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CeloHT edited this page Aug 10, 2026 · 1 revision

CeloHT Development Architecture

Version: 1.0 Project: CeloHT Architecture Type: Modular Web3 Application Ecosystem Blockchain: Celo

1. Purpose

This document defines the development architecture used to build, test, maintain, and extend the CeloHT ecosystem.

CeloHT is developed as a modular system where frontend applications, backend services, blockchain integrations, smart contracts, documentation, and community-impact systems can evolve independently while maintaining interoperability.

2. Development Architecture Overview

                         DEVELOPER
                            │
                            ▼
                    ┌───────────────┐
                    │    GITHUB     │
                    │ Repositories  │
                    └───────┬───────┘
                            │
                            ▼
                    ┌───────────────┐
                    │ CODE REVIEW   │
                    │ Pull Requests │
                    └───────┬───────┘
                            │
                            ▼
                    ┌───────────────┐
                    │ CI PIPELINE   │
                    │               │
                    │ Lint          │
                    │ Test          │
                    │ Build         │
                    │ Security      │
                    └───────┬───────┘
                            │
              ┌─────────────┼─────────────┐
              ▼             ▼             ▼
          Frontend       Backend       Contracts
              │             │             │
              └─────────────┼─────────────┘
                            ▼
                     INTEGRATION TESTS
                            │
                            ▼
                         DEPLOYMENT

3. Development Principles

CeloHT development follows these principles:

  1. Open-source by default where appropriate.
  2. Small and reviewable changes.
  3. Security before convenience.
  4. Automated testing.
  5. Reproducible builds.
  6. Clear separation of concerns.
  7. Documentation alongside implementation.
  8. No production secrets in source control.
  9. Blockchain interactions must be explicit and auditable.
  10. Community impact remains a core product requirement.

4. Repository Structure

The CeloHT ecosystem may contain multiple specialized repositories.

Representative repositories include:

Celo-HaiTi/
│
├── celoht-dapp/
├── CeloHT-Platform/
├── CeloHT-ValoraApp/
├── CeloHT-EduAgentForest/
├── celoht-education/
├── celoht-ngo-platform/
├── celoHT-website/
├── celoht-brand/
└── celoht-investor-deck/

Each repository should have a clearly defined responsibility.

5. Application Architecture

A typical CeloHT web application follows:

src/
│
├── app/
├── components/
├── features/
├── lib/
├── hooks/
├── services/
├── types/
├── config/
└── tests/

The exact structure may differ between repositories.

The important architectural rule is separation between:

  • UI
  • Business logic
  • Blockchain integration
  • External services
  • Data access
  • Configuration
  • Tests

6. Frontend Architecture

The frontend is responsible for:

  • User interfaces
  • Navigation
  • Wallet connection
  • Transaction requests
  • Educational content
  • Application state
  • User feedback
  • Error presentation

The frontend should not contain secrets or private credentials.

7. Service Architecture

Application services should isolate business operations from UI components.

Conceptually:

UI
 │
 ▼
Application Service
 │
 ├── Blockchain Service
 ├── API Service
 ├── Data Service
 └── Analytics Service

This allows individual integrations to be replaced without rewriting the user interface.

8. Blockchain Development

Blockchain functionality should be isolated into dedicated modules.

Application
    │
    ▼
Blockchain Service
    │
    ├── Network Configuration
    ├── Wallet Connection
    ├── Contract Interface
    ├── Transaction Builder
    └── Transaction Monitoring

The application should never scatter raw blockchain calls throughout unrelated UI components.

9. Smart Contract Development

Smart-contract development follows:

Specification
     │
     ▼
Implementation
     │
     ▼
Unit Tests
     │
     ▼
Static Analysis
     │
     ▼
Security Review
     │
     ▼
Testnet
     │
     ▼
Integration Tests
     │
     ▼
Production

Contracts should be versioned and associated with a specific deployment record.

10. Environment Management

CeloHT should distinguish:

Development
     │
     ▼
Testing
     │
     ▼
Staging
     │
     ▼
Production

Each environment should have its own:

  • Configuration
  • RPC endpoints where appropriate
  • Database credentials
  • API credentials
  • Deployment configuration

Production credentials must never be committed to GitHub.

11. Environment Variables

Sensitive configuration should be provided through environment variables.

Examples:

DATABASE_URL
RPC_URL
NEXT_PUBLIC_NETWORK
CONTRACT_ADDRESS
API_KEY

Public configuration and secrets must be clearly distinguished.

A secret must never be exposed through a client-side environment variable.

12. Git Workflow

Recommended workflow:

main
 │
 ├── feature/*
 ├── fix/*
 ├── docs/*
 └── security/*

Typical contribution flow:

Create Branch
     │
     ▼
Implement Change
     │
     ▼
Run Tests
     │
     ▼
Commit
     │
     ▼
Push
     │
     ▼
Pull Request
     │
     ▼
CI
     │
     ▼
Code Review
     │
     ▼
Merge

13. Commit Standards

Commits should describe the actual change.

Examples:

feat: add wallet connection flow
fix: handle failed transaction state
docs: update architecture documentation
test: add payment integration tests
security: improve contract access control
refactor: isolate blockchain service

14. Pull Requests

Pull requests should contain:

  • Clear title
  • Description
  • Reason for the change
  • Testing performed
  • Screenshots for UI changes
  • Security considerations where relevant
  • Breaking changes where applicable

Large unrelated changes should be split into separate pull requests.

15. Continuous Integration

CI should automatically perform appropriate checks.

Pull Request
     │
     ▼
GitHub Actions
     │
 ┌───┼──────────────┐
 ▼   ▼              ▼
Lint Tests       Security
 │    │              │
 └────┼──────────────┘
      ▼
    Build
      │
      ▼
  PR Status

Recommended checks include:

  • Dependency installation
  • Linting
  • Formatting
  • Unit tests
  • Integration tests
  • Production build
  • Dependency auditing
  • Code security analysis

16. Testing Architecture

Testing should exist at multiple levels.

Unit Tests

Test individual functions and components.

Integration Tests

Test interactions between components.

Blockchain Tests

Test contract interactions and transaction flows.

End-to-End Tests

Test complete user workflows.

Unit
 ↓
Integration
 ↓
Blockchain
 ↓
End-to-End
 ↓
Production Verification

17. Dependency Management

Dependencies should be:

  • Explicitly declared
  • Regularly updated
  • Audited for vulnerabilities
  • Removed when unnecessary

Automated dependency monitoring should be enabled where practical.

18. Code Quality

Projects should use consistent:

  • Formatting
  • Linting
  • Type checking
  • Naming conventions
  • Error handling
  • Documentation practices

For TypeScript applications, strict typing should be preferred where practical.

19. Error Handling

Errors should be handled at the appropriate layer.

Blockchain Error
      │
      ▼
Service Layer
      │
      ▼
Application State
      │
      ▼
User-Friendly Message

Raw internal errors should not unnecessarily expose sensitive infrastructure information to users.

20. Logging

Logs should help developers diagnose:

  • Failed API requests
  • Failed transactions
  • Application errors
  • Deployment problems
  • Authentication problems
  • Integration failures

Sensitive credentials and private user information must never be logged.

21. Security Development Lifecycle

Security should be integrated from the beginning.

Design
 │
 ▼
Threat Modeling
 │
 ▼
Implementation
 │
 ▼
Automated Security Checks
 │
 ▼
Code Review
 │
 ▼
Testing
 │
 ▼
Deployment
 │
 ▼
Monitoring

22. Documentation Requirements

Every significant component should document:

  • Purpose
  • Inputs
  • Outputs
  • Dependencies
  • Configuration
  • Security considerations
  • Deployment requirements
  • Known limitations

23. Development Checklist

Before merging production code:

  • Code compiles
  • Tests pass
  • Lint passes
  • Type checks pass
  • Build succeeds
  • No secrets committed
  • Dependencies reviewed
  • Security implications reviewed
  • Documentation updated
  • Pull request reviewed

24. Long-Term Development Model

CeloHT development should evolve incrementally:

Prototype
   │
   ▼
Validation
   │
   ▼
Production
   │
   ▼
Monitoring
   │
   ▼
Optimization
   │
   ▼
Scale

The architecture should allow new applications and services to be introduced without destabilizing existing components.

Status

Document: Development Architecture Version: 1.0 Project: CeloHT Primary Development Platform: GitHub Blockchain: Celo

© 2026 CeloHT - Open Source. Global Impact. Licensed under Apache.

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