lntest+itest: add new method CurrentHeight

itest/lnd_channel_backup_test.go

@@ -624,8 +624,8 @@ func runChanRestoreScenarioCommitTypes(ht *lntest.HarnessTest,
 
 	var fundingShim *lnrpc.FundingShim
 	if ct == lnrpc.CommitmentType_SCRIPT_ENFORCED_LEASE {
-		_, minerHeight := ht.GetBestBlock()
-		thawHeight := uint32(minerHeight + thawHeightDelta)
+		minerHeight := ht.CurrentHeight()
+		thawHeight := minerHeight + thawHeightDelta
 
 		fundingShim, _ = deriveFundingShim(
 			ht, dave, carol, crs.params.Amt, thawHeight, true, ct,

itest/lnd_channel_force_close_test.go

@@ -160,7 +160,7 @@ func channelForceClosureTest(ht *lntest.HarnessTest,
 
 	// Fetch starting height of this test so we can compute the block
 	// heights we expect certain events to take place.
-	_, curHeight := ht.GetBestBlock()
+	curHeight := int32(ht.CurrentHeight())
 
 	// Using the current height of the chain, derive the relevant heights
 	// for incubating two-stage htlcs.
@@ -431,7 +431,7 @@ func channelForceClosureTest(ht *lntest.HarnessTest,
 	ht.MineBlocksAndAssertNumTxes(1, 1)
 
 	// Update current height
-	_, curHeight = ht.GetBestBlock()
+	curHeight = int32(ht.CurrentHeight())
 
 	// checkForceClosedChannelNumHtlcs verifies that a force closed channel
 	// has the proper number of htlcs.
@@ -485,7 +485,7 @@ func channelForceClosureTest(ht *lntest.HarnessTest,
 	// number of blocks we have generated since adding it to the nursery,
 	// and take an additional block off so that we end up one block shy of
 	// the expiry height, and add the block padding.
-	_, currentHeight := ht.GetBestBlock()
+	currentHeight := int32(ht.CurrentHeight())
 	cltvHeightDelta := int(htlcExpiryHeight - uint32(currentHeight) - 1)
 
 	// Advance the blockchain until just before the CLTV expires, nothing
@@ -662,7 +662,7 @@ func channelForceClosureTest(ht *lntest.HarnessTest,
 
 	// Advance the chain until just before the 2nd-layer CSV delays expire.
 	// For anchor channels this is one block earlier.
-	_, currentHeight = ht.GetBestBlock()
+	currentHeight = int32(ht.CurrentHeight())
 	ht.Logf("current height: %v, htlcCsvMaturityHeight=%v", currentHeight,
 		htlcCsvMaturityHeight)
 	numBlocks := int(htlcCsvMaturityHeight - uint32(currentHeight) - 2)

itest/lnd_channel_graph_test.go

@@ -316,7 +316,7 @@ func testGraphTopologyNtfns(ht *lntest.HarnessTest, pinned bool) {
 	ht.AssertNumNodeAnns(alice, alice.PubKeyStr, 1)
 	ht.AssertNumNodeAnns(alice, bob.PubKeyStr, 1)
 
-	_, blockHeight := ht.GetBestBlock()
+	blockHeight := ht.CurrentHeight()
 
 	// Now we'll test that updates are properly sent after channels are
 	// closed within the network.
@@ -326,7 +326,7 @@ func testGraphTopologyNtfns(ht *lntest.HarnessTest, pinned bool) {
 	// notification indicating so.
 	closedChan := ht.AssertTopologyChannelClosed(alice, chanPoint)
 
-	require.Equal(ht, uint32(blockHeight+1), closedChan.ClosedHeight,
+	require.Equal(ht, blockHeight+1, closedChan.ClosedHeight,
 		"close heights of channel mismatch")
 
 	fundingTxid := ht.OutPointFromChannelPoint(chanPoint)

itest/lnd_funding_test.go

@@ -862,7 +862,7 @@ func testChannelFundingPersistence(ht *lntest.HarnessTest) {
 	ht.AssertTxInBlock(block, fundingTxID)
 
 	// Get the height that our transaction confirmed at.
-	_, height := ht.GetBestBlock()
+	height := int32(ht.CurrentHeight())
 
 	// Restart both nodes to test that the appropriate state has been
 	// persisted and that both nodes recover gracefully.

itest/lnd_hold_invoice_force_test.go

@@ -59,14 +59,14 @@ func testHoldInvoiceForceClose(ht *lntest.HarnessTest) {
 	require.Len(ht, channel.PendingHtlcs, 1)
 	activeHtlc := channel.PendingHtlcs[0]
 
-	_, currentHeight := ht.GetBestBlock()
+	currentHeight := ht.CurrentHeight()
 
 	// Now we will mine blocks until the htlc expires, and wait for each
 	// node to sync to our latest height. Sanity check that we won't
 	// underflow.
-	require.Greater(ht, activeHtlc.ExpirationHeight, uint32(currentHeight),
+	require.Greater(ht, activeHtlc.ExpirationHeight, currentHeight,
 		"expected expiry after current height")
-	blocksTillExpiry := activeHtlc.ExpirationHeight - uint32(currentHeight)
+	blocksTillExpiry := activeHtlc.ExpirationHeight - currentHeight
 
 	// Alice will go to chain with some delta, sanity check that we won't
 	// underflow and subtract this from our mined blocks.

itest/lnd_multi-hop_test.go

@@ -2092,7 +2092,7 @@ func runMultiHopHtlcAggregation(ht *lntest.HarnessTest,
 		numBlocks := uint32(forceCloseChan.BlocksTilMaturity)
 
 		// Add debug log.
-		_, height := ht.GetBestBlock()
+		height := ht.CurrentHeight()
 		bob.AddToLogf("itest: now mine %d blocks at height %d",
 			numBlocks, height)
 		ht.MineEmptyBlocks(int(numBlocks) - 1)
@@ -2232,8 +2232,8 @@ func createThreeHopNetwork(ht *lntest.HarnessTest,
 	var aliceFundingShim *lnrpc.FundingShim
 	var thawHeight uint32
 	if c == lnrpc.CommitmentType_SCRIPT_ENFORCED_LEASE {
-		_, minerHeight := ht.GetBestBlock()
-		thawHeight = uint32(minerHeight + thawHeightDelta)
+		minerHeight := ht.CurrentHeight()
+		thawHeight = minerHeight + thawHeightDelta
 		aliceFundingShim, _ = deriveFundingShim(
 			ht, alice, bob, chanAmt, thawHeight, true, c,
 		)
@@ -2449,10 +2449,10 @@ func runExtraPreimageFromRemoteCommit(ht *lntest.HarnessTest,
 
 	// Get the current height to compute number of blocks to mine to
 	// trigger the htlc timeout resolver from Bob.
-	_, height := ht.GetBestBlock()
+	height := ht.CurrentHeight()
 
 	// We'll now mine enough blocks to trigger Bob's timeout resolver.
-	numBlocks = htlc.ExpirationHeight - uint32(height) -
+	numBlocks = htlc.ExpirationHeight - height -
 		lncfg.DefaultOutgoingBroadcastDelta
 
 	// We should now have Carol's htlc success tx in the mempool.
@@ -2680,12 +2680,12 @@ func runExtraPreimageFromLocalCommit(ht *lntest.HarnessTest,
 
 	// Get the current height to compute number of blocks to mine to
 	// trigger the timeout resolver from Bob.
-	_, height := ht.GetBestBlock()
+	height := ht.CurrentHeight()
 
 	// We'll now mine enough blocks to trigger Bob's htlc timeout resolver
 	// to act. Once his timeout resolver starts, it will extract the
 	// preimage from Carol's direct spend tx found in the mempool.
-	numBlocks = htlc.ExpirationHeight - uint32(height) -
+	numBlocks = htlc.ExpirationHeight - height -
 		lncfg.DefaultOutgoingBroadcastDelta
 
 	// Decrease the fee rate used by the sweeper so Bob's timeout tx will

itest/lnd_onchain_test.go

@@ -486,7 +486,7 @@ func testAnchorThirdPartySpend(ht *lntest.HarnessTest) {
 
 	// We now update the anchor sweep's deadline to be different than the
 	// commit sweep so they can won't grouped together.
-	_, currentHeight := ht.GetBestBlock()
+	currentHeight := int32(ht.CurrentHeight())
 	deadline := int32(commit.DeadlineHeight) - currentHeight
 	require.Positive(ht, deadline)
 	ht.Logf("Found commit deadline %d, anchor deadline %d",
@@ -836,7 +836,7 @@ func testListSweeps(ht *lntest.HarnessTest) {
 	ht.MineEmptyBlocks(1)
 
 	// Get the current block height.
-	_, blockHeight := ht.GetBestBlock()
+	blockHeight := int32(ht.CurrentHeight())
 
 	// Close the second channel and also sweep the funds.
 	ht.ForceCloseChannel(alice, chanPoints[1])

itest/lnd_routing_test.go

@@ -117,7 +117,7 @@ func testSingleHopSendToRouteCase(ht *lntest.HarnessTest,
 	// Assert Carol and Dave are synced to the chain before proceeding, to
 	// ensure the queried route will have a valid final CLTV once the HTLC
 	// reaches Dave.
-	_, minerHeight := ht.GetBestBlock()
+	minerHeight := int32(ht.CurrentHeight())
 	ht.WaitForNodeBlockHeight(carol, minerHeight)
 	ht.WaitForNodeBlockHeight(dave, minerHeight)
 

itest/lnd_sweep_test.go

@@ -172,7 +172,7 @@ func testSweepCPFPAnchorOutgoingTimeout(ht *lntest.HarnessTest) {
 
 	// Remember the force close height so we can calculate the deadline
 	// height.
-	_, forceCloseHeight := ht.GetBestBlock()
+	forceCloseHeight := ht.CurrentHeight()
 
 	// Bob should have two pending sweeps,
 	// - anchor sweeping from his local commitment.
@@ -188,7 +188,7 @@ func testSweepCPFPAnchorOutgoingTimeout(ht *lntest.HarnessTest) {
 	sweeps := ht.AssertNumPendingSweeps(bob, 2)
 
 	// The two anchor sweeping should have the same deadline height.
-	deadlineHeight := uint32(forceCloseHeight) + deadlineDeltaAnchor
+	deadlineHeight := forceCloseHeight + deadlineDeltaAnchor
 	require.Equal(ht, deadlineHeight, sweeps[0].DeadlineHeight)
 	require.Equal(ht, deadlineHeight, sweeps[1].DeadlineHeight)
 
@@ -304,7 +304,7 @@ func testSweepCPFPAnchorOutgoingTimeout(ht *lntest.HarnessTest) {
 	//
 	// Once out of the above loop, we expect to be 2 blocks before the CPFP
 	// deadline.
-	_, currentHeight := ht.GetBestBlock()
+	currentHeight := ht.CurrentHeight()
 	require.Equal(ht, int(anchorDeadline-2), int(currentHeight))
 
 	// Mine one more block, we'd use up all the CPFP budget.
@@ -512,8 +512,8 @@ func testSweepCPFPAnchorIncomingTimeout(ht *lntest.HarnessTest) {
 	forceCloseHeight := htlc.ExpirationHeight - goToChainDelta
 
 	// Mine till the goToChainHeight is reached.
-	_, currentHeight := ht.GetBestBlock()
-	numBlocks := forceCloseHeight - uint32(currentHeight)
+	currentHeight := ht.CurrentHeight()
+	numBlocks := forceCloseHeight - currentHeight
 	ht.MineEmptyBlocks(int(numBlocks))
 
 	// Assert Bob's force closing tx has been broadcast.
@@ -641,7 +641,7 @@ func testSweepCPFPAnchorIncomingTimeout(ht *lntest.HarnessTest) {
 	//
 	// Once out of the above loop, we expect to be 2 blocks before the CPFP
 	// deadline.
-	_, currentHeight = ht.GetBestBlock()
+	currentHeight = ht.CurrentHeight()
 	require.Equal(ht, int(anchorDeadline-2), int(currentHeight))
 
 	// Mine one more block, we'd use up all the CPFP budget.
@@ -1380,7 +1380,7 @@ func testSweepCommitOutputAndAnchor(ht *lntest.HarnessTest) {
 	//
 	// TODO(yy): assert they are equal once blocks are synced via
 	// `blockbeat`.
-	_, currentHeight := ht.GetBestBlock()
+	currentHeight := int32(ht.CurrentHeight())
 	actualDeadline := int32(pendingSweepBob.DeadlineHeight) - currentHeight
 	if actualDeadline != int32(deadlineB) {
 		ht.Logf("!!! Found unsynced block between sweeper and "+
@@ -1438,7 +1438,7 @@ func testSweepCommitOutputAndAnchor(ht *lntest.HarnessTest) {
 	//
 	// TODO(yy): assert they are equal once blocks are synced via
 	// `blockbeat`.
-	_, currentHeight = ht.GetBestBlock()
+	currentHeight = int32(ht.CurrentHeight())
 	actualDeadline = int32(aliceCommit.DeadlineHeight) - currentHeight
 	if actualDeadline != int32(deadlineA) {
 		ht.Logf("!!! Found unsynced block between Alice's sweeper and "+
@@ -1972,7 +1972,7 @@ func runBumpFee(ht *lntest.HarnessTest, alice *node.HarnessNode) {
 
 	// Since the request doesn't specify a deadline, we expect the default
 	// deadline to be used.
-	_, currentHeight := ht.GetBestBlock()
+	currentHeight := int32(ht.CurrentHeight())
 	deadline := uint32(currentHeight + sweep.DefaultDeadlineDelta)
 
 	// Assert the pending sweep is created with the expected values:

itest/lnd_taproot_test.go

@@ -1535,13 +1535,13 @@ func publishTxAndConfirmSweep(ht *lntest.HarnessTest, node *node.HarnessNode,
 	// Before we publish the tx that spends the p2tr transaction, we want to
 	// register a spend listener that we expect to fire after mining the
 	// block.
-	_, currentHeight := ht.GetBestBlock()
+	currentHeight := ht.CurrentHeight()
 
 	// For a Taproot output we cannot leave the outpoint empty. Let's make
 	// sure the API returns the correct error here.
 	req := &chainrpc.SpendRequest{
 		Script:     spendRequest.Script,
-		HeightHint: uint32(currentHeight),
+		HeightHint: currentHeight,
 	}
 	spendClient := node.RPC.RegisterSpendNtfn(req)
 
@@ -1556,7 +1556,7 @@ func publishTxAndConfirmSweep(ht *lntest.HarnessTest, node *node.HarnessNode,
 	req = &chainrpc.SpendRequest{
 		Outpoint:   spendRequest.Outpoint,
 		Script:     spendRequest.Script,
-		HeightHint: uint32(currentHeight),
+		HeightHint: currentHeight,
 	}
 	spendClient = node.RPC.RegisterSpendNtfn(req)
 
@@ -1582,7 +1582,7 @@ func publishTxAndConfirmSweep(ht *lntest.HarnessTest, node *node.HarnessNode,
 	require.NoError(ht, err)
 	spend := spendMsg.GetSpend()
 	require.NotNil(ht, spend)
-	require.Equal(ht, spend.SpendingHeight, uint32(currentHeight+1))
+	require.Equal(ht, spend.SpendingHeight, currentHeight+1)
 }
 
 // confirmAddress makes sure that a transaction in the mempool spends funds to
@@ -1609,11 +1609,11 @@ func confirmAddress(ht *lntest.HarnessTest, hn *node.HarnessNode,
 	addrPkScript, err := txscript.PayToAddrScript(parsedAddr)
 	require.NoError(ht, err)
 
-	_, currentHeight := ht.GetBestBlock()
+	currentHeight := ht.CurrentHeight()
 	req := &chainrpc.ConfRequest{
 		Script:       addrPkScript,
 		Txid:         txid[:],
-		HeightHint:   uint32(currentHeight),
+		HeightHint:   currentHeight,
 		NumConfs:     1,
 		IncludeBlock: true,
 	}
@@ -1628,7 +1628,7 @@ func confirmAddress(ht *lntest.HarnessTest, hn *node.HarnessNode,
 	require.NoError(ht, err)
 	conf := confMsg.GetConf()
 	require.NotNil(ht, conf)
-	require.Equal(ht, conf.BlockHeight, uint32(currentHeight+1))
+	require.Equal(ht, conf.BlockHeight, currentHeight+1)
 	require.NotNil(ht, conf.RawBlock)
 
 	// We should also be able to decode the raw block.

itest/lnd_test.go

@@ -151,7 +151,7 @@ func TestLightningNetworkDaemon(t *testing.T) {
 		}
 	}
 
-	_, height := harnessTest.GetBestBlock()
+	height := harnessTest.CurrentHeight()
 	t.Logf("=========> tests finished for tranche: %v, tested %d "+
 		"cases, end height: %d\n", trancheIndex, len(testCases), height)
 }

itest/lnd_zero_conf_test.go

@@ -962,7 +962,7 @@ func testZeroConfReorg(ht *lntest.HarnessTest) {
 	ht.AssertMinerBlockHeightDelta(tempMiner, 1)
 
 	// Wait for Carol to sync to the original miner's chain.
-	_, minerHeight := ht.GetBestBlock()
+	minerHeight := int32(ht.CurrentHeight())
 	ht.WaitForNodeBlockHeight(carol, minerHeight)
 
 	// Now we'll disconnect Carol's chain backend from the original miner

lntest/harness.go

@@ -105,6 +105,9 @@ type HarnessTest struct {
 	// cleaned specifies whether the cleanup has been applied for the
 	// current HarnessTest.
 	cleaned bool
+
+	// currentHeight is the current height of the chain backend.
+	currentHeight uint32
 }
 
 // harnessOpts contains functional option to modify the behavior of the various
@@ -433,7 +436,8 @@ func (h *HarnessTest) Subtest(t *testing.T) *HarnessTest {
 	st.feeService.Reset()
 
 	// Record block height.
-	_, startHeight := h.GetBestBlock()
+	h.updateCurrentHeight()
+	startHeight := int32(h.CurrentHeight())
 
 	st.Cleanup(func() {
 		_, endHeight := h.GetBestBlock()

lntest/harness_miner.go

@@ -31,6 +31,9 @@ func (h *HarnessTest) Miner() *miner.HarnessMiner {
 func (h *HarnessTest) MineBlocks(num int) {
 	require.Less(h, num, maxBlocksAllowed, "too many blocks to mine")
 
+	// Update the harness's current height.
+	defer h.updateCurrentHeight()
+
 	// Mine num of blocks.
 	for i := 0; i < num; i++ {
 		block := h.miner.MineBlocks(1)[0]
@@ -73,6 +76,9 @@ func (h *HarnessTest) MineBlocks(num int) {
 func (h *HarnessTest) MineEmptyBlocks(num int) []*wire.MsgBlock {
 	require.Less(h, num, maxBlocksAllowed, "too many blocks to mine")
 
+	// Update the harness's current height.
+	defer h.updateCurrentHeight()
+
 	blocks := h.miner.MineEmptyBlocks(num)
 
 	// Finally, make sure all the active nodes are synced.
@@ -90,6 +96,9 @@ func (h *HarnessTest) MineEmptyBlocks(num int) []*wire.MsgBlock {
 func (h *HarnessTest) MineBlocksAndAssertNumTxes(num uint32,
 	numTxs int) []*wire.MsgBlock {
 
+	// Update the harness's current height.
+	defer h.updateCurrentHeight()
+
 	// If we expect transactions to be included in the blocks we'll mine,
 	// we wait here until they are seen in the miner's mempool.
 	txids := h.AssertNumTxsInMempool(numTxs)
@@ -309,3 +318,15 @@ func (h *HarnessTest) SendRawTransaction(tx *wire.MsgTx,
 
 	return *txid, nil
 }
+
+// CurrentHeight returns the current block height.
+func (h *HarnessTest) CurrentHeight() uint32 {
+	return h.currentHeight
+}
+
+// updateCurrentHeight set the harness's current height to the best known
+// height.
+func (h *HarnessTest) updateCurrentHeight() {
+	_, height := h.GetBestBlock()
+	h.currentHeight = uint32(height)
+}