/// Singleton instance
final instance = Nostr.instance;

/// Constructor
final instance = Nostr();

final newKeyPair = instance.keysService.generateKeyPair();

print(newKeyPair.public); // Public key
print(newKeyPair.private); // Private key

final somePrivateKey = "HERE IS MY PRIVATE KEY";

final newKeyPair = instance.keysService
      .generateKeyPairFromExistingPrivateKey(somePrivateKey);

print(somePrivateKey == newKeyPair.private); // true
print(newKeyPair.public); // Public key

/// sign a message with a private key
final signature = instance.keysService.sign(
  privateKey: keyPair.private,
  message: "hello world",
);

print(signature);

/// verify a message with a public key
final verified = instance.keysService.verify(
  publicKey: keyPair.public,
  message: "hello world",
  signature: signature,
);

print(verified); // true

// work with nsec keys
instance.keysService.encodePrivateKeyToNsec(privateKey);
instance.keysService.decodeNsecKeyToPrivateKey(privateKey);

// work with npub keys
instance.keysService.encodePublicKeyToNpub(privateKey);
instance.keysService.decodeNpubKeyToPublicKey(privateKey);

// more keys derivations and validations methods
instance.keysService.derivePublicKey(privateKey);
instance.keysService.generatePrivateKey(privateKey);
instance.keysService.isValidPrivateKey(privateKey);

// general utilities that related to keys
instance.utilsService.decodeBech32(bech32String);
instance.utilsService.encodeBech32(bech32String);
instance.utilsService.pubKeyFromIdentifierNip05(bech32String);

final event = NostrEvent.fromPartialData(
  kind: 1,
  content: 'example content',
  keyPairs: keyPair, // will be used to sign the event
  tags: [
    ['t', currentDateInMsAsString],
  ],
);

print(event.id); // event id
print(event.sig); // event signature

print(event.serialized()); // event as serialized JSON

try {
 
 final relays = ['wss://relay.damus.io'];
 
 await instance.relaysService.init(
  relaysUrl: relays,
 );

print("connected successfully")
} catch (e) {
  print(e);
}

```dart
// Creating a request to be sent to the relays. (as example this request will get all events with kind 1 of the provided public key)
final request = NostrRequest(
  filters: [
    NostrFilter(
      kinds: const [1],
      authors: [keyPair.public],
    ),
  ],
);


// Starting the subscription and listening to events
final nostrStream = Nostr.instance.relaysService.startEventsSubscription(
  request: request,
  onEose: (ease) => print(ease),
);

print(nostrStream.subscriptionId); // The subscription id

// Listening to events
nostrStream.stream.listen((NostrEvent event) {
  print(event.content);
});

// close the subscription later
nostrStream.close();

// Creating a request to be sent to the relays. (as example this request will get all events with kind 1 of the provided public key)
final request = NostrRequest(
  filters: [
    NostrFilter(
      kinds: const [1],
      authors: [keyPair.public],
    ),
  ],
);

// Call the async method and wait for the result
final events =
    await Nostr.instance.relaysService.startEventsSubscriptionAsync(
  request: request,
);

// print the events
print(events.map((e) => e.content));

// reconnect
await Nostr.instance.relaysService.reconnectToRelays(
       onRelayListening: onRelayListening,
       onRelayConnectionError: onRelayConnectionError,
       onRelayConnectionDone: onRelayConnectionDone,
       retryOnError: retryOnError,
       retryOnClose: retryOnClose,
       shouldReconnectToRelayOnNotice: shouldReconnectToRelayOnNotice,
       connectionTimeout: connectionTimeout,
       ignoreConnectionException: ignoreConnectionException,
       lazyListeningToRelays: lazyListeningToRelays,
     );
    
// disconnect
await Nostr.instance.relaysService.disconnectFromRelays();

// sending synchronously
Nostr.instance.relaysService.sendEventToRelays(
  event,
  onOk: (ok) => print(ok),
);

// sending synchronously with a custom timeout
final okCommand = await Nostr.instance.relaysService.sendEventToRelaysAsync(
  event,
  timeout: const Duration(seconds: 3),
);

print(okCommand);

// create a count event
final countEvent = NostrCountEvent.fromPartialData(
  eventsFilter: NostrFilter(
    kinds: const [0],
    authors: [keyPair.public],
  ),
);

// Send the count event synchronously
Nostr.instance.relaysService.sendCountEventToRelays(
  countEvent,
  onCountResponse: (countRes) {
    print('count: $countRes');
  },
);

// Send the count event asynchronously
final countRes = await Nostr.instance.relaysService.sendCountEventToRelaysAsync(
  countEvent,
  timeout: const Duration(seconds: 3),
);

print("found ${countRes.count} events");

final relayDoc = await Nostr.instance.relaysService.relayInformationsDocumentNip11(
  relayUrl: "wss://relay.damus.io",
);

print(relayDoc?.name);
print(relayDoc?.description);
print(relayDoc?.contact);
print(relayDoc?.pubkey);
print(relayDoc?.software);
print(relayDoc?.supportedNips);
print(relayDoc?.version);

// work with nevent and nevent
final nevent = Nostr.instance.utilsService.encodeNevent(
  eventId: event.id,
  pubkey: pubkey,
  userRelays: [],
);
  
print(nevent);

final map = Nostr.instance.utilsService.decodeNeventToMap(nevent);
print(map);


// work with nprofile
final nprofile = Nostr.instance.utilsService.encodeNProfile(
  pubkey: pubkey,
  userRelays: [],
);

print(nprofile);

final map = Nostr.instance.utilsService.decodeNprofileToMap(nprofile);
print(map);

final random = Nostr.instance.utilsService.random64HexChars();
final randomButBasedOnInput = Nostr.instance.utilsService.consistent64HexChars("input");

print(random);
print(randomButBasedOnInput);

/// verify a nip05 identifier
final verified = await Nostr.instance.utilsService.verifyNip05(
  internetIdentifier: "[email protected]",
  pubKey: pubKey,
);

print(verified); // true

  
/// Validate a nip05 identifier format
final isValid = Nostr.instance.utilsService.isValidNip05Identifier("[email protected]");
print(isValid); // true

/// Get the pubKey from a nip05 identifier
final pubKey = await Nostr.instance.utilsService.pubKeyFromIdentifierNip05(
  internetIdentifier: "[email protected]",
);
  
print(pubKey);

Nostr.instance.utilsService.countDifficultyOfHex("002f");