add backend-type in conf

src/lib.rs

@@ -34,6 +34,13 @@ pub use electrum_client;
 pub use error::Error;
 pub use which;
 
+#[derive(Debug, Clone, Eq, PartialEq)]
+pub enum Backend {
+    Electrs,
+    Esplora,
+    Mempool,
+}
+
 /// Electrs configuration parameters, implements a convenient [Default] for most common use.
 ///
 /// Default values:
@@ -81,6 +88,9 @@ 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 +120,7 @@ impl Default for Conf<'_> {
             staticdir: None,
             attempts: 3,
             buffered_logs: false,
+            backend: Backend::Electrs,
         }
     }
 }
@@ -201,10 +212,20 @@ impl ElectrsD {
         #[cfg(not(feature = "legacy"))]
         let cookie_file;
         #[cfg(not(feature = "legacy"))]
+        let cookie_value;
+        #[cfg(not(feature = "legacy"))]
         {
-            args.push("--cookie-file");
-            cookie_file = format!("{}", bitcoind.params.cookie_file.display());
-            args.push(&cookie_file);
+            if let Backend::Mempool = conf.backend {
+                args.push("--cookie");
+                let mut cookie = std::fs::File::open(&bitcoind.params.cookie_file)?;
+                cookie_value = String::new();
+                cookie.read_to_string(&mut cookie_value)?;
+                args.push(&cookie_value);
+            } else {
+                args.push("--cookie-file");
+                cookie_file = format!("{}", bitcoind.params.cookie_file.display());
+                args.push(&cookie_file);
+            }
         }
 
         #[cfg(feature = "legacy")]
@@ -227,6 +248,7 @@ impl ElectrsD {
         if cfg!(feature = "electrs_0_8_10")
             || cfg!(feature = "esplora_a33e97e1")
             || cfg!(feature = "legacy")
+            || conf.backend == Backend::Mempool
         {
             args.push("--jsonrpc-import");
         } else {