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SYSTEM_ARCHITECTURE.md
CeloHT is a modular Web3 ecosystem built on the Celo blockchain. Its system architecture separates the user-facing applications, blockchain infrastructure, wallet interactions, backend services, data systems, and community-oriented services into distinct layers.
┌──────────────────────┐
│ USERS │
│ Individuals • Agents │
│ Communities • Partners│
└──────────┬───────────┘
│
▼
┌──────────────────────────┐
│ CELOHT FRONTEND │
│ Website • dApp • Portals │
└────────────┬─────────────┘
│
┌─────────────┼─────────────┐
│ │ │
▼ ▼ ▼
Wallet Layer API Layer Content Layer
│ │ │
▼ ▼ ▼
Valora Backend/API Education
│ │ Resources
│ │
└──────┬──────┘
▼
┌─────────────────────┐
│ CELO NETWORK │
│ │
│ CELO • cUSD • │
│ Smart Contracts │
└──────────┬──────────┘
│
┌─────────────┼──────────────┐
▼ ▼ ▼
Payments Contracts Events
│ │ │
└─────────────┼──────────────┘
▼
┌───────────────┐
│ Impact / Data │
│ & Reporting │
└───────────────┘
The system is divided into the following layers:
- Presentation Layer
- Application Layer
- Integration Layer
- Wallet Layer
- Blockchain Layer
- Data & Analytics Layer
- Governance & Security Layer
The presentation layer contains interfaces through which users interact with CeloHT.
Examples include:
- CeloHT website
- CeloHT dApp
- Agent interfaces
- Education interfaces
- Community dashboards
- Partner interfaces
The presentation layer should not directly manage private keys or sensitive blockchain credentials.
The application layer contains business logic and application workflows.
Responsibilities may include:
- User onboarding
- Educational content
- Agent workflows
- Payment initiation
- Transaction status
- Community services
- Impact reporting
- Public information
Business logic should remain separated from presentation components wherever possible.
The integration layer connects CeloHT applications to external infrastructure.
Potential integrations include:
- Celo RPC infrastructure
- Blockchain explorers
- Wallet providers
- APIs
- Analytics services
- Hosting infrastructure
The integration layer should isolate third-party dependencies so that an external provider can be replaced without rewriting the entire application.
Wallets provide transaction authorization.
Primary interaction:
User
│
▼
CeloHT Application
│
▼
Wallet
│
▼
Transaction Signature
│
▼
Celo Network
The application must never request or store:
- Seed phrases
- Private keys
- Wallet recovery phrases
The blockchain layer is provided by Celo.
It can support:
- CELO transactions
- cUSD transactions
- Smart contracts
- Contract events
- Wallet addresses
- On-chain verification
Blockchain transactions should be treated as externally verifiable records.
Where smart contracts are used, the application communicates with deployed contracts through wallet-signed transactions.
Frontend
│
▼
Contract Interface
│
▼
Wallet Signature
│
▼
Smart Contract
│
▼
Celo Blockchain
Contracts should have:
- Documented addresses
- Verified source code where possible
- Defined permissions
- Tests
- Events
- Security documentation
CeloHT may operate with both on-chain and off-chain information.
- Transaction hashes
- Wallet addresses
- Contract events
- Token balances
- Smart-contract state
- Educational records
- Application configuration
- Community program information
- Public resources
- Operational data
Sensitive data should not be unnecessarily stored on-chain.
The Agent System connects local communities with blockchain-enabled services.
CeloHT Platform
│
▼
Agent Interface
│
┌─────────┼─────────┐
▼ ▼ ▼
Agent A Agent B Agent C
│ │ │
▼ ▼ ▼
Community Community Community
Agents may support:
- User onboarding
- Wallet education
- Cash-in
- Cash-out
- Transfers
- Community support
Agent operations must follow documented operational and security policies.
Education is integrated into the system rather than treated as a separate marketing function.
Education
│
▼
User Understanding
│
▼
Wallet Adoption
│
▼
Responsible Usage
│
▼
Community Participation
The education system can cover blockchain, financial literacy, wallets, Celo, cUSD, digital security, and responsible Web3 participation.
The environmental component connects CeloHT's digital ecosystem with physical community impact.
CeloHT Community
│
▼
Environmental Program
│
▼
Tree Planting
│
▼
Community Verification
│
▼
Impact Records
Potential metrics include:
- Trees planted
- Communities involved
- Participants
- Seedlings distributed
- Environmental activities
Security is applied across every layer.
User Security
↓
Wallet Security
↓
Application Security
↓
API Security
↓
Smart Contract Security
↓
Blockchain Security
Core principles:
- Least privilege
- Secure secrets management
- Dependency monitoring
- Code review
- Automated testing
- CI security checks
- Wallet safety
- Contract verification
A production deployment can conceptually follow:
Developer
│
▼
GitHub Repository
│
▼
CI/CD Pipeline
│
├── Lint
├── Test
├── Build
└── Security Checks
│
▼
Deployment Platform
│
▼
CeloHT Application
│
├── Frontend
├── APIs
└── Services
CeloHT software should distinguish between:
- Local development
- Testing
- Staging
- Production
Production credentials must never be committed to source control.
Environment variables should be managed securely.
Production systems should provide sufficient visibility to identify:
- Application failures
- API failures
- Transaction failures
- Contract errors
- Performance problems
- Security events
Blockchain transactions should additionally be traceable through their transaction hashes.
The architecture is designed to scale horizontally.
Potential scaling paths include:
- Multiple frontend applications
- Independent backend services
- Additional agent interfaces
- Additional communities
- More educational content
- More blockchain integrations
The system should avoid unnecessary coupling between independent components.
CeloHT system development should follow:
- Security first
- Modular architecture
- Minimal unnecessary dependencies
- Transparent financial flows
- Publicly verifiable blockchain activity
- Clear separation of concerns
- Reproducible deployments
- Open documentation
- Community accessibility
- Measurable impact
Document: System Architecture Version: 1.0 Project: CeloHT Blockchain: Celo Architecture: Modular Web3 System
© 2026 CeloHT - Open Source. Global Impact. Licensed under Apache.