### Development Setup (Shell)

Source: https://github.com/diegogurpegui/nos2x-fox/blob/main/README.md

Provides the necessary commands to clone the repository, install dependencies, and build the nos2x-fox extension for development or local testing. This process sets up the project environment and compiles the extension files.

```shell
$ git clone https://github.com/diegogurpegui/nos2x-fox
$ cd nos2x-fox
$ yarn install
$ yarn run build
```

--------------------------------

### Nostr Signer Extension API (JavaScript)

Source: https://github.com/diegogurpegui/nos2x-fox/blob/main/README.md

Defines the interface provided by the nos2x-fox extension for web applications to interact with the Nostr network. It includes methods for getting the public key, signing events, retrieving relay configurations, and performing NIP-04 and NIP-44 encrypted messaging.

```javascript
async window.nostr.getPublicKey(): string // returns your public key as hex
async window.nostr.signEvent(event): Event // returns the full event object signed
async window.nostr.getRelays(): { [url: string]: RelayPolicy } // returns a map of relays

async window.nostr.nip04.encrypt(pubkey, plaintext): string // returns ciphertext+iv as specified in nip04
async window.nostr.nip04.decrypt(pubkey, ciphertext): string // takes ciphertext+iv as specified in nip04

async window.nostr.nip44.encrypt(pubkey, plaintext): string // takes pubkey, plaintext, returns ciphertext as specified in nip-44
async window.nostr.nip44.decrypt(pubkey, ciphertext): string // takes pubkey, ciphertext, returns plaintext as specified in nip-44
```

=== COMPLETE CONTENT === This response contains all available snippets from this library. No additional content exists. Do not make further requests.