nostr.ts copilot preview

Below are the exact response I get from GPT4 when asking questions about github.com/BlowaterNostr/nostr.ts

It will be interesting to also release a copilot for nostr.ts

To implement a reply to a Direct Message (DM) in Nostr protocols, you would typically create a new event that references the original event and is also encrypted so that only the intended recipient can read it. Here's an outline of how you could implement this:

1. Identify the Original Message: You need the original event ID that you're replying to. This ID can be found as the id attribute of the NostrEvent object.

2. Compose a Reply: Present the user with an interface to compose their reply.

3. Add Reference to Original Message: When the new message (event) is created, include a tag in the tags field that references the original message's ID. In Nostr, referencing an event typically uses a tag in the format ["e", "<event_id>"].

4. Encrypt the Reply: Encrypt the content of the reply using the recipient's public key so that only they can decrypt and read it. In Nostr, DMs are kind 4, and the content must be encrypted.

5. Publish the Event: Sign the new event with the sender's private key and publish it to the relays.

Here is a TypeScript implementation based on your files:

import { NostrKind, NostrEvent, TagEvent } from "./nostr.ts";
import { prepareEncryptedNostrEvent } from "./event.ts";
import { InMemoryAccountContext } from "./nostr.ts";
import { ConnectionPool } from "./relay-pool.ts";
import { PrivateKey } from "./key.ts";

/**
 * Send a reply to a direct message in Nostr
 * @param senderPrivateKey - Sender's private key.
 * @param originalEvent - The original event to which we are replying.
 * @param replyContent - The content of the reply.
 * @param recipientPubKey - The recipient's public key, used to encrypt the message.
 * @param relayPool - Instance of ConnectionPool to send the event.
 */
async function replyToDM(
  senderPrivateKey: string,
  originalEvent: NostrEvent,
  replyContent: string,
  recipientPubKey: string,
  relayPool: ConnectionPool
): Promise<void | Error> {
  // Instantiate your account context with your private key
  const senderAccountContext = InMemoryAccountContext.FromString(senderPrivateKey);

  if (senderAccountContext instanceof Error) {
    return senderAccountContext;
  }

  // Create the reference to the original message's ID
  const referenceToOriginal: TagEvent = ["e", originalEvent.id];

  // Prepare the encrypted event
  const replyEventResult = await prepareEncryptedNostrEvent(senderAccountContext, {
    encryptKey: recipientPubKey, // The recipient's public key for encryption
    kind: NostrKind.DIRECT_MESSAGE,
    content: replyContent,
    tags: [referenceToOriginal], // Include the reference to the original event
  });

  if (replyEventResult instanceof Error) {
    return replyEventResult;
  }

  // Use the relay pool to publish the event to the network
  const err = await relayPool.sendEvent(replyEventResult);
  if (err instanceof Error) {
    return err;
  }
}

Usage:

To reply to a message, you should already have an instance of ConnectionPool that handles your connection to Nostr relays, the private key object of the sender, the public key of the recipient, the content of the reply, and the original message object:

const senderPrivateKey = 'your-private-key';
const originalMessage = { /*...*/ }; // Original message object (`NostrEvent`)
const replyContent = 'Your reply message here';
const recipientPublicKey = 'recipient-public-key';

// Existing instance of ConnectionPool connected to Nostr relays
const relayPool = new ConnectionPool();

// Then call the function to send a reply
await replyToDM(senderPrivateKey, originalMessage, replyContent, recipientPublicKey, relayPool);

Ensure you handle the potential errors that may occur during these operations. This function should carry out all necessary tasks to format and send a direct message reply in the Nostr network.