Struct Action 

#[repr(C)]
pub struct Action {
    pub order_id: u64,
    pub px_1e9: u64,
    pub qty_1e8: i64,
    pub side: i8,
    pub is_cancel: u8,
    pub order_type: u8,
    pub venue_id: u8,
    pub _pad: [u8; 4],
}

Order action (place, cancel, or amend).

32 bytes, #[repr(C)]. Byte 27 is venue_id:

• 0 = default venue (backward compatible — old algos never set this byte)
• 1..N = specific VenueId (from NbboSnapshot.venue_ids[])

is_cancel field doubles as action type:

• 0 = new order (ACTION_NEW)
• 1 = cancel (ACTION_CANCEL)
• 2 = amend (ACTION_AMEND) — modifies price/qty of existing order

Fields

order_id: u64

px_1e9: u64

qty_1e8: i64

side: i8

is_cancel: u8

order_type: u8

venue_id: u8

_pad: [u8; 4]

Trait Implementations

impl Clone for Action

fn clone(&self) -> Action

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Action

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Action

fn default() -> Action

Returns the “default value” for a type.

impl Copy for Action