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 </pre><pre class="rust"><code><span class="comment">// Licensed to the Apache Software Foundation (ASF) under one
 // or more contributor license agreements.  See the NOTICE file
 // distributed with this work for additional information
 // regarding copyright ownership.  The ASF licenses this file
 // to you under the Apache License, Version 2.0 (the
 // &quot;License&quot;); you may not use this file except in compliance
 // with the License.  You may obtain a copy of the License at
 //
 //   http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing,
 // software distributed under the License is distributed on an
 // &quot;AS IS&quot; BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 // KIND, either express or implied.  See the License for the
 // specific language governing permissions and limitations
 // under the License.

 </span><span class="kw">use super</span>::<span class="kw-2">*</span>;

 <span class="kw">use </span>audit::Auditor;
 <span class="kw">use </span>error::ManagementServiceError;

 <span class="kw">use </span>anyhow::anyhow;
 <span class="kw">use </span>std::convert::TryInto;
 <span class="kw">use </span>std::sync::Arc;
 <span class="kw">use </span>teaclave_proto::teaclave_common::i32_from_task_status;
 <span class="kw">use </span>teaclave_proto::teaclave_frontend_service::{
     from_proto_file_ids, from_proto_ownership, to_proto_file_ids, to_proto_ownership,
 };
 <span class="kw">use </span>teaclave_proto::teaclave_frontend_service::{
     ApproveTaskRequest, AssignDataRequest, CancelTaskRequest, CreateTaskRequest,
     CreateTaskResponse, DeleteFunctionRequest, DisableFunctionRequest, GetFunctionRequest,
     GetFunctionResponse, GetFunctionUsageStatsRequest, GetFunctionUsageStatsResponse,
     GetInputFileRequest, GetInputFileResponse, GetOutputFileRequest, GetOutputFileResponse,
     GetTaskRequest, GetTaskResponse, InvokeTaskRequest, ListFunctionsRequest,
     ListFunctionsResponse, QueryAuditLogsRequest, QueryAuditLogsResponse, RegisterFunctionRequest,
     RegisterFunctionResponse, RegisterFusionOutputRequest, RegisterFusionOutputResponse,
     RegisterInputFileRequest, RegisterInputFileResponse, RegisterInputFromOutputRequest,
     RegisterInputFromOutputResponse, RegisterOutputFileRequest, RegisterOutputFileResponse,
     UpdateFunctionRequest, UpdateFunctionResponse, UpdateInputFileRequest, UpdateInputFileResponse,
     UpdateOutputFileRequest, UpdateOutputFileResponse,
 };
 <span class="kw">use </span>teaclave_proto::teaclave_management_service::{SaveLogsRequest, TeaclaveManagement};
 <span class="kw">use </span>teaclave_proto::teaclave_storage_service::{
     DeleteRequest, EnqueueRequest, GetKeysByPrefixRequest, GetRequest, PutRequest,
     TeaclaveStorageClient,
 };
 <span class="kw">use </span>teaclave_rpc::transport::{channel::Endpoint, Channel};
 <span class="kw">use </span>teaclave_rpc::{Request, Response};
 <span class="kw">use </span>teaclave_service_enclave_utils::ensure;
 <span class="kw">use </span>teaclave_types::<span class="kw-2">*</span>;
 <span class="kw">use </span>tokio::sync::Mutex;
 <span class="kw">use </span>tokio::task;
 <span class="kw">use </span>url::Url;
 <span class="kw">use </span>uuid::Uuid;

 <span class="attribute">#[derive(Clone)]
 </span><span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">struct </span>TeaclaveManagementService {
     storage_client: Arc&lt;Mutex&lt;TeaclaveStorageClient&lt;Channel&gt;&gt;&gt;,
     auditor: audit::Auditor,
 }

 <span class="attribute">#[teaclave_rpc::async_trait]
 </span><span class="kw">impl </span>TeaclaveManagement <span class="kw">for </span>TeaclaveManagementService {
     <span class="comment">// access control: none
     </span><span class="kw">async fn </span>register_input_file(
         <span class="kw-2">&amp;</span><span class="self">self</span>,
         request: Request&lt;RegisterInputFileRequest&gt;,
     ) -&gt; TeaclaveServiceResponseResult&lt;RegisterInputFileResponse&gt; {
         <span class="kw">let </span>user_id = get_request_user_id(<span class="kw-2">&amp;</span>request)<span class="question-mark">?</span>;
         <span class="kw">let </span>request = request.into_inner();
         <span class="kw">let </span>url = Url::parse(<span class="kw-2">&amp;</span>request.url).map_err(tonic_error)<span class="question-mark">?</span>;
         <span class="kw">let </span>cmac = FileAuthTag::from_bytes(<span class="kw-2">&amp;</span>request.cmac).map_err(tonic_error)<span class="question-mark">?</span>;
         <span class="kw">let </span>crypto_info = request
             .crypto_info
             .ok_or_else(|| tonic_error(<span class="string">&quot;missing crypto_info&quot;</span>))<span class="question-mark">?
             </span>.try_into()
             .map_err(tonic_error)<span class="question-mark">?</span>;

         <span class="kw">let </span>input_file = TeaclaveInputFile::new(url, cmac, crypto_info, <span class="macro">vec!</span>[user_id]);

         <span class="self">self</span>.write_to_db(<span class="kw-2">&amp;</span>input_file).<span class="kw">await</span><span class="question-mark">?</span>;

         <span class="kw">let </span>response = RegisterInputFileResponse::new(input_file.external_id());
         <span class="prelude-val">Ok</span>(Response::new(response))
     }

     <span class="comment">// access control:
     // 1) exisiting_file.owner_list.len() == 1
     // 2) user_id in existing_file.owner_list
     </span><span class="kw">async fn </span>update_input_file(
         <span class="kw-2">&amp;</span><span class="self">self</span>,
         request: Request&lt;UpdateInputFileRequest&gt;,
     ) -&gt; TeaclaveServiceResponseResult&lt;UpdateInputFileResponse&gt; {
         <span class="kw">let </span>user_id = get_request_user_id(<span class="kw-2">&amp;</span>request)<span class="question-mark">?</span>;
         <span class="kw">let </span>request = request.into_inner();

         <span class="kw">let </span>old_input_file: TeaclaveInputFile = <span class="self">self
             </span>.read_from_db(<span class="kw-2">&amp;</span>request.data_id.try_into().map_err(tonic_error)<span class="question-mark">?</span>)
             .<span class="kw">await
             </span>.map_err(|<span class="kw">_</span>| ManagementServiceError::InvalidDataId)<span class="question-mark">?</span>;

         <span class="macro">ensure!</span>(
             old_input_file.owner == OwnerList::from(<span class="macro">vec!</span>[user_id]),
             ManagementServiceError::PermissionDenied
         );

         <span class="kw">let </span>input_file = TeaclaveInputFile::new(
             Url::parse(<span class="kw-2">&amp;</span>request.url).map_err(tonic_error)<span class="question-mark">?</span>,
             old_input_file.cmac,
             old_input_file.crypto_info,
             old_input_file.owner,
         );

         <span class="self">self</span>.write_to_db(<span class="kw-2">&amp;</span>input_file).<span class="kw">await</span><span class="question-mark">?</span>;

         <span class="kw">let </span>response = UpdateInputFileResponse::new(input_file.external_id());
         <span class="prelude-val">Ok</span>(Response::new(response))
     }

     <span class="comment">// access control: none
     </span><span class="kw">async fn </span>register_output_file(
         <span class="kw-2">&amp;</span><span class="self">self</span>,
         request: Request&lt;RegisterOutputFileRequest&gt;,
     ) -&gt; TeaclaveServiceResponseResult&lt;RegisterOutputFileResponse&gt; {
         <span class="kw">let </span>user_id = get_request_user_id(<span class="kw-2">&amp;</span>request)<span class="question-mark">?</span>;
         <span class="kw">let </span>request = request.into_inner();
         <span class="kw">let </span>output_file = TeaclaveOutputFile::new(
             Url::parse(<span class="kw-2">&amp;</span>request.url).map_err(tonic_error)<span class="question-mark">?</span>,
             request
                 .crypto_info
                 .ok_or_else(|| tonic_error(<span class="string">&quot;missing crypto_info&quot;</span>))<span class="question-mark">?
                 </span>.try_into()
                 .map_err(tonic_error)<span class="question-mark">?</span>,
             <span class="macro">vec!</span>[user_id],
         );

         <span class="self">self</span>.write_to_db(<span class="kw-2">&amp;</span>output_file).<span class="kw">await</span><span class="question-mark">?</span>;

         <span class="kw">let </span>response = RegisterOutputFileResponse::new(output_file.external_id());
         <span class="prelude-val">Ok</span>(Response::new(response))
     }

     <span class="comment">// access control:
     // 1) exisiting_file.owner_list.len() == 1
     // 2) user_id in existing_file.owner_list
     </span><span class="kw">async fn </span>update_output_file(
         <span class="kw-2">&amp;</span><span class="self">self</span>,
         request: Request&lt;UpdateOutputFileRequest&gt;,
     ) -&gt; TeaclaveServiceResponseResult&lt;UpdateOutputFileResponse&gt; {
         <span class="kw">let </span>user_id = get_request_user_id(<span class="kw-2">&amp;</span>request)<span class="question-mark">?</span>;
         <span class="kw">let </span>request = request.into_inner();

         <span class="kw">let </span>old_output_file: TeaclaveOutputFile = <span class="self">self
             </span>.read_from_db(<span class="kw-2">&amp;</span>request.data_id.try_into().map_err(tonic_error)<span class="question-mark">?</span>)
             .<span class="kw">await
             </span>.map_err(|<span class="kw">_</span>| ManagementServiceError::InvalidDataId)<span class="question-mark">?</span>;

         <span class="macro">ensure!</span>(
             old_output_file.owner == OwnerList::from(<span class="macro">vec!</span>[user_id]),
             ManagementServiceError::PermissionDenied
         );

         <span class="kw">let </span>output_file = TeaclaveOutputFile::new(
             Url::parse(<span class="kw-2">&amp;</span>request.url).map_err(tonic_error)<span class="question-mark">?</span>,
             old_output_file.crypto_info,
             old_output_file.owner,
         );

         <span class="self">self</span>.write_to_db(<span class="kw-2">&amp;</span>output_file).<span class="kw">await</span><span class="question-mark">?</span>;

         <span class="kw">let </span>response = UpdateOutputFileResponse::new(output_file.external_id());
         <span class="prelude-val">Ok</span>(Response::new(response))
     }

     <span class="comment">// access control: user_id in owner_list
     </span><span class="kw">async fn </span>register_fusion_output(
         <span class="kw-2">&amp;</span><span class="self">self</span>,
         request: Request&lt;RegisterFusionOutputRequest&gt;,
     ) -&gt; TeaclaveServiceResponseResult&lt;RegisterFusionOutputResponse&gt; {
         <span class="kw">let </span>user_id = get_request_user_id(<span class="kw-2">&amp;</span>request)<span class="question-mark">?</span>.to_string();

         <span class="kw">let </span>owner_list = request.into_inner().owner_list;
         <span class="macro">ensure!</span>(
             owner_list.len() &gt; <span class="number">1 </span>&amp;&amp; owner_list.contains(<span class="kw-2">&amp;</span>user_id),
             ManagementServiceError::PermissionDenied
         );

         <span class="kw">let </span>output_file = create_fusion_data(owner_list).map_err(tonic_error)<span class="question-mark">?</span>;

         <span class="self">self</span>.write_to_db(<span class="kw-2">&amp;</span>output_file).<span class="kw">await</span><span class="question-mark">?</span>;

         <span class="kw">let </span>response = RegisterFusionOutputResponse::new(output_file.external_id());
         <span class="prelude-val">Ok</span>(Response::new(response))
     }

     <span class="comment">// access control:
     // 1) user_id in output.owner
     // 2) cmac != none
     </span><span class="kw">async fn </span>register_input_from_output(
         <span class="kw-2">&amp;</span><span class="self">self</span>,
         request: Request&lt;RegisterInputFromOutputRequest&gt;,
     ) -&gt; TeaclaveServiceResponseResult&lt;RegisterInputFromOutputResponse&gt; {
         <span class="kw">let </span>user_id = get_request_user_id(<span class="kw-2">&amp;</span>request)<span class="question-mark">?</span>;
         <span class="kw">let </span>data_id = request
             .into_inner()
             .data_id
             .try_into()
             .map_err(|<span class="kw">_</span>| ManagementServiceError::InvalidDataId)<span class="question-mark">?</span>;
         <span class="kw">let </span>output: TeaclaveOutputFile = <span class="self">self
             </span>.read_from_db(<span class="kw-2">&amp;</span>data_id)
             .<span class="kw">await
             </span>.map_err(|<span class="kw">_</span>| ManagementServiceError::InvalidDataId)<span class="question-mark">?</span>;

         <span class="macro">ensure!</span>(
             output.owner.contains(<span class="kw-2">&amp;</span>user_id),
             ManagementServiceError::PermissionDenied
         );

         <span class="kw">let </span>input = TeaclaveInputFile::from_output(output)
             .map_err(|<span class="kw">_</span>| ManagementServiceError::InvalidOutputFile)<span class="question-mark">?</span>;

         <span class="self">self</span>.write_to_db(<span class="kw-2">&amp;</span>input).<span class="kw">await</span><span class="question-mark">?</span>;

         <span class="kw">let </span>response = RegisterInputFromOutputResponse::new(input.external_id());
         <span class="prelude-val">Ok</span>(Response::new(response))
     }

     <span class="comment">// access control: output_file.owner contains user_id
     </span><span class="kw">async fn </span>get_output_file(
         <span class="kw-2">&amp;</span><span class="self">self</span>,
         request: Request&lt;GetOutputFileRequest&gt;,
     ) -&gt; TeaclaveServiceResponseResult&lt;GetOutputFileResponse&gt; {
         <span class="kw">let </span>user_id = get_request_user_id(<span class="kw-2">&amp;</span>request)<span class="question-mark">?</span>;
         <span class="kw">let </span>data_id = request
             .into_inner()
             .data_id
             .try_into()
             .map_err(|<span class="kw">_</span>| ManagementServiceError::InvalidDataId)<span class="question-mark">?</span>;
         <span class="kw">let </span>output_file: TeaclaveOutputFile = <span class="self">self
             </span>.read_from_db(<span class="kw-2">&amp;</span>data_id)
             .<span class="kw">await
             </span>.map_err(|<span class="kw">_</span>| ManagementServiceError::InvalidDataId)<span class="question-mark">?</span>;

         <span class="macro">ensure!</span>(
             output_file.owner.contains(<span class="kw-2">&amp;</span>user_id),
             ManagementServiceError::PermissionDenied
         );

         <span class="kw">let </span>response = GetOutputFileResponse::new(output_file.owner, output_file.cmac);
         <span class="prelude-val">Ok</span>(Response::new(response))
     }

     <span class="comment">// access control: input_file.owner contains user_id
     </span><span class="kw">async fn </span>get_input_file(
         <span class="kw-2">&amp;</span><span class="self">self</span>,
         request: Request&lt;GetInputFileRequest&gt;,
     ) -&gt; TeaclaveServiceResponseResult&lt;GetInputFileResponse&gt; {
         <span class="kw">let </span>user_id = get_request_user_id(<span class="kw-2">&amp;</span>request)<span class="question-mark">?</span>;
         <span class="kw">let </span>data_id = request
             .into_inner()
             .data_id
             .try_into()
             .map_err(|<span class="kw">_</span>| ManagementServiceError::InvalidDataId)<span class="question-mark">?</span>;
         <span class="kw">let </span>input_file: TeaclaveInputFile = <span class="self">self
             </span>.read_from_db(<span class="kw-2">&amp;</span>data_id)
             .<span class="kw">await
             </span>.map_err(|<span class="kw">_</span>| ManagementServiceError::InvalidDataId)<span class="question-mark">?</span>;

         <span class="macro">ensure!</span>(
             input_file.owner.contains(<span class="kw-2">&amp;</span>user_id),
             ManagementServiceError::PermissionDenied
         );

         <span class="kw">let </span>response = GetInputFileResponse::new(input_file.owner, input_file.cmac);
         <span class="prelude-val">Ok</span>(Response::new(response))
     }

     <span class="comment">// access_control: none
     </span><span class="kw">async fn </span>register_function(
         <span class="kw-2">&amp;</span><span class="self">self</span>,
         request: Request&lt;RegisterFunctionRequest&gt;,
     ) -&gt; TeaclaveServiceResponseResult&lt;RegisterFunctionResponse&gt; {
         <span class="kw">let </span>user_id = get_request_user_id(<span class="kw-2">&amp;</span>request)<span class="question-mark">?</span>;

         <span class="kw">let </span>function = FunctionBuilder::try_from(request.into_inner())
             .map_err(tonic_error)<span class="question-mark">?
             </span>.id(Uuid::new_v4())
             .owner(user_id.clone())
             .build();

         <span class="self">self</span>.write_to_db(<span class="kw-2">&amp;</span>function).<span class="kw">await</span><span class="question-mark">?</span>;

         <span class="kw">let </span><span class="kw-2">mut </span>u = User {
             id: user_id,
             ..Default::default()
         };
         <span class="kw">let </span>external_id = u.external_id();

         <span class="kw">let </span>user = <span class="self">self</span>.read_from_db::&lt;User&gt;(<span class="kw-2">&amp;</span>external_id).<span class="kw">await</span>;
         <span class="kw">match </span>user {
             <span class="prelude-val">Ok</span>(<span class="kw-2">mut </span>us) =&gt; {
                 us.registered_functions
                     .push(function.external_id().to_string());
                 <span class="self">self</span>.write_to_db(<span class="kw-2">&amp;</span>us).<span class="kw">await</span><span class="question-mark">?</span>;
             }
             <span class="prelude-val">Err</span>(<span class="kw">_</span>) =&gt; {
                 u.registered_functions
                     .push(function.external_id().to_string());
                 <span class="self">self</span>.write_to_db(<span class="kw-2">&amp;</span>u).<span class="kw">await</span><span class="question-mark">?</span>;
             }
         }

         <span class="comment">// Update allowed function list for users
         </span><span class="kw">for </span>user_id <span class="kw">in </span><span class="kw-2">&amp;</span>function.user_allowlist {
             <span class="kw">let </span><span class="kw-2">mut </span>u = User {
                 id: user_id.into(),
                 ..Default::default()
             };
             <span class="kw">let </span>external_id = u.external_id();
             <span class="kw">let </span>user = <span class="self">self</span>.read_from_db::&lt;User&gt;(<span class="kw-2">&amp;</span>external_id).<span class="kw">await</span>;
             <span class="kw">match </span>user {
                 <span class="prelude-val">Ok</span>(<span class="kw-2">mut </span>us) =&gt; {
                     us.allowed_functions
                         .push(function.external_id().to_string());
                     <span class="self">self</span>.write_to_db(<span class="kw-2">&amp;</span>us).<span class="kw">await</span><span class="question-mark">?</span>;
                 }
                 <span class="prelude-val">Err</span>(<span class="kw">_</span>) =&gt; {
                     u.allowed_functions.push(function.external_id().to_string());
                     <span class="self">self</span>.write_to_db(<span class="kw-2">&amp;</span>u).<span class="kw">await</span><span class="question-mark">?</span>;
                 }
             }
         }

         <span class="kw">let </span>usage = FunctionUsage {
             function_id: function.id,
             ..Default::default()
         };
         <span class="self">self</span>.write_to_db(<span class="kw-2">&amp;</span>usage).<span class="kw">await</span><span class="question-mark">?</span>;

         <span class="kw">let </span>response = RegisterFunctionResponse::new(function.external_id());
         <span class="prelude-val">Ok</span>(Response::new(response))
     }

     <span class="kw">async fn </span>update_function(
         <span class="kw-2">&amp;</span><span class="self">self</span>,
         request: Request&lt;UpdateFunctionRequest&gt;,
     ) -&gt; TeaclaveServiceResponseResult&lt;UpdateFunctionResponse&gt; {
         <span class="kw">let </span>user_id = get_request_user_id(<span class="kw-2">&amp;</span>request)<span class="question-mark">?</span>;

         <span class="kw">let </span>function = FunctionBuilder::try_from(request.into_inner())
             .map_err(tonic_error)<span class="question-mark">?
             </span>.owner(user_id)
             .build();

         <span class="self">self</span>.write_to_db(<span class="kw-2">&amp;</span>function).<span class="kw">await</span><span class="question-mark">?</span>;

         <span class="kw">let </span>response = UpdateFunctionResponse::new(function.external_id());
         <span class="prelude-val">Ok</span>(Response::new(response))
     }

     <span class="comment">// access control: function.public || function.owner == user_id || request.role == PlatformAdmin
     </span><span class="kw">async fn </span>get_function(
         <span class="kw-2">&amp;</span><span class="self">self</span>,
         request: Request&lt;GetFunctionRequest&gt;,
     ) -&gt; TeaclaveServiceResponseResult&lt;GetFunctionResponse&gt; {
         <span class="kw">let </span>user_id = get_request_user_id(<span class="kw-2">&amp;</span>request)<span class="question-mark">?</span>;
         <span class="kw">let </span>role = get_request_role(<span class="kw-2">&amp;</span>request)<span class="question-mark">?</span>;
         <span class="kw">let </span>function_id = request
             .into_inner()
             .function_id
             .try_into()
             .map_err(|<span class="kw">_</span>| ManagementServiceError::InvalidFunctionId)<span class="question-mark">?</span>;
         <span class="kw">let </span>function: Function = <span class="self">self
             </span>.read_from_db(<span class="kw-2">&amp;</span>function_id)
             .<span class="kw">await
             </span>.map_err(|<span class="kw">_</span>| ManagementServiceError::InvalidFunctionId)<span class="question-mark">?</span>;

         <span class="kw">if </span>function.public || role == UserRole::PlatformAdmin || function.owner == user_id {
             <span class="kw">let </span>response = GetFunctionResponse {
                 name: function.name,
                 description: function.description,
                 owner: function.owner.to_string(),
                 executor_type: function.executor_type.to_string(),
                 payload: function.payload,
                 public: function.public,
                 arguments: function.arguments.into_iter().map(|x| x.into()).collect(),
                 inputs: function.inputs.into_iter().map(|x| x.into()).collect(),
                 outputs: function.outputs.into_iter().map(|x| x.into()).collect(),
                 user_allowlist: function.user_allowlist,
             };

             <span class="prelude-val">Ok</span>(Response::new(response))
         } <span class="kw">else if </span>!function.public &amp;&amp; function.user_allowlist.contains(<span class="kw-2">&amp;</span>user_id.into()) {
             <span class="kw">let </span>response = GetFunctionResponse {
                 name: function.name,
                 description: function.description,
                 owner: function.owner.to_string(),
                 executor_type: function.executor_type.to_string(),
                 payload: <span class="macro">vec!</span>[],
                 public: function.public,
                 arguments: function.arguments.into_iter().map(|x| x.into()).collect(),
                 inputs: function.inputs.into_iter().map(|x| x.into()).collect(),
                 outputs: function.outputs.into_iter().map(|x| x.into()).collect(),
                 user_allowlist: <span class="macro">vec!</span>[],
             };

             <span class="prelude-val">Ok</span>(Response::new(response))
         } <span class="kw">else </span>{
             <span class="prelude-val">Err</span>(ManagementServiceError::PermissionDenied.into())
         }
     }

     <span class="comment">// access control:
     // function.public || request.role == PlatformAdmin || requested user_id in the user_allowlist
     </span><span class="kw">async fn </span>get_function_usage_stats(
         <span class="kw-2">&amp;</span><span class="self">self</span>,
         request: Request&lt;GetFunctionUsageStatsRequest&gt;,
     ) -&gt; TeaclaveServiceResponseResult&lt;GetFunctionUsageStatsResponse&gt; {
         <span class="kw">let </span>user_id = get_request_user_id(<span class="kw-2">&amp;</span>request)<span class="question-mark">?</span>;
         <span class="kw">let </span>role = get_request_role(<span class="kw-2">&amp;</span>request)<span class="question-mark">?</span>;
         <span class="kw">let </span>function_id = request
             .into_inner()
             .function_id
             .try_into()
             .map_err(|<span class="kw">_</span>| ManagementServiceError::InvalidFunctionId)<span class="question-mark">?</span>;
         <span class="kw">let </span>function: Function = <span class="self">self
             </span>.read_from_db(<span class="kw-2">&amp;</span>function_id)
             .<span class="kw">await
             </span>.map_err(|<span class="kw">_</span>| ManagementServiceError::InvalidFunctionId)<span class="question-mark">?</span>;

         <span class="macro">ensure!</span>(
             function.public
                 || role == UserRole::PlatformAdmin
                 || function.user_allowlist.contains(<span class="kw-2">&amp;</span>user_id.to_string()),
             ManagementServiceError::PermissionDenied
         );

         <span class="kw">let </span>usage = FunctionUsage {
             function_id: function.id,
             ..Default::default()
         };
         <span class="kw">let </span>external_id = usage.external_id();
         <span class="kw">let </span>function_usage = <span class="self">self
             </span>.read_from_db::&lt;FunctionUsage&gt;(<span class="kw-2">&amp;</span>external_id)
             .<span class="kw">await
             </span>.map_err(|<span class="kw">_</span>| ManagementServiceError::InvalidFunctionId)<span class="question-mark">?</span>;
         <span class="kw">let </span>function_quota = function.usage_quota.unwrap_or(-<span class="number">1</span>);
         <span class="kw">let </span>response = GetFunctionUsageStatsResponse {
             function_quota,
             current_usage: function_usage.use_numbers,
         };
         <span class="prelude-val">Ok</span>(Response::new(response))
     }

     <span class="comment">// access control: function.owner == user_id
     </span><span class="kw">async fn </span>delete_function(
         <span class="kw-2">&amp;</span><span class="self">self</span>,
         request: Request&lt;DeleteFunctionRequest&gt;,
     ) -&gt; TeaclaveServiceResponseResult&lt;()&gt; {
         <span class="kw">let </span>user_id = get_request_user_id(<span class="kw-2">&amp;</span>request)<span class="question-mark">?</span>;
         <span class="kw">let </span>function_id = request
             .into_inner()
             .function_id
             .try_into()
             .map_err(|<span class="kw">_</span>| ManagementServiceError::InvalidFunctionId)<span class="question-mark">?</span>;
         <span class="kw">let </span>function: Function = <span class="self">self
             </span>.read_from_db(<span class="kw-2">&amp;</span>function_id)
             .<span class="kw">await
             </span>.map_err(|<span class="kw">_</span>| ManagementServiceError::InvalidFunctionId)<span class="question-mark">?</span>;

         <span class="macro">ensure!</span>(
             function.owner == user_id,
             ManagementServiceError::PermissionDenied
         );
         <span class="self">self</span>.delete_from_db(<span class="kw-2">&amp;</span>function_id)
             .<span class="kw">await
             </span>.map_err(|<span class="kw">_</span>| ManagementServiceError::InvalidFunctionId)<span class="question-mark">?</span>;

         <span class="prelude-val">Ok</span>(Response::new(()))
     }

     <span class="comment">// access control: function.owner == user_id
     // disable function
     // 1. `List functions` does not show this function
     // 2. `Create new task` with the function id fails
     </span><span class="kw">async fn </span>disable_function(
         <span class="kw-2">&amp;</span><span class="self">self</span>,
         request: Request&lt;DisableFunctionRequest&gt;,
     ) -&gt; TeaclaveServiceResponseResult&lt;()&gt; {
         <span class="kw">let </span>user_id = get_request_user_id(<span class="kw-2">&amp;</span>request)<span class="question-mark">?</span>;
         <span class="kw">let </span>role = get_request_role(<span class="kw-2">&amp;</span>request)<span class="question-mark">?</span>;
         <span class="kw">let </span>function_id = request
             .into_inner()
             .function_id
             .try_into()
             .map_err(|<span class="kw">_</span>| ManagementServiceError::InvalidFunctionId)<span class="question-mark">?</span>;
         <span class="kw">let </span><span class="kw-2">mut </span>function: Function = <span class="self">self
             </span>.read_from_db(<span class="kw-2">&amp;</span>function_id)
             .<span class="kw">await
             </span>.map_err(|<span class="kw">_</span>| ManagementServiceError::InvalidFunctionId)<span class="question-mark">?</span>;

         <span class="kw">if </span>role != UserRole::PlatformAdmin {
             <span class="macro">ensure!</span>(
                 function.owner == user_id,
                 ManagementServiceError::PermissionDenied
             );
         }
         <span class="kw">let </span>func_id = function.external_id().to_string();

         <span class="comment">// Updated function owner
         </span><span class="kw">let </span>u = User {
             id: function.owner.clone(),
             ..Default::default()
         };
         <span class="kw">let </span>external_id = u.external_id();
         <span class="kw">let </span>user = <span class="self">self</span>.read_from_db::&lt;User&gt;(<span class="kw-2">&amp;</span>external_id).<span class="kw">await</span>;
         <span class="kw">if let </span><span class="prelude-val">Ok</span>(<span class="kw-2">mut </span>us) = user {
             us.allowed_functions.retain(|f| !f.eq(<span class="kw-2">&amp;</span>func_id));
             us.registered_functions.retain(|f| !f.eq(<span class="kw-2">&amp;</span>func_id));
             <span class="self">self</span>.write_to_db(<span class="kw-2">&amp;</span>us).<span class="kw">await</span><span class="question-mark">?</span>;
         } <span class="kw">else </span>{
             <span class="macro">log::warn!</span>(<span class="string">&quot;Invalid user id from functions&quot;</span>);
         }

         <span class="comment">// Update allowed function list for users
         </span><span class="kw">for </span>user_id <span class="kw">in </span><span class="kw-2">&amp;</span>function.user_allowlist {
             <span class="kw">let </span>u = User {
                 id: user_id.into(),
                 ..Default::default()
             };
             <span class="kw">let </span>external_id = u.external_id();
             <span class="kw">let </span>user = <span class="self">self</span>.read_from_db::&lt;User&gt;(<span class="kw-2">&amp;</span>external_id).<span class="kw">await</span>;
             <span class="kw">if let </span><span class="prelude-val">Ok</span>(<span class="kw-2">mut </span>us) = user {
                 us.allowed_functions.retain(|f| !f.eq(<span class="kw-2">&amp;</span>func_id));
                 us.registered_functions.retain(|f| !f.eq(<span class="kw-2">&amp;</span>func_id));
                 <span class="self">self</span>.write_to_db(<span class="kw-2">&amp;</span>us).<span class="kw">await</span><span class="question-mark">?</span>;
             } <span class="kw">else </span>{
                 <span class="macro">log::warn!</span>(<span class="string">&quot;Invalid user id from functions&quot;</span>);
             }
         }

         function.user_allowlist.clear();
         <span class="self">self</span>.write_to_db(<span class="kw-2">&amp;</span>function).<span class="kw">await</span><span class="question-mark">?</span>;

         <span class="prelude-val">Ok</span>(Response::new(()))
     }

     <span class="comment">// access contro: user_id = request.user_id
     </span><span class="kw">async fn </span>list_functions(
         <span class="kw-2">&amp;</span><span class="self">self</span>,
         request: Request&lt;ListFunctionsRequest&gt;,
     ) -&gt; TeaclaveServiceResponseResult&lt;ListFunctionsResponse&gt; {
         <span class="kw">let </span><span class="kw-2">mut </span>request_user_id = request.get_ref().user_id.clone().into();

         <span class="kw">let </span>current_user_id = get_request_user_id(<span class="kw-2">&amp;</span>request)<span class="question-mark">?</span>;
         <span class="kw">let </span>role = get_request_role(<span class="kw-2">&amp;</span>request)<span class="question-mark">?</span>;

         <span class="kw">if </span>role != UserRole::PlatformAdmin {
             <span class="macro">ensure!</span>(
                 request_user_id == current_user_id,
                 ManagementServiceError::PermissionDenied
             );
         }

         <span class="kw">if let </span>UserRole::DataOwner(s) = <span class="kw-2">&amp;</span>role {
             request_user_id = s.into();
         }

         <span class="kw">let </span>u = User {
             id: request_user_id,
             ..Default::default()
         };
         <span class="kw">let </span>external_id = u.external_id();

         <span class="kw">let </span>user = <span class="self">self</span>.read_from_db::&lt;User&gt;(<span class="kw-2">&amp;</span>external_id).<span class="kw">await</span>;
         <span class="kw">match </span>user {
             <span class="prelude-val">Ok</span>(us) =&gt; {
                 <span class="kw">let </span><span class="kw-2">mut </span>response = ListFunctionsResponse {
                     registered_functions: us.registered_functions,
                     allowed_functions: us.allowed_functions,
                 };
                 <span class="kw">if </span>role == UserRole::PlatformAdmin {
                     <span class="kw">let </span>allowed_functions = <span class="self">self
                         </span>.get_keys_by_prefix_from_db(Function::key_prefix())
                         .<span class="kw">await</span><span class="question-mark">?</span>;
                     response.allowed_functions = allowed_functions;
                 }

                 <span class="prelude-val">Ok</span>(Response::new(response))
             }
             <span class="prelude-val">Err</span>(<span class="kw">_</span>) =&gt; {
                 <span class="kw">let </span>response = ListFunctionsResponse::default();
                 <span class="prelude-val">Ok</span>(Response::new(response))
             }
         }
     }

     <span class="comment">// access control: none
     // when a task is created, following rules will be verified:
     // 1) arugments match function definition
     // 2) input files match function definition
     // 3) output files match function definition
     // 4) requested user_id in the user_allowlist
     </span><span class="kw">async fn </span>create_task(
         <span class="kw-2">&amp;</span><span class="self">self</span>,
         request: Request&lt;CreateTaskRequest&gt;,
     ) -&gt; TeaclaveServiceResponseResult&lt;CreateTaskResponse&gt; {
         <span class="kw">let </span>user_id = get_request_user_id(<span class="kw-2">&amp;</span>request)<span class="question-mark">?</span>;
         <span class="kw">let </span>role = get_request_role(<span class="kw-2">&amp;</span>request)<span class="question-mark">?</span>;

         <span class="kw">let </span>request = request.into_inner();
         <span class="kw">let </span>function_id = request
             .function_id
             .try_into()
             .map_err(|<span class="kw">_</span>| ManagementServiceError::InvalidFunctionId)<span class="question-mark">?</span>;

         <span class="kw">let </span>function: Function = <span class="self">self
             </span>.read_from_db(<span class="kw-2">&amp;</span>function_id)
             .<span class="kw">await
             </span>.map_err(|<span class="kw">_</span>| ManagementServiceError::InvalidFunctionId)<span class="question-mark">?</span>;

         <span class="kw">match </span>role {
             UserRole::DataOwner(a) | UserRole::DataOwnerManager(a) =&gt; {
                 <span class="macro">ensure!</span>(
                     (function.public || function.user_allowlist.contains(<span class="kw-2">&amp;</span>a)),
                     ManagementServiceError::PermissionDenied
                 );
             }
             UserRole::PlatformAdmin =&gt; (),
             <span class="kw">_ </span>=&gt; {
                 <span class="kw">return </span><span class="prelude-val">Err</span>(ManagementServiceError::PermissionDenied.into());
             }
         }
         <span class="kw">let </span>task = Task::&lt;Create&gt;::new(
             user_id,
             request.executor.try_into().map_err(tonic_error)<span class="question-mark">?</span>,
             request.function_arguments.try_into().map_err(tonic_error)<span class="question-mark">?</span>,
             from_proto_ownership(request.inputs_ownership),
             from_proto_ownership(request.outputs_ownership),
             function,
         )
         .map_err(|<span class="kw">_</span>| ManagementServiceError::InvalidTask)<span class="question-mark">?</span>;

         <span class="macro">log::debug!</span>(<span class="string">&quot;CreateTask: {:?}&quot;</span>, task);
         <span class="kw">let </span>ts: TaskState = task.into();
         <span class="self">self</span>.write_to_db(<span class="kw-2">&amp;</span>ts).<span class="kw">await</span><span class="question-mark">?</span>;

         <span class="kw">let </span>response = CreateTaskResponse::new(ts.external_id());
         <span class="prelude-val">Ok</span>(Response::new(response))
     }

     <span class="comment">// access control: task.participants.contains(&amp;user_id)
     </span><span class="kw">async fn </span>get_task(
         <span class="kw-2">&amp;</span><span class="self">self</span>,
         request: Request&lt;GetTaskRequest&gt;,
     ) -&gt; TeaclaveServiceResponseResult&lt;GetTaskResponse&gt; {
         <span class="kw">let </span>user_id = get_request_user_id(<span class="kw-2">&amp;</span>request)<span class="question-mark">?</span>;
         <span class="kw">let </span>task_id = request
             .into_inner()
             .task_id
             .try_into()
             .map_err(|<span class="kw">_</span>| ManagementServiceError::InvalidTaskId)<span class="question-mark">?</span>;
         <span class="kw">let </span>ts: TaskState = <span class="self">self
             </span>.read_from_db(<span class="kw-2">&amp;</span>task_id)
             .<span class="kw">await
             </span>.map_err(|<span class="kw">_</span>| ManagementServiceError::InvalidTaskId)<span class="question-mark">?</span>;

         <span class="macro">ensure!</span>(
             ts.has_participant(<span class="kw-2">&amp;</span>user_id),
             ManagementServiceError::PermissionDenied
         );

         <span class="macro">log::debug!</span>(<span class="string">&quot;GetTask: {:?}&quot;</span>, ts);

         <span class="kw">let </span>response = GetTaskResponse {
             task_id: ts.external_id().to_string(),
             creator: ts.creator.to_string(),
             function_id: ts.function_id.to_string(),
             function_owner: ts.function_owner.to_string(),
             function_arguments: ts.function_arguments.clone().into_string(),
             inputs_ownership: to_proto_ownership(ts.inputs_ownership.clone()),
             outputs_ownership: to_proto_ownership(ts.outputs_ownership.clone()),
             participants: ts.participants.clone().into(),
             approved_users: ts.approved_users.clone().into(),
             assigned_inputs: to_proto_file_ids(ts.assigned_inputs.external_ids()),
             assigned_outputs: to_proto_file_ids(ts.assigned_outputs.external_ids()),
             result: <span class="prelude-val">Some</span>(ts.result.into()),
             status: i32_from_task_status(ts.status),
         };
         <span class="prelude-val">Ok</span>(Response::new(response))
     }

     <span class="comment">// access control:
     // 1) task.participants.contains(user_id)
     // 2) task.status == Created
     // 3) user can use the data:
     //    * input file: user_id == input_file.owner contains user_id
     //    * output file: output_file.owner contains user_id &amp;&amp; output_file.cmac.is_none()
     // 4) the data can be assgined to the task:
     //    * inputs_ownership or outputs_ownership contains the data name
     //    * input file: OwnerList match input_file.owner
     //    * output file: OwnerList match output_file.owner
     </span><span class="kw">async fn </span>assign_data(
         <span class="kw-2">&amp;</span><span class="self">self</span>,
         request: Request&lt;AssignDataRequest&gt;,
     ) -&gt; TeaclaveServiceResponseResult&lt;()&gt; {
         <span class="kw">let </span>user_id = get_request_user_id(<span class="kw-2">&amp;</span>request)<span class="question-mark">?</span>;
         <span class="kw">let </span>request = request.into_inner();
         <span class="kw">let </span>task_id = request
             .task_id
             .try_into()
             .map_err(|<span class="kw">_</span>| ManagementServiceError::InvalidTaskId)<span class="question-mark">?</span>;

         <span class="kw">let </span>ts: TaskState = <span class="self">self
             </span>.read_from_db(<span class="kw-2">&amp;</span>task_id)
             .<span class="kw">await
             </span>.map_err(|<span class="kw">_</span>| ManagementServiceError::InvalidTaskId)<span class="question-mark">?</span>;

         <span class="macro">ensure!</span>(
             ts.has_participant(<span class="kw-2">&amp;</span>user_id),
             ManagementServiceError::PermissionDenied
         );

         <span class="kw">let </span><span class="kw-2">mut </span>task: Task&lt;Assign&gt; = ts.try_into().map_err(|e| {
             <span class="macro">log::warn!</span>(<span class="string">&quot;Assign state error: {:?}&quot;</span>, e);
             ManagementServiceError::TaskAssignDataError
         })<span class="question-mark">?</span>;
         <span class="kw">let </span>inputs = from_proto_file_ids(request.inputs).map_err(tonic_error)<span class="question-mark">?</span>;
         <span class="kw">for </span>(data_name, data_id) <span class="kw">in </span>inputs.iter() {
             <span class="kw">let </span>file: TeaclaveInputFile = <span class="self">self
                 </span>.read_from_db(data_id)
                 .<span class="kw">await
                 </span>.map_err(|<span class="kw">_</span>| ManagementServiceError::InvalidDataId)<span class="question-mark">?</span>;
             task.assign_input(<span class="kw-2">&amp;</span>user_id, data_name, file)
                 .map_err(|<span class="kw">_</span>| ManagementServiceError::PermissionDenied)<span class="question-mark">?</span>;
         }
         <span class="kw">let </span>outputs = from_proto_file_ids(request.outputs).map_err(tonic_error)<span class="question-mark">?</span>;
         <span class="kw">for </span>(data_name, data_id) <span class="kw">in </span>outputs.iter() {
             <span class="kw">let </span>file: TeaclaveOutputFile = <span class="self">self
                 </span>.read_from_db(data_id)
                 .<span class="kw">await
                 </span>.map_err(|<span class="kw">_</span>| ManagementServiceError::InvalidDataId)<span class="question-mark">?</span>;
             task.assign_output(<span class="kw-2">&amp;</span>user_id, data_name, file)
                 .map_err(|<span class="kw">_</span>| ManagementServiceError::PermissionDenied)<span class="question-mark">?</span>;
         }

         <span class="macro">log::debug!</span>(<span class="string">&quot;AssignData: {:?}&quot;</span>, task);

         <span class="kw">let </span>ts: TaskState = task.into();
         <span class="self">self</span>.write_to_db(<span class="kw-2">&amp;</span>ts).<span class="kw">await</span><span class="question-mark">?</span>;

         <span class="prelude-val">Ok</span>(Response::new(()))
     }

     <span class="comment">// access_control:
     // 1) task status == Ready
     // 2) user_id in task.participants
     </span><span class="kw">async fn </span>approve_task(
         <span class="kw-2">&amp;</span><span class="self">self</span>,
         request: Request&lt;ApproveTaskRequest&gt;,
     ) -&gt; TeaclaveServiceResponseResult&lt;()&gt; {
         <span class="kw">let </span>user_id = get_request_user_id(<span class="kw-2">&amp;</span>request)<span class="question-mark">?</span>;

         <span class="kw">let </span>task_id = request
             .into_inner()
             .task_id
             .try_into()
             .map_err(|<span class="kw">_</span>| ManagementServiceError::InvalidTaskId)<span class="question-mark">?</span>;

         <span class="kw">let </span>ts: TaskState = <span class="self">self
             </span>.read_from_db(<span class="kw-2">&amp;</span>task_id)
             .<span class="kw">await
             </span>.map_err(|<span class="kw">_</span>| ManagementServiceError::InvalidTaskId)<span class="question-mark">?</span>;

         <span class="kw">let </span><span class="kw-2">mut </span>task: Task&lt;Approve&gt; = ts.try_into().map_err(|e| {
             <span class="macro">log::warn!</span>(<span class="string">&quot;Approve state error: {:?}&quot;</span>, e);
             ManagementServiceError::TaskApproveError
         })<span class="question-mark">?</span>;

         task.approve(<span class="kw-2">&amp;</span>user_id)
             .map_err(|<span class="kw">_</span>| ManagementServiceError::PermissionDenied)<span class="question-mark">?</span>;

         <span class="macro">log::debug!</span>(<span class="string">&quot;ApproveTask: approve:{:?}&quot;</span>, task);

         <span class="kw">let </span>ts: TaskState = task.into();
         <span class="self">self</span>.write_to_db(<span class="kw-2">&amp;</span>ts).<span class="kw">await</span><span class="question-mark">?</span>;

         <span class="prelude-val">Ok</span>(Response::new(()))
     }

     <span class="comment">// access_control:
     // 1) task status == Approved
     // 2) user_id == task.creator
     </span><span class="kw">async fn </span>invoke_task(
         <span class="kw-2">&amp;</span><span class="self">self</span>,
         request: Request&lt;InvokeTaskRequest&gt;,
     ) -&gt; TeaclaveServiceResponseResult&lt;()&gt; {
         <span class="kw">let </span>user_id = get_request_user_id(<span class="kw-2">&amp;</span>request)<span class="question-mark">?</span>;
         <span class="kw">let </span>task_id = request
             .into_inner()
             .task_id
             .try_into()
             .map_err(|<span class="kw">_</span>| ManagementServiceError::InvalidTaskId)<span class="question-mark">?</span>;

         <span class="kw">let </span>ts: TaskState = <span class="self">self
             </span>.read_from_db(<span class="kw-2">&amp;</span>task_id)
             .<span class="kw">await
             </span>.map_err(|<span class="kw">_</span>| ManagementServiceError::InvalidTaskId)<span class="question-mark">?</span>;

         <span class="comment">// Early validation
         </span><span class="macro">ensure!</span>(
             ts.has_creator(<span class="kw-2">&amp;</span>user_id),
             ManagementServiceError::PermissionDenied
         );

         <span class="kw">let </span>function: Function = <span class="self">self
             </span>.read_from_db(<span class="kw-2">&amp;</span>ts.function_id)
             .<span class="kw">await
             </span>.map_err(|<span class="kw">_</span>| ManagementServiceError::InvalidFunctionId)<span class="question-mark">?</span>;

         <span class="macro">log::debug!</span>(<span class="string">&quot;InvokeTask: get function: {:?}&quot;</span>, function);

         <span class="kw">let </span>usage = FunctionUsage {
             function_id: function.id,
             ..Default::default()
         };
         <span class="kw">let </span>external_id = usage.external_id();
         <span class="kw">let </span><span class="kw-2">mut </span>function_usage = <span class="self">self
             </span>.read_from_db::&lt;FunctionUsage&gt;(<span class="kw-2">&amp;</span>external_id)
             .<span class="kw">await
             </span>.map_err(|<span class="kw">_</span>| ManagementServiceError::InvalidFunctionId)<span class="question-mark">?</span>;
         <span class="kw">let </span>function_current_use_numbers = function_usage.use_numbers;

         <span class="kw">if let </span><span class="prelude-val">Some</span>(quota) = function.usage_quota {
             <span class="kw">if </span>quota &lt;= function_current_use_numbers {
                 <span class="kw">return </span><span class="prelude-val">Err</span>(ManagementServiceError::FunctionQuotaError.into());
             }
         }

         <span class="kw">let </span><span class="kw-2">mut </span>task: Task&lt;Stage&gt; = ts.try_into().map_err(|e| {
             <span class="macro">log::warn!</span>(<span class="string">&quot;Stage state error: {:?}&quot;</span>, e);
             ManagementServiceError::TaskInvokeError
         })<span class="question-mark">?</span>;

         <span class="macro">log::debug!</span>(<span class="string">&quot;InvokeTask: get task: {:?}&quot;</span>, task);
         <span class="kw">let </span>staged_task = task
             .stage_for_running(<span class="kw-2">&amp;</span>user_id, function)
             .map_err(|<span class="kw">_</span>| ManagementServiceError::PermissionDenied)<span class="question-mark">?</span>;
         <span class="macro">log::debug!</span>(<span class="string">&quot;InvokeTask: staged task: {:?}&quot;</span>, staged_task);
         <span class="self">self</span>.enqueue_to_db(StagedTask::get_queue_key().as_bytes(), <span class="kw-2">&amp;</span>staged_task)
             .<span class="kw">await</span><span class="question-mark">?</span>;

         <span class="kw">let </span>ts: TaskState = task.into();
         <span class="self">self</span>.write_to_db(<span class="kw-2">&amp;</span>ts).<span class="kw">await</span><span class="question-mark">?</span>;

         function_usage.use_numbers = function_current_use_numbers + <span class="number">1</span>;
         <span class="self">self</span>.write_to_db(<span class="kw-2">&amp;</span>function_usage).<span class="kw">await</span><span class="question-mark">?</span>;
         <span class="prelude-val">Ok</span>(Response::new(()))
     }

     <span class="comment">// access_control:
     // 1) user_id == task.creator
     // 2) user_role == admin
     </span><span class="kw">async fn </span>cancel_task(
         <span class="kw-2">&amp;</span><span class="self">self</span>,
         request: Request&lt;CancelTaskRequest&gt;,
     ) -&gt; TeaclaveServiceResponseResult&lt;()&gt; {
         <span class="kw">let </span>user_id = get_request_user_id(<span class="kw-2">&amp;</span>request)<span class="question-mark">?</span>;
         <span class="kw">let </span>role = get_request_role(<span class="kw-2">&amp;</span>request)<span class="question-mark">?</span>;
         <span class="kw">let </span>task_id = request
             .into_inner()
             .task_id
             .try_into()
             .map_err(|<span class="kw">_</span>| ManagementServiceError::InvalidTaskId)<span class="question-mark">?</span>;
         <span class="kw">let </span>ts: TaskState = <span class="self">self
             </span>.read_from_db(<span class="kw-2">&amp;</span>task_id)
             .<span class="kw">await
             </span>.map_err(|<span class="kw">_</span>| ManagementServiceError::InvalidTaskId)<span class="question-mark">?</span>;

         <span class="kw">match </span>role {
             UserRole::PlatformAdmin =&gt; {}
             <span class="kw">_ </span>=&gt; {
                 <span class="macro">ensure!</span>(
                     ts.has_creator(<span class="kw-2">&amp;</span>user_id),
                     ManagementServiceError::PermissionDenied
                 );
             }
         }

         <span class="kw">match </span>ts.status {
             <span class="comment">// need scheduler to cancel the task
             </span>TaskStatus::Staged | TaskStatus::Running =&gt; {
                 <span class="self">self</span>.enqueue_to_db(CANCEL_QUEUE_KEY.as_bytes(), <span class="kw-2">&amp;</span>ts).<span class="kw">await</span><span class="question-mark">?</span>;
             }
             <span class="kw">_ </span>=&gt; {
                 <span class="comment">// early cancelation
                 // race will not affect correctness/privacy
                 </span><span class="kw">let </span><span class="kw-2">mut </span>task: Task&lt;Cancel&gt; = ts.try_into().map_err(|e| {
                     <span class="macro">log::warn!</span>(<span class="string">&quot;Cancel state error: {:?}&quot;</span>, e);
                     ManagementServiceError::TaskCancelError(
                         <span class="string">&quot;task has already been canceled&quot;</span>.to_string(),
                     )
                 })<span class="question-mark">?</span>;

                 <span class="macro">log::debug!</span>(<span class="string">&quot;Canceled Task: {:?}&quot;</span>, task);

                 task.update_result(TaskResult::Err(TaskFailure {
                     reason: <span class="string">&quot;Task canceled&quot;</span>.to_string(),
                 }))
                 .map_err(|<span class="kw">_</span>| {
                     ManagementServiceError::TaskCancelError(<span class="string">&quot;cannot update result&quot;</span>.to_string())
                 })<span class="question-mark">?</span>;
                 <span class="kw">let </span>ts: TaskState = task.into();
                 <span class="self">self</span>.write_to_db(<span class="kw-2">&amp;</span>ts).<span class="kw">await</span><span class="question-mark">?</span>;

                 <span class="macro">log::warn!</span>(<span class="string">&quot;Canceled Task: writtenback&quot;</span>);
             }
         }

         <span class="prelude-val">Ok</span>(Response::new(()))
     }

     <span class="comment">// access_control: none
     </span><span class="kw">async fn </span>save_logs(
         <span class="kw-2">&amp;</span><span class="self">self</span>,
         request: Request&lt;SaveLogsRequest&gt;,
     ) -&gt; TeaclaveServiceResponseResult&lt;()&gt; {
         <span class="kw">let </span>request = request.into_inner();

         <span class="kw">let </span>entries: <span class="prelude-ty">Result</span>&lt;Vec&lt;Entry&gt;&gt; = request.logs.into_iter().map(Entry::try_from).collect();
         <span class="kw">let </span>logs = entries.map_err(|e| {
             <span class="kw">let </span>err_msg = <span class="macro">format!</span>(<span class="string">&quot;failed to transform entries {:?}&quot;</span>, e);
             ManagementServiceError::AuditError(err_msg)
         })<span class="question-mark">?</span>;

         <span class="kw">let </span>auditor = <span class="self">self</span>.auditor.clone();
         task::spawn_blocking(<span class="kw">move </span>|| auditor.add_logs(logs))
             .<span class="kw">await
             </span>.map_err(|e| <span class="macro">anyhow!</span>(<span class="string">&quot;{}&quot;</span>, e.to_string()))
             .flatten()
             .map_err(|e| {
                 <span class="kw">let </span>err_msg = <span class="macro">format!</span>(<span class="string">&quot;failed to save logs {:?}&quot;</span>, e);
                 ManagementServiceError::AuditError(err_msg)
             })<span class="question-mark">?</span>;

         <span class="prelude-val">Ok</span>(Response::new(()))
     }

     <span class="comment">// access_control: only
     // user_role == admin
     </span><span class="kw">async fn </span>query_audit_logs(
         <span class="kw-2">&amp;</span><span class="self">self</span>,
         request: Request&lt;QueryAuditLogsRequest&gt;,
     ) -&gt; TeaclaveServiceResponseResult&lt;QueryAuditLogsResponse&gt; {
         <span class="kw">let </span>role = get_request_role(<span class="kw-2">&amp;</span>request)<span class="question-mark">?</span>;
         <span class="macro">ensure!</span>(
             role == UserRole::PlatformAdmin,
             ManagementServiceError::PermissionDenied
         );

         <span class="kw">let </span>request = request.into_inner();
         <span class="kw">let </span>auditor = <span class="self">self</span>.auditor.clone();
         <span class="kw">let </span>logs = task::spawn_blocking(<span class="kw">move </span>|| {
             auditor.query_logs(<span class="kw-2">&amp;</span>request.query, request.limit <span class="kw">as </span>usize)
         })
         .<span class="kw">await
         </span>.map_err(|e| <span class="macro">anyhow!</span>(<span class="string">&quot;{}&quot;</span>, e.to_string()))
         .flatten()
         .map_err(|e| {
             <span class="kw">let </span>err_msg = <span class="macro">format!</span>(<span class="string">&quot;failed to query logs {:?}&quot;</span>, e);
             ManagementServiceError::AuditError(err_msg)
         })<span class="question-mark">?</span>;

         <span class="kw">let </span>response = QueryAuditLogsResponse::new(logs);
         <span class="prelude-val">Ok</span>(Response::new(response))
     }
 }

 <span class="kw">impl </span>TeaclaveManagementService {
     <span class="kw">pub</span>(<span class="kw">crate</span>) <span class="kw">async fn </span>new(storage_service_endpoint: Endpoint) -&gt; anyhow::Result&lt;<span class="self">Self</span>&gt; {
         <span class="kw">let </span>channel = storage_service_endpoint
             .connect()
             .<span class="kw">await
             </span>.map_err(|e| <span class="macro">anyhow!</span>(<span class="string">&quot;Failed to connect to storage service, {:?}&quot;</span>, e))<span class="question-mark">?</span>;
         <span class="kw">let </span>storage_client = Arc::new(Mutex::new(TeaclaveStorageClient::new(channel)));
         <span class="kw">let </span>client_clone = storage_client.clone();
         <span class="kw">let </span>auditor = task::spawn_blocking(<span class="kw">move </span>|| Auditor::try_new(client_clone)).<span class="kw">await</span><span class="question-mark">??</span>;
         <span class="kw">let </span>service = <span class="self">Self </span>{
             storage_client,
             auditor,
         };

         <span class="attribute">#[cfg(test_mode)]
         </span>service.add_mock_data().<span class="kw">await</span><span class="question-mark">?</span>;

         <span class="prelude-val">Ok</span>(service)
     }

     <span class="kw">async fn </span>write_to_db(<span class="kw-2">&amp;</span><span class="self">self</span>, item: <span class="kw-2">&amp;</span><span class="kw">impl </span>Storable) -&gt; <span class="prelude-ty">Result</span>&lt;(), ManagementServiceError&gt; {
         <span class="kw">let </span>k = item.key();
         <span class="kw">let </span>v = item.to_vec()<span class="question-mark">?</span>;
         <span class="kw">let </span>put_request = PutRequest::new(k.as_slice(), v.as_slice());
         <span class="kw">let </span>_put_response = <span class="self">self
             </span>.storage_client
             .clone()
             .lock()
             .<span class="kw">await
             </span>.put(put_request)
             .<span class="kw">await
             </span>.map_err(|e| ManagementServiceError::Service(e.into()))<span class="question-mark">?</span>;
         <span class="prelude-val">Ok</span>(())
     }

     <span class="kw">async fn </span>read_from_db&lt;T: Storable&gt;(
         <span class="kw-2">&amp;</span><span class="self">self</span>,
         key: <span class="kw-2">&amp;</span>ExternalID,
     ) -&gt; <span class="prelude-ty">Result</span>&lt;T, ManagementServiceError&gt; {
         <span class="macro">ensure!</span>(
             T::match_prefix(<span class="kw-2">&amp;</span>key.prefix),
             <span class="macro">anyhow!</span>(<span class="string">&quot;key prefix doesn&#39;t match&quot;</span>)
         );

         <span class="kw">let </span>request = GetRequest::new(key.to_bytes());
         <span class="kw">let </span>response = <span class="self">self
             </span>.storage_client
             .clone()
             .lock()
             .<span class="kw">await
             </span>.get(request)
             .<span class="kw">await
             </span>.map_err(|e| ManagementServiceError::Service(e.into()))<span class="question-mark">?
             </span>.into_inner();
         T::from_slice(response.value.as_slice()).map_err(ManagementServiceError::Service)
     }

     <span class="kw">async fn </span>get_keys_by_prefix_from_db(
         <span class="kw-2">&amp;</span><span class="self">self</span>,
         prefix: <span class="kw">impl </span>Into&lt;Vec&lt;u8&gt;&gt;,
     ) -&gt; <span class="prelude-ty">Result</span>&lt;Vec&lt;String&gt;, ManagementServiceError&gt; {
         <span class="kw">let </span>request = GetKeysByPrefixRequest::new(prefix.into());
         <span class="kw">let </span>response = <span class="self">self
             </span>.storage_client
             .clone()
             .lock()
             .<span class="kw">await
             </span>.get_keys_by_prefix(request)
             .<span class="kw">await
             </span>.map_err(|e| ManagementServiceError::Service(e.into()))<span class="question-mark">?</span>;
         <span class="prelude-val">Ok</span>(response
             .into_inner()
             .keys
             .into_iter()
             .map(String::from_utf8)
             .collect::&lt;<span class="prelude-ty">Result</span>&lt;Vec&lt;<span class="kw">_</span>&gt;, <span class="kw">_</span>&gt;&gt;()
             .map_err(|<span class="kw">_</span>| <span class="macro">anyhow!</span>(<span class="string">&quot;cannot convert keys&quot;</span>))<span class="question-mark">?</span>)
     }

     <span class="kw">async fn </span>delete_from_db(<span class="kw-2">&amp;</span><span class="self">self</span>, key: <span class="kw-2">&amp;</span>ExternalID) -&gt; <span class="prelude-ty">Result</span>&lt;(), ManagementServiceError&gt; {
         <span class="kw">let </span>request = DeleteRequest::new(key.to_bytes());
         <span class="self">self</span>.storage_client
             .clone()
             .lock()
             .<span class="kw">await
             </span>.delete(request)
             .<span class="kw">await
             </span>.map_err(|e| ManagementServiceError::Service(e.into()))<span class="question-mark">?</span>;
         <span class="prelude-val">Ok</span>(())
     }

     <span class="kw">async fn </span>enqueue_to_db(
         <span class="kw-2">&amp;</span><span class="self">self</span>,
         key: <span class="kw-2">&amp;</span>[u8],
         item: <span class="kw-2">&amp;</span><span class="kw">impl </span>Storable,
     ) -&gt; <span class="prelude-ty">Result</span>&lt;(), ManagementServiceError&gt; {
         <span class="kw">let </span>value = item.to_vec()<span class="question-mark">?</span>;
         <span class="kw">let </span>enqueue_request = EnqueueRequest::new(key, value);
         <span class="kw">let </span>_enqueue_response = <span class="self">self
             </span>.storage_client
             .clone()
             .lock()
             .<span class="kw">await
             </span>.enqueue(enqueue_request)
             .<span class="kw">await
             </span>.map_err(|e| ManagementServiceError::Service(e.into()))<span class="question-mark">?</span>;
         <span class="prelude-val">Ok</span>(())
     }

     <span class="attribute">#[cfg(test_mode)]
     </span><span class="kw">async fn </span>add_mock_data(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; anyhow::Result&lt;()&gt; {
         <span class="kw">let </span><span class="kw-2">mut </span>output_file = create_fusion_data(<span class="macro">vec!</span>[<span class="string">&quot;mock_user1&quot;</span>, <span class="string">&quot;frontend_user&quot;</span>])<span class="question-mark">?</span>;
         output_file.uuid = Uuid::parse_str(<span class="string">&quot;00000000-0000-0000-0000-000000000001&quot;</span>)<span class="question-mark">?</span>;
         output_file.cmac = <span class="prelude-val">Some</span>(FileAuthTag::mock());
         <span class="self">self</span>.write_to_db(<span class="kw-2">&amp;</span>output_file).<span class="kw">await</span><span class="question-mark">?</span>;

         <span class="kw">let </span><span class="kw-2">mut </span>output_file = create_fusion_data(<span class="macro">vec!</span>[<span class="string">&quot;mock_user2&quot;</span>, <span class="string">&quot;mock_user3&quot;</span>])<span class="question-mark">?</span>;
         output_file.uuid = Uuid::parse_str(<span class="string">&quot;00000000-0000-0000-0000-000000000002&quot;</span>)<span class="question-mark">?</span>;
         output_file.cmac = <span class="prelude-val">Some</span>(FileAuthTag::mock());
         <span class="self">self</span>.write_to_db(<span class="kw-2">&amp;</span>output_file).<span class="kw">await</span><span class="question-mark">?</span>;

         <span class="kw">let </span><span class="kw-2">mut </span>input_file = TeaclaveInputFile::from_output(output_file)<span class="question-mark">?</span>;
         input_file.uuid = Uuid::parse_str(<span class="string">&quot;00000000-0000-0000-0000-000000000002&quot;</span>)<span class="question-mark">?</span>;
         <span class="self">self</span>.write_to_db(<span class="kw-2">&amp;</span>input_file).<span class="kw">await</span><span class="question-mark">?</span>;

         <span class="kw">let </span>function_input = FunctionInput::new(<span class="string">&quot;input&quot;</span>, <span class="string">&quot;input_desc&quot;</span>, <span class="bool-val">false</span>);
         <span class="kw">let </span>function_output = FunctionOutput::new(<span class="string">&quot;output&quot;</span>, <span class="string">&quot;output_desc&quot;</span>, <span class="bool-val">false</span>);
         <span class="kw">let </span>function_input2 = FunctionInput::new(<span class="string">&quot;input2&quot;</span>, <span class="string">&quot;input_desc&quot;</span>, <span class="bool-val">false</span>);
         <span class="kw">let </span>function_output2 = FunctionOutput::new(<span class="string">&quot;output2&quot;</span>, <span class="string">&quot;output_desc&quot;</span>, <span class="bool-val">false</span>);
         <span class="kw">let </span>function_arg1 = FunctionArgument::new(<span class="string">&quot;arg1&quot;</span>, <span class="string">&quot;&quot;</span>, <span class="bool-val">true</span>);
         <span class="kw">let </span>function_arg2 = FunctionArgument::new(<span class="string">&quot;arg2&quot;</span>, <span class="string">&quot;&quot;</span>, <span class="bool-val">true</span>);

         <span class="kw">let </span>function_id = Uuid::parse_str(<span class="string">&quot;00000000-0000-0000-0000-000000000001&quot;</span>).unwrap();
         <span class="kw">let </span>function = FunctionBuilder::new()
             .id(function_id)
             .name(<span class="string">&quot;mock-func-1&quot;</span>)
             .description(<span class="string">&quot;mock-desc&quot;</span>)
             .payload(<span class="string">b&quot;mock-payload&quot;</span>.to_vec())
             .public(<span class="bool-val">true</span>)
             .arguments(<span class="macro">vec!</span>[function_arg1, function_arg2])
             .inputs(<span class="macro">vec!</span>[function_input, function_input2])
             .outputs(<span class="macro">vec!</span>[function_output, function_output2])
             .owner(<span class="string">&quot;teaclave&quot;</span>.to_string())
             .build();

         <span class="kw">let </span>function_usage = FunctionUsage {
             function_id,
             use_numbers: <span class="number">0</span>,
         };

         <span class="self">self</span>.write_to_db(<span class="kw-2">&amp;</span>function).<span class="kw">await</span><span class="question-mark">?</span>;
         <span class="self">self</span>.write_to_db(<span class="kw-2">&amp;</span>function_usage).<span class="kw">await</span><span class="question-mark">?</span>;

         <span class="kw">let </span>function_output = FunctionOutput::new(<span class="string">&quot;output&quot;</span>, <span class="string">&quot;output_desc&quot;</span>, <span class="bool-val">false</span>);
         <span class="kw">let </span>function_arg1 = FunctionArgument::new(<span class="string">&quot;arg1&quot;</span>, <span class="string">&quot;&quot;</span>, <span class="bool-val">true</span>);
         <span class="kw">let </span>function_id = Uuid::parse_str(<span class="string">&quot;00000000-0000-0000-0000-000000000002&quot;</span>).unwrap();

         <span class="kw">let </span>function = FunctionBuilder::new()
             .id(function_id)
             .name(<span class="string">&quot;mock-func-2&quot;</span>)
             .description(<span class="string">&quot;mock-desc&quot;</span>)
             .payload(<span class="string">b&quot;mock-payload&quot;</span>.to_vec())
             .public(<span class="bool-val">true</span>)
             .arguments(<span class="macro">vec!</span>[function_arg1.clone()])
             .outputs(<span class="macro">vec!</span>[function_output])
             .owner(<span class="string">&quot;teaclave&quot;</span>.to_string())
             .build();

         <span class="kw">let </span>function_usage = FunctionUsage {
             function_id,
             use_numbers: <span class="number">0</span>,
         };

         <span class="self">self</span>.write_to_db(<span class="kw-2">&amp;</span>function).<span class="kw">await</span><span class="question-mark">?</span>;
         <span class="self">self</span>.write_to_db(<span class="kw-2">&amp;</span>function_usage).<span class="kw">await</span><span class="question-mark">?</span>;

         <span class="kw">let </span>function_id = Uuid::parse_str(<span class="string">&quot;00000000-0000-0000-0000-000000000003&quot;</span>).unwrap();
         <span class="kw">let </span>function = FunctionBuilder::new()
             .id(function_id)
             .name(<span class="string">&quot;mock-func-3&quot;</span>)
             .description(<span class="string">&quot;Private mock function&quot;</span>)
             .payload(<span class="string">b&quot;mock-payload&quot;</span>.to_vec())
             .public(<span class="bool-val">false</span>)
             .arguments(<span class="macro">vec!</span>[function_arg1])
             .owner(<span class="string">&quot;mock_user&quot;</span>.to_string())
             .user_allowlist(<span class="macro">vec!</span>[<span class="string">&quot;mock_user&quot;</span>.to_string(), <span class="string">&quot;mock_user1&quot;</span>.to_string()])
             .build();

         <span class="kw">let </span>function_usage = FunctionUsage {
             function_id,
             use_numbers: <span class="number">0</span>,
         };

         <span class="self">self</span>.write_to_db(<span class="kw-2">&amp;</span>function).<span class="kw">await</span><span class="question-mark">?</span>;
         <span class="self">self</span>.write_to_db(<span class="kw-2">&amp;</span>function_usage).<span class="kw">await</span><span class="question-mark">?</span>;

         <span class="prelude-val">Ok</span>(())
     }
 }

 <span class="kw">fn </span>get_request_user_id&lt;T&gt;(request: <span class="kw-2">&amp;</span>Request&lt;T&gt;) -&gt; <span class="prelude-ty">Result</span>&lt;UserID, ManagementServiceError&gt; {
     <span class="kw">let </span>user_id = request
         .metadata()
         .get(<span class="string">&quot;id&quot;</span>)
         .and_then(|x| x.to_str().ok())
         .ok_or(ManagementServiceError::MissingUserId)<span class="question-mark">?</span>;
     <span class="prelude-val">Ok</span>(user_id.to_string().into())
 }

 <span class="kw">fn </span>get_request_role&lt;T&gt;(request: <span class="kw-2">&amp;</span>Request&lt;T&gt;) -&gt; <span class="prelude-ty">Result</span>&lt;UserRole, ManagementServiceError&gt; {
     <span class="kw">let </span>role = request
         .metadata()
         .get(<span class="string">&quot;role&quot;</span>)
         .and_then(|x| x.to_str().ok())
         .ok_or(ManagementServiceError::MissingUserRole)<span class="question-mark">?</span>;
     <span class="prelude-val">Ok</span>(UserRole::from_str(role))
 }

 <span class="kw">fn </span>create_fusion_data(owners: <span class="kw">impl </span>Into&lt;OwnerList&gt;) -&gt; anyhow::Result&lt;TeaclaveOutputFile&gt; {
     <span class="kw">let </span>uuid = Uuid::new_v4();
     <span class="kw">let </span>url = <span class="macro">format!</span>(<span class="string">&quot;fusion:///TEACLAVE_FUSION_BASE/{}.fusion&quot;</span>, uuid);
     <span class="kw">let </span>url = Url::parse(<span class="kw-2">&amp;</span>url).map_err(|<span class="kw">_</span>| <span class="macro">anyhow!</span>(<span class="string">&quot;invalid url&quot;</span>))<span class="question-mark">?</span>;
     <span class="kw">let </span>crypto_info = FileCrypto::default();

     <span class="prelude-val">Ok</span>(TeaclaveOutputFile::new(url, crypto_info, owners))
 }

 <span class="attribute">#[cfg(feature = <span class="string">&quot;enclave_unit_test&quot;</span>)]
 </span><span class="kw">pub mod </span>tests {
     <span class="kw">use super</span>::<span class="kw-2">*</span>;
     <span class="kw">use </span>serde_json::json;
     <span class="kw">use </span>std::collections::HashMap;
     <span class="kw">use </span>teaclave_types::{
         hashmap, Executor, FileAuthTag, FileCrypto, FunctionArguments, FunctionInput,
         FunctionInputFile, FunctionOutput, FunctionOutputFile,
     };
     <span class="kw">use </span>url::Url;

     <span class="kw">pub fn </span>handle_input_file() {
         <span class="kw">let </span>url = Url::parse(<span class="string">&quot;s3://bucket_id/path?token=mock_token&quot;</span>).unwrap();
         <span class="kw">let </span>cmac = FileAuthTag::mock();
         <span class="kw">let </span>input_file =
             TeaclaveInputFile::new(url, cmac, FileCrypto::default(), <span class="macro">vec!</span>[<span class="string">&quot;mock_user&quot;</span>]);
         <span class="macro">assert!</span>(TeaclaveInputFile::match_prefix(<span class="kw-2">&amp;</span>input_file.key_string()));
         <span class="kw">let </span>value = input_file.to_vec().unwrap();
         <span class="kw">let </span>deserialized_file = TeaclaveInputFile::from_slice(<span class="kw-2">&amp;</span>value).unwrap();
         <span class="macro">debug!</span>(<span class="string">&quot;file: {:?}&quot;</span>, deserialized_file);
     }

     <span class="kw">pub fn </span>handle_output_file() {
         <span class="kw">let </span>url = Url::parse(<span class="string">&quot;s3://bucket_id/path?token=mock_token&quot;</span>).unwrap();
         <span class="kw">let </span>output_file = TeaclaveOutputFile::new(url, FileCrypto::default(), <span class="macro">vec!</span>[<span class="string">&quot;mock_user&quot;</span>]);
         <span class="macro">assert!</span>(TeaclaveOutputFile::match_prefix(<span class="kw-2">&amp;</span>output_file.key_string()));
         <span class="kw">let </span>value = output_file.to_vec().unwrap();
         <span class="kw">let </span>deserialized_file = TeaclaveOutputFile::from_slice(<span class="kw-2">&amp;</span>value).unwrap();
         <span class="macro">debug!</span>(<span class="string">&quot;file: {:?}&quot;</span>, deserialized_file);
     }

     <span class="kw">pub fn </span>handle_function() {
         <span class="kw">let </span>function_input = FunctionInput::new(<span class="string">&quot;input&quot;</span>, <span class="string">&quot;input_desc&quot;</span>, <span class="bool-val">false</span>);
         <span class="kw">let </span>function_output = FunctionOutput::new(<span class="string">&quot;output&quot;</span>, <span class="string">&quot;output_desc&quot;</span>, <span class="bool-val">false</span>);
         <span class="kw">let </span>function_arg = FunctionArgument::new(<span class="string">&quot;arg&quot;</span>, <span class="string">&quot;&quot;</span>, <span class="bool-val">true</span>);
         <span class="kw">let </span>function = FunctionBuilder::new()
             .id(Uuid::new_v4())
             .name(<span class="string">&quot;mock_function&quot;</span>)
             .description(<span class="string">&quot;mock function&quot;</span>)
             .payload(<span class="string">b&quot;python script&quot;</span>.to_vec())
             .arguments(<span class="macro">vec!</span>[function_arg])
             .inputs(<span class="macro">vec!</span>[function_input])
             .outputs(<span class="macro">vec!</span>[function_output])
             .public(<span class="bool-val">true</span>)
             .owner(<span class="string">&quot;mock_user&quot;</span>)
             .build();
         <span class="macro">assert!</span>(Function::match_prefix(<span class="kw-2">&amp;</span>function.key_string()));
         <span class="kw">let </span>value = function.to_vec().unwrap();
         <span class="kw">let </span>deserialized_function = Function::from_slice(<span class="kw-2">&amp;</span>value).unwrap();
         <span class="macro">debug!</span>(<span class="string">&quot;function: {:?}&quot;</span>, deserialized_function);
     }

     <span class="kw">pub fn </span>check_function_quota() {
         <span class="kw">let </span>function = FunctionBuilder::new().build();
         <span class="macro">assert_eq!</span>(function.usage_quota, <span class="prelude-val">None</span>);

         <span class="kw">let </span>function = FunctionBuilder::new().usage_quota(<span class="prelude-val">Some</span>(-<span class="number">5</span>)).build();
         <span class="macro">assert_eq!</span>(function.usage_quota, <span class="prelude-val">None</span>);

         <span class="kw">let </span>function = FunctionBuilder::new().usage_quota(<span class="prelude-val">Some</span>(<span class="number">5</span>)).build();
         <span class="macro">assert_eq!</span>(function.usage_quota, <span class="prelude-val">Some</span>(<span class="number">5</span>));
     }

     <span class="kw">pub fn </span>handle_task() {
         <span class="kw">let </span>function_arg = FunctionArgument::new(<span class="string">&quot;arg&quot;</span>, <span class="string">&quot;&quot;</span>, <span class="bool-val">true</span>);
         <span class="kw">let </span>function = FunctionBuilder::new()
             .id(Uuid::new_v4())
             .name(<span class="string">&quot;mock_function&quot;</span>)
             .description(<span class="string">&quot;mock function&quot;</span>)
             .payload(<span class="string">b&quot;python script&quot;</span>.to_vec())
             .arguments(<span class="macro">vec!</span>[function_arg])
             .public(<span class="bool-val">true</span>)
             .owner(<span class="string">&quot;mock_user&quot;</span>)
             .build();
         <span class="kw">let </span>function_arguments = FunctionArguments::from_json(<span class="macro">json!</span>({<span class="string">&quot;arg&quot;</span>: <span class="string">&quot;data&quot;</span>})).unwrap();

         <span class="kw">let </span>task = Task::&lt;Create&gt;::new(
             UserID::from(<span class="string">&quot;mock_user&quot;</span>),
             Executor::MesaPy,
             function_arguments,
             HashMap::new(),
             HashMap::new(),
             function,
         )
         .unwrap();

         <span class="kw">let </span>ts: TaskState = task.try_into().unwrap();
         <span class="kw">let </span>value = ts.to_vec().unwrap();
         <span class="kw">let </span>deserialized_task = TaskState::from_slice(<span class="kw-2">&amp;</span>value).unwrap();
         <span class="macro">debug!</span>(<span class="string">&quot;task: {:?}&quot;</span>, deserialized_task);
     }

     <span class="kw">pub fn </span>handle_staged_task() {
         <span class="kw">let </span>function = FunctionBuilder::new()
             .id(Uuid::new_v4())
             .name(<span class="string">&quot;mock_function&quot;</span>)
             .description(<span class="string">&quot;mock function&quot;</span>)
             .payload(<span class="string">b&quot;python script&quot;</span>.to_vec())
             .public(<span class="bool-val">true</span>)
             .owner(<span class="string">&quot;mock_user&quot;</span>)
             .build();

         <span class="kw">let </span>url = Url::parse(<span class="string">&quot;s3://bucket_id/path?token=mock_token&quot;</span>).unwrap();
         <span class="kw">let </span>cmac = FileAuthTag::mock();
         <span class="kw">let </span>input_data = FunctionInputFile::new(url.clone(), cmac, FileCrypto::default());
         <span class="kw">let </span>output_data = FunctionOutputFile::new(url, FileCrypto::default());

         <span class="kw">let </span>staged_task = StagedTaskBuilder::new()
             .task_id(Uuid::new_v4())
             .executor(Executor::MesaPy)
             .function_payload(function.payload)
             .function_arguments(<span class="macro">hashmap!</span>(<span class="string">&quot;arg&quot; </span>=&gt; <span class="string">&quot;data&quot;</span>))
             .input_data(<span class="macro">hashmap!</span>(<span class="string">&quot;input&quot; </span>=&gt; input_data))
             .output_data(<span class="macro">hashmap!</span>(<span class="string">&quot;output&quot; </span>=&gt; output_data))
             .build();

         <span class="kw">let </span>value = staged_task.to_vec().unwrap();
         <span class="kw">let </span>deserialized_data = StagedTask::from_slice(<span class="kw-2">&amp;</span>value).unwrap();
         <span class="macro">debug!</span>(<span class="string">&quot;staged task: {:?}&quot;</span>, deserialized_data);
     }
 }
 </code></pre></div>
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