lnwallet: add aux test utils

We add this constructor for an AuxHtlcDescriptor that allows setting
some of the internal fields. This is useful for testing purposes for
code external to this package that may need to extensively test the
AuxHtlcView.

lnwallet/aux_test_utils.go

@@ -0,0 +1,31 @@
+package lnwallet
+
+import (
+	"github.com/lightningnetwork/lnd/lnwire"
+)
+
+// NewTestAuxHtlcDescriptor creates an AuxHtlcDescriptor for testing purposes.
+// This function allows tests to create descriptors with specific commit heights
+// and entry types, which are normally unexported fields.
+func NewTestAuxHtlcDescriptor(chanID lnwire.ChannelID,
+	rHash PaymentHash, timeout uint32,
+	amount lnwire.MilliSatoshi, htlcIndex, parentIndex uint64,
+	entryType uint8, customRecords lnwire.CustomRecords,
+	addHeightLocal, addHeightRemote, removeHeightLocal,
+	removeHeightRemote uint64) AuxHtlcDescriptor {
+
+	return AuxHtlcDescriptor{
+		ChanID:                   chanID,
+		RHash:                    rHash,
+		Timeout:                  timeout,
+		Amount:                   amount,
+		HtlcIndex:                htlcIndex,
+		ParentIndex:              parentIndex,
+		EntryType:                updateType(entryType),
+		CustomRecords:            customRecords,
+		addCommitHeightLocal:     addHeightLocal,
+		addCommitHeightRemote:    addHeightRemote,
+		removeCommitHeightLocal:  removeHeightLocal,
+		removeCommitHeightRemote: removeHeightRemote,
+	}
+}