decodeNostrMsg function

NostrMessageRaw decodeNostrMsg(String msgJsonStr)

Implementation

NostrMessageRaw decodeNostrMsg(String msgJsonStr) {
  try {
    final decoded = jsonDecode(msgJsonStr);

    if (decoded is! List || decoded.isEmpty) {
      return NostrMessageRaw(type: NostrMessageRawType.unknown);
    }

    final msgTypeStr = decoded[0];
    switch (msgTypeStr) {
      case 'NOTICE':
        return NostrMessageRaw(
          type: NostrMessageRawType.notice,
          otherData: decoded,
        );
      case 'EVENT':
        if (decoded.length < 3) {
          return NostrMessageRaw(type: NostrMessageRawType.unknown);
        }
        final requestId = decoded[1];
        final eventData = decoded[2];
        final nip01Event = Nip01Event(
          id: eventData['id'],
          pubKey: eventData['pubkey'],
          createdAt: eventData['created_at'],
          kind: eventData['kind'],
          tags: (eventData['tags'] as List)
              .map((tag) => List<String>.from(tag))
              .toList(),
          content: eventData['content'],
          sig: eventData['sig'],
          validSig: null,
        );
        return NostrMessageRaw(
          type: NostrMessageRawType.event,
          nip01Event: nip01Event,
          requestId: requestId,
        );
      case 'EOSE':
        return NostrMessageRaw(
          type: NostrMessageRawType.eose,
          requestId: decoded.length > 1 ? decoded[1] : null,
          otherData: decoded,
        );
      case 'OK':
        return NostrMessageRaw(
          type: NostrMessageRawType.ok,
          otherData: decoded,
        );
      case 'CLOSED':
        return NostrMessageRaw(
          type: NostrMessageRawType.closed,
          otherData: decoded,
        );
      case 'AUTH':
        return NostrMessageRaw(
          type: NostrMessageRawType.auth,
          otherData: decoded,
        );
      case 'NEG-MSG':
        return NostrMessageRaw(
          type: NostrMessageRawType.negMsg,
          requestId: decoded.length > 1 ? decoded[1] : null,
          otherData: decoded,
        );
      case 'NEG-ERR':
        return NostrMessageRaw(
          type: NostrMessageRawType.negErr,
          requestId: decoded.length > 1 ? decoded[1] : null,
          otherData: decoded,
        );
      default:
        return NostrMessageRaw(
          type: NostrMessageRawType.unknown,
          otherData: decoded,
        );
    }
  } catch (e) {
    return NostrMessageRaw(
      type: NostrMessageRawType.unknown,
      otherData: msgJsonStr,
    );
  }
}