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+# NIP-100
+
+
+## NOSTR Decentralized Advertising Network (NOSTR-DAN)
+-------------------
+`draf` `optional`
+
+This NIP defines the `kind:20100`: a parameterized event dispatched to a listener or pool of listeners to offer space for advertising,
+a listener can answer accepting the offer and contracting the space.
+
+## Motivation
+-------------------
+Most of the digital social networks are based on data-driven advertising, then NOSTR-based applications can also
+take competitive advantages learning it from industry to improve earnings in the NOSTR ecossystem.
+
+## Problem
+-------------------
+Using the centralized adversting networking is staying in hand of the big companies.
+
+## Solution
+-------------------
+The implementation of the NOSTR Decentralized Advertising Network (NOSTR-DAN) allows the NOSTR-based applications
+implement features to display ads to the users and distribute ads to the pool of partners.
+
+## Competitive Advantages for Stakeholders
+-------------------
+| stakeholder | advantage |
+| ----------- | ----------|
+| investors and entrepreuners | profitable feature |
+| content creators | profitable feature |
+| tech professionals | new profitable industry, new NOSTR-jobs |
+
+## Properties
+
+| Property | Help |
+| ---------| ---------|
+|`action` | `start-offer`, `assign-offer`, `paid`, `cancel-offer`|
+| `offer` | offer identity {`pubkey`, `created_at`, `created_at`, `expires_at`,  `tags`, `description`}|
+| `schema` | Accepted data schemas for the ad be displayed (example: https://schema.org/LocalBusiness), each pool can define your own custom schema |
+| `schemaName` | What schema is being used to structure the ad |
+|`cluster`| Marketing parameters about the audience cluster that will see the ad |
+| `transaction`| Conditions to contract and pay the offer |
+| `whitelist` | List of wallets that can contract and pay for this offer |
+| `bannedlist` | List of wallets that CANNOT contract this offer |
+
+
+## Schemas
+
+The concept of schema is based on the https://schema.org/LocalBusiness to offer more freedom to pools and communities decide how to delivery your ads, because ads can have custom properties according to the industry and products/services evolutions.
+
+## Example of usage
+
+- The client dispatch the event to the pool offering space to advertisers
+- The listeners (advertisers) understand the event and decide if contract or not the space
+
+### Dispatched Event (Request Body)
+
+The application send an event offering space to advertisers
+
+```json
+{
+"kind": 20100,
+"action": "start-offer",
+"schema": [env.POOL.SCHEMA],
+"offer": {
+  "pubkey": env.MYPUBKEY,
+  "created_at": 1704012878,
+  "expires_at": 1704016478,
+  "tag": env.TAG,
+  "description": "Announce your ecommerce on www.example.com"
+},
+"cluster":
+  {
+    "userAgent": env.WEBBROWSER.DESKTOP.[FIREFOX | CHROME | EDGE | ...],
+    "country": env.COUNTRY,
+  },
+"transaction":
+  {
+    "paymentModel": "prepaid",
+    "price":
+      {
+        "btc": {
+            "min": 0.0001
+          },
+        "eth": {
+            "min": 0.001
+          }
+      },
+    "conditions":
+      {
+        "maxViews": 100,
+        "maxHours": 24,
+        "formats": ["image/png,jpg,gif", "text/html,plain", ...]
+        ...another properties about the conditions (specified by Schema)
+      }
+  },
+  "whitelist":[env.LISTERNER.wallet.address],
+  "bannedlist":[env.LISTERNER.wallet.wallet.address]
+}
+```
+
+### Listener contracted the space to display ad
+
+The advertiser (listener) decided to contract the space to display the ad,
+then answer with:
+
+```json
+{
+  "kind": 20100,
+  "action": "assign-offer",
+  "assign_at": "1704012879",
+  "cancel_at": "1704012880",
+  "offer": {
+    "pubkey": env.PUBKEY,
+    "created_at": 1704012878,
+    "expires_at": 1704016478,
+    "tag": env.TAG
+  },
+  "transaction": {
+    "currency": "btc",
+    "amount": 0.0001,
+    "wallet": env.MYWALLET.address
+  },
+  "schema":{
+    "schemaName": env.POOL.SCHEMA,
+    "properties": {
+      "format": "text/html",
+      "content": "",
+      ...custom community schema of properties (specified by Schema)
+
+    }
+    
+  }
+}
+```
+
+### Client accepts contract and answer with wallet
+
+```json
+{
+  "kind": 20100,
+  "action": "assign-offer",
+  "assign_at": "1704012879",
+  "cancel_at": "1704012880",
+  "offer": {
+    "pubkey": env.PUBKEY,
+    "created_at": 1704012878,
+    "expires_at": 1704016478,
+    "tag": env.TAG
+  },
+  "transaction": {
+    "wallet": env.MYWALLET.address
+  },
+}
+```
+
+### Listener (Advertiser) announces payment
+```json
+{
+  "kind": 20100,
+  "action": "paid",
+  "paid_at": "1704012879",
+  "offer": {
+    "pubkey": env.PUBKEY,
+    "created_at": 1704012878,
+    "expires_at": 1704016478,
+    "tag": env.TAG
+  },
+  "transaction": {
+    "wallet": env.MYWALLET.address
+  },
+}
+```
+
+## REVIEW
+
+- NOSTR-DAN needs only to members to work:
+  - The client that offers spaces to the advertisers
+  - The listeners (advertisers) that contract the spaces to advertise
+- NOSTR-DAN community can create custom schemas for your ads, allowing the dynamic communication required by competitive industries and unpredictable market changes
+- Members of the NOSTR-DAN can apply the whitelist and bannedlist to filter ads
+
+