Extract resolved config in struct (#2220)

* Extract resolved config in struct

* Function instead of iterator

nym-vpn-core/crates/nym-gateway-directory/src/gateway_client.rs

@@ -1,6 +1,7 @@
 // Copyright 2023-2024 - Nym Technologies SA <[email protected]>
 // SPDX-License-Identifier: GPL-3.0-only
 
+use std::net::SocketAddr;
 use std::{fmt, net::IpAddr};
 
 use nym_sdk::UserAgent;
@@ -87,6 +88,24 @@ impl Config {
     }
 }
 
+pub struct ResolvedConfig {
+    pub nyxd_socket_addrs: Vec<SocketAddr>,
+    pub api_socket_addrs: Vec<SocketAddr>,
+    pub nym_vpn_api_socket_addres: Option<Vec<SocketAddr>>,
+}
+
+impl ResolvedConfig {
+    pub fn all_socket_addrs(&self) -> Vec<SocketAddr> {
+        let mut socket_addrs = vec![];
+        socket_addrs.extend(self.nyxd_socket_addrs.iter());
+        socket_addrs.extend(self.api_socket_addrs.iter());
+        if let Some(vpn_api_socket_addrs) = &self.nym_vpn_api_socket_addres {
+            socket_addrs.extend(vpn_api_socket_addrs.iter());
+        }
+        socket_addrs
+    }
+}
+
 pub struct GatewayClient {
     api_client: NymApiClient,
     nym_vpn_api_client: Option<nym_vpn_api_client::VpnApiClient>,

nym-vpn-core/crates/nym-gateway-directory/src/helpers.rs

@@ -6,7 +6,7 @@ use std::net::{IpAddr, SocketAddr};
 use nym_http_api_client::HickoryDnsResolver;
 use tracing::debug;
 
-use crate::{error::Result, Config, Error};
+use crate::{error::Result, gateway_client::ResolvedConfig, Config, Error};
 
 async fn try_resolve_hostname(hostname: &str) -> Result<Vec<IpAddr>> {
     debug!("Trying to resolve hostname: {hostname}");
@@ -28,34 +28,37 @@ async fn try_resolve_hostname(hostname: &str) -> Result<Vec<IpAddr>> {
     Ok(ips)
 }
 
-pub async fn allowed_ips(config: &Config) -> Result<Vec<SocketAddr>> {
-    let mut socket_addrs = vec![];
-    let mut urls = vec![];
-
-    urls.push(config.nyxd_url());
-    urls.push(config.api_url());
-    if let Some(vpn_api_url) = config.nym_vpn_api_url() {
-        urls.push(vpn_api_url);
-    }
-
-    for unresolved_url in urls {
-        let port = unresolved_url
-            .port_or_known_default()
-            .ok_or(Error::UrlError {
-                url: unresolved_url.clone(),
-                reason: "missing port".to_string(),
-            })?;
-        let hostname = unresolved_url.host_str().ok_or(Error::UrlError {
+async fn url_to_socket_addr(unresolved_url: &url::Url) -> Result<Vec<SocketAddr>> {
+    let port = unresolved_url
+        .port_or_known_default()
+        .ok_or(Error::UrlError {
             url: unresolved_url.clone(),
-            reason: "missing hostname".to_string(),
+            reason: "missing port".to_string(),
         })?;
-        socket_addrs.extend(
-            try_resolve_hostname(hostname)
-                .await?
-                .into_iter()
-                .map(|ip| SocketAddr::new(ip, port)),
-        );
-    }
+    let hostname = unresolved_url.host_str().ok_or(Error::UrlError {
+        url: unresolved_url.clone(),
+        reason: "missing hostname".to_string(),
+    })?;
+
+    Ok(try_resolve_hostname(hostname)
+        .await?
+        .into_iter()
+        .map(|ip| SocketAddr::new(ip, port))
+        .collect())
+}
+
+pub async fn resolve_config(config: &Config) -> Result<ResolvedConfig> {
+    let nyxd_socket_addrs = url_to_socket_addr(config.nyxd_url()).await?;
+    let api_socket_addrs = url_to_socket_addr(config.api_url()).await?;
+    let nym_vpn_api_socket_addres = if let Some(vpn_api_url) = config.nym_vpn_api_url() {
+        Some(url_to_socket_addr(vpn_api_url).await?)
+    } else {
+        None
+    };
 
-    Ok(socket_addrs)
+    Ok(ResolvedConfig {
+        nyxd_socket_addrs,
+        api_socket_addrs,
+        nym_vpn_api_socket_addres,
+    })
 }

nym-vpn-core/crates/nym-gateway-directory/src/lib.rs

@@ -23,5 +23,5 @@ pub use crate::{
     },
     error::Error,
     gateway_client::{Config, GatewayClient},
-    helpers::allowed_ips,
+    helpers::resolve_config,
 };