entity/dag: proper base operation for simplified implementation

- reduce boilerplace necessary to implement an operation
- consolidate what an operation is in the core, which in turn pave the way for a generic cache layer mechanism
- avoid the previously complex unmarshalling process
- support operation metadata from the core
- simplified testing

1 files changed, 1 insertions, 1 deletions

diff --git a/entity/dag/entity.go b/entity/dag/entity.go
index f3229b7e..4ccf0e0e 100644
--- a/entity/dag/entity.go
+++ b/entity/dag/entity.go
@@ -26,7 +26,7 @@ type Definition struct {
 	// the Namespace in git references (bugs, prs, ...)
 	Namespace string
 	// a function decoding a JSON message into an Operation
-	OperationUnmarshaler func(author identity.Interface, raw json.RawMessage, resolver identity.Resolver) (Operation, error)
+	OperationUnmarshaler func(raw json.RawMessage, resolver identity.Resolver) (Operation, error)
 	// the expected format version number, that can be used for data migration/upgrade
 	FormatVersion uint
 }