Message Catalog

◀ WebSocket API (V2)

The .proto files define every message and field. This page maps each envelope payload to its message and the proto file that describes it.

All messages travel inside a transport envelope, one Protobuf message per WebSocket binary frame:

• ClientMessage — Client → Server messages
• ServerMessage — Server → Client messages

Each envelope is a oneof: exactly one payload is set. Read the payload case to know what you received.

message ClientMessage {
  oneof payload {
    Heartbeat            heartbeat          = 1;
    auth.LoginRequest    login_request      = 2;
    market.MarketSubscribe    market_subscribe   = 100;
    account.AccountSubscribe  account_subscribe  = 200;
    orderrouting.OrderSubmit  order_submit       = 300;
    // ...
  }
}

message ServerMessage {
  oneof payload {
    Heartbeat            heartbeat          = 1;
    auth.LoginResponse   login_response     = 2;
    market.MarketSnapshot     market_snapshot    = 108;
    account.AccountSnapshot   account_snapshot   = 205;
    orderrouting.OrderUpdate  order_update       = 300;
    // ...
  }
}

The full envelope is in proto/t4/v2/service.proto.

Proto Files in the T4 GitHub Repository