Event class

The only object type that exists is the event, which has the following format on the wire:

"id": "32-bytes hex-encoded sha256 of the the serialized event data"
"pubkey": "32-bytes hex-encoded public key of the event creator",
"created_at": unix timestamp in seconds,
"kind": integer,
"tags": [ "e", "32-bytes hex of the id of another event", "recommended relay URL", "p", "32-bytes hex of the key", "recommended relay URL" ],
"content": "arbitrary string",
"sig": "64-bytes signature of the sha256 hash of the serialized event data, which is the same as the 'id' field"

Implementers

Constructors

Event.new(String id, String pubkey, int createdAt, int kind, List<List<String>> tags, String content, String sig, {String? subscriptionId, bool verify = true}): Default constructor
Event.deserialize(dynamic input, {bool verify = true}): Deserialize a nostr event message
factory
Event.from({int? createdAt, required int kind, List<List<String>> tags = const [], required String content, required String privkey, String? subscriptionId, bool verify = false}): Instantiate Event object from the minimum needed data
factory
Event.fromJson(Map<String, dynamic> json, {bool verify = true}): Deserialize an event from a JSON
factory
Event.partial({dynamic id = "", dynamic pubkey = "", dynamic createdAt = 0, dynamic kind = 1, dynamic tags = const <List<String>>[], dynamic content = "", dynamic sig = "", dynamic subscriptionId, bool verify = false}): Partial constructor, you have to fill the fields yourself
factory

content ↔ String: arbitrary string
getter/setter pair
createdAt ↔ int: unix timestamp in seconds
getter/setter pair
hashCode → int: The hash code for this object.
no setterinherited
id ↔ String: 32-bytes hex-encoded sha256 of the the serialized event data (hex)
getter/setter pair
kind ↔ int: 0: set_metadata: the content is set to a stringified JSON object {name:

1: text_note: the content is set to the text content of a note (anything the user wants to say). Non-plaintext notes should instead use kind 1000-10000 as described in NIP-16.

2: recommend_server: the content is set to the URL (e.g., wss://somerelay.com) of a relay the event creator wants to recommend to its followers.

getter/setter pair
pubkey ↔ String: 32-bytes hex-encoded public key of the event creator (hex)
getter/setter pair
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited
sig ↔ String: 64-bytes signature of the sha256 hash of the serialized event data, which is the same as the "id" field
getter/setter pair
subscriptionId ↔ String?: subscription_id is a random string that should be used to represent a subscription.
getter/setter pair
tags ↔ List<List<String>>: The tags array can store a tag identifier as the first element of each subarray, plus arbitrary information afterward (always as strings).
getter/setter pair

getEventId() → String: To obtain the event.id, we sha256 the serialized event. The serialization is done over the UTF-8 JSON-serialized string (with no white space or line breaks) of the following structure:
getSignature(String privateKey) → String: Each user has a keypair. Signatures, public key, and encodings are done according to the Schnorr signatures standard for the curve secp256k1 64-bytes signature of the sha256 hash of the serialized event data, which is the same as the "id" field
isValid() → bool: Verify if event checks such as id, signature, non-futuristic are valid Performances could be a reason to disable event checks
noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
serialize() → String: Serialize to nostr event message
toJson() → Map<String, dynamic>: Serialize an event in JSON
toString() → String: A string representation of this object.
inherited