frame

type Command struct {
	Cmd  string          `json:"cmd"`
	ID   int64           `json:"id,omitempty"`
	Args json.RawMessage `json:"args,omitempty"`

	Auth *FrameAuth `json:"auth,omitempty"`

	// Timestamp (as number of seconds since Epoch) of when the command result is no longer relevant.
	Deadline int64 `json:"deadline,omitempty"`

	// Number of seconds after reception of the command after when the command result is no longer relevant.
	Timeout int64 `json:"timeout,omitempty"`

	Trace *Trace `json:"trace,omitempty"`
}

type Error struct {
	Code    int    `json:"code"`
	Message string `json:"message,omitempty"`
}

type Frame struct {
	// Version denotes the protocol version in use. Must be set to 1.
	Version int `json:"v,omitempty"`

	// Src is the ID of the sender.
	Src string `json:"src,omitempty"`

	// Dst is the ID of the recipient.
	Dst string `json:"dst,omitempty"`

	// Key should contains pre-shared key if client certificates are not used.
	Key string `json:"key,omitempty"`

	// Tag, if present, should be copied verbatim to the response frame.
	Tag string `json:"tag,omitempty"`

	ID int64 `json:"id,omitempty"`

	// Request
	Method string          `json:"method,omitempty"`
	Params json.RawMessage `json:"params,omitempty"`
	// Timestamp (as number of seconds since Epoch) of when the command result is no longer relevant.
	Deadline int64 `json:"deadline,omitempty"`
	// Number of seconds after reception of the command after when the command result is no longer relevant.
	Timeout int64 `json:"timeout,omitempty"`

	// Response
	Result json.RawMessage `json:"result,omitempty"`
	Error  *Error          `json:"error,omitempty"`

	Trace *Trace `json:"trace,omitempty"`

	Auth *FrameAuth `json:"auth,omitempty"`

	// Size hint, if present, gives approximate size of the frame in memory.
	SizeHint int `json:"-"`

	// Send no response to this frame
	NoResponse bool `json:"nr,omitempty"`

	DeprecatedArgs json.RawMessage `json:"args,omitempty"`
}

type FrameAuth struct {
	Realm     string `json:"realm"`
	Username  string `json:"username"`
	Nonce     int    `json:"nonce"`
	CNonce    int    `json:"cnonce"`
	Algorithm string `json:"algorithm,omitempty"`
	Response  string `json:"response"`
	Opaque    string `json:"opaque,omitempty"`
}

type Response struct {
	ID int64 `json:"id"`

	// Status code. Non-zero value means error.
	Status int `json:"status"`

	// Human-readable explanation of an error, if any.
	StatusMsg string `json:"status_msg,omitempty"`

	// Application defined response payload
	Response json.RawMessage `json:"resp,omitempty"`
}

type Trace struct {
	// Dapper trace ID
	TraceID int64 `json:"id,omitempty"`
	// Dapper span ID
	SpanID int64 `json:"span,omitempty"`
}