channel: Improve Data documentation

Signed-off-by: Matthias Geihs <[email protected]>
perun-network · May 30, 2022 · fed956a · fed956a
1 parent 11bbe2a
commit fed956a
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/channel/state.go b/channel/state.go
@@ -55,6 +55,8 @@ type (
 	// It is sent as binary data over the wire. For unmarshaling a data from
 	// binary representation, use App.NewData() to create an instance of Data
 	// specific to this application and then unmarshal using it.
+	//
+	// The encoding must be stable, that is, E(data) = E(D(E(data))).
 	Data interface {
 		encoding.BinaryMarshaler
 		encoding.BinaryUnmarshaler