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+# Enums and bitfields and such
+
+Various interesting enums/bitfields/etc found by inspecting the client source
+
+## `usage_flags`
+
+Bitfield which tracks which premium features you have used in order
+to convince you out of unsubscribing from premium features.
+
+| name                  | value |
+| --------------------- | ----- |
+| PREMIUM_DISCRIMINATOR | 1     |
+| ANIMATED_AVATAR       | 2     |
+| PROFILE_BANNER        | 4     |
+
+## `purchased_flags`
+
+Bitfield which may track which premium features have ever been bought on this account.
+Uses the values of each [premium type](https://discord.com/developers/docs/resources/user#user-object-premium-types)
diff --git a/docs/contributing/Reverse Engineering/client/index.md b/docs/contributing/Reverse Engineering/client/index.md
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+# Client reverse engineering
+
+## [Enums](enums.md)
diff --git a/docs/contributing/Reverse Engineering/index.md b/docs/contributing/Reverse Engineering/index.md
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+# Reverse Engineering
+
+This section contains various articles relating to the reverse engineering of Discord and it's client.
+
+There are various other resources that have been incredibly helpful in our endevours, such as:
+
+-   [Discord user docs](https://docs.discord.food)
+-   [Luna's unofficial Discord docs](https://luna.gitlab.io/discord-unofficial-docs/)
+-   [Litecord](https://gitlab.com/litecord/litecord)
+-   [DiscordLists](https://github.com/Delitefully/DiscordLists)
+-   [Discord Datamining](https://github.com/Discord-Datamining/Discord-Datamining)
+-   [Discord.js](https://discord.js.org) and other bot implementations