Merge pull request #389 from perun-network/get-signed-state

Grant access to SignedState

.golangci.yml

@@ -44,7 +44,7 @@ linters-settings:
   goheader:
     values:
       regexp:
-        ANY_YEAR: "20(19|20|21|22)" # 2019-2022
+        ANY_YEAR: "20(19|2\\d)" # 2019-2029
     template-path: ".scripts/copyright-notice"
   forbidigo:
     forbid:

client/transparentchannel.go

@@ -0,0 +1,38 @@
+// Copyright 2023 - See NOTICE file for copyright holders.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package client
+
+import "perun.network/go-perun/channel"
+
+// TransparentChannel grants access to the `SignedState` of the underlying
+// channel, which is otherwise hidden by `Channel`. Behaves like a normal channel in
+// all other cases.
+type TransparentChannel struct {
+	*Channel
+}
+
+// NewTransparentChannel returns a new `TransparentChannel` from a `Channel`.
+func NewTransparentChannel(c *Channel) *TransparentChannel {
+	return &TransparentChannel{c}
+}
+
+// SignedState returns the current signed state of the channel.
+func (c *TransparentChannel) SignedState() channel.SignedState {
+	return channel.SignedState{
+		Params: c.Params(),
+		State:  c.machine.CurrentTX().State,
+		Sigs:   c.machine.CurrentTX().Sigs,
+	}
+}