feat(tasks): add README & return the latest status only from POST 'pr…

…oof/report' (#319)

* bd latest status

* Update README.md

README.md

@@ -54,6 +54,20 @@ Look into `prove-block.sh` for the available options or run the script without i
 ./script/prove-block.sh taiko_a7 native sync
 ```
 
+### Task Management
+The script `prove-block.sh` always sends a POST request to Raiko server and enqueue a proving task. If you repeately send the same request, it will pull the latest status of the task and return the proof if ready. 
+To check the progress of all tasks:
+
+```shell
+ curl --location --request POST 'http://localhost:8080/proof/report'
+```
+
+To prune all tasks (the cancellation feature that kills prover is still WIP):
+
+```shell
+ curl --location --request POST 'http://localhost:8080/proof/prune'
+```
+
 ## Provers
 
 For all host programs, you can enable CPU optimization through exporting `CPU_OPT=1`.

tasks/src/mem_db.rs

@@ -136,8 +136,9 @@ impl InMemoryTaskDb {
             .enqueue_task
             .iter()
             .flat_map(|(descriptor, statuses)| {
+                // Return the latest status
                 statuses
-                    .iter()
+                    .last()
                     .map(|status| TaskReport(descriptor.clone(), status.0))
             })
             .collect())