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+# Waku Wacky Whisper Specification
+
+> Version: 0.1 (Draft)
+
+> Authors: Infura "The Devil" Osaka <noreply@status.im>
+
+Basically Infura for chat. Addresses scalability issues of Whisper by sacrificing metadata protection. Specifically for resource restricted devices like mobilephones with limited data plan.
+
+インフラ (Infura) means infrastructure in Japanese, and 枠 (Waku) is a closely related word that means 'frame' or 'slide'.
+
+## Rationale
+
+Many users put a premium on bandwidth usage over metadata protection. Implementing Waku mode gives users a more performant experience, at the expense of metadata protection and requiring stronger connectivity.
+
+For more background, please see Whisper theoretical model [report](https://htmlpreview.github.io/?https://github.com/vacp2p/research/blob/master/whisper_scalability/report.html) with associated [source code](https://github.com/vacp2p/research/tree/master/whisper_scalability).
+
+## Roles and definitions
+
+1. Waku-chan
+2. Waku-san (aka Waku node)
+
+A client is said to implement waku mode if it connects to a Waku node and acts as a Waku-chan. The Waku node connects to the rest of the Whisper network.
+
+## Amendments to Whisper
+
+Waku mode is compatible with [EIP-627](https://eips.ethereum.org/EIPS/eip-627)
+and simplify extends its capabilities. It does this through a new packet code,
+as well as some client specific recommendations. Two specific protocol changes
+are done:
+
+1. Modify EIP627 by adding a new packet code, e..g `Topic List [101, bytes]` where bytes is a list of N topics.
+
+Format TBD.
+
+2. Provide way to identify oneself as a Waku node.
+
+Method TBD.
+
+## Recommendations for clients
+
+1. Avoid duplicate envelopes
+
+To avoid duplicate envelopes, only connect to one Waku node. Benign duplicate
+envelopes is an intrinsic property of Whisper which often leads to a N factor
+increase in traffic, where N is the number of peers you are connected to.
+
+2. Topic specific recommendations
+
+TBD.