input: add ResolutionBlob method to inputKit

We also update breachedOutput w/ the new API.

contractcourt/breach_arbitrator.go

@@ -15,6 +15,7 @@ import (
 	"github.com/btcsuite/btcd/wire"
 	"github.com/lightningnetwork/lnd/chainntnfs"
 	"github.com/lightningnetwork/lnd/channeldb"
+	"github.com/lightningnetwork/lnd/fn"
 	"github.com/lightningnetwork/lnd/input"
 	"github.com/lightningnetwork/lnd/kvdb"
 	"github.com/lightningnetwork/lnd/labels"
@@ -22,6 +23,7 @@ import (
 	"github.com/lightningnetwork/lnd/lnutils"
 	"github.com/lightningnetwork/lnd/lnwallet"
 	"github.com/lightningnetwork/lnd/lnwallet/chainfee"
+	"github.com/lightningnetwork/lnd/tlv"
 )
 
 const (
@@ -1067,6 +1069,10 @@ type breachedOutput struct {
 	secondLevelTapTweak      [32]byte
 
 	witnessFunc input.WitnessGenerator
+
+	resolutionBlob fn.Option[tlv.Blob]
+
+	// TODO(roasbeef): function opt and hook into brar
 }
 
 // makeBreachedOutput assembles a new breachedOutput that can be used by the
@@ -1174,6 +1180,12 @@ func (bo *breachedOutput) UnconfParent() *input.TxInfo {
 	return nil
 }
 
+// ResolutionBlob returns a special opaque blob to be used to sweep/resolve this
+// input.
+func (bo *breachedOutput) ResolutionBlob() fn.Option[tlv.Blob] {
+	return bo.resolutionBlob
+}
+
 // Add compile-time constraint ensuring breachedOutput implements the Input
 // interface.
 var _ input.Input = (*breachedOutput)(nil)