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rewrite NIP-46.
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46.md
178
46.md
@ -2,161 +2,83 @@ NIP-46
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======
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Nostr Connect
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------------------------
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-------------
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`draft` `optional`
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## Rationale
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This NIP describes a method for 2-way communication between a **remote signer** and a normal Nostr client. The remote signer could be, for example, a hardware device dedicated to signing Nostr events, while the client is a normal Nostr client.
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Private keys should be exposed to as few systems - apps, operating systems, devices - as possible as each system adds to the attack surface.
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## Signer Discovery
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Entering private keys can also be annoying and requires exposing them to even more systems such as the operating system's clipboard that might be monitored by malicious apps.
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The client must somehow be able to contact the signer through a common relay.
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### Started by the signer
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## Terms
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The remote signer generates a connection token in the form
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* **App**: Nostr app on any platform that *requires* to act on behalf of a nostr account.
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* **Signer**: Nostr app that holds the private key of a nostr account and *can sign* on its behalf.
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```
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<npub1...>#<secret>?relay=wss://...&relay=wss://...
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```
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The user copies that token and pastes it in the client UI somehow. Then the client can send events of kind `24133` to the specified relays and wait for responses from the remote signer.
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## `TL;DR`
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### Started by the client
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The client generates a QR code in the following form (URL-encoded):
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**App** and **Signer** sends ephemeral encrypted messages to each other using kind `24133`, using a relay of choice.
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```
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nostrconnect://<client-key-hex>?relay=wss://...&metadata={"name":"client-name"}
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```
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App prompts the Signer to do things such as fetching the public key or signing events.
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The signer scans the QR code and sends a `connect` message to the client in the specified relays.
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The `content` field must be an encrypted JSONRPC-ish **request** or **response**.
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## Event payloads
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## Signer Protocol
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Event payloads are [NIP-04](04.md)-encrypted JSON blobs that look like JSONRPC.
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### Messages
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Events sent by the client to the remote signer have the following format:
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#### Request
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```json
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```js
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{
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"id": <random_string>,
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"method": <one_of_the_methods>,
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"params": [<anything>, <else>]
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"pubkey": "<client-key-hex>"
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"kind": 24133,
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"tags": [
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["p", "<signer-key-hex>"]
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],
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"content": "nip04_encrypted_json({id: <random-string>, method: <see-below>, params: []})",
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...
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}
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```
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#### Response
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And the events the remote signer sends to the client have the following format:
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```json
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{
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"id": <request_id>,
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"result": <anything>,
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"error": <reason>
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}
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```js
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"pubkey": "<signer-key-hex>"
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"kind": 24133,
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"tags": [
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["p", "<client-key-hex>"]
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],
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"content": "nip04_encrypted_json({id: <request-id>, result: <any>, error: <reason-string>})",
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...
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```
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### Methods
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#### Mandatory
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These are mandatory methods the remote signer app MUST implement:
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- **describe**
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- params []
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- result `["describe", "get_public_key", "sign_event", "connect", "disconnect", "delegate", ...]`
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- **get_public_key**
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- params []
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- result `pubkey`
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- **sign_event**
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- params [`event`]
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- result `event_with_signature`
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#### optional
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- **connect**
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- params [`pubkey`]
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- **disconnect**
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- params []
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- **delegate**
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- params [`delegatee`, `{ kind: number, since: number, until: number }`]
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- result `{ from: string, to: string, cond: string, sig: string }`
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- params: [`pubkey`, `secret`]
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- result: `null`
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- **get_public_key**
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- params: []
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- result: `pubkey`
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- **sign_event**
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- params: [`event`]
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- result: `event_with_pubkey_id_and_signature`
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- **get_relays**
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- params []
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- result `{ [url: string]: {read: boolean, write: boolean} }`
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- params: []
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- result: `{ [url: string]: {read: boolean, write: boolean} }`
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- **nip04_encrypt**
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- params [`pubkey`, `plaintext`]
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- result `nip4 ciphertext`
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- params: [`pubkey`, `plaintext`]
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- result: `nip4 ciphertext`
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- **nip04_decrypt**
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- params [`pubkey`, `nip4 ciphertext`]
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- result [`plaintext`]
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NOTICE: `pubkey` and `signature` are hex-encoded strings.
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### Nostr Connect URI
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**Signer** discovers **App** by scanning a QR code, clicking on a deep link or copy-pasting an URI.
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The **App** generates a special URI with prefix `nostrconnect://` and base path the hex-encoded `pubkey` with the following querystring parameters **URL encoded**
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- `relay` URL of the relay of choice where the **App** is connected and the **Signer** must send and listen for messages.
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- `metadata` metadata JSON of the **App**
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- `name` human-readable name of the **App**
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- `url` (optional) URL of the website requesting the connection
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- `description` (optional) description of the **App**
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- `icons` (optional) array of URLs for icons of the **App**.
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#### JavaScript
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```js
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const uri = `nostrconnect://<pubkey>?relay=${encodeURIComponent("wss://relay.damus.io")}&metadata=${encodeURIComponent(JSON.stringify({"name": "Example"}))}`
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```
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#### Example
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```sh
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nostrconnect://b889ff5b1513b641e2a139f661a661364979c5beee91842f8f0ef42ab558e9d4?relay=wss%3A%2F%2Frelay.damus.io&metadata=%7B%22name%22%3A%22Example%22%7D
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```
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## Flows
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The `content` field contains encrypted message as specified by [NIP04](https://github.com/nostr-protocol/nips/blob/master/04.md). The `kind` chosen is `24133`.
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### Connect
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1. User clicks on **"Connect"** button on a website or scan it with a QR code
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2. It will show an URI to open a "nostr connect" enabled **Signer**
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3. In the URI there is a pubkey of the **App** ie. `nostrconnect://<pubkey>&relay=<relay>&metadata=<metadata>`
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4. The **Signer** will send a message to ACK the `connect` request, along with his public key
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### Disconnect (from App)
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1. User clicks on **"Disconnect"** button on the **App**
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2. The **App** will send a message to the **Signer** with a `disconnect` request
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3. The **Signer** will send a message to ACK the `disconnect` request
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### Disconnect (from Signer)
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1. User clicks on **"Disconnect"** button on the **Signer**
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2. The **Signer** will send a message to the **App** with a `disconnect` request
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### Get Public Key
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1. The **App** will send a message to the **Signer** with a `get_public_key` request
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3. The **Signer** will send back a message with the public key as a response to the `get_public_key` request
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### Sign Event
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1. The **App** will send a message to the **Signer** with a `sign_event` request along with the **event** to be signed
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2. The **Signer** will show a popup to the user to inspect the event and sign it
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3. The **Signer** will send back a message with the event including the `id` and the schnorr `signature` as a response to the `sign_event` request
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### Delegate
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1. The **App** will send a message with metadata to the **Signer** with a `delegate` request along with the **conditions** query string and the **pubkey** of the **App** to be delegated.
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2. The **Signer** will show a popup to the user to delegate the **App** to sign on his behalf
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3. The **Signer** will send back a message with the signed [NIP-26 delegation token](https://github.com/nostr-protocol/nips/blob/master/26.md) or reject it
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- params: [`pubkey`, `nip4 ciphertext`]
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- result: [`plaintext`]
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