1119 lines
29 KiB
Go
1119 lines
29 KiB
Go
// +build dev
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package wtclient_test
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import (
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"encoding/binary"
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"net"
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"sync"
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"testing"
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"time"
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"github.com/btcsuite/btcd/btcec"
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"github.com/btcsuite/btcd/chaincfg"
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"github.com/btcsuite/btcd/txscript"
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"github.com/btcsuite/btcd/wire"
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"github.com/btcsuite/btcutil"
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"github.com/lightningnetwork/lnd/input"
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"github.com/lightningnetwork/lnd/keychain"
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"github.com/lightningnetwork/lnd/lnwallet"
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"github.com/lightningnetwork/lnd/lnwire"
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"github.com/lightningnetwork/lnd/watchtower/blob"
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"github.com/lightningnetwork/lnd/watchtower/wtclient"
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"github.com/lightningnetwork/lnd/watchtower/wtdb"
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"github.com/lightningnetwork/lnd/watchtower/wtmock"
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"github.com/lightningnetwork/lnd/watchtower/wtpolicy"
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"github.com/lightningnetwork/lnd/watchtower/wtserver"
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)
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const csvDelay uint32 = 144
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var (
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revPrivBytes = []byte{
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0x8f, 0x4b, 0x51, 0x83, 0xa9, 0x34, 0xbd, 0x5f,
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0x74, 0x6c, 0x9d, 0x5c, 0xae, 0x88, 0x2d, 0x31,
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0x06, 0x90, 0xdd, 0x8c, 0x9b, 0x31, 0xbc, 0xd1,
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0x78, 0x91, 0x88, 0x2a, 0xf9, 0x74, 0xa0, 0xef,
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}
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toLocalPrivBytes = []byte{
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0xde, 0x17, 0xc1, 0x2f, 0xdc, 0x1b, 0xc0, 0xc6,
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0x59, 0x5d, 0xf9, 0xc1, 0x3e, 0x89, 0xbc, 0x6f,
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0x01, 0x85, 0x45, 0x76, 0x26, 0xce, 0x9c, 0x55,
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0x3b, 0xc9, 0xec, 0x3d, 0xd8, 0x8b, 0xac, 0xa8,
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}
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toRemotePrivBytes = []byte{
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0x28, 0x59, 0x6f, 0x36, 0xb8, 0x9f, 0x19, 0x5d,
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0xcb, 0x07, 0x48, 0x8a, 0xe5, 0x89, 0x71, 0x74,
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0x70, 0x4c, 0xff, 0x1e, 0x9c, 0x00, 0x93, 0xbe,
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0xe2, 0x2e, 0x68, 0x08, 0x4c, 0xb4, 0x0f, 0x4f,
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}
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// addr is the server's reward address given to watchtower clients.
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addr, _ = btcutil.DecodeAddress(
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"mrX9vMRYLfVy1BnZbc5gZjuyaqH3ZW2ZHz", &chaincfg.TestNet3Params,
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)
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addrScript, _ = txscript.PayToAddrScript(addr)
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)
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// randPrivKey generates a new secp keypair, and returns the public key.
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func randPrivKey(t *testing.T) *btcec.PrivateKey {
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t.Helper()
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sk, err := btcec.NewPrivateKey(btcec.S256())
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if err != nil {
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t.Fatalf("unable to generate pubkey: %v", err)
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}
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return sk
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}
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type mockNet struct {
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mu sync.RWMutex
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connCallback func(wtserver.Peer)
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}
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func newMockNet(cb func(wtserver.Peer)) *mockNet {
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return &mockNet{
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connCallback: cb,
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}
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}
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func (m *mockNet) Dial(network string, address string) (net.Conn, error) {
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return nil, nil
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}
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func (m *mockNet) LookupHost(host string) ([]string, error) {
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panic("not implemented")
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}
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func (m *mockNet) LookupSRV(service string, proto string, name string) (string, []*net.SRV, error) {
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panic("not implemented")
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}
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func (m *mockNet) ResolveTCPAddr(network string, address string) (*net.TCPAddr, error) {
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panic("not implemented")
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}
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func (m *mockNet) AuthDial(localPriv *btcec.PrivateKey, netAddr *lnwire.NetAddress,
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dialer func(string, string) (net.Conn, error)) (wtserver.Peer, error) {
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localPk := localPriv.PubKey()
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localAddr := &net.TCPAddr{
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IP: net.IP{0x32, 0x31, 0x30, 0x29},
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Port: 36723,
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}
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localPeer, remotePeer := wtmock.NewMockConn(
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localPk, netAddr.IdentityKey, localAddr, netAddr.Address, 0,
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)
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m.mu.RLock()
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m.connCallback(remotePeer)
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m.mu.RUnlock()
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return localPeer, nil
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}
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func (m *mockNet) setConnCallback(cb func(wtserver.Peer)) {
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m.mu.Lock()
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defer m.mu.Unlock()
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m.connCallback = cb
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}
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type mockChannel struct {
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mu sync.Mutex
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commitHeight uint64
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retributions map[uint64]*lnwallet.BreachRetribution
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localBalance lnwire.MilliSatoshi
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remoteBalance lnwire.MilliSatoshi
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revSK *btcec.PrivateKey
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revPK *btcec.PublicKey
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revKeyLoc keychain.KeyLocator
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toRemoteSK *btcec.PrivateKey
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toRemotePK *btcec.PublicKey
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toRemoteKeyLoc keychain.KeyLocator
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toLocalPK *btcec.PublicKey // only need to generate to-local script
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dustLimit lnwire.MilliSatoshi
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csvDelay uint32
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}
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func newMockChannel(t *testing.T, signer *wtmock.MockSigner,
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localAmt, remoteAmt lnwire.MilliSatoshi) *mockChannel {
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// Generate the revocation, to-local, and to-remote keypairs.
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revSK := randPrivKey(t)
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revPK := revSK.PubKey()
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toLocalSK := randPrivKey(t)
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toLocalPK := toLocalSK.PubKey()
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toRemoteSK := randPrivKey(t)
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toRemotePK := toRemoteSK.PubKey()
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// Register the revocation secret key and the to-remote secret key with
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// the signer. We will not need to sign with the to-local key, as this
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// is to be known only by the counterparty.
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revKeyLoc := signer.AddPrivKey(revSK)
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toRemoteKeyLoc := signer.AddPrivKey(toRemoteSK)
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c := &mockChannel{
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retributions: make(map[uint64]*lnwallet.BreachRetribution),
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localBalance: localAmt,
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remoteBalance: remoteAmt,
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revSK: revSK,
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revPK: revPK,
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revKeyLoc: revKeyLoc,
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toLocalPK: toLocalPK,
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toRemoteSK: toRemoteSK,
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toRemotePK: toRemotePK,
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toRemoteKeyLoc: toRemoteKeyLoc,
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dustLimit: 546000,
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csvDelay: 144,
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}
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// Create the initial remote commitment with the initial balances.
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c.createRemoteCommitTx(t)
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return c
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}
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func (c *mockChannel) createRemoteCommitTx(t *testing.T) {
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t.Helper()
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// Construct the to-local witness script.
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toLocalScript, err := input.CommitScriptToSelf(
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c.csvDelay, c.toLocalPK, c.revPK,
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)
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if err != nil {
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t.Fatalf("unable to create to-local script: %v", err)
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}
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// Compute the to-local witness script hash.
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toLocalScriptHash, err := input.WitnessScriptHash(toLocalScript)
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if err != nil {
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t.Fatalf("unable to create to-local witness script hash: %v", err)
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}
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// Compute the to-remote witness script hash.
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toRemoteScriptHash, err := input.CommitScriptUnencumbered(c.toRemotePK)
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if err != nil {
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t.Fatalf("unable to create to-remote script: %v", err)
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}
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// Construct the remote commitment txn, containing the to-local and
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// to-remote outputs. The balances are flipped since the transaction is
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// from the PoV of the remote party. We don't need any inputs for this
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// test. We increment the version with the commit height to ensure that
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// all commitment transactions are unique even if the same distribution
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// of funds is used more than once.
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commitTxn := &wire.MsgTx{
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Version: int32(c.commitHeight + 1),
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}
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var (
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toLocalSignDesc *input.SignDescriptor
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toRemoteSignDesc *input.SignDescriptor
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)
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var outputIndex int
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if c.remoteBalance >= c.dustLimit {
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commitTxn.TxOut = append(commitTxn.TxOut, &wire.TxOut{
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Value: int64(c.remoteBalance.ToSatoshis()),
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PkScript: toLocalScriptHash,
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})
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// Create the sign descriptor used to sign for the to-local
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// input.
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toLocalSignDesc = &input.SignDescriptor{
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KeyDesc: keychain.KeyDescriptor{
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KeyLocator: c.revKeyLoc,
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PubKey: c.revPK,
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},
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WitnessScript: toLocalScript,
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Output: commitTxn.TxOut[outputIndex],
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HashType: txscript.SigHashAll,
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}
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outputIndex++
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}
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if c.localBalance >= c.dustLimit {
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commitTxn.TxOut = append(commitTxn.TxOut, &wire.TxOut{
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Value: int64(c.localBalance.ToSatoshis()),
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PkScript: toRemoteScriptHash,
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})
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// Create the sign descriptor used to sign for the to-remote
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// input.
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toRemoteSignDesc = &input.SignDescriptor{
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KeyDesc: keychain.KeyDescriptor{
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KeyLocator: c.toRemoteKeyLoc,
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PubKey: c.toRemotePK,
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},
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WitnessScript: toRemoteScriptHash,
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Output: commitTxn.TxOut[outputIndex],
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HashType: txscript.SigHashAll,
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}
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outputIndex++
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}
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txid := commitTxn.TxHash()
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var (
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toLocalOutPoint wire.OutPoint
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toRemoteOutPoint wire.OutPoint
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)
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outputIndex = 0
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if toLocalSignDesc != nil {
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toLocalOutPoint = wire.OutPoint{
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Hash: txid,
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Index: uint32(outputIndex),
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}
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outputIndex++
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}
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if toRemoteSignDesc != nil {
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toRemoteOutPoint = wire.OutPoint{
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Hash: txid,
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Index: uint32(outputIndex),
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}
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outputIndex++
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}
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commitKeyRing := &lnwallet.CommitmentKeyRing{
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RevocationKey: c.revPK,
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NoDelayKey: c.toLocalPK,
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DelayKey: c.toRemotePK,
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}
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retribution := &lnwallet.BreachRetribution{
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BreachTransaction: commitTxn,
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RevokedStateNum: c.commitHeight,
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KeyRing: commitKeyRing,
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RemoteDelay: c.csvDelay,
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LocalOutpoint: toRemoteOutPoint,
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LocalOutputSignDesc: toRemoteSignDesc,
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RemoteOutpoint: toLocalOutPoint,
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RemoteOutputSignDesc: toLocalSignDesc,
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}
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c.retributions[c.commitHeight] = retribution
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c.commitHeight++
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}
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// advanceState creates the next channel state and retribution without altering
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// channel balances.
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func (c *mockChannel) advanceState(t *testing.T) {
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c.mu.Lock()
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defer c.mu.Unlock()
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c.createRemoteCommitTx(t)
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}
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// sendPayment creates the next channel state and retribution after transferring
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// amt to the remote party.
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func (c *mockChannel) sendPayment(t *testing.T, amt lnwire.MilliSatoshi) {
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t.Helper()
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c.mu.Lock()
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defer c.mu.Unlock()
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if c.localBalance < amt {
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t.Fatalf("insufficient funds to send, need: %v, have: %v",
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amt, c.localBalance)
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}
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c.localBalance -= amt
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c.remoteBalance += amt
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c.createRemoteCommitTx(t)
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}
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// receivePayment creates the next channel state and retribution after
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// transferring amt to the local party.
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func (c *mockChannel) receivePayment(t *testing.T, amt lnwire.MilliSatoshi) {
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t.Helper()
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c.mu.Lock()
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defer c.mu.Unlock()
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if c.remoteBalance < amt {
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t.Fatalf("insufficient funds to recv, need: %v, have: %v",
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amt, c.remoteBalance)
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}
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c.localBalance += amt
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c.remoteBalance -= amt
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c.createRemoteCommitTx(t)
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}
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// getState retrieves the channel's commitment and retribution at state i.
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func (c *mockChannel) getState(i uint64) (*wire.MsgTx, *lnwallet.BreachRetribution) {
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c.mu.Lock()
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defer c.mu.Unlock()
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retribution := c.retributions[i]
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return retribution.BreachTransaction, retribution
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}
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type testHarness struct {
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t *testing.T
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cfg harnessCfg
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signer *wtmock.MockSigner
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capacity lnwire.MilliSatoshi
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clientDB *wtmock.ClientDB
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clientCfg *wtclient.Config
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client wtclient.Client
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serverDB *wtdb.MockDB
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serverCfg *wtserver.Config
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server *wtserver.Server
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net *mockNet
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mu sync.Mutex
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channels map[lnwire.ChannelID]*mockChannel
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}
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type harnessCfg struct {
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localBalance lnwire.MilliSatoshi
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remoteBalance lnwire.MilliSatoshi
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policy wtpolicy.Policy
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noRegisterChan0 bool
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}
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func newHarness(t *testing.T, cfg harnessCfg) *testHarness {
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towerAddrStr := "18.28.243.2:9911"
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towerTCPAddr, err := net.ResolveTCPAddr("tcp", towerAddrStr)
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if err != nil {
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t.Fatalf("Unable to resolve tower TCP addr: %v", err)
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}
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privKey, err := btcec.NewPrivateKey(btcec.S256())
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if err != nil {
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t.Fatalf("Unable to generate tower private key: %v", err)
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}
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towerPubKey := privKey.PubKey()
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towerAddr := &lnwire.NetAddress{
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IdentityKey: towerPubKey,
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Address: towerTCPAddr,
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}
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const timeout = 200 * time.Millisecond
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serverDB := wtdb.NewMockDB()
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serverCfg := &wtserver.Config{
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DB: serverDB,
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ReadTimeout: timeout,
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WriteTimeout: timeout,
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NewAddress: func() (btcutil.Address, error) {
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return addr, nil
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},
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}
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server, err := wtserver.New(serverCfg)
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if err != nil {
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t.Fatalf("unable to create wtserver: %v", err)
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}
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signer := wtmock.NewMockSigner()
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mockNet := newMockNet(server.InboundPeerConnected)
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clientDB := wtmock.NewClientDB()
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clientCfg := &wtclient.Config{
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Signer: signer,
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Dial: func(string, string) (net.Conn, error) {
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return nil, nil
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},
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DB: clientDB,
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AuthDial: mockNet.AuthDial,
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PrivateTower: towerAddr,
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Policy: cfg.policy,
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NewAddress: func() ([]byte, error) {
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return addrScript, nil
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},
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ReadTimeout: timeout,
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WriteTimeout: timeout,
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MinBackoff: time.Millisecond,
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MaxBackoff: 10 * time.Millisecond,
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}
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client, err := wtclient.New(clientCfg)
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if err != nil {
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t.Fatalf("Unable to create wtclient: %v", err)
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}
|
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|
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if err := server.Start(); err != nil {
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t.Fatalf("Unable to start wtserver: %v", err)
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}
|
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|
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if err = client.Start(); err != nil {
|
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server.Stop()
|
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t.Fatalf("Unable to start wtclient: %v", err)
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}
|
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|
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h := &testHarness{
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t: t,
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cfg: cfg,
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signer: signer,
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capacity: cfg.localBalance + cfg.remoteBalance,
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clientDB: clientDB,
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clientCfg: clientCfg,
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client: client,
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serverDB: serverDB,
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serverCfg: serverCfg,
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server: server,
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net: mockNet,
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channels: make(map[lnwire.ChannelID]*mockChannel),
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}
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h.makeChannel(0, h.cfg.localBalance, h.cfg.remoteBalance)
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if !cfg.noRegisterChan0 {
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h.registerChannel(0)
|
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}
|
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|
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return h
|
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}
|
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|
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// startServer creates a new server using the harness's current serverCfg and
|
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// starts it after pointing the mockNet's callback to the new server.
|
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func (h *testHarness) startServer() {
|
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h.t.Helper()
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|
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var err error
|
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h.server, err = wtserver.New(h.serverCfg)
|
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if err != nil {
|
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h.t.Fatalf("unable to create wtserver: %v", err)
|
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}
|
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|
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h.net.setConnCallback(h.server.InboundPeerConnected)
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|
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if err := h.server.Start(); err != nil {
|
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h.t.Fatalf("unable to start wtserver: %v", err)
|
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}
|
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}
|
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|
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// startClient creates a new server using the harness's current clientCf and
|
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// starts it.
|
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func (h *testHarness) startClient() {
|
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h.t.Helper()
|
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|
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var err error
|
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h.client, err = wtclient.New(h.clientCfg)
|
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if err != nil {
|
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h.t.Fatalf("unable to create wtclient: %v", err)
|
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}
|
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if err := h.client.Start(); err != nil {
|
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h.t.Fatalf("unable to start wtclient: %v", err)
|
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}
|
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}
|
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|
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// chanIDFromInt creates a unique channel id given a unique integral id.
|
|
func chanIDFromInt(id uint64) lnwire.ChannelID {
|
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var chanID lnwire.ChannelID
|
|
binary.BigEndian.PutUint64(chanID[:8], id)
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return chanID
|
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}
|
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|
|
// makeChannel creates new channel with id, using the localAmt and remoteAmt as
|
|
// the starting balances. The channel will be available by using h.channel(id).
|
|
//
|
|
// NOTE: The method fails if channel for id already exists.
|
|
func (h *testHarness) makeChannel(id uint64,
|
|
localAmt, remoteAmt lnwire.MilliSatoshi) {
|
|
|
|
h.t.Helper()
|
|
|
|
chanID := chanIDFromInt(id)
|
|
c := newMockChannel(h.t, h.signer, localAmt, remoteAmt)
|
|
|
|
c.mu.Lock()
|
|
_, ok := h.channels[chanID]
|
|
if !ok {
|
|
h.channels[chanID] = c
|
|
}
|
|
c.mu.Unlock()
|
|
|
|
if ok {
|
|
h.t.Fatalf("channel %d already created", id)
|
|
}
|
|
}
|
|
|
|
// channel retrieves the channel corresponding to id.
|
|
//
|
|
// NOTE: The method fails if a channel for id does not exist.
|
|
func (h *testHarness) channel(id uint64) *mockChannel {
|
|
h.t.Helper()
|
|
|
|
h.mu.Lock()
|
|
c, ok := h.channels[chanIDFromInt(id)]
|
|
h.mu.Unlock()
|
|
if !ok {
|
|
h.t.Fatalf("unable to fetch channel %d", id)
|
|
}
|
|
|
|
return c
|
|
}
|
|
|
|
// registerChannel registers the channel identified by id with the client.
|
|
func (h *testHarness) registerChannel(id uint64) {
|
|
h.t.Helper()
|
|
|
|
chanID := chanIDFromInt(id)
|
|
err := h.client.RegisterChannel(chanID)
|
|
if err != nil {
|
|
h.t.Fatalf("unable to register channel %d: %v", id, err)
|
|
}
|
|
}
|
|
|
|
// advanceChannelN calls advanceState on the channel identified by id the number
|
|
// of provided times and returns the breach hints corresponding to the new
|
|
// states.
|
|
func (h *testHarness) advanceChannelN(id uint64, n int) []wtdb.BreachHint {
|
|
h.t.Helper()
|
|
|
|
channel := h.channel(id)
|
|
|
|
var hints []wtdb.BreachHint
|
|
for i := uint64(0); i < uint64(n); i++ {
|
|
channel.advanceState(h.t)
|
|
commitTx, _ := h.channel(id).getState(i)
|
|
breachTxID := commitTx.TxHash()
|
|
hints = append(hints, wtdb.NewBreachHintFromHash(&breachTxID))
|
|
}
|
|
|
|
return hints
|
|
}
|
|
|
|
// backupStates instructs the channel identified by id to send backups to the
|
|
// client for states in the range [to, from).
|
|
func (h *testHarness) backupStates(id, from, to uint64, expErr error) {
|
|
h.t.Helper()
|
|
|
|
for i := from; i < to; i++ {
|
|
h.backupState(id, i, expErr)
|
|
}
|
|
}
|
|
|
|
// backupStates instructs the channel identified by id to send a backup for
|
|
// state i.
|
|
func (h *testHarness) backupState(id, i uint64, expErr error) {
|
|
_, retribution := h.channel(id).getState(i)
|
|
|
|
chanID := chanIDFromInt(id)
|
|
err := h.client.BackupState(&chanID, retribution)
|
|
if err != expErr {
|
|
h.t.Fatalf("back error mismatch, want: %v, got: %v",
|
|
expErr, err)
|
|
}
|
|
}
|
|
|
|
// sendPayments instructs the channel identified by id to send amt to the remote
|
|
// party for each state in from-to times and returns the breach hints for states
|
|
// [from, to).
|
|
func (h *testHarness) sendPayments(id, from, to uint64,
|
|
amt lnwire.MilliSatoshi) []wtdb.BreachHint {
|
|
|
|
h.t.Helper()
|
|
|
|
channel := h.channel(id)
|
|
|
|
var hints []wtdb.BreachHint
|
|
for i := from; i < to; i++ {
|
|
h.channel(id).sendPayment(h.t, amt)
|
|
commitTx, _ := channel.getState(i)
|
|
breachTxID := commitTx.TxHash()
|
|
hints = append(hints, wtdb.NewBreachHintFromHash(&breachTxID))
|
|
}
|
|
|
|
return hints
|
|
}
|
|
|
|
// receivePayment instructs the channel identified by id to recv amt from the
|
|
// remote party for each state in from-to times and returns the breach hints for
|
|
// states [from, to).
|
|
func (h *testHarness) recvPayments(id, from, to uint64,
|
|
amt lnwire.MilliSatoshi) []wtdb.BreachHint {
|
|
|
|
h.t.Helper()
|
|
|
|
channel := h.channel(id)
|
|
|
|
var hints []wtdb.BreachHint
|
|
for i := from; i < to; i++ {
|
|
channel.receivePayment(h.t, amt)
|
|
commitTx, _ := channel.getState(i)
|
|
breachTxID := commitTx.TxHash()
|
|
hints = append(hints, wtdb.NewBreachHintFromHash(&breachTxID))
|
|
}
|
|
|
|
return hints
|
|
}
|
|
|
|
// waitServerUpdates blocks until the breach hints provided all appear in the
|
|
// watchtower's database or the timeout expires. This is used to test that the
|
|
// client in fact sends the updates to the server, even if it is offline.
|
|
func (h *testHarness) waitServerUpdates(hints []wtdb.BreachHint,
|
|
timeout time.Duration) {
|
|
|
|
h.t.Helper()
|
|
|
|
// If no breach hints are provided, we will wait out the full timeout to
|
|
// assert that no updates appear.
|
|
wantUpdates := len(hints) > 0
|
|
|
|
hintSet := make(map[wtdb.BreachHint]struct{})
|
|
for _, hint := range hints {
|
|
hintSet[hint] = struct{}{}
|
|
}
|
|
|
|
if len(hints) != len(hintSet) {
|
|
h.t.Fatalf("breach hints are not unique, list-len: %d "+
|
|
"set-len: %d", len(hints), len(hintSet))
|
|
}
|
|
|
|
// Closure to assert the server's matches are consistent with the hint
|
|
// set.
|
|
serverHasHints := func(matches []wtdb.Match) bool {
|
|
if len(hintSet) != len(matches) {
|
|
return false
|
|
}
|
|
|
|
for _, match := range matches {
|
|
if _, ok := hintSet[match.Hint]; ok {
|
|
continue
|
|
}
|
|
|
|
h.t.Fatalf("match %v in db is not in hint set",
|
|
match.Hint)
|
|
}
|
|
|
|
return true
|
|
}
|
|
|
|
failTimeout := time.After(timeout)
|
|
for {
|
|
select {
|
|
case <-time.After(time.Second):
|
|
matches, err := h.serverDB.QueryMatches(hints)
|
|
switch {
|
|
case err != nil:
|
|
h.t.Fatalf("unable to query for hints: %v", err)
|
|
|
|
case wantUpdates && serverHasHints(matches):
|
|
return
|
|
|
|
case wantUpdates:
|
|
h.t.Logf("Received %d/%d\n", len(matches),
|
|
len(hints))
|
|
}
|
|
|
|
case <-failTimeout:
|
|
matches, err := h.serverDB.QueryMatches(hints)
|
|
switch {
|
|
case err != nil:
|
|
h.t.Fatalf("unable to query for hints: %v", err)
|
|
|
|
case serverHasHints(matches):
|
|
return
|
|
|
|
default:
|
|
h.t.Fatalf("breach hints not received, only "+
|
|
"got %d/%d", len(matches), len(hints))
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
const (
|
|
localBalance = lnwire.MilliSatoshi(100000000)
|
|
remoteBalance = lnwire.MilliSatoshi(200000000)
|
|
)
|
|
|
|
type clientTest struct {
|
|
name string
|
|
cfg harnessCfg
|
|
fn func(*testHarness)
|
|
}
|
|
|
|
var clientTests = []clientTest{
|
|
{
|
|
// Asserts that client will return the ErrUnregisteredChannel
|
|
// error when trying to backup states for a channel that has not
|
|
// been registered (and received it's pkscript).
|
|
name: "backup unregistered channel",
|
|
cfg: harnessCfg{
|
|
localBalance: localBalance,
|
|
remoteBalance: remoteBalance,
|
|
policy: wtpolicy.Policy{
|
|
BlobType: blob.TypeDefault,
|
|
MaxUpdates: 20000,
|
|
SweepFeeRate: 1,
|
|
},
|
|
noRegisterChan0: true,
|
|
},
|
|
fn: func(h *testHarness) {
|
|
const (
|
|
numUpdates = 5
|
|
chanID = 0
|
|
)
|
|
|
|
// Advance the channel and backup the retributions. We
|
|
// expect ErrUnregisteredChannel to be returned since
|
|
// the channel was not registered during harness
|
|
// creation.
|
|
h.advanceChannelN(chanID, numUpdates)
|
|
h.backupStates(
|
|
chanID, 0, numUpdates,
|
|
wtclient.ErrUnregisteredChannel,
|
|
)
|
|
},
|
|
},
|
|
{
|
|
// Asserts that the client returns an ErrClientExiting when
|
|
// trying to backup channels after the Stop method has been
|
|
// called.
|
|
name: "backup after stop",
|
|
cfg: harnessCfg{
|
|
localBalance: localBalance,
|
|
remoteBalance: remoteBalance,
|
|
policy: wtpolicy.Policy{
|
|
BlobType: blob.TypeDefault,
|
|
MaxUpdates: 20000,
|
|
SweepFeeRate: 1,
|
|
},
|
|
},
|
|
fn: func(h *testHarness) {
|
|
const (
|
|
numUpdates = 5
|
|
chanID = 0
|
|
)
|
|
|
|
// Stop the client, subsequent backups should fail.
|
|
h.client.Stop()
|
|
|
|
// Advance the channel and try to back up the states. We
|
|
// expect ErrClientExiting to be returned from
|
|
// BackupState.
|
|
h.advanceChannelN(chanID, numUpdates)
|
|
h.backupStates(
|
|
chanID, 0, numUpdates,
|
|
wtclient.ErrClientExiting,
|
|
)
|
|
},
|
|
},
|
|
{
|
|
// Asserts that the client will continue to back up all states
|
|
// that have previously been enqueued before it finishes
|
|
// exiting.
|
|
name: "backup reliable flush",
|
|
cfg: harnessCfg{
|
|
localBalance: localBalance,
|
|
remoteBalance: remoteBalance,
|
|
policy: wtpolicy.Policy{
|
|
BlobType: blob.TypeDefault,
|
|
MaxUpdates: 5,
|
|
SweepFeeRate: 1,
|
|
},
|
|
},
|
|
fn: func(h *testHarness) {
|
|
const (
|
|
numUpdates = 5
|
|
chanID = 0
|
|
)
|
|
|
|
// Generate numUpdates retributions and back them up to
|
|
// the tower.
|
|
hints := h.advanceChannelN(chanID, numUpdates)
|
|
h.backupStates(chanID, 0, numUpdates, nil)
|
|
|
|
// Stop the client in the background, to assert the
|
|
// pipeline is always flushed before it exits.
|
|
go h.client.Stop()
|
|
|
|
// Wait for all of the updates to be populated in the
|
|
// server's database.
|
|
h.waitServerUpdates(hints, time.Second)
|
|
},
|
|
},
|
|
{
|
|
// Assert that the client will not send out backups for states
|
|
// whose justice transactions are ineligible for backup, e.g.
|
|
// creating dust outputs.
|
|
name: "backup dust ineligible",
|
|
cfg: harnessCfg{
|
|
localBalance: localBalance,
|
|
remoteBalance: remoteBalance,
|
|
policy: wtpolicy.Policy{
|
|
BlobType: blob.TypeDefault,
|
|
MaxUpdates: 20000,
|
|
SweepFeeRate: 1000000, // high sweep fee creates dust
|
|
},
|
|
},
|
|
fn: func(h *testHarness) {
|
|
const (
|
|
numUpdates = 5
|
|
chanID = 0
|
|
)
|
|
|
|
// Create the retributions and queue them for backup.
|
|
h.advanceChannelN(chanID, numUpdates)
|
|
h.backupStates(chanID, 0, numUpdates, nil)
|
|
|
|
// Ensure that no updates are received by the server,
|
|
// since they should all be marked as ineligible.
|
|
h.waitServerUpdates(nil, time.Second)
|
|
},
|
|
},
|
|
{
|
|
// Verifies that the client will properly retransmit a committed
|
|
// state update to the watchtower after a restart if the update
|
|
// was not acked while the client was active last.
|
|
name: "committed update restart",
|
|
cfg: harnessCfg{
|
|
localBalance: localBalance,
|
|
remoteBalance: remoteBalance,
|
|
policy: wtpolicy.Policy{
|
|
BlobType: blob.TypeDefault,
|
|
MaxUpdates: 20000,
|
|
SweepFeeRate: 1,
|
|
},
|
|
},
|
|
fn: func(h *testHarness) {
|
|
const (
|
|
numUpdates = 5
|
|
chanID = 0
|
|
)
|
|
|
|
hints := h.advanceChannelN(0, numUpdates)
|
|
|
|
var numSent uint64
|
|
|
|
// Add the first two states to the client's pipeline.
|
|
h.backupStates(chanID, 0, 2, nil)
|
|
numSent = 2
|
|
|
|
// Wait for both to be reflected in the server's
|
|
// database.
|
|
h.waitServerUpdates(hints[:numSent], time.Second)
|
|
|
|
// Now, restart the server and prevent it from acking
|
|
// state updates.
|
|
h.server.Stop()
|
|
h.serverCfg.NoAckUpdates = true
|
|
h.startServer()
|
|
defer h.server.Stop()
|
|
|
|
// Send the next state update to the tower. Since the
|
|
// tower isn't acking state updates, we expect this
|
|
// update to be committed and sent by the session queue,
|
|
// but it will never receive an ack.
|
|
h.backupState(chanID, numSent, nil)
|
|
numSent++
|
|
|
|
// Force quit the client to abort the state updates it
|
|
// has queued. The sleep ensures that the session queues
|
|
// have enough time to commit the state updates before
|
|
// the client is killed.
|
|
time.Sleep(time.Second)
|
|
h.client.ForceQuit()
|
|
|
|
// Restart the server and allow it to ack the updates
|
|
// after the client retransmits the unacked update.
|
|
h.server.Stop()
|
|
h.serverCfg.NoAckUpdates = false
|
|
h.startServer()
|
|
defer h.server.Stop()
|
|
|
|
// Restart the client and allow it to process the
|
|
// committed update.
|
|
h.startClient()
|
|
defer h.client.ForceQuit()
|
|
|
|
// Wait for the committed update to be accepted by the
|
|
// tower.
|
|
h.waitServerUpdates(hints[:numSent], time.Second)
|
|
|
|
// Finally, send the rest of the updates and wait for
|
|
// the tower to receive the remaining states.
|
|
h.backupStates(chanID, numSent, numUpdates, nil)
|
|
|
|
// Wait for all of the updates to be populated in the
|
|
// server's database.
|
|
h.waitServerUpdates(hints, time.Second)
|
|
|
|
},
|
|
},
|
|
{
|
|
// Asserts that the client will continue to retry sending state
|
|
// updates if it doesn't receive an ack from the server. The
|
|
// client is expected to flush everything in its in-memory
|
|
// pipeline once the server begins sending acks again.
|
|
name: "no ack from server",
|
|
cfg: harnessCfg{
|
|
localBalance: localBalance,
|
|
remoteBalance: remoteBalance,
|
|
policy: wtpolicy.Policy{
|
|
BlobType: blob.TypeDefault,
|
|
MaxUpdates: 5,
|
|
SweepFeeRate: 1,
|
|
},
|
|
},
|
|
fn: func(h *testHarness) {
|
|
const (
|
|
numUpdates = 100
|
|
chanID = 0
|
|
)
|
|
|
|
// Generate the retributions that will be backed up.
|
|
hints := h.advanceChannelN(chanID, numUpdates)
|
|
|
|
// Restart the server and prevent it from acking state
|
|
// updates.
|
|
h.server.Stop()
|
|
h.serverCfg.NoAckUpdates = true
|
|
h.startServer()
|
|
defer h.server.Stop()
|
|
|
|
// Now, queue the retributions for backup.
|
|
h.backupStates(chanID, 0, numUpdates, nil)
|
|
|
|
// Stop the client in the background, to assert the
|
|
// pipeline is always flushed before it exits.
|
|
go h.client.Stop()
|
|
|
|
// Give the client time to saturate a large number of
|
|
// session queues for which the server has not acked the
|
|
// state updates that it has received.
|
|
time.Sleep(time.Second)
|
|
|
|
// Restart the server and allow it to ack the updates
|
|
// after the client retransmits the unacked updates.
|
|
h.server.Stop()
|
|
h.serverCfg.NoAckUpdates = false
|
|
h.startServer()
|
|
defer h.server.Stop()
|
|
|
|
// Wait for all of the updates to be populated in the
|
|
// server's database.
|
|
h.waitServerUpdates(hints, 5*time.Second)
|
|
},
|
|
},
|
|
{
|
|
// Asserts that the client is able to send state updates to the
|
|
// tower for a full range of channel values, assuming the sweep
|
|
// fee rates permit it. We expect all of these to be successful
|
|
// since a sweep transactions spending only from one output is
|
|
// less expensive than one that sweeps both.
|
|
name: "send and recv",
|
|
cfg: harnessCfg{
|
|
localBalance: 10000001, // ensure (% amt != 0)
|
|
remoteBalance: 20000001, // ensure (% amt != 0)
|
|
policy: wtpolicy.Policy{
|
|
BlobType: blob.TypeDefault,
|
|
MaxUpdates: 1000,
|
|
SweepFeeRate: 1,
|
|
},
|
|
},
|
|
fn: func(h *testHarness) {
|
|
var (
|
|
capacity = h.cfg.localBalance + h.cfg.remoteBalance
|
|
paymentAmt = lnwire.MilliSatoshi(200000)
|
|
numSends = uint64(h.cfg.localBalance / paymentAmt)
|
|
numRecvs = uint64(capacity / paymentAmt)
|
|
numUpdates = numSends + numRecvs // 200 updates
|
|
chanID = uint64(0)
|
|
)
|
|
|
|
// Send money to the remote party until all funds are
|
|
// depleted.
|
|
sendHints := h.sendPayments(chanID, 0, numSends, paymentAmt)
|
|
|
|
// Now, sequentially receive the entire channel balance
|
|
// from the remote party.
|
|
recvHints := h.recvPayments(chanID, numSends, numUpdates, paymentAmt)
|
|
|
|
// Collect the hints generated by both sending and
|
|
// receiving.
|
|
hints := append(sendHints, recvHints...)
|
|
|
|
// Backup the channel's states the client.
|
|
h.backupStates(chanID, 0, numUpdates, nil)
|
|
|
|
// Wait for all of the updates to be populated in the
|
|
// server's database.
|
|
h.waitServerUpdates(hints, 3*time.Second)
|
|
},
|
|
},
|
|
{
|
|
// Asserts that the client is able to support multiple links.
|
|
name: "multiple link backup",
|
|
cfg: harnessCfg{
|
|
localBalance: localBalance,
|
|
remoteBalance: remoteBalance,
|
|
policy: wtpolicy.Policy{
|
|
BlobType: blob.TypeDefault,
|
|
MaxUpdates: 5,
|
|
SweepFeeRate: 1,
|
|
},
|
|
},
|
|
fn: func(h *testHarness) {
|
|
const (
|
|
numUpdates = 5
|
|
numChans = 10
|
|
)
|
|
|
|
// Initialize and register an additional 9 channels.
|
|
for id := uint64(1); id < 10; id++ {
|
|
h.makeChannel(
|
|
id, h.cfg.localBalance,
|
|
h.cfg.remoteBalance,
|
|
)
|
|
h.registerChannel(id)
|
|
}
|
|
|
|
// Generate the retributions for all 10 channels and
|
|
// collect the breach hints.
|
|
var hints []wtdb.BreachHint
|
|
for id := uint64(0); id < 10; id++ {
|
|
chanHints := h.advanceChannelN(id, numUpdates)
|
|
hints = append(hints, chanHints...)
|
|
}
|
|
|
|
// Provided all retributions to the client from all
|
|
// channels.
|
|
for id := uint64(0); id < 10; id++ {
|
|
h.backupStates(id, 0, numUpdates, nil)
|
|
}
|
|
|
|
// Test reliable flush under multi-client scenario.
|
|
go h.client.Stop()
|
|
|
|
// Wait for all of the updates to be populated in the
|
|
// server's database.
|
|
h.waitServerUpdates(hints, 10*time.Second)
|
|
},
|
|
},
|
|
}
|
|
|
|
// TestClient executes the client test suite, asserting the ability to backup
|
|
// states in a number of failure cases and it's reliability during shutdown.
|
|
func TestClient(t *testing.T) {
|
|
for _, test := range clientTests {
|
|
tc := test
|
|
t.Run(tc.name, func(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
h := newHarness(t, tc.cfg)
|
|
defer h.server.Stop()
|
|
defer h.client.ForceQuit()
|
|
|
|
tc.fn(h)
|
|
})
|
|
}
|
|
}
|