Expose descriptor function

Author: sanket1729

src/descriptor/mod.rs

@@ -384,6 +384,27 @@ impl<Pk: MiniscriptKey> Descriptor<Pk> {
             )),
         }
     }
+
+    /// Whether the descriptor is safe
+    /// Checks whether all the spend paths in the descriptor are possible
+    /// on the bitcoin network under the current standardness and consensus rules
+    /// Also checks whether the descriptor requires signauture on all spend paths
+    /// And whether the script is malleable.
+    /// In general, all the guarantees of miniscript hold only for safe scripts.
+    /// All the analysis gurantees of miniscript only hold safe scripts.
+    /// The signer may not be able to find satisfactions even if one exists
+    pub fn check_safety(&self) -> Result<(), Error> {
+        match *self {
+            Descriptor::Bare(ref ms) => ms.check_safety()?,
+            Descriptor::Pk(ref _pk)
+            | Descriptor::Pkh(ref _pk)
+            | Descriptor::Wpkh(ref _pk)
+            | Descriptor::ShWpkh(ref _pk) => {}
+            Descriptor::Wsh(ref ms) | Descriptor::ShWsh(ref ms) => ms.check_safety()?,
+            Descriptor::Sh(ref ms) => ms.check_safety()?,
+        }
+        Ok(())
+    }
 }
 
 impl<Pk: MiniscriptKey + ToPublicKey> Descriptor<Pk> {