add backend-type in conf

src/lib.rs

@@ -34,6 +34,12 @@ pub use electrum_client;
 pub use error::Error;
 pub use which;
 
+pub enum Backend {
+    Electrs,
+    Esplora,
+    Mempool,
+}
+
 /// Electrs configuration parameters, implements a convenient [Default] for most common use.
 ///
 /// Default values:
@@ -81,6 +87,9 @@ pub struct Conf<'a> {
     /// Persistent directory path
     pub staticdir: Option<PathBuf>,
 
+    /// The backend type in use
+    pub backend: Backend,
+
     /// Try to spawn the process `attempt` time
     ///
     /// The OS is giving available ports to use, however, they aren't booked, so it could rarely
@@ -110,6 +119,7 @@ impl Default for Conf<'_> {
             staticdir: None,
             attempts: 3,
             buffered_logs: false,
+            backend: Backend::Electrs,
         }
     }
 }
@@ -202,7 +212,11 @@ impl ElectrsD {
         let cookie_file;
         #[cfg(not(feature = "legacy"))]
         {
-            args.push("--cookie-file");
+            if let Backend::Esplora = conf.backend {
+                args.push("--cookie");
+            } else {
+                args.push("--cookie-file");
+            }
             cookie_file = format!("{}", bitcoind.params.cookie_file.display());
             args.push(&cookie_file);
         }