lnwire: replace ChannelPoint with ChannelID, use new PendingChanID

lnwallet/channel.go

@@ -1804,7 +1804,7 @@ func (lc *LightningChannel) RevokeCurrentCommitment() (*lnwire.RevokeAndAck, err
 	// ACK'd index within the log to right at this set of pending changes.
 	lc.remoteUpdateLog.ackTransition()
 
-	revocationMsg.ChannelPoint = *lc.channelState.ChanID
+	revocationMsg.ChanID = lnwire.NewChanIDFromOutPoint(lc.channelState.ChanID)
 	return revocationMsg, nil
 }
 
@@ -1954,7 +1954,7 @@ func (lc *LightningChannel) ExtendRevocationWindow() (*lnwire.RevokeAndAck, erro
 	// InitialRevocationWindow
 
 	revMsg := &lnwire.RevokeAndAck{}
-	revMsg.ChannelPoint = *lc.channelState.ChanID
+	revMsg.ChanID = lnwire.NewChanIDFromOutPoint(lc.channelState.ChanID)
 
 	nextHeight := lc.revocationWindowEdge + 1
 	revocation, err := lc.channelState.RevocationProducer.AtIndex(nextHeight)

lnwire/announcement_signatures.go

@@ -4,7 +4,6 @@ import (
 	"io"
 
 	"github.com/roasbeef/btcd/btcec"
-	"github.com/roasbeef/btcd/wire"
 )
 
 // AnnounceSignatures this is a direct message between two endpoints of a
@@ -16,7 +15,7 @@ type AnnounceSignatures struct {
 	// Channel id is better for users and debugging and short channel id is
 	// used for quick test on existence of the particular utxo inside the
 	// block chain, because it contains information about block.
-	ChannelID wire.OutPoint
+	ChannelID ChannelID
 
 	// ShortChannelID is the unique description of the funding
 	// transaction. It is constructed with the most significant 3 bytes

lnwire/channel_announcement_test.go

@@ -13,7 +13,7 @@ func TestChannelAnnoucementEncodeDecode(t *testing.T) {
 	ca := &ChannelAnnouncement{
 		NodeSig1:       someSig,
 		NodeSig2:       someSig,
-		ShortChannelID: someChannelID,
+		ShortChannelID: someShortChannelID,
 		BitcoinSig1:    someSig,
 		BitcoinSig2:    someSig,
 		NodeID1:        pubKey,
@@ -65,7 +65,7 @@ func TestChannelAnnoucementValidation(t *testing.T) {
 	secondBitcoinSig, _ := secondBitcoinPrivKey.Sign(hash)
 
 	ca := &ChannelAnnouncement{
-		ShortChannelID: someChannelID,
+		ShortChannelID: someShortChannelID,
 		BitcoinSig1:    firstBitcoinSig,
 		BitcoinSig2:    secondBitcoinSig,
 		NodeID1:        firstNodePubKey,

lnwire/channel_update_announcement_test.go

@@ -9,7 +9,7 @@ import (
 func TestChannelUpdateAnnouncementEncodeDecode(t *testing.T) {
 	cua := &ChannelUpdateAnnouncement{
 		Signature:                 someSig,
-		ShortChannelID:            someChannelID,
+		ShortChannelID:            someShortChannelID,
 		Timestamp:                 maxUint32,
 		Flags:                     maxUint16,
 		TimeLockDelta:             maxUint16,

lnwire/close_request.go

@@ -4,7 +4,6 @@ import (
 	"fmt"
 
 	"github.com/roasbeef/btcd/btcec"
-	"github.com/roasbeef/btcd/wire"
 	"github.com/roasbeef/btcutil"
 
 	"io"
@@ -21,8 +20,8 @@ import (
 // both sides are able to arrive at an identical closure transaction as they
 // know the order of the inputs/outputs.
 type CloseRequest struct {
-	// ChannelPoint serves to identify which channel is to be closed.
-	ChannelPoint wire.OutPoint
+	// ChanID serves to identify which channel is to be closed.
+	ChanID ChannelID
 
 	// RequesterCloseSig is the signature of the requester for the fully
 	// assembled closing transaction.
@@ -36,10 +35,10 @@ type CloseRequest struct {
 }
 
 // NewCloseRequest creates a new CloseRequest.
-func NewCloseRequest(cp wire.OutPoint, sig *btcec.Signature) *CloseRequest {
+func NewCloseRequest(cid ChannelID, sig *btcec.Signature) *CloseRequest {
 	// TODO(roasbeef): update once fees aren't hardcoded
 	return &CloseRequest{
-		ChannelPoint:      cp,
+		ChanID:            cid,
 		RequesterCloseSig: sig,
 	}
 }
@@ -53,12 +52,8 @@ var _ Message = (*CloseRequest)(nil)
 //
 // This is part of the lnwire.Message interface.
 func (c *CloseRequest) Decode(r io.Reader, pver uint32) error {
-	// ChannelPoint (8)
-	// RequesterCloseSig (73)
-	// 	First byte length then sig
-	// Fee (8)
 	return readElements(r,
-		&c.ChannelPoint,
+		&c.ChanID,
 		&c.RequesterCloseSig,
 		&c.Fee)
 }
@@ -68,11 +63,8 @@ func (c *CloseRequest) Decode(r io.Reader, pver uint32) error {
 //
 // This is part of the lnwire.Message interface.
 func (c *CloseRequest) Encode(w io.Writer, pver uint32) error {
-	// ChannelID
-	// RequesterCloseSig
-	// Fee
 	return writeElements(w,
-		c.ChannelPoint,
+		c.ChanID,
 		c.RequesterCloseSig,
 		c.Fee)
 }

lnwire/commit_sig.go

@@ -4,7 +4,6 @@ import (
 	"io"
 
 	"github.com/roasbeef/btcd/btcec"
-	"github.com/roasbeef/btcd/wire"
 )
 
 // CommitSig is sent by either side to stage any pending HTLC's in the
@@ -15,9 +14,9 @@ import (
 // order to batch add several HTLC's with a single signature covering all
 // implicitly accepted HTLC's.
 type CommitSig struct {
-	// ChannelPoint uniquely identifies to which currently active channel
-	// this CommitSig applies to.
-	ChannelPoint wire.OutPoint
+	// ChanID uniquely identifies to which currently active channel this
+	// CommitSig applies to.
+	ChanID ChannelID
 
 	// CommitSig is Alice's signature for Bob's new commitment transaction.
 	// Alice is able to send this signature without requesting any
@@ -44,10 +43,8 @@ var _ Message = (*CommitSig)(nil)
 //
 // This is part of the lnwire.Message interface.
 func (c *CommitSig) Decode(r io.Reader, pver uint32) error {
-	// ChannelPoint(8)
-	// RequesterCommitSig(73max+2)
 	return readElements(r,
-		&c.ChannelPoint,
+		&c.ChanID,
 		&c.CommitSig,
 	)
 }
@@ -58,7 +55,7 @@ func (c *CommitSig) Decode(r io.Reader, pver uint32) error {
 // This is part of the lnwire.Message interface.
 func (c *CommitSig) Encode(w io.Writer, pver uint32) error {
 	return writeElements(w,
-		c.ChannelPoint,
+		c.ChanID,
 		c.CommitSig,
 	)
 }
@@ -76,8 +73,8 @@ func (c *CommitSig) Command() uint32 {
 //
 // This is part of the lnwire.Message interface.
 func (c *CommitSig) MaxPayloadLength(uint32) uint32 {
-	// 36 + 73
-	return 109
+	// 32 + 64
+	return 96
 }
 
 // Validate performs any necessary sanity checks to ensure all fields present

lnwire/commit_sig_test.go

@@ -8,8 +8,8 @@ import (
 
 func TestCommitSigEncodeDecode(t *testing.T) {
 	commitSignature := &CommitSig{
-		ChannelPoint: *outpoint1,
-		CommitSig:    commitSig,
+		ChanID:    ChannelID(revHash),
+		CommitSig: commitSig,
 	}
 
 	// Next encode the CS message into an empty bytes buffer.

lnwire/funding_locked.go

@@ -5,53 +5,44 @@ import (
 	"io"
 
 	"github.com/roasbeef/btcd/btcec"
-	"github.com/roasbeef/btcd/wire"
 )
 
 // FundingLocked is the message that both parties to a new channel creation
-// send once they have observed the funding transaction being confirmed on
-// the blockchain. FundingLocked contains the signatures necessary for the
-// channel participants to advertise the existence of the channel to the
-// rest of the network.
+// send once they have observed the funding transaction being confirmed on the
+// blockchain. FundingLocked contains the signatures necessary for the channel
+// participants to advertise the existence of the channel to the rest of the
+// network.
 type FundingLocked struct {
-	// ChannelOutpoint is the outpoint of the channel's funding
-	// transaction. This can be used to query for the channel in the
-	// database.
-	ChannelOutpoint wire.OutPoint
+	// ChanID is the outpoint of the channel's funding transaction. This
+	// can be used to query for the channel in the database.
+	ChanID ChannelID
 
-	// ChannelId serves to uniquely identify the channel created by the
-	// current channel funding workflow.
-	ChannelID ShortChannelID
-
-	// NextPerCommitmentPoint is the secret that can be used to revoke
-	// the next commitment transaction for the channel.
+	// NextPerCommitmentPoint is the secret that can be used to revoke the
+	// next commitment transaction for the channel.
 	NextPerCommitmentPoint *btcec.PublicKey
 }
 
-// NewFundingLocked creates a new FundingLocked message, populating it with
-// the necessary IDs and revocation secret..
-func NewFundingLocked(op wire.OutPoint, cid ShortChannelID,
-	npcp *btcec.PublicKey) *FundingLocked {
+// NewFundingLocked creates a new FundingLocked message, populating it with the
+// necessary IDs and revocation secret.
+func NewFundingLocked(cid ChannelID, npcp *btcec.PublicKey) *FundingLocked {
 	return &FundingLocked{
-		ChannelOutpoint:        op,
-		ChannelID:              cid,
+		ChanID:                 cid,
 		NextPerCommitmentPoint: npcp,
 	}
 }
 
-// A compile time check to ensure FundingLocked implements the
-// lnwire.Message interface.
+// A compile time check to ensure FundingLocked implements the lnwire.Message
+// interface.
 var _ Message = (*FundingLocked)(nil)
 
-// Decode deserializes the serialized FundingLocked message stored in the passed
-// io.Reader into the target FundingLocked using the deserialization
+// Decode deserializes the serialized FundingLocked message stored in the
+// passed io.Reader into the target FundingLocked using the deserialization
 // rules defined by the passed protocol version.
 //
 // This is part of the lnwire.Message interface.
 func (c *FundingLocked) Decode(r io.Reader, pver uint32) error {
 	return readElements(r,
-		&c.ChannelOutpoint,
-		&c.ChannelID,
+		&c.ChanID,
 		&c.NextPerCommitmentPoint)
 }
 
@@ -62,8 +53,7 @@ func (c *FundingLocked) Decode(r io.Reader, pver uint32) error {
 // This is part of the lnwire.Message interface.
 func (c *FundingLocked) Encode(w io.Writer, pver uint32) error {
 	return writeElements(w,
-		c.ChannelOutpoint,
-		c.ChannelID,
+		c.ChanID,
 		c.NextPerCommitmentPoint)
 }
 
@@ -83,15 +73,13 @@ func (c *FundingLocked) Command() uint32 {
 func (c *FundingLocked) MaxPayloadLength(uint32) uint32 {
 	var length uint32
 
-	// ChannelOutpoint - 36 bytes
-	length += 36
-
-	// ChannelID - 8 bytes
-	length += 8
+	// ChanID - 32 bytes
+	length += 32
 
 	// NextPerCommitmentPoint - 33 bytes
 	length += 33
 
+	// 65 bytes
 	return length
 }
 

lnwire/funding_locked_test.go

@@ -8,7 +8,7 @@ import (
 
 func TestFundingLockedWire(t *testing.T) {
 	// First create a new FundingLocked message.
-	fl := NewFundingLocked(*outpoint1, someChannelID, pubKey)
+	fl := NewFundingLocked(ChannelID(revHash), pubKey)
 
 	// Next encode the FundingLocked message into an empty bytes buffer.
 	var b bytes.Buffer

lnwire/lnwire.go

@@ -250,26 +250,29 @@ func writeElement(w io.Writer, element interface{}) error {
 		}
 
 	case wire.OutPoint:
-		// TODO(roasbeef): consolidate with above
-		// First write out the previous txid.
 		var h [32]byte
 		copy(h[:], e.Hash[:])
 		if _, err := w.Write(h[:]); err != nil {
 			return err
 		}
 
-		// Then the exact index of this output.
-		var idx [4]byte
-		binary.BigEndian.PutUint32(idx[:], e.Index)
+		var idx [2]byte
+		binary.BigEndian.PutUint16(idx[:], uint16(e.Index))
 		if _, err := w.Write(idx[:]); err != nil {
 			return err
 		}
-		// TODO(roasbeef): *MsgTx
+
 	case int64, float64:
 		err := binary.Write(w, binary.BigEndian, e)
 		if err != nil {
 			return err
 		}
+
+	case ChannelID:
+		if _, err := w.Write(e[:]); err != nil {
+			return err
+		}
+
 	case ShortChannelID:
 		// Check that field fit in 3 bytes and write the blockHeight
 		if e.BlockHeight > ((1 << 24) - 1) {
@@ -573,7 +576,6 @@ func readElement(r io.Reader, element interface{}) error {
 		(*e).PreviousOutPoint.Index = binary.BigEndian.Uint32(idxBytes[:])
 		return nil
 	case *wire.OutPoint:
-		// TODO(roasbeef): consolidate with above
 		var h [32]byte
 		if _, err = io.ReadFull(r, h[:]); err != nil {
 			return err
@@ -582,20 +584,29 @@ func readElement(r io.Reader, element interface{}) error {
 		if err != nil {
 			return err
 		}
-		// Index
-		var idxBytes [4]byte
+
+		var idxBytes [2]byte
 		_, err = io.ReadFull(r, idxBytes[:])
 		if err != nil {
 			return err
 		}
-		index := binary.BigEndian.Uint32(idxBytes[:])
+		index := binary.BigEndian.Uint16(idxBytes[:])
 
-		*e = wire.OutPoint{Hash: *hash, Index: index}
+		*e = wire.OutPoint{
+			Hash:  *hash,
+			Index: uint32(index),
+		}
 	case *int64, *float64:
 		err := binary.Read(r, binary.BigEndian, e)
 		if err != nil {
 			return err
 		}
+
+	case *ChannelID:
+		if _, err := io.ReadFull(r, e[:]); err != nil {
+			return err
+		}
+
 	case *ShortChannelID:
 		var blockHeight [4]byte
 		if _, err = io.ReadFull(r, blockHeight[1:]); err != nil {

lnwire/lnwire_test.go

@@ -64,7 +64,7 @@ var (
 	maxUint24 uint32 = (1 << 24) - 1
 	maxUint16 uint16 = (1 << 16) - 1
 
-	someChannelID = ShortChannelID{
+	someShortChannelID = ShortChannelID{
 		BlockHeight: maxUint24,
 		TxIndex:     maxUint24,
 		TxPosition:  maxUint16,

lnwire/revoke_and_ack.go

@@ -4,7 +4,6 @@ import (
 	"io"
 
 	"github.com/roasbeef/btcd/btcec"
-	"github.com/roasbeef/btcd/wire"
 )
 
 // RevokeAndAck is sent by either side once a CommitSig message has been
@@ -17,9 +16,9 @@ import (
 // Alice to send the next CommitSig message modifying Bob's commitment
 // transaction without first asking for a revocation hash initially.
 type RevokeAndAck struct {
-	// ChannelPoint uniquely identifies to which currently active channel
-	// this RevokeAndAck applies to.
-	ChannelPoint wire.OutPoint
+	// ChanID uniquely identifies to which currently active channel this
+	// RevokeAndAck applies to.
+	ChanID ChannelID
 
 	// Revocation is the preimage to the revocation hash of the now prior
 	// commitment transaction.
@@ -58,12 +57,8 @@ var _ Message = (*RevokeAndAck)(nil)
 //
 // This is part of the lnwire.Message interface.
 func (c *RevokeAndAck) Decode(r io.Reader, pver uint32) error {
-	// ChannelPoint (8)
-	// Revocation (32)
-	// NextRevocationKey (33)
-	// NextRevocationHash (32)
 	return readElements(r,
-		&c.ChannelPoint,
+		&c.ChanID,
 		c.Revocation[:],
 		&c.NextRevocationKey,
 		c.NextRevocationHash[:],
@@ -76,7 +71,7 @@ func (c *RevokeAndAck) Decode(r io.Reader, pver uint32) error {
 // This is part of the lnwire.Message interface.
 func (c *RevokeAndAck) Encode(w io.Writer, pver uint32) error {
 	return writeElements(w,
-		c.ChannelPoint,
+		c.ChanID,
 		c.Revocation[:],
 		c.NextRevocationKey,
 		c.NextRevocationHash[:],
@@ -96,8 +91,8 @@ func (c *RevokeAndAck) Command() uint32 {
 //
 // This is part of the lnwire.Message interface.
 func (c *RevokeAndAck) MaxPayloadLength(uint32) uint32 {
-	// 36 + 32 + 33 + 32
-	return 133
+	// 32 + 32 + 33 + 32
+	return 129
 }
 
 // Validate performs any necessary sanity checks to ensure all fields present

lnwire/revoke_and_ack_test.go

@@ -8,7 +8,7 @@ import (
 
 func TestRevokeAndAckEncodeDecode(t *testing.T) {
 	cr := &RevokeAndAck{
-		ChannelPoint:       *outpoint1,
+		ChanID:             ChannelID(revHash),
 		Revocation:         revHash,
 		NextRevocationKey:  pubKey,
 		NextRevocationHash: revHash,

lnwire/single_funding_complete.go

@@ -15,10 +15,9 @@ import (
 // required for him to generate a signature for Alice's version of the
 // commitment transaction.
 type SingleFundingComplete struct {
-	// ChannelID serves to uniquely identify the future channel created by
-	// the initiated single funder workflow.
-	// TODO(roasbeef): change all to PendingChannelID, document schema
-	ChannelID uint64
+	// PendingChannelID serves to uniquely identify the future channel
+	// created by the initiated single funder workflow.
+	PendingChannelID [32]byte
 
 	// FundingOutPoint is the outpoint (txid:index) of the funding
 	// transaction. With this value, Bob will be able to generate a
@@ -46,12 +45,12 @@ type SingleFundingComplete struct {
 
 // NewSingleFundingComplete creates, and returns a new empty
 // SingleFundingResponse.
-func NewSingleFundingComplete(chanID uint64, fundingPoint wire.OutPoint,
+func NewSingleFundingComplete(pChanID [32]byte, fundingPoint wire.OutPoint,
 	commitSig *btcec.Signature, revokeKey *btcec.PublicKey,
 	obsfucator [6]byte) *SingleFundingComplete {
 
 	return &SingleFundingComplete{
-		ChannelID:           chanID,
+		PendingChannelID:    pChanID,
 		FundingOutPoint:     fundingPoint,
 		CommitSignature:     commitSig,
 		RevocationKey:       revokeKey,
@@ -65,12 +64,8 @@ func NewSingleFundingComplete(chanID uint64, fundingPoint wire.OutPoint,
 //
 // This is part of the lnwire.Message interface.
 func (s *SingleFundingComplete) Decode(r io.Reader, pver uint32) error {
-	// ChannelID (8)
-	// FundingOutPoint (36)
-	// CommitmentSignature (73)
-	// RevocationKey (33)
 	return readElements(r,
-		&s.ChannelID,
+		s.PendingChannelID[:],
 		&s.FundingOutPoint,
 		&s.CommitSignature,
 		&s.RevocationKey,
@@ -83,12 +78,8 @@ func (s *SingleFundingComplete) Decode(r io.Reader, pver uint32) error {
 //
 // This is part of the lnwire.Message interface.
 func (s *SingleFundingComplete) Encode(w io.Writer, pver uint32) error {
-	// ChannelID (8)
-	// FundingOutPoint (36)
-	// Commitment Signature (73)
-	// RevocationKey (33)
 	return writeElements(w,
-		s.ChannelID,
+		s.PendingChannelID[:],
 		s.FundingOutPoint,
 		s.CommitSignature,
 		s.RevocationKey,
@@ -105,12 +96,12 @@ func (s *SingleFundingComplete) Command() uint32 {
 
 // MaxPayloadLength returns the maximum allowed payload length for a
 // SingleFundingComplete. This is calculated by summing the max length of all
-// the fields within a SingleFundingComplete. Therefore, the final breakdown
-// is: 8 + 36 + 33 + 73 + 4 = 154
+// the fields within a SingleFundingComplete.
 //
 // This is part of the lnwire.Message interface.
 func (s *SingleFundingComplete) MaxPayloadLength(uint32) uint32 {
-	return 154
+	// 32 + 36 + 64 + 33 + 6
+	return 171
 }
 
 // Validate examines each populated field within the SingleFundingComplete for

lnwire/single_funding_complete_test.go

@@ -11,7 +11,7 @@ func TestSingleFundingCompleteWire(t *testing.T) {
 	copy(obsfucator[:], bytes.Repeat([]byte("k"), 6))
 
 	// First create a new SFC message.
-	sfc := NewSingleFundingComplete(22, *outpoint1, commitSig1, pubKey,
+	sfc := NewSingleFundingComplete(revHash, *outpoint1, commitSig1, pubKey,
 		obsfucator)
 
 	// Next encode the SFC message into an empty bytes buffer.

lnwire/single_funding_request.go

@@ -20,9 +20,9 @@ import (
 // to provide the responder with an SPV proof of funding transaction inclusion
 // after a sufficient number of confirmations.
 type SingleFundingRequest struct {
-	// ChannelID serves to uniquely identify the future channel created by
-	// the initiated single funder workflow.
-	ChannelID uint64
+	// PendingChannelID serves to uniquely identify the future channel
+	// created by the initiated single funder workflow.
+	PendingChannelID [32]byte
 
 	// ChannelType represents the type of channel this request would like
 	// to open. At this point, the only supported channels are type 0
@@ -84,14 +84,14 @@ type SingleFundingRequest struct {
 }
 
 // NewSingleFundingRequest creates, and returns a new empty SingleFundingRequest.
-func NewSingleFundingRequest(chanID uint64, chanType uint8, coinType uint64,
+func NewSingleFundingRequest(chanID [32]byte, chanType uint8, coinType uint64,
 	fee btcutil.Amount, amt btcutil.Amount, delay uint32, ck,
 	cdp *btcec.PublicKey, deliveryScript PkScript,
 	dustLimit btcutil.Amount, pushSat btcutil.Amount,
 	confDepth uint32) *SingleFundingRequest {
 
 	return &SingleFundingRequest{
-		ChannelID:              chanID,
+		PendingChannelID:       chanID,
 		ChannelType:            chanType,
 		CoinType:               coinType,
 		FeePerKb:               fee,
@@ -113,7 +113,7 @@ func NewSingleFundingRequest(chanID uint64, chanType uint8, coinType uint64,
 // This is part of the lnwire.Message interface.
 func (c *SingleFundingRequest) Decode(r io.Reader, pver uint32) error {
 	return readElements(r,
-		&c.ChannelID,
+		c.PendingChannelID[:],
 		&c.ChannelType,
 		&c.CoinType,
 		&c.FeePerKb,
@@ -134,7 +134,7 @@ func (c *SingleFundingRequest) Decode(r io.Reader, pver uint32) error {
 // This is part of the lnwire.Message interface.
 func (c *SingleFundingRequest) Encode(w io.Writer, pver uint32) error {
 	return writeElements(w,
-		c.ChannelID,
+		c.PendingChannelID[:],
 		c.ChannelType,
 		c.CoinType,
 		c.FeePerKb,
@@ -165,8 +165,8 @@ func (c *SingleFundingRequest) Command() uint32 {
 func (c *SingleFundingRequest) MaxPayloadLength(uint32) uint32 {
 	var length uint32
 
-	// ChannelID - 8 bytes
-	length += 8
+	// PendingChannelID - 32 bytes
+	length += 32
 
 	// ChannelType - 1 byte
 	length++
@@ -224,17 +224,6 @@ func (c *SingleFundingRequest) Validate() error {
 			" CSV delay")
 	}
 
-	// The channel derivation point must be non-nil, and have an odd
-	// y-coordinate.
-	if c.ChannelDerivationPoint == nil {
-		return fmt.Errorf("the channel derivation point must be " +
-			"non-nil")
-	}
-	//if c.ChannelDerivationPoint.Y.Bit(0) != 1 {
-	//return fmt.Errorf("The channel derivation point must have an odd " +
-	//"y-coordinate")
-	//}
-
 	// The delivery pkScript must be amongst the supported script
 	// templates.
 	if !isValidPkScript(c.DeliveryPkScript) {

lnwire/single_funding_request_test.go

@@ -10,7 +10,7 @@ func TestSingleFundingRequestWire(t *testing.T) {
 	// First create a new SFR message.
 	cdp := pubKey
 	delivery := PkScript(bytes.Repeat([]byte{0x02}, 25))
-	sfr := NewSingleFundingRequest(20, 21, 22, 23, 5, 5, cdp, cdp,
+	sfr := NewSingleFundingRequest(revHash, 21, 22, 23, 5, 5, cdp, cdp,
 		delivery, 540, 10000, 6)
 
 	// Next encode the SFR message into an empty bytes buffer.

lnwire/single_funding_response.go

@@ -10,12 +10,12 @@ import (
 
 // SingleFundingResponse is the message Bob sends to Alice after she initiates
 // the single funder channel workflow via a SingleFundingRequest message. Once
-// Alice receives Bob's reponse, then she has all the items neccessary to
+// Alice receives Bob's response, then she has all the items necessary to
 // construct the funding transaction, and both commitment transactions.
 type SingleFundingResponse struct {
-	// ChannelID serves to uniquely identify the future channel created by
-	// the initiated single funder workflow.
-	ChannelID uint64
+	// PendingChannelID serves to uniquely identify the future channel
+	// created by the initiated single funder workflow.
+	PendingChannelID [32]byte
 
 	// ChannelDerivationPoint is an secp256k1 point which will be used to
 	// derive the public key the responder will use for the half of the
@@ -60,12 +60,12 @@ type SingleFundingResponse struct {
 
 // NewSingleFundingResponse creates, and returns a new empty
 // SingleFundingResponse.
-func NewSingleFundingResponse(chanID uint64, rk, ck, cdp *btcec.PublicKey,
+func NewSingleFundingResponse(chanID [32]byte, rk, ck, cdp *btcec.PublicKey,
 	delay uint32, deliveryScript PkScript,
 	dustLimit btcutil.Amount, confDepth uint32) *SingleFundingResponse {
 
 	return &SingleFundingResponse{
-		ChannelID:              chanID,
+		PendingChannelID:       chanID,
 		ChannelDerivationPoint: cdp,
 		CommitmentKey:          ck,
 		RevocationKey:          rk,
@@ -86,16 +86,8 @@ var _ Message = (*SingleFundingResponse)(nil)
 //
 // This is part of the lnwire.Message interface.
 func (c *SingleFundingResponse) Decode(r io.Reader, pver uint32) error {
-	// ChannelID (8)
-	// ChannelDerivationPoint (33)
-	// CommitmentKey (33)
-	// RevocationKey (33)
-	// CsvDelay (4)
-	// DeliveryPkScript (final delivery)
-	// DustLimit (8)
-	// ConfirmationDepth (4)
 	return readElements(r,
-		&c.ChannelID,
+		c.PendingChannelID[:],
 		&c.ChannelDerivationPoint,
 		&c.CommitmentKey,
 		&c.RevocationKey,
@@ -112,7 +104,7 @@ func (c *SingleFundingResponse) Decode(r io.Reader, pver uint32) error {
 // This is part of the lnwire.Message interface.
 func (c *SingleFundingResponse) Encode(w io.Writer, pver uint32) error {
 	return writeElements(w,
-		c.ChannelID,
+		c.PendingChannelID[:],
 		c.ChannelDerivationPoint,
 		c.CommitmentKey,
 		c.RevocationKey,
@@ -139,8 +131,8 @@ func (c *SingleFundingResponse) Command() uint32 {
 func (c *SingleFundingResponse) MaxPayloadLength(uint32) uint32 {
 	var length uint32
 
-	// ChannelID - 8 bytes
-	length += 8
+	// PendingChannelID - 32 bytes
+	length += 32
 
 	// ChannelDerivationPoint - 33 bytes
 	length += 33
@@ -177,10 +169,6 @@ func (c *SingleFundingResponse) Validate() error {
 	if c.ChannelDerivationPoint == nil {
 		return fmt.Errorf("The channel derivation point must be non-nil")
 	}
-	//if c.ChannelDerivationPoint.Y.Bit(0) != 1 {
-	//	return fmt.Errorf("The channel derivation point must have an odd " +
-	//		"y-coordinate")
-	//}
 
 	// The delivery pkScript must be amongst the supported script
 	// templates.

lnwire/single_funding_response_test.go

@@ -9,7 +9,7 @@ import (
 func TestSingleFundingResponseWire(t *testing.T) {
 	// First create a new SFR message.
 	delivery := PkScript(bytes.Repeat([]byte{0x02}, 25))
-	sfr := NewSingleFundingResponse(22, pubKey, pubKey, pubKey, 5,
+	sfr := NewSingleFundingResponse(revHash, pubKey, pubKey, pubKey, 5,
 		delivery, 540, 4)
 
 	// Next encode the SFR message into an empty bytes buffer.

lnwire/single_funding_signcomplete.go

@@ -12,9 +12,9 @@ import (
 // message is received and processed by Alice, she is free to broadcast the
 // funding transaction.
 type SingleFundingSignComplete struct {
-	// ChannelID serves to uniquely identify the future channel created by
-	// the initiated single funder workflow.
-	ChannelID uint64
+	// PendingChannelID serves to uniquely identify the future channel
+	// created by the initiated single funder workflow.
+	PendingChannelID [32]byte
 
 	// CommitSignature is Bobs's signature for Alice's version of the
 	// commitment transaction.
@@ -23,12 +23,12 @@ type SingleFundingSignComplete struct {
 
 // NewSingleFundingSignComplete creates a new empty SingleFundingSignComplete
 // message.
-func NewSingleFundingSignComplete(chanID uint64,
+func NewSingleFundingSignComplete(chanID [32]byte,
 	sig *btcec.Signature) *SingleFundingSignComplete {
 
 	return &SingleFundingSignComplete{
-		ChannelID:       chanID,
-		CommitSignature: sig,
+		PendingChannelID: chanID,
+		CommitSignature:  sig,
 	}
 }
 
@@ -38,10 +38,8 @@ func NewSingleFundingSignComplete(chanID uint64,
 //
 // This is part of the lnwire.Message interface.
 func (c *SingleFundingSignComplete) Decode(r io.Reader, pver uint32) error {
-	// ChannelID (8)
-	// CommitmentSignature (73)
 	return readElements(r,
-		&c.ChannelID,
+		c.PendingChannelID[:],
 		&c.CommitSignature)
 }
 
@@ -52,7 +50,7 @@ func (c *SingleFundingSignComplete) Decode(r io.Reader, pver uint32) error {
 // This is part of the lnwire.Message interface.
 func (c *SingleFundingSignComplete) Encode(w io.Writer, pver uint32) error {
 	return writeElements(w,
-		c.ChannelID,
+		c.PendingChannelID[:],
 		c.CommitSignature)
 }
 
@@ -65,13 +63,13 @@ func (c *SingleFundingSignComplete) Command() uint32 {
 }
 
 // MaxPayloadLength returns the maximum allowed payload length for a
-// SingleFundingSignComplete. This is calculated by summing the max length of all
-// the fields within a SingleFundingSignComplete. The final breakdown
-// is: 8 + 73 = 81
+// SingleFundingSignComplete. This is calculated by summing the max length of
+// all the fields within a SingleFundingSignComplete.
 //
 // This is part of the lnwire.Message interface.
 func (c *SingleFundingSignComplete) MaxPayloadLength(uint32) uint32 {
-	return 81
+	// 32 + 64
+	return 96
 }
 
 // Validate examines each populated field within the SingleFundingSignComplete

lnwire/single_funding_signcomplete_test.go

@@ -12,7 +12,7 @@ import (
 func TestSingleFundingSignCompleteWire(t *testing.T) {
 	// First create a new SFSC message.
 	sfsc := NewSingleFundingSignComplete(
-		22,
+		revHash,
 		&btcec.Signature{
 			R: new(big.Int).SetInt64(9),
 			S: new(big.Int).SetInt64(11),

lnwire/update_add_htlc.go

@@ -4,7 +4,6 @@ import (
 	"fmt"
 	"io"
 
-	"github.com/roasbeef/btcd/wire"
 	"github.com/roasbeef/btcutil"
 )
 
@@ -20,9 +19,9 @@ const OnionPacketSize = 1254
 // CommitSig message will move the pending HTLC to the newly created commitment
 // transaction, marking them as "staged".
 type UpdateAddHTLC struct {
-	// ChannelPoint is the particular active channel that this
+	// ChanID is the particular active channel that this
 	// UpdateAddHTLC is binded to.
-	ChannelPoint wire.OutPoint
+	ChanID ChannelID
 
 	// ID is the identification server for this HTLC. This value is
 	// explicitly included as it allows nodes to survive single-sided
@@ -70,14 +69,8 @@ var _ Message = (*UpdateAddHTLC)(nil)
 //
 // This is part of the lnwire.Message interface.
 func (c *UpdateAddHTLC) Decode(r io.Reader, pver uint32) error {
-	// ChannelPoint(8)
-	// ID(4)
-	// Expiry(4)
-	// Amount(8)
-	// PaymentHash(32)
-	// OnionBlob(1254)
 	return readElements(r,
-		&c.ChannelPoint,
+		&c.ChanID,
 		&c.ID,
 		&c.Expiry,
 		&c.Amount,
@@ -92,7 +85,7 @@ func (c *UpdateAddHTLC) Decode(r io.Reader, pver uint32) error {
 // This is part of the lnwire.Message interface.
 func (c *UpdateAddHTLC) Encode(w io.Writer, pver uint32) error {
 	return writeElements(w,
-		c.ChannelPoint,
+		c.ChanID,
 		c.ID,
 		c.Expiry,
 		c.Amount,
@@ -114,8 +107,8 @@ func (c *UpdateAddHTLC) Command() uint32 {
 //
 // This is part of the lnwire.Message interface.
 func (c *UpdateAddHTLC) MaxPayloadLength(uint32) uint32 {
-	// 1342
-	return 36 + 8 + 4 + 8 + 32 + 1254
+	// 1338
+	return 32 + 8 + 4 + 8 + 32 + 1254
 }
 
 // Validate performs any necessary sanity checks to ensure all fields present
@@ -128,6 +121,7 @@ func (c *UpdateAddHTLC) Validate() error {
 		// negative payments. Maybe for some wallets, but not this one!
 		return fmt.Errorf("amount paid cannot be negative")
 	}
+
 	// We're good!
 	return nil
 }

lnwire/update_add_htlc_test.go

@@ -11,11 +11,11 @@ import (
 func TestUpdateAddHTLCEncodeDecode(t *testing.T) {
 	// First create a new UPAH message.
 	addReq := &UpdateAddHTLC{
-		ChannelPoint: *outpoint1,
-		ID:           99,
-		Expiry:       uint32(144),
-		Amount:       btcutil.Amount(123456000),
-		PaymentHash:  revHash,
+		ChanID:      ChannelID(revHash),
+		ID:          99,
+		Expiry:      uint32(144),
+		Amount:      btcutil.Amount(123456000),
+		PaymentHash: revHash,
 	}
 	copy(addReq.OnionBlob[:], bytes.Repeat([]byte{23}, OnionPacketSize))
 

lnwire/update_fail_htlc.go

@@ -1,10 +1,6 @@
 package lnwire
 
-import (
-	"io"
-
-	"github.com/roasbeef/btcd/wire"
-)
+import "io"
 
 // FailCode specifies the precise reason that an upstream HTLC was cancelled.
 // Each UpdateFailHTLC message carries a FailCode which is to be passed back
@@ -82,8 +78,8 @@ type OpaqueReason []byte
 // the route to fully undo the HTLC.
 type UpdateFailHTLC struct {
 	// ChannelPoint is the particular active channel that this
-	// UpdateFailHTLC is binded to.
-	ChannelPoint wire.OutPoint
+	// UpdateFailHTLC is bound to.
+	ChanID ChannelID
 
 	// ID references which HTLC on the remote node's commitment transaction
 	// has timed out.
@@ -105,11 +101,8 @@ var _ Message = (*UpdateFailHTLC)(nil)
 //
 // This is part of the lnwire.Message interface.
 func (c *UpdateFailHTLC) Decode(r io.Reader, pver uint32) error {
-	// ChannelPoint(8)
-	// HTLCKey(8)
-	// Reason(??)
 	return readElements(r,
-		&c.ChannelPoint,
+		&c.ChanID,
 		&c.ID,
 		&c.Reason,
 	)
@@ -121,7 +114,7 @@ func (c *UpdateFailHTLC) Decode(r io.Reader, pver uint32) error {
 // This is part of the lnwire.Message interface.
 func (c *UpdateFailHTLC) Encode(w io.Writer, pver uint32) error {
 	return writeElements(w,
-		c.ChannelPoint,
+		c.ChanID,
 		c.ID,
 		c.Reason,
 	)
@@ -140,8 +133,8 @@ func (c *UpdateFailHTLC) Command() uint32 {
 //
 // This is part of the lnwire.Message interface.
 func (c *UpdateFailHTLC) MaxPayloadLength(uint32) uint32 {
-	// 36 + 8 + 154
-	return 198
+	// 32 +  8  + 154
+	return 194
 }
 
 // Validate performs any necessary sanity checks to ensure all fields present

lnwire/update_fail_htlc_test.go

@@ -9,8 +9,8 @@ import (
 func TestUpdateFailHTLC(t *testing.T) {
 	// First create a new UFH message.
 	cancelMsg := &UpdateFailHTLC{
-		ChannelPoint: *outpoint1,
-		ID:           22,
+		ChanID: ChannelID(revHash),
+		ID:     22,
 	}
 	cancelMsg.Reason = []byte{byte(UnknownDestination)}
 

lnwire/update_fulfill_htlc.go

@@ -1,10 +1,6 @@
 package lnwire
 
-import (
-	"io"
-
-	"github.com/roasbeef/btcd/wire"
-)
+import "io"
 
 // UpdateFufillHTLC is sent by Alice to Bob when she wishes to settle a
 // particular HTLC referenced by its HTLCKey within a specific active channel
@@ -12,9 +8,9 @@ import (
 // Alice to "lock-in" the removal of the specified HTLC, possible containing a
 // batch signature covering several settled HTLC's.
 type UpdateFufillHTLC struct {
-	// ChannelPoint references an active channel which holds the HTLC to be
+	// ChanID references an active channel which holds the HTLC to be
 	// settled.
-	ChannelPoint wire.OutPoint
+	ChanID ChannelID
 
 	// ID denotes the exact HTLC stage within the receiving node's
 	// commitment transaction to be removed.
@@ -26,11 +22,11 @@ type UpdateFufillHTLC struct {
 }
 
 // NewUpdateFufillHTLC returns a new empty UpdateFufillHTLC.
-func NewUpdateFufillHTLC(chanPoint wire.OutPoint, id uint64,
+func NewUpdateFufillHTLC(chanID ChannelID, id uint64,
 	preimage [32]byte) *UpdateFufillHTLC {
 
 	return &UpdateFufillHTLC{
-		ChannelPoint:    chanPoint,
+		ChanID:          chanID,
 		ID:              id,
 		PaymentPreimage: preimage,
 	}
@@ -45,11 +41,8 @@ var _ Message = (*UpdateFufillHTLC)(nil)
 //
 // This is part of the lnwire.Message interface.
 func (c *UpdateFufillHTLC) Decode(r io.Reader, pver uint32) error {
-	// ChannelPoint(8)
-	// ID(8)
-	// PaymentPreimage(32)
 	return readElements(r,
-		&c.ChannelPoint,
+		&c.ChanID,
 		&c.ID,
 		c.PaymentPreimage[:],
 	)
@@ -61,7 +54,7 @@ func (c *UpdateFufillHTLC) Decode(r io.Reader, pver uint32) error {
 // This is part of the lnwire.Message interface.
 func (c *UpdateFufillHTLC) Encode(w io.Writer, pver uint32) error {
 	return writeElements(w,
-		c.ChannelPoint,
+		c.ChanID,
 		c.ID,
 		c.PaymentPreimage[:],
 	)
@@ -80,8 +73,8 @@ func (c *UpdateFufillHTLC) Command() uint32 {
 //
 // This is part of the lnwire.Message interface.
 func (c *UpdateFufillHTLC) MaxPayloadLength(uint32) uint32 {
-	// 36 + 8 + (32 * 15)
-	return 524
+	// 32 + 8 + 32
+	return 72
 }
 
 // Validate performs any necessary sanity checks to ensure all fields present

lnwire/update_fulfill_htlc_test.go

@@ -8,7 +8,7 @@ import (
 
 func TestUpdateFufillHTLCEncodeDecode(t *testing.T) {
 	// First create a new HTLCSR message.
-	settleReq := NewUpdateFufillHTLC(*outpoint1, 23, revHash)
+	settleReq := NewUpdateFufillHTLC(ChannelID(revHash), 23, revHash)
 
 	// Next encode the HTLCSR message into an empty bytes buffer.
 	var b bytes.Buffer