Add Secure Scuttlebutt as a possible database engine

content/engine/technology-stack/database.en.md

@@ -3,10 +3,16 @@ title = "Database"
 weight = "70"
 +++
 
-**Note:** this decision is under review.
+**Note:** this decision is under review. Options:
+
+## LevelDB
 
 **Note:** What can we learn from our experience with [Heartbeat Node](https://source.ind.ie/project/heartbeat-node) - e.g., regarding the use of LevelDB for this purpose? (e.g., see the [implementation of the StreamWeaver class](https://source.ind.ie/project/heartbeat-node/blob/master/StreamWeaver.coffee)).
 
+## Secure Scuttlebutt
+
+[Secure Scuttlebutt](https://github.com/ssbc/secure-scuttlebutt) is built on LevelDB, specifically for p2p messaging. Would the higher-level abstraction aid or limit us?
+
 ## RethinkDB
 
 RethinkDB is a realtime database that has a changefeeds feature that could simplify our production footprint/deployment requirements, server-side code dramatically and enable us to keep an event-driven workflow throughout.