PutUvarint encodes a uint64 into buf and returns the number of bytes written.

PutVarint encodes an int64 into buf and returns the number of bytes written.

ReadUvarint reads an encoded unsigned integer from r and returns it as a uint64.

ReadVarint reads an encoded signed integer from r and returns it as an int64.

global instrument map which is fully synchronized.

a fill on an order or quote.

an exchange trade, not necessarily initiated by the current client.