Module types 

Module: types

Responsibility

Provides the core validated newtype wrappers used throughout fin-primitives: Symbol, Price, Quantity, Side, and NanoTimestamp.

Guarantees

• Symbol: non-empty, no whitespace; backed by Arc<str> for O(1) clone
• Price: strictly positive (> 0)
• Quantity: non-negative (>= 0)
• NanoTimestamp: nanosecond-resolution UTC epoch timestamp; inner field is private
• All types implement Clone, Copy (where applicable), serde::{Serialize, Deserialize}

NOT Responsible For

• Currency conversion
• Tick size enforcement (exchange-specific)

Structs

NanoTimestamp

Exchange-epoch timestamp with nanosecond resolution.

Price

A strictly positive price value backed by Decimal.

Quantity

A non-negative quantity backed by Decimal.

Symbol

A validated ticker symbol: non-empty, contains no whitespace.

Enums

Side

The side of a market order or book level.