funding: only send know errors across wire
This commit changes the failFundingFlow to accept an error, which will only be sent to the remote the peer if it is among the ReservationErrors or ErrorCode. This is done to ensure we don't send errors that contain information we don't want to leak.
This commit is contained in:
Johan T. Halseth
parent
b3441561cf
commit
6942e1479d
@ -689,21 +689,40 @@ func (f *fundingManager) CancelPeerReservations(nodePub [33]byte) {
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}
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// failFundingFlow will fail the active funding flow with the target peer,
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// identified by its unique temporary channel ID. This method is send an error
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// to the remote peer, and also remove the reservation from our set of pending
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// reservations.
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// identified by its unique temporary channel ID. This method will send an
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// error to the remote peer, and also remove the reservation from our set of
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// pending reservations.
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//
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// TODO(roasbeef): if peer disconnects, and haven't yet broadcast funding
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// transaction, then all reservations should be cleared.
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func (f *fundingManager) failFundingFlow(peer *btcec.PublicKey,
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tempChanID [32]byte, msg []byte) {
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tempChanID [32]byte, fundingErr error) {
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// We only send the exact error if it is part of out whitelisted set of
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// errors (lnwire.ErrorCode or lnwallet.ReservationError).
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var msg lnwire.ErrorData
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switch e := fundingErr.(type) {
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// Let the actual error message be sent to the remote.
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case lnwallet.ReservationError:
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msg = lnwire.ErrorData(e.Error())
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// Send the status code.
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case lnwire.ErrorCode:
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msg = lnwire.ErrorData{byte(e)}
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// We just send a generic error.
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default:
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msg = lnwire.ErrorData("funding failed due to internal error")
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}
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errMsg := &lnwire.Error{
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ChanID: tempChanID,
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Data: msg,
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}
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fndgLog.Errorf("Failing funding flow: %v", spew.Sdump(errMsg))
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fndgLog.Errorf("Failing funding flow: %v (%v)", fundingErr,
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spew.Sdump(errMsg))
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if _, err := f.cancelReservationCtx(peer, tempChanID); err != nil {
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fndgLog.Errorf("unable to cancel reservation: %v", err)
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@ -819,8 +838,7 @@ func (f *fundingManager) handleFundingOpen(fmsg *fundingOpenMsg) {
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if len(f.activeReservations[peerIDKey]) >= cfg.MaxPendingChannels {
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f.failFundingFlow(
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fmsg.peerAddress.IdentityKey, fmsg.msg.PendingChannelID,
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lnwire.ErrorData{byte(lnwire.ErrMaxPendingChannels)},
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)
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lnwire.ErrMaxPendingChannels)
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return
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}
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@ -834,8 +852,7 @@ func (f *fundingManager) handleFundingOpen(fmsg *fundingOpenMsg) {
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}
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f.failFundingFlow(
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fmsg.peerAddress.IdentityKey, fmsg.msg.PendingChannelID,
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lnwire.ErrorData{byte(lnwire.ErrSynchronizingChain)},
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)
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lnwire.ErrSynchronizingChain)
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return
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}
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@ -844,8 +861,7 @@ func (f *fundingManager) handleFundingOpen(fmsg *fundingOpenMsg) {
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if msg.FundingAmount > maxFundingAmount {
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f.failFundingFlow(
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fmsg.peerAddress.IdentityKey, fmsg.msg.PendingChannelID,
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lnwire.ErrorData{byte(lnwire.ErrChanTooLarge)},
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)
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lnwire.ErrChanTooLarge)
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return
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}
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@ -871,7 +887,7 @@ func (f *fundingManager) handleFundingOpen(fmsg *fundingOpenMsg) {
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if err != nil {
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fndgLog.Errorf("Unable to initialize reservation: %v", err)
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f.failFundingFlow(fmsg.peerAddress.IdentityKey,
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msg.PendingChannelID, []byte(err.Error()))
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msg.PendingChannelID, err)
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return
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}
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@ -890,10 +906,9 @@ func (f *fundingManager) handleFundingOpen(fmsg *fundingOpenMsg) {
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msg.MaxValueInFlight, msg.HtlcMinimum, msg.ChannelReserve,
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)
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if err != nil {
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f.failFundingFlow(
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fmsg.peerAddress.IdentityKey, fmsg.msg.PendingChannelID,
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[]byte(fmt.Sprintf("Unacceptable channel "+
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"constraints: %v", err)),
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fndgLog.Errorf("Unaccaptable channel constraints: %v", err)
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f.failFundingFlow(fmsg.peerAddress.IdentityKey,
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fmsg.msg.PendingChannelID, err,
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)
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return
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}
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@ -951,9 +966,8 @@ func (f *fundingManager) handleFundingOpen(fmsg *fundingOpenMsg) {
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err = reservation.ProcessSingleContribution(remoteContribution)
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if err != nil {
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fndgLog.Errorf("unable to add contribution reservation: %v", err)
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// TODO(roasbeef): verify only sending sane info over
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f.failFundingFlow(fmsg.peerAddress.IdentityKey,
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msg.PendingChannelID, []byte(err.Error()))
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msg.PendingChannelID, err)
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return
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}
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@ -985,7 +999,7 @@ func (f *fundingManager) handleFundingOpen(fmsg *fundingOpenMsg) {
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if err != nil {
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fndgLog.Errorf("unable to send funding response to peer: %v", err)
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f.failFundingFlow(fmsg.peerAddress.IdentityKey,
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msg.PendingChannelID, []byte(err.Error()))
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msg.PendingChannelID, err)
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return
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}
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}
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@ -1028,11 +1042,9 @@ func (f *fundingManager) handleFundingAccept(fmsg *fundingAcceptMsg) {
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msg.MaxValueInFlight, msg.HtlcMinimum, msg.ChannelReserve,
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)
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if err != nil {
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f.failFundingFlow(
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fmsg.peerAddress.IdentityKey, fmsg.msg.PendingChannelID,
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[]byte(fmt.Sprintf("Unacceptable channel "+
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"constraints: %v", err)),
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)
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fndgLog.Warnf("Unacceptable channel constraints: %v", err)
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f.failFundingFlow(fmsg.peerAddress.IdentityKey,
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fmsg.msg.PendingChannelID, err)
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return
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}
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@ -1070,7 +1082,7 @@ func (f *fundingManager) handleFundingAccept(fmsg *fundingAcceptMsg) {
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fndgLog.Errorf("Unable to process contribution from %v: %v",
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fmsg.peerAddress.IdentityKey, err)
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f.failFundingFlow(fmsg.peerAddress.IdentityKey,
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msg.PendingChannelID, []byte(err.Error()))
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msg.PendingChannelID, err)
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resCtx.err <- err
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return
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}
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@ -1115,7 +1127,7 @@ func (f *fundingManager) handleFundingAccept(fmsg *fundingAcceptMsg) {
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if err != nil {
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fndgLog.Errorf("Unable to parse signature: %v", err)
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f.failFundingFlow(fmsg.peerAddress.IdentityKey,
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msg.PendingChannelID, []byte(err.Error()))
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msg.PendingChannelID, err)
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resCtx.err <- err
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return
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}
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@ -1123,7 +1135,7 @@ func (f *fundingManager) handleFundingAccept(fmsg *fundingAcceptMsg) {
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if err != nil {
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fndgLog.Errorf("Unable to send funding complete message: %v", err)
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f.failFundingFlow(fmsg.peerAddress.IdentityKey,
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msg.PendingChannelID, []byte(err.Error()))
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msg.PendingChannelID, err)
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resCtx.err <- err
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return
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}
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@ -1177,7 +1189,7 @@ func (f *fundingManager) handleFundingCreated(fmsg *fundingCreatedMsg) {
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// TODO(roasbeef): better error logging: peerID, channelID, etc.
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fndgLog.Errorf("unable to complete single reservation: %v", err)
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f.failFundingFlow(fmsg.peerAddress.IdentityKey,
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pendingChanID, []byte(err.Error()))
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pendingChanID, err)
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return
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}
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@ -1218,7 +1230,7 @@ func (f *fundingManager) handleFundingCreated(fmsg *fundingCreatedMsg) {
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if err != nil {
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fndgLog.Errorf("unable to parse signature: %v", err)
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f.failFundingFlow(fmsg.peerAddress.IdentityKey,
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pendingChanID, []byte(err.Error()))
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pendingChanID, err)
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deleteFromDatabase()
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return
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}
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@ -1230,7 +1242,7 @@ func (f *fundingManager) handleFundingCreated(fmsg *fundingCreatedMsg) {
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if err := f.cfg.SendToPeer(peerKey, fundingSigned); err != nil {
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fndgLog.Errorf("unable to send FundingSigned message: %v", err)
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f.failFundingFlow(fmsg.peerAddress.IdentityKey,
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pendingChanID, []byte(err.Error()))
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pendingChanID, err)
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deleteFromDatabase()
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return
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}
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@ -1332,11 +1344,12 @@ func (f *fundingManager) handleFundingSigned(fmsg *fundingSignedMsg) {
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delete(f.signedReservations, fmsg.msg.ChanID)
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f.resMtx.Unlock()
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if !ok {
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err := fmt.Sprintf("Unable to find signed reservation for "+
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err := fmt.Errorf("Unable to find signed reservation for "+
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"chan_id=%x", fmsg.msg.ChanID)
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fndgLog.Warnf(err)
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fndgLog.Warnf(err.Error())
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// TODO: add ErrChanNotFound?
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f.failFundingFlow(fmsg.peerAddress.IdentityKey,
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pendingChanID, []byte(err))
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pendingChanID, err)
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return
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}
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@ -1346,8 +1359,9 @@ func (f *fundingManager) handleFundingSigned(fmsg *fundingSignedMsg) {
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if err != nil {
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fndgLog.Warnf("Unable to find reservation (peerID:%v, chanID:%x)",
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peerKey, pendingChanID[:])
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// TODO: add ErrChanNotFound?
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f.failFundingFlow(fmsg.peerAddress.IdentityKey,
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pendingChanID, []byte(err.Error()))
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pendingChanID, err)
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return
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}
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@ -1369,7 +1383,7 @@ func (f *fundingManager) handleFundingSigned(fmsg *fundingSignedMsg) {
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fndgLog.Errorf("Unable to complete reservation sign complete: %v", err)
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resCtx.err <- err
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f.failFundingFlow(fmsg.peerAddress.IdentityKey,
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pendingChanID, []byte(err.Error()))
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pendingChanID, err)
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return
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}
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