multi: return input.Signature from SignOutputRaw

htlcswitch/mock.go

@@ -852,7 +852,9 @@ type mockSigner struct {
 	key *btcec.PrivateKey
 }
 
-func (m *mockSigner) SignOutputRaw(tx *wire.MsgTx, signDesc *input.SignDescriptor) ([]byte, error) {
+func (m *mockSigner) SignOutputRaw(tx *wire.MsgTx,
+	signDesc *input.SignDescriptor) (input.Signature, error) {
+
 	amt := signDesc.Output.Value
 	witnessScript := signDesc.WitnessScript
 	privKey := m.key
@@ -877,7 +879,7 @@ func (m *mockSigner) SignOutputRaw(tx *wire.MsgTx, signDesc *input.SignDescripto
 		return nil, err
 	}
 
-	return sig[:len(sig)-1], nil
+	return btcec.ParseDERSignature(sig[:len(sig)-1], btcec.S256())
 }
 func (m *mockSigner) ComputeInputScript(tx *wire.MsgTx, signDesc *input.SignDescriptor) (*input.Script, error) {