# Identity based on a smart contract ## Goal Consume an external lending or borrowing service through the RIF Gateway's service interface. ## Use cases ### N-N ```mermaid sequenceDiagram actor EOA participant SP_Interface_SC participant Identity_SC participant Lending_Service EOA->>SP_Interface_SC: Call SP_Interface_SC->>SP_Interface_SC: Gets identity from own mapping SP_Interface_SC->>Identity_SC: Request Execute call Identity_SC->>Lending_Service: Lend() Lending_Service-->>Identity_SC: Ok() or Fail() Identity_SC-->>SP_Interface_SC: Ok() or Fail() SP_Interface_SC-->>EOA: Ok() or Fail() ``` Note: Identity_SC must whitelist the SP_Interface_SC to allow calls only from that specific smart contract. ### 1-N (RIF Gateway Owner allows service providers to use individual identities) ```mermaid sequenceDiagram actor EOA participant SP_Interface_SC participant Identity_Factory participant Identity_SC participant Lending_Service EOA->>SP_Interface_SC: Call SP_Interface_SC->>Identity_Factory: Request identity Identity_Factory-->>SP_Interface_SC: EOA Smart Contract Identity SP_Interface_SC->>Identity_SC: Request execute call Identity_SC->>Lending_Service: Lend() Lending_Service-->>Identity_SC: Ok() or Fail() Identity_SC-->>SP_Interface_SC: Ok() or Fail() SP_Interface_SC-->>EOA: Ok() or Fail() ``` ### 1-N Fully Decentralized (User allows service providers to use individual identities) ```mermaid sequenceDiagram actor EOA participant SP_Interface_SC participant Identity_Factory participant Identity_SC participant Lending_Service EOA->>Identity_Factory: Approve(SP_Interface_SC) EOA->>SP_Interface_SC: Call SP_Interface_SC->>Identity_Factory: Request identity Identity_Factory-->>SP_Interface_SC: EOA Smart Contract Identity SP_Interface_SC->>Identity_SC: Request execute call Identity_SC->>Lending_Service: Lend() Lending_Service-->>Identity_SC: Ok() or Fail() Identity_SC-->>SP_Interface_SC: Ok() or Fail() SP_Interface_SC-->>EOA: Ok() or Fail() ```