Wallet Framework is a distributed P2P (Peer-to-Peer) money transfer system built with Domain-Driven Design (DDD), CQRS, and Event-Driven Architecture principles, designed for high scalability and resilience.
| Feature | Implementation |
|---|---|
| Microservice Architecture | 4 core services: Transaction, Wallet, Customer, Fraud |
| Distributed Transaction Management | Saga Pattern (Orchestration) via MassTransit State Machine |
| Data Consistency | Outbox/Inbox Pattern with EF Core |
| Centralized Security | YARP Gateway + Keycloak (OIDC/OAuth 2.0) |
| Full Observability | Jaeger (Traces), Prometheus (Metrics), Grafana (Dashboards) |
| Secrets Management | HashiCorp Vault |
| Category | Technology |
|---|---|
| Runtime | .NET 10 |
| ORM | Entity Framework Core 10 |
| Messaging | MassTransit v8.x + RabbitMQ 3.13 |
| CQRS | MediatR v12.x |
| Database | PostgreSQL 16 |
| Cache | Redis 7 |
| Identity | Keycloak |
| Gateway | YARP |
| Secrets | HashiCorp Vault |
| Observability | OpenTelemetry, Jaeger, Prometheus, Grafana |
- Docker Desktop (or Docker Engine + Docker Compose)
- .NET 10 SDK (for local development)
Start all services with a single command:
docker-compose up -dThis will start:
- All microservices (Customer, Wallet, Transaction, Fraud)
- API Gateway
- Infrastructure services (PostgreSQL, RabbitMQ, Redis, Keycloak, Vault)
- Observability stack (Jaeger, Prometheus, Grafana)
Once the services are running, you can access:
| Service | Port | URL |
|---|---|---|
| API Gateway | 5000 | http://localhost:5000 |
| Keycloak | 8080 | http://localhost:8080 |
| RabbitMQ Management UI | 15672 | http://localhost:15672 |
| Jaeger UI | 16686 | http://localhost:16686 |
| Grafana | 3000 | http://localhost:3000 |
| Prometheus | 9090 | http://localhost:9090 |
| PgAdmin | 5050 | http://localhost:5050 |
| Vault UI | 8200 | http://localhost:8200 |
Default Credentials:
- RabbitMQ:
user/password - Grafana:
admin/admin - PgAdmin:
admin@example.com/admin - Keycloak:
admin/admin - Vault: Root token
my-root-token(dev mode)
WalletFramework/
├── src/
│ ├── Infrastructure/
│ │ └── WF.ApiGateway/ # YARP API Gateway
│ └── Services/
│ ├── CustomerService/ # Customer management
│ ├── FraudService/ # Fraud detection
│ ├── TransactionService/ # Transaction orchestration
│ └── WalletService/ # Wallet operations
├── shared/
│ ├── WF.Shared.Contracts/ # Shared contracts and DTOs
│ └── WF.Shared.Observability/ # OpenTelemetry configuration
├── tests/ # Unit and integration tests
├── docs/ # Documentation
└── docker-compose.yml # Infrastructure orchestration
For detailed information, please refer to the following documentation:
- Architecture - Architecture decisions, diagrams, DDD, CQRS
- Getting Started - Setup, Docker, Seed Data, First Run
- Services - Microservices overview and responsibilities
- Patterns and Practices - Design patterns: Result, Value Objects, Smart Enum, Saga
- Security - Keycloak, Vault, Authentication flows
- Observability - Jaeger, Prometheus, Grafana dashboards
This project follows Clean Architecture principles with strict separation of concerns. Please ensure all code adheres to:
- SOLID principles (especially Single Responsibility and Dependency Inversion)
- C# 12+ language features (global using, file-scoped namespaces, primary constructors)
- Async/await for I/O-bound operations
- Structured logging with message templates (no string interpolation in logs)
- Domain-Driven Design patterns
MIT License