Function mango_v4::state::new_node_key

pub fn new_node_key(side: Side, price_data: u64, seq_num: u64) -> u128

Creates a binary tree node key.

It’s used for sorting nodes (ascending for asks, descending for bids) and encodes price data in the top 64 bits followed by an ordering number in the lower bits.

The seq_num that’s passed should monotonically increase. It’s used to choose the ordering number such that orders placed later for the same price data are ordered after earlier orders.