core: types: use []byte for block Payload type (#101)

Change payload type to []byte instead of [][]byte to make it more
generic. The user of the consensus core should marshal the payload into
a byte slice by themselves.

1 files changed, 3 insertions, 3 deletions

diff --git a/core/test/app.go b/core/test/app.go
index 60b74ac..76f1a10 100644
--- a/core/test/app.go
+++ b/core/test/app.go
@@ -102,9 +102,9 @@ func NewApp() *App {
 	}
 }
 
-// PreparePayloads implements Application interface.
-func (app *App) PreparePayloads(position types.Position) [][]byte {
-	return [][]byte{}
+// PreparePayload implements Application interface.
+func (app *App) PreparePayload(position types.Position) []byte {
+	return []byte{}
 }
 
 // VerifyPayloads implements Application.