PluralKit/Myriad/Gateway/GatewayPacket.cs

using System.Text.Json.Serialization;

namespace Myriad.Gateway;

public record GatewayPacket
{
    [JsonPropertyName("op")] public GatewayOpcode Opcode { get; init; }
    [JsonPropertyName("d")] public object? Payload { get; init; }

    [JsonPropertyName("s")]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public int? Sequence { get; init; }

    [JsonPropertyName("t")]
    [JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
    public string? EventType { get; init; }
}

public enum GatewayOpcode
{
    Dispatch = 0,
    Heartbeat = 1,
    Identify = 2,
    PresenceUpdate = 3,
    VoiceStateUpdate = 4,
    Resume = 6,
    Reconnect = 7,
    RequestGuildMembers = 8,
    InvalidSession = 9,
    Hello = 10,
    HeartbeatAck = 11
}