Universal Assistant Protocol - Architecture Diagram

graph LR

subgraph User Identity
    UP[Universal Profile - LSP0]
    subgraph LSP0 Components
        ERC725X
        ERC725Y
        LSP1[UP Universal Receiver Delegate - LSP1]
    end
    UP --> ERC725X
    UP --> ERC725Y
    UP --> LSP1
    KM[Key Manager - LSP6] -->|Manages Access| UP
end

Tokens[Digital Asset Contracts - LSP7/LSP8 or Other Payloads] -->|Send Transactions| UP

UP -->|Delegates to| URDuap[UAP - Universal Receiver Delegate]

URDuap -->|Accesses Configurations from| ERC725Y

URDuap -->|Evaluates| Filters

URDuap -->|Invokes| Assistants

Assistants -->|Modify| Value_and_Data[Value and Data]

Assistants -->|Interact with| ThirdParties[Third Parties, ex: Vault]

URDuap -->|Defaults to| LSP1

%% Style Definitions
classDef uapClass fill:#f9f,stroke:#333,stroke-width:2px;

%% Apply Styles to UAP Components
class URDuap uapClass
class Filters uapClass
class Assistants uapClass

Detailed Component Descriptions and Interactions

1. Universal Profile (UP) - LSP0

Components:

• ERC725X: Allows for executing generic function calls.
• ERC725Y: Provides a key-value data store for arbitrary data.
• Universal Receiver Delegate (LSP1): Handles incoming transactions and messages.

Role:

• Acts as the user's on-chain identity.
• Stores configurations and preferences via the ERC725Y key-value store.
• Delegates transaction handling to the Universal Receiver Delegate.

Interactions:

• Receives transactions from Digital Asset Contracts (LSP7/LSP8).
• Delegates incoming transactions to the URDuap.
• Access controlled by the Key Manager (KM).

2. Key Manager (KM) - LSP6

Role:

• Manages permissions and access control for the UP.

Responsibilities:

• Controls who can modify the UP's data and configurations.
• Ensures only authorized entities can interact with sensitive functions.

Interactions:

• Manages access to the UP.
• Enforces permission checks for actions on ERC725X and ERC725Y.

3. Digital Asset Contracts - LSP7/LSP8

Role:

• Represent fungible (LSP7) and non-fungible (LSP8) tokens within the LUKSO ecosystem.

Interactions:

• Send transactions to the UP.
• Trigger the Universal Receiver Delegate upon asset transfer or interaction.

4. Universal Receiver Delegate for UAP (URDuap)

Role:

• The UAP's implementation of the Universal Receiver Delegate.
• Replaces or extends the default LSP1 delegate in the UP.

Responsibilities:

• Handles incoming transactions based on typeId.
• Accesses user configurations from ERC725Y.
• Retrieves Assistants associated with the typeId.
• For each Assistant, retrieves Filters associated with it.
• Evaluates Filters to determine whether to invoke the Assistant.
• Invokes Assistants that pass the filter evaluation.
• Updates value and data based on Assistant's execution.
• Defaults to standard LSP1 behavior if no configurations are found or no Assistants are invoked.

Interactions:

• Delegated to by UP: UP delegates transaction handling to URDuap.
• Accesses configurations from ERC725Y: Reads user-defined Assistants and Filters.
• Evaluates Filters: Determines eligibility of Assistants.
• Invokes Assistants: Calls the execute function of eligible Assistants.
• Updates Value and Data: Modifies transaction data based on Assistants' output.
• Defaults to LSP1: Falls back to default behavior if no actions match.

5. ERC725Y Data Store

Role:

• Provides a key-value storage mechanism for the UP.

Responsibilities:

• Stores configurations, including mappings from typeId to Assistants.
• Stores Filters associated with each Assistant.
• Accessible by URDuap to retrieve necessary data.

Interactions:

• Accessed by URDuap for configurations.
• Manages mappings such as:
  • UAPTypeConfig:<typeId> → AssistantAddresses[]
  • UAPAssistantFilters:<assistantAddress> → FilterData[]
• Managed through ERC725Y interface with access control via KM.

6. Filters

Role:

• Define criteria to evaluate whether an Assistant should be invoked.

Responsibilities:

• Each Filter is associated with an Assistant.
• Contains:
  • filterLogicAddress: Address of the contract that performs the evaluation logic.
  • matchTarget: Expected boolean result to decide Assistant invocation.
  • instructions: Additional data required for evaluation.
• Evaluated per Assistant to determine eligibility.

Interactions:

• Evaluated by URDuap for each Assistant.
• URDuap calls evaluate function on the filterLogicAddress with transaction data and instructions.
• The result is compared with matchTarget to decide on Assistant invocation.

7. Assistants

Role:

• Modular contracts performing specific actions upon invocation.

Responsibilities:

• Implement an execute function to process transaction data.
• Can modify value and data for subsequent processing.
• May forward content to external entities (e.g., Vaults).
• Return updated value and data to URDuap.

Interactions:

• Invoked by URDuap after filters pass.
• Receive current value and data from URDuap.
• Return updated value and data.
• May interact with Third Parties.

8. Vault Contracts - LSP9

Role:

• Secure storage for assets managed by Assistants.

Responsibilities:

• Hold assets redirected by Assistants (e.g., unwanted tokens).
• Provide interfaces for users to access or manage stored assets.

Interactions:

• Assistants interact with Vaults to store assets.
• Ensure secure separation from the main UP.

9. Default Universal Receiver Delegate (LSP1)

Role:

• The standard Universal Receiver Delegate implementation.

Responsibilities:

• Handles incoming transactions in the default manner.
• Provides basic processing when no user-defined actions apply.

Interactions:

• URDuap Defaults to This Behavior: If no applicable Assistants are found.
• Assistants May Not Invoke LSP1 Directly: Assistants handle specific actions independently.

Detailed Universal Assistant Protocol Transaction Flow

sequenceDiagram
    participant User
    participant LSP7_Token as LSP7/LSP8 Token Contract
    participant UP as Universal Profile (ERC725Y)
    participant URDuap
    participant ERC725Y as ERC725Y Data Store
    participant Assistant1 as Assistant 1
    participant Assistant2 as Assistant 2
    participant AssistantN as Assistant N
    participant FilterLogic as Filter Logic Contract
    participant ThirdParty as Third Party
    participant LSP1 as Default Universal Receiver Delegate (LSP1)

    %% Step 1: User initiates a transaction (e.g., token transfer) to their Universal Profile
    User->>LSP7_Token: Transfer tokens or send payload to UP
    LSP7_Token->>UP: Notify Transfer (typeId, data)

    %% Step 2: Universal Profile delegates handling to URDuap
    UP->>URDuap: Call universalReceiverDelegate(caller, value, typeId, data)

    %% Step 3: URDuap retrieves Assistants based on typeId
    URDuap->>ERC725Y: Get OrderedAssistantAddresses for typeId
    ERC725Y-->>URDuap: Return AssistantAddresses [Addr1, Addr2, ..., AddrN]

    %% Step 4: URDuap processes each Assistant in order
    loop For each AssistantAddress in AssistantAddresses
        alt Assistant is available
            %% URDuap retrieves Filters associated with the Assistant
            URDuap->>ERC725Y: Get Filters for AssistantAddress
            ERC725Y-->>URDuap: Return Filters [Filter1, Filter2, ...]

            %% Step 5: URDuap evaluates Filters
            loop For each Filter in Filters
                URDuap->>FilterLogic: Evaluate(notifier, value, typeId, data, instructions)
                FilterLogic-->>URDuap: Return result (true/false)

                %% Compare result with matchTarget
                alt result == matchTarget
                    %% Filter passes, proceed
                else
                    %% Filter does not match, skip Assistant
                    URDuap->>URDuap: Skip to next Assistant
                end
            end

            %% Step 6: Invoke Assistant's execute function
            URDuap->>Assistant: execute(notifier, value, typeId, data)
            Assistant-->>URDuap: Return (value, data)

            %% Assistant may interact with Third Parties
            alt Assistant forwards content
                Assistant->>ThirdParty: Forward processed content
            end

            URDuap->>URDuap: Update value and data
        else
            %% Assistant is not available or disabled; skip
        end
    end

    %% Step 7: Finalize transaction handling
    alt No Assistants were invoked
        URDuap->>LSP1: Invoke default behavior
        LSP1-->>URDuap: Return actionData
    end
    URDuap->>UP: Return final actionData or confirmation
    UP->>User: Confirm transaction processing

Flow Explanation

1. User Initiates Transaction:

   • The User interacts with the LSP7 Token Contract to transfer tokens to their Universal Profile (UP).
   • The LSP7 Token Contract notifies the UP of the transfer, including typeId and data.

2. Delegation to URDuap:

   • The UP delegates the handling to the URDuap by calling universalReceiverDelegate(caller, value, typeId, data).

3. Retrieving Assistants Based on typeId:

   • URDuap queries the ERC725Y Data Store for an ordered list of Assistant Addresses associated with typeId.

4. Processing Each Assistant in Order:

   • URDuap loops through each Assistant in the retrieved order.
   • Checks Assistant Availability: Skips if the Assistant is unavailable or disabled.

5. Evaluating Filters:

   • For each Assistant, URDuap retrieves associated Filters from ERC725Y.
   • URDuap evaluates each Filter using the Filter Logic Contract.
   • Compares the result with matchTarget to decide if the Assistant should be invoked.
   • If any filter fails to match, URDuap skips to the next Assistant.

6. Invoking Assistant's execute Function:

   • If all filters pass, URDuap invokes the Assistant's execute function.
   • Assistant processes the transaction, potentially modifying value and data.
   • Assistant may interact with Third Parties.
   • URDuap updates value and data based on the Assistant's output.

7. Finalizing Transaction Handling:

   • After all Assistants are processed, URDuap may invoke LSP1 if no Assistants were invoked.
   • URDuap returns the final action data to the UP.
   • The UP confirms the transaction processing to the User.

Detailed Component Roles

1. Universal Receiver Delegate (URDuap):

   • Orchestrates transaction handling.
   • Retrieves and evaluates Assistants and their Filters.
   • Invokes eligible Assistants via execute function.
   • Updates transaction data based on Assistants' output.
   • Defaults to standard behavior if necessary.

2. ERC725Y Data Store:

   • Stores configurations for Assistants and Filters.
   • Provides data retrieval for URDuap.

3. Assistants:

   • Modular contracts performing specific actions.
   • Implement execute function to process data.
   • May modify value and data.
   • Can interact with Third Parties.

4. Filters:

   • Define criteria for Assistant invocation.
   • Contain evaluation logic via filterLogicAddress.
   • Use matchTarget to determine eligibility.

5. Filter Logic Contract:

   • Evaluates Filters based on provided instructions.
   • Returns boolean results for comparison.

6. LSP7 Token Contract:

   • Initiates transactions to the UP.
   • Triggers the URDuap upon token transfers.