🎓Advanced Smart Functions

Advanced Understanding of Smart Functions in the Interesting Network with Lattica

In the Interesting Network, powered by a fork of FlureeDB and integrated with Lattica, smart functions play a pivotal role in managing and manipulating data. These functions, scripted in FlureeQL, offer a wide range of capabilities, from validating transactions to automating complex workflows. This guide delves deeper into the practical applications of these smart functions, providing examples of their code and potential use cases.

Smart Functions in Action: Code Examples and Use Cases

1. Transaction Validation

• Use Case: Ensuring that only users with sufficient credits can initiate a transaction.

• Smart Function Example:

  (defn validate-transaction
    "Validates if the user has sufficient credits for the transaction."
    [transaction db]
    (let [user-credits (-> (query db `{:select [:credits]
                                      :from [:user]
                                      :where [:= :id (:userId transaction)]})
                           first
                           :credits)]
      (when (< user-credits (:amount transaction))
        (throw (Exception. "Insufficient credits")))))
  

• Capability: This function queries the user's credit balance and compares it with the transaction amount, preventing transactions that exceed the user's available credits.

2. Automated Data Updates

• Use Case: Automatically updating a user's status based on activity metrics.

• Smart Function Example:

  (defn update-user-status
    "Updates user status based on their activity."
    [user-id db]
    (let [activity (-> (query db `{:select [:activity]
                                   :from [:userActivity]
                                   :where [:= :userId user-id]})
                       first
                       :activity)]
      (when (> activity threshold)
        (update db `{:update :user
                     :set {:status "active"}
                     :where [:= :id user-id]}))))
  

• Capability: This function assesses user activity and updates their status accordingly, demonstrating how smart functions can automate routine data management tasks.

3. Complex Business Logic Enforcement

• Use Case: Enforcing multi-tiered access control for sensitive data.

• Smart Function Example:

  (defn access-control-check
    "Checks access control based on user role and data classification."
    [user-id data-id db]
    (let [user-role (-> (query db `{:select [:role]
                                    :from [:user]
                                    :where [:= :id user-id]})
                        first
                        :role)
          data-classification (-> (query db `{:select [:classification]
                                             :from [:data]
                                             :where [:= :id data-id]})
                                  first
                                  :classification)]
      (when-not (is-authorized user-role data-classification)
        (throw (Exception. "Access Denied")))))

• Capability: This function cross-references user roles with data classifications to enforce sophisticated access control policies.

Leveraging Lattica for Enhanced Capabilities

With Lattica, the capabilities of smart functions in the Interesting Network are significantly enhanced, especially in the realm of distributed computing and actor model concurrency. Lattica, being wasm native, brings in powerful features:

1. Distributed Actor Model: Smart functions can be designed as actors in a distributed system, allowing for scalable and resilient data processing.

2. Portable Capabilities: Lattica's approach to capability contracts enables smart functions to interact with a variety of external services and resources seamlessly.

3. Efficient Resource Utilization: Leveraging WebAssembly, Lattica ensures that smart functions are lightweight and efficient, suitable for edge computing scenarios.

Potential Use Cases with Lattica Integration

• Real-Time Data Processing: Utilize Lattica's distributed actor model to process data in real-time, ideal for applications requiring immediate data manipulation or decision-making.

• IoT Data Management: Handle vast streams of IoT data efficiently, applying smart functions for on-the-fly analysis and response.

• Decentralized Applications (DApps): Create robust DApps where smart functions handle complex interactions between different blockchain components and external services.

By combining the power of FlureeDB's smart functions with Lattica's advanced capabilities, the Interesting Network offers you a versatile and powerful platform for managing complex data workflows and business logic. This integration paves the way for innovative applications that require high performance, scalability, and sophisticated data manipulation.