ME Pool Init fixes

src/config/defaults.rs

@@ -141,6 +141,14 @@ pub(crate) fn default_proxy_secret_path() -> Option<String> {
     Some("proxy-secret".to_string())
 }
 
+pub(crate) fn default_proxy_config_v4_cache_path() -> Option<String> {
+    Some("cache/proxy-config-v4.txt".to_string())
+}
+
+pub(crate) fn default_proxy_config_v6_cache_path() -> Option<String> {
+    Some("cache/proxy-config-v6.txt".to_string())
+}
+
 pub(crate) fn default_middle_proxy_nat_stun() -> Option<String> {
     None
 }

src/config/hot_reload.rs

@@ -405,6 +405,12 @@ fn warn_non_hot_changes(old: &ProxyConfig, new: &ProxyConfig, non_hot_changed: b
         warned = true;
         warn!("config reload: general.me2dc_fallback changed; restart required");
     }
+    if old.general.proxy_config_v4_cache_path != new.general.proxy_config_v4_cache_path
+        || old.general.proxy_config_v6_cache_path != new.general.proxy_config_v6_cache_path
+    {
+        warned = true;
+        warn!("config reload: general.proxy_config_*_cache_path changed; restart required");
+    }
     if old.general.me_keepalive_enabled != new.general.me_keepalive_enabled
         || old.general.me_keepalive_interval_secs != new.general.me_keepalive_interval_secs
         || old.general.me_keepalive_jitter_secs != new.general.me_keepalive_jitter_secs

src/config/load.rs

@@ -203,6 +203,22 @@ impl ProxyConfig {
 
         sanitize_ad_tag(&mut config.general.ad_tag);
 
+        if let Some(path) = &config.general.proxy_config_v4_cache_path
+            && path.trim().is_empty()
+        {
+            return Err(ProxyError::Config(
+                "general.proxy_config_v4_cache_path cannot be empty when provided".to_string(),
+            ));
+        }
+
+        if let Some(path) = &config.general.proxy_config_v6_cache_path
+            && path.trim().is_empty()
+        {
+            return Err(ProxyError::Config(
+                "general.proxy_config_v6_cache_path cannot be empty when provided".to_string(),
+            ));
+        }
+
         if let Some(update_every) = config.general.update_every {
             if update_every == 0 {
                 return Err(ProxyError::Config(
@@ -691,6 +707,14 @@ mod tests {
             cfg.general.me2dc_fallback,
             default_me2dc_fallback()
         );
+        assert_eq!(
+            cfg.general.proxy_config_v4_cache_path,
+            default_proxy_config_v4_cache_path()
+        );
+        assert_eq!(
+            cfg.general.proxy_config_v6_cache_path,
+            default_proxy_config_v6_cache_path()
+        );
         assert_eq!(
             cfg.general.me_single_endpoint_shadow_writers,
             default_me_single_endpoint_shadow_writers()
@@ -801,6 +825,14 @@ mod tests {
             default_me_init_retry_attempts()
         );
         assert_eq!(general.me2dc_fallback, default_me2dc_fallback());
+        assert_eq!(
+            general.proxy_config_v4_cache_path,
+            default_proxy_config_v4_cache_path()
+        );
+        assert_eq!(
+            general.proxy_config_v6_cache_path,
+            default_proxy_config_v6_cache_path()
+        );
         assert_eq!(
             general.me_single_endpoint_shadow_writers,
             default_me_single_endpoint_shadow_writers()
@@ -1267,6 +1299,42 @@ mod tests {
         let _ = std::fs::remove_file(path);
     }
 
+    #[test]
+    fn proxy_config_cache_paths_empty_are_rejected() {
+        let toml = r#"
+            [general]
+            proxy_config_v4_cache_path = "   "
+
+            [censorship]
+            tls_domain = "example.com"
+
+            [access.users]
+            user = "00000000000000000000000000000000"
+        "#;
+        let dir = std::env::temp_dir();
+        let path = dir.join("telemt_proxy_config_v4_cache_path_empty_test.toml");
+        std::fs::write(&path, toml).unwrap();
+        let err = ProxyConfig::load(&path).unwrap_err().to_string();
+        assert!(err.contains("general.proxy_config_v4_cache_path cannot be empty"));
+        let _ = std::fs::remove_file(path);
+
+        let toml_v6 = r#"
+            [general]
+            proxy_config_v6_cache_path = ""
+
+            [censorship]
+            tls_domain = "example.com"
+
+            [access.users]
+            user = "00000000000000000000000000000000"
+        "#;
+        let path_v6 = dir.join("telemt_proxy_config_v6_cache_path_empty_test.toml");
+        std::fs::write(&path_v6, toml_v6).unwrap();
+        let err_v6 = ProxyConfig::load(&path_v6).unwrap_err().to_string();
+        assert!(err_v6.contains("general.proxy_config_v6_cache_path cannot be empty"));
+        let _ = std::fs::remove_file(path_v6);
+    }
+
     #[test]
     fn me_hardswap_warmup_defaults_are_set() {
         let toml = r#"

src/config/types.rs

@@ -343,6 +343,14 @@ pub struct GeneralConfig {
     #[serde(default = "default_proxy_secret_path")]
     pub proxy_secret_path: Option<String>,
 
+    /// Optional path to cache raw getProxyConfig (IPv4) snapshot for startup fallback.
+    #[serde(default = "default_proxy_config_v4_cache_path")]
+    pub proxy_config_v4_cache_path: Option<String>,
+
+    /// Optional path to cache raw getProxyConfigV6 snapshot for startup fallback.
+    #[serde(default = "default_proxy_config_v6_cache_path")]
+    pub proxy_config_v6_cache_path: Option<String>,
+
     /// Global ad_tag (32 hex chars from @MTProxybot). Fallback when user has no per-user tag in access.user_ad_tags.
     #[serde(default)]
     pub ad_tag: Option<String>,
@@ -727,6 +735,8 @@ impl Default for GeneralConfig {
             use_middle_proxy: default_true(),
             ad_tag: None,
             proxy_secret_path: default_proxy_secret_path(),
+            proxy_config_v4_cache_path: default_proxy_config_v4_cache_path(),
+            proxy_config_v6_cache_path: default_proxy_config_v6_cache_path(),
             middle_proxy_nat_ip: None,
             middle_proxy_nat_probe: default_true(),
             middle_proxy_nat_stun: default_middle_proxy_nat_stun(),