itest: fix tests regarding the new sweeper behavior

This commit fix watchtower, channel backup, and route blinding tests re
the new sweeper behavior.

itest/lnd_channel_backup_test.go

@@ -1268,9 +1268,6 @@ func testDataLossProtection(ht *lntest.HarnessTest) {
 	// Dave should have a pending sweep.
 	ht.AssertNumPendingSweeps(dave, 1)
 
-	// Mine a block to trigger the sweep.
-	ht.MineBlocks(1)
-
 	// Dave should sweep his funds.
 	ht.AssertNumTxsInMempool(1)
 

itest/lnd_route_blinding_test.go

@@ -1029,10 +1029,13 @@ func testErrorHandlingOnChainFailure(ht *lntest.HarnessTest) {
 	ht.AssertNumPendingSweeps(ht.Bob, 0)
 	ht.MineBlocksAndAssertNumTxes(1, 1)
 
-	// Assert that the HTLC has cleared.
-	ht.WaitForBlockchainSync(ht.Bob)
-	ht.WaitForBlockchainSync(ht.Alice)
+	// Clean up the rest of our force close: mine blocks so that Bob's CSV
+	// expires plus one block to trigger his sweep and then mine it.
+	ht.MineBlocks(node.DefaultCSV - 1)
+	ht.AssertNumPendingSweeps(ht.Bob, 1)
+	ht.MineBlocksAndAssertNumTxes(1, 1)
 
+	// Assert that the HTLC has cleared.
 	ht.AssertHTLCNotActive(ht.Bob, testCase.channels[0], hash[:])
 	ht.AssertHTLCNotActive(ht.Alice, testCase.channels[0], hash[:])
 
@@ -1046,11 +1049,6 @@ func testErrorHandlingOnChainFailure(ht *lntest.HarnessTest) {
 		lnrpc.Failure_INVALID_ONION_BLINDING,
 	)
 
-	// Clean up the rest of our force close: mine blocks so that Bob's CSV
-	// expires plus one block to trigger his sweep and then mine it.
-	ht.MineBlocks(node.DefaultCSV + 1)
-	ht.MineBlocksAndAssertNumTxes(1, 1)
-
 	// Bring carol back up so that we can close out the rest of our
 	// channels cooperatively. She requires an interceptor to start up
 	// so we just re-register our interceptor.

itest/lnd_watchtower_test.go

@@ -579,16 +579,6 @@ func testRevokedCloseRetributionAltruistWatchtowerCase(ht *lntest.HarnessTest,
 
 	ht.AssertNumPendingForceClose(dave, 0)
 
-	// If this is an anchor channel, Dave would offer his sweeper the
-	// anchor. However, due to no time-sensitive outputs involved, the
-	// anchor sweeping won't happen as it's uneconomical.
-	if lntest.CommitTypeHasAnchors(commitType) {
-		ht.AssertNumPendingSweeps(dave, 1)
-
-		// Mine a block to trigger the sweep.
-		ht.MineEmptyBlocks(1)
-	}
-
 	// Check that Dave's wallet balance is increased.
 	err = wait.NoError(func() error {
 		daveBalResp := dave.RPC.WalletBalance()

itest/lnd_wipe_fwdpkgs_test.go

@@ -117,9 +117,6 @@ func testWipeForwardingPackages(ht *lntest.HarnessTest) {
 	// Alice should one pending sweep.
 	ht.AssertNumPendingSweeps(alice, 1)
 
-	// Mine a block to trigger the sweep.
-	ht.MineBlocks(1)
-
 	// Mine 1 block to get Alice's sweeping tx confirmed.
 	ht.MineBlocksAndAssertNumTxes(1, 1)