689 lines
19 KiB
Go
689 lines
19 KiB
Go
package wtdb_test
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import (
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"bytes"
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crand "crypto/rand"
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"io"
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"io/ioutil"
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"net"
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"os"
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"reflect"
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"testing"
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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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)
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// clientDBInit is a closure used to initialize a wtclient.DB instance its
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// cleanup function.
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type clientDBInit func(t *testing.T) (wtclient.DB, func())
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type clientDBHarness struct {
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t *testing.T
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db wtclient.DB
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}
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func newClientDBHarness(t *testing.T, init clientDBInit) (*clientDBHarness, func()) {
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db, cleanup := init(t)
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h := &clientDBHarness{
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t: t,
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db: db,
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}
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return h, cleanup
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}
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func (h *clientDBHarness) insertSession(session *wtdb.ClientSession, expErr error) {
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h.t.Helper()
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err := h.db.CreateClientSession(session)
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if err != expErr {
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h.t.Fatalf("expected create client session error: %v, got: %v",
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expErr, err)
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}
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}
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func (h *clientDBHarness) listSessions() map[wtdb.SessionID]*wtdb.ClientSession {
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h.t.Helper()
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sessions, err := h.db.ListClientSessions()
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if err != nil {
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h.t.Fatalf("unable to list client sessions: %v", err)
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}
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return sessions
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}
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func (h *clientDBHarness) nextKeyIndex(id wtdb.TowerID, expErr error) uint32 {
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h.t.Helper()
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index, err := h.db.NextSessionKeyIndex(id)
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if err != expErr {
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h.t.Fatalf("expected next session key index error: %v, got: %v",
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expErr, err)
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}
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if index == 0 {
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h.t.Fatalf("next key index should never be 0")
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}
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return index
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}
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func (h *clientDBHarness) createTower(lnAddr *lnwire.NetAddress,
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expErr error) *wtdb.Tower {
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h.t.Helper()
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tower, err := h.db.CreateTower(lnAddr)
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if err != expErr {
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h.t.Fatalf("expected create tower error: %v, got: %v", expErr, err)
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}
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if tower.ID == 0 {
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h.t.Fatalf("tower id should never be 0")
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}
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return tower
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}
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func (h *clientDBHarness) loadTower(id wtdb.TowerID, expErr error) *wtdb.Tower {
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h.t.Helper()
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tower, err := h.db.LoadTower(id)
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if err != expErr {
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h.t.Fatalf("expected load tower error: %v, got: %v", expErr, err)
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}
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return tower
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}
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func (h *clientDBHarness) fetchChanSummaries() map[lnwire.ChannelID]wtdb.ClientChanSummary {
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h.t.Helper()
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summaries, err := h.db.FetchChanSummaries()
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if err != nil {
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h.t.Fatalf("unable to fetch chan summaries: %v", err)
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}
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return summaries
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}
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func (h *clientDBHarness) registerChan(chanID lnwire.ChannelID,
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sweepPkScript []byte, expErr error) {
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h.t.Helper()
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err := h.db.RegisterChannel(chanID, sweepPkScript)
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if err != expErr {
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h.t.Fatalf("expected register channel error: %v, got: %v",
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expErr, err)
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}
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}
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func (h *clientDBHarness) commitUpdate(id *wtdb.SessionID,
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update *wtdb.CommittedUpdate, expErr error) uint16 {
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h.t.Helper()
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lastApplied, err := h.db.CommitUpdate(id, update)
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if err != expErr {
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h.t.Fatalf("expected commit update error: %v, got: %v",
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expErr, err)
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}
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return lastApplied
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}
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func (h *clientDBHarness) ackUpdate(id *wtdb.SessionID, seqNum uint16,
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lastApplied uint16, expErr error) {
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h.t.Helper()
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err := h.db.AckUpdate(id, seqNum, lastApplied)
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if err != expErr {
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h.t.Fatalf("expected commit update error: %v, got: %v",
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expErr, err)
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}
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}
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// testCreateClientSession asserts various conditions regarding the creation of
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// a new ClientSession. The test asserts:
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// - client sessions can only be created if a session key index is reserved.
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// - client sessions cannot be created with an incorrect session key index .
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// - inserting duplicate sessions fails.
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func testCreateClientSession(h *clientDBHarness) {
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// Create a test client session to insert.
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session := &wtdb.ClientSession{
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ClientSessionBody: wtdb.ClientSessionBody{
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TowerID: wtdb.TowerID(3),
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Policy: wtpolicy.Policy{
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MaxUpdates: 100,
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},
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RewardPkScript: []byte{0x01, 0x02, 0x03},
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},
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ID: wtdb.SessionID([33]byte{0x01}),
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}
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// First, assert that this session is not already present in the
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// database.
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if _, ok := h.listSessions()[session.ID]; ok {
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h.t.Fatalf("session for id %x should not exist yet", session.ID)
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}
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// Attempting to insert the client session without reserving a session
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// key index should fail.
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h.insertSession(session, wtdb.ErrNoReservedKeyIndex)
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// Now, reserve a session key for this tower.
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keyIndex := h.nextKeyIndex(session.TowerID, nil)
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// The client session hasn't been updated with the reserved key index
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// (since it's still zero). Inserting should fail due to the mismatch.
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h.insertSession(session, wtdb.ErrIncorrectKeyIndex)
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// Reserve another key for the same index. Since no session has been
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// successfully created, it should return the same index to maintain
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// idempotency across restarts.
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keyIndex2 := h.nextKeyIndex(session.TowerID, nil)
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if keyIndex != keyIndex2 {
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h.t.Fatalf("next key index should be idempotent: want: %v, "+
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"got %v", keyIndex, keyIndex2)
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}
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// Now, set the client session's key index so that it is proper and
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// insert it. This should succeed.
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session.KeyIndex = keyIndex
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h.insertSession(session, nil)
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// Verify that the session now exists in the database.
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if _, ok := h.listSessions()[session.ID]; !ok {
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h.t.Fatalf("session for id %x should exist now", session.ID)
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}
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// Attempt to insert the session again, which should fail due to the
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// session already existing.
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h.insertSession(session, wtdb.ErrClientSessionAlreadyExists)
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// Finally, assert that reserving another key index succeeds with a
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// different key index, now that the first one has been finalized.
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keyIndex3 := h.nextKeyIndex(session.TowerID, nil)
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if keyIndex == keyIndex3 {
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h.t.Fatalf("key index still reserved after creating session")
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}
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}
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// testCreateTower asserts the behavior of creating new Tower objects within the
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// database, and that the latest address is always prepended to the list of
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// known addresses for the tower.
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func testCreateTower(h *clientDBHarness) {
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// Test that loading a tower with an arbitrary tower id fails.
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h.loadTower(20, wtdb.ErrTowerNotFound)
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pk, err := randPubKey()
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if err != nil {
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h.t.Fatalf("unable to generate pubkey: %v", err)
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}
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addr1 := &net.TCPAddr{IP: []byte{0x01, 0x00, 0x00, 0x00}, Port: 9911}
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lnAddr := &lnwire.NetAddress{
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IdentityKey: pk,
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Address: addr1,
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}
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// Insert a random tower into the database.
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tower := h.createTower(lnAddr, nil)
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// Load the tower from the database and assert that it matches the tower
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// we created.
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tower2 := h.loadTower(tower.ID, nil)
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if !reflect.DeepEqual(tower, tower2) {
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h.t.Fatalf("loaded tower mismatch, want: %v, got: %v",
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tower, tower2)
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}
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// Insert the address again into the database. Since the address is the
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// same, this should result in an unmodified tower record.
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towerDupAddr := h.createTower(lnAddr, nil)
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if len(towerDupAddr.Addresses) != 1 {
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h.t.Fatalf("duplicate address should be deduped")
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}
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if !reflect.DeepEqual(tower, towerDupAddr) {
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h.t.Fatalf("mismatch towers, want: %v, got: %v",
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tower, towerDupAddr)
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}
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// Generate a new address for this tower.
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addr2 := &net.TCPAddr{IP: []byte{0x02, 0x00, 0x00, 0x00}, Port: 9911}
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lnAddr2 := &lnwire.NetAddress{
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IdentityKey: pk,
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Address: addr2,
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}
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// Insert the updated address, which should produce a tower with a new
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// address.
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towerNewAddr := h.createTower(lnAddr2, nil)
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// Load the tower from the database, and assert that it matches the
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// tower returned from creation.
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towerNewAddr2 := h.loadTower(tower.ID, nil)
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if !reflect.DeepEqual(towerNewAddr, towerNewAddr2) {
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h.t.Fatalf("loaded tower mismatch, want: %v, got: %v",
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towerNewAddr, towerNewAddr2)
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}
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// Assert that there are now two addresses on the tower object.
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if len(towerNewAddr.Addresses) != 2 {
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h.t.Fatalf("new address should be added")
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}
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// Finally, assert that the new address was prepended since it is deemed
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// fresher.
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if !reflect.DeepEqual(tower.Addresses, towerNewAddr.Addresses[1:]) {
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h.t.Fatalf("new address should be prepended")
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}
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}
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// testChanSummaries tests the process of a registering a channel and its
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// associated sweep pkscript.
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func testChanSummaries(h *clientDBHarness) {
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// First, assert that this channel is not already registered.
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var chanID lnwire.ChannelID
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if _, ok := h.fetchChanSummaries()[chanID]; ok {
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h.t.Fatalf("pkscript for channel %x should not exist yet",
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chanID)
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}
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// Generate a random sweep pkscript and register it for this channel.
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expPkScript := make([]byte, 22)
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if _, err := io.ReadFull(crand.Reader, expPkScript); err != nil {
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h.t.Fatalf("unable to generate pkscript: %v", err)
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}
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h.registerChan(chanID, expPkScript, nil)
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// Assert that the channel exists and that its sweep pkscript matches
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// the one we registered.
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summary, ok := h.fetchChanSummaries()[chanID]
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if !ok {
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h.t.Fatalf("pkscript for channel %x should not exist yet",
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chanID)
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} else if bytes.Compare(expPkScript, summary.SweepPkScript) != 0 {
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h.t.Fatalf("pkscript mismatch, want: %x, got: %x",
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expPkScript, summary.SweepPkScript)
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}
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// Finally, assert that re-registering the same channel produces a
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// failure.
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h.registerChan(chanID, expPkScript, wtdb.ErrChannelAlreadyRegistered)
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}
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// testCommitUpdate tests the behavior of CommitUpdate, ensuring that they can
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func testCommitUpdate(h *clientDBHarness) {
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session := &wtdb.ClientSession{
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ClientSessionBody: wtdb.ClientSessionBody{
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TowerID: wtdb.TowerID(3),
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Policy: wtpolicy.Policy{
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MaxUpdates: 100,
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},
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RewardPkScript: []byte{0x01, 0x02, 0x03},
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},
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ID: wtdb.SessionID([33]byte{0x02}),
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}
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// Generate a random update and try to commit before inserting the
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// session, which should fail.
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update1 := randCommittedUpdate(h.t, 1)
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h.commitUpdate(&session.ID, update1, wtdb.ErrClientSessionNotFound)
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// Reserve a session key index and insert the session.
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session.KeyIndex = h.nextKeyIndex(session.TowerID, nil)
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h.insertSession(session, nil)
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// Now, try to commit the update that failed initially which should
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// succeed. The lastApplied value should be 0 since we have not received
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// an ack from the tower.
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lastApplied := h.commitUpdate(&session.ID, update1, nil)
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if lastApplied != 0 {
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h.t.Fatalf("last applied mismatch, want: 0, got: %v",
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lastApplied)
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}
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// Assert that the committed update appears in the client session's
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// CommittedUpdates map when loaded from disk and that there are no
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// AckedUpdates.
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dbSession := h.listSessions()[session.ID]
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checkCommittedUpdates(h.t, dbSession, []wtdb.CommittedUpdate{
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*update1,
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})
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checkAckedUpdates(h.t, dbSession, nil)
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// Try to commit the same update, which should succeed due to
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// idempotency (which is preserved when the breach hint is identical to
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// the on-disk update's hint). The lastApplied value should remain
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// unchanged.
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lastApplied2 := h.commitUpdate(&session.ID, update1, nil)
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if lastApplied2 != lastApplied {
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h.t.Fatalf("last applied should not have changed, got %v",
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lastApplied2)
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}
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// Assert that the loaded ClientSession is the same as before.
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dbSession = h.listSessions()[session.ID]
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checkCommittedUpdates(h.t, dbSession, []wtdb.CommittedUpdate{
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*update1,
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})
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checkAckedUpdates(h.t, dbSession, nil)
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// Generate another random update and try to commit it at the identical
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// sequence number. Since the breach hint has changed, this should fail.
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update2 := randCommittedUpdate(h.t, 1)
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h.commitUpdate(&session.ID, update2, wtdb.ErrUpdateAlreadyCommitted)
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// Next, insert the new update at the next unallocated sequence number
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// which should succeed.
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update2.SeqNum = 2
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lastApplied3 := h.commitUpdate(&session.ID, update2, nil)
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if lastApplied3 != lastApplied {
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h.t.Fatalf("last applied should not have changed, got %v",
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lastApplied3)
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}
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// Check that both updates now appear as committed on the ClientSession
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// loaded from disk.
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dbSession = h.listSessions()[session.ID]
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checkCommittedUpdates(h.t, dbSession, []wtdb.CommittedUpdate{
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*update1,
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*update2,
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})
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checkAckedUpdates(h.t, dbSession, nil)
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// Finally, create one more random update and try to commit it at index
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// 4, which should be rejected since 3 is the next slot the database
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// expects.
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update4 := randCommittedUpdate(h.t, 4)
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h.commitUpdate(&session.ID, update4, wtdb.ErrCommitUnorderedUpdate)
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// Assert that the ClientSession loaded from disk remains unchanged.
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dbSession = h.listSessions()[session.ID]
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checkCommittedUpdates(h.t, dbSession, []wtdb.CommittedUpdate{
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*update1,
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*update2,
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})
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checkAckedUpdates(h.t, dbSession, nil)
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}
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// testAckUpdate asserts the behavior of AckUpdate.
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func testAckUpdate(h *clientDBHarness) {
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// Create a new session that the updates in this will be tied to.
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session := &wtdb.ClientSession{
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ClientSessionBody: wtdb.ClientSessionBody{
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TowerID: wtdb.TowerID(3),
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Policy: wtpolicy.Policy{
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MaxUpdates: 100,
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},
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RewardPkScript: []byte{0x01, 0x02, 0x03},
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},
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ID: wtdb.SessionID([33]byte{0x03}),
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}
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// Try to ack an update before inserting the client session, which
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// should fail.
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h.ackUpdate(&session.ID, 1, 0, wtdb.ErrClientSessionNotFound)
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// Reserve a session key and insert the client session.
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session.KeyIndex = h.nextKeyIndex(session.TowerID, nil)
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h.insertSession(session, nil)
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// Now, try to ack update 1. This should fail since update 1 was never
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// committed.
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h.ackUpdate(&session.ID, 1, 0, wtdb.ErrCommittedUpdateNotFound)
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// Commit to a random update at seqnum 1.
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update1 := randCommittedUpdate(h.t, 1)
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lastApplied := h.commitUpdate(&session.ID, update1, nil)
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if lastApplied != 0 {
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h.t.Fatalf("last applied mismatch, want: 0, got: %v",
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lastApplied)
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}
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// Acking seqnum 1 should succeed.
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h.ackUpdate(&session.ID, 1, 1, nil)
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// Acking seqnum 1 again should fail.
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h.ackUpdate(&session.ID, 1, 1, wtdb.ErrCommittedUpdateNotFound)
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// Acking a valid seqnum with a reverted last applied value should fail.
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h.ackUpdate(&session.ID, 1, 0, wtdb.ErrLastAppliedReversion)
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// Acking with a last applied greater than any allocated seqnum should
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// fail.
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h.ackUpdate(&session.ID, 4, 3, wtdb.ErrUnallocatedLastApplied)
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// Assert that the ClientSession loaded from disk has one update in it's
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// AckedUpdates map, and that the committed update has been removed.
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dbSession := h.listSessions()[session.ID]
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checkCommittedUpdates(h.t, dbSession, nil)
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checkAckedUpdates(h.t, dbSession, map[uint16]wtdb.BackupID{
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1: update1.BackupID,
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})
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// Commit to another random update, and assert that the last applied
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// value is 1, since this was what was provided in the last successful
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// ack.
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update2 := randCommittedUpdate(h.t, 2)
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lastApplied = h.commitUpdate(&session.ID, update2, nil)
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if lastApplied != 1 {
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h.t.Fatalf("last applied mismatch, want: 1, got: %v",
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lastApplied)
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}
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// Ack seqnum 2.
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h.ackUpdate(&session.ID, 2, 2, nil)
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// Assert that both updates exist as AckedUpdates when loaded from disk.
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dbSession = h.listSessions()[session.ID]
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checkCommittedUpdates(h.t, dbSession, nil)
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|
checkAckedUpdates(h.t, dbSession, map[uint16]wtdb.BackupID{
|
|
1: update1.BackupID,
|
|
2: update2.BackupID,
|
|
})
|
|
|
|
// Acking again with a lower last applied should fail.
|
|
h.ackUpdate(&session.ID, 2, 1, wtdb.ErrLastAppliedReversion)
|
|
|
|
// Acking an unallocated seqnum should fail.
|
|
h.ackUpdate(&session.ID, 4, 2, wtdb.ErrCommittedUpdateNotFound)
|
|
|
|
// Acking with a last applied greater than any allocated seqnum should
|
|
// fail.
|
|
h.ackUpdate(&session.ID, 4, 3, wtdb.ErrUnallocatedLastApplied)
|
|
}
|
|
|
|
// checkCommittedUpdates asserts that the CommittedUpdates on session match the
|
|
// expUpdates provided.
|
|
func checkCommittedUpdates(t *testing.T, session *wtdb.ClientSession,
|
|
expUpdates []wtdb.CommittedUpdate) {
|
|
|
|
t.Helper()
|
|
|
|
// We promote nil expUpdates to an initialized slice since the database
|
|
// should never return a nil slice. This promotion is done purely out of
|
|
// convenience for the testing framework.
|
|
if expUpdates == nil {
|
|
expUpdates = make([]wtdb.CommittedUpdate, 0)
|
|
}
|
|
|
|
if !reflect.DeepEqual(session.CommittedUpdates, expUpdates) {
|
|
t.Fatalf("committed updates mismatch, want: %v, got: %v",
|
|
expUpdates, session.CommittedUpdates)
|
|
}
|
|
}
|
|
|
|
// checkAckedUpdates asserts that the AckedUpdates on a sessio match the
|
|
// expUpdates provided.
|
|
func checkAckedUpdates(t *testing.T, session *wtdb.ClientSession,
|
|
expUpdates map[uint16]wtdb.BackupID) {
|
|
|
|
// We promote nil expUpdates to an initialized map since the database
|
|
// should never return a nil map. This promotion is done purely out of
|
|
// convenience for the testing framework.
|
|
if expUpdates == nil {
|
|
expUpdates = make(map[uint16]wtdb.BackupID)
|
|
}
|
|
|
|
if !reflect.DeepEqual(session.AckedUpdates, expUpdates) {
|
|
t.Fatalf("acked updates mismatch, want: %v, got: %v",
|
|
expUpdates, session.AckedUpdates)
|
|
}
|
|
}
|
|
|
|
// TestClientDB asserts the behavior of a fresh client db, a reopened client db,
|
|
// and the mock implementation. This ensures that all databases function
|
|
// identically, especially in the negative paths.
|
|
func TestClientDB(t *testing.T) {
|
|
dbs := []struct {
|
|
name string
|
|
init clientDBInit
|
|
}{
|
|
{
|
|
name: "fresh clientdb",
|
|
init: func(t *testing.T) (wtclient.DB, func()) {
|
|
path, err := ioutil.TempDir("", "clientdb")
|
|
if err != nil {
|
|
t.Fatalf("unable to make temp dir: %v",
|
|
err)
|
|
}
|
|
|
|
db, err := wtdb.OpenClientDB(path)
|
|
if err != nil {
|
|
os.RemoveAll(path)
|
|
t.Fatalf("unable to open db: %v", err)
|
|
}
|
|
|
|
cleanup := func() {
|
|
db.Close()
|
|
os.RemoveAll(path)
|
|
}
|
|
|
|
return db, cleanup
|
|
},
|
|
},
|
|
{
|
|
name: "reopened clientdb",
|
|
init: func(t *testing.T) (wtclient.DB, func()) {
|
|
path, err := ioutil.TempDir("", "clientdb")
|
|
if err != nil {
|
|
t.Fatalf("unable to make temp dir: %v",
|
|
err)
|
|
}
|
|
|
|
db, err := wtdb.OpenClientDB(path)
|
|
if err != nil {
|
|
os.RemoveAll(path)
|
|
t.Fatalf("unable to open db: %v", err)
|
|
}
|
|
db.Close()
|
|
|
|
db, err = wtdb.OpenClientDB(path)
|
|
if err != nil {
|
|
os.RemoveAll(path)
|
|
t.Fatalf("unable to reopen db: %v", err)
|
|
}
|
|
|
|
cleanup := func() {
|
|
db.Close()
|
|
os.RemoveAll(path)
|
|
}
|
|
|
|
return db, cleanup
|
|
},
|
|
},
|
|
{
|
|
name: "mock",
|
|
init: func(t *testing.T) (wtclient.DB, func()) {
|
|
return wtmock.NewClientDB(), func() {}
|
|
},
|
|
},
|
|
}
|
|
|
|
tests := []struct {
|
|
name string
|
|
run func(*clientDBHarness)
|
|
}{
|
|
{
|
|
name: "create client session",
|
|
run: testCreateClientSession,
|
|
},
|
|
{
|
|
name: "create tower",
|
|
run: testCreateTower,
|
|
},
|
|
{
|
|
name: "chan summaries",
|
|
run: testChanSummaries,
|
|
},
|
|
{
|
|
name: "commit update",
|
|
run: testCommitUpdate,
|
|
},
|
|
{
|
|
name: "ack update",
|
|
run: testAckUpdate,
|
|
},
|
|
}
|
|
|
|
for _, database := range dbs {
|
|
db := database
|
|
t.Run(db.name, func(t *testing.T) {
|
|
t.Parallel()
|
|
|
|
for _, test := range tests {
|
|
t.Run(test.name, func(t *testing.T) {
|
|
h, cleanup := newClientDBHarness(
|
|
t, db.init,
|
|
)
|
|
defer cleanup()
|
|
|
|
test.run(h)
|
|
})
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
// randCommittedUpdate generates a random committed update.
|
|
func randCommittedUpdate(t *testing.T, seqNum uint16) *wtdb.CommittedUpdate {
|
|
var chanID lnwire.ChannelID
|
|
if _, err := io.ReadFull(crand.Reader, chanID[:]); err != nil {
|
|
t.Fatalf("unable to generate chan id: %v", err)
|
|
}
|
|
|
|
var hint blob.BreachHint
|
|
if _, err := io.ReadFull(crand.Reader, hint[:]); err != nil {
|
|
t.Fatalf("unable to generate breach hint: %v", err)
|
|
}
|
|
|
|
encBlob := make([]byte, blob.Size(blob.FlagCommitOutputs.Type()))
|
|
if _, err := io.ReadFull(crand.Reader, encBlob); err != nil {
|
|
t.Fatalf("unable to generate encrypted blob: %v", err)
|
|
}
|
|
|
|
return &wtdb.CommittedUpdate{
|
|
SeqNum: seqNum,
|
|
CommittedUpdateBody: wtdb.CommittedUpdateBody{
|
|
BackupID: wtdb.BackupID{
|
|
ChanID: chanID,
|
|
CommitHeight: 666,
|
|
},
|
|
Hint: hint,
|
|
EncryptedBlob: encBlob,
|
|
},
|
|
}
|
|
}
|