using-nostr

# NOSTR Posting Skill
# Using nostr-sdk library
# Source: https://github.com/besoeasy/nostr-sdk

## Overview
Post messages, send encrypted DMs, and interact with the Nostr decentralized social protocol using minimal direct exports from the `nostr-sdk` module.

**Installation:**
```bash
npm install nostr-sdk
```

**Key Concepts:**
- **nsec**: Private key in bech32 format (starts with `nsec1`)
- **npub**: Public key in bech32 format (starts with `npub1`)
- **Relays**: WebSocket servers that propagate Nostr events
- **Events**: Signed JSON objects representing posts, DMs, etc.
- **POW**: Proof of Work (mining) to reduce spam

**Default Relays:**
- wss://relay.damus.io
- wss://nos.lol
- wss://relay.snort.social
- wss://nostr-pub.wellorder.net
- wss://nostr.oxtr.dev
- And 9+ more for maximum reach

---

## Skills

### post_public_note

Post a public text note to Nostr.

**Usage:**
```javascript
const { posttoNostr } = require("nostr-sdk");

const result = await posttoNostr("Hello Nostr! #introduction", {
  nsec: "nsec1...your-private-key",
  tags: [],
  relays: null,
  powDifficulty: 4
});
console.log(result);
```

**Parameters:**
- `message`: Text content to post
- `tags`: Optional array of tags (e.g., `[['t', 'topic']]`)
- `relays`: Optional custom relay list (uses defaults if null)
- `powDifficulty`: Proof of work difficulty (default: 4, 0 to disable)

**Auto-extracted Tags:**
- Hashtags: `#nostr` → `["t", "nostr"]`
- Mentions: `@npub1...` → `["p", <pubkey>]`
- Links: URLs automatically preserved
- Notes: `note1...` references → `["e", <event-id>]`

**Response:**
```javascript
{
  success: true,
  eventId: "abc123...",
  published: 12,      // Successfully published to 12 relays
  failed: 2,          // Failed on 2 relays
  totalRelays: 14,
  powDifficulty: 4,
  errors: []
}
```

**When to use:**
- User wants to post a public message
- Sharing content with hashtags
- Broadcasting announcements

---

### reply_to_post

Reply to an existing Nostr post.

**Usage:**
```javascript
const { replyToPost } = require("nostr-sdk");

const result = await replyToPost(
  "note1...event-id",           // Event ID (note or hex format)
  "Great post! @npub1...author", // Reply message
  "npub1...author-pubkey",      // Author's public key
  [],                           // Additional tags
  null,                         // Use default relays
  4                             // POW difficulty
);
```

**When to use:**
- Responding to a specific post
- Thread conversations
- Engaging with content

---

### send_encrypted_dm (NIP-4)

Send encrypted direct message using legacy NIP-4 standard.

**Usage:**
```javascript
const { sendmessage } = require("nostr-sdk");

const result = await sendmessage(
  "npub1...recipient",    // Recipient's public key
  "Secret message here",  // Message content
  { nsec: "nsec1...your-private-key" }
);
```

**When to use:**
- Compatibility with older Nostr clients
- Basic encrypted messaging
- Wide client support

**Limitations:**
- Sender/recipient metadata visible
- Older encryption (NIP-04)

---

### send_encrypted_dm_modern (NIP-17)

Send gift-wrapped encrypted message using NIP-17 (recommended).

**Usage:**
```javascript
const { sendMessageNIP17 } = require("nostr-sdk");

const result = await sendMessageNIP17(
  "npub1...recipient",    // Recipient's public key
  "Private message!",     // Message content
  { nsec: "nsec1...your-private-key" }
);
```

**Benefits:**
- Sealed sender (hides who sent the message)
- Better metadata protection
- Modern NIP-44 encryption
- Ephemeral keys for each message

**When to use:**
- Maximum privacy needed
- Modern applications
- Hiding sender identity

---

### receive_messages (NIP-4)

Listen for incoming direct messages.

**Usage:**
```javascript
const { getmessage } = require("nostr-sdk");

const unsubscribe = getmessage((message) => {
  console.log("From:", message.senderNpub);
  console.log("Message:", message.content);
  console.log("Time:", new Date(message.timestamp * 1000));
}, {
  nsec: "nsec1...your-private-key",
  since: Math.floor(Date.now() / 1000) - 3600  // Last hour
});

// Stop listening:
// unsubscribe();
```

**Message Object:**
```javascript
{
  id: "event-id",
  sender: "hex-pubkey",
  senderNpub: "npub1...",
  content: "decrypted message",
  timestamp: 1234567890,
  event: { /* full event */ }
}
```

**When to use:**
- Building a chat bot
- Receiving DMs
- Monitoring for messages

---

### receive_messages_modern (NIP-17)

Listen for incoming NIP-17 gift-wrapped messages.

**Usage:**
```javascript
const { getMessageNIP17 } = require("nostr-sdk");

const unsubscribe = getMessageNIP17((message) => {
  console.log("From:", message.senderNpub);
  console.log("Content:", message.content);
  console.log("Wrapped ID:", message.wrappedEventId);
}, {
  nsec: "nsec1...your-private-key",
  since: Math.floor(Date.now() / 1000) - 300  // Last 5 minutes
});

// Stop listening:
// unsubscribe();
```

**When to use:**
- Receiving modern private messages
- Maximum privacy for incoming DMs
- Supporting NIP-17 protocol

---

### get_global_feed

Fetch recent posts from the global Nostr feed.

**Usage:**
```javascript
const { getGlobalFeed } = require("nostr-sdk");

const events = await getGlobalFeed({
  limit: 50,                                    // Max 50 posts
  since: Math.floor(Date.now() / 1000) - 3600, // Last hour
  until: null,                                  // Up to now
  kinds: [1],                                   // Text notes only
  authors: null,                                // All authors
  relays: null                                  // Use defaults
});

events.forEach(event => {
  console.log("Author:", event.authorNpub);
  console.log("Content:", event.content);
  console.log("Note ID:", event.noteId);
  console.log("Posted:", event.createdAtDate);
});
```

**When to use:**
- Building a feed reader
- Monitoring public posts
- Trending content analysis

---

### generate_keys

Generate new Nostr key pair.

**Usa