diff --git a/native/cpp/CommonCpp/grpc/grpc_client/src/lib.rs b/native/cpp/CommonCpp/grpc/grpc_client/src/lib.rs
index 4212b214a..f001f0819 100644
--- a/native/cpp/CommonCpp/grpc/grpc_client/src/lib.rs
+++ b/native/cpp/CommonCpp/grpc/grpc_client/src/lib.rs
@@ -1,619 +1,663 @@
 use lazy_static::lazy_static;
 use opaque_ke::{
   ClientLogin, ClientLoginFinishParameters, ClientLoginStartParameters,
   ClientLoginStartResult, ClientRegistration,
   ClientRegistrationFinishParameters, CredentialFinalization,
   CredentialResponse, RegistrationResponse, RegistrationUpload,
 };
 use rand::{rngs::OsRng, CryptoRng, Rng};
 use std::sync::Arc;
 use tokio::runtime::{Builder, Runtime};
 use tokio::sync::mpsc;
 use tokio_stream::wrappers::ReceiverStream;
 use tonic::{transport::Channel, Request, Status};
 use tracing::{error, instrument};
 
 use ::identity::Cipher;
 
 use crate::identity::{
   identity_service_client::IdentityServiceClient,
   login_request::Data::PakeLoginRequest,
   login_request::Data::WalletLoginRequest,
   login_response::Data::PakeLoginResponse as LoginPakeLoginResponse,
   login_response::Data::WalletLoginResponse,
   pake_login_request::Data::PakeCredentialFinalization as LoginPakeCredentialFinalization,
   pake_login_request::Data::PakeCredentialRequestAndUserId,
   pake_login_response::Data::AccessToken,
   pake_login_response::Data::PakeCredentialResponse,
   registration_request::Data::PakeCredentialFinalization as RegistrationPakeCredentialFinalization,
   registration_request::Data::PakeRegistrationRequestAndUserId,
   registration_request::Data::PakeRegistrationUploadAndCredentialRequest,
   registration_response::Data::PakeLoginResponse as RegistrationPakeLoginResponse,
   registration_response::Data::PakeRegistrationResponse, GetUserIdRequest,
   LoginRequest, LoginResponse,
   PakeCredentialRequestAndUserId as PakeCredentialRequestAndUserIdStruct,
   PakeLoginRequest as PakeLoginRequestStruct,
   PakeLoginResponse as PakeLoginResponseStruct,
   PakeRegistrationRequestAndUserId as PakeRegistrationRequestAndUserIdStruct,
   PakeRegistrationUploadAndCredentialRequest as PakeRegistrationUploadAndCredentialRequestStruct,
   RegistrationRequest, RegistrationResponse as RegistrationResponseMessage,
   VerifyUserTokenRequest, WalletLoginRequest as WalletLoginRequestStruct,
   WalletLoginResponse as WalletLoginResponseStruct,
 };
 pub mod identity {
   tonic::include_proto!("identity");
 }
 
 const IDENTITY_SERVICE_SOCKET_ADDR: &str = "https://[::1]:50051";
 
 lazy_static! {
   pub static ref RUNTIME: Arc<Runtime> = Arc::new(
     Builder::new_multi_thread()
       .worker_threads(1)
       .max_blocking_threads(1)
       .enable_all()
       .build()
       .unwrap()
   );
 }
 
 #[cxx::bridge(namespace = "identity")]
-mod ffi {}
+mod ffi {
+  extern "Rust" {
+    type Client;
+    fn initialize_client() -> Box<Client>;
+    fn get_user_id_blocking(
+      client: Box<Client>,
+      auth_type: i32,
+      user_info: String,
+    ) -> Result<String>;
+    fn verify_user_token_blocking(
+      client: Box<Client>,
+      user_id: String,
+      device_id: String,
+      access_token: String,
+    ) -> Result<bool>;
+    fn register_user_blocking(
+      client: Box<Client>,
+      user_id: String,
+      device_id: String,
+      username: String,
+      password: String,
+      user_public_key: String,
+    ) -> Result<String>;
+    fn login_user_pake_blocking(
+      client: Box<Client>,
+      user_id: String,
+      device_id: String,
+      password: String,
+    ) -> Result<String>;
+    fn login_user_wallet_blocking(
+      client: Box<Client>,
+      user_id: String,
+      device_id: String,
+      siwe_message: String,
+      siwe_signature: Vec<u8>,
+      user_public_key: String,
+    ) -> Result<String>;
+  }
+}
+
+#[derive(Debug)]
+enum AuthType {
+  Password = 0,
+  Wallet = 1,
+}
 
 #[derive(Debug)]
 struct Client {
   identity_client: IdentityServiceClient<Channel>,
 }
 
 fn initialize_client() -> Box<Client> {
   Box::new(Client {
     identity_client: RUNTIME
       .block_on(IdentityServiceClient::connect(IDENTITY_SERVICE_SOCKET_ADDR))
       .unwrap(),
   })
 }
 
 async fn get_user_id(
   mut client: Box<Client>,
   auth_type: i32,
   user_info: String,
 ) -> Result<String, Status> {
   Ok(
     client
       .identity_client
       .get_user_id(GetUserIdRequest {
         auth_type,
         user_info,
       })
       .await?
       .into_inner()
       .user_id,
   )
 }
 
 #[instrument]
 fn get_user_id_blocking(
   client: Box<Client>,
   auth_type: i32,
   user_info: String,
 ) -> Result<String, Status> {
   RUNTIME.block_on(get_user_id(client, auth_type, user_info))
 }
 
 async fn verify_user_token(
   mut client: Box<Client>,
   user_id: String,
   device_id: String,
   access_token: String,
 ) -> Result<bool, Status> {
   Ok(
     client
       .identity_client
       .verify_user_token(VerifyUserTokenRequest {
         user_id,
         device_id,
         access_token,
       })
       .await?
       .into_inner()
       .token_valid,
   )
 }
 
 #[instrument]
 fn verify_user_token_blocking(
   client: Box<Client>,
   user_id: String,
   device_id: String,
   access_token: String,
 ) -> Result<bool, Status> {
   RUNTIME.block_on(verify_user_token(client, user_id, device_id, access_token))
 }
 
 async fn register_user(
   mut client: Box<Client>,
   user_id: String,
   device_id: String,
   username: String,
   password: String,
   user_public_key: String,
 ) -> Result<String, Status> {
   // Create a RegistrationRequest channel and use ReceiverStream to turn the
   // MPSC receiver into a Stream for outbound messages
   let (tx, rx) = mpsc::channel(1);
   let stream = ReceiverStream::new(rx);
   let request = Request::new(stream);
 
   // `response` is the Stream for inbound messages
   let mut response = client
     .identity_client
     .register_user(request)
     .await?
     .into_inner();
 
   // Start PAKE registration on client and send initial registration request
   // to Identity service
   let mut client_rng = OsRng;
   let (registration_request, client_registration) = pake_registration_start(
     &mut client_rng,
     user_id,
     &password,
     device_id,
     username,
     user_public_key,
   )?;
   if let Err(e) = tx.send(registration_request).await {
     error!("Response was dropped: {}", e);
     return Err(Status::aborted("Dropped response"));
   }
 
   // Handle responses from Identity service sequentially, making sure we get
   // messages in the correct order
 
   // Finish PAKE registration and begin PAKE login; send the final
   // registration request and initial login request together to reduce the
   // number of trips
   let message = response.message().await?;
   let client_login = handle_registration_response(
     message,
     &mut client_rng,
     client_registration,
     &password,
     tx.clone(),
   )
   .await?;
 
   // Finish PAKE login; send final login request to Identity service
   let message = response.message().await?;
   handle_registration_credential_response(message, client_login, tx).await?;
 
   // Return access token
   let message = response.message().await?;
   handle_registration_token_response(message)
 }
 
 #[instrument]
 fn register_user_blocking(
   client: Box<Client>,
   user_id: String,
   device_id: String,
   username: String,
   password: String,
   user_public_key: String,
 ) -> Result<String, Status> {
   RUNTIME.block_on(register_user(
     client,
     user_id,
     device_id,
     username,
     password,
     user_public_key,
   ))
 }
 
 async fn login_user_pake(
   mut client: Box<Client>,
   user_id: String,
   device_id: String,
   password: String,
 ) -> Result<String, Status> {
   // Create a LoginRequest channel and use ReceiverStream to turn the
   // MPSC receiver into a Stream for outbound messages
   let (tx, rx) = mpsc::channel(1);
   let stream = ReceiverStream::new(rx);
   let request = Request::new(stream);
 
   // `response` is the Stream for inbound messages
   let mut response = client
     .identity_client
     .login_user(request)
     .await?
     .into_inner();
 
   // Start PAKE login on client and send initial login request to Identity
   // service
   let mut client_rng = OsRng;
   let client_login_start_result = pake_login_start(&mut client_rng, &password)?;
   let login_request = LoginRequest {
     data: Some(PakeLoginRequest(PakeLoginRequestStruct {
       data: Some(PakeCredentialRequestAndUserId(
         PakeCredentialRequestAndUserIdStruct {
           user_id,
           device_id,
           pake_credential_request: client_login_start_result
             .message
             .serialize()
             .map_err(|e| {
               error!("Could not serialize credential request: {}", e);
               Status::failed_precondition("PAKE failure")
             })?,
         },
       )),
     })),
   };
   if let Err(e) = tx.send(login_request).await {
     error!("Response was dropped: {}", e);
     return Err(Status::aborted("Dropped response"));
   }
 
   // Handle responses from Identity service sequentially, making sure we get
   // messages in the correct order
 
   // Finish PAKE login; send final login request to Identity service
   let message = response.message().await?;
   handle_login_credential_response(
     message,
     client_login_start_result.state,
     tx,
   )
   .await?;
 
   // Return access token
   let message = response.message().await?;
   handle_login_token_response(message)
 }
 
 #[instrument]
 fn login_user_pake_blocking(
   client: Box<Client>,
   user_id: String,
   device_id: String,
   password: String,
 ) -> Result<String, Status> {
   RUNTIME.block_on(login_user_pake(client, user_id, device_id, password))
 }
 
 async fn login_user_wallet(
   mut client: Box<Client>,
   user_id: String,
   device_id: String,
   siwe_message: String,
   siwe_signature: Vec<u8>,
   user_public_key: String,
 ) -> Result<String, Status> {
   // Create a LoginRequest channel and use ReceiverStream to turn the
   // MPSC receiver into a Stream for outbound messages
   let (tx, rx) = mpsc::channel(1);
   let stream = ReceiverStream::new(rx);
   let request = Request::new(stream);
 
   // `response` is the Stream for inbound messages
   let mut response = client
     .identity_client
     .login_user(request)
     .await?
     .into_inner();
 
   // Start wallet login on client and send initial login request to Identity
   // service
   let login_request = LoginRequest {
     data: Some(WalletLoginRequest(WalletLoginRequestStruct {
       user_id,
       device_id,
       siwe_message,
       siwe_signature,
       user_public_key,
     })),
   };
   if let Err(e) = tx.send(login_request).await {
     error!("Response was dropped: {}", e);
     return Err(Status::aborted("Dropped response"));
   }
 
   // Return access token
   let message = response.message().await?;
   handle_wallet_login_response(message)
 }
 
 #[instrument]
 fn login_user_wallet_blocking(
   client: Box<Client>,
   user_id: String,
   device_id: String,
   siwe_message: String,
   siwe_signature: Vec<u8>,
   user_public_key: String,
 ) -> Result<String, Status> {
   RUNTIME.block_on(login_user_wallet(
     client,
     user_id,
     device_id,
     siwe_message,
     siwe_signature,
     user_public_key,
   ))
 }
 
 fn pake_registration_start(
   rng: &mut (impl Rng + CryptoRng),
   user_id: String,
   password: &str,
   device_id: String,
   username: String,
   user_public_key: String,
 ) -> Result<(RegistrationRequest, ClientRegistration<Cipher>), Status> {
   let client_registration_start_result =
     ClientRegistration::<Cipher>::start(rng, password.as_bytes()).map_err(
       |e| {
         error!("Failed to start PAKE registration: {}", e);
         Status::failed_precondition("PAKE failure")
       },
     )?;
   let pake_registration_request =
     client_registration_start_result.message.serialize();
   Ok((
     RegistrationRequest {
       data: Some(PakeRegistrationRequestAndUserId(
         PakeRegistrationRequestAndUserIdStruct {
           user_id,
           device_id,
           pake_registration_request,
           username,
           user_public_key,
         },
       )),
     },
     client_registration_start_result.state,
   ))
 }
 
 fn pake_registration_finish(
   rng: &mut (impl Rng + CryptoRng),
   registration_response_bytes: &[u8],
   client_registration: ClientRegistration<Cipher>,
 ) -> Result<RegistrationUpload<Cipher>, Status> {
   client_registration
     .finish(
       rng,
       RegistrationResponse::deserialize(registration_response_bytes).map_err(
         |e| {
           error!("Could not deserialize registration response bytes: {}", e);
           Status::aborted("Invalid response bytes")
         },
       )?,
       ClientRegistrationFinishParameters::default(),
     )
     .map_err(|e| {
       error!("Failed to finish PAKE registration: {}", e);
       Status::aborted("PAKE failure")
     })
     .map(|res| res.message)
 }
 
 fn pake_login_start(
   rng: &mut (impl Rng + CryptoRng),
   password: &str,
 ) -> Result<ClientLoginStartResult<Cipher>, Status> {
   ClientLogin::<Cipher>::start(
     rng,
     password.as_bytes(),
     ClientLoginStartParameters::default(),
   )
   .map_err(|e| {
     error!("Failed to start PAKE login: {}", e);
     Status::failed_precondition("PAKE failure")
   })
 }
 
 fn pake_login_finish(
   credential_response_bytes: &[u8],
   client_login: ClientLogin<Cipher>,
 ) -> Result<CredentialFinalization<Cipher>, Status> {
   client_login
     .finish(
       CredentialResponse::deserialize(credential_response_bytes).map_err(
         |e| {
           error!("Could not deserialize credential response bytes: {}", e);
           Status::aborted("Invalid response bytes")
         },
       )?,
       ClientLoginFinishParameters::default(),
     )
     .map_err(|e| {
       error!("Failed to finish PAKE login: {}", e);
       Status::aborted("PAKE failure")
     })
     .map(|res| res.message)
 }
 
 fn handle_unexpected_response<T: std::fmt::Debug>(
   message: Option<T>,
 ) -> Status {
   error!("Received an unexpected message: {:?}", message);
   Status::invalid_argument("Invalid response data")
 }
 
 async fn handle_registration_response(
   message: Option<RegistrationResponseMessage>,
   client_rng: &mut (impl Rng + CryptoRng),
   client_registration: ClientRegistration<Cipher>,
   password: &str,
   tx: mpsc::Sender<RegistrationRequest>,
 ) -> Result<ClientLogin<Cipher>, Status> {
   if let Some(RegistrationResponseMessage {
     data: Some(PakeRegistrationResponse(registration_response_bytes)),
     ..
   }) = message
   {
     let pake_registration_upload = pake_registration_finish(
       client_rng,
       &registration_response_bytes,
       client_registration,
     )?
     .serialize();
     let client_login_start_result = pake_login_start(client_rng, password)?;
 
     // `registration_request` is a gRPC message containing serialized bytes to
     // complete PAKE registration and begin PAKE login
     let registration_request = RegistrationRequest {
       data: Some(PakeRegistrationUploadAndCredentialRequest(
         PakeRegistrationUploadAndCredentialRequestStruct {
           pake_registration_upload,
           pake_credential_request: client_login_start_result
             .message
             .serialize()
             .map_err(|e| {
               error!("Could not serialize credential request: {}", e);
               Status::failed_precondition("PAKE failure")
             })?,
         },
       )),
     };
     if let Err(e) = tx.send(registration_request).await {
       error!("Response was dropped: {}", e);
       return Err(Status::aborted("Dropped response"));
     }
     Ok(client_login_start_result.state)
   } else {
     Err(handle_unexpected_response(message))
   }
 }
 
 async fn handle_registration_credential_response(
   message: Option<RegistrationResponseMessage>,
   client_login: ClientLogin<Cipher>,
   tx: mpsc::Sender<RegistrationRequest>,
 ) -> Result<(), Status> {
   if let Some(RegistrationResponseMessage {
     data:
       Some(RegistrationPakeLoginResponse(PakeLoginResponseStruct {
         data: Some(PakeCredentialResponse(credential_response_bytes)),
       })),
   }) = message
   {
     let registration_request = RegistrationRequest {
       data: Some(RegistrationPakeCredentialFinalization(
         pake_login_finish(&credential_response_bytes, client_login)?
           .serialize()
           .map_err(|e| {
             error!("Could not serialize credential request: {}", e);
             Status::failed_precondition("PAKE failure")
           })?,
       )),
     };
     send_to_mpsc(tx, registration_request).await
   } else {
     Err(handle_unexpected_response(message))
   }
 }
 
 async fn handle_login_credential_response(
   message: Option<LoginResponse>,
   client_login: ClientLogin<Cipher>,
   tx: mpsc::Sender<LoginRequest>,
 ) -> Result<(), Status> {
   if let Some(LoginResponse {
     data:
       Some(LoginPakeLoginResponse(PakeLoginResponseStruct {
         data: Some(PakeCredentialResponse(credential_response_bytes)),
       })),
   }) = message
   {
     let login_request = LoginRequest {
       data: Some(PakeLoginRequest(PakeLoginRequestStruct {
         data: Some(LoginPakeCredentialFinalization(
           pake_login_finish(&credential_response_bytes, client_login)?
             .serialize()
             .map_err(|e| {
               error!("Could not serialize credential request: {}", e);
               Status::failed_precondition("PAKE failure")
             })?,
         )),
       })),
     };
     send_to_mpsc(tx, login_request).await
   } else {
     Err(handle_unexpected_response(message))
   }
 }
 
 fn handle_registration_token_response(
   message: Option<RegistrationResponseMessage>,
 ) -> Result<String, Status> {
   if let Some(RegistrationResponseMessage {
     data:
       Some(RegistrationPakeLoginResponse(PakeLoginResponseStruct {
         data: Some(AccessToken(access_token)),
       })),
   }) = message
   {
     Ok(access_token)
   } else {
     Err(handle_unexpected_response(message))
   }
 }
 
 fn handle_login_token_response(
   message: Option<LoginResponse>,
 ) -> Result<String, Status> {
   if let Some(LoginResponse {
     data:
       Some(LoginPakeLoginResponse(PakeLoginResponseStruct {
         data: Some(AccessToken(access_token)),
       })),
   }) = message
   {
     Ok(access_token)
   } else {
     Err(handle_unexpected_response(message))
   }
 }
 
 fn handle_wallet_login_response(
   message: Option<LoginResponse>,
 ) -> Result<String, Status> {
   if let Some(LoginResponse {
     data: Some(WalletLoginResponse(WalletLoginResponseStruct { access_token })),
   }) = message
   {
     Ok(access_token)
   } else {
     Err(handle_unexpected_response(message))
   }
 }
 
 struct RegistrationResponseAndSender {
   response: Option<RegistrationResponseMessage>,
   sender: mpsc::Sender<RegistrationRequest>,
 }
 
 struct LoginResponseAndSender {
   response: Option<LoginResponse>,
   sender: mpsc::Sender<LoginRequest>,
 }
 
 enum ResponseAndSender {
   Registration(RegistrationResponseAndSender),
   Login(LoginResponseAndSender),
 }
 
 async fn send_to_mpsc<T>(
   tx: mpsc::Sender<T>,
   request: T,
 ) -> Result<(), Status> {
   if let Err(e) = tx.send(request).await {
     error!("Response was dropped: {}", e);
     return Err(Status::aborted("Dropped response"));
   }
   Ok(())
 }