499 lines
14 KiB
Go
499 lines
14 KiB
Go
package lnwallet
|
|
|
|
import (
|
|
"bytes"
|
|
"crypto/rand"
|
|
"encoding/binary"
|
|
"encoding/hex"
|
|
"io"
|
|
"io/ioutil"
|
|
prand "math/rand"
|
|
"net"
|
|
"os"
|
|
|
|
"github.com/btcsuite/btcd/btcec"
|
|
"github.com/btcsuite/btcd/chaincfg/chainhash"
|
|
"github.com/btcsuite/btcd/wire"
|
|
"github.com/btcsuite/btcutil"
|
|
"github.com/lightningnetwork/lnd/channeldb"
|
|
"github.com/lightningnetwork/lnd/input"
|
|
"github.com/lightningnetwork/lnd/keychain"
|
|
"github.com/lightningnetwork/lnd/lnwallet/chainfee"
|
|
"github.com/lightningnetwork/lnd/lnwire"
|
|
"github.com/lightningnetwork/lnd/shachain"
|
|
)
|
|
|
|
var (
|
|
// For simplicity a single priv key controls all of our test outputs.
|
|
testWalletPrivKey = []byte{
|
|
0x2b, 0xd8, 0x06, 0xc9, 0x7f, 0x0e, 0x00, 0xaf,
|
|
0x1a, 0x1f, 0xc3, 0x32, 0x8f, 0xa7, 0x63, 0xa9,
|
|
0x26, 0x97, 0x23, 0xc8, 0xdb, 0x8f, 0xac, 0x4f,
|
|
0x93, 0xaf, 0x71, 0xdb, 0x18, 0x6d, 0x6e, 0x90,
|
|
}
|
|
|
|
// We're alice :)
|
|
bobsPrivKey = []byte{
|
|
0x81, 0xb6, 0x37, 0xd8, 0xfc, 0xd2, 0xc6, 0xda,
|
|
0x63, 0x59, 0xe6, 0x96, 0x31, 0x13, 0xa1, 0x17,
|
|
0xd, 0xe7, 0x95, 0xe4, 0xb7, 0x25, 0xb8, 0x4d,
|
|
0x1e, 0xb, 0x4c, 0xfd, 0x9e, 0xc5, 0x8c, 0xe9,
|
|
}
|
|
|
|
// Use a hard-coded HD seed.
|
|
testHdSeed = chainhash.Hash{
|
|
0xb7, 0x94, 0x38, 0x5f, 0x2d, 0x1e, 0xf7, 0xab,
|
|
0x4d, 0x92, 0x73, 0xd1, 0x90, 0x63, 0x81, 0xb4,
|
|
0x4f, 0x2f, 0x6f, 0x25, 0x88, 0xa3, 0xef, 0xb9,
|
|
0x6a, 0x49, 0x18, 0x83, 0x31, 0x98, 0x47, 0x53,
|
|
}
|
|
|
|
// A serializable txn for testing funding txn.
|
|
testTx = &wire.MsgTx{
|
|
Version: 1,
|
|
TxIn: []*wire.TxIn{
|
|
{
|
|
PreviousOutPoint: wire.OutPoint{
|
|
Hash: chainhash.Hash{},
|
|
Index: 0xffffffff,
|
|
},
|
|
SignatureScript: []byte{0x04, 0x31, 0xdc, 0x00, 0x1b, 0x01, 0x62},
|
|
Sequence: 0xffffffff,
|
|
},
|
|
},
|
|
TxOut: []*wire.TxOut{
|
|
{
|
|
Value: 5000000000,
|
|
PkScript: []byte{
|
|
0x41, // OP_DATA_65
|
|
0x04, 0xd6, 0x4b, 0xdf, 0xd0, 0x9e, 0xb1, 0xc5,
|
|
0xfe, 0x29, 0x5a, 0xbd, 0xeb, 0x1d, 0xca, 0x42,
|
|
0x81, 0xbe, 0x98, 0x8e, 0x2d, 0xa0, 0xb6, 0xc1,
|
|
0xc6, 0xa5, 0x9d, 0xc2, 0x26, 0xc2, 0x86, 0x24,
|
|
0xe1, 0x81, 0x75, 0xe8, 0x51, 0xc9, 0x6b, 0x97,
|
|
0x3d, 0x81, 0xb0, 0x1c, 0xc3, 0x1f, 0x04, 0x78,
|
|
0x34, 0xbc, 0x06, 0xd6, 0xd6, 0xed, 0xf6, 0x20,
|
|
0xd1, 0x84, 0x24, 0x1a, 0x6a, 0xed, 0x8b, 0x63,
|
|
0xa6, // 65-byte signature
|
|
0xac, // OP_CHECKSIG
|
|
},
|
|
},
|
|
},
|
|
LockTime: 5,
|
|
}
|
|
)
|
|
|
|
// CreateTestChannels creates to fully populated channels to be used within
|
|
// testing fixtures. The channels will be returned as if the funding process
|
|
// has just completed. The channel itself is funded with 10 BTC, with 5 BTC
|
|
// allocated to each side. Within the channel, Alice is the initiator. The
|
|
// function also returns a "cleanup" function that is meant to be called once
|
|
// the test has been finalized. The clean up function will remote all temporary
|
|
// files created. If tweaklessCommits is true, then the commits within the
|
|
// channels will use the new format, otherwise the legacy format.
|
|
func CreateTestChannels(tweaklessCommits bool) (
|
|
*LightningChannel, *LightningChannel, func(), error) {
|
|
|
|
channelCapacity, err := btcutil.NewAmount(10)
|
|
if err != nil {
|
|
return nil, nil, nil, err
|
|
}
|
|
|
|
channelBal := channelCapacity / 2
|
|
aliceDustLimit := btcutil.Amount(200)
|
|
bobDustLimit := btcutil.Amount(1300)
|
|
csvTimeoutAlice := uint32(5)
|
|
csvTimeoutBob := uint32(4)
|
|
|
|
prevOut := &wire.OutPoint{
|
|
Hash: chainhash.Hash(testHdSeed),
|
|
Index: prand.Uint32(),
|
|
}
|
|
fundingTxIn := wire.NewTxIn(prevOut, nil, nil)
|
|
|
|
// For each party, we'll create a distinct set of keys in order to
|
|
// emulate the typical set up with live channels.
|
|
var (
|
|
aliceKeys []*btcec.PrivateKey
|
|
bobKeys []*btcec.PrivateKey
|
|
)
|
|
for i := 0; i < 5; i++ {
|
|
key := make([]byte, len(testWalletPrivKey))
|
|
copy(key[:], testWalletPrivKey[:])
|
|
key[0] ^= byte(i + 1)
|
|
|
|
aliceKey, _ := btcec.PrivKeyFromBytes(btcec.S256(), key)
|
|
aliceKeys = append(aliceKeys, aliceKey)
|
|
|
|
key = make([]byte, len(bobsPrivKey))
|
|
copy(key[:], bobsPrivKey)
|
|
key[0] ^= byte(i + 1)
|
|
|
|
bobKey, _ := btcec.PrivKeyFromBytes(btcec.S256(), key)
|
|
bobKeys = append(bobKeys, bobKey)
|
|
}
|
|
|
|
aliceCfg := channeldb.ChannelConfig{
|
|
ChannelConstraints: channeldb.ChannelConstraints{
|
|
DustLimit: aliceDustLimit,
|
|
MaxPendingAmount: lnwire.NewMSatFromSatoshis(channelCapacity),
|
|
ChanReserve: channelCapacity / 100,
|
|
MinHTLC: 0,
|
|
MaxAcceptedHtlcs: input.MaxHTLCNumber / 2,
|
|
CsvDelay: uint16(csvTimeoutAlice),
|
|
},
|
|
MultiSigKey: keychain.KeyDescriptor{
|
|
PubKey: aliceKeys[0].PubKey(),
|
|
},
|
|
RevocationBasePoint: keychain.KeyDescriptor{
|
|
PubKey: aliceKeys[1].PubKey(),
|
|
},
|
|
PaymentBasePoint: keychain.KeyDescriptor{
|
|
PubKey: aliceKeys[2].PubKey(),
|
|
},
|
|
DelayBasePoint: keychain.KeyDescriptor{
|
|
PubKey: aliceKeys[3].PubKey(),
|
|
},
|
|
HtlcBasePoint: keychain.KeyDescriptor{
|
|
PubKey: aliceKeys[4].PubKey(),
|
|
},
|
|
}
|
|
bobCfg := channeldb.ChannelConfig{
|
|
ChannelConstraints: channeldb.ChannelConstraints{
|
|
DustLimit: bobDustLimit,
|
|
MaxPendingAmount: lnwire.NewMSatFromSatoshis(channelCapacity),
|
|
ChanReserve: channelCapacity / 100,
|
|
MinHTLC: 0,
|
|
MaxAcceptedHtlcs: input.MaxHTLCNumber / 2,
|
|
CsvDelay: uint16(csvTimeoutBob),
|
|
},
|
|
MultiSigKey: keychain.KeyDescriptor{
|
|
PubKey: bobKeys[0].PubKey(),
|
|
},
|
|
RevocationBasePoint: keychain.KeyDescriptor{
|
|
PubKey: bobKeys[1].PubKey(),
|
|
},
|
|
PaymentBasePoint: keychain.KeyDescriptor{
|
|
PubKey: bobKeys[2].PubKey(),
|
|
},
|
|
DelayBasePoint: keychain.KeyDescriptor{
|
|
PubKey: bobKeys[3].PubKey(),
|
|
},
|
|
HtlcBasePoint: keychain.KeyDescriptor{
|
|
PubKey: bobKeys[4].PubKey(),
|
|
},
|
|
}
|
|
|
|
bobRoot, err := chainhash.NewHash(bobKeys[0].Serialize())
|
|
if err != nil {
|
|
return nil, nil, nil, err
|
|
}
|
|
bobPreimageProducer := shachain.NewRevocationProducer(*bobRoot)
|
|
bobFirstRevoke, err := bobPreimageProducer.AtIndex(0)
|
|
if err != nil {
|
|
return nil, nil, nil, err
|
|
}
|
|
bobCommitPoint := input.ComputeCommitmentPoint(bobFirstRevoke[:])
|
|
|
|
aliceRoot, err := chainhash.NewHash(aliceKeys[0].Serialize())
|
|
if err != nil {
|
|
return nil, nil, nil, err
|
|
}
|
|
alicePreimageProducer := shachain.NewRevocationProducer(*aliceRoot)
|
|
aliceFirstRevoke, err := alicePreimageProducer.AtIndex(0)
|
|
if err != nil {
|
|
return nil, nil, nil, err
|
|
}
|
|
aliceCommitPoint := input.ComputeCommitmentPoint(aliceFirstRevoke[:])
|
|
|
|
aliceCommitTx, bobCommitTx, err := CreateCommitmentTxns(
|
|
channelBal, channelBal, &aliceCfg, &bobCfg, aliceCommitPoint,
|
|
bobCommitPoint, *fundingTxIn, tweaklessCommits,
|
|
)
|
|
if err != nil {
|
|
return nil, nil, nil, err
|
|
}
|
|
|
|
alicePath, err := ioutil.TempDir("", "alicedb")
|
|
if err != nil {
|
|
return nil, nil, nil, err
|
|
}
|
|
|
|
dbAlice, err := channeldb.Open(alicePath)
|
|
if err != nil {
|
|
return nil, nil, nil, err
|
|
}
|
|
|
|
bobPath, err := ioutil.TempDir("", "bobdb")
|
|
if err != nil {
|
|
return nil, nil, nil, err
|
|
}
|
|
|
|
dbBob, err := channeldb.Open(bobPath)
|
|
if err != nil {
|
|
return nil, nil, nil, err
|
|
}
|
|
|
|
estimator := chainfee.NewStaticEstimator(6000, 0)
|
|
feePerKw, err := estimator.EstimateFeePerKW(1)
|
|
if err != nil {
|
|
return nil, nil, nil, err
|
|
}
|
|
commitFee := calcStaticFee(0)
|
|
|
|
aliceCommit := channeldb.ChannelCommitment{
|
|
CommitHeight: 0,
|
|
LocalBalance: lnwire.NewMSatFromSatoshis(channelBal - commitFee),
|
|
RemoteBalance: lnwire.NewMSatFromSatoshis(channelBal),
|
|
CommitFee: commitFee,
|
|
FeePerKw: btcutil.Amount(feePerKw),
|
|
CommitTx: aliceCommitTx,
|
|
CommitSig: bytes.Repeat([]byte{1}, 71),
|
|
}
|
|
bobCommit := channeldb.ChannelCommitment{
|
|
CommitHeight: 0,
|
|
LocalBalance: lnwire.NewMSatFromSatoshis(channelBal),
|
|
RemoteBalance: lnwire.NewMSatFromSatoshis(channelBal - commitFee),
|
|
CommitFee: commitFee,
|
|
FeePerKw: btcutil.Amount(feePerKw),
|
|
CommitTx: bobCommitTx,
|
|
CommitSig: bytes.Repeat([]byte{1}, 71),
|
|
}
|
|
|
|
var chanIDBytes [8]byte
|
|
if _, err := io.ReadFull(rand.Reader, chanIDBytes[:]); err != nil {
|
|
return nil, nil, nil, err
|
|
}
|
|
|
|
shortChanID := lnwire.NewShortChanIDFromInt(
|
|
binary.BigEndian.Uint64(chanIDBytes[:]),
|
|
)
|
|
|
|
aliceChannelState := &channeldb.OpenChannel{
|
|
LocalChanCfg: aliceCfg,
|
|
RemoteChanCfg: bobCfg,
|
|
IdentityPub: aliceKeys[0].PubKey(),
|
|
FundingOutpoint: *prevOut,
|
|
ShortChannelID: shortChanID,
|
|
ChanType: channeldb.SingleFunderTweaklessBit,
|
|
IsInitiator: true,
|
|
Capacity: channelCapacity,
|
|
RemoteCurrentRevocation: bobCommitPoint,
|
|
RevocationProducer: alicePreimageProducer,
|
|
RevocationStore: shachain.NewRevocationStore(),
|
|
LocalCommitment: aliceCommit,
|
|
RemoteCommitment: aliceCommit,
|
|
Db: dbAlice,
|
|
Packager: channeldb.NewChannelPackager(shortChanID),
|
|
FundingTxn: testTx,
|
|
}
|
|
bobChannelState := &channeldb.OpenChannel{
|
|
LocalChanCfg: bobCfg,
|
|
RemoteChanCfg: aliceCfg,
|
|
IdentityPub: bobKeys[0].PubKey(),
|
|
FundingOutpoint: *prevOut,
|
|
ShortChannelID: shortChanID,
|
|
ChanType: channeldb.SingleFunderTweaklessBit,
|
|
IsInitiator: false,
|
|
Capacity: channelCapacity,
|
|
RemoteCurrentRevocation: aliceCommitPoint,
|
|
RevocationProducer: bobPreimageProducer,
|
|
RevocationStore: shachain.NewRevocationStore(),
|
|
LocalCommitment: bobCommit,
|
|
RemoteCommitment: bobCommit,
|
|
Db: dbBob,
|
|
Packager: channeldb.NewChannelPackager(shortChanID),
|
|
}
|
|
|
|
if !tweaklessCommits {
|
|
aliceChannelState.ChanType = channeldb.SingleFunderBit
|
|
bobChannelState.ChanType = channeldb.SingleFunderBit
|
|
}
|
|
|
|
aliceSigner := &input.MockSigner{Privkeys: aliceKeys}
|
|
bobSigner := &input.MockSigner{Privkeys: bobKeys}
|
|
|
|
// TODO(roasbeef): make mock version of pre-image store
|
|
|
|
alicePool := NewSigPool(1, aliceSigner)
|
|
channelAlice, err := NewLightningChannel(
|
|
aliceSigner, aliceChannelState, alicePool,
|
|
)
|
|
if err != nil {
|
|
return nil, nil, nil, err
|
|
}
|
|
alicePool.Start()
|
|
|
|
bobPool := NewSigPool(1, bobSigner)
|
|
channelBob, err := NewLightningChannel(
|
|
bobSigner, bobChannelState, bobPool,
|
|
)
|
|
if err != nil {
|
|
return nil, nil, nil, err
|
|
}
|
|
bobPool.Start()
|
|
|
|
err = SetStateNumHint(
|
|
aliceCommitTx, 0, channelAlice.stateHintObfuscator,
|
|
)
|
|
if err != nil {
|
|
return nil, nil, nil, err
|
|
}
|
|
err = SetStateNumHint(
|
|
bobCommitTx, 0, channelAlice.stateHintObfuscator,
|
|
)
|
|
if err != nil {
|
|
return nil, nil, nil, err
|
|
}
|
|
|
|
addr := &net.TCPAddr{
|
|
IP: net.ParseIP("127.0.0.1"),
|
|
Port: 18556,
|
|
}
|
|
if err := channelAlice.channelState.SyncPending(addr, 101); err != nil {
|
|
return nil, nil, nil, err
|
|
}
|
|
|
|
addr = &net.TCPAddr{
|
|
IP: net.ParseIP("127.0.0.1"),
|
|
Port: 18555,
|
|
}
|
|
|
|
if err := channelBob.channelState.SyncPending(addr, 101); err != nil {
|
|
return nil, nil, nil, err
|
|
}
|
|
|
|
cleanUpFunc := func() {
|
|
os.RemoveAll(bobPath)
|
|
os.RemoveAll(alicePath)
|
|
|
|
alicePool.Stop()
|
|
bobPool.Stop()
|
|
}
|
|
|
|
// Now that the channel are open, simulate the start of a session by
|
|
// having Alice and Bob extend their revocation windows to each other.
|
|
err = initRevocationWindows(channelAlice, channelBob)
|
|
if err != nil {
|
|
return nil, nil, nil, err
|
|
}
|
|
|
|
return channelAlice, channelBob, cleanUpFunc, nil
|
|
}
|
|
|
|
// initRevocationWindows simulates a new channel being opened within the p2p
|
|
// network by populating the initial revocation windows of the passed
|
|
// commitment state machines.
|
|
func initRevocationWindows(chanA, chanB *LightningChannel) error {
|
|
aliceNextRevoke, err := chanA.NextRevocationKey()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if err := chanB.InitNextRevocation(aliceNextRevoke); err != nil {
|
|
return err
|
|
}
|
|
|
|
bobNextRevoke, err := chanB.NextRevocationKey()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if err := chanA.InitNextRevocation(bobNextRevoke); err != nil {
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// pubkeyFromHex parses a Bitcoin public key from a hex encoded string.
|
|
func pubkeyFromHex(keyHex string) (*btcec.PublicKey, error) {
|
|
bytes, err := hex.DecodeString(keyHex)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return btcec.ParsePubKey(bytes, btcec.S256())
|
|
}
|
|
|
|
// privkeyFromHex parses a Bitcoin private key from a hex encoded string.
|
|
func privkeyFromHex(keyHex string) (*btcec.PrivateKey, error) {
|
|
bytes, err := hex.DecodeString(keyHex)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
key, _ := btcec.PrivKeyFromBytes(btcec.S256(), bytes)
|
|
return key, nil
|
|
|
|
}
|
|
|
|
// blockFromHex parses a full Bitcoin block from a hex encoded string.
|
|
func blockFromHex(blockHex string) (*btcutil.Block, error) {
|
|
bytes, err := hex.DecodeString(blockHex)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return btcutil.NewBlockFromBytes(bytes)
|
|
}
|
|
|
|
// txFromHex parses a full Bitcoin transaction from a hex encoded string.
|
|
func txFromHex(txHex string) (*btcutil.Tx, error) {
|
|
bytes, err := hex.DecodeString(txHex)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return btcutil.NewTxFromBytes(bytes)
|
|
}
|
|
|
|
// calcStaticFee calculates appropriate fees for commitment transactions. This
|
|
// function provides a simple way to allow test balance assertions to take fee
|
|
// calculations into account.
|
|
//
|
|
// TODO(bvu): Refactor when dynamic fee estimation is added.
|
|
func calcStaticFee(numHTLCs int) btcutil.Amount {
|
|
const (
|
|
commitWeight = btcutil.Amount(724)
|
|
htlcWeight = 172
|
|
feePerKw = btcutil.Amount(24/4) * 1000
|
|
)
|
|
return feePerKw * (commitWeight +
|
|
btcutil.Amount(htlcWeight*numHTLCs)) / 1000
|
|
}
|
|
|
|
// ForceStateTransition executes the necessary interaction between the two
|
|
// commitment state machines to transition to a new state locking in any
|
|
// pending updates. This method is useful when testing interactions between two
|
|
// live state machines.
|
|
func ForceStateTransition(chanA, chanB *LightningChannel) error {
|
|
aliceSig, aliceHtlcSigs, _, err := chanA.SignNextCommitment()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if err = chanB.ReceiveNewCommitment(aliceSig, aliceHtlcSigs); err != nil {
|
|
return err
|
|
}
|
|
|
|
bobRevocation, _, err := chanB.RevokeCurrentCommitment()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
bobSig, bobHtlcSigs, _, err := chanB.SignNextCommitment()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
if _, _, _, _, err := chanA.ReceiveRevocation(bobRevocation); err != nil {
|
|
return err
|
|
}
|
|
if err := chanA.ReceiveNewCommitment(bobSig, bobHtlcSigs); err != nil {
|
|
return err
|
|
}
|
|
|
|
aliceRevocation, _, err := chanA.RevokeCurrentCommitment()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if _, _, _, _, err := chanB.ReceiveRevocation(aliceRevocation); err != nil {
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|