ingest: add wire format for incoming messages

ingest/message.go

@@ -0,0 +1,24 @@
+package ingest
+
+// Twitch is the shape required of Twitch EventSub chat message events.
+// Fields that Kaiyan does not need are dropped for efficiency.
+type Twitch struct {
+	// Broadcaster is the broadcaster user ID.
+	Broadcaster string `json:"broadcaster_user_id"`
+	// Chatter is the user ID of the user who sent the message.
+	Chatter string `json:"chatter_user_id"`
+	// ID is the message ID.
+	ID string `json:"message_id"`
+	// Message is the message content.
+	Message TwitchContent `json:"message"`
+	// SourceBroadcaster is the user ID of the broadcaster whose chat was the
+	// one to which this message was sent originally, in the case of shared chat.
+	// If it is not a shared chat message, then this is the empty string.
+	SourceBroadcaster NullableString `json:"source_broadcaster_user_id"`
+}
+
+// TwitchContent is the content of a Twitch message event.
+// Fields that Kaiyan does not need are dropped for efficiency.
+type TwitchContent struct {
+	Text string `json:"text"`
+}