# ✨ Feature Request: Add 'ENABLE' Mode Support to Smart Sessions Module

[joepegler]

Feature or Improvement Description

Implement 'ENABLE' mode support in the Smart Sessions Module of the Nexus SDK. This mode allows permissions to be granted off-chain by the user and then activated on-chain by the dapp just before use.

Benefits & Outcomes

• Enhance flexibility in permission management for smart sessions
• Reduce on-chain transactions for granting permissions, potentially lowering gas costs
• Allow dapps to manage permissions more dynamically, activating them only when needed
• Improve user experience by reducing the number of on-chain transactions users need to approve
• Provide a more versatile toolkit for developers implementing smart sessions

Implementation Ideas

1. Extend the SmartSessionMode enum in the Smart Sessions Module:

   enum SmartSessionMode {
     USE,
     ENABLE
   }

2. Implement off-chain permission granting functionality:

   • Create a method for users to sign off-chain messages granting permissions
   • Store these signed permissions securely (consider local storage or a separate database)

3. Develop on-chain activation for 'ENABLE' mode:

   • Create a new smart contract function to activate off-chain granted permissions
   • Implement verification of the user's off-chain signature in the smart contract

4. Update the toSmartSessionsValidator function to support 'ENABLE' mode:

   const sessionsModule = toSmartSessionsValidator({
     account: nexusClient.account,
     signer: eoaAccount,
     mode: SmartSessionMode.ENABLE
   })

5. Extend the Nexus client with new actions for 'ENABLE' mode:

   const enableSessionNexusClient = nexusClient.extend(
     smartSessionEnableActions(sessionsModule)
   )

6. Implement new methods for the extended client:

   • grantOffChainPermission: For users to grant permissions off-chain
   • activatePermission: For dapps to activate the off-chain granted permission on-chain

7. Update existing smart session creation and use flows to accommodate 'ENABLE' mode

8. Implement proper error handling and edge case management for the new mode

9. Develop comprehensive unit and integration tests for 'ENABLE' mode functionality

10. Update documentation to reflect the new 'ENABLE' mode and its usage

References

• Existing Smart Sessions Module Documentation
• Nexus SDK Modules README
• EIP-712: Typed structured data hashing and signing

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Any References?

No response

Code of Conduct

• I agree to follow this project's Code of Conduct.