MVP CLI Proposal implementation: leaf and root interactions (#167)

* next feaf command

* delete leaf command

* get root command

* next feaf call

* delete leaf call

* get root call

* better error comment

* to stdout

* fmt

rln-cli/src/commands.rs

@@ -33,4 +33,12 @@ pub(crate) enum Commands {
         #[arg(short, long)]
         file: PathBuf,
     },
+    SetNextLeaf {
+        #[arg(short, long)]
+        file: PathBuf,
+    },
+    DeleteLeaf {
+        index: usize,
+    },
+    GetRoot,
 }

rln-cli/src/main.rs

@@ -54,7 +54,7 @@ fn main() -> Result<()> {
         Some(Commands::SetTree { tree_height }) => {
             state
                 .rln
-                .ok_or(Report::msg("no RLN initialized"))?
+                .ok_or(Report::msg("no RLN instance initialized"))?
                 .set_tree(*tree_height)?;
             Ok(())
         }
@@ -62,7 +62,7 @@ fn main() -> Result<()> {
             let input_data = File::open(&file)?;
             state
                 .rln
-                .ok_or(Report::msg("no RLN initialized"))?
+                .ok_or(Report::msg("no RLN instance initialized"))?
                 .set_leaf(*index, input_data)?;
             Ok(())
         }
@@ -70,7 +70,7 @@ fn main() -> Result<()> {
             let input_data = File::open(&file)?;
             state
                 .rln
-                .ok_or(Report::msg("no RLN initialized"))?
+                .ok_or(Report::msg("no RLN instance initialized"))?
                 .set_leaves_from(*index, input_data)?;
             Ok(())
         }
@@ -78,10 +78,33 @@ fn main() -> Result<()> {
             let input_data = File::open(&file)?;
             state
                 .rln
-                .ok_or(Report::msg("no RLN initialized"))?
+                .ok_or(Report::msg("no RLN instance initialized"))?
                 .init_tree_with_leaves(input_data)?;
             Ok(())
         }
+        Some(Commands::SetNextLeaf { file }) => {
+            let input_data = File::open(&file)?;
+            state
+                .rln
+                .ok_or(Report::msg("no RLN instance initialized"))?
+                .set_next_leaf(input_data)?;
+            Ok(())
+        }
+        Some(Commands::DeleteLeaf { index }) => {
+            state
+                .rln
+                .ok_or(Report::msg("no RLN instance initialized"))?
+                .delete_leaf(*index)?;
+            Ok(())
+        }
+        Some(Commands::GetRoot) => {
+            let writer = std::io::stdout();
+            state
+                .rln
+                .ok_or(Report::msg("no RLN instance initialized"))?
+                .get_root(writer)?;
+            Ok(())
+        }
         None => Ok(()),
     }
 }