Show a list of known sticker packs.
+=== addStickerPack
+
+Install a sticker pack for this account.
+
+*--uri* [URI]::
+Specify the uri of the sticker pack.
+e.g. https://signal.art/addstickers/#pack_id=XXX&pack_key=XXX)"
+
=== getAttachment
Gets the raw data for a specified attachment.