Added Partial Check command

src/main.rs

@@ -25,7 +25,7 @@ use checksum::*;
 use download::download_with_retries;
 use go_spacemesh::get_version;
 use parsers::*;
-use partial_quicksync::partial_restore;
+use partial_quicksync::{check_for_restore_points, partial_restore};
 use sql::get_last_layer_from_db;
 use utils::*;
 
@@ -97,6 +97,22 @@ enum Commands {
     #[clap(short = 'u', long, default_value = partial_quicksync::DEFAULT_BASE_URL)]
     base_url: String,
   },
+  /// Partial check availability
+  PartialCheck {
+    /// Path to the node state.sql
+    #[clap(short = 's', long)]
+    state_sql: PathBuf,
+    /// Number of layers present in the DB that are not trusted to be fully synced.
+    /// These layers will also be synced.
+    #[clap(long, default_value_t = 10)]
+    untrusted_layers: u32,
+    /// Jump-back to recover earlier than latest layer. It will jump back one row in recovery metadata
+    #[clap(short = 'j', long, default_value_t = 0)]
+    jump_back: usize,
+    /// URL to download parts from
+    #[clap(short = 'u', long, default_value = partial_quicksync::DEFAULT_BASE_URL)]
+    base_url: String,
+  },
 }
 
 fn go_spacemesh_default_path() -> &'static str {
@@ -352,5 +368,20 @@ fn main() -> anyhow::Result<()> {
         jump_back,
       )
     }
+    Commands::PartialCheck {
+      state_sql,
+      base_url,
+      untrusted_layers,
+      jump_back,
+    } => {
+      let state_sql_path = resolve_path(&state_sql).context("resolving state.sql path")?;
+      if !state_sql_path
+        .try_exists()
+        .context("checking if state file exists")?
+      {
+        return Err(anyhow!("state file not found: {:?}", state_sql_path));
+      }
+      check_for_restore_points(&base_url, &state_sql_path, untrusted_layers, jump_back)
+    }
   }
 }

src/partial_quicksync.rs

@@ -150,13 +150,12 @@
   Ok(())
 }
 
-pub fn partial_restore(
+fn get_restore_points(
   base_url: &str,
   target_db_path: &Path,
-  download_path: &Path,
   untrusted_layers: u32,
   jump_back: usize,
-) -> Result<()> {
+) -> Result<(Vec<RestorePoint>, String, usize)> {
   let client = Client::new();
   let conn = Connection::open(target_db_path)?;
   let user_version = get_user_version(&conn)?;
@@ -197,6 +196,20 @@
     "No suitable restore points found, seems that state.sql is too old"
   );
 
+  Ok((start_points, remote_metadata, user_version))
+}
+
+pub fn partial_restore(
+  base_url: &str,
+  target_db_path: &Path,
+  download_path: &Path,
+  untrusted_layers: u32,
+  jump_back: usize,
+) -> Result<()> {
+  let (start_points, _, user_version) =
+    get_restore_points(base_url, target_db_path, untrusted_layers, jump_back)?;
+  let client = Client::new();
+
   let restore_string = client
     .get(format!(
       "{}/{}/restore.sql?version={}",
@@ -212,7 +225,6 @@
     "Looking for restore points with untrusted_layers={untrusted_layers}, jump_back={jump_back}"
   );
   println!("Found {total} potential restore points");
-  conn.close().expect("closing DB connection");
 
   let source_db_path_zst = &download_path.join("backup_source.db.zst");
   let source_db_path = &download_path.join("backup_source.db");
@@ -263,6 +275,24 @@
   Ok(())
 }
 
+pub fn check_for_restore_points(
+  base_url: &str,
+  target_db_path: &Path,
+  untrusted_layers: u32,
+  jump_back: usize,
+) -> Result<()> {
+  let (start_points, _, _) =
+    get_restore_points(base_url, target_db_path, untrusted_layers, jump_back)?;
+
+  anyhow::ensure!(!start_points.is_empty(), "No restore points available.");
+
+  let first = start_points.first().unwrap();
+  let last = start_points.last().unwrap();
+  println!("Possible to restore from: {}", first.from);
+  println!("Possible to restore up to: {}", last.to);
+  Ok(())
+}
+
 #[cfg(test)]
 impl RestorePoint {
   fn new<H: Into<String>>(from: u32, to: u32, hash: H) -> Self {