Constant TX_SLOT_BYTE_SIZE 

pub const TX_SLOT_BYTE_SIZE: usize = _ /* 32_768usize */;

Validation constants. Validation constants. Validation constants. TX_SLOT_BYTE_SIZE is used to calculate how many data slots a single transaction takes up based on its byte size. The slots are used as DoS protection, ensuring that validating a new transaction remains a constant operation (in reality O(maxslots), where max slots are 4 currently).