multi: use witnessScript everywhere instead of redeemScript

This commit consists of a mass variable renaming to call the pkScript being executed for segwit outputs the `witnessScript` instead of `redeemScript`. The latter naming convention is generally considered to be reserved for the context of BIP 16 execution. With segwit to be deployed soon, we should be using the correct terminology uniformly through the codebase. 

In addition some minor typos throughout the codebase has been fixed.

channeldb/channel.go

@@ -127,7 +127,7 @@ type OpenChannel struct {
 
 	OurMultiSigKey      *btcec.PublicKey
 	TheirMultiSigKey    *btcec.PublicKey
-	FundingRedeemScript []byte
+	FundingWitnessScript []byte
 
 	// In blocks
 	LocalCsvDelay  uint32
@@ -1095,7 +1095,7 @@ func putChanFundingInfo(nodeChanBucket *bolt.Bucket, channel *OpenChannel) error
 		return err
 	}
 
-	if err := wire.WriteVarBytes(&b, 0, channel.FundingRedeemScript[:]); err != nil {
+	if err := wire.WriteVarBytes(&b, 0, channel.FundingWitnessScript[:]); err != nil {
 		return err
 	}
 
@@ -1151,7 +1151,7 @@ func fetchChanFundingInfo(nodeChanBucket *bolt.Bucket, channel *OpenChannel) err
 		return err
 	}
 
-	channel.FundingRedeemScript, err = wire.ReadVarBytes(infoBytes, 0, 520, "")
+	channel.FundingWitnessScript, err = wire.ReadVarBytes(infoBytes, 0, 520, "")
 	if err != nil {
 		return err
 	}

channeldb/channel_test.go

@@ -148,7 +148,7 @@ func createTestChannelState(cdb *DB) (*OpenChannel, error) {
 		FundingOutpoint:            testOutpoint,
 		OurMultiSigKey:             privKey.PubKey(),
 		TheirMultiSigKey:           privKey.PubKey(),
-		FundingRedeemScript:        script,
+		FundingWitnessScript:        script,
 		TheirCurrentRevocation:     privKey.PubKey(),
 		TheirCurrentRevocationHash: key,
 		OurDeliveryScript:          script,
@@ -257,7 +257,7 @@ func TestOpenChannelPutGetDelete(t *testing.T) {
 		newState.TheirMultiSigKey.SerializeCompressed()) {
 		t.Fatalf("their multisig key doesn't match")
 	}
-	if !bytes.Equal(state.FundingRedeemScript, newState.FundingRedeemScript) {
+	if !bytes.Equal(state.FundingWitnessScript, newState.FundingWitnessScript) {
 		t.Fatalf("redeem script doesn't match")
 	}
 

lnwallet/btcwallet/btcwallet.go

@@ -57,7 +57,7 @@ type BtcWallet struct {
 var _ lnwallet.WalletController = (*BtcWallet)(nil)
 
 // New returns a new fully initialized instance of BtcWallet given a valid
-// confirguration struct.
+// configuration struct.
 func New(cfg *Config) (*BtcWallet, error) {
 	// Ensure the wallet exists or create it when the create flag is set.
 	netDir := networkDir(cfg.DataDir, cfg.NetParams)

lnwallet/btcwallet/signer.go

@@ -96,7 +96,7 @@ func (b *BtcWallet) fetchPrivKey(pub *btcec.PublicKey) (*btcec.PrivateKey, error
 //
 // This is a part of the WalletController interface.
 func (b *BtcWallet) SignOutputRaw(tx *wire.MsgTx, signDesc *lnwallet.SignDescriptor) ([]byte, error) {
-	redeemScript := signDesc.RedeemScript
+	witnessScript := signDesc.WitnessScript
 
 	privKey, err := b.fetchPrivKey(signDesc.PubKey)
 	if err != nil {
@@ -105,7 +105,7 @@ func (b *BtcWallet) SignOutputRaw(tx *wire.MsgTx, signDesc *lnwallet.SignDescrip
 
 	amt := signDesc.Output.Value
 	sig, err := txscript.RawTxInWitnessSignature(tx, signDesc.SigHashes, 0,
-		amt, redeemScript, txscript.SigHashAll, privKey)
+		amt, witnessScript, txscript.SigHashAll, privKey)
 	if err != nil {
 		return nil, err
 	}

lnwallet/channel.go

@@ -385,7 +385,7 @@ type LightningChannel struct {
 	LocalDeliveryScript  []byte
 	RemoteDeliveryScript []byte
 
-	FundingRedeemScript []byte
+	FundingWitnessScript []byte
 	fundingTxIn         *wire.TxIn
 	fundingP2WSH        []byte
 
@@ -432,7 +432,7 @@ func NewLightningChannel(signer Signer, bio BlockChainIO,
 		Capacity:              state.Capacity,
 		LocalDeliveryScript:   state.OurDeliveryScript,
 		RemoteDeliveryScript:  state.TheirDeliveryScript,
-		FundingRedeemScript:   state.FundingRedeemScript,
+		FundingWitnessScript:   state.FundingWitnessScript,
 		ForceCloseSignal:      make(chan struct{}),
 		UnilateralCloseSignal: make(chan struct{}),
 	}
@@ -460,7 +460,7 @@ func NewLightningChannel(signer Signer, bio BlockChainIO,
 	// Create the sign descriptor which we'll be using very frequently to
 	// request a signature for the 2-of-2 multi-sig from the signer in
 	// order to complete channel state transitions.
-	fundingPkScript, err := witnessScriptHash(state.FundingRedeemScript)
+	fundingPkScript, err := witnessScriptHash(state.FundingWitnessScript)
 	if err != nil {
 		return nil, err
 	}
@@ -468,7 +468,7 @@ func NewLightningChannel(signer Signer, bio BlockChainIO,
 	lc.fundingP2WSH = fundingPkScript
 	lc.signDesc = &SignDescriptor{
 		PubKey:       lc.channelState.OurMultiSigKey,
-		RedeemScript: lc.channelState.FundingRedeemScript,
+		WitnessScript: lc.channelState.FundingWitnessScript,
 		Output: &wire.TxOut{
 			PkScript: lc.fundingP2WSH,
 			Value:    int64(lc.channelState.Capacity),
@@ -955,7 +955,7 @@ func (lc *LightningChannel) ReceiveNewCommitment(rawSig []byte,
 	// Construct the sighash of the commitment transaction corresponding to
 	// this newly proposed state update.
 	localCommitTx := localCommitmentView.txn
-	multiSigScript := lc.channelState.FundingRedeemScript
+	multiSigScript := lc.channelState.FundingWitnessScript
 	hashCache := txscript.NewTxSigHashes(localCommitTx)
 	sigHash, err := txscript.CalcWitnessSigHash(multiSigScript, hashCache,
 		txscript.SigHashAll, localCommitTx, 0, int64(lc.channelState.Capacity))
@@ -1485,7 +1485,7 @@ func (lc *LightningChannel) ForceClose() (*ForceCloseSummary, error) {
 	// required to spend from the multi-sig output.
 	ourKey := lc.channelState.OurMultiSigKey.SerializeCompressed()
 	theirKey := lc.channelState.TheirMultiSigKey.SerializeCompressed()
-	witness := SpendMultiSig(lc.FundingRedeemScript, ourKey, ourSig,
+	witness := SpendMultiSig(lc.FundingWitnessScript, ourKey, ourSig,
 		theirKey, theirSig)
 	commitTx.TxIn[0].Witness = witness
 
@@ -1529,7 +1529,7 @@ func (lc *LightningChannel) ForceClose() (*ForceCloseSummary, error) {
 	// set as the caller will decide these values once sweeping the output.
 	selfSignDesc := &SignDescriptor{
 		PubKey:       selfKey,
-		RedeemScript: selfScript,
+		WitnessScript: selfScript,
 		Output: &wire.TxOut{
 			PkScript: delayScript,
 			Value:    int64(lc.channelState.OurBalance),
@@ -1643,7 +1643,7 @@ func (lc *LightningChannel) CompleteCooperativeClose(remoteSig []byte) (*wire.Ms
 	ourKey := lc.channelState.OurMultiSigKey.SerializeCompressed()
 	theirKey := lc.channelState.TheirMultiSigKey.SerializeCompressed()
 	ourSig := append(closeSig, byte(txscript.SigHashAll))
-	witness := SpendMultiSig(lc.signDesc.RedeemScript, ourKey, ourSig,
+	witness := SpendMultiSig(lc.signDesc.WitnessScript, ourKey, ourSig,
 		theirKey, remoteSig)
 	closeTx.TxIn[0].Witness = witness
 

lnwallet/channel_test.go

@@ -58,11 +58,11 @@ type mockSigner struct {
 
 func (m *mockSigner) SignOutputRaw(tx *wire.MsgTx, signDesc *SignDescriptor) ([]byte, error) {
 	amt := signDesc.Output.Value
-	redeemScript := signDesc.RedeemScript
+	witnessScript := signDesc.WitnessScript
 	privKey := m.key
 
 	sig, err := txscript.RawTxInWitnessSignature(tx, signDesc.SigHashes,
-		signDesc.InputIndex, amt, redeemScript, txscript.SigHashAll, privKey)
+		signDesc.InputIndex, amt, witnessScript, txscript.SigHashAll, privKey)
 	if err != nil {
 		return nil, err
 	}
@@ -179,7 +179,7 @@ func createTestChannels(revocationWindow int) (*LightningChannel, *LightningChan
 	csvTimeoutAlice := uint32(5)
 	csvTimeoutBob := uint32(4)
 
-	redeemScript, _, err := GenFundingPkScript(aliceKeyPub.SerializeCompressed(),
+	witnessScript, _, err := GenFundingPkScript(aliceKeyPub.SerializeCompressed(),
 		bobKeyPub.SerializeCompressed(), int64(channelCapacity))
 	if err != nil {
 		return nil, nil, nil, err
@@ -240,7 +240,7 @@ func createTestChannels(revocationWindow int) (*LightningChannel, *LightningChan
 		FundingOutpoint:        prevOut,
 		OurMultiSigKey:         aliceKeyPub,
 		TheirMultiSigKey:       bobKeyPub,
-		FundingRedeemScript:    redeemScript,
+		FundingWitnessScript:    witnessScript,
 		LocalCsvDelay:          csvTimeoutAlice,
 		RemoteCsvDelay:         csvTimeoutBob,
 		TheirCurrentRevocation: bobRevokeKey,
@@ -260,7 +260,7 @@ func createTestChannels(revocationWindow int) (*LightningChannel, *LightningChan
 		FundingOutpoint:        prevOut,
 		OurMultiSigKey:         bobKeyPub,
 		TheirMultiSigKey:       aliceKeyPub,
-		FundingRedeemScript:    redeemScript,
+		FundingWitnessScript:    witnessScript,
 		LocalCsvDelay:          csvTimeoutBob,
 		RemoteCsvDelay:         csvTimeoutAlice,
 		TheirCurrentRevocation: aliceRevokeKey,

lnwallet/interface.go

@@ -210,19 +210,19 @@ type BlockChainIO interface {
 	GetTransaction(txid *wire.ShaHash) (*wire.MsgTx, error)
 }
 
-// SignDescriptor houses the necessary information required to succesfully sign
+// SignDescriptor houses the necessary information required to successfully sign
 // a given output. This struct is used by the Signer interface in order to gain
-// access to critial data needed to generate a valid signature.
+// access to critical data needed to generate a valid signature.
 type SignDescriptor struct {
 	// Pubkey is the public key to which the signature should be generated
 	// over. The Signer should then generate a signature with the private
 	// key corresponding to this public key.
 	PubKey *btcec.PublicKey
 
-	// RedeemScript is the full script required to properly redeem the
+	// WitnessScript is the full script required to properly redeem the
 	// output. This field will only be populated if a p2wsh or a p2sh
 	// output is being signed.
-	RedeemScript []byte
+	WitnessScript []byte
 
 	// Output is the target output which should be signed. The PkScript and
 	// Value fields within the output should be properly populated,

lnwallet/interface_test.go

@@ -481,14 +481,14 @@ func testDualFundingReservationWorkflow(miner *rpctest.Harness, wallet *lnwallet
 	chanInfo := lnc.StateSnapshot()
 
 	// Obtain bob's signature for the closure transaction.
-	redeemScript := lnc.FundingRedeemScript
+	witnessScript := lnc.FundingWitnessScript
 	fundingOut := lnc.ChannelPoint()
 	fundingTxIn := wire.NewTxIn(fundingOut, nil, nil)
 	bobCloseTx := lnwallet.CreateCooperativeCloseTx(fundingTxIn,
 		chanInfo.RemoteBalance, chanInfo.LocalBalance,
 		lnc.RemoteDeliveryScript, lnc.LocalDeliveryScript,
 		false)
-	bobSig, err := bobNode.signCommitTx(bobCloseTx, redeemScript, int64(lnc.Capacity))
+	bobSig, err := bobNode.signCommitTx(bobCloseTx, witnessScript, int64(lnc.Capacity))
 	if err != nil {
 		t.Fatalf("unable to generate bob's signature for closing tx: %v", err)
 	}
@@ -497,7 +497,7 @@ func testDualFundingReservationWorkflow(miner *rpctest.Harness, wallet *lnwallet
 	// be accepted, and found in the next mined block.
 	ourKey := chanReservation.OurContribution().MultiSigKey.SerializeCompressed()
 	theirKey := chanReservation.TheirContribution().MultiSigKey.SerializeCompressed()
-	witness := lnwallet.SpendMultiSig(redeemScript, ourKey, aliceCloseSig,
+	witness := lnwallet.SpendMultiSig(witnessScript, ourKey, aliceCloseSig,
 		theirKey, bobSig)
 	bobCloseTx.TxIn[0].Witness = witness
 	if err := wallet.PublishTransaction(bobCloseTx); err != nil {

lnwallet/reservation.go

@@ -24,7 +24,7 @@ type ChannelContribution struct {
 	Inputs []*wire.TxIn
 
 	// ChangeOutputs are the Outputs to be used in the case that the total
-	// value of the fund ing inputs is greater than the total potential
+	// value of the funding inputs is greater than the total potential
 	// channel capacity.
 	ChangeOutputs []*wire.TxOut
 
@@ -52,28 +52,29 @@ type ChannelContribution struct {
 
 // InputScripts represents any script inputs required to redeem a previous
 // output. This struct is used rather than just a witness, or scripSig in
-// order to accomdate nested p2sh which utilizes both types of input scripts.
+// order to accommodate nested p2sh which utilizes both types of input scripts.
 type InputScript struct {
 	Witness   [][]byte
 	ScriptSig []byte
 }
 
 // ChannelReservation represents an intent to open a lightning payment channel
-// a counterpaty. The funding proceses from reservation to channel opening is a
+// a counterparty. The funding processes from reservation to channel opening
-// 3-step process. In order to allow for full concurrency during the reservation
+// is a 3-step process. In order to allow for full concurrency during the
-// workflow, resources consumed by a contribution are "locked" themselves. This
+// reservation workflow, resources consumed by a contribution are "locked"
-// prevents a number of race conditions such as two funding transactions
+// themselves. This prevents a number of race conditions such as two funding
-// double-spending the same input. A reservation can also be cancelled, which
+// transactions double-spending the same input. A reservation can also be
-// removes the resources from limbo, allowing another reservation to claim them.
+// cancelled, which removes the resources from limbo, allowing another
+// reservation to claim them.
 //
 // The reservation workflow consists of the following three steps:
 //  1. lnwallet.InitChannelReservation
-//     * One requests the wallet to allocate the neccessary resources for a
+//     * One requests the wallet to allocate the necessary resources for a
 //      channel reservation. These resources a put in limbo for the lifetime
 //      of a reservation.
 //    * Once completed the reservation will have the wallet's contribution
 //      accessible via the .OurContribution() method. This contribution
-//      contains the neccessary items to allow the remote party to build both
+//      contains the necessary items to allow the remote party to build both
 //      the funding, and commitment transactions.
 //  2. ChannelReservation.ProcessContribution/ChannelReservation.ProcessSingleContribution
 //     * The counterparty presents their contribution to the payment channel.
@@ -84,7 +85,7 @@ type InputScript struct {
 //     * All signatures crafted by us, are now available via .OurSignatures().
 //  3. ChannelReservation.CompleteReservation/ChannelReservation.CompleteReservationSingle
 //     * The final step in the workflow. The counterparty presents the
-//       signatures for all their inputs to the funding transation, as well
+//       signatures for all their inputs to the funding transaction, as well
 //       as a signature to our version of the commitment transaction.
 //     * We then verify the validity of all signatures before considering the
 //       channel "open".
@@ -328,7 +329,7 @@ func (r *ChannelReservation) FinalFundingTx() *wire.MsgTx {
 func (r *ChannelReservation) FundingRedeemScript() []byte {
 	r.RLock()
 	defer r.RUnlock()
-	return r.partialState.FundingRedeemScript
+	return r.partialState.FundingWitnessScript
 }
 
 // LocalCommitTx returns the commitment transaction for the local node involved

lnwallet/script_utils.go

@@ -25,11 +25,11 @@ var (
 
 // witnessScriptHash generates a pay-to-witness-script-hash public key script
 // paying to a version 0 witness program paying to the passed redeem script.
-func witnessScriptHash(redeemScript []byte) ([]byte, error) {
+func witnessScriptHash(witnessScript []byte) ([]byte, error) {
 	bldr := txscript.NewScriptBuilder()
 
 	bldr.AddOp(txscript.OP_0)
-	scriptHash := fastsha256.Sum256(redeemScript)
+	scriptHash := fastsha256.Sum256(witnessScript)
 	bldr.AddData(scriptHash[:])
 	return bldr.Script()
 }
@@ -68,33 +68,33 @@ func GenFundingPkScript(aPub, bPub []byte, amt int64) ([]byte, *wire.TxOut, erro
 	}
 
 	// First, create the 2-of-2 multi-sig script itself.
-	redeemScript, err := genMultiSigScript(aPub, bPub)
+	witnessScript, err := genMultiSigScript(aPub, bPub)
 	if err != nil {
 		return nil, nil, err
 	}
 
 	// With the 2-of-2 script in had, generate a p2wsh script which pays
 	// to the funding script.
-	pkScript, err := witnessScriptHash(redeemScript)
+	pkScript, err := witnessScriptHash(witnessScript)
 	if err != nil {
 		return nil, nil, err
 	}
 
-	return redeemScript, wire.NewTxOut(amt, pkScript), nil
+	return witnessScript, wire.NewTxOut(amt, pkScript), nil
 }
 
 // SpendMultiSig generates the witness stack required to redeem the 2-of-2 p2wsh
 // multi-sig output.
-func SpendMultiSig(redeemScript, pubA, sigA, pubB, sigB []byte) [][]byte {
+func SpendMultiSig(witnessScript, pubA, sigA, pubB, sigB []byte) [][]byte {
 	witness := make([][]byte, 4)
 
 	// When spending a p2wsh multi-sig script, rather than an OP_0, we add
 	// a nil stack element to eat the extra pop.
 	witness[0] = nil
 
-	// When initially generating the redeemScript, we sorted the serialized
+	// When initially generating the witnessScript, we sorted the serialized
 	// public keys in descending order. So we do a quick comparison in order
-	// ensure the signatures appear on the Script Virual Machine stack in
+	// ensure the signatures appear on the Script Virtual Machine stack in
 	// the correct order.
 	if bytes.Compare(pubA, pubB) == -1 {
 		witness[1] = sigB
@@ -105,7 +105,7 @@ func SpendMultiSig(redeemScript, pubA, sigA, pubB, sigB []byte) [][]byte {
 	}
 
 	// Finally, add the pre-image as the last witness element.
-	witness[3] = redeemScript
+	witness[3] = witnessScript
 
 	return witness
 }
@@ -556,7 +556,7 @@ func commitScriptToSelf(csvTimeout uint32, selfKey, revokeKey *btcec.PublicKey)
 	// signature with the revocation public key. The revocation public key
 	// will *only* be known to the other party if we have divulged the
 	// revocation hash, allowing them to homomorphically derive the proper
-	// private key which coresponds to the revoke public key.
+	// private key which corresponds to the revoke public key.
 	builder := txscript.NewScriptBuilder()
 
 	builder.AddOp(txscript.OP_IF)
@@ -621,7 +621,7 @@ func CommitSpendTimeout(signer Signer, signDesc *SignDescriptor,
 	witnessStack := wire.TxWitness(make([][]byte, 3))
 	witnessStack[0] = append(sweepSig, byte(txscript.SigHashAll))
 	witnessStack[1] = []byte{0}
-	witnessStack[2] = signDesc.RedeemScript
+	witnessStack[2] = signDesc.WitnessScript
 
 	return witnessStack, nil
 }

lnwallet/script_utils_test.go

@@ -16,13 +16,13 @@ import (
 // the commitment transaction.
 //
 // The following spending cases are covered by this test:
-//   * Alice's spend from the delayed output on her commitment transaciton.
+//   * Alice's spend from the delayed output on her commitment transaction.
 //   * Bob's spend from Alice's delayed output when she broadcasts a revoked
 //     commitment transaction.
 //   * Bob's spend from his unencumbered output within Alice's commitment
 //     transaction.
 func TestCommitmentSpendValidation(t *testing.T) {
-	// We generate a fake output, and the coresponding txin. This output
+	// We generate a fake output, and the corresponding txin. This output
 	// doesn't need to exist, as we'll only be validating spending from the
 	// transaction that references this.
 	fundingOut := &wire.OutPoint{
@@ -82,7 +82,7 @@ func TestCommitmentSpendValidation(t *testing.T) {
 	}
 	sweepTx.TxIn[0].Sequence = lockTimeToSequence(false, csvTimeout)
 	signDesc := &SignDescriptor{
-		RedeemScript: delayScript,
+		WitnessScript: delayScript,
 		SigHashes:    txscript.NewTxSigHashes(sweepTx),
 		Output: &wire.TxOut{
 			Value: int64(channelBalance),

lnwallet/wallet.go

@@ -660,15 +660,15 @@ func (l *LightningWallet) handleContributionMsg(req *addContributionMsg) {
 	// Finally, add the 2-of-2 multi-sig output which will set up the lightning
 	// channel.
 	channelCapacity := int64(pendingReservation.partialState.Capacity)
-	redeemScript, multiSigOut, err := GenFundingPkScript(ourKey.SerializeCompressed(),
+	witnessScript, multiSigOut, err := GenFundingPkScript(ourKey.SerializeCompressed(),
 		theirKey.SerializeCompressed(), channelCapacity)
 	if err != nil {
 		req.err <- err
 		return
 	}
-	pendingReservation.partialState.FundingRedeemScript = redeemScript
+	pendingReservation.partialState.FundingWitnessScript = witnessScript
 
-	// Sort the transaction. Since both side agree to a cannonical
+	// Sort the transaction. Since both side agree to a canonical
 	// ordering, by sorting we no longer need to send the entire
 	// transaction. Only signatures will be exchanged.
 	fundingTx.AddTxOut(multiSigOut)
@@ -708,7 +708,7 @@ func (l *LightningWallet) handleContributionMsg(req *addContributionMsg) {
 	}
 
 	// Locate the index of the multi-sig outpoint in order to record it
-	// since the outputs are cannonically sorted. If this is a single funder
+	// since the outputs are canonically sorted. If this is a single funder
 	// workflow, then we'll also need to send this to the remote node.
 	fundingTxID := fundingTx.TxSha()
 	_, multiSigIndex := FindScriptOutputIndex(fundingTx, multiSigOut.PkScript)
@@ -792,7 +792,7 @@ func (l *LightningWallet) handleContributionMsg(req *addContributionMsg) {
 	// Generate a signature for their version of the initial commitment
 	// transaction.
 	signDesc = SignDescriptor{
-		RedeemScript: redeemScript,
+		WitnessScript: witnessScript,
 		PubKey:       ourKey,
 		Output:       multiSigOut,
 		HashType:     txscript.SigHashAll,
@@ -837,13 +837,13 @@ func (l *LightningWallet) handleSingleContribution(req *addSingleContributionMsg
 	ourKey := pendingReservation.partialState.OurMultiSigKey
 	theirKey := theirContribution.MultiSigKey
 	channelCapacity := int64(pendingReservation.partialState.Capacity)
-	redeemScript, _, err := GenFundingPkScript(ourKey.SerializeCompressed(),
+	witnessScript, _, err := GenFundingPkScript(ourKey.SerializeCompressed(),
 		theirKey.SerializeCompressed(), channelCapacity)
 	if err != nil {
 		req.err <- err
 		return
 	}
-	pendingReservation.partialState.FundingRedeemScript = redeemScript
+	pendingReservation.partialState.FundingWitnessScript = witnessScript
 
 	masterElkremRoot, err := l.deriveMasterElkremRoot()
 	if err != nil {
@@ -888,7 +888,7 @@ func (l *LightningWallet) handleSingleContribution(req *addSingleContributionMsg
 }
 
 // handleFundingCounterPartySigs is the final step in the channel reservation
-// workflow. During this setp, we validate *all* the received signatures for
+// workflow. During this step, we validate *all* the received signatures for
 // inputs to the funding transaction. If any of these are invalid, we bail,
 // and forcibly cancel this funding request. Additionally, we ensure that the
 // signature we received from the counterparty for our version of the commitment
@@ -953,17 +953,17 @@ func (l *LightningWallet) handleFundingCounterPartySigs(msg *addCounterPartySigs
 	commitTx := pendingReservation.partialState.OurCommitTx
 	theirKey := pendingReservation.theirContribution.MultiSigKey
 
-	// Re-generate both the redeemScript and p2sh output. We sign the
+	// Re-generate both the witnessScript and p2sh output. We sign the
-	// redeemScript script, but include the p2sh output as the subscript
+	// witnessScript script, but include the p2sh output as the subscript
 	// for verification.
-	redeemScript := pendingReservation.partialState.FundingRedeemScript
+	witnessScript := pendingReservation.partialState.FundingWitnessScript
 
 	// Next, create the spending scriptSig, and then verify that the script
 	// is complete, allowing us to spend from the funding transaction.
 	theirCommitSig := msg.theirCommitmentSig
 	channelValue := int64(pendingReservation.partialState.Capacity)
 	hashCache := txscript.NewTxSigHashes(commitTx)
-	sigHash, err := txscript.CalcWitnessSigHash(redeemScript, hashCache,
+	sigHash, err := txscript.CalcWitnessSigHash(witnessScript, hashCache,
 		txscript.SigHashAll, commitTx, 0, channelValue)
 	if err != nil {
 		msg.err <- fmt.Errorf("counterparty's commitment signature is invalid: %v", err)
@@ -1066,13 +1066,13 @@ func (l *LightningWallet) handleSingleFunderSigs(req *addSingleFunderSigsMsg) {
 	pendingReservation.partialState.OurCommitTx = ourCommitTx
 	txsort.InPlaceSort(theirCommitTx)
 
-	redeemScript := pendingReservation.partialState.FundingRedeemScript
+	witnessScript := pendingReservation.partialState.FundingWitnessScript
 	channelValue := int64(pendingReservation.partialState.Capacity)
 	hashCache := txscript.NewTxSigHashes(ourCommitTx)
 	theirKey := pendingReservation.theirContribution.MultiSigKey
 	ourKey := pendingReservation.partialState.OurMultiSigKey
 
-	sigHash, err := txscript.CalcWitnessSigHash(redeemScript, hashCache,
+	sigHash, err := txscript.CalcWitnessSigHash(witnessScript, hashCache,
 		txscript.SigHashAll, ourCommitTx, 0, channelValue)
 	if err != nil {
 		req.err <- err
@@ -1094,13 +1094,13 @@ func (l *LightningWallet) handleSingleFunderSigs(req *addSingleFunderSigsMsg) {
 	// With their signature for our version of the commitment transactions
 	// verified, we can now generate a signature for their version,
 	// allowing the funding transaction to be safely broadcast.
-	p2wsh, err := witnessScriptHash(redeemScript)
+	p2wsh, err := witnessScriptHash(witnessScript)
 	if err != nil {
 		req.err <- err
 		return
 	}
 	signDesc := SignDescriptor{
-		RedeemScript: redeemScript,
+		WitnessScript: witnessScript,
 		PubKey:       ourKey,
 		Output: &wire.TxOut{
 			PkScript: p2wsh,
@@ -1201,7 +1201,7 @@ out:
 
 // selectCoinsAndChange performs coin selection in order to obtain witness
 // outputs which sum to at least 'numCoins' amount of satoshis. If coin
-// selection is succesful/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
 // also be generated.
 // TODO(roasbeef): remove hardcoded fees and req'd confs for outputs.
@@ -1210,7 +1210,7 @@ func (l *LightningWallet) selectCoinsAndChange(feeRate uint64, amt btcutil.Amoun
 
 	// We hold the coin select mutex while querying for outputs, and
 	// performing coin selection in order to avoid inadvertent double
-	// spends accross funding transactions.
+	// spends across funding transactions.
 	l.coinSelectMtx.Lock()
 	defer l.coinSelectMtx.Unlock()
 
@@ -1222,7 +1222,7 @@ func (l *LightningWallet) selectCoinsAndChange(feeRate uint64, amt btcutil.Amoun
 		return err
 	}
 
-	// Peform coin selection over our available, unlocked unspent outputs
+	// Perform coin selection over our available, unlocked unspent outputs
 	// in order to find enough coins to meet the funding amount
 	// requirements.
 	selectedCoins, changeAmt, err := coinSelect(feeRate, amt, coins)

peer.go

@@ -655,8 +655,8 @@ func (p *peer) executeForceClose(channel *lnwallet.LightningChannel) (*wire.ShaH
 		return nil, err
 	}
 
-	// Send the closed channel sumary over to the utxoNursery in order to
+	// Send the closed channel summary over to the utxoNursery in order to
-	// have its outputs sweeped back into the wallet once they're mature.
+	// have its outputs swept back into the wallet once they're mature.
 	p.server.utxoNursery.incubateOutputs(closeSummary)
 
 	return &txid, nil