Struct MessagePayloadEnvelope 

pub struct MessagePayloadEnvelope {
    pub content: String,
    pub metadata: Option<Value>,
    pub reply_to_message_id: Option<String>,
    pub mentioned_user_ids: Option<Vec<u64>>,
    pub message_source: Option<MessageSource>,
}

Payload 解析后的顶层结构（content + metadata + 公共扩展）

Fields

content: String

消息显示内容

metadata: Option<Value>

类型相关元数据，按 ContentMessageType 解析为对应 *Metadata 结构体

reply_to_message_id: Option<String>

引用消息 ID（可选）

mentioned_user_ids: Option<Vec<u64>>

@ 提及的用户 ID 列表（可选）

message_source: Option<MessageSource>

非好友消息来源（可选）

Trait Implementations

impl Clone for MessagePayloadEnvelope

fn clone(&self) -> MessagePayloadEnvelope

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for MessagePayloadEnvelope

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for MessagePayloadEnvelope

fn default() -> MessagePayloadEnvelope

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for MessagePayloadEnvelope

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for MessagePayloadEnvelope

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.