write price level to each book

Joel Grunbaum

2022-01-12 e8c910e52d1807e2fcca3b43d80a9df6acac5387

 protocol.hpp

@@ -12,6 +12,7 @@

// Catchup utilities
std::unordered_map<std::string, book::Book> recoverBook();
void catchUp(std::unordered_map<std::string, book::Book>& bs);

// Outgoing messages
json::Message* addOrder(json::AddMessage& order);