channeldb: implement commitment state update log
This commit implements a state update log which is intended the record the relevant information for each state transition on disk. For each state transition a delta should be written recording the new state. A new method is also provided which is able to retrieve a previous channel state based on a state update #. At the moment no measures has been taken to optimize the space utilization of each update on disk. There are several low-hanging fruits which can be addressed at a later point. Ultimately the update log itself should be implemented with an append-only flat file at the storage level. In any case, the high level abstraction should be able to maintained independent of differences in the on-disk format itself.
This commit is contained in:
Olaoluwa Osuntokun
parent
d2acb4336c
commit
6684f6aedf
|
|
@ -2,6 +2,7 @@ package channeldb
|
|||
|
||||
import (
|
||||
"bytes"
|
||||
"fmt"
|
||||
"io"
|
||||
"sync"
|
||||
"time"
|
||||
|
|
@ -87,12 +88,13 @@ var (
|
|||
deliveryScriptsKey = []byte("dsk")
|
||||
)
|
||||
|
||||
// OpenChannel...
|
||||
// TODO(roasbeef): Copy/Clone method, so CoW on writes?
|
||||
// * CoW method would allow for intelligent partial writes for updates
|
||||
// TODO(roasbeef): UpdateState(func (newChan *OpenChannel) error)
|
||||
// * need mutex, invarient that all reads/writes grab the mutex
|
||||
// * needs to also return two slices of added then removed HTLC's
|
||||
// OpenChannel encapsulates the persistent and dynamic state of an open channel
|
||||
// with a remote node. An open channel supports several options for on-disk
|
||||
// serialization depending on the exact context. Full (upon channel creation)
|
||||
// state commitments, and partial (due to a commitment update) writes are
|
||||
// supported. Each partial write due to a state update appends the new update
|
||||
// to an on-disk log, which can then subsequently be queried in order to
|
||||
// "time-travel" to a prior state.
|
||||
type OpenChannel struct {
|
||||
// Hash? or Their current pubKey?
|
||||
TheirLNID [wire.HashSize]byte
|
||||
|
|
@ -150,13 +152,6 @@ type OpenChannel struct {
|
|||
TotalNetFees uint64 // TODO(roasbeef): total fees paid too?
|
||||
CreationTime time.Time // TODO(roasbeef): last update time?
|
||||
|
||||
// isPrevState denotes if this instance of an OpenChannel is a previous,
|
||||
// revoked channel state. If so, then the FullSynv, and UpdateState
|
||||
// methods are disabled in order to prevent overiding the latest channel
|
||||
// state.
|
||||
// TODO(roasbeef): scrap? already have snapshots now?
|
||||
isPrevState bool
|
||||
|
||||
// TODO(roasbeef): eww
|
||||
Db *DB
|
||||
|
||||
|
|
@ -232,6 +227,132 @@ func (c *OpenChannel) SyncRevocation() error {
|
|||
})
|
||||
}
|
||||
|
||||
// HTLC is the on-disk representation of a hash time-locked contract. HTLC's
|
||||
// are contained within ChannelDeltas which encode the current state of the
|
||||
// commitment between state updates.
|
||||
type HTLC struct {
|
||||
// Incoming denotes whether we're the receiver or the sender of this
|
||||
// HTLC.
|
||||
Incoming bool
|
||||
|
||||
// Amt is the amount of satoshis this HTLC escrows.
|
||||
Amt btcutil.Amount
|
||||
|
||||
// RHash is the payment hash of the HTLC.
|
||||
RHash [32]byte
|
||||
|
||||
// RefundTimeout is the absolute timeout on the HTLC that the sender
|
||||
// must wait before reclaiming the funds in limbo.
|
||||
RefundTimeout uint32
|
||||
|
||||
// RevocationTimeout is the relative timeout the party who broadcasts
|
||||
// the commitment transaction must wait before being able to fully
|
||||
// sweep the funds on-chain in the case of a unilateral channel
|
||||
// closure.
|
||||
RevocationTimeout uint32
|
||||
}
|
||||
|
||||
// ChannelDelta is a snapshot of the commitment state at a particular point in
|
||||
// the commitment chain. With each state transition, a snapshot of the current
|
||||
// state along with all non-settled HTLC's are recorded.
|
||||
// TODO(roasbeef): should only need the key instead of hash after refactor
|
||||
// within state machine.
|
||||
// * won't actually be needed if it's a past state?
|
||||
type ChannelDelta struct {
|
||||
RevocationHash [32]byte
|
||||
RevocationKey *btcec.PublicKey
|
||||
|
||||
LocalBalance btcutil.Amount
|
||||
RemoteBalance btcutil.Amount
|
||||
|
||||
Htlcs []*HTLC
|
||||
|
||||
UpdateNum uint32
|
||||
}
|
||||
|
||||
// RecordChannelDelta records the new state transition within an on-disk
|
||||
// append-only log which records all state transitions. Additionally, the
|
||||
// internal balances and update counter of the target OpenChannel are updated
|
||||
// accordingly based on the passed delta.
|
||||
func (c *OpenChannel) RecordChannelDelta(delta *ChannelDelta) error {
|
||||
return c.Db.store.Update(func(tx *bolt.Tx) error {
|
||||
chanBucket, err := tx.CreateBucketIfNotExists(openChannelBucket)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
id := c.TheirLNID[:]
|
||||
nodeChanBucket, err := chanBucket.CreateBucketIfNotExists(id)
|
||||
if nodeChanBucket == nil {
|
||||
return ErrNoActiveChannels
|
||||
}
|
||||
|
||||
c.OurBalance = delta.LocalBalance
|
||||
c.TheirBalance = delta.RemoteBalance
|
||||
c.NumUpdates = uint64(delta.UpdateNum)
|
||||
|
||||
// First we'll write out the current latest dynamic channel
|
||||
// state: the current channel balance, the number of updates,
|
||||
// and our latest commitment transaction+sig.
|
||||
if err := putChanCapacity(chanBucket, c); err != nil {
|
||||
return err
|
||||
}
|
||||
if err := putChanNumUpdates(chanBucket, c); err != nil {
|
||||
return err
|
||||
}
|
||||
if err := putChanCommitTxns(nodeChanBucket, c); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
// With the current state updated, append a new log entry
|
||||
// recording this the delta of this state transition.
|
||||
// TODO(roasbeef): could make the deltas relative, would save
|
||||
// space, but then tradeoff for more disk-seeks to recover the
|
||||
// full state.
|
||||
logKey := channelLogBucket
|
||||
logBucket, err := nodeChanBucket.CreateBucketIfNotExists(logKey)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
return appendChannelLogEntry(logBucket, delta, c.ChanID)
|
||||
})
|
||||
}
|
||||
|
||||
// FindPreviousState scans through the append-only log in an attempt to recover
|
||||
// the previous channel state indicated by the update number. This method is
|
||||
// intended to be used for obtaining the relevant data needed to claim all
|
||||
// funds rightfully spendable in the case of an on-chain broadcast of the
|
||||
// commitment transaction.
|
||||
func (c *OpenChannel) FindPreviousState(updateNum uint64) (*ChannelDelta, error) {
|
||||
delta := &ChannelDelta{}
|
||||
|
||||
err := c.Db.store.View(func(tx *bolt.Tx) error {
|
||||
chanBucket := tx.Bucket(openChannelBucket)
|
||||
|
||||
nodeChanBucket := chanBucket.Bucket(c.TheirLNID[:])
|
||||
if nodeChanBucket == nil {
|
||||
return ErrNoActiveChannels
|
||||
}
|
||||
|
||||
logBucket := nodeChanBucket.Bucket(channelLogBucket)
|
||||
if nodeChanBucket == nil {
|
||||
return ErrNoPastDeltas
|
||||
}
|
||||
|
||||
var err error
|
||||
delta, err = fetchChannelLogEntry(logBucket, c.ChanID,
|
||||
uint32(updateNum))
|
||||
|
||||
return err
|
||||
})
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
return delta, nil
|
||||
}
|
||||
|
||||
// CloseChannel closes a previously active lightning channel. Closing a channel
|
||||
// entails deleting all saved state within the database concerning this
|
||||
// channel, as well as created a small channel summary for record keeping
|
||||
|
|
@ -267,7 +388,7 @@ func (c *OpenChannel) CloseChannel() error {
|
|||
}
|
||||
|
||||
// Now that the index to this channel has been deleted, purge
|
||||
// the remaining channel meta-data from the databse.
|
||||
// the remaining channel meta-data from the database.
|
||||
if err := deleteOpenChannel(chanBucket, nodeChanBucket,
|
||||
outPointBytes); err != nil {
|
||||
return err
|
||||
|
|
@ -282,8 +403,6 @@ func (c *OpenChannel) CloseChannel() error {
|
|||
// ChannelSnapshot is a frozen snapshot of the current channel state. A
|
||||
// snapshot is detached from the original channel that generated it, providing
|
||||
// read-only access to the current or prior state of an active channel.
|
||||
// TODO(roasbeef): methods to roll forwards/backwards in state etc
|
||||
// * use botldb cursor?
|
||||
type ChannelSnapshot struct {
|
||||
RemoteID [wire.HashSize]byte
|
||||
|
||||
|
|
@ -299,8 +418,6 @@ type ChannelSnapshot struct {
|
|||
TotalSatoshisReceived uint64
|
||||
|
||||
// TODO(roasbeef): fee stuff
|
||||
|
||||
// TODO(roasbeef): active HTLC's + their direction
|
||||
updateNum uint64
|
||||
channel *OpenChannel
|
||||
}
|
||||
|
|
@ -320,32 +437,12 @@ func (c *OpenChannel) Snapshot() *ChannelSnapshot {
|
|||
}
|
||||
copy(snapshot.RemoteID[:], c.TheirLNID[:])
|
||||
|
||||
// TODO(roasbeef): cache current channel delta in memory, either merge
|
||||
// or replace with ChannelSnapshot
|
||||
|
||||
return snapshot
|
||||
}
|
||||
|
||||
// FindPreviousState...
|
||||
// TODO(roasbeef): method to retrieve both old commitment txns given update #
|
||||
func (c *OpenChannel) FindPreviousState(updateNum uint64) (*ChannelSnapshot, error) {
|
||||
return nil, nil
|
||||
}
|
||||
|
||||
// ChannelDelta...
|
||||
// TODO(roasbeef): binlog like entry?
|
||||
type ChannelDelta struct {
|
||||
// change in allocations
|
||||
// added + removed htlcs
|
||||
// index
|
||||
}
|
||||
|
||||
// RecordChannelDelta
|
||||
// TODO(roasbeef): only need their commit?
|
||||
// * or as internal helper func to UpdateState func?
|
||||
func (c OpenChannel) RecordChannelDelta(theirRevokedCommit *wire.MsgTx, updateNum uint64) error {
|
||||
// TODO(roasbeef): record all HTLCs, pass those instead?
|
||||
// *
|
||||
return nil
|
||||
}
|
||||
|
||||
func putClosedChannelSummary(tx *bolt.Tx, chanID []byte) error {
|
||||
// For now, a summary of a closed channel simply involves recording the
|
||||
// outpoint of the funding transaction.
|
||||
|
|
@ -870,6 +967,7 @@ func putChanCommitTxns(nodeChanBucket *bolt.Bucket, channel *OpenChannel) error
|
|||
return err
|
||||
}
|
||||
|
||||
// TODO(roasbeef): should move this into putChanFundingInfo
|
||||
scratch := make([]byte, 4)
|
||||
byteOrder.PutUint32(scratch, channel.LocalCsvDelay)
|
||||
if _, err := b.Write(scratch); err != nil {
|
||||
|
|
@ -1168,9 +1266,212 @@ func fetchChanDeliveryScripts(nodeChanBucket *bolt.Bucket, channel *OpenChannel)
|
|||
return nil
|
||||
}
|
||||
|
||||
// htlcDiskSize represents the number of btyes a serialized HTLC takes up on
|
||||
// disk. The size of an HTLC on disk is 49 bytes total: incoming (1) + amt (8)
|
||||
// + rhash (32) + timeouts (8)
|
||||
const htlcDiskSize = 1 + 8 + 32 + 4 + 4
|
||||
|
||||
func serializeHTLC(w io.Writer, h *HTLC) error {
|
||||
var buf [htlcDiskSize]byte
|
||||
|
||||
var boolByte [1]byte
|
||||
if h.Incoming {
|
||||
boolByte[0] = 1
|
||||
} else {
|
||||
boolByte[0] = 0
|
||||
}
|
||||
|
||||
var n int
|
||||
n += copy(buf[:], boolByte[:])
|
||||
byteOrder.PutUint64(buf[n:], uint64(h.Amt))
|
||||
n += 8
|
||||
n += copy(buf[n:], h.RHash[:])
|
||||
byteOrder.PutUint32(buf[n:], h.RefundTimeout)
|
||||
n += 4
|
||||
byteOrder.PutUint32(buf[n:], h.RevocationTimeout)
|
||||
n += 4
|
||||
|
||||
if _, err := w.Write(buf[:]); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func deserializeHTLC(r io.Reader) (*HTLC, error) {
|
||||
h := &HTLC{}
|
||||
|
||||
var scratch [8]byte
|
||||
|
||||
if _, err := r.Read(scratch[:1]); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
if scratch[0] == 1 {
|
||||
h.Incoming = true
|
||||
} else {
|
||||
h.Incoming = false
|
||||
}
|
||||
|
||||
if _, err := r.Read(scratch[:]); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
h.Amt = btcutil.Amount(byteOrder.Uint64(scratch[:]))
|
||||
|
||||
if _, err := r.Read(h.RHash[:]); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
if _, err := r.Read(scratch[:4]); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
h.RefundTimeout = byteOrder.Uint32(scratch[:4])
|
||||
|
||||
if _, err := r.Read(scratch[:4]); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
h.RevocationTimeout = byteOrder.Uint32(scratch[:])
|
||||
|
||||
return h, nil
|
||||
}
|
||||
|
||||
func serializeChannelDelta(w io.Writer, delta *ChannelDelta) error {
|
||||
if _, err := w.Write(delta.RevocationHash[:]); err != nil {
|
||||
return err
|
||||
}
|
||||
serializeKey := delta.RevocationKey.SerializeCompressed()
|
||||
if _, err := w.Write(serializeKey); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
// TODO(roasbeef): could use compression here to reduce on-disk space.
|
||||
var scratch [8]byte
|
||||
byteOrder.PutUint64(scratch[:], uint64(delta.LocalBalance))
|
||||
if _, err := w.Write(scratch[:]); err != nil {
|
||||
return err
|
||||
}
|
||||
byteOrder.PutUint64(scratch[:], uint64(delta.RemoteBalance))
|
||||
if _, err := w.Write(scratch[:]); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
byteOrder.PutUint32(scratch[:4], delta.UpdateNum)
|
||||
if _, err := w.Write(scratch[:4]); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
numHtlcs := uint64(len(delta.Htlcs))
|
||||
if err := wire.WriteVarInt(w, 0, numHtlcs); err != nil {
|
||||
return err
|
||||
}
|
||||
for _, htlc := range delta.Htlcs {
|
||||
if err := serializeHTLC(w, htlc); err != nil {
|
||||
return err
|
||||
}
|
||||
}
|
||||
|
||||
return nil
|
||||
}
|
||||
|
||||
func deserializeChannelDelta(r io.Reader) (*ChannelDelta, error) {
|
||||
var (
|
||||
err error
|
||||
scratch [8]byte
|
||||
key [33]byte
|
||||
)
|
||||
|
||||
delta := &ChannelDelta{}
|
||||
if _, err = r.Read(delta.RevocationHash[:]); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
if _, err = r.Read(key[:]); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
delta.RevocationKey, err = btcec.ParsePubKey(key[:], btcec.S256())
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
if _, err := r.Read(scratch[:]); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
delta.LocalBalance = btcutil.Amount(byteOrder.Uint64(scratch[:]))
|
||||
if _, err := r.Read(scratch[:]); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
delta.RemoteBalance = btcutil.Amount(byteOrder.Uint64(scratch[:]))
|
||||
|
||||
if _, err := r.Read(scratch[:4]); err != nil {
|
||||
return nil, err
|
||||
}
|
||||
delta.UpdateNum = byteOrder.Uint32(scratch[:4])
|
||||
|
||||
numHtlcs, err := wire.ReadVarInt(r, 0)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
delta.Htlcs = make([]*HTLC, numHtlcs)
|
||||
for i := uint64(0); i < numHtlcs; i++ {
|
||||
htlc, err := deserializeHTLC(r)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
|
||||
delta.Htlcs[i] = htlc
|
||||
}
|
||||
|
||||
return delta, nil
|
||||
}
|
||||
|
||||
func appendChannelLogEntry(log *bolt.Bucket, delta *ChannelDelta,
|
||||
chanPoint *wire.OutPoint) error {
|
||||
|
||||
// First construct the key for this particular log entry. The key for
|
||||
// each newly added log entry is: channelPoint || stateNum.
|
||||
var logEntrykey [36 + 4]byte
|
||||
copy(logEntrykey[:], chanPoint.Hash[:])
|
||||
var scratch [4]byte
|
||||
byteOrder.PutUint32(scratch[:], delta.UpdateNum)
|
||||
copy(logEntrykey[36:], scratch[:])
|
||||
|
||||
// With the key constructed, serialize the delta to raw bytes, then
|
||||
// write the new state to disk.
|
||||
var b bytes.Buffer
|
||||
if err := serializeChannelDelta(&b, delta); err != nil {
|
||||
return err
|
||||
}
|
||||
|
||||
return log.Put(logEntrykey[:], b.Bytes())
|
||||
}
|
||||
|
||||
func fetchChannelLogEntry(log *bolt.Bucket, chanPoint *wire.OutPoint,
|
||||
updateNum uint32) (*ChannelDelta, error) {
|
||||
|
||||
// First construct the key for this particular log entry. The key for
|
||||
// each newly added log entry is: channelPoint || stateNum.
|
||||
// TODO(roasbeef): make into func..
|
||||
var logEntrykey [36 + 4]byte
|
||||
copy(logEntrykey[:], chanPoint.Hash[:])
|
||||
var scratch [4]byte
|
||||
byteOrder.PutUint32(scratch[:], updateNum)
|
||||
copy(logEntrykey[36:], scratch[:])
|
||||
|
||||
deltaBytes := log.Get(logEntrykey[:])
|
||||
if deltaBytes == nil {
|
||||
return nil, fmt.Errorf("log entry not found")
|
||||
}
|
||||
|
||||
deltaReader := bytes.NewReader(deltaBytes)
|
||||
|
||||
return deserializeChannelDelta(deltaReader)
|
||||
}
|
||||
|
||||
func writeOutpoint(w io.Writer, o *wire.OutPoint) error {
|
||||
// TODO(roasbeef): make all scratch buffers on the stack
|
||||
scratch := make([]byte, 4)
|
||||
|
||||
// TODO(roasbeef): write raw 32 bytes instead of wasting the extra
|
||||
// byte.
|
||||
if err := wire.WriteVarBytes(w, 0, o.Hash[:]); err != nil {
|
||||
return err
|
||||
}
|
||||
|
|
|
|||
|
|
@ -8,6 +8,7 @@ import (
|
|||
"testing"
|
||||
"time"
|
||||
|
||||
"github.com/davecgh/go-spew/spew"
|
||||
"github.com/lightningnetwork/lnd/elkrem"
|
||||
"github.com/roasbeef/btcd/btcec"
|
||||
"github.com/roasbeef/btcd/chaincfg"
|
||||
|
|
@ -76,35 +77,44 @@ var (
|
|||
Hash: key,
|
||||
Index: 0,
|
||||
}
|
||||
privKey, pubKey = btcec.PrivKeyFromBytes(btcec.S256(), key[:])
|
||||
)
|
||||
|
||||
func TestOpenChannelPutGetDelete(t *testing.T) {
|
||||
// makeTestDB creates a new instance of the ChannelDB for testing purposes. A
|
||||
// callback which cleans up the created temporary directories is also returned
|
||||
// and intended to be executed after the test completes.
|
||||
func makeTestDB() (*DB, func(), error) {
|
||||
// First, create a temporary directory to be used for the duration of
|
||||
// this test.
|
||||
// TODO(roasbeef): move initial set up to something within testing.Main
|
||||
tempDirName, err := ioutil.TempDir("", "channeldb")
|
||||
if err != nil {
|
||||
t.Fatalf("unable to create temp dir: %v")
|
||||
return nil, nil, err
|
||||
}
|
||||
defer os.RemoveAll(tempDirName)
|
||||
|
||||
// Next, create channeldb for the first time, also setting a mock
|
||||
// EncryptorDecryptor implementation for testing purposes.
|
||||
cdb, err := Open(tempDirName, netParams)
|
||||
if err != nil {
|
||||
t.Fatalf("unable to create channeldb: %v", err)
|
||||
return nil, nil, err
|
||||
}
|
||||
defer cdb.Close()
|
||||
|
||||
privKey, pubKey := btcec.PrivKeyFromBytes(btcec.S256(), key[:])
|
||||
cleanUp := func() {
|
||||
os.RemoveAll(tempDirName)
|
||||
cdb.Close()
|
||||
}
|
||||
|
||||
return cdb, cleanUp, nil
|
||||
}
|
||||
|
||||
func createTestChannelState(cdb *DB) (*OpenChannel, error) {
|
||||
addr, err := btcutil.NewAddressPubKey(pubKey.SerializeCompressed(), netParams)
|
||||
if err != nil {
|
||||
t.Fatalf("unable to create delivery address")
|
||||
return nil, err
|
||||
}
|
||||
|
||||
script, err := txscript.MultiSigScript([]*btcutil.AddressPubKey{addr, addr}, 2)
|
||||
if err != nil {
|
||||
t.Fatalf("unable to create redeemScript")
|
||||
return nil, err
|
||||
}
|
||||
|
||||
// Simulate 1000 channel updates via progression of the elkrem
|
||||
|
|
@ -114,15 +124,15 @@ func TestOpenChannelPutGetDelete(t *testing.T) {
|
|||
for i := 0; i < 1000; i++ {
|
||||
preImage, err := sender.AtIndex(uint64(i))
|
||||
if err != nil {
|
||||
t.Fatalf("unable to progress elkrem sender: %v", err)
|
||||
return nil, err
|
||||
}
|
||||
|
||||
if receiver.AddNext(preImage); err != nil {
|
||||
t.Fatalf("unable to progress elkrem receiver: %v", err)
|
||||
return nil, err
|
||||
}
|
||||
}
|
||||
|
||||
state := OpenChannel{
|
||||
return &OpenChannel{
|
||||
TheirLNID: key,
|
||||
ChanID: id,
|
||||
MinFeePerKb: btcutil.Amount(5000),
|
||||
|
|
@ -145,14 +155,26 @@ func TestOpenChannelPutGetDelete(t *testing.T) {
|
|||
TheirDeliveryScript: script,
|
||||
LocalCsvDelay: 5,
|
||||
RemoteCsvDelay: 9,
|
||||
NumUpdates: 1,
|
||||
NumUpdates: 0,
|
||||
TotalSatoshisSent: 8,
|
||||
TotalSatoshisReceived: 2,
|
||||
TotalNetFees: 9,
|
||||
CreationTime: time.Date(2009, time.November, 10, 23, 0, 0, 0, time.UTC),
|
||||
Db: cdb,
|
||||
}
|
||||
}, nil
|
||||
}
|
||||
|
||||
func TestOpenChannelPutGetDelete(t *testing.T) {
|
||||
cdb, cleanUp, err := makeTestDB()
|
||||
if err != nil {
|
||||
t.Fatalf("uanble to make test database: %v", err)
|
||||
}
|
||||
defer cleanUp()
|
||||
|
||||
state, err := createTestChannelState(cdb)
|
||||
if err != nil {
|
||||
t.Fatalf("unable to create channel state: %v", err)
|
||||
}
|
||||
if err := state.FullSync(); err != nil {
|
||||
t.Fatalf("unable to save and serialize channel state: %v", err)
|
||||
}
|
||||
|
|
@ -302,5 +324,121 @@ func TestOpenChannelPutGetDelete(t *testing.T) {
|
|||
}
|
||||
}
|
||||
|
||||
func TestOpenChannelEncodeDecodeCorruption(t *testing.T) {
|
||||
func TestChannelStateUpdateLog(t *testing.T) {
|
||||
cdb, cleanUp, err := makeTestDB()
|
||||
if err != nil {
|
||||
t.Fatalf("uanble to make test database: %v", err)
|
||||
}
|
||||
defer cleanUp()
|
||||
|
||||
// First create a minimal channel, then perform a full sync in order to
|
||||
// persist the data.
|
||||
channel, err := createTestChannelState(cdb)
|
||||
if err != nil {
|
||||
t.Fatalf("unable to create channel state: %v", err)
|
||||
}
|
||||
if err := channel.FullSync(); err != nil {
|
||||
t.Fatalf("unable to save and serialize channel state: %v", err)
|
||||
}
|
||||
|
||||
// Add some HTLC's which were added during this new state transition.
|
||||
// Half of the HTLC's are incoming, while the other half are outgoing.
|
||||
var htlcs []*HTLC
|
||||
for i := uint32(0); i < 10; i++ {
|
||||
var incoming bool
|
||||
if i > 5 {
|
||||
incoming = true
|
||||
}
|
||||
htlc := &HTLC{
|
||||
Incoming: incoming,
|
||||
Amt: 50000,
|
||||
RHash: key,
|
||||
RefundTimeout: i,
|
||||
RevocationTimeout: i + 2,
|
||||
}
|
||||
htlcs = append(htlcs, htlc)
|
||||
}
|
||||
|
||||
// Create a new channel delta which includes the above HTLC's, some
|
||||
// balance updates, and an increment of the current commitment height.
|
||||
// Additionally, modify the signature and commitment transaction.
|
||||
newSequence := uint32(129498)
|
||||
newSig := bytes.Repeat([]byte{3}, 71)
|
||||
delta := &ChannelDelta{
|
||||
RevocationHash: key,
|
||||
RevocationKey: pubKey,
|
||||
LocalBalance: btcutil.Amount(1e8),
|
||||
RemoteBalance: btcutil.Amount(1e8),
|
||||
Htlcs: htlcs,
|
||||
UpdateNum: 1,
|
||||
}
|
||||
channel.OurCommitTx.TxIn[0].Sequence = newSequence
|
||||
channel.OurCommitSig = newSig
|
||||
if err := channel.RecordChannelDelta(delta); err != nil {
|
||||
t.Fatalf("unable to record channel delta: %v", err)
|
||||
}
|
||||
|
||||
// The balances, new update, and the changes to the fake commitment
|
||||
// transaction along with the modified signature should all have been
|
||||
// updated.
|
||||
nodeID := wire.ShaHash(channel.TheirLNID)
|
||||
updatedChannel, err := cdb.FetchOpenChannels(&nodeID)
|
||||
if err != nil {
|
||||
t.Fatalf("unable to fetch updated channel: %v", err)
|
||||
}
|
||||
if !bytes.Equal(updatedChannel[0].OurCommitSig, newSig) {
|
||||
t.Fatalf("sigs don't match %x vs %x",
|
||||
updatedChannel[0].OurCommitSig, newSig)
|
||||
}
|
||||
if updatedChannel[0].OurCommitTx.TxIn[0].Sequence != newSequence {
|
||||
t.Fatalf("sequence numbers don't match: %v vs %v",
|
||||
updatedChannel[0].OurCommitTx.TxIn[0].Sequence, newSequence)
|
||||
}
|
||||
if updatedChannel[0].OurBalance != delta.LocalBalance {
|
||||
t.Fatalf("local balances don't match: %v vs %v",
|
||||
updatedChannel[0].OurBalance, delta.LocalBalance)
|
||||
}
|
||||
if updatedChannel[0].TheirBalance != delta.RemoteBalance {
|
||||
t.Fatalf("remote balances don't match: %v vs %v",
|
||||
updatedChannel[0].TheirBalance, delta.RemoteBalance)
|
||||
}
|
||||
if updatedChannel[0].NumUpdates != uint64(delta.UpdateNum) {
|
||||
t.Fatalf("update # doesn't match: %v vs %v",
|
||||
updatedChannel[0].NumUpdates, delta.UpdateNum)
|
||||
}
|
||||
|
||||
// We should be able to fetch the channel delta created above by it's
|
||||
// update number with all the state properly reconstructed.
|
||||
diskDelta, err := channel.FindPreviousState(uint64(delta.UpdateNum))
|
||||
if err != nil {
|
||||
t.Fatalf("unable to fetch past delta: %v", err)
|
||||
}
|
||||
|
||||
// The two deltas (the original vs the on-disk version) should
|
||||
// identical, and all HTLC data should properly be retained.
|
||||
if !bytes.Equal(delta.RevocationHash[:], diskDelta.RevocationHash[:]) {
|
||||
t.Fatalf("revocation hashes don't match")
|
||||
}
|
||||
if !bytes.Equal(delta.RevocationKey.SerializeCompressed(),
|
||||
diskDelta.RevocationKey.SerializeCompressed()) {
|
||||
t.Fatalf("revocation keys don't match")
|
||||
}
|
||||
if delta.LocalBalance != diskDelta.LocalBalance {
|
||||
t.Fatalf("local balances don't match")
|
||||
}
|
||||
if delta.RemoteBalance != diskDelta.RemoteBalance {
|
||||
t.Fatalf("remote balances don't match")
|
||||
}
|
||||
if delta.UpdateNum != diskDelta.UpdateNum {
|
||||
t.Fatalf("update number doesn't match")
|
||||
}
|
||||
for i := 0; i < len(delta.Htlcs); i++ {
|
||||
originalHTLC := delta.Htlcs[i]
|
||||
diskHTLC := diskDelta.Htlcs[i]
|
||||
if !reflect.DeepEqual(originalHTLC, diskHTLC) {
|
||||
t.Fatalf("htlc's dont match: %v vs %v",
|
||||
spew.Sdump(originalHTLC),
|
||||
spew.Sdump(diskHTLC))
|
||||
}
|
||||
}
|
||||
}
|
||||
|
|
|
|||
|
|
@ -7,4 +7,5 @@ var (
|
|||
|
||||
ErrNoActiveChannels = fmt.Errorf("no active channels exist")
|
||||
ErrChannelNoExist = fmt.Errorf("this channel does not exist")
|
||||
ErrNoPastDeltas = fmt.Errorf("channel has no recorded deltas")
|
||||
)
|
||||
|
|
|
|||
|
|
@ -178,7 +178,7 @@ func senderHTLCScript(absoluteTimeout, relativeTimeout uint32, senderKey,
|
|||
// Alternatively, the receiver can place a 0 as the second item of the
|
||||
// witness stack if they wish to claim the HTLC with the proper
|
||||
// pre-image as normal. In order to prevent an over-sized pre-image
|
||||
// attack (which can create undesirable redemption asymmerties, we
|
||||
// attack (which can create undesirable redemption asymmerties), we
|
||||
// strongly require that all HTLC pre-images are exactly 32 bytes.
|
||||
builder.AddOp(txscript.OP_ELSE)
|
||||
builder.AddOp(txscript.OP_SIZE)
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user