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+NIP-58
+======
+
+Badges
+------
+
+`draft` `optional` `author:cameri`
+
+A special event meaning "Badge" is defined as an event with kind `8` having a list of `p` tags,
+one for each pubkey the author (issuer) wishes to award. A parameterized replaceable event meaning "Profile Badges" is defined as an event with kind `30008` with a `d` tag identifier equal to `profile_badges` and having an ordered list of `e` tags, one for each badge the user wishes to show on their profile. Badges as immutable events are non-transferrable.
+
+### Badge event
+
+A Badge's `content` field is a JSON-stringified object containing the fields `short_desc`, `image`, `thumbs` and optionally `long_desc`. In the case where `long_desc` is omitted, it is treated the same equal to `short_desc`.
+
+The `short_desc` and `long_desc` fields are strings that may contain the meaning behind the badge and/or
+the reason of it's issuance.
+
+The `image` field is the URL of a high-resolution image representing the badge.
+
+The `thumbs` field is an object containing thumbnail versions of the image referenced in the `image` field. The format of the keys are the dimensions `width`x`height` in pixels and the value is an URL pointing to respective thumbnail image.
+
+### Profile Badges Event
+
+The number of badges a pubkey can receive is unbounded. The Profile Badge event allows individual users to choose
+the badges (and order) to show on their profiles.
+
+The content is not used and SHOULD be blank.
+
+The `e` tags in the Profile Badge event MUST reference kind `8` events containing a `p` tag that matches that of the Profile Badge. Badges that don't meet this criteria MUST be ignored.
+
+### Motivation
+
+Users MAY be awarded badges in recognition, in gratitude, for participation, or in appreciation of a certain goal, task or cause.
+
+Users MAY choose to decorate their profiles with badges for fame, notoriety, recognition, support, etc., from badge issuers they deem reputable.
+
+### Recommendations
+
+Badge issuers MAY include some Proof of Work as per [NIP-13](03.md) when minting badges to embed them with an energy cost, arguably making them more special and valuable for users that wish to collect them.
+
+Clients MAY whitelist badge issuers (pubkeys) for the purpose of ensuring they retain a valuable/special factor for their users.
+
+Badge image recommended aspect ratio is 1:1 with a high-res size of 1024x1024 pixels.
+
+Badge thumbnail image recommended sizes are: 512x512 (xl), 256x256 (l), 64x64 (m), 32x32 (s) and 16x16 (xs).
+
+Clients SHOULD render the most appropriate badge thumbnail according to the number of badges chosen by the user and space available. Clients SHOULD render the high-res version on user action (click, tap, hover).
+
+### Example of Badge Event
+
+```json
+{
+  "id": "<charlie's issued badge event id>",
+  "kind": 8,
+  "pubkey": "<charlie's (issuer) pubkey>",
+  "tags": [
+    ["p", "<alice's (recipient) pubkey in hex>"]
+  ],
+  "content": "{
+    \"long_desc\": \"This user joined our relay 2 years ago.\",
+    \"short_desc\": \"Two-Year Club\",
+    \"image\": \"https://relay.nostr/badges/two-year-club.png\",
+    \"thumbs\": {
+      \"512x512\": \"https://relay.nostr/badges/two-year-club-512x512.png\",
+      \"256x256\": \"https://relay.nostr/badges/two-year-club-256x256.png\",
+      \"128x128\": \"https://relay.nostr/badges/two-year-club-128x128.png\",
+      \"64x64\": \"https://relay.nostr/badges/two-year-club-64x64.png\",
+      \"32x32\": \"https://relay.nostr/badges/two-year-club-32x32.png\",
+      \"16x16\": \"https://relay.nostr/badges/two-year-club-16x16.png\",
+    }
+  }",
+  ...other fields...
+}
+```
+
+### Example of a Profile Badges Event
+
+```json
+{
+  "kind": 30008,
+  "pubkey": "<alice's pubkey in hex>",
+  "content": "",
+  "tags": [
+    ["e", "<charlie's issued badge event id>"],
+  ]
+  ...other fields...
+}
+```