json

type MessageJSON struct {
	Message *SyncMessageJSON `json:",omitempty"`
	Request *SyncRequestJSON `json:",omitempty"`
	Reply   *SyncReplyJSON   `json:",omitempty"`
	Ack     *SyncAckJSON     `json:",omitempty"`
}

type SyncAckJSON struct{}

type SyncMessageJSON struct {
	Chain json.RawMessage
}

type SyncReplyJSON struct {
	Link json.RawMessage
}

type SyncRequestJSON struct {
	From uint64
}