Store and retrieve extra-data in/from db.

Also, add more specs to db.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/db.hrl b/src/db.hrl
index b5ceb2e..bea9131 100644
--- a/src/db.hrl
+++ b/src/db.hrl
@@ -11,5 +11,7 @@
           entryhash :: binary(),     % Hash over #plop_entry{} in mtl.
           mtlhash :: binary(),       % Merkle Tree Leaf hash.
           mtl :: mtl(),              % Merkle Tree Leaf.
+          extra_data :: binary(),    % Data not part of mtl.
           spt :: spt()               % Signed Plop Timestamp.
          }).
+-type plop() :: #plop{}.