# pritam-swe/100xdevs-wintercamp architecture

> Architecture diagram of the GitHub repository pritam-swe/100xdevs-wintercamp, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-11-10). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/pritam-swe/100xdevs-wintercamp
- Repository: https://github.com/pritam-swe/100xdevs-wintercamp

## Overview

This repository is a set of course exercises and small application demos, rather than one integrated product. Its clearest user-to-result workflows are the Todo API (HTTP request through route validation and handlers to Mongo-backed data) and the authentication API (signup/login through validation and handlers to user records). The README also identifies a Kalshi project and orderbook topics, but sampled evidence does not establish its runtime wiring. Several unsampled modules are represented by their exact tree paths; their internal links are omitted where evidence is unavailable.

Main entry points: [`class-2.5-auth-25th-oct-extra/src/app.js`](https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/class-2.5-auth-25th-oct-extra/src/app.js) (Auth app), [`class-2.5-auth-25th-oct-extra/src/routes/auth.route.js`](https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/class-2.5-auth-25th-oct-extra/src/routes/auth.route.js) (Auth routes), [`todo-backend/src/index.js`](https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/todo-backend/src/index.js) (Todo server), [`todo-backend/src/routes/todo.route.js`](https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/todo-backend/src/routes/todo.route.js) (Todo routes)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_learning["Language exercises"]
  node_async["Async exercises"]
end

subgraph group_backend["Backend demos"]
  node_fundamentals["Express fundamentals<br/>[index.js]"]
  node_notes["Notes backend<br/>[server.js]"]
end

subgraph group_todo["Todo API"]
  node_todo_entry["Todo server<br/>[index.js]"]
  node_todo_routes["Todo routes<br/>[todo.route.js]"]
  node_todo_validation["Request validation"]
  node_todo_schemas["Todo schemas<br/>[todo.schema.js]"]
  node_todo_handlers["Todo handlers"]
  node_todo_model["Todo model<br/>[todo.model.js]"]
  node_todo_db[("Mongo connection<br/>[db.js]")]
end

subgraph group_auth["Auth API"]
  node_auth_entry["Auth app<br/>[app.js]"]
  node_auth_routes["Auth routes<br/>[auth.route.js]"]
  node_course_routes["Course routes<br/>[course.route.js]"]
  node_profile_routes["Profile routes<br/>[profile.route.js]"]
  node_auth_validate["Schema validation<br/>[validate.schema.js]"]
  node_auth_guard["Protected route check"]
  node_auth_handlers["Signup and login<br/>[auth.js]"]
  node_user_shape["User input shapes<br/>[userShape.js]"]
  node_user_model[("User model<br/>[user.model.js]")]
end

subgraph group_frontend["React demos"]
  node_react_app["Course storefront app<br/>[App.tsx]"]
  node_course_selling["Course selling view<br/>[CourseSelling.tsx]"]
  node_react_basics["Course card app<br/>[App.tsx]"]
  node_course_card["Course card<br/>[CourseCard.tsx]"]
  node_api_tester["API tester demos<br/>[APITester.tsx]"]
end

subgraph group_kalshi["Kalshi project"]
  node_kalshi_entry["Kalshi project entry<br/>[index.js]"]
  node_kalshi_market["Market workflow<br/>[market.js]"]
  node_kalshi_resolve["Market resolution<br/>[resolve.js]"]
  node_kalshi_bet[("Bet records<br/>[bet.js]")]
  node_kalshi_market_model[("Market records<br/>[market.js]")]
  node_kalshi_wallet[("Wallet events<br/>[walletEvents.js]")]
end

node_learner(("Learner / API client"))

node_learner -.->|"runs examples"| node_async
node_learner -.->|"sends requests"| node_fundamentals
node_learner -.->|"sends requests"| node_notes
node_learner -.->|"sends requests"| node_todo_entry
node_learner -.->|"sends requests"| node_auth_entry
node_learner -.->|"views"| node_react_app
node_learner -.->|"views"| node_react_basics
node_learner -.->|"uses project"| node_kalshi_entry
node_todo_entry -->|"mounts"| node_todo_routes
node_todo_entry -->|"connects"| node_todo_db
node_todo_routes -->|"dispatches"| node_todo_handlers
node_todo_routes -->|"validates with"| node_todo_validation
node_todo_validation -.->|"uses schemas"| node_todo_schemas
node_todo_handlers -->|"reads and writes"| node_todo_model
node_auth_entry -->|"mounts"| node_auth_routes
node_auth_entry -->|"mounts"| node_course_routes
node_auth_entry -->|"mounts"| node_profile_routes
node_auth_routes -->|"validates with"| node_auth_validate
node_auth_routes -->|"uses shapes"| node_user_shape
node_auth_routes -->|"dispatches"| node_auth_handlers
node_auth_handlers -->|"imports validator"| node_auth_validate
node_auth_handlers -->|"reads and writes"| node_user_model
node_course_routes -->|"checks access"| node_auth_guard
node_course_routes -->|"queries user"| node_user_model
node_profile_routes -->|"checks access"| node_auth_guard
node_auth_guard -->|"loads user"| node_user_model
node_react_app -->|"renders"| node_course_selling
node_react_basics -->|"renders"| node_course_card
node_kalshi_entry -.->|"dispatches"| node_kalshi_market
node_kalshi_market -.->|"uses records"| node_kalshi_market_model
node_kalshi_market -.->|"uses bets"| node_kalshi_bet
node_kalshi_resolve -.->|"records events"| node_kalshi_wallet

click node_async "https://github.com/pritam-swe/100xdevs-wintercamp/tree/main/class-1-async-js"
click node_fundamentals "https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/class-2-backend-fundamentals-22-oct/index.js"
click node_notes "https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/notes-app-backend/server.js"
click node_todo_entry "https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/todo-backend/src/index.js"
click node_todo_routes "https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/todo-backend/src/routes/todo.route.js"
click node_todo_validation "https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/todo-backend/src/middlewares/validation.middleware.js"
click node_todo_schemas "https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/todo-backend/src/schemas/todo.schema.js"
click node_todo_handlers "https://github.com/pritam-swe/100xdevs-wintercamp/tree/main/todo-backend/src/controllers"
click node_todo_model "https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/todo-backend/src/models/todo.model.js"
click node_todo_db "https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/todo-backend/src/db.js"
click node_auth_entry "https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/class-2.5-auth-25th-oct-extra/src/app.js"
click node_auth_routes "https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/class-2.5-auth-25th-oct-extra/src/routes/auth.route.js"
click node_course_routes "https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/class-2.5-auth-25th-oct-extra/src/routes/course.route.js"
click node_profile_routes "https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/class-2.5-auth-25th-oct-extra/src/routes/profile.route.js"
click node_auth_validate "https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/class-2.5-auth-25th-oct-extra/src/middlewares/validate.schema.js"
click node_auth_guard "https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/class-2.5-auth-25th-oct-extra/src/middlewares/protectedRoute.check.js"
click node_auth_handlers "https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/class-2.5-auth-25th-oct-extra/src/controllers/auth.js"
click node_user_shape "https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/class-2.5-auth-25th-oct-extra/src/types/userShape.js"
click node_user_model "https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/class-2.5-auth-25th-oct-extra/src/models/user.model.js"
click node_react_app "https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/week-3-class-1-react-3rd-nov/class-2/src/App.tsx"
click node_course_selling "https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/week-3-class-1-react-3rd-nov/class-2/src/components/CourseSelling.tsx"
click node_react_basics "https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/week-3-class-1-react-3rd-nov/react-basics/src/App.tsx"
click node_course_card "https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/week-3-class-1-react-3rd-nov/react-basics/src/CourseCard.tsx"
click node_api_tester "https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/week-3-class-1-react-3rd-nov/class-2/src/APITester.tsx"
click node_kalshi_entry "https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/class-4-27th-Oct/mini-kalshi/src/index.js"
click node_kalshi_market "https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/class-4-27th-Oct/mini-kalshi/src/controller/market.js"
click node_kalshi_resolve "https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/class-4-27th-Oct/mini-kalshi/src/controller/resolve.js"
click node_kalshi_bet "https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/class-4-27th-Oct/mini-kalshi/src/model/bet.js"
click node_kalshi_market_model "https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/class-4-27th-Oct/mini-kalshi/src/model/market.js"
click node_kalshi_wallet "https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/class-4-27th-Oct/mini-kalshi/src/model/walletEvents.js"

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_async,node_learner toneBlue
class node_fundamentals,node_notes toneAmber
class node_todo_entry,node_todo_routes,node_todo_validation,node_todo_schemas,node_todo_handlers,node_todo_model,node_todo_db toneMint
class node_auth_entry,node_auth_routes,node_course_routes,node_profile_routes,node_auth_validate,node_auth_guard,node_auth_handlers,node_user_shape,node_user_model toneRose
class node_react_app,node_course_selling,node_react_basics,node_course_card,node_api_tester toneIndigo
class node_kalshi_entry,node_kalshi_market,node_kalshi_resolve,node_kalshi_bet,node_kalshi_market_model,node_kalshi_wallet toneTeal
```

## Components

### Language exercises

- [Async exercises](https://github.com/pritam-swe/100xdevs-wintercamp/tree/main/class-1-async-js): `class-1-async-js`

### Backend demos

- [Express fundamentals](https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/class-2-backend-fundamentals-22-oct/index.js): `class-2-backend-fundamentals-22-oct/index.js`
- [Notes backend](https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/notes-app-backend/server.js): `notes-app-backend/server.js`

### Todo API

- [Todo server](https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/todo-backend/src/index.js): `todo-backend/src/index.js`
- [Todo routes](https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/todo-backend/src/routes/todo.route.js): `todo-backend/src/routes/todo.route.js`
- [Request validation](https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/todo-backend/src/middlewares/validation.middleware.js): `todo-backend/src/middlewares/validation.middleware.js`
- [Todo schemas](https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/todo-backend/src/schemas/todo.schema.js): `todo-backend/src/schemas/todo.schema.js`
- [Todo handlers](https://github.com/pritam-swe/100xdevs-wintercamp/tree/main/todo-backend/src/controllers): `todo-backend/src/controllers`
- [Todo model](https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/todo-backend/src/models/todo.model.js): `todo-backend/src/models/todo.model.js`
- [Mongo connection](https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/todo-backend/src/db.js): `todo-backend/src/db.js`

### Auth API

- [Auth app](https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/class-2.5-auth-25th-oct-extra/src/app.js): `class-2.5-auth-25th-oct-extra/src/app.js`
- [Auth routes](https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/class-2.5-auth-25th-oct-extra/src/routes/auth.route.js): `class-2.5-auth-25th-oct-extra/src/routes/auth.route.js`
- [Course routes](https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/class-2.5-auth-25th-oct-extra/src/routes/course.route.js): `class-2.5-auth-25th-oct-extra/src/routes/course.route.js`
- [Profile routes](https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/class-2.5-auth-25th-oct-extra/src/routes/profile.route.js): `class-2.5-auth-25th-oct-extra/src/routes/profile.route.js`
- [Schema validation](https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/class-2.5-auth-25th-oct-extra/src/middlewares/validate.schema.js): `class-2.5-auth-25th-oct-extra/src/middlewares/validate.schema.js`
- [Protected route check](https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/class-2.5-auth-25th-oct-extra/src/middlewares/protectedRoute.check.js): `class-2.5-auth-25th-oct-extra/src/middlewares/protectedRoute.check.js`
- [Signup and login](https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/class-2.5-auth-25th-oct-extra/src/controllers/auth.js): `class-2.5-auth-25th-oct-extra/src/controllers/auth.js`
- [User input shapes](https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/class-2.5-auth-25th-oct-extra/src/types/userShape.js): `class-2.5-auth-25th-oct-extra/src/types/userShape.js`
- [User model](https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/class-2.5-auth-25th-oct-extra/src/models/user.model.js): `class-2.5-auth-25th-oct-extra/src/models/user.model.js`

### React demos

- [Course storefront app](https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/week-3-class-1-react-3rd-nov/class-2/src/App.tsx): `week-3-class-1-react-3rd-nov/class-2/src/App.tsx`
- [Course selling view](https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/week-3-class-1-react-3rd-nov/class-2/src/components/CourseSelling.tsx): `week-3-class-1-react-3rd-nov/class-2/src/components/CourseSelling.tsx`
- [Course card app](https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/week-3-class-1-react-3rd-nov/react-basics/src/App.tsx): `week-3-class-1-react-3rd-nov/react-basics/src/App.tsx`
- [Course card](https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/week-3-class-1-react-3rd-nov/react-basics/src/CourseCard.tsx): `week-3-class-1-react-3rd-nov/react-basics/src/CourseCard.tsx`
- [API tester demos](https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/week-3-class-1-react-3rd-nov/class-2/src/APITester.tsx): `week-3-class-1-react-3rd-nov/class-2/src/APITester.tsx`

### Kalshi project

- [Kalshi project entry](https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/class-4-27th-Oct/mini-kalshi/src/index.js): `class-4-27th-Oct/mini-kalshi/src/index.js`
- [Market workflow](https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/class-4-27th-Oct/mini-kalshi/src/controller/market.js): `class-4-27th-Oct/mini-kalshi/src/controller/market.js`
- [Market resolution](https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/class-4-27th-Oct/mini-kalshi/src/controller/resolve.js): `class-4-27th-Oct/mini-kalshi/src/controller/resolve.js`
- [Bet records](https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/class-4-27th-Oct/mini-kalshi/src/model/bet.js): `class-4-27th-Oct/mini-kalshi/src/model/bet.js`
- [Market records](https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/class-4-27th-Oct/mini-kalshi/src/model/market.js): `class-4-27th-Oct/mini-kalshi/src/model/market.js`
- [Wallet events](https://github.com/pritam-swe/100xdevs-wintercamp/blob/main/class-4-27th-Oct/mini-kalshi/src/model/walletEvents.js): `class-4-27th-Oct/mini-kalshi/src/model/walletEvents.js`

### Other components

- **Learner / API client**

## Connections

- Learner / API client → Async exercises: runs examples
- Learner / API client → Express fundamentals: sends requests
- Learner / API client → Notes backend: sends requests
- Learner / API client → Todo server: sends requests
- Learner / API client → Auth app: sends requests
- Learner / API client → Course storefront app: views
- Learner / API client → Course card app: views
- Learner / API client → Kalshi project entry: uses project
- Todo server → Todo routes: mounts (evidence: `todo-backend/src/index.js`)
- Todo server → Mongo connection: connects (evidence: `todo-backend/src/index.js`)
- Todo routes → Todo handlers: dispatches (evidence: `todo-backend/src/routes/todo.route.js`)
- Todo routes → Request validation: validates with (evidence: `todo-backend/src/routes/todo.route.js`)
- Request validation → Todo schemas: uses schemas
- Todo handlers → Todo model: reads and writes (evidence: `todo-backend/src/controllers/getTodoHandlers.js`)
- Auth app → Auth routes: mounts (evidence: `class-2.5-auth-25th-oct-extra/src/app.js`)
- Auth app → Course routes: mounts (evidence: `class-2.5-auth-25th-oct-extra/src/app.js`)
- Auth app → Profile routes: mounts (evidence: `class-2.5-auth-25th-oct-extra/src/app.js`)
- Auth routes → Schema validation: validates with (evidence: `class-2.5-auth-25th-oct-extra/src/routes/auth.route.js`)
- Auth routes → User input shapes: uses shapes (evidence: `class-2.5-auth-25th-oct-extra/src/routes/auth.route.js`)
- Auth routes → Signup and login: dispatches (evidence: `class-2.5-auth-25th-oct-extra/src/routes/auth.route.js`)
- Signup and login → Schema validation: imports validator (evidence: `class-2.5-auth-25th-oct-extra/src/controllers/auth.js`)
- Signup and login → User model: reads and writes (evidence: `class-2.5-auth-25th-oct-extra/src/controllers/auth.js`)
- Course routes → Protected route check: checks access (evidence: `class-2.5-auth-25th-oct-extra/src/routes/course.route.js`)
- Course routes → User model: queries user (evidence: `class-2.5-auth-25th-oct-extra/src/routes/course.route.js`)
- Profile routes → Protected route check: checks access (evidence: `class-2.5-auth-25th-oct-extra/src/routes/profile.route.js`)
- Protected route check → User model: loads user (evidence: `class-2.5-auth-25th-oct-extra/src/middlewares/protectedRoute.check.js`)
- Course storefront app → Course selling view: renders (evidence: `week-3-class-1-react-3rd-nov/class-2/src/App.tsx`)
- Course card app → Course card: renders (evidence: `week-3-class-1-react-3rd-nov/react-basics/src/App.tsx`)
- Kalshi project entry → Market workflow: dispatches
- Market workflow → Market records: uses records
- Market workflow → Bet records: uses bets
- Market resolution → Wallet events: records events