sweep: properly handle failed sweeping txns

contractcourt/anchor_resolver.go

@@ -108,7 +108,7 @@ func (c *anchorResolver) Resolve() (ContractResolver, error) {
 
 		// Anchor was swept by someone else. This is possible after the
 		// 16 block csv lock.
-		case sweep.ErrRemoteSpend:
+		case sweep.ErrRemoteSpend, sweep.ErrInputMissing:
 			c.log.Warnf("our anchor spent by someone else")
 			outcome = channeldb.ResolverOutcomeUnclaimed
 

docs/release-notes/release-notes-0.19.0.md

@@ -352,6 +352,11 @@ The underlying functionality between those two options remain the same.
 * A code refactor that [replaces min/max helpers with built-in min/max
   functions](https://github.com/lightningnetwork/lnd/pull/9451).
 
+* [Unified](https://github.com/lightningnetwork/lnd/pull/9448) the monitoring
+  inputs spending logic in the sweeper so it can properly handle missing inputs
+  and recover from restart.
+
+
 ## Tooling and Documentation
 
 * [Improved `lncli create` command help text](https://github.com/lightningnetwork/lnd/pull/9077)

itest/list_on_test.go

@@ -662,6 +662,10 @@ var allTestCases = []*lntest.TestCase{
 		Name:     "invoice migration",
 		TestFunc: testInvoiceMigration,
 	},
+	{
+		Name:     "fee replacement",
+		TestFunc: testFeeReplacement,
+	},
 }
 
 // appendPrefixed is used to add a prefix to each test name in the subtests