# akiratorizawa/fintech-toolkit architecture

> Architecture diagram of the GitHub repository akiratorizawa/fintech-toolkit, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-11-12). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/akiratorizawa/fintech-toolkit
- Repository: https://github.com/akiratorizawa/fintech-toolkit

## Overview

This is a small, single-file Java console fintech toolkit. A user enters through the main menu, which offers credit-card validation, currency denomination, and monthly-installment tools; the sampled code shows the installment calculation and currency breakdown, but not all menu dispatches or the card-validation implementation. The graph preserves those documented menu capabilities while marking unsampled routes as unverified. No separate storage or external services are evident.

Main entry points: [`Main.java`](https://github.com/akiratorizawa/fintech-toolkit/blob/main/Main.java) (Main menu)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_interface["Console interface"]
  node_menu["Main menu<br/>[Main.java]"]
end

subgraph group_tools["Finance tools"]
  node_card["Card validator<br/>[Main.java]"]
  node_currency["Denomination calculator<br/>[Main.java]"]
  node_installment["Installment calculator<br/>[Main.java]"]
end

node_user(("User"))

node_user -->|"enters choices"| node_menu
node_menu -.->|"offers option"| node_card
node_menu -.->|"offers option"| node_currency
node_menu -->|"dispatches option"| node_installment

click node_menu "https://github.com/akiratorizawa/fintech-toolkit/blob/main/Main.java"
click node_card "https://github.com/akiratorizawa/fintech-toolkit/blob/main/Main.java"
click node_currency "https://github.com/akiratorizawa/fintech-toolkit/blob/main/Main.java"
click node_installment "https://github.com/akiratorizawa/fintech-toolkit/blob/main/Main.java"

classDef toneNeutral fill:#f8fafc,stroke:#334155,stroke-width:1.5px,color:#0f172a
classDef toneBlue fill:#dbeafe,stroke:#2563eb,stroke-width:1.5px,color:#172554
classDef toneAmber fill:#fef3c7,stroke:#d97706,stroke-width:1.5px,color:#78350f
classDef toneMint fill:#dcfce7,stroke:#16a34a,stroke-width:1.5px,color:#14532d
classDef toneRose fill:#ffe4e6,stroke:#e11d48,stroke-width:1.5px,color:#881337
classDef toneIndigo fill:#e0e7ff,stroke:#4f46e5,stroke-width:1.5px,color:#312e81
classDef toneTeal fill:#ccfbf1,stroke:#0f766e,stroke-width:1.5px,color:#134e4a
class node_menu,node_user toneBlue
class node_card,node_currency,node_installment toneAmber
```

## Components

### Console interface

- [Main menu](https://github.com/akiratorizawa/fintech-toolkit/blob/main/Main.java): `Main.java`

### Finance tools

- [Card validator](https://github.com/akiratorizawa/fintech-toolkit/blob/main/Main.java): `Main.java`
- [Denomination calculator](https://github.com/akiratorizawa/fintech-toolkit/blob/main/Main.java): `Main.java`
- [Installment calculator](https://github.com/akiratorizawa/fintech-toolkit/blob/main/Main.java): `Main.java`

### Other components

- **User**

## Connections

- User → Main menu: enters choices (evidence: `Main.java`)
- Main menu → Card validator: offers option (evidence: `Main.java`)
- Main menu → Denomination calculator: offers option (evidence: `Main.java`)
- Main menu → Installment calculator: dispatches option (evidence: `Main.java`)