0431701262
With the introduction of the WatchtowerClient RPC subserver, the lnd configuration flag to specify private watchtowers for the client is no longer needed and can lead to confusion upon users. Therefore, we remove the flag completely, and only rely on the watchtower client being active through a new --wtclient.active flag.
1417 lines
37 KiB
Go
1417 lines
37 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 (
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csvDelay uint32 = 144
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towerAddrStr = "18.28.243.2:9911"
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)
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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 *wtmock.TowerDB
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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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noAckCreateSession bool
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}
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func newHarness(t *testing.T, cfg harnessCfg) *testHarness {
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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 := wtmock.NewTowerDB()
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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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NodePrivKey: privKey,
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NewAddress: func() (btcutil.Address, error) {
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return addr, nil
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},
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NoAckCreateSession: cfg.noAckCreateSession,
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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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|
|
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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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|
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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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SecretKeyRing: wtmock.NewSecretKeyRing(),
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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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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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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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if err := client.AddTower(towerAddr); err != nil {
|
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server.Stop()
|
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t.Fatalf("Unable to add tower to wtclient: %v", err)
|
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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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|
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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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}
|
|
|
|
// startServer creates a new server using the harness's current serverCfg and
|
|
// starts it after pointing the mockNet's callback to the new server.
|
|
func (h *testHarness) startServer() {
|
|
h.t.Helper()
|
|
|
|
var err error
|
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h.server, err = wtserver.New(h.serverCfg)
|
|
if err != nil {
|
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h.t.Fatalf("unable to create wtserver: %v", err)
|
|
}
|
|
|
|
h.net.setConnCallback(h.server.InboundPeerConnected)
|
|
|
|
if err := h.server.Start(); err != nil {
|
|
h.t.Fatalf("unable to start wtserver: %v", err)
|
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}
|
|
}
|
|
|
|
// startClient creates a new server using the harness's current clientCf and
|
|
// starts it.
|
|
func (h *testHarness) startClient() {
|
|
h.t.Helper()
|
|
|
|
towerTCPAddr, err := net.ResolveTCPAddr("tcp", towerAddrStr)
|
|
if err != nil {
|
|
h.t.Fatalf("Unable to resolve tower TCP addr: %v", err)
|
|
}
|
|
towerAddr := &lnwire.NetAddress{
|
|
IdentityKey: h.serverCfg.NodePrivKey.PubKey(),
|
|
Address: towerTCPAddr,
|
|
}
|
|
|
|
h.client, err = wtclient.New(h.clientCfg)
|
|
if err != nil {
|
|
h.t.Fatalf("unable to create wtclient: %v", err)
|
|
}
|
|
if err := h.client.Start(); err != nil {
|
|
h.t.Fatalf("unable to start wtclient: %v", err)
|
|
}
|
|
if err := h.client.AddTower(towerAddr); err != nil {
|
|
h.t.Fatalf("unable to add tower to wtclient: %v", err)
|
|
}
|
|
}
|
|
|
|
// chanIDFromInt creates a unique channel id given a unique integral id.
|
|
func chanIDFromInt(id uint64) lnwire.ChannelID {
|
|
var chanID lnwire.ChannelID
|
|
binary.BigEndian.PutUint64(chanID[:8], id)
|
|
return chanID
|
|
}
|
|
|
|
// 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) []blob.BreachHint {
|
|
h.t.Helper()
|
|
|
|
channel := h.channel(id)
|
|
|
|
var hints []blob.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, blob.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) {
|
|
h.t.Helper()
|
|
|
|
_, 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) []blob.BreachHint {
|
|
|
|
h.t.Helper()
|
|
|
|
channel := h.channel(id)
|
|
|
|
var hints []blob.BreachHint
|
|
for i := from; i < to; i++ {
|
|
h.channel(id).sendPayment(h.t, amt)
|
|
commitTx, _ := channel.getState(i)
|
|
breachTxID := commitTx.TxHash()
|
|
hints = append(hints, blob.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) []blob.BreachHint {
|
|
|
|
h.t.Helper()
|
|
|
|
channel := h.channel(id)
|
|
|
|
var hints []blob.BreachHint
|
|
for i := from; i < to; i++ {
|
|
channel.receivePayment(h.t, amt)
|
|
commitTx, _ := channel.getState(i)
|
|
breachTxID := commitTx.TxHash()
|
|
hints = append(hints, blob.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 []blob.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[blob.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))
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// assertUpdatesForPolicy queries the server db for matches using the provided
|
|
// breach hints, then asserts that each match has a session with the expected
|
|
// policy.
|
|
func (h *testHarness) assertUpdatesForPolicy(hints []blob.BreachHint,
|
|
expPolicy wtpolicy.Policy) {
|
|
|
|
// Query for matches on the provided hints.
|
|
matches, err := h.serverDB.QueryMatches(hints)
|
|
if err != nil {
|
|
h.t.Fatalf("unable to query for matches: %v", err)
|
|
}
|
|
|
|
// Assert that the number of matches is exactly the number of provided
|
|
// hints.
|
|
if len(matches) != len(hints) {
|
|
h.t.Fatalf("expected: %d matches, got: %d", len(hints),
|
|
len(matches))
|
|
}
|
|
|
|
// Assert that all of the matches correspond to a session with the
|
|
// expected policy.
|
|
for _, match := range matches {
|
|
matchPolicy := match.SessionInfo.Policy
|
|
if expPolicy != matchPolicy {
|
|
h.t.Fatalf("expected session to have policy: %v, "+
|
|
"got: %v", expPolicy, matchPolicy)
|
|
}
|
|
}
|
|
}
|
|
|
|
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{
|
|
TxPolicy: wtpolicy.TxPolicy{
|
|
BlobType: blob.TypeAltruistCommit,
|
|
SweepFeeRate: wtpolicy.DefaultSweepFeeRate,
|
|
},
|
|
MaxUpdates: 20000,
|
|
},
|
|
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{
|
|
TxPolicy: wtpolicy.TxPolicy{
|
|
BlobType: blob.TypeAltruistCommit,
|
|
SweepFeeRate: wtpolicy.DefaultSweepFeeRate,
|
|
},
|
|
MaxUpdates: 20000,
|
|
},
|
|
},
|
|
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{
|
|
TxPolicy: wtpolicy.TxPolicy{
|
|
BlobType: blob.TypeAltruistCommit,
|
|
SweepFeeRate: wtpolicy.DefaultSweepFeeRate,
|
|
},
|
|
MaxUpdates: 5,
|
|
},
|
|
},
|
|
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{
|
|
TxPolicy: wtpolicy.TxPolicy{
|
|
BlobType: blob.TypeAltruistCommit,
|
|
SweepFeeRate: 1000000, // high sweep fee creates dust
|
|
},
|
|
MaxUpdates: 20000,
|
|
},
|
|
},
|
|
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{
|
|
TxPolicy: wtpolicy.TxPolicy{
|
|
BlobType: blob.TypeAltruistCommit,
|
|
SweepFeeRate: wtpolicy.DefaultSweepFeeRate,
|
|
},
|
|
MaxUpdates: 20000,
|
|
},
|
|
},
|
|
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{
|
|
TxPolicy: wtpolicy.TxPolicy{
|
|
BlobType: blob.TypeAltruistCommit,
|
|
SweepFeeRate: wtpolicy.DefaultSweepFeeRate,
|
|
},
|
|
MaxUpdates: 5,
|
|
},
|
|
},
|
|
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: 100000001, // ensure (% amt != 0)
|
|
remoteBalance: 200000001, // ensure (% amt != 0)
|
|
policy: wtpolicy.Policy{
|
|
TxPolicy: wtpolicy.TxPolicy{
|
|
BlobType: blob.TypeAltruistCommit,
|
|
SweepFeeRate: wtpolicy.DefaultSweepFeeRate,
|
|
},
|
|
MaxUpdates: 1000,
|
|
},
|
|
},
|
|
fn: func(h *testHarness) {
|
|
var (
|
|
capacity = h.cfg.localBalance + h.cfg.remoteBalance
|
|
paymentAmt = lnwire.MilliSatoshi(2000000)
|
|
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{
|
|
TxPolicy: wtpolicy.TxPolicy{
|
|
BlobType: blob.TypeAltruistCommit,
|
|
SweepFeeRate: wtpolicy.DefaultSweepFeeRate,
|
|
},
|
|
MaxUpdates: 5,
|
|
},
|
|
},
|
|
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 []blob.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)
|
|
},
|
|
},
|
|
{
|
|
name: "create session no ack",
|
|
cfg: harnessCfg{
|
|
localBalance: localBalance,
|
|
remoteBalance: remoteBalance,
|
|
policy: wtpolicy.Policy{
|
|
TxPolicy: wtpolicy.TxPolicy{
|
|
BlobType: blob.TypeAltruistCommit,
|
|
SweepFeeRate: wtpolicy.DefaultSweepFeeRate,
|
|
},
|
|
MaxUpdates: 5,
|
|
},
|
|
noAckCreateSession: true,
|
|
},
|
|
fn: func(h *testHarness) {
|
|
const (
|
|
chanID = 0
|
|
numUpdates = 3
|
|
)
|
|
|
|
// Generate the retributions that will be backed up.
|
|
hints := h.advanceChannelN(chanID, numUpdates)
|
|
|
|
// Now, queue the retributions for backup.
|
|
h.backupStates(chanID, 0, numUpdates, nil)
|
|
|
|
// Since the client is unable to create a session, the
|
|
// server should have no updates.
|
|
h.waitServerUpdates(nil, time.Second)
|
|
|
|
// Force quit the client since it has queued backups.
|
|
h.client.ForceQuit()
|
|
|
|
// Restart the server and allow it to ack session
|
|
// creation.
|
|
h.server.Stop()
|
|
h.serverCfg.NoAckCreateSession = false
|
|
h.startServer()
|
|
defer h.server.Stop()
|
|
|
|
// Restart the client with the same policy, which will
|
|
// immediately try to overwrite the old session with an
|
|
// identical one.
|
|
h.startClient()
|
|
defer h.client.ForceQuit()
|
|
|
|
// Now, queue the retributions for backup.
|
|
h.backupStates(chanID, 0, numUpdates, nil)
|
|
|
|
// Wait for all of the updates to be populated in the
|
|
// server's database.
|
|
h.waitServerUpdates(hints, 5*time.Second)
|
|
|
|
// Assert that the server has updates for the clients
|
|
// most recent policy.
|
|
h.assertUpdatesForPolicy(hints, h.clientCfg.Policy)
|
|
},
|
|
},
|
|
{
|
|
name: "create session no ack change policy",
|
|
cfg: harnessCfg{
|
|
localBalance: localBalance,
|
|
remoteBalance: remoteBalance,
|
|
policy: wtpolicy.Policy{
|
|
TxPolicy: wtpolicy.TxPolicy{
|
|
BlobType: blob.TypeAltruistCommit,
|
|
SweepFeeRate: wtpolicy.DefaultSweepFeeRate,
|
|
},
|
|
MaxUpdates: 5,
|
|
},
|
|
noAckCreateSession: true,
|
|
},
|
|
fn: func(h *testHarness) {
|
|
const (
|
|
chanID = 0
|
|
numUpdates = 3
|
|
)
|
|
|
|
// Generate the retributions that will be backed up.
|
|
hints := h.advanceChannelN(chanID, numUpdates)
|
|
|
|
// Now, queue the retributions for backup.
|
|
h.backupStates(chanID, 0, numUpdates, nil)
|
|
|
|
// Since the client is unable to create a session, the
|
|
// server should have no updates.
|
|
h.waitServerUpdates(nil, time.Second)
|
|
|
|
// Force quit the client since it has queued backups.
|
|
h.client.ForceQuit()
|
|
|
|
// Restart the server and allow it to ack session
|
|
// creation.
|
|
h.server.Stop()
|
|
h.serverCfg.NoAckCreateSession = false
|
|
h.startServer()
|
|
defer h.server.Stop()
|
|
|
|
// Restart the client with a new policy, which will
|
|
// immediately try to overwrite the prior session with
|
|
// the old policy.
|
|
h.clientCfg.Policy.SweepFeeRate *= 2
|
|
h.startClient()
|
|
defer h.client.ForceQuit()
|
|
|
|
// Now, queue the retributions for backup.
|
|
h.backupStates(chanID, 0, numUpdates, nil)
|
|
|
|
// Wait for all of the updates to be populated in the
|
|
// server's database.
|
|
h.waitServerUpdates(hints, 5*time.Second)
|
|
|
|
// Assert that the server has updates for the clients
|
|
// most recent policy.
|
|
h.assertUpdatesForPolicy(hints, h.clientCfg.Policy)
|
|
},
|
|
},
|
|
{
|
|
// Asserts that the client will not request a new session if
|
|
// already has an existing session with the same TxPolicy. This
|
|
// permits the client to continue using policies that differ in
|
|
// operational parameters, but don't manifest in different
|
|
// justice transactions.
|
|
name: "create session change policy same txpolicy",
|
|
cfg: harnessCfg{
|
|
localBalance: localBalance,
|
|
remoteBalance: remoteBalance,
|
|
policy: wtpolicy.Policy{
|
|
TxPolicy: wtpolicy.TxPolicy{
|
|
BlobType: blob.TypeAltruistCommit,
|
|
SweepFeeRate: wtpolicy.DefaultSweepFeeRate,
|
|
},
|
|
MaxUpdates: 10,
|
|
},
|
|
},
|
|
fn: func(h *testHarness) {
|
|
const (
|
|
chanID = 0
|
|
numUpdates = 6
|
|
)
|
|
|
|
// Generate the retributions that will be backed up.
|
|
hints := h.advanceChannelN(chanID, numUpdates)
|
|
|
|
// Now, queue the first half of the retributions.
|
|
h.backupStates(chanID, 0, numUpdates/2, nil)
|
|
|
|
// Wait for the server to collect the first half.
|
|
h.waitServerUpdates(hints[:numUpdates/2], time.Second)
|
|
|
|
// Stop the client, which should have no more backups.
|
|
h.client.Stop()
|
|
|
|
// Record the policy that the first half was stored
|
|
// under. We'll expect the second half to also be stored
|
|
// under the original policy, since we are only adjusting
|
|
// the MaxUpdates. The client should detect that the
|
|
// two policies have equivalent TxPolicies and continue
|
|
// using the first.
|
|
expPolicy := h.clientCfg.Policy
|
|
|
|
// Restart the client with a new policy.
|
|
h.clientCfg.Policy.MaxUpdates = 20
|
|
h.startClient()
|
|
defer h.client.ForceQuit()
|
|
|
|
// Now, queue the second half of the retributions.
|
|
h.backupStates(chanID, numUpdates/2, numUpdates, nil)
|
|
|
|
// Wait for all of the updates to be populated in the
|
|
// server's database.
|
|
h.waitServerUpdates(hints, 5*time.Second)
|
|
|
|
// Assert that the server has updates for the client's
|
|
// original policy.
|
|
h.assertUpdatesForPolicy(hints, expPolicy)
|
|
},
|
|
},
|
|
{
|
|
// Asserts that the client will deduplicate backups presented by
|
|
// a channel both in memory and after a restart. The client
|
|
// should only accept backups with a commit height greater than
|
|
// any processed already processed for a given policy.
|
|
name: "dedup backups",
|
|
cfg: harnessCfg{
|
|
localBalance: localBalance,
|
|
remoteBalance: remoteBalance,
|
|
policy: wtpolicy.Policy{
|
|
TxPolicy: wtpolicy.TxPolicy{
|
|
BlobType: blob.TypeAltruistCommit,
|
|
SweepFeeRate: wtpolicy.DefaultSweepFeeRate,
|
|
},
|
|
MaxUpdates: 5,
|
|
},
|
|
},
|
|
fn: func(h *testHarness) {
|
|
const (
|
|
numUpdates = 10
|
|
chanID = 0
|
|
)
|
|
|
|
// Generate the retributions that will be backed up.
|
|
hints := h.advanceChannelN(chanID, numUpdates)
|
|
|
|
// Queue the first half of the retributions twice, the
|
|
// second batch should be entirely deduped by the
|
|
// client's in-memory tracking.
|
|
h.backupStates(chanID, 0, numUpdates/2, nil)
|
|
h.backupStates(chanID, 0, numUpdates/2, nil)
|
|
|
|
// Wait for the first half of the updates to be
|
|
// populated in the server's database.
|
|
h.waitServerUpdates(hints[:len(hints)/2], 5*time.Second)
|
|
|
|
// Restart the client, so we can ensure the deduping is
|
|
// maintained across restarts.
|
|
h.client.Stop()
|
|
h.startClient()
|
|
defer h.client.ForceQuit()
|
|
|
|
// Try to back up the full range of retributions. Only
|
|
// the second half should actually be sent.
|
|
h.backupStates(chanID, 0, numUpdates, nil)
|
|
|
|
// Wait for all of the updates to be populated in the
|
|
// server's database.
|
|
h.waitServerUpdates(hints, 5*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)
|
|
})
|
|
}
|
|
}
|