Why does this skill forbid using f64 for money?

Floating-point numbers like f64 can lead to rounding errors and precision loss during arithmetic. This skill enforces the use of the rust_decimal crate to ensure exactness required for financial compliance.

What are the primary Rust crates recommended by this skill?

The skill prioritizes rust_decimal for math, chrono for timestamps, uuid for transaction IDs, and validator for ensuring financial data integrity.

Does this skill support multi-currency applications?

Yes, it provides a Currency Newtype pattern that prevents developers from accidentally performing arithmetic on mismatched currency types, like adding USD to EUR without an exchange step.

How does this skill help with regulatory audits?

It implements patterns for immutable records and structured logging. By using event sourcing and Arc-wrapped data, it ensures every transaction is traceable and cannot be modified after the fact.

Rust FinTech Domain Expert

Name: Rust FinTech Domain Expert
Author: lywa1998

bylywa1998

0•

Desarrollo de API

Enforces strict financial engineering standards in Rust, ensuring precision math, immutable audit trails, and regulatory compliance.

This skill equips Claude with specialized knowledge for architecting robust financial applications in Rust. It focuses on the critical pillars of FinTech development: eliminating precision errors by mandating rust_decimal over floating-point types, ensuring data integrity through immutable event sourcing patterns, and maintaining strict consistency with double-entry accounting principles. By providing concrete implementation patterns for currency newtypes, audit logging, and transaction boundaries, it serves as an essential guide for developers building trading systems, digital wallets, or payment gateways where mathematical accuracy and traceability are non-negotiable.

Características Principales

01Standardizes currency handling through type-safe Newtype patterns

02Guides double-entry accounting logic to ensure ledger consistency

03Implements immutable audit trails using event sourcing and Arc patterns

04Integrates structured tracing for regulatory compliance and debugging

05Enforces rust_decimal usage to prevent floating-point precision loss

060 GitHub stars

Casos de Uso

01Creating an auditable internal ledger for multi-currency transactions

02Building a high-frequency trading platform or crypto exchange

03Developing a secure payment gateway with automated reconciliation

What are Skills?·How to Install

Install with 🐟 Skill.Fish

npx skillfish add lywa1998/self-host-claude-marketplace domain-fintech

For use in Claude.ai and ChatGPT

Download Skill