if err != nil {
req.err <- err req.err <- err
req.resp <- nil req.resp <- nil
@ -472,17 +467,17 @@ func (l *LightningWallet) handleFundingReserveRequest(req *initFundingReserveMsg
reservation.Lock() reservation.Lock()
defer reservation.Unlock() defer reservation.Unlock()
reservation.nodeAddr = req.nodeAddr reservation.nodeAddr = req.NodeAddr
reservation.partialState.IdentityPub = req.nodeID reservation.partialState.IdentityPub = req.NodeID
// If we're on the receiving end of a single funder channel then we // If we're on the receiving end of a single funder channel then we
// don't need to perform any coin selection. Otherwise, attempt to // don't need to perform any coin selection. Otherwise, attempt to
// obtain enough coins to meet the required funding amount. // obtain enough coins to meet the required funding amount.
if req.fundingAmount != 0 { if req.FundingAmount != 0 {
// Coin selection is done on the basis of sat/kw, so we'll use // Coin selection is done on the basis of sat/kw, so we'll use
// the fee rate passed in to perform coin selection. // the fee rate passed in to perform coin selection.
err := l.selectCoinsAndChange( err := l.selectCoinsAndChange(
req.fundingFeePerKw, req.fundingAmount, req.FundingFeePerKw, req.FundingAmount, req.MinConfs,
reservation.ourContribution, reservation.ourContribution,
) )
if err != nil { if err != nil {
@ -1265,9 +1260,10 @@ func (l *LightningWallet) handleSingleFunderSigs(req *addSingleFunderSigsMsg) {
// selection is successful/possible, then the selected coins are available // selection is successful/possible, then the selected coins are available
// within the passed contribution's inputs. If necessary, a change address will // within the passed contribution's inputs. If necessary, a change address will
// also be generated. // also be generated.
// TODO(roasbeef): remove hardcoded fees and req'd confs for outputs. // TODO(roasbeef): remove hardcoded fees.
func (l *LightningWallet) selectCoinsAndChange(feeRate SatPerKWeight, func (l *LightningWallet) selectCoinsAndChange(feeRate SatPerKWeight,
amt btcutil.Amount, contribution *ChannelContribution) error { amt btcutil.Amount, minConfs int32,
contribution *ChannelContribution) error {
// We hold the coin select mutex while querying for outputs, and // We hold the coin select mutex while querying for outputs, and
// performing coin selection in order to avoid inadvertent double // performing coin selection in order to avoid inadvertent double
@ -1278,10 +1274,9 @@ func (l *LightningWallet) selectCoinsAndChange(feeRate SatPerKWeight,
walletLog.Infof("Performing funding tx coin selection using %v "+ walletLog.Infof("Performing funding tx coin selection using %v "+
"sat/kw as fee rate", int64(feeRate)) "sat/kw as fee rate", int64(feeRate))
// Find all unlocked unspent witness outputs with greater than 1 // Find all unlocked unspent witness outputs that satisfy the minimum
// confirmation. // number of confirmations required.
// TODO(roasbeef): make num confs a configuration parameter coins, err := l.ListUnspentWitness(minConfs)
coins, err := l.ListUnspentWitness(1)
if err != nil { if err != nil {
return err return err
} }

21
pilot.go
View File

@ -19,6 +19,7 @@ import (
type chanController struct { type chanController struct {
server *server server *server
private bool private bool
minConfs int32
} }
// OpenChannel opens a channel to a target peer, with a capacity of the // OpenChannel opens a channel to a target peer, with a capacity of the
@ -37,10 +38,21 @@ func (c *chanController) OpenChannel(target *btcec.PublicKey,
// TODO(halseth): make configurable? // TODO(halseth): make configurable?
minHtlc := lnwire.NewMSatFromSatoshis(1) minHtlc := lnwire.NewMSatFromSatoshis(1)
updateStream, errChan := c.server.OpenChannel( // Construct the open channel request and send it to the server to begin
target, amt, 0, minHtlc, feePerKw, c.private, 0, // the funding workflow.
) req := &openChanReq{
targetPubkey: target,
chainHash: *activeNetParams.GenesisHash,
localFundingAmt: amt,
pushAmt: 0,
minHtlc: minHtlc,
fundingFeePerKw: feePerKw,
private: c.private,
remoteCsvDelay: 0,
minConfs: c.minConfs,
}
updateStream, errChan := c.server.OpenChannel(req)
select { select {
case err := <-errChan: case err := <-errChan:
// If we were not able to actually open a channel to the peer // If we were not able to actually open a channel to the peer
@ -102,9 +114,10 @@ func initAutoPilot(svr *server, cfg *autoPilotConfig) (*autopilot.Agent, error)
ChanController: &chanController{ ChanController: &chanController{
server: svr, server: svr,
private: cfg.Private, private: cfg.Private,
minConfs: cfg.MinConfs,
}, },
WalletBalance: func() (btcutil.Amount, error) { WalletBalance: func() (btcutil.Amount, error) {
return svr.cc.wallet.ConfirmedBalance(1) return svr.cc.wallet.ConfirmedBalance(cfg.MinConfs)
}, },
Graph: autopilot.ChannelGraphFromDatabase(svr.chanDB.ChannelGraph()), Graph: autopilot.ChannelGraphFromDatabase(svr.chanDB.ChannelGraph()),
MaxPendingOpens: 10, MaxPendingOpens: 10,

47
rpcserver.go
View File

@ -770,6 +770,12 @@ func (r *rpcServer) OpenChannel(in *lnrpc.OpenChannelRequest,
"size is: %v SAT", int64(minChanFundingSize)) "size is: %v SAT", int64(minChanFundingSize))
} }
// Ensure that the MinConfs parameter is non-negative.
if in.MinConfs < 0 {
return errors.New("minimum number of confirmations must be a " +
"non-negative number")
}
var ( var (
nodePubKey *btcec.PublicKey nodePubKey *btcec.PublicKey
nodePubKeyBytes []byte nodePubKeyBytes []byte
@ -813,11 +819,19 @@ func (r *rpcServer) OpenChannel(in *lnrpc.OpenChannelRequest,
// Instruct the server to trigger the necessary events to attempt to // Instruct the server to trigger the necessary events to attempt to
// open a new channel. A stream is returned in place, this stream will // open a new channel. A stream is returned in place, this stream will
// be used to consume updates of the state of the pending channel. // be used to consume updates of the state of the pending channel.
updateChan, errChan := r.server.OpenChannel( req := &openChanReq{
nodePubKey, localFundingAmt, targetPubkey: nodePubKey,
lnwire.NewMSatFromSatoshis(remoteInitialBalance), chainHash: *activeNetParams.GenesisHash,
minHtlc, feeRate, in.Private, remoteCsvDelay, localFundingAmt: localFundingAmt,
) pushAmt: lnwire.NewMSatFromSatoshis(remoteInitialBalance),
minHtlc: minHtlc,
fundingFeePerKw: feeRate,
private: in.Private,
remoteCsvDelay: remoteCsvDelay,
minConfs: in.MinConfs,
}
updateChan, errChan := r.server.OpenChannel(req)
var outpoint wire.OutPoint var outpoint wire.OutPoint
out: out:
@ -929,6 +943,12 @@ func (r *rpcServer) OpenChannelSync(ctx context.Context,
"size is: %v SAT", int64(minChanFundingSize)) "size is: %v SAT", int64(minChanFundingSize))
} }
// Ensure that the MinConfs parameter is non-negative.
if in.MinConfs < 0 {
return nil, errors.New("minimum number of confirmations must " +
"be a non-negative number")
}
// Based on the passed fee related parameters, we'll determine an // Based on the passed fee related parameters, we'll determine an
// appropriate fee rate for the funding transaction. // appropriate fee rate for the funding transaction.
feeRate, err := determineFeePerKw( feeRate, err := determineFeePerKw(
@ -941,12 +961,19 @@ func (r *rpcServer) OpenChannelSync(ctx context.Context,
rpcsLog.Tracef("[openchannel] target sat/kw for funding tx: %v", rpcsLog.Tracef("[openchannel] target sat/kw for funding tx: %v",
int64(feeRate)) int64(feeRate))
updateChan, errChan := r.server.OpenChannel( req := &openChanReq{
nodepubKey, localFundingAmt, targetPubkey: nodepubKey,
lnwire.NewMSatFromSatoshis(remoteInitialBalance), chainHash: *activeNetParams.GenesisHash,
minHtlc, feeRate, in.Private, remoteCsvDelay, localFundingAmt: localFundingAmt,
) pushAmt: lnwire.NewMSatFromSatoshis(remoteInitialBalance),
minHtlc: minHtlc,
fundingFeePerKw: feeRate,
private: in.Private,
remoteCsvDelay: remoteCsvDelay,
minConfs: in.MinConfs,
}
updateChan, errChan := r.server.OpenChannel(req)
select { select {
// If an error occurs them immediately return the error to the client. // If an error occurs them immediately return the error to the client.
case err := <-errChan: case err := <-errChan:

82
server.go
View File

@ -2597,6 +2597,10 @@ type openChanReq struct {
remoteCsvDelay uint16 remoteCsvDelay uint16
// minConfs indicates the minimum number of confirmations that each
// output selected to fund the channel should satisfy.
minConfs int32
// TODO(roasbeef): add ability to specify channel constraints as well // TODO(roasbeef): add ability to specify channel constraints as well
updates chan *lnrpc.OpenStatusUpdate updates chan *lnrpc.OpenStatusUpdate
@ -2735,77 +2739,45 @@ func (s *server) DisconnectPeer(pubKey *btcec.PublicKey) error {
// peer identified by nodeKey with the passed channel funding parameters. // peer identified by nodeKey with the passed channel funding parameters.
// //
// NOTE: This function is safe for concurrent access. // NOTE: This function is safe for concurrent access.
func (s *server) OpenChannel(nodeKey *btcec.PublicKey, func (s *server) OpenChannel(
localAmt btcutil.Amount, pushAmt, minHtlc lnwire.MilliSatoshi, req *openChanReq) (chan *lnrpc.OpenStatusUpdate, chan error) {
fundingFeePerKw lnwallet.SatPerKWeight, private bool,
remoteCsvDelay uint16) (chan *lnrpc.OpenStatusUpdate, chan error) {
// The updateChan will have a buffer of 2, since we expect a // The updateChan will have a buffer of 2, since we expect a ChanPending
// ChanPending + a ChanOpen update, and we want to make sure the // + a ChanOpen update, and we want to make sure the funding process is
// funding process is not blocked if the caller is not reading the // not blocked if the caller is not reading the updates.
// updates. req.updates = make(chan *lnrpc.OpenStatusUpdate, 2)
updateChan := make(chan *lnrpc.OpenStatusUpdate, 2) req.err = make(chan error, 1)
errChan := make(chan error, 1)
var (
targetPeer *peer
pubKeyBytes []byte
err error
)
// If the user is targeting the peer by public key, then we'll need to
// convert that into a string for our map. Otherwise, we expect them to
// target by peer ID instead.
if nodeKey != nil {
pubKeyBytes = nodeKey.SerializeCompressed()
}
// First attempt to locate the target peer to open a channel with, if // First attempt to locate the target peer to open a channel with, if
// we're unable to locate the peer then this request will fail. // we're unable to locate the peer then this request will fail.
pubKeyBytes := req.targetPubkey.SerializeCompressed()
s.mu.RLock() s.mu.RLock()
if peer, ok := s.peersByPub[string(pubKeyBytes)]; ok { peer, ok := s.peersByPub[string(pubKeyBytes)]
targetPeer = peer if !ok {
req.err <- fmt.Errorf("peer %x is not online", pubKeyBytes)
return req.updates, req.err
} }
s.mu.RUnlock() s.mu.RUnlock()
if targetPeer == nil {
errChan <- fmt.Errorf("peer is not connected NodeKey(%x)", pubKeyBytes)
return updateChan, errChan
}
// If the fee rate wasn't specified, then we'll use a default // If the fee rate wasn't specified, then we'll use a default
// confirmation target. // confirmation target.
if fundingFeePerKw == 0 { if req.fundingFeePerKw == 0 {
estimator := s.cc.feeEstimator estimator := s.cc.feeEstimator
fundingFeePerKw, err = estimator.EstimateFeePerKW(6) feeRate, err := estimator.EstimateFeePerKW(6)
if err != nil { if err != nil {
errChan <- err req.err <- err
return updateChan, errChan return req.updates, req.err
} }
req.fundingFeePerKw = feeRate
} }
// Spawn a goroutine to send the funding workflow request to the // Spawn a goroutine to send the funding workflow request to the funding
// funding manager. This allows the server to continue handling queries // manager. This allows the server to continue handling queries instead
// instead of blocking on this request which is exported as a // of blocking on this request which is exported as a synchronous
// synchronous request to the outside world. // request to the outside world.
req := &openChanReq{ go s.fundingMgr.initFundingWorkflow(peer, req)
targetPubkey: nodeKey,
chainHash: *activeNetParams.GenesisHash,
localFundingAmt: localAmt,
fundingFeePerKw: fundingFeePerKw,
pushAmt: pushAmt,
private: private,
minHtlc: minHtlc,
remoteCsvDelay: remoteCsvDelay,
updates: updateChan,
err: errChan,
}
// TODO(roasbeef): pass in chan that's closed if/when funding succeeds return req.updates, req.err
// so can track as persistent peer?
go s.fundingMgr.initFundingWorkflow(targetPeer, req)
return updateChan, errChan
} }
// Peers returns a slice of all active peers. // Peers returns a slice of all active peers.