jane-street-functional-trading

What problem does it solve?

This Skill provides a blueprint for building robust, high-assurance trading systems by adopting the rigorous functional programming and correctness-focused methodologies pioneered by Jane Street.

Core Features & Use Cases

• Correctness by Construction: Employs strong typing and immutability to prevent invalid states.
• Explicit Error Handling: Utilizes Result types for predictable error management, avoiding runtime exceptions.
• Pure Functions: Encourages the use of pure functions for critical logic like pricing models, enhancing testability and reasoning.
• State Machines: Models complex workflows like order lifecycles using exhaustive pattern matching on sum types.
• Property-Based Testing: Integrates Quickcheck for rigorous validation of system invariants.
• Use Case: Develop a new pricing engine for options, ensuring that all edge cases and potential errors are handled explicitly and that the core pricing logic is easily verifiable.

Quick Start

Apply Jane Street's principles to design an order submission function that uses Result types for error handling.