4123 lines
141 KiB
Go
4123 lines
141 KiB
Go
package lnwallet
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import (
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"bytes"
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"crypto/sha256"
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"errors"
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"fmt"
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"io/ioutil"
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"math/rand"
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"os"
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"reflect"
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"runtime"
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"sync"
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"testing"
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"time"
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"github.com/davecgh/go-spew/spew"
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"github.com/lightningnetwork/lnd/chainntnfs"
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"github.com/lightningnetwork/lnd/channeldb"
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"github.com/lightningnetwork/lnd/lnwire"
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"github.com/lightningnetwork/lnd/shachain"
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"github.com/roasbeef/btcd/blockchain"
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"github.com/roasbeef/btcd/btcec"
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"github.com/roasbeef/btcd/chaincfg/chainhash"
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"github.com/roasbeef/btcd/txscript"
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"github.com/roasbeef/btcd/wire"
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"github.com/roasbeef/btcutil"
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)
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var (
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privPass = []byte("private-test")
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// For simplicity a single priv key controls all of our test outputs.
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testWalletPrivKey = []byte{
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0x2b, 0xd8, 0x06, 0xc9, 0x7f, 0x0e, 0x00, 0xaf,
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0x1a, 0x1f, 0xc3, 0x32, 0x8f, 0xa7, 0x63, 0xa9,
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0x26, 0x97, 0x23, 0xc8, 0xdb, 0x8f, 0xac, 0x4f,
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0x93, 0xaf, 0x71, 0xdb, 0x18, 0x6d, 0x6e, 0x90,
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}
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// We're alice :)
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bobsPrivKey = []byte{
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0x81, 0xb6, 0x37, 0xd8, 0xfc, 0xd2, 0xc6, 0xda,
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0x63, 0x59, 0xe6, 0x96, 0x31, 0x13, 0xa1, 0x17,
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0xd, 0xe7, 0x95, 0xe4, 0xb7, 0x25, 0xb8, 0x4d,
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0x1e, 0xb, 0x4c, 0xfd, 0x9e, 0xc5, 0x8c, 0xe9,
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}
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// Use a hard-coded HD seed.
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testHdSeed = chainhash.Hash{
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0xb7, 0x94, 0x38, 0x5f, 0x2d, 0x1e, 0xf7, 0xab,
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0x4d, 0x92, 0x73, 0xd1, 0x90, 0x63, 0x81, 0xb4,
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0x4f, 0x2f, 0x6f, 0x25, 0x88, 0xa3, 0xef, 0xb9,
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0x6a, 0x49, 0x18, 0x83, 0x31, 0x98, 0x47, 0x53,
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}
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// The number of confirmations required to consider any created channel
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// open.
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numReqConfs = uint16(1)
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)
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type mockSigner struct {
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key *btcec.PrivateKey
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}
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func (m *mockSigner) SignOutputRaw(tx *wire.MsgTx, signDesc *SignDescriptor) ([]byte, error) {
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amt := signDesc.Output.Value
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witnessScript := signDesc.WitnessScript
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privKey := m.key
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if !privKey.PubKey().IsEqual(signDesc.PubKey) {
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return nil, fmt.Errorf("incorrect key passed")
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}
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switch {
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case signDesc.SingleTweak != nil:
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privKey = TweakPrivKey(privKey,
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signDesc.SingleTweak)
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case signDesc.DoubleTweak != nil:
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privKey = DeriveRevocationPrivKey(privKey,
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signDesc.DoubleTweak)
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}
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sig, err := txscript.RawTxInWitnessSignature(tx, signDesc.SigHashes,
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signDesc.InputIndex, amt, witnessScript, signDesc.HashType,
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privKey)
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if err != nil {
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return nil, err
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}
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return sig[:len(sig)-1], nil
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}
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func (m *mockSigner) ComputeInputScript(tx *wire.MsgTx, signDesc *SignDescriptor) (*InputScript, error) {
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// TODO(roasbeef): expose tweaked signer from lnwallet so don't need to
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// duplicate this code?
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privKey := m.key
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switch {
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case signDesc.SingleTweak != nil:
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privKey = TweakPrivKey(privKey,
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signDesc.SingleTweak)
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case signDesc.DoubleTweak != nil:
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privKey = DeriveRevocationPrivKey(privKey,
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signDesc.DoubleTweak)
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}
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witnessScript, err := txscript.WitnessSignature(tx, signDesc.SigHashes,
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signDesc.InputIndex, signDesc.Output.Value, signDesc.Output.PkScript,
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signDesc.HashType, privKey, true)
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if err != nil {
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return nil, err
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}
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return &InputScript{
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Witness: witnessScript,
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}, nil
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}
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type mockNotfier struct {
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}
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func (m *mockNotfier) RegisterConfirmationsNtfn(txid *chainhash.Hash, numConfs, heightHint uint32) (*chainntnfs.ConfirmationEvent, error) {
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return nil, nil
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}
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func (m *mockNotfier) RegisterBlockEpochNtfn() (*chainntnfs.BlockEpochEvent, error) {
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return nil, nil
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}
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func (m *mockNotfier) Start() error {
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return nil
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}
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func (m *mockNotfier) Stop() error {
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return nil
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}
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func (m *mockNotfier) RegisterSpendNtfn(outpoint *wire.OutPoint, heightHint uint32) (*chainntnfs.SpendEvent, error) {
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return &chainntnfs.SpendEvent{
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Spend: make(chan *chainntnfs.SpendDetail),
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Cancel: func() {
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},
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}, nil
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}
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// mockSpendNotifier extends the mockNotifier so that spend notifications can be
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// triggered and delivered to subscribers.
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type mockSpendNotifier struct {
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*mockNotfier
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spendMap map[wire.OutPoint][]chan *chainntnfs.SpendDetail
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}
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func makeMockSpendNotifier() *mockSpendNotifier {
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return &mockSpendNotifier{
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spendMap: make(map[wire.OutPoint][]chan *chainntnfs.SpendDetail),
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}
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}
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func (m *mockSpendNotifier) RegisterSpendNtfn(outpoint *wire.OutPoint,
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heightHint uint32) (*chainntnfs.SpendEvent, error) {
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spendChan := make(chan *chainntnfs.SpendDetail, 1)
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m.spendMap[*outpoint] = append(m.spendMap[*outpoint], spendChan)
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return &chainntnfs.SpendEvent{
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Spend: spendChan,
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Cancel: func() {
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},
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}, nil
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}
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// Spend dispatches SpendDetails to all subscribers of the outpoint. The details
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// will include the transaction and height provided by the caller.
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func (m *mockSpendNotifier) Spend(outpoint *wire.OutPoint, height int32,
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txn *wire.MsgTx) {
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if spendChans, ok := m.spendMap[*outpoint]; ok {
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delete(m.spendMap, *outpoint)
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for _, spendChan := range spendChans {
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txnHash := txn.TxHash()
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spendChan <- &chainntnfs.SpendDetail{
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SpentOutPoint: outpoint,
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SpendingHeight: height,
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SpendingTx: txn,
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SpenderTxHash: &txnHash,
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SpenderInputIndex: outpoint.Index,
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}
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}
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}
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}
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// initRevocationWindows simulates a new channel being opened within the p2p
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// network by populating the initial revocation windows of the passed
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// commitment state machines.
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//
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// TODO(roasbeef): rename!
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func initRevocationWindows(chanA, chanB *LightningChannel, windowSize int) error {
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aliceNextRevoke, err := chanA.NextRevocationKey()
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if err != nil {
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return err
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}
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if err := chanB.InitNextRevocation(aliceNextRevoke); err != nil {
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return err
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}
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bobNextRevoke, err := chanB.NextRevocationKey()
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if err != nil {
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return err
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}
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if err := chanA.InitNextRevocation(bobNextRevoke); err != nil {
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return err
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}
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return nil
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}
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// forceStateTransition executes the necessary interaction between the two
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// commitment state machines to transition to a new state locking in any
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// pending updates.
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func forceStateTransition(chanA, chanB *LightningChannel) error {
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aliceSig, aliceHtlcSigs, err := chanA.SignNextCommitment()
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if err != nil {
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return err
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}
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if err = chanB.ReceiveNewCommitment(aliceSig, aliceHtlcSigs); err != nil {
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return err
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}
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bobRevocation, err := chanB.RevokeCurrentCommitment()
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if err != nil {
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return err
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}
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bobSig, bobHtlcSigs, err := chanB.SignNextCommitment()
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if err != nil {
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return err
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}
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if _, err := chanA.ReceiveRevocation(bobRevocation); err != nil {
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return err
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}
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if err := chanA.ReceiveNewCommitment(bobSig, bobHtlcSigs); err != nil {
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return err
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}
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aliceRevocation, err := chanA.RevokeCurrentCommitment()
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if err != nil {
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return err
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}
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if _, err := chanB.ReceiveRevocation(aliceRevocation); err != nil {
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return err
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}
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return nil
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}
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// createSpendableTestChannels initializes a pair of channels using a
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// mockSpendNotifier. This allows us to test the behavior of the closeObserver,
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// which is activated when the funding transaction is spent.
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func createSpendableTestChannels(revocationWindow int) (*LightningChannel,
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*LightningChannel, *mockSpendNotifier, func(), error) {
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notifier := makeMockSpendNotifier()
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alice, bob, cleanup, err := createTestChannelsWithNotifier(
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revocationWindow, notifier,
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)
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return alice, bob, notifier, cleanup, err
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}
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// createTestChannels initializes a pair of channels using a mock notifier.
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func createTestChannels(revocationWindow int) (*LightningChannel,
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*LightningChannel, func(), error) {
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notifier := &mockNotfier{}
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return createTestChannelsWithNotifier(revocationWindow, notifier)
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}
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// createTestChannelsWithNotifier creates two test lightning channels using the
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// provided notifier. The channel itself is funded with 10 BTC, with 5 BTC
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// allocated to each side. Within the channel, Alice is the initiator.
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func createTestChannelsWithNotifier(revocationWindow int,
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notifier chainntnfs.ChainNotifier) (*LightningChannel,
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*LightningChannel, func(), error) {
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aliceKeyPriv, aliceKeyPub := btcec.PrivKeyFromBytes(btcec.S256(),
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testWalletPrivKey)
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bobKeyPriv, bobKeyPub := btcec.PrivKeyFromBytes(btcec.S256(),
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bobsPrivKey)
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channelCapacity := btcutil.Amount(10 * 1e8)
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channelBal := channelCapacity / 2
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aliceDustLimit := btcutil.Amount(200)
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bobDustLimit := btcutil.Amount(1300)
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csvTimeoutAlice := uint32(5)
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csvTimeoutBob := uint32(4)
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prevOut := &wire.OutPoint{
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Hash: chainhash.Hash(testHdSeed),
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Index: 0,
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}
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fundingTxIn := wire.NewTxIn(prevOut, nil, nil)
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// TODO(roasbeef): use distinct keys
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aliceCfg := channeldb.ChannelConfig{
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ChannelConstraints: channeldb.ChannelConstraints{
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DustLimit: aliceDustLimit,
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MaxPendingAmount: lnwire.MilliSatoshi(rand.Int63()),
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ChanReserve: channelCapacity / 100,
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MinHTLC: lnwire.MilliSatoshi(rand.Int63()),
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MaxAcceptedHtlcs: uint16(rand.Int31()),
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},
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CsvDelay: uint16(csvTimeoutAlice),
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MultiSigKey: aliceKeyPub,
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RevocationBasePoint: aliceKeyPub,
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PaymentBasePoint: aliceKeyPub,
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DelayBasePoint: aliceKeyPub,
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HtlcBasePoint: aliceKeyPub,
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}
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bobCfg := channeldb.ChannelConfig{
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ChannelConstraints: channeldb.ChannelConstraints{
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DustLimit: bobDustLimit,
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MaxPendingAmount: lnwire.MilliSatoshi(rand.Int63()),
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ChanReserve: channelCapacity / 100,
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MinHTLC: lnwire.MilliSatoshi(rand.Int63()),
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MaxAcceptedHtlcs: uint16(rand.Int31()),
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},
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CsvDelay: uint16(csvTimeoutBob),
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MultiSigKey: bobKeyPub,
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RevocationBasePoint: bobKeyPub,
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PaymentBasePoint: bobKeyPub,
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DelayBasePoint: bobKeyPub,
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HtlcBasePoint: bobKeyPub,
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}
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bobRoot := DeriveRevocationRoot(bobKeyPriv, testHdSeed, aliceKeyPub)
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bobPreimageProducer := shachain.NewRevocationProducer(bobRoot)
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bobFirstRevoke, err := bobPreimageProducer.AtIndex(0)
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if err != nil {
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return nil, nil, nil, err
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}
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bobCommitPoint := ComputeCommitmentPoint(bobFirstRevoke[:])
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aliceRoot := DeriveRevocationRoot(aliceKeyPriv, testHdSeed, bobKeyPub)
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alicePreimageProducer := shachain.NewRevocationProducer(aliceRoot)
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aliceFirstRevoke, err := alicePreimageProducer.AtIndex(0)
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if err != nil {
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return nil, nil, nil, err
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}
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aliceCommitPoint := ComputeCommitmentPoint(aliceFirstRevoke[:])
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aliceCommitTx, bobCommitTx, err := CreateCommitmentTxns(channelBal,
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channelBal, &aliceCfg, &bobCfg, aliceCommitPoint, bobCommitPoint,
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*fundingTxIn)
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if err != nil {
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return nil, nil, nil, err
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}
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alicePath, err := ioutil.TempDir("", "alicedb")
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dbAlice, err := channeldb.Open(alicePath)
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if err != nil {
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return nil, nil, nil, err
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}
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bobPath, err := ioutil.TempDir("", "bobdb")
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dbBob, err := channeldb.Open(bobPath)
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if err != nil {
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return nil, nil, nil, err
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}
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estimator := &StaticFeeEstimator{24}
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feePerWeight, err := estimator.EstimateFeePerWeight(1)
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if err != nil {
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return nil, nil, nil, err
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}
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feePerKw := feePerWeight * 1000
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commitFee := calcStaticFee(0)
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aliceCommit := channeldb.ChannelCommitment{
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CommitHeight: 0,
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LocalBalance: lnwire.NewMSatFromSatoshis(channelBal - commitFee),
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RemoteBalance: lnwire.NewMSatFromSatoshis(channelBal),
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CommitFee: commitFee,
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FeePerKw: feePerKw,
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CommitTx: aliceCommitTx,
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CommitSig: bytes.Repeat([]byte{1}, 71),
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}
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bobCommit := channeldb.ChannelCommitment{
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CommitHeight: 0,
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LocalBalance: lnwire.NewMSatFromSatoshis(channelBal),
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RemoteBalance: lnwire.NewMSatFromSatoshis(channelBal - commitFee),
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CommitFee: commitFee,
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FeePerKw: feePerKw,
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CommitTx: bobCommitTx,
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CommitSig: bytes.Repeat([]byte{1}, 71),
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}
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aliceChannelState := &channeldb.OpenChannel{
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LocalChanCfg: aliceCfg,
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RemoteChanCfg: bobCfg,
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IdentityPub: aliceKeyPub,
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FundingOutpoint: *prevOut,
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ChanType: channeldb.SingleFunder,
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IsInitiator: true,
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Capacity: channelCapacity,
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RemoteCurrentRevocation: bobCommitPoint,
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RevocationProducer: alicePreimageProducer,
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RevocationStore: shachain.NewRevocationStore(),
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LocalCommitment: aliceCommit,
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RemoteCommitment: aliceCommit,
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Db: dbAlice,
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}
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bobChannelState := &channeldb.OpenChannel{
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LocalChanCfg: bobCfg,
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RemoteChanCfg: aliceCfg,
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IdentityPub: bobKeyPub,
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FundingOutpoint: *prevOut,
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ChanType: channeldb.SingleFunder,
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IsInitiator: false,
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Capacity: channelCapacity,
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RemoteCurrentRevocation: aliceCommitPoint,
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RevocationProducer: bobPreimageProducer,
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RevocationStore: shachain.NewRevocationStore(),
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LocalCommitment: bobCommit,
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RemoteCommitment: bobCommit,
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Db: dbBob,
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}
|
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|
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aliceSigner := &mockSigner{aliceKeyPriv}
|
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bobSigner := &mockSigner{bobKeyPriv}
|
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|
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channelAlice, err := NewLightningChannel(aliceSigner, notifier,
|
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estimator, aliceChannelState)
|
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if err != nil {
|
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return nil, nil, nil, err
|
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}
|
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channelBob, err := NewLightningChannel(bobSigner, notifier,
|
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estimator, bobChannelState)
|
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if err != nil {
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return nil, nil, nil, err
|
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}
|
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|
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if err := channelAlice.channelState.FullSync(); err != nil {
|
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return nil, nil, nil, err
|
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}
|
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if err := channelBob.channelState.FullSync(); err != nil {
|
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return nil, nil, nil, err
|
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}
|
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|
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cleanUpFunc := func() {
|
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os.RemoveAll(bobPath)
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os.RemoveAll(alicePath)
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|
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channelAlice.Stop()
|
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channelBob.Stop()
|
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}
|
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|
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// Now that the channel are open, simulate the start of a session by
|
|
// having Alice and Bob extend their revocation windows to each other.
|
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err = initRevocationWindows(channelAlice, channelBob, revocationWindow)
|
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if err != nil {
|
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return nil, nil, nil, err
|
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}
|
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|
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return channelAlice, channelBob, cleanUpFunc, nil
|
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}
|
|
|
|
// 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
|
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feePerKw = btcutil.Amount(24/4) * 1000
|
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)
|
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return feePerKw * (commitWeight +
|
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btcutil.Amount(htlcWeight*numHTLCs)) / 1000
|
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}
|
|
|
|
// createHTLC is a utility function for generating an HTLC with a given
|
|
// preimage and a given amount.
|
|
func createHTLC(id int, amount lnwire.MilliSatoshi) (*lnwire.UpdateAddHTLC, [32]byte) {
|
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preimage := bytes.Repeat([]byte{byte(id)}, 32)
|
|
paymentHash := sha256.Sum256(preimage)
|
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|
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var returnPreimage [32]byte
|
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copy(returnPreimage[:], preimage)
|
|
|
|
return &lnwire.UpdateAddHTLC{
|
|
ID: uint64(id),
|
|
PaymentHash: paymentHash,
|
|
Amount: amount,
|
|
Expiry: uint32(5),
|
|
}, returnPreimage
|
|
}
|
|
|
|
func assertOutputExistsByValue(t *testing.T, commitTx *wire.MsgTx,
|
|
value btcutil.Amount) {
|
|
|
|
for _, txOut := range commitTx.TxOut {
|
|
if txOut.Value == int64(value) {
|
|
return
|
|
}
|
|
}
|
|
|
|
t.Fatalf("unable to find output of value %v within tx %v", value,
|
|
spew.Sdump(commitTx))
|
|
}
|
|
|
|
// TestSimpleAddSettleWorkflow tests a simple channel scenario wherein the
|
|
// local node (Alice in this case) creates a new outgoing HTLC to bob, commits
|
|
// this change, then bob immediately commits a settlement of the HTLC after the
|
|
// initial add is fully committed in both commit chains.
|
|
//
|
|
// TODO(roasbeef): write higher level framework to exercise various states of
|
|
// the state machine
|
|
// * DSL language perhaps?
|
|
// * constructed via input/output files
|
|
func TestSimpleAddSettleWorkflow(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
// Create a test channel which will be used for the duration of this
|
|
// unittest. The channel will be funded evenly with Alice having 5 BTC,
|
|
// and Bob having 5 BTC.
|
|
aliceChannel, bobChannel, cleanUp, err := createTestChannels(1)
|
|
if err != nil {
|
|
t.Fatalf("unable to create test channels: %v", err)
|
|
}
|
|
defer cleanUp()
|
|
|
|
paymentPreimage := bytes.Repeat([]byte{1}, 32)
|
|
paymentHash := sha256.Sum256(paymentPreimage)
|
|
htlcAmt := lnwire.NewMSatFromSatoshis(btcutil.SatoshiPerBitcoin)
|
|
htlc := &lnwire.UpdateAddHTLC{
|
|
PaymentHash: paymentHash,
|
|
Amount: htlcAmt,
|
|
Expiry: uint32(5),
|
|
}
|
|
|
|
// First Alice adds the outgoing HTLC to her local channel's state
|
|
// update log. Then Alice sends this wire message over to Bob who adds
|
|
// this htlc to his remote state update log.
|
|
aliceHtlcIndex, err := aliceChannel.AddHTLC(htlc)
|
|
if err != nil {
|
|
t.Fatalf("unable to add htlc: %v", err)
|
|
}
|
|
|
|
bobHtlcIndex, err := bobChannel.ReceiveHTLC(htlc)
|
|
if err != nil {
|
|
t.Fatalf("unable to recv htlc: %v", err)
|
|
}
|
|
|
|
// Next alice commits this change by sending a signature message. Since
|
|
// we expect the messages to be ordered, Bob will receive the HTLC we
|
|
// just sent before he receives this signature, so the signature will
|
|
// cover the HTLC.
|
|
aliceSig, aliceHtlcSigs, err := aliceChannel.SignNextCommitment()
|
|
if err != nil {
|
|
t.Fatalf("alice unable to sign commitment: %v", err)
|
|
}
|
|
|
|
// Bob receives this signature message, and checks that this covers the
|
|
// state he has in his remote log. This includes the HTLC just sent
|
|
// from Alice.
|
|
err = bobChannel.ReceiveNewCommitment(aliceSig, aliceHtlcSigs)
|
|
if err != nil {
|
|
t.Fatalf("bob unable to process alice's new commitment: %v", err)
|
|
}
|
|
|
|
// Bob revokes his prior commitment given to him by Alice, since he now
|
|
// has a valid signature for a newer commitment.
|
|
bobRevocation, err := bobChannel.RevokeCurrentCommitment()
|
|
if err != nil {
|
|
t.Fatalf("unable to generate bob revocation: %v", err)
|
|
}
|
|
|
|
// Bob finally send a signature for Alice's commitment transaction.
|
|
// This signature will cover the HTLC, since Bob will first send the
|
|
// revocation just created. The revocation also acks every received
|
|
// HTLC up to the point where Alice sent here signature.
|
|
bobSig, bobHtlcSigs, err := bobChannel.SignNextCommitment()
|
|
if err != nil {
|
|
t.Fatalf("bob unable to sign alice's commitment: %v", err)
|
|
}
|
|
|
|
// Alice then processes this revocation, sending her own revocation for
|
|
// her prior commitment transaction. Alice shouldn't have any HTLCs to
|
|
// forward since she's sending an outgoing HTLC.
|
|
if htlcs, err := aliceChannel.ReceiveRevocation(bobRevocation); err != nil {
|
|
t.Fatalf("alice unable to process bob's revocation: %v", err)
|
|
} else if len(htlcs) != 0 {
|
|
t.Fatalf("alice forwards %v htlcs, should forward none: ", len(htlcs))
|
|
}
|
|
|
|
// Alice then processes bob's signature, and since she just received
|
|
// the revocation, she expect this signature to cover everything up to
|
|
// the point where she sent her signature, including the HTLC.
|
|
err = aliceChannel.ReceiveNewCommitment(bobSig, bobHtlcSigs)
|
|
if err != nil {
|
|
t.Fatalf("alice unable to process bob's new commitment: %v", err)
|
|
}
|
|
|
|
// Alice then generates a revocation for bob.
|
|
aliceRevocation, err := aliceChannel.RevokeCurrentCommitment()
|
|
if err != nil {
|
|
t.Fatalf("unable to revoke alice channel: %v", err)
|
|
}
|
|
|
|
// Finally Bob processes Alice's revocation, at this point the new HTLC
|
|
// is fully locked in within both commitment transactions. Bob should
|
|
// also be able to forward an HTLC now that the HTLC has been locked
|
|
// into both commitment transactions.
|
|
if htlcs, err := bobChannel.ReceiveRevocation(aliceRevocation); err != nil {
|
|
t.Fatalf("bob unable to process alice's revocation: %v", err)
|
|
} else if len(htlcs) != 1 {
|
|
t.Fatalf("bob should be able to forward an HTLC, instead can "+
|
|
"forward %v", len(htlcs))
|
|
}
|
|
|
|
// At this point, both sides should have the proper number of satoshis
|
|
// sent, and commitment height updated within their local channel
|
|
// state.
|
|
aliceSent := lnwire.MilliSatoshi(0)
|
|
bobSent := lnwire.MilliSatoshi(0)
|
|
|
|
if aliceChannel.channelState.TotalMSatSent != aliceSent {
|
|
t.Fatalf("alice has incorrect milli-satoshis sent: %v vs %v",
|
|
aliceChannel.channelState.TotalMSatSent, aliceSent)
|
|
}
|
|
if aliceChannel.channelState.TotalMSatReceived != bobSent {
|
|
t.Fatalf("alice has incorrect milli-satoshis received %v vs %v",
|
|
aliceChannel.channelState.TotalMSatReceived, bobSent)
|
|
}
|
|
if bobChannel.channelState.TotalMSatSent != bobSent {
|
|
t.Fatalf("bob has incorrect milli-satoshis sent %v vs %v",
|
|
bobChannel.channelState.TotalMSatSent, bobSent)
|
|
}
|
|
if bobChannel.channelState.TotalMSatReceived != aliceSent {
|
|
t.Fatalf("bob has incorrect milli-satoshis received %v vs %v",
|
|
bobChannel.channelState.TotalMSatReceived, aliceSent)
|
|
}
|
|
if bobChannel.currentHeight != 1 {
|
|
t.Fatalf("bob has incorrect commitment height, %v vs %v",
|
|
bobChannel.currentHeight, 1)
|
|
}
|
|
if aliceChannel.currentHeight != 1 {
|
|
t.Fatalf("alice has incorrect commitment height, %v vs %v",
|
|
aliceChannel.currentHeight, 1)
|
|
}
|
|
|
|
// Both commitment transactions should have three outputs, and one of
|
|
// them should be exactly the amount of the HTLC.
|
|
if len(aliceChannel.channelState.LocalCommitment.CommitTx.TxOut) != 3 {
|
|
t.Fatalf("alice should have three commitment outputs, instead "+
|
|
"have %v",
|
|
len(aliceChannel.channelState.LocalCommitment.CommitTx.TxOut))
|
|
}
|
|
if len(bobChannel.channelState.LocalCommitment.CommitTx.TxOut) != 3 {
|
|
t.Fatalf("bob should have three commitment outputs, instead "+
|
|
"have %v",
|
|
len(bobChannel.channelState.LocalCommitment.CommitTx.TxOut))
|
|
}
|
|
assertOutputExistsByValue(t,
|
|
aliceChannel.channelState.LocalCommitment.CommitTx,
|
|
htlcAmt.ToSatoshis())
|
|
assertOutputExistsByValue(t,
|
|
bobChannel.channelState.LocalCommitment.CommitTx,
|
|
htlcAmt.ToSatoshis())
|
|
|
|
// Now we'll repeat a similar exchange, this time with Bob settling the
|
|
// HTLC once he learns of the preimage.
|
|
var preimage [32]byte
|
|
copy(preimage[:], paymentPreimage)
|
|
err = bobChannel.SettleHTLC(preimage, bobHtlcIndex)
|
|
if err != nil {
|
|
t.Fatalf("bob unable to settle inbound htlc: %v", err)
|
|
}
|
|
|
|
err = aliceChannel.ReceiveHTLCSettle(preimage, aliceHtlcIndex)
|
|
if err != nil {
|
|
t.Fatalf("alice unable to accept settle of outbound htlc: %v", err)
|
|
}
|
|
|
|
bobSig2, bobHtlcSigs2, err := bobChannel.SignNextCommitment()
|
|
if err != nil {
|
|
t.Fatalf("bob unable to sign settle commitment: %v", err)
|
|
}
|
|
err = aliceChannel.ReceiveNewCommitment(bobSig2, bobHtlcSigs2)
|
|
if err != nil {
|
|
t.Fatalf("alice unable to process bob's new commitment: %v", err)
|
|
}
|
|
|
|
aliceRevocation2, err := aliceChannel.RevokeCurrentCommitment()
|
|
if err != nil {
|
|
t.Fatalf("alice unable to generate revocation: %v", err)
|
|
}
|
|
aliceSig2, aliceHtlcSigs2, err := aliceChannel.SignNextCommitment()
|
|
if err != nil {
|
|
t.Fatalf("alice unable to sign new commitment: %v", err)
|
|
}
|
|
|
|
if htlcs, err := bobChannel.ReceiveRevocation(aliceRevocation2); err != nil {
|
|
t.Fatalf("bob unable to process alice's revocation: %v", err)
|
|
} else if len(htlcs) != 0 {
|
|
t.Fatalf("bob shouldn't forward any HTLCs after outgoing settle, "+
|
|
"instead can forward: %v", spew.Sdump(htlcs))
|
|
}
|
|
err = bobChannel.ReceiveNewCommitment(aliceSig2, aliceHtlcSigs2)
|
|
if err != nil {
|
|
t.Fatalf("bob unable to process alice's new commitment: %v", err)
|
|
}
|
|
|
|
bobRevocation2, err := bobChannel.RevokeCurrentCommitment()
|
|
if err != nil {
|
|
t.Fatalf("bob unable to revoke commitment: %v", err)
|
|
}
|
|
|
|
if htlcs, err := aliceChannel.ReceiveRevocation(bobRevocation2); err != nil {
|
|
t.Fatalf("alice unable to process bob's revocation: %v", err)
|
|
} else if len(htlcs) != 1 {
|
|
// Alice should now be able to forward the settlement HTLC to
|
|
// any down stream peers.
|
|
t.Fatalf("alice should be able to forward a single HTLC, "+
|
|
"instead can forward %v: %v", len(htlcs), spew.Sdump(htlcs))
|
|
}
|
|
|
|
// At this point, Bob should have 6 BTC settled, with Alice still having
|
|
// 4 BTC. Alice's channel should show 1 BTC sent and Bob's channel
|
|
// should show 1 BTC received. They should also be at commitment height
|
|
// two, with the revocation window extended by by 1 (5).
|
|
mSatTransferred := lnwire.NewMSatFromSatoshis(btcutil.SatoshiPerBitcoin)
|
|
if aliceChannel.channelState.TotalMSatSent != mSatTransferred {
|
|
t.Fatalf("alice satoshis sent incorrect %v vs %v expected",
|
|
aliceChannel.channelState.TotalMSatSent,
|
|
mSatTransferred)
|
|
}
|
|
if aliceChannel.channelState.TotalMSatReceived != 0 {
|
|
t.Fatalf("alice satoshis received incorrect %v vs %v expected",
|
|
aliceChannel.channelState.TotalMSatReceived, 0)
|
|
}
|
|
if bobChannel.channelState.TotalMSatReceived != mSatTransferred {
|
|
t.Fatalf("bob satoshis received incorrect %v vs %v expected",
|
|
bobChannel.channelState.TotalMSatReceived,
|
|
mSatTransferred)
|
|
}
|
|
if bobChannel.channelState.TotalMSatSent != 0 {
|
|
t.Fatalf("bob satoshis sent incorrect %v vs %v expected",
|
|
bobChannel.channelState.TotalMSatSent, 0)
|
|
}
|
|
if bobChannel.currentHeight != 2 {
|
|
t.Fatalf("bob has incorrect commitment height, %v vs %v",
|
|
bobChannel.currentHeight, 2)
|
|
}
|
|
if aliceChannel.currentHeight != 2 {
|
|
t.Fatalf("alice has incorrect commitment height, %v vs %v",
|
|
aliceChannel.currentHeight, 2)
|
|
}
|
|
|
|
// The logs of both sides should now be cleared since the entry adding
|
|
// the HTLC should have been removed once both sides receive the
|
|
// revocation.
|
|
if aliceChannel.localUpdateLog.Len() != 0 {
|
|
t.Fatalf("alice's local not updated, should be empty, has %v "+
|
|
"entries instead", aliceChannel.localUpdateLog.Len())
|
|
}
|
|
if aliceChannel.remoteUpdateLog.Len() != 0 {
|
|
t.Fatalf("alice's remote not updated, should be empty, has %v "+
|
|
"entries instead", aliceChannel.remoteUpdateLog.Len())
|
|
}
|
|
if len(aliceChannel.localUpdateLog.updateIndex) != 0 {
|
|
t.Fatalf("alice's local log index not cleared, should be empty but "+
|
|
"has %v entries", len(aliceChannel.localUpdateLog.updateIndex))
|
|
}
|
|
if len(aliceChannel.remoteUpdateLog.updateIndex) != 0 {
|
|
t.Fatalf("alice's remote log index not cleared, should be empty but "+
|
|
"has %v entries", len(aliceChannel.remoteUpdateLog.updateIndex))
|
|
}
|
|
}
|
|
|
|
// TestCheckCommitTxSize checks that estimation size of commitment
|
|
// transaction with some degree of error corresponds to the actual size.
|
|
func TestCheckCommitTxSize(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
checkSize := func(channel *LightningChannel, count int) {
|
|
// Due to variable size of the signatures (70-73) in
|
|
// witness script actual size of commitment transaction might
|
|
// be lower on 6 weight.
|
|
BaseCommitmentTxSizeEstimationError := 6
|
|
|
|
commitTx, err := channel.getSignedCommitTx()
|
|
if err != nil {
|
|
t.Fatalf("unable to initiate alice force close: %v", err)
|
|
}
|
|
|
|
actualCost := blockchain.GetTransactionWeight(btcutil.NewTx(commitTx))
|
|
estimatedCost := estimateCommitTxWeight(count, false)
|
|
|
|
diff := int(estimatedCost - actualCost)
|
|
if 0 > diff || BaseCommitmentTxSizeEstimationError < diff {
|
|
t.Fatalf("estimation is wrong, diff: %v", diff)
|
|
}
|
|
|
|
}
|
|
|
|
// Create a test channel which will be used for the duration of this
|
|
// unittest. The channel will be funded evenly with Alice having 5 BTC,
|
|
// and Bob having 5 BTC.
|
|
aliceChannel, bobChannel, cleanUp, err := createTestChannels(1)
|
|
if err != nil {
|
|
t.Fatalf("unable to create test channels: %v", err)
|
|
}
|
|
defer cleanUp()
|
|
|
|
// Check that weight estimation of the commitment transaction without
|
|
// HTLCs is right.
|
|
checkSize(aliceChannel, 0)
|
|
checkSize(bobChannel, 0)
|
|
|
|
// Adding HTLCs and check that size stays in allowable estimation
|
|
// error window.
|
|
for i := 0; i <= 10; i++ {
|
|
htlc, _ := createHTLC(i, lnwire.MilliSatoshi(1e7))
|
|
|
|
if _, err := aliceChannel.AddHTLC(htlc); err != nil {
|
|
t.Fatalf("alice unable to add htlc: %v", err)
|
|
}
|
|
if _, err := bobChannel.ReceiveHTLC(htlc); err != nil {
|
|
t.Fatalf("bob unable to receive htlc: %v", err)
|
|
}
|
|
|
|
if err := forceStateTransition(aliceChannel, bobChannel); err != nil {
|
|
t.Fatalf("unable to complete state update: %v", err)
|
|
}
|
|
checkSize(aliceChannel, i+1)
|
|
checkSize(bobChannel, i+1)
|
|
}
|
|
|
|
// Settle HTLCs and check that estimation is counting cost of settle
|
|
// HTLCs properly.
|
|
for i := 10; i >= 0; i-- {
|
|
_, preimage := createHTLC(i, lnwire.MilliSatoshi(1e7))
|
|
|
|
err := bobChannel.SettleHTLC(preimage, uint64(i))
|
|
if err != nil {
|
|
t.Fatalf("bob unable to settle inbound htlc: %v", err)
|
|
}
|
|
|
|
err = aliceChannel.ReceiveHTLCSettle(preimage, uint64(i))
|
|
if err != nil {
|
|
t.Fatalf("alice unable to accept settle of outbound htlc: %v", err)
|
|
}
|
|
|
|
if err := forceStateTransition(bobChannel, aliceChannel); err != nil {
|
|
t.Fatalf("unable to complete state update: %v", err)
|
|
}
|
|
checkSize(aliceChannel, i)
|
|
checkSize(bobChannel, i)
|
|
}
|
|
}
|
|
|
|
func TestCooperativeChannelClosure(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
// Create a test channel which will be used for the duration of this
|
|
// unittest. The channel will be funded evenly with Alice having 5 BTC,
|
|
// and Bob having 5 BTC.
|
|
aliceChannel, bobChannel, cleanUp, err := createTestChannels(1)
|
|
if err != nil {
|
|
t.Fatalf("unable to create test channels: %v", err)
|
|
}
|
|
defer cleanUp()
|
|
|
|
aliceDeliveryScript := bobsPrivKey[:]
|
|
bobDeliveryScript := testHdSeed[:]
|
|
|
|
aliceFeeRate := uint64(aliceChannel.channelState.LocalCommitment.FeePerKw)
|
|
bobFeeRate := uint64(bobChannel.channelState.LocalCommitment.FeePerKw)
|
|
|
|
// We'll store with both Alice and Bob creating a new close proposal
|
|
// with the same fee.
|
|
aliceFee := btcutil.Amount(aliceChannel.CalcFee(aliceFeeRate))
|
|
aliceSig, err := aliceChannel.CreateCloseProposal(
|
|
aliceFee, aliceDeliveryScript, bobDeliveryScript,
|
|
)
|
|
if err != nil {
|
|
t.Fatalf("unable to create alice coop close proposal: %v", err)
|
|
}
|
|
aliceCloseSig := append(aliceSig, byte(txscript.SigHashAll))
|
|
|
|
bobFee := btcutil.Amount(bobChannel.CalcFee(bobFeeRate))
|
|
bobSig, err := bobChannel.CreateCloseProposal(
|
|
bobFee, bobDeliveryScript, aliceDeliveryScript,
|
|
)
|
|
if err != nil {
|
|
t.Fatalf("unable to create bob coop close proposal: %v", err)
|
|
}
|
|
bobCloseSig := append(bobSig, byte(txscript.SigHashAll))
|
|
|
|
// With the proposals created, both sides should be able to properly
|
|
// process the other party's signature. This indicates that the
|
|
// transaction is well formed, and the signatures verify.
|
|
aliceCloseTx, _, err := bobChannel.CompleteCooperativeClose(
|
|
bobCloseSig, aliceCloseSig, bobDeliveryScript,
|
|
aliceDeliveryScript, bobFee)
|
|
if err != nil {
|
|
t.Fatalf("unable to complete alice cooperative close: %v", err)
|
|
}
|
|
bobCloseSha := aliceCloseTx.TxHash()
|
|
|
|
bobCloseTx, _, err := aliceChannel.CompleteCooperativeClose(
|
|
aliceCloseSig, bobCloseSig, aliceDeliveryScript,
|
|
bobDeliveryScript, aliceFee)
|
|
if err != nil {
|
|
t.Fatalf("unable to complete bob cooperative close: %v", err)
|
|
}
|
|
aliceCloseSha := bobCloseTx.TxHash()
|
|
|
|
if bobCloseSha != aliceCloseSha {
|
|
t.Fatalf("alice and bob close transactions don't match: %v", err)
|
|
}
|
|
}
|
|
|
|
// TestForceClose checks that the resulting ForceCloseSummary is correct when a
|
|
// peer is ForceClosing the channel. Will check outputs both above and below
|
|
// the dust limit.
|
|
func TestForceClose(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
// TODO(roasbeef): modify to add some HTLC's before closing?
|
|
|
|
// Create a test channel which will be used for the duration of this
|
|
// unittest. The channel will be funded evenly with Alice having 5 BTC,
|
|
// and Bob having 5 BTC.
|
|
aliceChannel, bobChannel, cleanUp, err := createTestChannels(3)
|
|
if err != nil {
|
|
t.Fatalf("unable to create test channels: %v", err)
|
|
}
|
|
defer cleanUp()
|
|
|
|
bobAmount := bobChannel.channelState.LocalCommitment.LocalBalance
|
|
|
|
// First, we'll add an outgoing HTLC from Alice to Bob, such that it
|
|
// will still be present within the broadcast commitment transaction.
|
|
// We'll ensure that the HTLC amount is above Alice's dust limit.
|
|
htlcAmount := lnwire.NewMSatFromSatoshis(20000)
|
|
htlc, _ := createHTLC(0, htlcAmount)
|
|
if _, err := aliceChannel.AddHTLC(htlc); err != nil {
|
|
t.Fatalf("alice unable to add htlc: %v", err)
|
|
}
|
|
if _, err := bobChannel.ReceiveHTLC(htlc); err != nil {
|
|
t.Fatalf("bob unable to recv add htlc: %v", err)
|
|
}
|
|
if err := forceStateTransition(aliceChannel, bobChannel); err != nil {
|
|
t.Fatalf("Can't update the channel state: %v", err)
|
|
}
|
|
|
|
// Now with the HTLC in tact, we'll perform a force close on Alice's
|
|
// part.
|
|
closeSummary, err := aliceChannel.ForceClose()
|
|
if err != nil {
|
|
t.Fatalf("unable to force close channel: %v", err)
|
|
}
|
|
|
|
// Alice's force close summary should have a single HTLC resolution.
|
|
if len(closeSummary.HtlcResolutions) != 1 {
|
|
t.Fatalf("alice htlc resolutions not populated: expected %v "+
|
|
"htlcs, got %v htlcs",
|
|
1, len(closeSummary.HtlcResolutions))
|
|
}
|
|
|
|
// The SelfOutputSignDesc should be non-nil since the output to-self is
|
|
// non-dust.
|
|
if closeSummary.SelfOutputSignDesc == nil {
|
|
t.Fatalf("alice fails to include to-self output in " +
|
|
"ForceCloseSummary")
|
|
}
|
|
|
|
// The rest of the close summary should have been populated properly.
|
|
aliceDelayPoint := aliceChannel.channelState.LocalChanCfg.DelayBasePoint
|
|
if !closeSummary.SelfOutputSignDesc.PubKey.IsEqual(aliceDelayPoint) {
|
|
t.Fatalf("alice incorrect pubkey in SelfOutputSignDesc")
|
|
}
|
|
|
|
// Factoring in the fee rate, Alice's amount should properly reflect
|
|
// that we've added an additional HTLC to the commitment transaction.
|
|
totalCommitWeight := CommitWeight + HtlcWeight
|
|
feePerKw := aliceChannel.channelState.LocalCommitment.FeePerKw
|
|
commitFee := btcutil.Amount((int64(feePerKw) * totalCommitWeight) / 1000)
|
|
expectedAmount := (aliceChannel.Capacity / 2) - htlcAmount.ToSatoshis() - commitFee
|
|
if closeSummary.SelfOutputSignDesc.Output.Value != int64(expectedAmount) {
|
|
t.Fatalf("alice incorrect output value in SelfOutputSignDesc, "+
|
|
"expected %v, got %v", int64(expectedAmount),
|
|
closeSummary.SelfOutputSignDesc.Output.Value)
|
|
}
|
|
|
|
// Alice's listed CSV delay should also match the delay that was
|
|
// pre-committed to at channel opening.
|
|
if closeSummary.SelfOutputMaturity !=
|
|
uint32(aliceChannel.localChanCfg.CsvDelay) {
|
|
|
|
t.Fatalf("alice: incorrect local CSV delay in ForceCloseSummary, "+
|
|
"expected %v, got %v",
|
|
aliceChannel.channelState.LocalChanCfg.CsvDelay,
|
|
closeSummary.SelfOutputMaturity)
|
|
}
|
|
|
|
// Next, we'll ensure that the second level HTLC transaction it itself
|
|
// spendable, and also that the delivery output (with delay) itself has
|
|
// a valid sign descriptor.
|
|
var senderHtlcPkScript []byte
|
|
for _, txOut := range closeSummary.CloseTx.TxOut {
|
|
if txOut.Value == int64(htlcAmount.ToSatoshis()) {
|
|
senderHtlcPkScript = txOut.PkScript
|
|
break
|
|
}
|
|
}
|
|
|
|
if senderHtlcPkScript == nil {
|
|
t.Fatalf("unable to find htlc script")
|
|
}
|
|
|
|
// First, verify that the second level transaction can properly spend
|
|
// the multi-sig clause within the
|
|
htlcResolution := closeSummary.HtlcResolutions[0]
|
|
timeoutTx := htlcResolution.SignedTimeoutTx
|
|
vm, err := txscript.NewEngine(senderHtlcPkScript,
|
|
timeoutTx, 0, txscript.StandardVerifyFlags, nil,
|
|
nil, int64(htlcAmount.ToSatoshis()))
|
|
if err != nil {
|
|
t.Fatalf("unable to create engine: %v", err)
|
|
}
|
|
if err := vm.Execute(); err != nil {
|
|
t.Fatalf("htlc timeout spend is invalid: %v", err)
|
|
}
|
|
|
|
// Next, we'll ensure that we can spend the output of the second level
|
|
// transaction given a properly crafted sweep transaction.
|
|
sweepTx := wire.NewMsgTx(2)
|
|
sweepTx.AddTxIn(&wire.TxIn{
|
|
PreviousOutPoint: wire.OutPoint{
|
|
Hash: htlcResolution.SignedTimeoutTx.TxHash(),
|
|
Index: 0,
|
|
},
|
|
})
|
|
sweepTx.AddTxOut(&wire.TxOut{
|
|
PkScript: senderHtlcPkScript,
|
|
Value: htlcResolution.SweepSignDesc.Output.Value,
|
|
})
|
|
htlcResolution.SweepSignDesc.InputIndex = 0
|
|
sweepTx.TxIn[0].Witness, err = htlcSpendSuccess(aliceChannel.signer,
|
|
&htlcResolution.SweepSignDesc, sweepTx,
|
|
uint32(aliceChannel.channelState.LocalChanCfg.CsvDelay))
|
|
if err != nil {
|
|
t.Fatalf("unable to gen witness for timeout output: %v", err)
|
|
}
|
|
|
|
// With the witness fully populated for the success spend from the
|
|
// second-level transaction, we ensure that the scripts properly
|
|
// validate given the information within the htlc resolution struct.
|
|
vm, err = txscript.NewEngine(
|
|
htlcResolution.SweepSignDesc.Output.PkScript,
|
|
sweepTx, 0, txscript.StandardVerifyFlags, nil,
|
|
nil, htlcResolution.SweepSignDesc.Output.Value,
|
|
)
|
|
if err != nil {
|
|
t.Fatalf("unable to create engine: %v", err)
|
|
}
|
|
if err := vm.Execute(); err != nil {
|
|
t.Fatalf("htlc timeout spend is invalid: %v", err)
|
|
}
|
|
|
|
// Finally, the txid of the commitment transaction and the one returned
|
|
// as the closing transaction should also match.
|
|
closeTxHash := closeSummary.CloseTx.TxHash()
|
|
commitTxHash := aliceChannel.channelState.LocalCommitment.CommitTx.TxHash()
|
|
if !bytes.Equal(closeTxHash[:], commitTxHash[:]) {
|
|
t.Fatalf("alice: incorrect close transaction txid")
|
|
}
|
|
|
|
// Check the same for Bob's ForceCloseSummary.
|
|
closeSummary, err = bobChannel.ForceClose()
|
|
if err != nil {
|
|
t.Fatalf("unable to force close channel: %v", err)
|
|
}
|
|
if closeSummary.SelfOutputSignDesc == nil {
|
|
t.Fatalf("bob fails to include to-self output in ForceCloseSummary")
|
|
}
|
|
bobDelayPoint := bobChannel.channelState.LocalChanCfg.DelayBasePoint
|
|
if !closeSummary.SelfOutputSignDesc.PubKey.IsEqual(bobDelayPoint) {
|
|
t.Fatalf("bob incorrect pubkey in SelfOutputSignDesc")
|
|
}
|
|
if closeSummary.SelfOutputSignDesc.Output.Value !=
|
|
int64(bobAmount.ToSatoshis()) {
|
|
|
|
t.Fatalf("bob incorrect output value in SelfOutputSignDesc, "+
|
|
"expected %v, got %v",
|
|
bobAmount.ToSatoshis(),
|
|
int64(closeSummary.SelfOutputSignDesc.Output.Value))
|
|
}
|
|
if closeSummary.SelfOutputMaturity !=
|
|
uint32(bobChannel.channelState.LocalChanCfg.CsvDelay) {
|
|
|
|
t.Fatalf("bob: incorrect local CSV delay in ForceCloseSummary, "+
|
|
"expected %v, got %v",
|
|
bobChannel.channelState.LocalChanCfg.CsvDelay,
|
|
closeSummary.SelfOutputMaturity)
|
|
}
|
|
|
|
closeTxHash = closeSummary.CloseTx.TxHash()
|
|
commitTxHash = bobChannel.channelState.LocalCommitment.CommitTx.TxHash()
|
|
if !bytes.Equal(closeTxHash[:], commitTxHash[:]) {
|
|
t.Fatalf("bob: incorrect close transaction txid")
|
|
}
|
|
}
|
|
|
|
// TestForceCloseDustOutput tests that if either side force closes with an
|
|
// active dust output (for only a single party due to asymmetric dust values),
|
|
// then the force close summary is well crafted.
|
|
func TestForceCloseDustOutput(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
// Create a test channel which will be used for the duration of this
|
|
// unittest. The channel will be funded evenly with Alice having 5 BTC,
|
|
// and Bob having 5 BTC.
|
|
aliceChannel, bobChannel, cleanUp, err := createTestChannels(3)
|
|
if err != nil {
|
|
t.Fatalf("unable to create test channels: %v", err)
|
|
}
|
|
defer cleanUp()
|
|
|
|
htlcAmount := lnwire.NewMSatFromSatoshis(500)
|
|
|
|
aliceAmount := aliceChannel.channelState.LocalCommitment.LocalBalance
|
|
bobAmount := bobChannel.channelState.LocalCommitment.LocalBalance
|
|
|
|
// Have Bobs' to-self output be below her dust limit and check
|
|
// ForceCloseSummary again on both peers.
|
|
htlc, preimage := createHTLC(0, bobAmount-htlcAmount)
|
|
bobHtlcIndex, err := bobChannel.AddHTLC(htlc)
|
|
if err != nil {
|
|
t.Fatalf("alice unable to add htlc: %v", err)
|
|
}
|
|
aliceHtlcIndex, err := aliceChannel.ReceiveHTLC(htlc)
|
|
if err != nil {
|
|
t.Fatalf("bob unable to receive htlc: %v", err)
|
|
}
|
|
if err := forceStateTransition(bobChannel, aliceChannel); err != nil {
|
|
t.Fatalf("Can't update the channel state: %v", err)
|
|
}
|
|
|
|
// Settle HTLC and sign new commitment.
|
|
err = aliceChannel.SettleHTLC(preimage, aliceHtlcIndex)
|
|
if err != nil {
|
|
t.Fatalf("bob unable to settle inbound htlc: %v", err)
|
|
}
|
|
err = bobChannel.ReceiveHTLCSettle(preimage, bobHtlcIndex)
|
|
if err != nil {
|
|
t.Fatalf("alice unable to accept settle of outbound htlc: %v", err)
|
|
}
|
|
if err := forceStateTransition(aliceChannel, bobChannel); err != nil {
|
|
t.Fatalf("Can't update the channel state: %v", err)
|
|
}
|
|
|
|
aliceAmount = aliceChannel.channelState.LocalCommitment.LocalBalance
|
|
bobAmount = bobChannel.channelState.LocalCommitment.RemoteBalance
|
|
|
|
closeSummary, err := aliceChannel.ForceClose()
|
|
if err != nil {
|
|
t.Fatalf("unable to force close channel: %v", err)
|
|
}
|
|
|
|
// Alice's to-self output should still be in the commitment
|
|
// transaction.
|
|
if closeSummary.SelfOutputSignDesc == nil {
|
|
t.Fatalf("alice fails to include to-self output in " +
|
|
"ForceCloseSummary")
|
|
}
|
|
if !closeSummary.SelfOutputSignDesc.PubKey.IsEqual(
|
|
aliceChannel.channelState.LocalChanCfg.DelayBasePoint,
|
|
) {
|
|
t.Fatalf("alice incorrect pubkey in SelfOutputSignDesc")
|
|
}
|
|
if closeSummary.SelfOutputSignDesc.Output.Value !=
|
|
int64(aliceAmount.ToSatoshis()) {
|
|
t.Fatalf("alice incorrect output value in SelfOutputSignDesc, "+
|
|
"expected %v, got %v",
|
|
aliceChannel.channelState.LocalCommitment.LocalBalance.ToSatoshis(),
|
|
closeSummary.SelfOutputSignDesc.Output.Value)
|
|
}
|
|
|
|
if closeSummary.SelfOutputMaturity !=
|
|
uint32(aliceChannel.channelState.LocalChanCfg.CsvDelay) {
|
|
t.Fatalf("alice: incorrect local CSV delay in ForceCloseSummary, "+
|
|
"expected %v, got %v",
|
|
aliceChannel.channelState.LocalChanCfg.CsvDelay,
|
|
closeSummary.SelfOutputMaturity)
|
|
}
|
|
|
|
closeTxHash := closeSummary.CloseTx.TxHash()
|
|
commitTxHash := aliceChannel.channelState.LocalCommitment.CommitTx.TxHash()
|
|
if !bytes.Equal(closeTxHash[:], commitTxHash[:]) {
|
|
t.Fatalf("alice: incorrect close transaction txid")
|
|
}
|
|
|
|
closeSummary, err = bobChannel.ForceClose()
|
|
if err != nil {
|
|
t.Fatalf("unable to force close channel: %v", err)
|
|
}
|
|
|
|
// Bob's to-self output is below Bob's dust value and should be
|
|
// reflected in the ForceCloseSummary.
|
|
if closeSummary.SelfOutputSignDesc != nil {
|
|
t.Fatalf("bob incorrectly includes to-self output in " +
|
|
"ForceCloseSummary")
|
|
}
|
|
|
|
closeTxHash = closeSummary.CloseTx.TxHash()
|
|
commitTxHash = bobChannel.channelState.LocalCommitment.CommitTx.TxHash()
|
|
if !bytes.Equal(closeTxHash[:], commitTxHash[:]) {
|
|
t.Fatalf("bob: incorrect close transaction txid")
|
|
}
|
|
}
|
|
|
|
// TestBreachClose checks that the resulting ForceCloseSummary is correct when a
|
|
// peer is ForceClosing the channel. Will check outputs both above and below
|
|
// the dust limit.
|
|
func TestBreachClose(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
// Create a test channel which will be used for the duration of this
|
|
// unittest. The channel will be funded evenly with Alice having 5 BTC,
|
|
// and Bob having 5 BTC.
|
|
aliceChannel, bobChannel, notifier, cleanUp, err :=
|
|
createSpendableTestChannels(1)
|
|
if err != nil {
|
|
t.Fatalf("unable to create test channels: %v", err)
|
|
}
|
|
defer cleanUp()
|
|
|
|
// Send one HTLC from Alice to Bob, and advance the state of both
|
|
// channels.
|
|
htlcAmount := lnwire.NewMSatFromSatoshis(20000)
|
|
htlc, _ := createHTLC(0, htlcAmount)
|
|
if _, err := aliceChannel.AddHTLC(htlc); err != nil {
|
|
t.Fatalf("alice unable to add htlc: %v", err)
|
|
}
|
|
if _, err := bobChannel.ReceiveHTLC(htlc); err != nil {
|
|
t.Fatalf("bob unable to recv add htlc: %v", err)
|
|
}
|
|
if err := forceStateTransition(aliceChannel, bobChannel); err != nil {
|
|
t.Fatalf("Can't update the channel state: %v", err)
|
|
}
|
|
|
|
// Construct a force close summary of Bob's channel, this includes the
|
|
// breach transaction that will be used to spend the funding point.
|
|
forceCloseSummary, err := bobChannel.ForceClose()
|
|
if err != nil {
|
|
t.Fatalf("unable to force close bob's channel: %v", err)
|
|
}
|
|
|
|
// Send another HTLC and advance the state of both channels again. This
|
|
// ensures that Alice's state will be ahead of the breach transaction
|
|
// generated above.
|
|
htlc2, _ := createHTLC(1, htlcAmount)
|
|
if _, err := aliceChannel.AddHTLC(htlc2); err != nil {
|
|
t.Fatalf("alice unable to add htlc: %v", err)
|
|
}
|
|
if _, err := bobChannel.ReceiveHTLC(htlc2); err != nil {
|
|
t.Fatalf("bob unable to recv add htlc: %v", err)
|
|
}
|
|
if err := forceStateTransition(aliceChannel, bobChannel); err != nil {
|
|
t.Fatalf("Can't update the channel state: %v", err)
|
|
}
|
|
|
|
chanPoint := aliceChannel.ChanPoint
|
|
breachTxn := forceCloseSummary.CloseTx
|
|
|
|
// Spend the funding point using the breach transaction.
|
|
notifier.Spend(chanPoint, 100, breachTxn)
|
|
|
|
// Set up a separate routine to monitor alice's channel for a response
|
|
// to the spend. We use a generous timeout to ensure the test doesn't
|
|
// stall indefinitely, but allows us to block the main routine until the
|
|
// close observer exits.
|
|
errChan := make(chan error, 1)
|
|
var wg sync.WaitGroup
|
|
wg.Add(1)
|
|
go func() {
|
|
defer wg.Done()
|
|
|
|
select {
|
|
case ret := <-aliceChannel.ContractBreach:
|
|
errChan <- nil
|
|
// Acknowledge a successful processing of the
|
|
// retribution information.
|
|
ret.Err <- nil
|
|
case <-aliceChannel.UnilateralClose:
|
|
errChan <- errors.New("expected breach close to " +
|
|
"be signaled, not unilateral")
|
|
case <-time.After(60 * time.Second):
|
|
errChan <- errors.New("breach was not signaled")
|
|
}
|
|
}()
|
|
|
|
// Wait for both the close observer to exit and our background process
|
|
// to exit before attempting to read from the error channel.
|
|
aliceChannel.WaitForClose()
|
|
wg.Wait()
|
|
|
|
// Now that all tasks have been shutdown, handle the result. The result
|
|
// should be available immediately, we allow five seconds to handle any
|
|
// variance in scheduling on travis.
|
|
select {
|
|
case err := <-errChan:
|
|
if err != nil {
|
|
t.Fatalf(err.Error())
|
|
}
|
|
|
|
case <-time.After(5 * time.Second):
|
|
t.Fatalf("breach was not received")
|
|
}
|
|
}
|
|
|
|
// TestDustHTLCFees checks that fees are calculated correctly when HTLCs fall
|
|
// below the nodes' dust limit. In these cases, the amount of the dust HTLCs
|
|
// should be applied to the commitment transaction fee.
|
|
func TestDustHTLCFees(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
// Create a test channel which will be used for the duration of this
|
|
// unittest. The channel will be funded evenly with Alice having 5 BTC,
|
|
// and Bob having 5 BTC.
|
|
aliceChannel, bobChannel, cleanUp, err := createTestChannels(3)
|
|
if err != nil {
|
|
t.Fatalf("unable to create test channels: %v", err)
|
|
}
|
|
defer cleanUp()
|
|
|
|
aliceStartingBalance := aliceChannel.channelState.LocalCommitment.LocalBalance
|
|
|
|
// This HTLC amount should be lower than the dust limits of both nodes.
|
|
htlcAmount := lnwire.NewMSatFromSatoshis(100)
|
|
htlc, _ := createHTLC(0, htlcAmount)
|
|
if _, err := aliceChannel.AddHTLC(htlc); err != nil {
|
|
t.Fatalf("alice unable to add htlc: %v", err)
|
|
}
|
|
if _, err := bobChannel.ReceiveHTLC(htlc); err != nil {
|
|
t.Fatalf("bob unable to receive htlc: %v", err)
|
|
}
|
|
if err := forceStateTransition(aliceChannel, bobChannel); err != nil {
|
|
t.Fatalf("Can't update the channel state: %v", err)
|
|
}
|
|
|
|
// After the transition, we'll ensure that we performed fee accounting
|
|
// properly. Namely, the local+remote+commitfee values should add up to
|
|
// the total capacity of the channel. This same should hold for both
|
|
// sides.
|
|
totalSatoshisAlice := (aliceChannel.channelState.LocalCommitment.LocalBalance +
|
|
aliceChannel.channelState.LocalCommitment.RemoteBalance +
|
|
lnwire.NewMSatFromSatoshis(aliceChannel.channelState.LocalCommitment.CommitFee))
|
|
if totalSatoshisAlice+htlcAmount != lnwire.NewMSatFromSatoshis(aliceChannel.Capacity) {
|
|
t.Fatalf("alice's funds leaked: total satoshis are %v, but channel "+
|
|
"capacity is %v", int64(totalSatoshisAlice),
|
|
int64(aliceChannel.Capacity))
|
|
}
|
|
totalSatoshisBob := (bobChannel.channelState.LocalCommitment.LocalBalance +
|
|
bobChannel.channelState.LocalCommitment.RemoteBalance +
|
|
lnwire.NewMSatFromSatoshis(bobChannel.channelState.LocalCommitment.CommitFee))
|
|
if totalSatoshisBob+htlcAmount != lnwire.NewMSatFromSatoshis(bobChannel.Capacity) {
|
|
t.Fatalf("bob's funds leaked: total satoshis are %v, but channel "+
|
|
"capacity is %v", int64(totalSatoshisBob),
|
|
int64(bobChannel.Capacity))
|
|
}
|
|
|
|
// The commitment fee paid should be the same, as there have been no
|
|
// new material outputs added.
|
|
defaultFee := calcStaticFee(0)
|
|
if aliceChannel.channelState.LocalCommitment.CommitFee != defaultFee {
|
|
t.Fatalf("dust htlc amounts not subtracted from commitment fee "+
|
|
"expected %v, got %v", defaultFee,
|
|
aliceChannel.channelState.LocalCommitment.CommitFee)
|
|
}
|
|
if bobChannel.channelState.LocalCommitment.CommitFee != defaultFee {
|
|
t.Fatalf("dust htlc amounts not subtracted from commitment fee "+
|
|
"expected %v, got %v", defaultFee,
|
|
bobChannel.channelState.LocalCommitment.CommitFee)
|
|
}
|
|
|
|
// Alice's final balance should reflect the HTLC deficit even though
|
|
// the HTLC was paid to fees as it was trimmed.
|
|
aliceEndBalance := aliceChannel.channelState.LocalCommitment.LocalBalance
|
|
aliceExpectedBalance := aliceStartingBalance - htlcAmount
|
|
if aliceEndBalance != aliceExpectedBalance {
|
|
t.Fatalf("alice not credited for dust: expected %v, got %v",
|
|
aliceExpectedBalance, aliceEndBalance)
|
|
}
|
|
}
|
|
|
|
// TestHTLCDustLimit checks the situation in which an HTLC is larger than one
|
|
// channel participant's dust limit, but smaller than the other participant's
|
|
// dust limit. In this case, the participants' commitment chains will diverge.
|
|
// In one commitment chain, the HTLC will be added as normal, in the other
|
|
// chain, the amount of the HTLC will contribute to the fees to be paid.
|
|
func TestHTLCDustLimit(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
// Create a test channel which will be used for the duration of this
|
|
// unittest. The channel will be funded evenly with Alice having 5 BTC,
|
|
// and Bob having 5 BTC.
|
|
aliceChannel, bobChannel, cleanUp, err := createTestChannels(3)
|
|
if err != nil {
|
|
t.Fatalf("unable to create test channels: %v", err)
|
|
}
|
|
defer cleanUp()
|
|
|
|
// The amount of the HTLC should be above Alice's dust limit and below
|
|
// Bob's dust limit.
|
|
htlcSat := (btcutil.Amount(500) +
|
|
htlcTimeoutFee(aliceChannel.channelState.LocalCommitment.FeePerKw))
|
|
htlcAmount := lnwire.NewMSatFromSatoshis(htlcSat)
|
|
|
|
htlc, preimage := createHTLC(0, htlcAmount)
|
|
aliceHtlcIndex, err := aliceChannel.AddHTLC(htlc)
|
|
if err != nil {
|
|
t.Fatalf("alice unable to add htlc: %v", err)
|
|
}
|
|
bobHtlcIndex, err := bobChannel.ReceiveHTLC(htlc)
|
|
if err != nil {
|
|
t.Fatalf("bob unable to receive htlc: %v", err)
|
|
}
|
|
if err := forceStateTransition(aliceChannel, bobChannel); err != nil {
|
|
t.Fatalf("Can't update the channel state: %v", err)
|
|
}
|
|
|
|
// At this point, Alice's commitment transaction should have an HTLC,
|
|
// while Bob's should not, because the value falls beneath his dust
|
|
// limit. The amount of the HTLC should be applied to fees in Bob's
|
|
// commitment transaction.
|
|
aliceCommitment := aliceChannel.localCommitChain.tip()
|
|
if len(aliceCommitment.txn.TxOut) != 3 {
|
|
t.Fatalf("incorrect # of outputs: expected %v, got %v",
|
|
3, len(aliceCommitment.txn.TxOut))
|
|
}
|
|
bobCommitment := bobChannel.localCommitChain.tip()
|
|
if len(bobCommitment.txn.TxOut) != 2 {
|
|
t.Fatalf("incorrect # of outputs: expected %v, got %v",
|
|
2, len(bobCommitment.txn.TxOut))
|
|
}
|
|
defaultFee := calcStaticFee(0)
|
|
if bobChannel.channelState.LocalCommitment.CommitFee != defaultFee {
|
|
t.Fatalf("dust htlc amount was subtracted from commitment fee "+
|
|
"expected %v, got %v", defaultFee,
|
|
bobChannel.channelState.LocalCommitment.CommitFee)
|
|
}
|
|
|
|
// Settle HTLC and create a new commitment state.
|
|
err = bobChannel.SettleHTLC(preimage, bobHtlcIndex)
|
|
if err != nil {
|
|
t.Fatalf("bob unable to settle inbound htlc: %v", err)
|
|
}
|
|
err = aliceChannel.ReceiveHTLCSettle(preimage, aliceHtlcIndex)
|
|
if err != nil {
|
|
t.Fatalf("alice unable to accept settle of outbound htlc: %v", err)
|
|
}
|
|
if err := forceStateTransition(bobChannel, aliceChannel); err != nil {
|
|
t.Fatalf("state transition error: %v", err)
|
|
}
|
|
|
|
// At this point, for Alice's commitment chains, the value of the HTLC
|
|
// should have been added to Alice's balance and TotalSatoshisSent.
|
|
commitment := aliceChannel.localCommitChain.tip()
|
|
if len(commitment.txn.TxOut) != 2 {
|
|
t.Fatalf("incorrect # of outputs: expected %v, got %v",
|
|
2, len(commitment.txn.TxOut))
|
|
}
|
|
if aliceChannel.channelState.TotalMSatSent != htlcAmount {
|
|
t.Fatalf("alice satoshis sent incorrect: expected %v, got %v",
|
|
htlcAmount, aliceChannel.channelState.TotalMSatSent)
|
|
}
|
|
}
|
|
|
|
// TestChannelBalanceDustLimit tests the condition when the remaining balance
|
|
// for one of the channel participants is so small as to be considered dust. In
|
|
// this case, the output for that participant is removed and all funds (minus
|
|
// fees) in the commitment transaction are allocated to the remaining channel
|
|
// participant.
|
|
//
|
|
// TODO(roasbeef): test needs to be fixed after reserve limits are done
|
|
func TestChannelBalanceDustLimit(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
// Create a test channel which will be used for the duration of this
|
|
// unittest. The channel will be funded evenly with Alice having 5 BTC,
|
|
// and Bob having 5 BTC.
|
|
aliceChannel, bobChannel, cleanUp, err := createTestChannels(3)
|
|
if err != nil {
|
|
t.Fatalf("unable to create test channels: %v", err)
|
|
}
|
|
defer cleanUp()
|
|
|
|
// This amount should leave an amount larger than Alice's dust limit
|
|
// once fees have been subtracted, but smaller than Bob's dust limit.
|
|
// We account in fees for the HTLC we will be adding.
|
|
defaultFee := calcStaticFee(1)
|
|
aliceBalance := aliceChannel.channelState.LocalCommitment.LocalBalance.ToSatoshis()
|
|
htlcSat := aliceBalance - defaultFee
|
|
htlcSat += htlcSuccessFee(
|
|
aliceChannel.channelState.LocalCommitment.FeePerKw,
|
|
)
|
|
|
|
htlcAmount := lnwire.NewMSatFromSatoshis(htlcSat)
|
|
|
|
htlc, preimage := createHTLC(0, htlcAmount)
|
|
aliceHtlcIndex, err := aliceChannel.AddHTLC(htlc)
|
|
if err != nil {
|
|
t.Fatalf("alice unable to add htlc: %v", err)
|
|
}
|
|
bobHtlcIndex, err := bobChannel.ReceiveHTLC(htlc)
|
|
if err != nil {
|
|
t.Fatalf("bob unable to receive htlc: %v", err)
|
|
}
|
|
if err := forceStateTransition(aliceChannel, bobChannel); err != nil {
|
|
t.Fatalf("state transition error: %v", err)
|
|
}
|
|
err = bobChannel.SettleHTLC(preimage, bobHtlcIndex)
|
|
if err != nil {
|
|
t.Fatalf("bob unable to settle inbound htlc: %v", err)
|
|
}
|
|
err = aliceChannel.ReceiveHTLCSettle(preimage, aliceHtlcIndex)
|
|
if err != nil {
|
|
t.Fatalf("alice unable to accept settle of outbound htlc: %v", err)
|
|
}
|
|
if err := forceStateTransition(bobChannel, aliceChannel); err != nil {
|
|
t.Fatalf("state transition error: %v", err)
|
|
}
|
|
|
|
// At the conclusion of this test, in Bob's commitment chains, the
|
|
// output for Alice's balance should have been removed as dust, leaving
|
|
// only a single output that will send the remaining funds in the
|
|
// channel to Bob.
|
|
commitment := bobChannel.localCommitChain.tip()
|
|
if len(commitment.txn.TxOut) != 1 {
|
|
t.Fatalf("incorrect # of outputs: expected %v, got %v",
|
|
1, len(commitment.txn.TxOut))
|
|
}
|
|
if aliceChannel.channelState.TotalMSatSent != htlcAmount {
|
|
t.Fatalf("alice satoshis sent incorrect: expected %v, got %v",
|
|
htlcAmount, aliceChannel.channelState.TotalMSatSent)
|
|
}
|
|
}
|
|
|
|
func TestStateUpdatePersistence(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
// Create a test channel which will be used for the duration of this
|
|
// unittest. The channel will be funded evenly with Alice having 5 BTC,
|
|
// and Bob having 5 BTC.
|
|
aliceChannel, bobChannel, cleanUp, err := createTestChannels(1)
|
|
if err != nil {
|
|
t.Fatalf("unable to create test channels: %v", err)
|
|
}
|
|
defer cleanUp()
|
|
|
|
const numHtlcs = 4
|
|
htlcAmt := lnwire.NewMSatFromSatoshis(5000)
|
|
|
|
var fakeOnionBlob [lnwire.OnionPacketSize]byte
|
|
copy(fakeOnionBlob[:], bytes.Repeat([]byte{0x05}, lnwire.OnionPacketSize))
|
|
|
|
// Alice adds 3 HTLCs to the update log, while Bob adds a single HTLC.
|
|
var alicePreimage [32]byte
|
|
copy(alicePreimage[:], bytes.Repeat([]byte{0xaa}, 32))
|
|
var bobPreimage [32]byte
|
|
copy(bobPreimage[:], bytes.Repeat([]byte{0xbb}, 32))
|
|
for i := 0; i < 3; i++ {
|
|
rHash := sha256.Sum256(alicePreimage[:])
|
|
h := &lnwire.UpdateAddHTLC{
|
|
ID: uint64(i),
|
|
PaymentHash: rHash,
|
|
Amount: htlcAmt,
|
|
Expiry: uint32(10),
|
|
OnionBlob: fakeOnionBlob,
|
|
}
|
|
|
|
if _, err := aliceChannel.AddHTLC(h); err != nil {
|
|
t.Fatalf("unable to add alice's htlc: %v", err)
|
|
}
|
|
if _, err := bobChannel.ReceiveHTLC(h); err != nil {
|
|
t.Fatalf("unable to recv alice's htlc: %v", err)
|
|
}
|
|
}
|
|
rHash := sha256.Sum256(bobPreimage[:])
|
|
bobh := &lnwire.UpdateAddHTLC{
|
|
PaymentHash: rHash,
|
|
Amount: htlcAmt,
|
|
Expiry: uint32(10),
|
|
OnionBlob: fakeOnionBlob,
|
|
}
|
|
if _, err := bobChannel.AddHTLC(bobh); err != nil {
|
|
t.Fatalf("unable to add bob's htlc: %v", err)
|
|
}
|
|
if _, err := aliceChannel.ReceiveHTLC(bobh); err != nil {
|
|
t.Fatalf("unable to recv bob's htlc: %v", err)
|
|
}
|
|
|
|
// Next, Alice initiates a state transition to include the HTLC's she
|
|
// added above in a new commitment state.
|
|
if err := forceStateTransition(aliceChannel, bobChannel); err != nil {
|
|
t.Fatalf("unable to complete alice's state transition: %v", err)
|
|
}
|
|
|
|
// Since the HTLC Bob sent wasn't included in Bob's version of the
|
|
// commitment transaction (but it was in Alice's, as he ACK'd her
|
|
// changes before creating a new state), Bob needs to trigger another
|
|
// state update in order to re-sync their states.
|
|
if err := forceStateTransition(bobChannel, aliceChannel); err != nil {
|
|
t.Fatalf("unable to complete bob's state transition: %v", err)
|
|
}
|
|
|
|
// The latest commitment from both sides should have all the HTLCs.
|
|
numAliceOutgoing := aliceChannel.localCommitChain.tail().outgoingHTLCs
|
|
numAliceIncoming := aliceChannel.localCommitChain.tail().incomingHTLCs
|
|
if len(numAliceOutgoing) != 3 {
|
|
t.Fatalf("expected %v htlcs, instead got %v", 3, numAliceOutgoing)
|
|
}
|
|
if len(numAliceIncoming) != 1 {
|
|
t.Fatalf("expected %v htlcs, instead got %v", 1, numAliceIncoming)
|
|
}
|
|
numBobOutgoing := bobChannel.localCommitChain.tail().outgoingHTLCs
|
|
numBobIncoming := bobChannel.localCommitChain.tail().incomingHTLCs
|
|
if len(numBobOutgoing) != 1 {
|
|
t.Fatalf("expected %v htlcs, instead got %v", 1, numBobOutgoing)
|
|
}
|
|
if len(numBobIncoming) != 3 {
|
|
t.Fatalf("expected %v htlcs, instead got %v", 3, numBobIncoming)
|
|
}
|
|
|
|
// TODO(roasbeef): also ensure signatures were stored
|
|
// * ensure expiry matches
|
|
|
|
// Now fetch both of the channels created above from disk to simulate a
|
|
// node restart with persistence.
|
|
alicePub := aliceChannel.channelState.IdentityPub
|
|
aliceChannels, err := aliceChannel.channelState.Db.FetchOpenChannels(
|
|
alicePub,
|
|
)
|
|
if err != nil {
|
|
t.Fatalf("unable to fetch channel: %v", err)
|
|
}
|
|
bobPub := bobChannel.channelState.IdentityPub
|
|
bobChannels, err := bobChannel.channelState.Db.FetchOpenChannels(bobPub)
|
|
if err != nil {
|
|
t.Fatalf("unable to fetch channel: %v", err)
|
|
}
|
|
notifier := aliceChannel.channelEvents
|
|
aliceChannelNew, err := NewLightningChannel(aliceChannel.signer,
|
|
notifier, aliceChannel.feeEstimator, aliceChannels[0])
|
|
if err != nil {
|
|
t.Fatalf("unable to create new channel: %v", err)
|
|
}
|
|
bobChannelNew, err := NewLightningChannel(bobChannel.signer, notifier,
|
|
bobChannel.feeEstimator, bobChannels[0])
|
|
if err != nil {
|
|
t.Fatalf("unable to create new channel: %v", err)
|
|
}
|
|
|
|
// The state update logs of the new channels and the old channels
|
|
// should now be identical other than the height the HTLCs were added.
|
|
if aliceChannel.localUpdateLog.logIndex !=
|
|
aliceChannelNew.localUpdateLog.logIndex {
|
|
t.Fatalf("alice log counter: expected %v, got %v",
|
|
aliceChannel.localUpdateLog.logIndex,
|
|
aliceChannelNew.localUpdateLog.logIndex)
|
|
}
|
|
if aliceChannel.remoteUpdateLog.logIndex !=
|
|
aliceChannelNew.remoteUpdateLog.logIndex {
|
|
t.Fatalf("alice log counter: expected %v, got %v",
|
|
aliceChannel.remoteUpdateLog.logIndex,
|
|
aliceChannelNew.remoteUpdateLog.logIndex)
|
|
}
|
|
if aliceChannel.localUpdateLog.Len() !=
|
|
aliceChannelNew.localUpdateLog.Len() {
|
|
t.Fatalf("alice log len: expected %v, got %v",
|
|
aliceChannel.localUpdateLog.Len(),
|
|
aliceChannelNew.localUpdateLog.Len())
|
|
}
|
|
if aliceChannel.remoteUpdateLog.Len() !=
|
|
aliceChannelNew.remoteUpdateLog.Len() {
|
|
t.Fatalf("alice log len: expected %v, got %v",
|
|
aliceChannel.remoteUpdateLog.Len(),
|
|
aliceChannelNew.remoteUpdateLog.Len())
|
|
}
|
|
if bobChannel.localUpdateLog.logIndex !=
|
|
bobChannelNew.localUpdateLog.logIndex {
|
|
t.Fatalf("bob log counter: expected %v, got %v",
|
|
bobChannel.localUpdateLog.logIndex,
|
|
bobChannelNew.localUpdateLog.logIndex)
|
|
}
|
|
if bobChannel.remoteUpdateLog.logIndex !=
|
|
bobChannelNew.remoteUpdateLog.logIndex {
|
|
t.Fatalf("bob log counter: expected %v, got %v",
|
|
bobChannel.remoteUpdateLog.logIndex,
|
|
bobChannelNew.remoteUpdateLog.logIndex)
|
|
}
|
|
if bobChannel.localUpdateLog.Len() !=
|
|
bobChannelNew.localUpdateLog.Len() {
|
|
t.Fatalf("bob log len: expected %v, got %v",
|
|
bobChannel.localUpdateLog.Len(),
|
|
bobChannelNew.localUpdateLog.Len())
|
|
}
|
|
if bobChannel.remoteUpdateLog.Len() !=
|
|
bobChannelNew.remoteUpdateLog.Len() {
|
|
t.Fatalf("bob log len: expected %v, got %v",
|
|
bobChannel.remoteUpdateLog.Len(),
|
|
bobChannelNew.remoteUpdateLog.Len())
|
|
}
|
|
|
|
// TODO(roasbeef): expand test to also ensure state revocation log has
|
|
// proper pk scripts
|
|
|
|
// Newly generated pkScripts for HTLCs should be the same as in the old channel.
|
|
for _, entry := range aliceChannel.localUpdateLog.htlcIndex {
|
|
htlc := entry.Value.(*PaymentDescriptor)
|
|
restoredHtlc := aliceChannelNew.localUpdateLog.lookupHtlc(htlc.HtlcIndex)
|
|
if !bytes.Equal(htlc.ourPkScript, restoredHtlc.ourPkScript) {
|
|
t.Fatalf("alice ourPkScript in ourLog: expected %X, got %X",
|
|
htlc.ourPkScript[:5], restoredHtlc.ourPkScript[:5])
|
|
}
|
|
if !bytes.Equal(htlc.theirPkScript, restoredHtlc.theirPkScript) {
|
|
t.Fatalf("alice theirPkScript in ourLog: expected %X, got %X",
|
|
htlc.theirPkScript[:5], restoredHtlc.theirPkScript[:5])
|
|
}
|
|
}
|
|
for _, entry := range aliceChannel.remoteUpdateLog.htlcIndex {
|
|
htlc := entry.Value.(*PaymentDescriptor)
|
|
restoredHtlc := aliceChannelNew.remoteUpdateLog.lookupHtlc(htlc.HtlcIndex)
|
|
if !bytes.Equal(htlc.ourPkScript, restoredHtlc.ourPkScript) {
|
|
t.Fatalf("alice ourPkScript in theirLog: expected %X, got %X",
|
|
htlc.ourPkScript[:5], restoredHtlc.ourPkScript[:5])
|
|
}
|
|
if !bytes.Equal(htlc.theirPkScript, restoredHtlc.theirPkScript) {
|
|
t.Fatalf("alice theirPkScript in theirLog: expected %X, got %X",
|
|
htlc.theirPkScript[:5], restoredHtlc.theirPkScript[:5])
|
|
}
|
|
}
|
|
for _, entry := range bobChannel.localUpdateLog.htlcIndex {
|
|
htlc := entry.Value.(*PaymentDescriptor)
|
|
restoredHtlc := bobChannelNew.localUpdateLog.lookupHtlc(htlc.HtlcIndex)
|
|
if !bytes.Equal(htlc.ourPkScript, restoredHtlc.ourPkScript) {
|
|
t.Fatalf("bob ourPkScript in ourLog: expected %X, got %X",
|
|
htlc.ourPkScript[:5], restoredHtlc.ourPkScript[:5])
|
|
}
|
|
if !bytes.Equal(htlc.theirPkScript, restoredHtlc.theirPkScript) {
|
|
t.Fatalf("bob theirPkScript in ourLog: expected %X, got %X",
|
|
htlc.theirPkScript[:5], restoredHtlc.theirPkScript[:5])
|
|
}
|
|
}
|
|
for _, entry := range bobChannel.remoteUpdateLog.htlcIndex {
|
|
htlc := entry.Value.(*PaymentDescriptor)
|
|
restoredHtlc := bobChannelNew.remoteUpdateLog.lookupHtlc(htlc.HtlcIndex)
|
|
if !bytes.Equal(htlc.ourPkScript, restoredHtlc.ourPkScript) {
|
|
t.Fatalf("bob ourPkScript in theirLog: expected %X, got %X",
|
|
htlc.ourPkScript[:5], restoredHtlc.ourPkScript[:5])
|
|
}
|
|
if !bytes.Equal(htlc.theirPkScript, restoredHtlc.theirPkScript) {
|
|
t.Fatalf("bob theirPkScript in theirLog: expected %X, got %X",
|
|
htlc.theirPkScript[:5], restoredHtlc.theirPkScript[:5])
|
|
}
|
|
}
|
|
|
|
// Now settle all the HTLCs, then force a state update. The state
|
|
// update should succeed as both sides have identical.
|
|
for i := 0; i < 3; i++ {
|
|
err := bobChannelNew.SettleHTLC(alicePreimage, uint64(i))
|
|
if err != nil {
|
|
t.Fatalf("unable to settle htlc #%v: %v", i, err)
|
|
}
|
|
err = aliceChannelNew.ReceiveHTLCSettle(alicePreimage, uint64(i))
|
|
if err != nil {
|
|
t.Fatalf("unable to settle htlc#%v: %v", i, err)
|
|
}
|
|
}
|
|
err = aliceChannelNew.SettleHTLC(bobPreimage, 0)
|
|
if err != nil {
|
|
t.Fatalf("unable to settle htlc: %v", err)
|
|
}
|
|
err = bobChannelNew.ReceiveHTLCSettle(bobPreimage, 0)
|
|
if err != nil {
|
|
t.Fatalf("unable to settle htlc: %v", err)
|
|
}
|
|
|
|
// Similar to the two transitions above, as both Bob and Alice added
|
|
// entries to the update log before a state transition was initiated by
|
|
// either side, both sides are required to trigger an update in order
|
|
// to lock in their changes.
|
|
if err := forceStateTransition(aliceChannelNew, bobChannelNew); err != nil {
|
|
t.Fatalf("unable to update commitments: %v", err)
|
|
}
|
|
if err := forceStateTransition(bobChannelNew, aliceChannelNew); err != nil {
|
|
t.Fatalf("unable to update commitments: %v", err)
|
|
}
|
|
|
|
// The amounts transferred should been updated as per the amounts in
|
|
// the HTLCs
|
|
if aliceChannelNew.channelState.TotalMSatSent != htlcAmt*3 {
|
|
t.Fatalf("expected %v alice satoshis sent, got %v",
|
|
htlcAmt*3, aliceChannelNew.channelState.TotalMSatSent)
|
|
}
|
|
if aliceChannelNew.channelState.TotalMSatReceived != htlcAmt {
|
|
t.Fatalf("expected %v alice satoshis received, got %v",
|
|
htlcAmt, aliceChannelNew.channelState.TotalMSatReceived)
|
|
}
|
|
if bobChannelNew.channelState.TotalMSatSent != htlcAmt {
|
|
t.Fatalf("expected %v bob satoshis sent, got %v",
|
|
htlcAmt, bobChannel.channelState.TotalMSatSent)
|
|
}
|
|
if bobChannelNew.channelState.TotalMSatReceived != htlcAmt*3 {
|
|
t.Fatalf("expected %v bob satoshis sent, got %v",
|
|
htlcAmt*3, bobChannel.channelState.TotalMSatReceived)
|
|
}
|
|
|
|
// As a final test, we'll ensure that the HTLC counters for both sides
|
|
// has been persisted properly. If we instruct Alice to add a new HTLC,
|
|
// it should have an index of 3. If we instruct Bob to do the
|
|
// same, it should have an index of 1.
|
|
aliceHtlcIndex, err := aliceChannel.AddHTLC(bobh)
|
|
if err != nil {
|
|
t.Fatalf("unable to add htlc: %v", err)
|
|
}
|
|
if aliceHtlcIndex != 3 {
|
|
t.Fatalf("wrong htlc index: expected %v, got %v", 3, aliceHtlcIndex)
|
|
}
|
|
bobHtlcIndex, err := bobChannel.AddHTLC(bobh)
|
|
if err != nil {
|
|
t.Fatalf("unable to add htlc: %v", err)
|
|
}
|
|
if bobHtlcIndex != 1 {
|
|
t.Fatalf("wrong htlc index: expected %v, got %v", 1, aliceHtlcIndex)
|
|
}
|
|
}
|
|
|
|
func TestCancelHTLC(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
// Create a test channel which will be used for the duration of this
|
|
// unittest. The channel will be funded evenly with Alice having 5 BTC,
|
|
// and Bob having 5 BTC.
|
|
aliceChannel, bobChannel, cleanUp, err := createTestChannels(5)
|
|
if err != nil {
|
|
t.Fatalf("unable to create test channels: %v", err)
|
|
}
|
|
defer cleanUp()
|
|
|
|
// Add a new HTLC from Alice to Bob, then trigger a new state
|
|
// transition in order to include it in the latest state.
|
|
htlcAmt := lnwire.NewMSatFromSatoshis(btcutil.SatoshiPerBitcoin)
|
|
|
|
var preImage [32]byte
|
|
copy(preImage[:], bytes.Repeat([]byte{0xaa}, 32))
|
|
htlc := &lnwire.UpdateAddHTLC{
|
|
PaymentHash: sha256.Sum256(preImage[:]),
|
|
Amount: htlcAmt,
|
|
Expiry: 10,
|
|
}
|
|
|
|
aliceHtlcIndex, err := aliceChannel.AddHTLC(htlc)
|
|
if err != nil {
|
|
t.Fatalf("unable to add alice htlc: %v", err)
|
|
}
|
|
bobHtlcIndex, err := bobChannel.ReceiveHTLC(htlc)
|
|
if err != nil {
|
|
t.Fatalf("unable to add bob htlc: %v", err)
|
|
}
|
|
if err := forceStateTransition(aliceChannel, bobChannel); err != nil {
|
|
t.Fatalf("unable to create new commitment state: %v", err)
|
|
}
|
|
|
|
// With the HTLC committed, Alice's balance should reflect the clearing
|
|
// of the new HTLC.
|
|
aliceExpectedBalance := btcutil.Amount(btcutil.SatoshiPerBitcoin*4) -
|
|
calcStaticFee(1)
|
|
if aliceChannel.channelState.LocalCommitment.LocalBalance.ToSatoshis() !=
|
|
aliceExpectedBalance {
|
|
t.Fatalf("Alice's balance is wrong: expected %v, got %v",
|
|
aliceExpectedBalance,
|
|
aliceChannel.channelState.LocalCommitment.LocalBalance.ToSatoshis())
|
|
}
|
|
|
|
// Now, with the HTLC committed on both sides, trigger a cancellation
|
|
// from Bob to Alice, removing the HTLC.
|
|
err = bobChannel.FailHTLC(bobHtlcIndex, []byte("failreason"))
|
|
if err != nil {
|
|
t.Fatalf("unable to cancel HTLC: %v", err)
|
|
}
|
|
err = aliceChannel.ReceiveFailHTLC(aliceHtlcIndex, []byte("bad"))
|
|
if err != nil {
|
|
t.Fatalf("unable to recv htlc cancel: %v", err)
|
|
}
|
|
|
|
// Now trigger another state transition, the HTLC should now be removed
|
|
// from both sides, with balances reflected.
|
|
if err := forceStateTransition(bobChannel, aliceChannel); err != nil {
|
|
t.Fatalf("unable to create new commitment: %v", err)
|
|
}
|
|
|
|
// Now HTLCs should be present on the commitment transaction for either
|
|
// side.
|
|
if len(aliceChannel.localCommitChain.tip().outgoingHTLCs) != 0 ||
|
|
len(aliceChannel.remoteCommitChain.tip().outgoingHTLCs) != 0 {
|
|
t.Fatalf("htlc's still active from alice's POV")
|
|
}
|
|
if len(aliceChannel.localCommitChain.tip().incomingHTLCs) != 0 ||
|
|
len(aliceChannel.remoteCommitChain.tip().incomingHTLCs) != 0 {
|
|
t.Fatalf("htlc's still active from alice's POV")
|
|
}
|
|
if len(bobChannel.localCommitChain.tip().outgoingHTLCs) != 0 ||
|
|
len(bobChannel.remoteCommitChain.tip().outgoingHTLCs) != 0 {
|
|
t.Fatalf("htlc's still active from bob's POV")
|
|
}
|
|
if len(bobChannel.localCommitChain.tip().incomingHTLCs) != 0 ||
|
|
len(bobChannel.remoteCommitChain.tip().incomingHTLCs) != 0 {
|
|
t.Fatalf("htlc's still active from bob's POV")
|
|
}
|
|
|
|
expectedBalance := btcutil.Amount(btcutil.SatoshiPerBitcoin * 5)
|
|
if aliceChannel.channelState.LocalCommitment.LocalBalance.ToSatoshis() !=
|
|
expectedBalance-calcStaticFee(0) {
|
|
|
|
t.Fatalf("balance is wrong: expected %v, got %v",
|
|
aliceChannel.channelState.LocalCommitment.LocalBalance.ToSatoshis(),
|
|
expectedBalance-calcStaticFee(0))
|
|
}
|
|
if aliceChannel.channelState.LocalCommitment.RemoteBalance.ToSatoshis() !=
|
|
expectedBalance {
|
|
|
|
t.Fatalf("balance is wrong: expected %v, got %v",
|
|
aliceChannel.channelState.LocalCommitment.RemoteBalance.ToSatoshis(),
|
|
expectedBalance)
|
|
}
|
|
if bobChannel.channelState.LocalCommitment.LocalBalance.ToSatoshis() !=
|
|
expectedBalance {
|
|
|
|
t.Fatalf("balance is wrong: expected %v, got %v",
|
|
bobChannel.channelState.LocalCommitment.LocalBalance.ToSatoshis(),
|
|
expectedBalance)
|
|
}
|
|
if bobChannel.channelState.LocalCommitment.RemoteBalance.ToSatoshis() !=
|
|
expectedBalance-calcStaticFee(0) {
|
|
|
|
t.Fatalf("balance is wrong: expected %v, got %v",
|
|
bobChannel.channelState.LocalCommitment.RemoteBalance.ToSatoshis(),
|
|
expectedBalance-calcStaticFee(0))
|
|
}
|
|
}
|
|
|
|
func TestCooperativeCloseDustAdherence(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
// Create a test channel which will be used for the duration of this
|
|
// unittest. The channel will be funded evenly with Alice having 5 BTC,
|
|
// and Bob having 5 BTC.
|
|
aliceChannel, bobChannel, cleanUp, err := createTestChannels(5)
|
|
if err != nil {
|
|
t.Fatalf("unable to create test channels: %v", err)
|
|
}
|
|
defer cleanUp()
|
|
|
|
aliceFeeRate := uint64(aliceChannel.channelState.LocalCommitment.FeePerKw)
|
|
bobFeeRate := uint64(bobChannel.channelState.LocalCommitment.FeePerKw)
|
|
|
|
setDustLimit := func(dustVal btcutil.Amount) {
|
|
aliceChannel.channelState.LocalChanCfg.DustLimit = dustVal
|
|
aliceChannel.channelState.RemoteChanCfg.DustLimit = dustVal
|
|
bobChannel.channelState.LocalChanCfg.DustLimit = dustVal
|
|
bobChannel.channelState.RemoteChanCfg.DustLimit = dustVal
|
|
}
|
|
|
|
resetChannelState := func() {
|
|
aliceChannel.status = channelOpen
|
|
bobChannel.status = channelOpen
|
|
}
|
|
|
|
setBalances := func(aliceBalance, bobBalance lnwire.MilliSatoshi) {
|
|
aliceChannel.channelState.LocalCommitment.LocalBalance = aliceBalance
|
|
aliceChannel.channelState.LocalCommitment.RemoteBalance = bobBalance
|
|
bobChannel.channelState.LocalCommitment.LocalBalance = bobBalance
|
|
bobChannel.channelState.LocalCommitment.RemoteBalance = aliceBalance
|
|
}
|
|
|
|
aliceDeliveryScript := bobsPrivKey[:]
|
|
bobDeliveryScript := testHdSeed[:]
|
|
|
|
// We'll start be initializing the limit of both Alice and Bob to 10k
|
|
// satoshis.
|
|
dustLimit := btcutil.Amount(10000)
|
|
setDustLimit(dustLimit)
|
|
|
|
// Both sides currently have over 1 BTC settled as part of their
|
|
// balances. As a result, performing a cooperative closure now result
|
|
// in both sides having an output within the closure transaction.
|
|
aliceFee := btcutil.Amount(aliceChannel.CalcFee(aliceFeeRate)) + 1000
|
|
aliceSig, err := aliceChannel.CreateCloseProposal(aliceFee,
|
|
aliceDeliveryScript, bobDeliveryScript)
|
|
if err != nil {
|
|
t.Fatalf("unable to close channel: %v", err)
|
|
}
|
|
aliceCloseSig := append(aliceSig, byte(txscript.SigHashAll))
|
|
|
|
bobFee := btcutil.Amount(bobChannel.CalcFee(bobFeeRate)) + 1000
|
|
bobSig, err := bobChannel.CreateCloseProposal(bobFee,
|
|
bobDeliveryScript, aliceDeliveryScript)
|
|
if err != nil {
|
|
t.Fatalf("unable to close channel: %v", err)
|
|
}
|
|
bobCloseSig := append(bobSig, byte(txscript.SigHashAll))
|
|
|
|
closeTx, _, err := bobChannel.CompleteCooperativeClose(
|
|
bobCloseSig, aliceCloseSig,
|
|
bobDeliveryScript, aliceDeliveryScript, bobFee)
|
|
if err != nil {
|
|
t.Fatalf("unable to accept channel close: %v", err)
|
|
}
|
|
|
|
// The closure transaction should have exactly two outputs.
|
|
if len(closeTx.TxOut) != 2 {
|
|
t.Fatalf("close tx has wrong number of outputs: expected %v "+
|
|
"got %v", 2, len(closeTx.TxOut))
|
|
}
|
|
|
|
// We'll reset the channel states before proceeding to our nest test.
|
|
resetChannelState()
|
|
|
|
// Next we'll modify the current balances and dust limits such that
|
|
// Bob's current balance is above _below_ his dust limit.
|
|
aliceBal := lnwire.NewMSatFromSatoshis(btcutil.SatoshiPerBitcoin)
|
|
bobBal := lnwire.NewMSatFromSatoshis(250)
|
|
setBalances(aliceBal, bobBal)
|
|
|
|
// Attempt another cooperative channel closure. It should succeed
|
|
// without any issues.
|
|
aliceSig, err = aliceChannel.CreateCloseProposal(aliceFee,
|
|
aliceDeliveryScript, bobDeliveryScript)
|
|
if err != nil {
|
|
t.Fatalf("unable to close channel: %v", err)
|
|
}
|
|
aliceCloseSig = append(aliceSig, byte(txscript.SigHashAll))
|
|
|
|
bobSig, err = bobChannel.CreateCloseProposal(bobFee,
|
|
bobDeliveryScript, aliceDeliveryScript)
|
|
if err != nil {
|
|
t.Fatalf("unable to close channel: %v", err)
|
|
}
|
|
bobCloseSig = append(bobSig, byte(txscript.SigHashAll))
|
|
|
|
closeTx, _, err = bobChannel.CompleteCooperativeClose(
|
|
bobCloseSig, aliceCloseSig,
|
|
bobDeliveryScript, aliceDeliveryScript, bobFee)
|
|
if err != nil {
|
|
t.Fatalf("unable to accept channel close: %v", err)
|
|
}
|
|
|
|
// The closure transaction should only have a single output, and that
|
|
// output should be Alice's balance.
|
|
if len(closeTx.TxOut) != 1 {
|
|
t.Fatalf("close tx has wrong number of outputs: expected %v "+
|
|
"got %v", 1, len(closeTx.TxOut))
|
|
}
|
|
commitFee := aliceChannel.channelState.LocalCommitment.CommitFee
|
|
aliceExpectedBalance := aliceBal.ToSatoshis() - aliceFee + commitFee
|
|
if closeTx.TxOut[0].Value != int64(aliceExpectedBalance) {
|
|
t.Fatalf("alice's balance is incorrect: expected %v, got %v",
|
|
aliceExpectedBalance,
|
|
int64(closeTx.TxOut[0].Value))
|
|
}
|
|
|
|
// Finally, we'll modify the current balances and dust limits such that
|
|
// Alice's current balance is _below_ his her limit.
|
|
setBalances(bobBal, aliceBal)
|
|
resetChannelState()
|
|
|
|
// Our final attempt at another cooperative channel closure. It should
|
|
// succeed without any issues.
|
|
aliceSig, err = aliceChannel.CreateCloseProposal(aliceFee,
|
|
aliceDeliveryScript, bobDeliveryScript)
|
|
if err != nil {
|
|
t.Fatalf("unable to close channel: %v", err)
|
|
}
|
|
aliceCloseSig = append(aliceSig, byte(txscript.SigHashAll))
|
|
|
|
bobSig, err = bobChannel.CreateCloseProposal(bobFee,
|
|
bobDeliveryScript, aliceDeliveryScript)
|
|
if err != nil {
|
|
t.Fatalf("unable to close channel: %v", err)
|
|
}
|
|
bobCloseSig = append(bobSig, byte(txscript.SigHashAll))
|
|
|
|
closeTx, _, err = bobChannel.CompleteCooperativeClose(
|
|
bobCloseSig, aliceCloseSig,
|
|
bobDeliveryScript, aliceDeliveryScript, bobFee)
|
|
if err != nil {
|
|
t.Fatalf("unable to accept channel close: %v", err)
|
|
}
|
|
|
|
// The closure transaction should only have a single output, and that
|
|
// output should be Bob's balance.
|
|
if len(closeTx.TxOut) != 1 {
|
|
t.Fatalf("close tx has wrong number of outputs: expected %v "+
|
|
"got %v", 1, len(closeTx.TxOut))
|
|
}
|
|
if closeTx.TxOut[0].Value != int64(aliceBal.ToSatoshis()) {
|
|
t.Fatalf("bob's balance is incorrect: expected %v, got %v",
|
|
aliceBal.ToSatoshis(), closeTx.TxOut[0].Value)
|
|
}
|
|
}
|
|
|
|
// TestUpdateFeeFail tests that the signature verification will fail if they
|
|
// fee updates are out of sync.
|
|
func TestUpdateFeeFail(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
aliceChannel, bobChannel, cleanUp, err := createTestChannels(1)
|
|
if err != nil {
|
|
t.Fatalf("unable to create test channels: %v", err)
|
|
}
|
|
defer cleanUp()
|
|
|
|
// Bob receives the update, that will apply to his commitment
|
|
// transaction.
|
|
bobChannel.ReceiveUpdateFee(111)
|
|
|
|
// Alice sends signature for commitment that does not cover any fee
|
|
// update.
|
|
aliceSig, aliceHtlcSigs, err := aliceChannel.SignNextCommitment()
|
|
if err != nil {
|
|
t.Fatalf("alice unable to sign commitment: %v", err)
|
|
}
|
|
|
|
// Bob verifies this commit, meaning that he checks that it is
|
|
// consistent everything he has received. This should fail, since he got
|
|
// the fee update, but Alice never sent it.
|
|
err = bobChannel.ReceiveNewCommitment(aliceSig, aliceHtlcSigs)
|
|
if err == nil {
|
|
t.Fatalf("expected bob to fail receiving alice's signature")
|
|
}
|
|
|
|
}
|
|
|
|
// TestUpdateFeeSenderCommits veriefies that the state machine progresses as
|
|
// expected if we send a fee update, and then the sender of the fee update
|
|
// sends a commitment signature.
|
|
func TestUpdateFeeSenderCommits(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
// Create a test channel which will be used for the duration of this
|
|
// unittest. The channel will be funded evenly with Alice having 5 BTC,
|
|
// and Bob having 5 BTC.
|
|
aliceChannel, bobChannel, cleanUp, err := createTestChannels(1)
|
|
if err != nil {
|
|
t.Fatalf("unable to create test channels: %v", err)
|
|
}
|
|
defer cleanUp()
|
|
|
|
paymentPreimage := bytes.Repeat([]byte{1}, 32)
|
|
paymentHash := sha256.Sum256(paymentPreimage)
|
|
htlc := &lnwire.UpdateAddHTLC{
|
|
PaymentHash: paymentHash,
|
|
Amount: btcutil.SatoshiPerBitcoin,
|
|
Expiry: uint32(5),
|
|
}
|
|
|
|
// First Alice adds the outgoing HTLC to her local channel's state
|
|
// update log. Then Alice sends this wire message over to Bob who
|
|
// adds this htlc to his remote state update log.
|
|
if _, err := aliceChannel.AddHTLC(htlc); err != nil {
|
|
t.Fatalf("unable to add htlc: %v", err)
|
|
}
|
|
if _, err := bobChannel.ReceiveHTLC(htlc); err != nil {
|
|
t.Fatalf("unable to recv htlc: %v", err)
|
|
}
|
|
|
|
// Simulate Alice sending update fee message to bob.
|
|
fee := btcutil.Amount(111)
|
|
aliceChannel.UpdateFee(fee)
|
|
bobChannel.ReceiveUpdateFee(fee)
|
|
|
|
// Alice signs a commitment, which will cover everything sent to Bob
|
|
// (the HTLC and the fee update), and everything acked by Bob (nothing
|
|
// so far).
|
|
aliceSig, aliceHtlcSigs, err := aliceChannel.SignNextCommitment()
|
|
if err != nil {
|
|
t.Fatalf("alice unable to sign commitment: %v", err)
|
|
}
|
|
|
|
// Bob receives this signature message, and verifies that it is
|
|
// consistent with the state he had for Alice, including the received
|
|
// HTLC and fee update.
|
|
err = bobChannel.ReceiveNewCommitment(aliceSig, aliceHtlcSigs)
|
|
if err != nil {
|
|
t.Fatalf("bob unable to process alice's new commitment: %v", err)
|
|
}
|
|
|
|
if bobChannel.channelState.LocalCommitment.FeePerKw == fee {
|
|
t.Fatalf("bob's feePerKw was unexpectedly locked in")
|
|
}
|
|
|
|
// Bob can revoke the prior commitment he had. This should lock in the
|
|
// fee update for him.
|
|
bobRevocation, err := bobChannel.RevokeCurrentCommitment()
|
|
if err != nil {
|
|
t.Fatalf("unable to generate bob revocation: %v", err)
|
|
}
|
|
|
|
if bobChannel.channelState.LocalCommitment.FeePerKw != fee {
|
|
t.Fatalf("bob's feePerKw was not locked in")
|
|
}
|
|
|
|
// Bob commits to all updates he has received from Alice. This includes
|
|
// the HTLC he received, and the fee update.
|
|
bobSig, bobHtlcSigs, err := bobChannel.SignNextCommitment()
|
|
if err != nil {
|
|
t.Fatalf("bob unable to sign alice's commitment: %v", err)
|
|
}
|
|
|
|
// Alice receives the revocation of the old one, and can now assume
|
|
// that Bob's received everything up to the signature she sent,
|
|
// including the HTLC and fee update.
|
|
if _, err := aliceChannel.ReceiveRevocation(bobRevocation); err != nil {
|
|
t.Fatalf("alice unable to rocess bob's revocation: %v", err)
|
|
}
|
|
|
|
// Alice receives new signature from Bob, and assumes this covers the
|
|
// changes.
|
|
err = aliceChannel.ReceiveNewCommitment(bobSig, bobHtlcSigs)
|
|
if err != nil {
|
|
t.Fatalf("alice unable to process bob's new commitment: %v", err)
|
|
}
|
|
|
|
if aliceChannel.channelState.LocalCommitment.FeePerKw == fee {
|
|
t.Fatalf("alice's feePerKw was unexpectedly locked in")
|
|
}
|
|
|
|
// Alice can revoke the old commitment, which will lock in the fee
|
|
// update.
|
|
aliceRevocation, err := aliceChannel.RevokeCurrentCommitment()
|
|
if err != nil {
|
|
t.Fatalf("unable to revoke alice channel: %v", err)
|
|
}
|
|
|
|
if aliceChannel.channelState.LocalCommitment.FeePerKw != fee {
|
|
t.Fatalf("alice's feePerKw was not locked in")
|
|
}
|
|
|
|
// Bob receives revocation from Alice.
|
|
if _, err := bobChannel.ReceiveRevocation(aliceRevocation); err != nil {
|
|
t.Fatalf("bob unable to process alice's revocation: %v", err)
|
|
}
|
|
|
|
}
|
|
|
|
// TestUpdateFeeReceiverCommits tests that the state machine progresses as
|
|
// expected if we send a fee update, and then the receiver of the fee update
|
|
// sends a commitment signature.
|
|
func TestUpdateFeeReceiverCommits(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
// Create a test channel which will be used for the duration of this
|
|
// unittest. The channel will be funded evenly with Alice having 5 BTC,
|
|
// and Bob having 5 BTC.
|
|
aliceChannel, bobChannel, cleanUp, err := createTestChannels(1)
|
|
if err != nil {
|
|
t.Fatalf("unable to create test channels: %v", err)
|
|
}
|
|
defer cleanUp()
|
|
|
|
paymentPreimage := bytes.Repeat([]byte{1}, 32)
|
|
paymentHash := sha256.Sum256(paymentPreimage)
|
|
htlc := &lnwire.UpdateAddHTLC{
|
|
PaymentHash: paymentHash,
|
|
Amount: btcutil.SatoshiPerBitcoin,
|
|
Expiry: uint32(5),
|
|
}
|
|
|
|
// First Alice adds the outgoing HTLC to her local channel's state
|
|
// update log. Then Alice sends this wire message over to Bob who
|
|
// adds this htlc to his remote state update log.
|
|
if _, err := aliceChannel.AddHTLC(htlc); err != nil {
|
|
t.Fatalf("unable to add htlc: %v", err)
|
|
}
|
|
if _, err := bobChannel.ReceiveHTLC(htlc); err != nil {
|
|
t.Fatalf("unable to recv htlc: %v", err)
|
|
}
|
|
|
|
// Simulate Alice sending update fee message to bob
|
|
fee := btcutil.Amount(111)
|
|
aliceChannel.UpdateFee(fee)
|
|
bobChannel.ReceiveUpdateFee(fee)
|
|
|
|
// Bob commits to every change he has sent since last time (none). He
|
|
// does not commit to the received HTLC and fee update, since Alice
|
|
// cannot know if he has received them.
|
|
bobSig, bobHtlcSigs, err := bobChannel.SignNextCommitment()
|
|
if err != nil {
|
|
t.Fatalf("alice unable to sign commitment: %v", err)
|
|
}
|
|
|
|
// Alice receives this signature message, and verifies that it is
|
|
// consistent with the remote state, not including any of the updates.
|
|
err = aliceChannel.ReceiveNewCommitment(bobSig, bobHtlcSigs)
|
|
if err != nil {
|
|
t.Fatalf("bob unable to process alice's new commitment: %v", err)
|
|
}
|
|
|
|
// Alice can revoke the prior commitment she had, this will ack
|
|
// everything received before last commitment signature, but in this
|
|
// case that is nothing.
|
|
aliceRevocation, err := aliceChannel.RevokeCurrentCommitment()
|
|
if err != nil {
|
|
t.Fatalf("unable to generate bob revocation: %v", err)
|
|
}
|
|
|
|
// Bob receives the revocation of the old commitment
|
|
if _, err := bobChannel.ReceiveRevocation(aliceRevocation); err != nil {
|
|
t.Fatalf("alice unable to rocess bob's revocation: %v", err)
|
|
}
|
|
|
|
// Alice will sign next commitment. Since she sent the revocation, she
|
|
// also ack'ed everything received, but in this case this is nothing.
|
|
// Since she sent the two updates, this signature will cover those two.
|
|
aliceSig, aliceHtlcSigs, err := aliceChannel.SignNextCommitment()
|
|
if err != nil {
|
|
t.Fatalf("bob unable to sign alice's commitment: %v", err)
|
|
}
|
|
|
|
// Bob gets the signature for the new commitment from Alice. He assumes
|
|
// this covers everything received from alice, including the two updates.
|
|
err = bobChannel.ReceiveNewCommitment(aliceSig, aliceHtlcSigs)
|
|
if err != nil {
|
|
t.Fatalf("alice unable to process bob's new commitment: %v", err)
|
|
}
|
|
|
|
if bobChannel.channelState.LocalCommitment.FeePerKw == fee {
|
|
t.Fatalf("bob's feePerKw was unexpectedly locked in")
|
|
}
|
|
|
|
// Bob can revoke the old commitment. This will ack what he has
|
|
// received, including the HTLC and fee update. This will lock in the
|
|
// fee update for bob.
|
|
bobRevocation, err := bobChannel.RevokeCurrentCommitment()
|
|
if err != nil {
|
|
t.Fatalf("unable to revoke alice channel: %v", err)
|
|
}
|
|
|
|
if bobChannel.channelState.LocalCommitment.FeePerKw != fee {
|
|
t.Fatalf("bob's feePerKw was not locked in")
|
|
}
|
|
|
|
// Bob will send a new signature, which will cover what he just acked:
|
|
// the HTLC and fee update.
|
|
bobSig, bobHtlcSigs, err = bobChannel.SignNextCommitment()
|
|
if err != nil {
|
|
t.Fatalf("alice unable to sign commitment: %v", err)
|
|
}
|
|
|
|
// Alice receives revokation from Bob, and can now be sure that Bob
|
|
// received the two updates, and they are considered locked in.
|
|
if _, err := aliceChannel.ReceiveRevocation(bobRevocation); err != nil {
|
|
t.Fatalf("bob unable to process alice's revocation: %v", err)
|
|
}
|
|
|
|
// Alice will receive the signature from Bob, which will cover what was
|
|
// just acked by his revocation.
|
|
err = aliceChannel.ReceiveNewCommitment(bobSig, bobHtlcSigs)
|
|
if err != nil {
|
|
t.Fatalf("alice unable to process bob's new commitment: %v", err)
|
|
}
|
|
|
|
if aliceChannel.channelState.LocalCommitment.FeePerKw == fee {
|
|
t.Fatalf("alice's feePerKw was unexpectedly locked in")
|
|
}
|
|
|
|
// After Alice now revokes her old commitment, the fee update should
|
|
// lock in.
|
|
aliceRevocation, err = aliceChannel.RevokeCurrentCommitment()
|
|
if err != nil {
|
|
t.Fatalf("unable to generate bob revocation: %v", err)
|
|
}
|
|
|
|
if aliceChannel.channelState.LocalCommitment.FeePerKw != fee {
|
|
t.Fatalf("Alice's feePerKw was not locked in")
|
|
}
|
|
|
|
// Bob receives revocation from Alice.
|
|
if _, err := bobChannel.ReceiveRevocation(aliceRevocation); err != nil {
|
|
t.Fatalf("bob unable to process alice's revocation: %v", err)
|
|
}
|
|
}
|
|
|
|
// TestUpdateFeeReceiverSendsUpdate tests that receiving a fee update as channel
|
|
// initiator fails, and that trying to initiate fee update as non-initiation
|
|
// fails.
|
|
func TestUpdateFeeReceiverSendsUpdate(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
// Create a test channel which will be used for the duration of this
|
|
// unittest. The channel will be funded evenly with Alice having 5 BTC,
|
|
// and Bob having 5 BTC.
|
|
aliceChannel, bobChannel, cleanUp, err := createTestChannels(1)
|
|
if err != nil {
|
|
t.Fatalf("unable to create test channels: %v", err)
|
|
}
|
|
defer cleanUp()
|
|
|
|
// Since Alice is the channel initiator, she should fail when receiving
|
|
// fee update
|
|
fee := btcutil.Amount(111)
|
|
err = aliceChannel.ReceiveUpdateFee(fee)
|
|
if err == nil {
|
|
t.Fatalf("expected alice to fail receiving fee update")
|
|
}
|
|
|
|
// Similarly, initiating fee update should fail for Bob.
|
|
err = bobChannel.UpdateFee(fee)
|
|
if err == nil {
|
|
t.Fatalf("expected bob to fail initiating fee update")
|
|
}
|
|
}
|
|
|
|
// Test that if multiple update fee messages are sent consecutively, then the
|
|
// last one is the one that is being committed to.
|
|
func TestUpdateFeeMultipleUpdates(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
// Create a test channel which will be used for the duration of this
|
|
// unittest. The channel will be funded evenly with Alice having 5 BTC,
|
|
// and Bob having 5 BTC.
|
|
aliceChannel, bobChannel, cleanUp, err := createTestChannels(1)
|
|
if err != nil {
|
|
t.Fatalf("unable to create test channels: %v", err)
|
|
}
|
|
defer cleanUp()
|
|
|
|
// Simulate Alice sending update fee message to bob.
|
|
fee1 := btcutil.Amount(111)
|
|
fee2 := btcutil.Amount(222)
|
|
fee := btcutil.Amount(333)
|
|
aliceChannel.UpdateFee(fee1)
|
|
aliceChannel.UpdateFee(fee2)
|
|
aliceChannel.UpdateFee(fee)
|
|
|
|
// Alice signs a commitment, which will cover everything sent to Bob
|
|
// (the HTLC and the fee update), and everything acked by Bob (nothing
|
|
// so far).
|
|
aliceSig, aliceHtlcSigs, err := aliceChannel.SignNextCommitment()
|
|
if err != nil {
|
|
t.Fatalf("alice unable to sign commitment: %v", err)
|
|
}
|
|
|
|
bobChannel.ReceiveUpdateFee(fee1)
|
|
bobChannel.ReceiveUpdateFee(fee2)
|
|
bobChannel.ReceiveUpdateFee(fee)
|
|
|
|
// Bob receives this signature message, and verifies that it is
|
|
// consistent with the state he had for Alice, including the received
|
|
// HTLC and fee update.
|
|
err = bobChannel.ReceiveNewCommitment(aliceSig, aliceHtlcSigs)
|
|
if err != nil {
|
|
t.Fatalf("bob unable to process alice's new commitment: %v", err)
|
|
}
|
|
|
|
if bobChannel.channelState.LocalCommitment.FeePerKw == fee {
|
|
t.Fatalf("bob's feePerKw was unexpectedly locked in")
|
|
}
|
|
|
|
// Alice sending more fee updates now should not mess up the old fee
|
|
// they both committed to.
|
|
fee3 := btcutil.Amount(444)
|
|
fee4 := btcutil.Amount(555)
|
|
fee5 := btcutil.Amount(666)
|
|
aliceChannel.UpdateFee(fee3)
|
|
aliceChannel.UpdateFee(fee4)
|
|
aliceChannel.UpdateFee(fee5)
|
|
bobChannel.ReceiveUpdateFee(fee3)
|
|
bobChannel.ReceiveUpdateFee(fee4)
|
|
bobChannel.ReceiveUpdateFee(fee5)
|
|
|
|
// Bob can revoke the prior commitment he had. This should lock in the
|
|
// fee update for him.
|
|
bobRevocation, err := bobChannel.RevokeCurrentCommitment()
|
|
if err != nil {
|
|
t.Fatalf("unable to generate bob revocation: %v", err)
|
|
}
|
|
|
|
if bobChannel.channelState.LocalCommitment.FeePerKw != fee {
|
|
t.Fatalf("bob's feePerKw was not locked in")
|
|
}
|
|
|
|
// Bob commits to all updates he has received from Alice. This includes
|
|
// the HTLC he received, and the fee update.
|
|
bobSig, bobHtlcSigs, err := bobChannel.SignNextCommitment()
|
|
if err != nil {
|
|
t.Fatalf("bob unable to sign alice's commitment: %v", err)
|
|
}
|
|
|
|
// Alice receives the revocation of the old one, and can now assume that
|
|
// Bob's received everything up to the signature she sent, including the
|
|
// HTLC and fee update.
|
|
if _, err := aliceChannel.ReceiveRevocation(bobRevocation); err != nil {
|
|
t.Fatalf("alice unable to rocess bob's revocation: %v", err)
|
|
}
|
|
|
|
// Alice receives new signature from Bob, and assumes this covers the
|
|
// changes.
|
|
if err := aliceChannel.ReceiveNewCommitment(bobSig, bobHtlcSigs); err != nil {
|
|
t.Fatalf("alice unable to process bob's new commitment: %v", err)
|
|
}
|
|
|
|
if aliceChannel.channelState.LocalCommitment.FeePerKw == fee {
|
|
t.Fatalf("alice's feePerKw was unexpectedly locked in")
|
|
}
|
|
|
|
// Alice can revoke the old commitment, which will lock in the fee
|
|
// update.
|
|
aliceRevocation, err := aliceChannel.RevokeCurrentCommitment()
|
|
if err != nil {
|
|
t.Fatalf("unable to revoke alice channel: %v", err)
|
|
}
|
|
|
|
if aliceChannel.channelState.LocalCommitment.FeePerKw != fee {
|
|
t.Fatalf("alice's feePerKw was not locked in")
|
|
}
|
|
|
|
// Bob receives revocation from Alice.
|
|
if _, err := bobChannel.ReceiveRevocation(aliceRevocation); err != nil {
|
|
t.Fatalf("bob unable to process alice's revocation: %v", err)
|
|
}
|
|
}
|
|
|
|
// TestAddHTLCNegativeBalance tests that if enough HTLC's are added to the
|
|
// state machine to drive the balance to zero, then the next HTLC attempted to
|
|
// be added will result in an error being returned.
|
|
func TestAddHTLCNegativeBalance(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
// We'll kick off the test by creating our channels which both are
|
|
// loaded with 5 BTC each.
|
|
aliceChannel, _, cleanUp, err := createTestChannels(1)
|
|
if err != nil {
|
|
t.Fatalf("unable to create test channels: %v", err)
|
|
}
|
|
defer cleanUp()
|
|
|
|
// First, we'll add 5 HTLCs of 1 BTC each to Alice's commitment.
|
|
const numHTLCs = 4
|
|
htlcAmt := lnwire.NewMSatFromSatoshis(btcutil.SatoshiPerBitcoin)
|
|
for i := 0; i < numHTLCs; i++ {
|
|
htlc, _ := createHTLC(i, htlcAmt)
|
|
if _, err := aliceChannel.AddHTLC(htlc); err != nil {
|
|
t.Fatalf("unable to add htlc: %v", err)
|
|
}
|
|
}
|
|
|
|
// We'll then craft another HTLC with 2 BTC to add to Alice's channel.
|
|
// This attempt should put Alice in the negative, meaning she should
|
|
// reject the HTLC.
|
|
htlc, _ := createHTLC(numHTLCs+1, htlcAmt*2)
|
|
_, err = aliceChannel.AddHTLC(htlc)
|
|
if err != ErrInsufficientBalance {
|
|
t.Fatalf("expected insufficient balance, instead got: %v", err)
|
|
}
|
|
}
|
|
|
|
// assertNoChanSyncNeeded is a helper function that asserts that upon restart,
|
|
// two channels conclude that they're fully synchronized and don't need to
|
|
// retransmit any new messages.
|
|
func assertNoChanSyncNeeded(t *testing.T, aliceChannel *LightningChannel,
|
|
bobChannel *LightningChannel) {
|
|
|
|
_, _, line, _ := runtime.Caller(1)
|
|
|
|
aliceChanSyncMsg, err := aliceChannel.ChanSyncMsg()
|
|
if err != nil {
|
|
t.Fatalf("line #%v: unable to produce chan sync msg: %v",
|
|
line, err)
|
|
}
|
|
bobMsgsToSend, err := bobChannel.ProcessChanSyncMsg(aliceChanSyncMsg)
|
|
if err != nil {
|
|
t.Fatalf("line #%v: unable to process ChannelReestablish "+
|
|
"msg: %v", line, err)
|
|
}
|
|
if len(bobMsgsToSend) != 0 {
|
|
t.Fatalf("line #%v: bob shouldn't have to send any messages, "+
|
|
"instead wants to send: %v", line, spew.Sdump(bobMsgsToSend))
|
|
}
|
|
|
|
bobChanSyncMsg, err := bobChannel.ChanSyncMsg()
|
|
if err != nil {
|
|
t.Fatalf("line #%v: unable to produce chan sync msg: %v",
|
|
line, err)
|
|
}
|
|
aliceMsgsToSend, err := aliceChannel.ProcessChanSyncMsg(bobChanSyncMsg)
|
|
if err != nil {
|
|
t.Fatalf("line #%v: unable to process ChannelReestablish "+
|
|
"msg: %v", line, err)
|
|
}
|
|
if len(bobMsgsToSend) != 0 {
|
|
t.Fatalf("line #%v: alice shouldn't have to send any "+
|
|
"messages, instead wants to send: %v", line,
|
|
spew.Sdump(aliceMsgsToSend))
|
|
}
|
|
}
|
|
|
|
// TestChanSyncFullySynced tests that after a successful commitment exchange,
|
|
// and a forced restart, both nodes conclude that they're fully synchronized
|
|
// and don't need to retransmit any messages.
|
|
func TestChanSyncFullySynced(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
// Create a test channel which will be used for the duration of this
|
|
// unittest. The channel will be funded evenly with Alice having 5 BTC,
|
|
// and Bob having 5 BTC.
|
|
aliceChannel, bobChannel, cleanUp, err := createTestChannels(1)
|
|
if err != nil {
|
|
t.Fatalf("unable to create test channels: %v", err)
|
|
}
|
|
defer cleanUp()
|
|
|
|
// If we exchange channel sync messages from the get-go , then both
|
|
// sides should conclude that no further synchronization is needed.
|
|
assertNoChanSyncNeeded(t, aliceChannel, bobChannel)
|
|
|
|
// Next, we'll create an HTLC for Alice to extend to Bob.
|
|
var paymentPreimage [32]byte
|
|
copy(paymentPreimage[:], bytes.Repeat([]byte{1}, 32))
|
|
paymentHash := sha256.Sum256(paymentPreimage[:])
|
|
htlcAmt := lnwire.NewMSatFromSatoshis(btcutil.SatoshiPerBitcoin)
|
|
htlc := &lnwire.UpdateAddHTLC{
|
|
PaymentHash: paymentHash,
|
|
Amount: htlcAmt,
|
|
Expiry: uint32(5),
|
|
}
|
|
aliceHtlcIndex, err := aliceChannel.AddHTLC(htlc)
|
|
if err != nil {
|
|
t.Fatalf("unable to add htlc: %v", err)
|
|
}
|
|
bobHtlcIndex, err := bobChannel.ReceiveHTLC(htlc)
|
|
if err != nil {
|
|
t.Fatalf("unable to recv htlc: %v", err)
|
|
}
|
|
|
|
// Then we'll initiate a state transition to lock in this new HTLC.
|
|
if err := forceStateTransition(aliceChannel, bobChannel); err != nil {
|
|
t.Fatalf("unable to complete alice's state transition: %v", err)
|
|
}
|
|
|
|
// At this point, if both sides generate a ChannelReestablish message,
|
|
// they should both conclude that they're fully in sync.
|
|
assertNoChanSyncNeeded(t, aliceChannel, bobChannel)
|
|
|
|
// If bob settles the HTLC, and then initiates a state transition, they
|
|
// should both still think that they're in sync.
|
|
err = bobChannel.SettleHTLC(paymentPreimage, bobHtlcIndex)
|
|
if err != nil {
|
|
t.Fatalf("unable to settle htlc: %v", err)
|
|
}
|
|
err = aliceChannel.ReceiveHTLCSettle(paymentPreimage, aliceHtlcIndex)
|
|
if err != nil {
|
|
t.Fatalf("unable to settle htlc: %v", err)
|
|
}
|
|
|
|
// Next, we'll complete Bob's state transition, and assert again that
|
|
// they think they're fully synced.
|
|
if err := forceStateTransition(bobChannel, aliceChannel); err != nil {
|
|
t.Fatalf("unable to complete bob's state transition: %v", err)
|
|
}
|
|
assertNoChanSyncNeeded(t, aliceChannel, bobChannel)
|
|
|
|
// Finally, if we simulate a restart on both sides, then both should
|
|
// still conclude that they don't need to synchronize their state.
|
|
alicePub := aliceChannel.channelState.IdentityPub
|
|
aliceChannels, err := aliceChannel.channelState.Db.FetchOpenChannels(
|
|
alicePub,
|
|
)
|
|
if err != nil {
|
|
t.Fatalf("unable to fetch channel: %v", err)
|
|
}
|
|
bobPub := bobChannel.channelState.IdentityPub
|
|
bobChannels, err := bobChannel.channelState.Db.FetchOpenChannels(bobPub)
|
|
if err != nil {
|
|
t.Fatalf("unable to fetch channel: %v", err)
|
|
}
|
|
notifier := aliceChannel.channelEvents
|
|
aliceChannelNew, err := NewLightningChannel(aliceChannel.signer,
|
|
notifier, aliceChannel.feeEstimator, aliceChannels[0])
|
|
if err != nil {
|
|
t.Fatalf("unable to create new channel: %v", err)
|
|
}
|
|
defer aliceChannelNew.Stop()
|
|
bobChannelNew, err := NewLightningChannel(bobChannel.signer, notifier,
|
|
bobChannel.feeEstimator, bobChannels[0])
|
|
if err != nil {
|
|
t.Fatalf("unable to create new channel: %v", err)
|
|
}
|
|
defer bobChannelNew.Stop()
|
|
|
|
assertNoChanSyncNeeded(t, aliceChannelNew, bobChannelNew)
|
|
}
|
|
|
|
// restartChannel reads the passe channel from disk, and returns a newly
|
|
// initialized instance. This simulates one party restarting and losing their
|
|
// in memory state.
|
|
func restartChannel(channelOld *LightningChannel) (*LightningChannel, error) {
|
|
nodePub := channelOld.channelState.IdentityPub
|
|
nodeChannels, err := channelOld.channelState.Db.FetchOpenChannels(
|
|
nodePub,
|
|
)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
notifier := channelOld.channelEvents
|
|
channelNew, err := NewLightningChannel(channelOld.signer,
|
|
notifier, channelOld.feeEstimator, nodeChannels[0])
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return channelNew, nil
|
|
}
|
|
|
|
// TestChanSyncOweCommitment tests that if Bob restarts (and then Alice) before
|
|
// he receives Alice's CommitSig message, then Alice concludes that she needs
|
|
// to re-send the CommitDiff. After the diff has been sent, both nodes should
|
|
// resynchronize and be able to complete the dangling commit.
|
|
func TestChanSyncOweCommitment(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
// Create a test channel which will be used for the duration of this
|
|
// unittest. The channel will be funded evenly with Alice having 5 BTC,
|
|
// and Bob having 5 BTC.
|
|
aliceChannel, bobChannel, cleanUp, err := createTestChannels(1)
|
|
if err != nil {
|
|
t.Fatalf("unable to create test channels: %v", err)
|
|
}
|
|
defer cleanUp()
|
|
|
|
var fakeOnionBlob [lnwire.OnionPacketSize]byte
|
|
copy(fakeOnionBlob[:], bytes.Repeat([]byte{0x05}, lnwire.OnionPacketSize))
|
|
|
|
// We'll start off the scenario with Bob sending 3 HTLC's to Alice in a
|
|
// single state update.
|
|
htlcAmt := lnwire.NewMSatFromSatoshis(20000)
|
|
const numBobHtlcs = 3
|
|
var bobPreimage [32]byte
|
|
copy(bobPreimage[:], bytes.Repeat([]byte{0xbb}, 32))
|
|
for i := 0; i < 3; i++ {
|
|
rHash := sha256.Sum256(bobPreimage[:])
|
|
h := &lnwire.UpdateAddHTLC{
|
|
PaymentHash: rHash,
|
|
Amount: htlcAmt,
|
|
Expiry: uint32(10),
|
|
OnionBlob: fakeOnionBlob,
|
|
}
|
|
|
|
htlcIndex, err := bobChannel.AddHTLC(h)
|
|
if err != nil {
|
|
t.Fatalf("unable to add bob's htlc: %v", err)
|
|
}
|
|
|
|
h.ID = htlcIndex
|
|
if _, err := aliceChannel.ReceiveHTLC(h); err != nil {
|
|
t.Fatalf("unable to recv bob's htlc: %v", err)
|
|
}
|
|
}
|
|
|
|
chanID := lnwire.NewChanIDFromOutPoint(
|
|
&aliceChannel.channelState.FundingOutpoint,
|
|
)
|
|
|
|
// With the HTLC's applied to both update logs, we'll initiate a state
|
|
// transition from Bob.
|
|
if err := forceStateTransition(bobChannel, aliceChannel); err != nil {
|
|
t.Fatalf("unable to complete bob's state transition: %v", err)
|
|
}
|
|
|
|
// Next, Alice's settles all 3 HTLC's from Bob, and also adds a new
|
|
// HTLC of her own.
|
|
for i := 0; i < 3; i++ {
|
|
err := aliceChannel.SettleHTLC(bobPreimage, uint64(i))
|
|
if err != nil {
|
|
t.Fatalf("unable to settle htlc: %v", err)
|
|
}
|
|
err = bobChannel.ReceiveHTLCSettle(bobPreimage, uint64(i))
|
|
if err != nil {
|
|
t.Fatalf("unable to settle htlc: %v", err)
|
|
}
|
|
}
|
|
var alicePreimage [32]byte
|
|
copy(alicePreimage[:], bytes.Repeat([]byte{0xaa}, 32))
|
|
rHash := sha256.Sum256(alicePreimage[:])
|
|
aliceHtlc := &lnwire.UpdateAddHTLC{
|
|
ChanID: chanID,
|
|
PaymentHash: rHash,
|
|
Amount: htlcAmt,
|
|
Expiry: uint32(10),
|
|
OnionBlob: fakeOnionBlob,
|
|
}
|
|
aliceHtlcIndex, err := aliceChannel.AddHTLC(aliceHtlc)
|
|
if err != nil {
|
|
t.Fatalf("unable to add alice's htlc: %v", err)
|
|
}
|
|
bobHtlcIndex, err := bobChannel.ReceiveHTLC(aliceHtlc)
|
|
if err != nil {
|
|
t.Fatalf("unable to recv alice's htlc: %v", err)
|
|
}
|
|
|
|
// Now we'll begin the core of the test itself. Alice will extend a new
|
|
// commitment to Bob, but the connection drops before Bob can process
|
|
// it.
|
|
aliceSig, aliceHtlcSigs, err := aliceChannel.SignNextCommitment()
|
|
if err != nil {
|
|
t.Fatalf("unable to sign commitment: %v", err)
|
|
}
|
|
|
|
// Bob doesn't get this message so upon reconnection, they need to
|
|
// synchronize. Alice should conclude that she owes Bob a commitment,
|
|
// while Bob should think he's properly synchronized.
|
|
aliceSyncMsg, err := aliceChannel.ChanSyncMsg()
|
|
if err != nil {
|
|
t.Fatalf("unable to produce chan sync msg: %v", err)
|
|
}
|
|
bobSyncMsg, err := bobChannel.ChanSyncMsg()
|
|
if err != nil {
|
|
t.Fatalf("unable to produce chan sync msg: %v", err)
|
|
}
|
|
|
|
// This is a helper function that asserts Alice concludes that she
|
|
// needs to retransmit the exact commitment that we failed to send
|
|
// above.
|
|
assertAliceCommitRetransmit := func() {
|
|
aliceMsgsToSend, err := aliceChannel.ProcessChanSyncMsg(
|
|
bobSyncMsg,
|
|
)
|
|
if err != nil {
|
|
t.Fatalf("unable to process chan sync msg: %v", err)
|
|
}
|
|
if len(aliceMsgsToSend) != 5 {
|
|
t.Fatalf("expected alice to send %v messages instead "+
|
|
"will send %v: %v", 5, len(aliceMsgsToSend),
|
|
spew.Sdump(aliceMsgsToSend))
|
|
}
|
|
|
|
// Each of the settle messages that Alice sent should match her
|
|
// original intent.
|
|
for i := 0; i < 3; i++ {
|
|
settleMsg, ok := aliceMsgsToSend[i].(*lnwire.UpdateFufillHTLC)
|
|
if !ok {
|
|
t.Fatalf("expected a htlc settle message, "+
|
|
"instead have %v", spew.Sdump(settleMsg))
|
|
}
|
|
if settleMsg.ID != uint64(i) {
|
|
t.Fatalf("wrong ID in settle msg: expected %v, "+
|
|
"got %v", i, settleMsg.ID)
|
|
}
|
|
if settleMsg.ChanID != chanID {
|
|
t.Fatalf("incorrect chan id: expected %v, got %v",
|
|
chanID, settleMsg.ChanID)
|
|
}
|
|
if settleMsg.PaymentPreimage != bobPreimage {
|
|
t.Fatalf("wrong pre-image: expected %v, got %v",
|
|
alicePreimage, settleMsg.PaymentPreimage)
|
|
}
|
|
}
|
|
|
|
// The HTLC add message should be identical.
|
|
if _, ok := aliceMsgsToSend[3].(*lnwire.UpdateAddHTLC); !ok {
|
|
t.Fatalf("expected a htlc add message, instead have %v",
|
|
spew.Sdump(aliceMsgsToSend[3]))
|
|
}
|
|
if !reflect.DeepEqual(aliceHtlc, aliceMsgsToSend[3]) {
|
|
t.Fatalf("htlc msg doesn't match exactly: "+
|
|
"expected %v got %v", spew.Sdump(aliceHtlc),
|
|
spew.Sdump(aliceMsgsToSend[3]))
|
|
}
|
|
|
|
// Next, we'll ensure that the CommitSig message exactly
|
|
// matches what Alice originally intended to send.
|
|
commitSigMsg, ok := aliceMsgsToSend[4].(*lnwire.CommitSig)
|
|
if !ok {
|
|
t.Fatalf("expected a CommitSig message, instead have %v",
|
|
spew.Sdump(aliceMsgsToSend[4]))
|
|
}
|
|
if !commitSigMsg.CommitSig.IsEqual(aliceSig) {
|
|
t.Fatalf("commit sig msgs don't match: expected %x got %x",
|
|
aliceSig.Serialize(), commitSigMsg.CommitSig.Serialize())
|
|
}
|
|
if len(commitSigMsg.HtlcSigs) != len(aliceHtlcSigs) {
|
|
t.Fatalf("wrong number of htlc sigs: expected %v, got %v",
|
|
len(aliceHtlcSigs), len(commitSigMsg.HtlcSigs))
|
|
}
|
|
for i, htlcSig := range commitSigMsg.HtlcSigs {
|
|
if !htlcSig.IsEqual(aliceHtlcSigs[i]) {
|
|
t.Fatalf("htlc sig msgs don't match: "+
|
|
"expected %x got %x",
|
|
aliceHtlcSigs[i].Serialize(),
|
|
htlcSig.Serialize())
|
|
}
|
|
}
|
|
}
|
|
|
|
// Alice should detect that she needs to re-send 5 messages: the 3
|
|
// settles, her HTLC add, and finally her commit sig message.
|
|
assertAliceCommitRetransmit()
|
|
|
|
// From Bob's Pov he has nothing else to send, so he should conclude he
|
|
// has no further action remaining.
|
|
bobMsgsToSend, err := bobChannel.ProcessChanSyncMsg(aliceSyncMsg)
|
|
if err != nil {
|
|
t.Fatalf("unable to process chan sync msg: %v", err)
|
|
}
|
|
if len(bobMsgsToSend) != 0 {
|
|
t.Fatalf("expected bob to send %v messages instead will "+
|
|
"send %v: %v", 5, len(bobMsgsToSend),
|
|
spew.Sdump(bobMsgsToSend))
|
|
}
|
|
|
|
// If we restart Alice, she should still conclude that she needs to
|
|
// send the exact same set of messages.
|
|
aliceChannel, err = restartChannel(aliceChannel)
|
|
if err != nil {
|
|
t.Fatalf("unable to restart alice: %v", err)
|
|
}
|
|
defer aliceChannel.Stop()
|
|
assertAliceCommitRetransmit()
|
|
|
|
// TODO(roasbeef): restart bob as well???
|
|
|
|
// At this point, we should be able to resume the prior state update
|
|
// without any issues, resulting in Alice settling the 3 htlc's, and
|
|
// adding one of her own.
|
|
err = bobChannel.ReceiveNewCommitment(aliceSig, aliceHtlcSigs)
|
|
if err != nil {
|
|
t.Fatalf("bob unable to process alice's commitment: %v", err)
|
|
}
|
|
bobRevocation, err := bobChannel.RevokeCurrentCommitment()
|
|
if err != nil {
|
|
t.Fatalf("unable to revoke bob commitment: %v", err)
|
|
}
|
|
bobSig, bobHtlcSigs, err := bobChannel.SignNextCommitment()
|
|
if err != nil {
|
|
t.Fatalf("bob unable to sign commitment: %v", err)
|
|
}
|
|
_, err = aliceChannel.ReceiveRevocation(bobRevocation)
|
|
if err != nil {
|
|
t.Fatalf("alice unable to recv revocation: %v", err)
|
|
}
|
|
err = aliceChannel.ReceiveNewCommitment(bobSig, bobHtlcSigs)
|
|
if err != nil {
|
|
t.Fatalf("alice unable to rev bob's commitment: %v", err)
|
|
}
|
|
aliceRevocation, err := aliceChannel.RevokeCurrentCommitment()
|
|
if err != nil {
|
|
t.Fatalf("alice unable to revoke commitment: %v", err)
|
|
}
|
|
if _, err := bobChannel.ReceiveRevocation(aliceRevocation); err != nil {
|
|
t.Fatalf("bob unable to recv revocation: %v", err)
|
|
}
|
|
|
|
// At this point, we'll now assert that their log states are what we
|
|
// expect.
|
|
//
|
|
// Alice's local log counter should be 4 and her HTLC index 3. She
|
|
// should detect Bob's remote log counter as being 3 and his HTLC index
|
|
// 3 as well.
|
|
if aliceChannel.localUpdateLog.logIndex != 4 {
|
|
t.Fatalf("incorrect log index: expected %v, got %v", 4,
|
|
aliceChannel.localUpdateLog.logIndex)
|
|
}
|
|
if aliceChannel.localUpdateLog.htlcCounter != 1 {
|
|
t.Fatalf("incorrect htlc index: expected %v, got %v", 1,
|
|
aliceChannel.localUpdateLog.htlcCounter)
|
|
}
|
|
if aliceChannel.remoteUpdateLog.logIndex != 3 {
|
|
t.Fatalf("incorrect log index: expected %v, got %v", 3,
|
|
aliceChannel.localUpdateLog.logIndex)
|
|
}
|
|
if aliceChannel.remoteUpdateLog.htlcCounter != 3 {
|
|
t.Fatalf("incorrect htlc index: expected %v, got %v", 3,
|
|
aliceChannel.localUpdateLog.htlcCounter)
|
|
}
|
|
|
|
// Bob should also have the same state, but mirrored.
|
|
if bobChannel.localUpdateLog.logIndex != 3 {
|
|
t.Fatalf("incorrect log index: expected %v, got %v", 3,
|
|
bobChannel.localUpdateLog.logIndex)
|
|
}
|
|
if bobChannel.localUpdateLog.htlcCounter != 3 {
|
|
t.Fatalf("incorrect htlc index: expected %v, got %v", 3,
|
|
bobChannel.localUpdateLog.htlcCounter)
|
|
}
|
|
if bobChannel.remoteUpdateLog.logIndex != 4 {
|
|
t.Fatalf("incorrect log index: expected %v, got %v", 4,
|
|
bobChannel.localUpdateLog.logIndex)
|
|
}
|
|
if bobChannel.remoteUpdateLog.htlcCounter != 1 {
|
|
t.Fatalf("incorrect htlc index: expected %v, got %v", 1,
|
|
bobChannel.localUpdateLog.htlcCounter)
|
|
}
|
|
|
|
// We'll conclude the test by having Bob settle Alice's HTLC, then
|
|
// initiate a state transition.
|
|
err = bobChannel.SettleHTLC(alicePreimage, bobHtlcIndex)
|
|
if err != nil {
|
|
t.Fatalf("unable to settle htlc: %v", err)
|
|
}
|
|
err = aliceChannel.ReceiveHTLCSettle(alicePreimage, aliceHtlcIndex)
|
|
if err != nil {
|
|
t.Fatalf("unable to settle htlc: %v", err)
|
|
}
|
|
if err := forceStateTransition(bobChannel, aliceChannel); err != nil {
|
|
t.Fatalf("unable to complete bob's state transition: %v", err)
|
|
}
|
|
|
|
// At this point, the final balances of both parties should properly
|
|
// reflect the amount of HTLC's sent.
|
|
bobMsatSent := numBobHtlcs * htlcAmt
|
|
if aliceChannel.channelState.TotalMSatSent != htlcAmt {
|
|
t.Fatalf("wrong value for msat sent: expected %v, got %v",
|
|
htlcAmt, aliceChannel.channelState.TotalMSatSent)
|
|
}
|
|
if aliceChannel.channelState.TotalMSatReceived != bobMsatSent {
|
|
t.Fatalf("wrong value for msat recv: expected %v, got %v",
|
|
bobMsatSent, aliceChannel.channelState.TotalMSatReceived)
|
|
}
|
|
if bobChannel.channelState.TotalMSatSent != bobMsatSent {
|
|
t.Fatalf("wrong value for msat sent: expected %v, got %v",
|
|
bobMsatSent, bobChannel.channelState.TotalMSatSent)
|
|
}
|
|
if bobChannel.channelState.TotalMSatReceived != htlcAmt {
|
|
t.Fatalf("wrong value for msat recv: expected %v, got %v",
|
|
htlcAmt, bobChannel.channelState.TotalMSatReceived)
|
|
}
|
|
}
|
|
|
|
// TestChanSyncOweRevocation tests that if Bob restarts (and then Alice) before
|
|
// he receiver's Alice's RevokeAndAck message, then Alice concludes that she
|
|
// needs to re-send the RevokeAndAck. After the revocation has been sent, both
|
|
// nodes should be able to successfully complete another state transition.
|
|
func TestChanSyncOweRevocation(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
// Create a test channel which will be used for the duration of this
|
|
// unittest. The channel will be funded evenly with Alice having 5 BTC,
|
|
// and Bob having 5 BTC.
|
|
aliceChannel, bobChannel, cleanUp, err := createTestChannels(1)
|
|
if err != nil {
|
|
t.Fatalf("unable to create test channels: %v", err)
|
|
}
|
|
defer cleanUp()
|
|
|
|
chanID := lnwire.NewChanIDFromOutPoint(
|
|
&aliceChannel.channelState.FundingOutpoint,
|
|
)
|
|
|
|
// We'll start the test with Bob extending a single HTLC to Alice, and
|
|
// then initiating a state transition.
|
|
htlcAmt := lnwire.NewMSatFromSatoshis(20000)
|
|
var bobPreimage [32]byte
|
|
copy(bobPreimage[:], bytes.Repeat([]byte{0xaa}, 32))
|
|
rHash := sha256.Sum256(bobPreimage[:])
|
|
bobHtlc := &lnwire.UpdateAddHTLC{
|
|
ChanID: chanID,
|
|
PaymentHash: rHash,
|
|
Amount: htlcAmt,
|
|
Expiry: uint32(10),
|
|
}
|
|
bobHtlcIndex, err := bobChannel.AddHTLC(bobHtlc)
|
|
if err != nil {
|
|
t.Fatalf("unable to add bob's htlc: %v", err)
|
|
}
|
|
aliceHtlcIndex, err := aliceChannel.ReceiveHTLC(bobHtlc)
|
|
if err != nil {
|
|
t.Fatalf("unable to recv bob's htlc: %v", err)
|
|
}
|
|
if err := forceStateTransition(bobChannel, aliceChannel); err != nil {
|
|
t.Fatalf("unable to complete bob's state transition: %v", err)
|
|
}
|
|
|
|
// Next, Alice will settle that single HTLC, the _begin_ the start of a
|
|
// state transition.
|
|
err = aliceChannel.SettleHTLC(bobPreimage, aliceHtlcIndex)
|
|
if err != nil {
|
|
t.Fatalf("unable to settle htlc: %v", err)
|
|
}
|
|
err = bobChannel.ReceiveHTLCSettle(bobPreimage, bobHtlcIndex)
|
|
if err != nil {
|
|
t.Fatalf("unable to settle htlc: %v", err)
|
|
}
|
|
|
|
// We'll model the state transition right up until Alice needs to send
|
|
// her revocation message to complete the state transition.
|
|
//
|
|
// Alice signs the next state, then Bob receives and sends his
|
|
// revocation message.
|
|
aliceSig, aliceHtlcSigs, err := aliceChannel.SignNextCommitment()
|
|
if err != nil {
|
|
t.Fatalf("unable to sign commitment: %v", err)
|
|
}
|
|
err = bobChannel.ReceiveNewCommitment(aliceSig, aliceHtlcSigs)
|
|
if err != nil {
|
|
t.Fatalf("bob unable to process alice's commitment: %v", err)
|
|
}
|
|
|
|
bobRevocation, err := bobChannel.RevokeCurrentCommitment()
|
|
if err != nil {
|
|
t.Fatalf("unable to revoke bob commitment: %v", err)
|
|
}
|
|
bobSig, bobHtlcSigs, err := bobChannel.SignNextCommitment()
|
|
if err != nil {
|
|
t.Fatalf("bob unable to sign commitment: %v", err)
|
|
}
|
|
|
|
_, err = aliceChannel.ReceiveRevocation(bobRevocation)
|
|
if err != nil {
|
|
t.Fatalf("alice unable to recv revocation: %v", err)
|
|
}
|
|
err = aliceChannel.ReceiveNewCommitment(bobSig, bobHtlcSigs)
|
|
if err != nil {
|
|
t.Fatalf("alice unable to rev bob's commitment: %v", err)
|
|
}
|
|
|
|
// At this point, we'll simulate the connection breaking down by Bob's
|
|
// lack of knowledge of the revocation message that Alice just sent.
|
|
aliceRevocation, err := aliceChannel.RevokeCurrentCommitment()
|
|
if err != nil {
|
|
t.Fatalf("alice unable to revoke commitment: %v", err)
|
|
}
|
|
|
|
// If we fetch the channel sync messages at this state, then Alice
|
|
// should report that she owes Bob a revocation message, while Bob
|
|
// thinks they're fully in sync.
|
|
aliceSyncMsg, err := aliceChannel.ChanSyncMsg()
|
|
if err != nil {
|
|
t.Fatalf("unable to produce chan sync msg: %v", err)
|
|
}
|
|
bobSyncMsg, err := bobChannel.ChanSyncMsg()
|
|
if err != nil {
|
|
t.Fatalf("unable to produce chan sync msg: %v", err)
|
|
}
|
|
|
|
assertAliceOwesRevoke := func() {
|
|
aliceMsgsToSend, err := aliceChannel.ProcessChanSyncMsg(bobSyncMsg)
|
|
if err != nil {
|
|
t.Fatalf("unable to process chan sync msg: %v", err)
|
|
}
|
|
if len(aliceMsgsToSend) != 1 {
|
|
t.Fatalf("expected single message retransmission from Alice, "+
|
|
"instead got %v", spew.Sdump(aliceMsgsToSend))
|
|
}
|
|
aliceReRevoke, ok := aliceMsgsToSend[0].(*lnwire.RevokeAndAck)
|
|
if !ok {
|
|
t.Fatalf("expected to retransmit revocation msg, instead "+
|
|
"have: %v", spew.Sdump(aliceMsgsToSend[0]))
|
|
}
|
|
|
|
// Alice should re-send the revocation message for her prior
|
|
// state.
|
|
expectedRevocation, err := aliceChannel.generateRevocation(
|
|
aliceChannel.currentHeight - 1,
|
|
)
|
|
if err != nil {
|
|
t.Fatalf("unable to regenerate revocation: %v", err)
|
|
}
|
|
if !reflect.DeepEqual(expectedRevocation, aliceReRevoke) {
|
|
t.Fatalf("wrong re-revocation: expected %v, got %v",
|
|
expectedRevocation, aliceReRevoke)
|
|
}
|
|
}
|
|
|
|
// From Bob's PoV he shouldn't think that he owes Alice any messages.
|
|
bobMsgsToSend, err := bobChannel.ProcessChanSyncMsg(aliceSyncMsg)
|
|
if err != nil {
|
|
t.Fatalf("unable to process chan sync msg: %v", err)
|
|
}
|
|
if len(bobMsgsToSend) != 0 {
|
|
t.Fatalf("expected bob to not retransmit, instead has: %v",
|
|
spew.Sdump(bobMsgsToSend))
|
|
}
|
|
|
|
// Alice should detect that she owes Bob a revocation message, and only
|
|
// that single message.
|
|
assertAliceOwesRevoke()
|
|
|
|
// If we restart Alice, then she should still decide that she owes a
|
|
// revocation message to Bob.
|
|
aliceChannel, err = restartChannel(aliceChannel)
|
|
if err != nil {
|
|
t.Fatalf("unable to restart alice: %v", err)
|
|
}
|
|
defer aliceChannel.Stop()
|
|
assertAliceOwesRevoke()
|
|
|
|
// TODO(roasbeef): restart bob too???
|
|
|
|
// We'll continue by then allowing bob to process Alice's revocation message.
|
|
if _, err := bobChannel.ReceiveRevocation(aliceRevocation); err != nil {
|
|
t.Fatalf("bob unable to recv revocation: %v", err)
|
|
}
|
|
|
|
// Finally, Alice will add an HTLC over her own such that we assert the
|
|
// channel can continue to receive updates.
|
|
var alicePreimage [32]byte
|
|
copy(bobPreimage[:], bytes.Repeat([]byte{0xaa}, 32))
|
|
rHash = sha256.Sum256(alicePreimage[:])
|
|
aliceHtlc := &lnwire.UpdateAddHTLC{
|
|
ChanID: chanID,
|
|
PaymentHash: rHash,
|
|
Amount: htlcAmt,
|
|
Expiry: uint32(10),
|
|
}
|
|
if _, err := aliceChannel.AddHTLC(aliceHtlc); err != nil {
|
|
t.Fatalf("unable to add alice's htlc: %v", err)
|
|
}
|
|
if _, err := bobChannel.ReceiveHTLC(aliceHtlc); err != nil {
|
|
t.Fatalf("unable to recv alice's htlc: %v", err)
|
|
}
|
|
if err := forceStateTransition(aliceChannel, bobChannel); err != nil {
|
|
t.Fatalf("unable to complete alice's state transition: %v", err)
|
|
}
|
|
|
|
// At this point, both sides should detect that they're fully synced.
|
|
assertNoChanSyncNeeded(t, aliceChannel, bobChannel)
|
|
}
|
|
|
|
// TestChanSyncOweRevocationAndCommit tests that if Alice initiates a state
|
|
// transition with Bob and Bob sends both a RevokeAndAck and CommitSig message
|
|
// but Alice doesn't receive them before the connection dies, then he'll
|
|
// retransmit them both.
|
|
func TestChanSyncOweRevocationAndCommit(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
// Create a test channel which will be used for the duration of this
|
|
// unittest. The channel will be funded evenly with Alice having 5 BTC,
|
|
// and Bob having 5 BTC.
|
|
aliceChannel, bobChannel, cleanUp, err := createTestChannels(1)
|
|
if err != nil {
|
|
t.Fatalf("unable to create test channels: %v", err)
|
|
}
|
|
defer cleanUp()
|
|
|
|
htlcAmt := lnwire.NewMSatFromSatoshis(20000)
|
|
|
|
// We'll kick off the test by having Bob send Alice an HTLC, then lock
|
|
// it in with a state transition.
|
|
var bobPreimage [32]byte
|
|
copy(bobPreimage[:], bytes.Repeat([]byte{0xaa}, 32))
|
|
rHash := sha256.Sum256(bobPreimage[:])
|
|
bobHtlc := &lnwire.UpdateAddHTLC{
|
|
PaymentHash: rHash,
|
|
Amount: htlcAmt,
|
|
Expiry: uint32(10),
|
|
}
|
|
bobHtlcIndex, err := bobChannel.AddHTLC(bobHtlc)
|
|
if err != nil {
|
|
t.Fatalf("unable to add bob's htlc: %v", err)
|
|
}
|
|
aliceHtlcIndex, err := aliceChannel.ReceiveHTLC(bobHtlc)
|
|
if err != nil {
|
|
t.Fatalf("unable to recv bob's htlc: %v", err)
|
|
}
|
|
if err := forceStateTransition(bobChannel, aliceChannel); err != nil {
|
|
t.Fatalf("unable to complete bob's state transition: %v", err)
|
|
}
|
|
|
|
// Next, Alice will settle that incoming HTLC, then we'll start the
|
|
// core of the test itself.
|
|
err = aliceChannel.SettleHTLC(bobPreimage, aliceHtlcIndex)
|
|
if err != nil {
|
|
t.Fatalf("unable to settle htlc: %v", err)
|
|
}
|
|
err = bobChannel.ReceiveHTLCSettle(bobPreimage, bobHtlcIndex)
|
|
if err != nil {
|
|
t.Fatalf("unable to settle htlc: %v", err)
|
|
}
|
|
|
|
// Progressing the exchange: Alice will send her signature, Bob will
|
|
// receive, send a revocation and also a signature for Alice's state.
|
|
aliceSig, aliceHtlcSigs, err := aliceChannel.SignNextCommitment()
|
|
if err != nil {
|
|
t.Fatalf("unable to sign commitment: %v", err)
|
|
}
|
|
err = bobChannel.ReceiveNewCommitment(aliceSig, aliceHtlcSigs)
|
|
if err != nil {
|
|
t.Fatalf("bob unable to process alice's commitment: %v", err)
|
|
}
|
|
|
|
// Bob generates the revoke and sig message, but the messages don't
|
|
// reach Alice before the connection dies.
|
|
bobRevocation, err := bobChannel.RevokeCurrentCommitment()
|
|
if err != nil {
|
|
t.Fatalf("unable to revoke bob commitment: %v", err)
|
|
}
|
|
bobSig, bobHtlcSigs, err := bobChannel.SignNextCommitment()
|
|
if err != nil {
|
|
t.Fatalf("bob unable to sign commitment: %v", err)
|
|
}
|
|
|
|
// If we now attempt to resync, then Alice should conclude that she
|
|
// doesn't need any further updates, while Bob concludes that he needs
|
|
// to re-send both his revocation and commit sig message.
|
|
aliceSyncMsg, err := aliceChannel.ChanSyncMsg()
|
|
if err != nil {
|
|
t.Fatalf("unable to produce chan sync msg: %v", err)
|
|
}
|
|
bobSyncMsg, err := bobChannel.ChanSyncMsg()
|
|
if err != nil {
|
|
t.Fatalf("unable to produce chan sync msg: %v", err)
|
|
}
|
|
|
|
aliceMsgsToSend, err := aliceChannel.ProcessChanSyncMsg(bobSyncMsg)
|
|
if err != nil {
|
|
t.Fatalf("unable to process chan sync msg: %v", err)
|
|
}
|
|
if len(aliceMsgsToSend) != 0 {
|
|
t.Fatalf("expected alice to not retransmit, instead she's "+
|
|
"sending: %v", spew.Sdump(aliceMsgsToSend))
|
|
}
|
|
|
|
assertBobSendsRevokeAndCommit := func() {
|
|
bobMsgsToSend, err := bobChannel.ProcessChanSyncMsg(aliceSyncMsg)
|
|
if err != nil {
|
|
t.Fatalf("unable to process chan sync msg: %v", err)
|
|
}
|
|
if len(bobMsgsToSend) != 2 {
|
|
t.Fatalf("expected bob to send %v messages, instead "+
|
|
"sends: %v", 2, spew.Sdump(bobMsgsToSend))
|
|
}
|
|
bobReRevoke, ok := bobMsgsToSend[0].(*lnwire.RevokeAndAck)
|
|
if !ok {
|
|
t.Fatalf("expected bob to re-send revoke, instead sending: %v",
|
|
spew.Sdump(bobMsgsToSend[0]))
|
|
}
|
|
if !reflect.DeepEqual(bobReRevoke, bobRevocation) {
|
|
t.Fatalf("revocation msgs don't match: expected %v, got %v",
|
|
bobRevocation, bobReRevoke)
|
|
}
|
|
|
|
bobReCommitSigMsg, ok := bobMsgsToSend[1].(*lnwire.CommitSig)
|
|
if !ok {
|
|
t.Fatalf("expected bob to re-send commit sig, instead sending: %v",
|
|
spew.Sdump(bobMsgsToSend[1]))
|
|
}
|
|
if !bobReCommitSigMsg.CommitSig.IsEqual(bobSig) {
|
|
t.Fatalf("commit sig msgs don't match: expected %x got %x",
|
|
bobSig.Serialize(), bobReCommitSigMsg.CommitSig.Serialize())
|
|
}
|
|
if len(bobReCommitSigMsg.HtlcSigs) != len(bobHtlcSigs) {
|
|
t.Fatalf("wrong number of htlc sigs: expected %v, got %v",
|
|
len(bobHtlcSigs), len(bobReCommitSigMsg.HtlcSigs))
|
|
}
|
|
for i, htlcSig := range bobReCommitSigMsg.HtlcSigs {
|
|
if !htlcSig.IsEqual(aliceHtlcSigs[i]) {
|
|
t.Fatalf("htlc sig msgs don't match: "+
|
|
"expected %x got %x",
|
|
bobHtlcSigs[i].Serialize(),
|
|
htlcSig.Serialize())
|
|
}
|
|
}
|
|
}
|
|
|
|
// We expect Bob to send exactly two messages: first his revocation
|
|
// message to Alice, and second his original commit sig message.
|
|
assertBobSendsRevokeAndCommit()
|
|
|
|
// At this point we simulate the connection failing with a restart from
|
|
// Bob. He should still re-send the exact same set of messages.
|
|
bobChannel, err = restartChannel(bobChannel)
|
|
if err != nil {
|
|
t.Fatalf("unable to restart channel: %v", err)
|
|
}
|
|
defer bobChannel.Stop()
|
|
assertBobSendsRevokeAndCommit()
|
|
|
|
// We'll now finish the state transition by having Alice process both
|
|
// messages, and send her final revocation.
|
|
_, err = aliceChannel.ReceiveRevocation(bobRevocation)
|
|
if err != nil {
|
|
t.Fatalf("alice unable to recv revocation: %v", err)
|
|
}
|
|
err = aliceChannel.ReceiveNewCommitment(bobSig, bobHtlcSigs)
|
|
if err != nil {
|
|
t.Fatalf("alice unable to rev bob's commitment: %v", err)
|
|
}
|
|
aliceRevocation, err := aliceChannel.RevokeCurrentCommitment()
|
|
if err != nil {
|
|
t.Fatalf("alice unable to revoke commitment: %v", err)
|
|
}
|
|
if _, err := bobChannel.ReceiveRevocation(aliceRevocation); err != nil {
|
|
t.Fatalf("bob unable to recv revocation: %v", err)
|
|
}
|
|
}
|
|
|
|
// TestChanSyncOweRevocationAndCommitForceTransition tests that if Alice
|
|
// initiates a state transition with Bob, but Alice fails to receive his
|
|
// RevokeAndAck and the connection dies before Bob sends his CommitSig message,
|
|
// then Bob will re-send her RevokeAndAck message. Bob will also send and
|
|
// _identical_ CommitSig as he detects his commitment chain is ahead of
|
|
// Alice's.
|
|
func TestChanSyncOweRevocationAndCommitForceTransition(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
// Create a test channel which will be used for the duration of this
|
|
// unittest. The channel will be funded evenly with Alice having 5 BTC,
|
|
// and Bob having 5 BTC.
|
|
aliceChannel, bobChannel, cleanUp, err := createTestChannels(1)
|
|
if err != nil {
|
|
t.Fatalf("unable to create test channels: %v", err)
|
|
}
|
|
defer cleanUp()
|
|
|
|
htlcAmt := lnwire.NewMSatFromSatoshis(20000)
|
|
|
|
// We'll kick off the test by having Bob send Alice an HTLC, then lock
|
|
// it in with a state transition.
|
|
var bobPreimage [32]byte
|
|
copy(bobPreimage[:], bytes.Repeat([]byte{0xaa}, 32))
|
|
rHash := sha256.Sum256(bobPreimage[:])
|
|
bobHtlc := &lnwire.UpdateAddHTLC{
|
|
PaymentHash: rHash,
|
|
Amount: htlcAmt,
|
|
Expiry: uint32(10),
|
|
}
|
|
bobHtlcIndex, err := bobChannel.AddHTLC(bobHtlc)
|
|
if err != nil {
|
|
t.Fatalf("unable to add bob's htlc: %v", err)
|
|
}
|
|
aliceHtlcIndex, err := aliceChannel.ReceiveHTLC(bobHtlc)
|
|
if err != nil {
|
|
t.Fatalf("unable to recv bob's htlc: %v", err)
|
|
}
|
|
if err := forceStateTransition(bobChannel, aliceChannel); err != nil {
|
|
t.Fatalf("unable to complete bob's state transition: %v", err)
|
|
}
|
|
|
|
// Next, Alice will settle that incoming HTLC, then we'll start the
|
|
// core of the test itself.
|
|
err = aliceChannel.SettleHTLC(bobPreimage, aliceHtlcIndex)
|
|
if err != nil {
|
|
t.Fatalf("unable to settle htlc: %v", err)
|
|
}
|
|
err = bobChannel.ReceiveHTLCSettle(bobPreimage, bobHtlcIndex)
|
|
if err != nil {
|
|
t.Fatalf("unable to settle htlc: %v", err)
|
|
}
|
|
|
|
// Progressing the exchange: Alice will send her signature, with Bob
|
|
// processing the new state locally.
|
|
aliceSig, aliceHtlcSigs, err := aliceChannel.SignNextCommitment()
|
|
if err != nil {
|
|
t.Fatalf("unable to sign commitment: %v", err)
|
|
}
|
|
err = bobChannel.ReceiveNewCommitment(aliceSig, aliceHtlcSigs)
|
|
if err != nil {
|
|
t.Fatalf("bob unable to process alice's commitment: %v", err)
|
|
}
|
|
|
|
// Bob then sends his revocation message, but before Alice can process
|
|
// it (and before he scan send his CommitSig message), then connection
|
|
// dies.
|
|
bobRevocation, err := bobChannel.RevokeCurrentCommitment()
|
|
if err != nil {
|
|
t.Fatalf("unable to revoke bob commitment: %v", err)
|
|
}
|
|
|
|
// Now if we attempt to synchronize states at this point, Alice should
|
|
// detect that she owes nothing, while Bob should re-send both his
|
|
// RevokeAndAck as well as his commitment message.
|
|
aliceSyncMsg, err := aliceChannel.ChanSyncMsg()
|
|
if err != nil {
|
|
t.Fatalf("unable to produce chan sync msg: %v", err)
|
|
}
|
|
bobSyncMsg, err := bobChannel.ChanSyncMsg()
|
|
if err != nil {
|
|
t.Fatalf("unable to produce chan sync msg: %v", err)
|
|
}
|
|
|
|
aliceMsgsToSend, err := aliceChannel.ProcessChanSyncMsg(bobSyncMsg)
|
|
if err != nil {
|
|
t.Fatalf("unable to process chan sync msg: %v", err)
|
|
}
|
|
if len(aliceMsgsToSend) != 0 {
|
|
t.Fatalf("expected alice to not retransmit, instead she's "+
|
|
"sending: %v", spew.Sdump(aliceMsgsToSend))
|
|
}
|
|
|
|
// If we process Alice's sync message from Bob's PoV, then he should
|
|
// send his RevokeAndAck message again. Additionally, the CommitSig
|
|
// message that he sends should be sufficient to finalize the state
|
|
// transition.
|
|
bobMsgsToSend, err := bobChannel.ProcessChanSyncMsg(aliceSyncMsg)
|
|
if err != nil {
|
|
t.Fatalf("unable to process chan sync msg: %v", err)
|
|
}
|
|
if len(bobMsgsToSend) != 2 {
|
|
t.Fatalf("expected bob to send %v messages, instead "+
|
|
"sends: %v", 2, spew.Sdump(bobMsgsToSend))
|
|
}
|
|
bobReRevoke, ok := bobMsgsToSend[0].(*lnwire.RevokeAndAck)
|
|
if !ok {
|
|
t.Fatalf("expected bob to re-send revoke, instead sending: %v",
|
|
spew.Sdump(bobMsgsToSend[0]))
|
|
}
|
|
if !reflect.DeepEqual(bobReRevoke, bobRevocation) {
|
|
t.Fatalf("revocation msgs don't match: expected %v, got %v",
|
|
bobRevocation, bobReRevoke)
|
|
}
|
|
|
|
// The second message should be his CommitSig message that he never
|
|
// sent, but will send in order to force both states to synchronize.
|
|
bobReCommitSigMsg, ok := bobMsgsToSend[1].(*lnwire.CommitSig)
|
|
if !ok {
|
|
t.Fatalf("expected bob to re-send commit sig, instead sending: %v",
|
|
spew.Sdump(bobMsgsToSend[1]))
|
|
}
|
|
|
|
// At this point we simulate the connection failing with a restart from
|
|
// Bob. He should still re-send the exact same set of messages.
|
|
bobChannel, err = restartChannel(bobChannel)
|
|
if err != nil {
|
|
t.Fatalf("unable to restart channel: %v", err)
|
|
}
|
|
defer bobChannel.Stop()
|
|
if len(bobMsgsToSend) != 2 {
|
|
t.Fatalf("expected bob to send %v messages, instead "+
|
|
"sends: %v", 2, spew.Sdump(bobMsgsToSend))
|
|
}
|
|
bobReRevoke, ok = bobMsgsToSend[0].(*lnwire.RevokeAndAck)
|
|
if !ok {
|
|
t.Fatalf("expected bob to re-send revoke, instead sending: %v",
|
|
spew.Sdump(bobMsgsToSend[0]))
|
|
}
|
|
bobSigMsg, ok := bobMsgsToSend[1].(*lnwire.CommitSig)
|
|
if !ok {
|
|
t.Fatalf("expected bob to re-send commit sig, instead sending: %v",
|
|
spew.Sdump(bobMsgsToSend[1]))
|
|
}
|
|
if !reflect.DeepEqual(bobReRevoke, bobRevocation) {
|
|
t.Fatalf("revocation msgs don't match: expected %v, got %v",
|
|
bobRevocation, bobReRevoke)
|
|
}
|
|
if !bobReCommitSigMsg.CommitSig.IsEqual(bobSigMsg.CommitSig) {
|
|
t.Fatalf("commit sig msgs don't match: expected %x got %x",
|
|
bobSigMsg.CommitSig.Serialize(),
|
|
bobReCommitSigMsg.CommitSig.Serialize())
|
|
}
|
|
if len(bobReCommitSigMsg.HtlcSigs) != len(bobSigMsg.HtlcSigs) {
|
|
t.Fatalf("wrong number of htlc sigs: expected %v, got %v",
|
|
len(bobSigMsg.HtlcSigs), len(bobReCommitSigMsg.HtlcSigs))
|
|
}
|
|
for i, htlcSig := range bobReCommitSigMsg.HtlcSigs {
|
|
if htlcSig.IsEqual(bobSigMsg.HtlcSigs[i]) {
|
|
t.Fatalf("htlc sig msgs don't match: "+
|
|
"expected %x got %x",
|
|
bobSigMsg.HtlcSigs[i].Serialize(),
|
|
htlcSig.Serialize())
|
|
}
|
|
}
|
|
|
|
// Now, we'll continue the exchange, sending Bob's revocation and
|
|
// signature message to Alice, ending with Alice sending her revocation
|
|
// message to Bob.
|
|
_, err = aliceChannel.ReceiveRevocation(bobRevocation)
|
|
if err != nil {
|
|
t.Fatalf("alice unable to recv revocation: %v", err)
|
|
}
|
|
err = aliceChannel.ReceiveNewCommitment(
|
|
bobSigMsg.CommitSig, bobSigMsg.HtlcSigs,
|
|
)
|
|
if err != nil {
|
|
t.Fatalf("alice unable to rev bob's commitment: %v", err)
|
|
}
|
|
aliceRevocation, err := aliceChannel.RevokeCurrentCommitment()
|
|
if err != nil {
|
|
t.Fatalf("alice unable to revoke commitment: %v", err)
|
|
}
|
|
if _, err := bobChannel.ReceiveRevocation(aliceRevocation); err != nil {
|
|
t.Fatalf("bob unable to recv revocation: %v", err)
|
|
}
|
|
}
|
|
|
|
// TestFeeUpdateRejectInsaneFee tests that if the initiator tries to attach a
|
|
// fee that would put them below their current reserve, then it's rejected by
|
|
// the state machine.
|
|
func TestFeeUpdateRejectInsaneFee(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
// Create a test channel which will be used for the duration of this
|
|
// unittest. The channel will be funded evenly with Alice having 5 BTC,
|
|
// and Bob having 5 BTC.
|
|
aliceChannel, _, cleanUp, err := createTestChannels(1)
|
|
if err != nil {
|
|
t.Fatalf("unable to create test channels: %v", err)
|
|
}
|
|
defer cleanUp()
|
|
|
|
// Next, we'll try to add a fee rate to Alice which is 1,000,000x her
|
|
// starting fee rate.
|
|
startingFeeRate := aliceChannel.channelState.LocalCommitment.FeePerKw
|
|
newFeeRate := startingFeeRate * 1000000
|
|
|
|
// Both Alice and Bob should reject this new fee rate as it it far too
|
|
// large.
|
|
if err := aliceChannel.UpdateFee(newFeeRate); err == nil {
|
|
t.Fatalf("alice should've rejected fee update")
|
|
}
|
|
}
|
|
|
|
// TestChannelRetransmissionFeeUpdate tests that the initiator will include any
|
|
// pending fee updates if it needs to retransmit signatures.
|
|
func TestChannelRetransmissionFeeUpdate(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
// Create a test channel which will be used for the duration of this
|
|
// unittest. The channel will be funded evenly with Alice having 5 BTC,
|
|
// and Bob having 5 BTC.
|
|
aliceChannel, bobChannel, cleanUp, err := createTestChannels(1)
|
|
if err != nil {
|
|
t.Fatalf("unable to create test channels: %v", err)
|
|
}
|
|
defer cleanUp()
|
|
|
|
// First, we'll fetch the current fee rate present within the
|
|
// commitment transactions.
|
|
startingFeeRate := aliceChannel.channelState.LocalCommitment.FeePerKw
|
|
|
|
// Next, we'll start a commitment update, with Alice sending a new
|
|
// update to double the fee rate of the commitment.
|
|
newFeeRate := startingFeeRate * 2
|
|
if err := aliceChannel.UpdateFee(newFeeRate); err != nil {
|
|
t.Fatalf("unable to update fee for Alice's channel: %v", err)
|
|
}
|
|
if err := bobChannel.ReceiveUpdateFee(newFeeRate); err != nil {
|
|
t.Fatalf("unable to update fee for Bob's channel: %v", err)
|
|
}
|
|
|
|
// Now, Alice will send a new commitment to Bob, but we'll simulate a
|
|
// connection failure, so Bob doesn't get her signature.
|
|
aliceSig, aliceHtlcSigs, err := aliceChannel.SignNextCommitment()
|
|
if err != nil {
|
|
t.Fatalf("unable to sign commitment: %v", err)
|
|
}
|
|
|
|
// Restart both channels to simulate a connection restart.
|
|
aliceChannel, err = restartChannel(aliceChannel)
|
|
if err != nil {
|
|
t.Fatalf("unable to restart alice: %v", err)
|
|
}
|
|
defer aliceChannel.Stop()
|
|
bobChannel, err = restartChannel(bobChannel)
|
|
if err != nil {
|
|
t.Fatalf("unable to restart channel: %v", err)
|
|
}
|
|
defer bobChannel.Stop()
|
|
|
|
// Bob doesn't get this message so upon reconnection, they need to
|
|
// synchronize. Alice should conclude that she owes Bob a commitment,
|
|
// while Bob should think he's properly synchronized.
|
|
aliceSyncMsg, err := aliceChannel.ChanSyncMsg()
|
|
if err != nil {
|
|
t.Fatalf("unable to produce chan sync msg: %v", err)
|
|
}
|
|
bobSyncMsg, err := bobChannel.ChanSyncMsg()
|
|
if err != nil {
|
|
t.Fatalf("unable to produce chan sync msg: %v", err)
|
|
}
|
|
|
|
// Bob should detect that he doesn't need to send anything to Alice.
|
|
bobMsgsToSend, err := bobChannel.ProcessChanSyncMsg(aliceSyncMsg)
|
|
if err != nil {
|
|
t.Fatalf("unable to process chan sync msg: %v", err)
|
|
}
|
|
if len(bobMsgsToSend) != 0 {
|
|
t.Fatalf("expected bob to send %v messages instead "+
|
|
"will send %v: %v", 0, len(bobMsgsToSend),
|
|
spew.Sdump(bobMsgsToSend))
|
|
}
|
|
|
|
// When Alice processes Bob's chan sync message, she should realize
|
|
// that she needs to first send a new UpdateFee message, and also a
|
|
// CommitSig.
|
|
aliceMsgsToSend, err := aliceChannel.ProcessChanSyncMsg(
|
|
bobSyncMsg,
|
|
)
|
|
if err != nil {
|
|
t.Fatalf("unable to process chan sync msg: %v", err)
|
|
}
|
|
if len(aliceMsgsToSend) != 2 {
|
|
t.Fatalf("expected alice to send %v messages instead "+
|
|
"will send %v: %v", 2, len(aliceMsgsToSend),
|
|
spew.Sdump(aliceMsgsToSend))
|
|
}
|
|
|
|
// The first message should be an UpdateFee message.
|
|
retransFeeMsg, ok := aliceMsgsToSend[0].(*lnwire.UpdateFee)
|
|
if !ok {
|
|
t.Fatalf("expected UpdateFee message, instead have: %v",
|
|
spew.Sdump(aliceMsgsToSend[0]))
|
|
}
|
|
|
|
// The fee should match exactly the new fee update we applied above.
|
|
if retransFeeMsg.FeePerKw != uint32(newFeeRate) {
|
|
t.Fatalf("fee update doesn't match: expected %v, got %v",
|
|
uint32(newFeeRate), retransFeeMsg)
|
|
}
|
|
|
|
// The second, should be a CommitSig message, and be identical to the
|
|
// sig message she sent prior.
|
|
commitSigMsg, ok := aliceMsgsToSend[1].(*lnwire.CommitSig)
|
|
if !ok {
|
|
t.Fatalf("expected a CommitSig message, instead have %v",
|
|
spew.Sdump(aliceMsgsToSend[1]))
|
|
}
|
|
if !commitSigMsg.CommitSig.IsEqual(aliceSig) {
|
|
t.Fatalf("commit sig msgs don't match: expected %x got %x",
|
|
aliceSig.Serialize(), commitSigMsg.CommitSig.Serialize())
|
|
}
|
|
if len(commitSigMsg.HtlcSigs) != len(aliceHtlcSigs) {
|
|
t.Fatalf("wrong number of htlc sigs: expected %v, got %v",
|
|
len(aliceHtlcSigs), len(commitSigMsg.HtlcSigs))
|
|
}
|
|
for i, htlcSig := range commitSigMsg.HtlcSigs {
|
|
if !htlcSig.IsEqual(aliceHtlcSigs[i]) {
|
|
t.Fatalf("htlc sig msgs don't match: "+
|
|
"expected %x got %x",
|
|
aliceHtlcSigs[i].Serialize(),
|
|
htlcSig.Serialize())
|
|
}
|
|
}
|
|
|
|
// Now, we if re-apply the updates to Bob, we should be able to resume
|
|
// the commitment update as normal.
|
|
if err := bobChannel.ReceiveUpdateFee(newFeeRate); err != nil {
|
|
t.Fatalf("unable to update fee for Bob's channel: %v", err)
|
|
}
|
|
|
|
err = bobChannel.ReceiveNewCommitment(aliceSig, aliceHtlcSigs)
|
|
if err != nil {
|
|
t.Fatalf("bob unable to process alice's commitment: %v", err)
|
|
}
|
|
bobRevocation, err := bobChannel.RevokeCurrentCommitment()
|
|
if err != nil {
|
|
t.Fatalf("unable to revoke bob commitment: %v", err)
|
|
}
|
|
bobSig, bobHtlcSigs, err := bobChannel.SignNextCommitment()
|
|
if err != nil {
|
|
t.Fatalf("bob unable to sign commitment: %v", err)
|
|
}
|
|
_, err = aliceChannel.ReceiveRevocation(bobRevocation)
|
|
if err != nil {
|
|
t.Fatalf("alice unable to recv revocation: %v", err)
|
|
}
|
|
err = aliceChannel.ReceiveNewCommitment(bobSig, bobHtlcSigs)
|
|
if err != nil {
|
|
t.Fatalf("alice unable to rev bob's commitment: %v", err)
|
|
}
|
|
aliceRevocation, err := aliceChannel.RevokeCurrentCommitment()
|
|
if err != nil {
|
|
t.Fatalf("alice unable to revoke commitment: %v", err)
|
|
}
|
|
if _, err := bobChannel.ReceiveRevocation(aliceRevocation); err != nil {
|
|
t.Fatalf("bob unable to recv revocation: %v", err)
|
|
}
|
|
|
|
// Both parties should now have the latest fee rate locked-in.
|
|
if aliceChannel.channelState.LocalCommitment.FeePerKw != newFeeRate {
|
|
t.Fatalf("alice's feePerKw was not locked in")
|
|
}
|
|
if bobChannel.channelState.LocalCommitment.FeePerKw != newFeeRate {
|
|
t.Fatalf("bob's feePerKw was not locked in")
|
|
}
|
|
|
|
// Finally, we'll add with adding a new HTLC, then forcing a state
|
|
// transition. This should also proceed as normal.
|
|
var bobPreimage [32]byte
|
|
copy(bobPreimage[:], bytes.Repeat([]byte{0xaa}, 32))
|
|
rHash := sha256.Sum256(bobPreimage[:])
|
|
bobHtlc := &lnwire.UpdateAddHTLC{
|
|
PaymentHash: rHash,
|
|
Amount: lnwire.NewMSatFromSatoshis(20000),
|
|
Expiry: uint32(10),
|
|
}
|
|
if _, err := bobChannel.AddHTLC(bobHtlc); err != nil {
|
|
t.Fatalf("unable to add bob's htlc: %v", err)
|
|
}
|
|
if _, err := aliceChannel.ReceiveHTLC(bobHtlc); err != nil {
|
|
t.Fatalf("unable to recv bob's htlc: %v", err)
|
|
}
|
|
if err := forceStateTransition(bobChannel, aliceChannel); err != nil {
|
|
t.Fatalf("unable to complete bob's state transition: %v", err)
|
|
}
|
|
}
|
|
|
|
// TestChanSyncUnableToSync tests that if Alice or Bob receive an invalid
|
|
// ChannelReestablish messages,then they reject the message and declare the
|
|
// channel un-continuable by returning ErrCannotSyncCommitChains.
|
|
func TestChanSyncUnableToSync(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
// Create a test channel which will be used for the duration of this
|
|
// unittest. The channel will be funded evenly with Alice having 5 BTC,
|
|
// and Bob having 5 BTC.
|
|
aliceChannel, bobChannel, cleanUp, err := createTestChannels(1)
|
|
if err != nil {
|
|
t.Fatalf("unable to create test channels: %v", err)
|
|
}
|
|
defer cleanUp()
|
|
|
|
// If we immediately send both sides a "bogus" ChanSync message, then
|
|
// they both should conclude that they're unable to synchronize the
|
|
// state.
|
|
badChanSync := &lnwire.ChannelReestablish{
|
|
ChanID: lnwire.NewChanIDFromOutPoint(
|
|
&aliceChannel.channelState.FundingOutpoint,
|
|
),
|
|
NextLocalCommitHeight: 1000,
|
|
RemoteCommitTailHeight: 9000,
|
|
}
|
|
_, err = bobChannel.ProcessChanSyncMsg(badChanSync)
|
|
if err != ErrCannotSyncCommitChains {
|
|
t.Fatalf("expected error instead have: %v", err)
|
|
}
|
|
_, err = aliceChannel.ProcessChanSyncMsg(badChanSync)
|
|
if err != ErrCannotSyncCommitChains {
|
|
t.Fatalf("expected error instead have: %v", err)
|
|
}
|
|
}
|
|
|
|
// TestChanSyncInvalidLastSecret ensures that if Alice and Bob have completed
|
|
// state transitions in an existing channel, and then send a ChannelReestablish
|
|
// message after a restart, the following holds: if Alice has lost data, so she
|
|
// sends an invalid commit secret then both parties recognize this as possible
|
|
// data loss.
|
|
func TestChanSyncInvalidLastSecret(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
// Create a test channel which will be used for the duration of this
|
|
// unittest. The channel will be funded evenly with Alice having 5 BTC,
|
|
// and Bob having 5 BTC.
|
|
aliceChannel, bobChannel, cleanUp, err := createTestChannels(1)
|
|
if err != nil {
|
|
t.Fatalf("unable to create test channels: %v", err)
|
|
}
|
|
defer cleanUp()
|
|
|
|
// We'll create a new instances of Alice before doing any state updates
|
|
// such that we have the initial in memory state at the start of the
|
|
// channel.
|
|
aliceOld, err := restartChannel(aliceChannel)
|
|
if err != nil {
|
|
t.Fatalf("unable to restart alice")
|
|
}
|
|
|
|
// First, we'll add an HTLC, and then initiate a state transition
|
|
// between the two parties such that we actually have a prior
|
|
// revocation to send.
|
|
var paymentPreimage [32]byte
|
|
copy(paymentPreimage[:], bytes.Repeat([]byte{1}, 32))
|
|
paymentHash := sha256.Sum256(paymentPreimage[:])
|
|
htlcAmt := lnwire.NewMSatFromSatoshis(btcutil.SatoshiPerBitcoin)
|
|
htlc := &lnwire.UpdateAddHTLC{
|
|
PaymentHash: paymentHash,
|
|
Amount: htlcAmt,
|
|
Expiry: uint32(5),
|
|
}
|
|
if _, err := aliceChannel.AddHTLC(htlc); err != nil {
|
|
t.Fatalf("unable to add htlc: %v", err)
|
|
}
|
|
if _, err := bobChannel.ReceiveHTLC(htlc); err != nil {
|
|
t.Fatalf("unable to recv htlc: %v", err)
|
|
}
|
|
|
|
// Then we'll initiate a state transition to lock in this new HTLC.
|
|
if err := forceStateTransition(aliceChannel, bobChannel); err != nil {
|
|
t.Fatalf("unable to complete alice's state transition: %v", err)
|
|
}
|
|
|
|
// Next, we'll restart both parties in order to simulate a connection
|
|
// re-establishment.
|
|
aliceChannel, err = restartChannel(aliceChannel)
|
|
if err != nil {
|
|
t.Fatalf("unable to restart alice: %v", err)
|
|
}
|
|
bobChannel, err = restartChannel(bobChannel)
|
|
if err != nil {
|
|
t.Fatalf("unable to restart bob: %v", err)
|
|
}
|
|
|
|
// Next, we'll produce the ChanSync messages for both parties.
|
|
aliceChanSync, err := aliceChannel.ChanSyncMsg()
|
|
if err != nil {
|
|
t.Fatalf("unable to generate chan sync msg: %v", err)
|
|
}
|
|
bobChanSync, err := bobChannel.ChanSyncMsg()
|
|
if err != nil {
|
|
t.Fatalf("unable to generate chan sync msg: %v", err)
|
|
}
|
|
|
|
// We'll modify Alice's sync message to have an invalid commitment
|
|
// secret.
|
|
aliceChanSync.LastRemoteCommitSecret[4] ^= 0x01
|
|
|
|
// Alice's former self should conclude that she possibly lost data as
|
|
// Bob is sending a valid commit secret for the latest state.
|
|
_, err = aliceOld.ProcessChanSyncMsg(bobChanSync)
|
|
if err != ErrCommitSyncDataLoss {
|
|
t.Fatalf("wrong error, expected ErrCommitSyncDataLoss "+
|
|
"instead got: %v", err)
|
|
}
|
|
|
|
// Bob should conclude that he should force close the channel, as Alice
|
|
// cannot continue operation.
|
|
_, err = bobChannel.ProcessChanSyncMsg(aliceChanSync)
|
|
if err != ErrInvalidLastCommitSecret {
|
|
t.Fatalf("wrong error, expected ErrInvalidLastCommitSecret, "+
|
|
"instead got: %v", err)
|
|
}
|
|
}
|
|
|
|
// TestChanAvailableBandwidth tests the accuracy of the AvailableBalance()
|
|
// method. The value returned from this message should reflect the value
|
|
// returned within the commitment state of a channel after the transition is
|
|
// initiated.
|
|
func TestChanAvailableBandwidth(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
// Create a test channel which will be used for the duration of this
|
|
// unittest. The channel will be funded evenly with Alice having 5 BTC,
|
|
// and Bob having 5 BTC.
|
|
aliceChannel, bobChannel, cleanUp, err := createTestChannels(1)
|
|
if err != nil {
|
|
t.Fatalf("unable to create test channels: %v", err)
|
|
}
|
|
defer cleanUp()
|
|
|
|
assertBandwidthEstimateCorrect := func(aliceInitiate bool) {
|
|
// With the HTLC's added, we'll now query the AvailableBalance
|
|
// method for the current available channel bandwidth from
|
|
// Alice's PoV.
|
|
aliceAvailableBalance := aliceChannel.AvailableBalance()
|
|
|
|
// With this balance obtained, we'll now trigger a state update
|
|
// to actually determine what the current up to date balance
|
|
// is.
|
|
if aliceInitiate {
|
|
err := forceStateTransition(aliceChannel, bobChannel)
|
|
if err != nil {
|
|
t.Fatalf("unable to complete alice's state "+
|
|
"transition: %v", err)
|
|
}
|
|
} else {
|
|
err := forceStateTransition(bobChannel, aliceChannel)
|
|
if err != nil {
|
|
t.Fatalf("unable to complete alice's state "+
|
|
"transition: %v", err)
|
|
}
|
|
}
|
|
|
|
// Now, we'll obtain the current available bandwidth in Alice's
|
|
// latest commitment and compare that to the prior estimate.
|
|
aliceBalance := aliceChannel.channelState.LocalCommitment.LocalBalance
|
|
if aliceBalance != aliceAvailableBalance {
|
|
_, _, line, _ := runtime.Caller(1)
|
|
t.Fatalf("line: %v, incorrect balance: expected %v, "+
|
|
"got %v", line, aliceBalance,
|
|
aliceAvailableBalance)
|
|
}
|
|
}
|
|
|
|
// First, we'll add 3 outgoing HTLC's from Alice to Bob.
|
|
const numHtlcs = 3
|
|
var htlcAmt lnwire.MilliSatoshi = 100000
|
|
alicePreimages := make([][32]byte, numHtlcs)
|
|
for i := 0; i < numHtlcs; i++ {
|
|
htlc, preImage := createHTLC(i, htlcAmt)
|
|
if _, err := aliceChannel.AddHTLC(htlc); err != nil {
|
|
t.Fatalf("unable to add htlc: %v", err)
|
|
}
|
|
if _, err := bobChannel.ReceiveHTLC(htlc); err != nil {
|
|
t.Fatalf("unable to recv htlc: %v", err)
|
|
}
|
|
|
|
alicePreimages[i] = preImage
|
|
}
|
|
|
|
assertBandwidthEstimateCorrect(true)
|
|
|
|
// We'll repeat the same exercise, but with non-dust HTLCs. So we'll
|
|
// crank up the value of the HTLC's we're adding to the commitment
|
|
// transaction.
|
|
htlcAmt = lnwire.NewMSatFromSatoshis(30000)
|
|
for i := 0; i < numHtlcs; i++ {
|
|
htlc, preImage := createHTLC(numHtlcs+i, htlcAmt)
|
|
if _, err := aliceChannel.AddHTLC(htlc); err != nil {
|
|
t.Fatalf("unable to add htlc: %v", err)
|
|
}
|
|
if _, err := bobChannel.ReceiveHTLC(htlc); err != nil {
|
|
t.Fatalf("unable to recv htlc: %v", err)
|
|
}
|
|
|
|
alicePreimages = append(alicePreimages, preImage)
|
|
}
|
|
|
|
assertBandwidthEstimateCorrect(true)
|
|
|
|
// Next, we'll have Bob 5 of Alice's HTLC's, and cancel one of them (in
|
|
// the update log).
|
|
for i := 0; i < (numHtlcs*2)-1; i++ {
|
|
preImage := alicePreimages[i]
|
|
err := bobChannel.SettleHTLC(preImage, uint64(i))
|
|
if err != nil {
|
|
t.Fatalf("unable to settle htlc: %v", err)
|
|
}
|
|
err = aliceChannel.ReceiveHTLCSettle(preImage, uint64(i))
|
|
if err != nil {
|
|
t.Fatalf("unable to settle htlc: %v", err)
|
|
}
|
|
}
|
|
|
|
htlcIndex := uint64((numHtlcs * 2) - 1)
|
|
err = bobChannel.FailHTLC(htlcIndex, []byte("f"))
|
|
if err != nil {
|
|
t.Fatalf("unable to cancel HTLC: %v", err)
|
|
}
|
|
err = aliceChannel.ReceiveFailHTLC(htlcIndex, []byte("bad"))
|
|
if err != nil {
|
|
t.Fatalf("unable to recv htlc cancel: %v", err)
|
|
}
|
|
|
|
// With the HTLC's settled in the log, we'll now assert that if we
|
|
// initiate a state transition, then our guess was correct.
|
|
assertBandwidthEstimateCorrect(false)
|
|
|
|
// TODO(roasbeef): additional tests from diff starting conditions
|
|
}
|
|
|
|
// TestSignCommitmentFailNotLockedIn tests that a channel will not attempt to
|
|
// create a new state if it doesn't yet know of the next revocation point for
|
|
// the remote party.
|
|
func TestSignCommitmentFailNotLockedIn(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
// Create a test channel which will be used for the duration of this
|
|
// unittest. The channel will be funded evenly with Alice having 5 BTC,
|
|
// and Bob having 5 BTC.
|
|
aliceChannel, _, cleanUp, err := createTestChannels(1)
|
|
if err != nil {
|
|
t.Fatalf("unable to create test channels: %v", err)
|
|
}
|
|
defer cleanUp()
|
|
|
|
// Next, we'll modify Alice's internal state to omit knowledge of Bob's
|
|
// next revocation point.
|
|
aliceChannel.channelState.RemoteNextRevocation = nil
|
|
|
|
// If we now try to initiate a state update, then it should fail as
|
|
// Alice is unable to actually create a new state.
|
|
_, _, err = aliceChannel.SignNextCommitment()
|
|
if err != ErrNoWindow {
|
|
t.Fatalf("expected ErrNoWindow, instead have: %v", err)
|
|
}
|
|
}
|
|
|
|
// TestInvalidCommitSigError tests that if the remote party sends us an invalid
|
|
// commitment signature, then we'll reject it and return a special error that
|
|
// contains information to allow the remote party to debug their issues.
|
|
func TestInvalidCommitSigError(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
// First, we'll make a channel between Alice and Bob.
|
|
aliceChannel, bobChannel, cleanUp, err := createTestChannels(1)
|
|
if err != nil {
|
|
t.Fatalf("unable to create test channels: %v", err)
|
|
}
|
|
defer cleanUp()
|
|
|
|
// With the channel established, we'll now send a single HTLC from
|
|
// Alice to Bob.
|
|
var htlcAmt lnwire.MilliSatoshi = 100000
|
|
htlc, _ := createHTLC(0, htlcAmt)
|
|
if _, err := aliceChannel.AddHTLC(htlc); err != nil {
|
|
t.Fatalf("unable to add htlc: %v", err)
|
|
}
|
|
if _, err := bobChannel.ReceiveHTLC(htlc); err != nil {
|
|
t.Fatalf("unable to recv htlc: %v", err)
|
|
}
|
|
|
|
// Alice will now attempt to initiate a state transition.
|
|
aliceSig, aliceHtlcSigs, err := aliceChannel.SignNextCommitment()
|
|
if err != nil {
|
|
t.Fatalf("unable to sign new commit: %v", err)
|
|
}
|
|
|
|
// Before the signature gets to Bob, we'll mutate it, such that the
|
|
// signature is now actually invalid.
|
|
aliceSig.R.Add(aliceSig.R, new(big.Int).SetInt64(1))
|
|
|
|
// Bob should reject this new state, and return the proper error.
|
|
err = bobChannel.ReceiveNewCommitment(aliceSig, aliceHtlcSigs)
|
|
if err == nil {
|
|
t.Fatalf("bob accepted invalid state but shouldn't have")
|
|
}
|
|
if _, ok := err.(*InvalidCommitSigError); !ok {
|
|
t.Fatalf("bob sent incorrect error, expected %T, got %T",
|
|
&InvalidCommitSigError{}, err)
|
|
}
|
|
}
|
|
|
|
// TODO(roasbeef): testing.Quick test case for retrans!!!
|