lnd.xprv/fundingmanager.go
Olaoluwa Osuntokun 07166fe88b
lnd: implement pendingchannels RPC
This commit implements the “pendingchannels” RPC within the rpcserver.
This RPC allows callers to receive details concerning the current
pending channels associated with the daemon. Pending channels are those
waiting for additional confirmations before they can be considered
opened/closed.

At the time of this commit, only open channels are shown. A future
commit will also add the confirmation updates, along with information
for close channels.
2016-07-07 15:33:58 -07:00

699 lines
24 KiB
Go

package main
import (
"sync"
"sync/atomic"
"github.com/lightningnetwork/lnd/lnwallet"
"github.com/lightningnetwork/lnd/lnwire"
"github.com/roasbeef/btcd/btcec"
"github.com/roasbeef/btcd/txscript"
"github.com/roasbeef/btcd/wire"
"github.com/roasbeef/btcutil"
)
const (
// TODO(roasbeef): tune
msgBufferSize = 50
)
// reservationWithCtx encapsulates a pending channel reservation. This wrapper
// struct is used internally within the funding manager to track and progress
// the funding workflow initiated by incoming/outgoing meethods from the target
// peer. Additionally, this struct houses a response and error channel which is
// used to respond to the caller in the case a channel workflow is initiated
// via a local signal such as RPC.
// TODO(roasbeef): actually use the context package
// * deadlines, etc.
type reservationWithCtx struct {
reservation *lnwallet.ChannelReservation
peer *peer
resp chan *wire.OutPoint
err chan error
}
// initFundingMsg is sent by an outside sub-system to the funding manager in
// order to kick-off a funding workflow with a specified target peer. The
// original request which defines the parameters of the funding workflow are
// embedded within this message giving the funding manager full context w.r.t
// the workflow.
type initFundingMsg struct {
peer *peer
err chan error
resp chan *wire.OutPoint
*openChanReq
}
// fundingRequestMsg couples an lnwire.SingleFundingRequest message with the
// peer who sent the message. This allows the funding manager to queue a
// response directly to the peer, progressing the funding workflow.
type fundingRequestMsg struct {
msg *lnwire.SingleFundingRequest
peer *peer
}
// fundingResponseMsg couples an lnwire.SingleFundingResponse message with the
// peer who sent the message. This allows the funding manager to queue a
// response directly to the peer, progressing the funding workflow.
type fundingResponseMsg struct {
msg *lnwire.SingleFundingResponse
peer *peer
}
// fundingCompleteMsg couples an lnwire.SingleFundingComplete message with the
// peer who sent the message. This allows the funding manager to queue a
// response directly to the peer, progressing the funding workflow.
type fundingCompleteMsg struct {
msg *lnwire.SingleFundingComplete
peer *peer
}
// fundingSignCompleteMsg couples an lnwire.SingleFundingSignComplete message
// with the peer who sent the message. This allows the funding manager to
// queue a response directly to the peer, progressing the funding workflow.
type fundingSignCompleteMsg struct {
msg *lnwire.SingleFundingSignComplete
peer *peer
}
// fundingOpenMsg couples an lnwire.SingleFundingOpenProof message
// with the peer who sent the message. This allows the funding manager to
// queue a response directly to the peer, progressing the funding workflow.
type fundingOpenMsg struct {
msg *lnwire.SingleFundingOpenProof
peer *peer
}
// pendingChannels is a map instantiated per-peer which tracks all active
// pending single funded channels indexed by their pending channel identifier.
type pendingChannels map[uint64]*reservationWithCtx
// fundingManager acts as an orchestrator/bridge between the wallet's
// 'ChannelReservation' workflow, and the wire protocl's funding initiation
// messages. Any requests to initaite the funding workflow for a channel, either
// kicked-off locally, or remotely is handled by the funding manager. Once a
// channels's funding workflow has been completed, any local callers, the local
// peer, and possibly the remote peer are notified of the completion of the
// channel workflow. Additionally, any temporary or permanent access controls
// between the wallet and remote peers are enforced via the funding manager.
type fundingManager struct {
// MUST be used atomically.
started int32
stopped int32
// channelReservations is a map which houses the state of all pending
// funding workflows.
resMtx sync.RWMutex
activeReservations map[int32]pendingChannels
// wallet is the daemon's internal Lightning enabled wallet.
wallet *lnwallet.LightningWallet
// fundingMsgs is a channel which receives wrapped wire messages
// related to funding workflow from outside peers.
fundingMsgs chan interface{}
// queries is a channel which receives requests to query the internal
// state of the funding manager.
queries chan interface{}
// fundingRequests is a channel used to recieve channel initiation
// requests from a local sub-system within the daemon.
fundingRequests chan *initFundingMsg
quit chan struct{}
wg sync.WaitGroup
}
// newFundingManager creates and initializes a new instance of the
// fundingManager.
func newFundingManager(w *lnwallet.LightningWallet) *fundingManager {
return &fundingManager{
activeReservations: make(map[int32]pendingChannels),
wallet: w,
fundingMsgs: make(chan interface{}, msgBufferSize),
fundingRequests: make(chan *initFundingMsg, msgBufferSize),
queries: make(chan interface{}, 1),
quit: make(chan struct{}),
}
}
// Start launches all helper goroutines required for handling requests sent
// to the funding manager.
func (f *fundingManager) Start() error {
if atomic.AddInt32(&f.started, 1) != 1 { // TODO(roasbeef): CAS instead
return nil
}
fndgLog.Infof("funding manager running")
f.wg.Add(1) // TODO(roasbeef): tune
go f.reservationCoordinator()
return nil
}
// Start signals all helper goroutines to execute a graceful shutdown. This
// method will block until all goroutines have exited.
func (f *fundingManager) Stop() error {
if atomic.AddInt32(&f.stopped, 1) != 1 {
return nil
}
fndgLog.Infof("funding manager shutting down")
close(f.quit)
f.wg.Wait()
return nil
}
type numPendingReq struct {
resp chan uint32
}
// NumPendingChannels returns the number of pending channels currently
// progressing through the reservation workflow.
func (f *fundingManager) NumPendingChannels() uint32 {
resp := make(chan uint32, 1)
req := &numPendingReq{resp}
f.queries <- req
return <-resp
}
type pendingChannel struct {
peerId int32
lightningID [32]byte
channelPoint *wire.OutPoint
capacity btcutil.Amount
localBalance btcutil.Amount
remoteBalance btcutil.Amount
}
type pendingChansReq struct {
resp chan []*pendingChannel
}
// PendingChannels returns a slice describing all the channels which are
// currently pending at the last state of the funding workflow.
func (f *fundingManager) PendingChannels() []*pendingChannel {
resp := make(chan []*pendingChannel, 1)
req := &pendingChansReq{resp}
f.queries <- req
return <-resp
}
// reservationCoordinator is the primary goroutine tasked with progressing the
// funding workflow between the wallet, and any outside peers or local callers.
//
// NOTE: This MUST be run as a goroutine.
func (f *fundingManager) reservationCoordinator() {
out:
for {
select {
case msg := <-f.fundingMsgs:
switch fmsg := msg.(type) {
case *fundingRequestMsg:
f.handleFundingRequest(fmsg)
case *fundingResponseMsg:
f.handleFundingResponse(fmsg)
case *fundingCompleteMsg:
f.handleFundingComplete(fmsg)
case *fundingSignCompleteMsg:
f.handleFundingSignComplete(fmsg)
case *fundingOpenMsg:
f.handleFundingOpen(fmsg)
}
case req := <-f.fundingRequests:
f.handleInitFundingMsg(req)
case req := <-f.queries:
switch msg := req.(type) {
case *numPendingReq:
f.handleNumPending(msg)
case *pendingChansReq:
f.handlePendingChannels(msg)
}
case <-f.quit:
break out
}
}
f.wg.Done()
}
// handleNumPending handles a request for the total number of pending channels.
func (f *fundingManager) handleNumPending(msg *numPendingReq) {
var numPending uint32
for _, peerChannels := range f.activeReservations {
numPending += uint32(len(peerChannels))
}
msg.resp <- numPending
}
// handlePendingChannels responds to a request for details concerning all
// currently pending channels waiting for the final phase of the funding
// workflow (funding txn confirmation).
func (f *fundingManager) handlePendingChannels(msg *pendingChansReq) {
var pendingChannels []*pendingChannel
for peerID, peerChannels := range f.activeReservations {
for _, pendingChan := range peerChannels {
peer := pendingChan.peer
res := pendingChan.reservation
localFund := res.OurContribution().FundingAmount
remoteFund := res.TheirContribution().FundingAmount
pendingChan := &pendingChannel{
peerId: peerID,
lightningID: peer.lightningID,
channelPoint: res.FundingOutpoint(),
capacity: localFund + remoteFund,
localBalance: localFund,
remoteBalance: remoteFund,
}
pendingChannels = append(pendingChannels, pendingChan)
}
}
msg.resp <- pendingChannels
}
// processFundingRequest sends a message to the fundingManager allowing it to
// intiate the new funding workflow with the source peer.
func (f *fundingManager) processFundingRequest(msg *lnwire.SingleFundingRequest, peer *peer) {
f.fundingMsgs <- &fundingRequestMsg{msg, peer}
}
// handleSingleFundingRequest creates an initial 'ChannelReservation' within
// the wallet, then responds to the source peer with a single funder response
// message progressing the funding workflow.
// TODO(roasbeef): add error chan to all, let channelManager handle
// error+propagate
func (f *fundingManager) handleFundingRequest(fmsg *fundingRequestMsg) {
msg := fmsg.msg
amt := msg.FundingAmount
delay := msg.CsvDelay
fndgLog.Infof("Recv'd fundingRequest(amt=%v, delay=%v, pendingId=%v) "+
"from peerID(%v)", amt, delay, msg.ChannelID, fmsg.peer.id)
// Attempt to initialize a reservation within the wallet. If the wallet
// has insufficient resources to create the channel, then the reservation
// attempt may be rejected. Note that since we're on the responding
// side of a single funder workflow, we don't commit any funds to the
// channel ourselves.
// TODO(roasbeef): passing num confs 1 is irrelevant here, make signed?
reservation, err := f.wallet.InitChannelReservation(amt, 0, fmsg.peer.lightningID, 1, delay)
if err != nil {
fndgLog.Errorf("Unable to initialize reservation: %v", err)
return
}
// Once the reservation has been created succesfully, we add it to this
// peers map of pending reservations to track this particular reservation
// until either abort or completion.
f.resMtx.Lock()
if _, ok := f.activeReservations[fmsg.peer.id]; !ok {
f.activeReservations[fmsg.peer.id] = make(pendingChannels)
}
f.activeReservations[fmsg.peer.id][msg.ChannelID] = &reservationWithCtx{
reservation: reservation,
peer: fmsg.peer,
}
f.resMtx.Unlock()
// With our portion of the reservation initialied, process the
// initiators contribution to the channel.
_, addrs, _, err := txscript.ExtractPkScriptAddrs(msg.DeliveryPkScript, activeNetParams)
if err != nil {
fndgLog.Errorf("Unable to extract addresses from script: %v", err)
return
}
contribution := &lnwallet.ChannelContribution{
FundingAmount: amt,
MultiSigKey: msg.ChannelDerivationPoint,
CommitKey: msg.CommitmentKey,
DeliveryAddress: addrs[0],
CsvDelay: delay,
}
if err := reservation.ProcessSingleContribution(contribution); err != nil {
fndgLog.Errorf("unable to add contribution reservation: %v", err)
return
}
fndgLog.Infof("Sending fundingResp for pendingID(%v)", msg.ChannelID)
// With the initiator's contribution recorded, response with our
// contribution in the next message of the workflow.
ourContribution := reservation.OurContribution()
deliveryScript, err := txscript.PayToAddrScript(ourContribution.DeliveryAddress)
if err != nil {
fndgLog.Errorf("unable to convert address to pkscript: %v", err)
return
}
fundingResp := lnwire.NewSingleFundingResponse(msg.ChannelID,
ourContribution.RevocationKey, ourContribution.CommitKey,
ourContribution.MultiSigKey, ourContribution.CsvDelay,
deliveryScript)
fmsg.peer.queueMsg(fundingResp, nil)
}
// processFundingRequest sends a message to the fundingManager allowing it to
// continue the second phase of a funding workflow with the target peer.
func (f *fundingManager) processFundingResponse(msg *lnwire.SingleFundingResponse, peer *peer) {
f.fundingMsgs <- &fundingResponseMsg{msg, peer}
}
// handleFundingResponse processes a response to the workflow initiation sent
// by the remote peer. This message then queues a message with the funding
// outpoint, and a commitment signature to the remote peer.
func (f *fundingManager) handleFundingResponse(fmsg *fundingResponseMsg) {
msg := fmsg.msg
sourcePeer := fmsg.peer
f.resMtx.RLock()
resCtx := f.activeReservations[fmsg.peer.id][msg.ChannelID]
f.resMtx.RUnlock()
fndgLog.Infof("Recv'd fundingResponse for pendingID(%v)", msg.ChannelID)
// The remote node has responded with their portion of the channel
// contribution. At this point, we can process their contribution which
// allows us to construct and sign both the commitment transaction, and
// the funding transaction.
_, addrs, _, err := txscript.ExtractPkScriptAddrs(msg.DeliveryPkScript, activeNetParams)
if err != nil {
fndgLog.Errorf("Unable to extract addresses from script: %v", err)
return
}
contribution := &lnwallet.ChannelContribution{
FundingAmount: 0,
MultiSigKey: msg.ChannelDerivationPoint,
CommitKey: msg.CommitmentKey,
DeliveryAddress: addrs[0],
RevocationKey: msg.RevocationKey,
CsvDelay: msg.CsvDelay,
}
if err := resCtx.reservation.ProcessContribution(contribution); err != nil {
fndgLog.Errorf("Unable to process contribution from %v: %v",
sourcePeer, err)
return
}
// TODO(roasbeef): create new chan barrier
// Now that we have their contribution, we can extract, then send over
// both the funding out point and our signature for their version of
// the commitment transaction to the remote peer.
outPoint := resCtx.reservation.FundingOutpoint()
_, sig := resCtx.reservation.OurSignatures()
commitSig, err := btcec.ParseSignature(sig, btcec.S256())
if err != nil {
fndgLog.Errorf("Unable to parse signature: %v", err)
return
}
fndgLog.Infof("Generated ChannelPoint(%v) for pendingID(%v)",
outPoint, msg.ChannelID)
revocationKey := resCtx.reservation.OurContribution().RevocationKey
fundingComplete := lnwire.NewSingleFundingComplete(msg.ChannelID,
outPoint, commitSig, revocationKey)
sourcePeer.queueMsg(fundingComplete, nil)
}
// processFundingComplete queues a funding complete message coupled with the
// source peer to the fundingManager.
func (f *fundingManager) processFundingComplete(msg *lnwire.SingleFundingComplete, peer *peer) {
f.fundingMsgs <- &fundingCompleteMsg{msg, peer}
}
// handleFundingComplete progresses the funding workflow when the daemon is on
// the responding side of a single funder workflow. Once this message has been
// processed, a signature is sent to the remote peer allowing it to broadcast
// the funding transaction, progressing the workflow into the final stage.
func (f *fundingManager) handleFundingComplete(fmsg *fundingCompleteMsg) {
f.resMtx.RLock()
resCtx := f.activeReservations[fmsg.peer.id][fmsg.msg.ChannelID]
f.resMtx.RUnlock()
// The channel initiator has responded with the funding outpoint of the
// final funding transaction, as well as a signature for our version of
// the commitment transaction. So at this point, we can validate the
// inititator's commitment transaction, then send our own if it's valid.
// TODO(roasbeef): make case (p vs P) consistent throughout
fundingOut := fmsg.msg.FundingOutPoint
chanID := fmsg.msg.ChannelID
commitSig := fmsg.msg.CommitSignature.Serialize()
fndgLog.Infof("completing pendingID(%v) with ChannelPoint(%v)",
fmsg.msg.ChannelID, fundingOut,
)
// Append a sighash type of SigHashAll to the signature as it's the
// sighash type used implicitly within this type of channel for
// commitment transactions.
commitSig = append(commitSig, byte(txscript.SigHashAll))
revokeKey := fmsg.msg.RevocationKey
if err := resCtx.reservation.CompleteReservationSingle(revokeKey, fundingOut, commitSig); err != nil {
// TODO(roasbeef): better error logging: peerID, channelID, etc.
fndgLog.Errorf("unable to complete single reservation: %v", err)
return
}
// With their signature for our version of the commitment transaction
// verified, we can now send over our signature to the remote peer.
// TODO(roasbeef): just have raw bytes in wire msg? avoids decoding
// then decoding shortly afterwards.
_, sig := resCtx.reservation.OurSignatures()
ourCommitSig, err := btcec.ParseSignature(sig, btcec.S256())
if err != nil {
fndgLog.Errorf("unable to parse signature: %v", err)
return
}
// TODO(roasbeef): create new chan barrier
fndgLog.Infof("sending signComplete for pendingID(%v) over ChannelPoint(%v)",
fmsg.msg.ChannelID, fundingOut)
signComplete := lnwire.NewSingleFundingSignComplete(chanID, ourCommitSig)
fmsg.peer.queueMsg(signComplete, nil)
}
// processFundingSignComplete sends a single funding sign complete message
// along with the source peer to the funding manager.
func (f *fundingManager) processFundingSignComplete(msg *lnwire.SingleFundingSignComplete, peer *peer) {
f.fundingMsgs <- &fundingSignCompleteMsg{msg, peer}
}
// handleFundingSignComplete processes the final message recieved in a single
// funder workflow. Once this message is processed, the funding transaction is
// broadcast. Once the funding transaction reaches a sufficient number of
// confirmations, a message is sent to the responding peer along with an SPV
// proofs of transaction inclusion.
func (f *fundingManager) handleFundingSignComplete(fmsg *fundingSignCompleteMsg) {
chanID := fmsg.msg.ChannelID
f.resMtx.RLock()
resCtx := f.activeReservations[fmsg.peer.id][chanID]
f.resMtx.RUnlock()
// The remote peer has responded with a signature for our commitment
// transaction. We'll verify the signature for validity, then commit
// the state to disk as we can now open the channel.
commitSig := append(fmsg.msg.CommitSignature.Serialize(), byte(txscript.SigHashAll))
if err := resCtx.reservation.CompleteReservation(nil, commitSig); err != nil {
fndgLog.Errorf("unable to complete reservation sign complete: %v", err)
return
}
fundingPoint := resCtx.reservation.FundingOutpoint()
fndgLog.Infof("Finalizing pendingID(%v) over ChannelPoint(%v), "+
"waiting for channel open on-chain", chanID, fundingPoint)
// Spawn a goroutine which will send the newly open channel to the
// source peer once the channel is open. A channel is considered "open"
// once it reaches a sufficient number of confirmations.
go func() {
// TODO(roasbeef): semaphore to limit active chan open goroutines
select {
// TODO(roasbeef): need to persist pending broadcast channels,
// send chan open proof during scan of blocks mined while down.
case openChan := <-resCtx.reservation.DispatchChan():
// This reservation is no longer pending as the funding
// transaction has been fully confirmed.
f.resMtx.Lock()
delete(f.activeReservations[fmsg.peer.id], chanID)
f.resMtx.Unlock()
fndgLog.Infof("ChannelPoint(%v) with peerID(%v) is now active",
fundingPoint, fmsg.peer.id)
// Now that the channel is open, we need to notifiy a
// number of parties of this event.
// First we send the newly opened channel to the source
// server peer.
fmsg.peer.newChannels <- openChan
// Next, we queue a message to notify the remote peer
// that the channel is open. We additionally provide an
// SPV proof allowing them to verify the transaction
// inclusion.
// TODO(roasbeef): obtain SPV proof from sub-system.
// * ChainNotifier constructs proof also?
spvProof := []byte("fake proof")
fundingOpen := lnwire.NewSingleFundingOpenProof(chanID, spvProof)
fmsg.peer.queueMsg(fundingOpen, nil)
// Finally, respond to the original caller (if any).
resCtx.err <- nil
resCtx.resp <- resCtx.reservation.FundingOutpoint()
return
case <-f.quit:
return
}
}()
}
// processFundingOpenProof sends a message to the fundingManager allowing it
// to process the final message recieved when the daemon is on the responding
// side of a single funder channel workflow.
func (f *fundingManager) processFundingOpenProof(msg *lnwire.SingleFundingOpenProof, peer *peer) {
f.fundingMsgs <- &fundingOpenMsg{msg, peer}
}
// handleFundingOpen processes the final message when the daemon is the
// responder to a single funder channel workflow. The SPV proofs supplied by
// the initiating node is verified, which if correct, marks the channel as open
// to the source peer.
func (f *fundingManager) handleFundingOpen(fmsg *fundingOpenMsg) {
f.resMtx.RLock()
resCtx := f.activeReservations[fmsg.peer.id][fmsg.msg.ChannelID]
f.resMtx.RUnlock()
// The channel initiator has claimed the channel is now open, so we'll
// verify the contained SPV proof for validity.
// TODO(roasbeef): send off to the spv proof verifier, in the routing
// sub-module.
// Now that we've verified the initiator's proof, we'll commit the
// channel state to disk, and notify the source peer of a newly opened
// channel.
openChan, err := resCtx.reservation.FinalizeReservation()
if err != nil {
fndgLog.Errorf("unable to finalize reservation: %v", err)
return
}
// The reservation has been completed, therefore we can stop tracking
// it within our active reservations map.
f.resMtx.Lock()
delete(f.activeReservations[fmsg.peer.id], fmsg.msg.ChannelID)
f.resMtx.Unlock()
fndgLog.Infof("FundingOpen: ChannelPoint(%v) with peerID(%v) is now open",
resCtx.reservation.FundingOutpoint, fmsg.peer.id)
fmsg.peer.newChannels <- openChan
}
// initFundingWorkflow sends a message to the funding manager instructing it
// to initiate a single funder workflow with the source peer.
// TODO(roasbeef): re-visit blocking nature..
func (f *fundingManager) initFundingWorkflow(targetPeer *peer, req *openChanReq) (*wire.OutPoint, error) {
errChan := make(chan error, 1)
respChan := make(chan *wire.OutPoint, 1)
f.fundingRequests <- &initFundingMsg{
peer: targetPeer,
resp: respChan,
err: errChan,
openChanReq: req,
}
return <-respChan, <-errChan
}
// handleInitFundingMsg creates a channel reservation within the daemon's
// wallet, then sends a funding request to the remote peer kicking off the
// funding workflow.
func (f *fundingManager) handleInitFundingMsg(msg *initFundingMsg) {
nodeID := msg.peer.lightningID
localAmt := msg.localFundingAmt
remoteAmt := msg.remoteFundingAmt
capacity := localAmt + remoteAmt
numConfs := msg.numConfs
// TODO(roasbeef): add delay
fndgLog.Infof("Initiating fundingRequest(localAmt=%v, remoteAmt=%v, "+
"capacity=%v, numConfs=%v)", localAmt, remoteAmt, capacity, numConfs)
// 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.wallet.InitChannelReservation(capacity, localAmt,
nodeID, uint16(numConfs), 4)
if err != nil {
msg.resp <- nil
msg.err <- err
return
}
// Obtain a new pending channel ID which is used to track this
// reservation throughout its lifetime.
msg.peer.pendingChannelMtx.Lock()
chanID := msg.peer.nextPendingChannelID
msg.peer.nextPendingChannelID++
msg.peer.pendingChannelMtx.Unlock()
// 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.
f.resMtx.Lock()
if _, ok := f.activeReservations[msg.peer.id]; !ok {
f.activeReservations[msg.peer.id] = make(pendingChannels)
}
f.activeReservations[msg.peer.id][chanID] = &reservationWithCtx{
reservation: reservation,
peer: msg.peer,
err: msg.err,
resp: msg.resp,
}
f.resMtx.Unlock()
// Once the reservation has been created, and indexed, queue a funding
// request to the remote peer, kicking off the funding workflow.
contribution := reservation.OurContribution()
deliveryScript, err := txscript.PayToAddrScript(contribution.DeliveryAddress)
if err != nil {
fndgLog.Errorf("Unable to convert address to pkscript: %v", err)
msg.resp <- nil
msg.err <- err
return
}
fndgLog.Infof("Starting funding workflow with for pendingID(%v)", 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
contribution.FundingAmount,
contribution.CsvDelay,
contribution.CommitKey,
contribution.MultiSigKey,
deliveryScript,
)
msg.peer.queueMsg(fundingReq, nil)
}