Should the logic for creating an account and transferring be separated into different services?

Splitting the logic of account creation and transfer into different services is usually justified from a microservices architecture perspective:

• Responsibility isolation: each service is responsible for its own business logic, which simplifies support and development.
• Scalability: services can be scaled independently depending on the load.
• Resilience: a failure in one service does not lead to a complete system shutdown.

However, it is important to consider the complexity of interaction between services, the need for reliable communication (e.g., through message queues or REST API), and transaction management.

Example:

// Account creation service
func CreateAccount(userID string) (Account, error) {
    // account creation logic
}

// Transfer service
func Transfer(fromAccountID, toAccountID string, amount float64) error {
    // fund transfer logic
}

Thus, separation improves system modularity and manageability but requires thoughtful interaction design.