x7: Add req and provide skeleton

x7.md

@@ -9,6 +9,45 @@ created: 2019-04-18
 updated:
 ---
 
+## Introduction
+
+## Requirements
+
+TODO: Elaborate on requirement such as devp2p and possibly Whisper, and geth/parity/nimbus gotchas.
+
+## Design goals
+
+TODO: Elaborate on selection of design goals such as
+Privacy
+
+Sender Anonymity
+Recipient Anonymity
+Particip. Anonymity
+Unlinkability
+Global Adv. Resistant
+Usability
+
+Contact Discovery
+No Message Delays
+No Message Drops
+Easy Initialization
+No Fees Required
+Adoption
+
+Topology Independent
+No Additional Service
+Spam/Flood Resistant
+Low Storage
+Low Bandwidth
+Low Computation
+Asynchronous
+Scalable
+
+NOTE: We are probably not fulfilling all of these very well, and this is something we can note as well. "Ideally such a layer would provide...currently this isn't doing and we are doing further research into better options."
+
+
+# Raw import from previous document
+
 **TODO: Specify transport privacy through Whisper and guarantees**
 
 See https://notes.status.im/sDKuBAiPSH6iB9cFmEKLyg?both# for things that we want to capture here.