Validating sha3 of a dapp bundle (#1993)

* Validating sha3 of a file

* sha3 in utils

* Removing devtools

devtools/src/random_path.rs

@@ -67,10 +67,18 @@ impl RandomTempPath {
 	}
 }
 
+impl AsRef<Path> for RandomTempPath {
+	fn as_ref(&self) -> &Path {
+		self.as_path()
+	}
+}
+
 impl Drop for RandomTempPath {
 	fn drop(&mut self) {
-		if let Err(e) = fs::remove_dir_all(self.as_path()) {
-			panic!("Failed to remove temp directory. Here's what prevented this from happening:  ({})", e);
+		if let Err(_) = fs::remove_dir_all(&self) {
+			if let Err(e) = fs::remove_file(&self) {
+				panic!("Failed to remove temp directory. Here's what prevented this from happening:  ({})", e);
+			}
 		}
 	}
 }