set up docs

Author: chiscookeke11

documentation/ARCHITECTURE_DOCUMENTATION.md

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-  <a href="https://github.com/othneildrew/Best-README-Template">
-    <img src="https://avatars.githubusercontent.com/u/193694759?s=200&v=4" alt="Logo" width="80" height="80">
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-</div>
-
-
-# DefiFundr Architecture Documentation
-
-## Overview
-DefiFundr is a decentralized payroll and invoice management system built on the Starknet blockchain. The architecture is designed to be modular, scalable, and secure, ensuring seamless interaction between the frontend, backend, and blockchain components.
-
----
-
-## Architecture Diagram
-
-Below is a high-level architecture diagram of the DefiFundr system:
-
-![DefiFundr Architecture Diagram](https://github.com/chiscookeke11/defifundr_backend--fork--/blob/main/documentation/images/DefiFundr%20Architecture%20Documentation%20-%20visual%20selection.png?raw=true)
-
-
----
-
-## System Components
-
-### 1. **Frontend (Mobile & Web)**
-   - **Technologies**: React.js, Next.js, TailwindCSS, Dart.
-   - **Description**:
-     - The frontend provides a user-friendly interface for interacting with the DefiFundr system.
-     - Users can create campaigns, manage payrolls, and view invoices.
-   - **Key Features**:
-     - Responsive design for mobile and web.
-     - Integration with backend APIs and blockchain.
-
-### 2. **Backend (API Server)**
-   - **Technologies**: Go (Golang), Node.js, Express.js.
-   - **Description**:
-     - The backend handles business logic, data processing, and communication with the blockchain.
-     - It exposes RESTful APIs for the frontend to interact with.
-   - **Key Features**:
-     - User authentication and authorization.
-     - Campaign management (creation, donation, withdrawal).
-     - Integration with Ethereum blockchain.
-
-### 3. **Blockchain (Smart Contracts)**
-   - **Technologies**: Cairo.
-   - **Description**:
-     - Smart contracts handle decentralized logic for payroll and invoice management.
-     - They ensure transparency, security, and immutability of transactions.
-   - **Key Features**:
-     - Campaign creation and funding.
-     - Fund disbursement upon successful campaigns.
-     - Refund mechanism for unsuccessful campaigns.
-
-### 4. **Database**
-   - **Technologies**: PostgreSQL, MongoDB.
-   - **Description**:
-     - The database stores user data, campaign details, and transaction history.
-   - **Key Features**:
-     - Relational database for structured data (PostgreSQL).
-     - NoSQL database for flexible data storage (MongoDB).
-
-### 5. **Authentication Service**
-   - **Technologies**: OAuth 2.0, JWT (JSON Web Tokens).
-   - **Description**:
-     - Handles user authentication and authorization.
-   - **Key Features**:
-     - Secure login and session management.
-     - Integration with third-party authentication providers (e.g., Google, MetaMask).
-
-### 6. **Storage (IPFS)**
-   - **Technologies**: IPFS (InterPlanetary File System).
-   - **Description**:
-     - Stores large files (e.g., campaign images, documents) in a decentralized manner.
-   - **Key Features**:
-     - Decentralized and distributed file storage.
-     - Immutable file references.
-
----
-
-## Data Flow
-
-1. **User Interaction**:
-   - Users interact with the frontend (mobile or web) to create campaigns, donate, or manage payrolls.
-
-2. **API Requests**:
-   - The frontend sends API requests to the backend for processing.
-
-3. **Business Logic**:
-   - The backend processes the requests, interacts with the database, and communicates with the blockchain.
-
-4. **Blockchain Interaction**:
-   - The backend sends transactions to the Ethereum blockchain via smart contracts.
-
-5. **Data Storage**:
-   - User data and campaign details are stored in the database.
-   - Large files are stored on IPFS.
-
-6. **Response**:
-   - The backend sends a response back to the frontend, which updates the UI accordingly.
-   
-![Frontend Architecture Diagram](https://github.com/chiscookeke11/defifundr_backend--fork--/blob/main/documentation/images/dataflow.png?raw=true)
----
-
-## Detailed Component Diagrams
-
-### 1. **Frontend Architecture**
-
-
-- **Components**:
-  - **UI Layer**: React.js (Web), Dart (Mobile).
-  - **State Management**: Redux (Web), Provider (Mobile).
-  - **API Layer**: Axios (Web), Dio (Mobile).
-
-### 2. **Backend Architecture**
-
-
-- **Components**:
-  - **API Layer**: RESTful APIs built with Go/Node.js.
-  - **Service Layer**: Handles business logic (e.g., campaign management, user authentication).
-  - **Data Layer**: PostgreSQL (relational data), MongoDB (NoSQL data).
-
-### 3. **Blockchain Architecture**
-- **Components**:
-  - **Smart Contracts**: Written in Solidity.
-  - **Ethereum Network**: Mainnet or Testnet (e.g., Sepolia).
-  - **Web3.js/Ethers.js**: Libraries for interacting with the blockchain.
-
----
-
-## Security Considerations
-
-1. **Authentication**:
-   - Use OAuth 2.0 and JWT for secure user authentication.
-   - Integrate MetaMask for blockchain-based authentication.
-
-2. **Data Encryption**:
-   - Encrypt sensitive data (e.g., user credentials) in transit and at rest.
-
-3. **Smart Contract Security**:
-   - Perform thorough testing and auditing of smart contracts.
-   - Use tools like Slither or MythX for vulnerability detection.
-
-4. **Access Control**:
-   - Implement role-based access control (RBAC) for backend APIs.
-
----
-
-## Deployment Architecture
-
-### 1. **Frontend**:
-   - Hosted on platforms like Vercel (Web) or Firebase (Mobile).
-
-### 2. **Backend**:
-   - Deployed on cloud platforms like AWS, Google Cloud, or Heroku.
-
-### 3. **Blockchain**:
-   - Smart contracts deployed on the Ethereum mainnet or testnet.
-
-### 4. **Database**:
-   - Managed databases like AWS RDS (PostgreSQL) or MongoDB Atlas.
-
-### 5. **Storage**:
-   - IPFS for decentralized file storage.
-
-   
-
-   ![Blockchain Architecture Diagram](https://github.com/chiscookeke11/defifundr_backend--fork--/blob/main/documentation/images/deployment-architceture.png?raw=true)
-
----
-
-## Future Enhancements
-
-1. **Scalability**:
-   - Implement sharding or layer-2 solutions (e.g., Polygon) for blockchain scalability.
-
-2. **Interoperability**:
-   - Integrate with other blockchains (e.g., Binance Smart Chain, Solana).
-
-3. **Analytics**:
-   - Add analytics dashboards for campaign performance tracking.
-
-4. **AI/ML**:
-   - Use machine learning for fraud detection and campaign recommendations.
-
----
-
-## Glossary
-
-- **Smart Contract**: Self-executing code deployed on the blockchain.
-- **IPFS**: Decentralized file storage system.
-- **JWT**: JSON Web Token for secure authentication.
-- **Web3.js**: Library for interacting with the Ethereum blockchain.
-
----
-
-This architecture documentation provides a clear and detailed overview of the DefiFundr system. Let me know if you’d like to refine or expand any part of it! 🚀Here’s a comprehensive **Architecture Documentation** for the **DefiFundr** project, complete with diagrams and explanations. This documentation provides a high-level overview of the system architecture, components, and their interactions.
-
----
-
-# DefiFundr Architecture Documentation
-
-## Overview
-DefiFundr is a decentralized payroll and invoice management system built on the Ethereum blockchain. The architecture is designed to be modular, scalable, and secure, ensuring seamless interaction between the frontend, backend, and blockchain components.
-
----
-
-## Architecture Diagram
-
-Below is a high-level architecture diagram of the DefiFundr system:
-
-
-
-
----
-
-## System Components
-
-### 1. **Frontend (Mobile & Web)**
-   - **Technologies**: React.js, Next.js, TailwindCSS, Flutter.
-   - **Description**:
-     - The frontend provides a user-friendly interface for interacting with the DefiFundr system.
-     - Users can create campaigns, manage payrolls, and view invoices.
-   - **Key Features**:
-     - Responsive design for mobile and web.
-     - Integration with backend APIs and blockchain.
-
-### 2. **Backend (API Server)**
-   - **Technologies**: Go (Golang), Node.js, Express.js.
-   - **Description**:
-     - The backend handles business logic, data processing, and communication with the blockchain.
-     - It exposes RESTful APIs for the frontend to interact with.
-   - **Key Features**:
-     - User authentication and authorization.
-     - Campaign management (creation, donation, withdrawal).
-     - Integration with Ethereum blockchain.
-
-### 3. **Blockchain (Smart Contracts)**
-   - **Technologies**: Solidity, Ethereum, Hardhat.
-   - **Description**:
-     - Smart contracts handle decentralized logic for payroll and invoice management.
-     - They ensure transparency, security, and immutability of transactions.
-   - **Key Features**:
-     - Campaign creation and funding.
-     - Fund disbursement upon successful campaigns.
-     - Refund mechanism for unsuccessful campaigns.
-
-### 4. **Database**
-   - **Technologies**: PostgreSQL, MongoDB.
-   - **Description**:
-     - The database stores user data, campaign details, and transaction history.
-   - **Key Features**:
-     - Relational database for structured data (PostgreSQL).
-     - NoSQL database for flexible data storage (MongoDB).
-
-### 5. **Authentication Service**
-   - **Technologies**: OAuth 2.0, JWT (JSON Web Tokens).
-   - **Description**:
-     - Handles user authentication and authorization.
-   - **Key Features**:
-     - Secure login and session management.
-     - Integration with third-party authentication providers (e.g., Google, MetaMask).
-
-### 6. **Storage (IPFS)**
-   - **Technologies**: IPFS (InterPlanetary File System).
-   - **Description**:
-     - Stores large files (e.g., campaign images, documents) in a decentralized manner.
-   - **Key Features**:
-     - Decentralized and distributed file storage.
-     - Immutable file references.
-
----
-
-## Data Flow
-
-1. **User Interaction**:
-   - Users interact with the frontend (mobile or web) to create campaigns, donate, or manage payrolls.
-
-2. **API Requests**:
-   - The frontend sends API requests to the backend for processing.
-
-3. **Business Logic**:
-   - The backend processes the requests, interacts with the database, and communicates with the blockchain.
-
-4. **Blockchain Interaction**:
-   - The backend sends transactions to the Ethereum blockchain via smart contracts.
-
-5. **Data Storage**:
-   - User data and campaign details are stored in the database.
-   - Large files are stored on IPFS.
-
-6. **Response**:
-   - The backend sends a response back to the frontend, which updates the UI accordingly.
-
----
-
-## Detailed Component Diagrams
-
-### 1. **Frontend Architecture**
-
-- **Components**:
-  - **UI Layer**: React.js (Web), Flutter (Mobile).
-  - **State Management**: Redux (Web), Provider (Mobile).
-  - **API Layer**: Axios (Web), Dio (Mobile).
-
-### 2. **Backend Architecture**
-
-- **Components**:
-  - **API Layer**: RESTful APIs built with Go/Node.js.
-  - **Service Layer**: Handles business logic (e.g., campaign management, user authentication).
-  - **Data Layer**: PostgreSQL (relational data), MongoDB (NoSQL data).
-
-### 3. **Blockchain Architecture**
-
-- **Components**:
-  - **Smart Contracts**: Written in Solidity.
-  - **Ethereum Network**: Mainnet or Testnet (e.g., Sepolia).
-  - **Web3.js/Ethers.js**: Libraries for interacting with the blockchain.
-
----
-
-## Security Considerations
-
-1. **Authentication**:
-   - Use OAuth 2.0 and JWT for secure user authentication.
-   - Integrate MetaMask for blockchain-based authentication.
-
-2. **Data Encryption**:
-   - Encrypt sensitive data (e.g., user credentials) in transit and at rest.
-
-3. **Smart Contract Security**:
-   - Perform thorough testing and auditing of smart contracts.
-   - Use tools like Slither or MythX for vulnerability detection.
-
-4. **Access Control**:
-   - Implement role-based access control (RBAC) for backend APIs.
-
----
-
-## Deployment Architecture
-
-### 1. **Frontend**:
-   - Hosted on platforms like Vercel (Web) or Firebase (Mobile).
-
-### 2. **Backend**:
-   - Deployed on cloud platforms like AWS, Google Cloud, or Heroku.
-
-### 3. **Blockchain**:
-   - Smart contracts deployed on the Ethereum mainnet or testnet.
-
-### 4. **Database**:
-   - Managed databases like AWS RDS (PostgreSQL) or MongoDB Atlas.
-
-### 5. **Storage**:
-   - IPFS for decentralized file storage.
-
----
-
-## Future Enhancements
-
-1. **Scalability**:
-   - Implement sharding or layer-2 solutions (e.g., Polygon) for blockchain scalability.
-
-2. **Interoperability**:
-   - Integrate with other blockchains (e.g., Binance Smart Chain, Solana).
-
-3. **Analytics**:
-   - Add analytics dashboards for campaign performance tracking.
-
----
-
-## Glossary
-
-- **Smart Contract**: Self-executing code deployed on the blockchain.
-- **IPFS**: Decentralized file storage system.
-- **JWT**: JSON Web Token for secure authentication.
-- **Web3.js**: Library for interacting with the Ethereum blockchain.