From cce8f30fe7721b1dfa7a653a601af351ad43837a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bj=C3=B8rn=20Olav?= <bo@jalborg.com>
Date: Sun, 6 Sep 2026 07:47:43 +0200
Subject: [PATCH 1/2] net: resolve a seed name with its port

---
 lib/net/mod.rs | 28 ++++++++++++++++++++++++++--
 1 file changed, 26 insertions(+), 2 deletions(-)

diff --git a/lib/net/mod.rs b/lib/net/mod.rs
index f4f653a2..c0e37935 100644
--- a/lib/net/mod.rs
+++ b/lib/net/mod.rs
@@ -216,7 +216,7 @@ pub async fn resolve_peer_address<S>(
     peer_addr: PeerAddress<S>,
 ) -> std::io::Result<ResolvedPeerAddress<S>>
 where
-    S: std::fmt::Display + tokio::net::ToSocketAddrs,
+    S: std::fmt::Display,
 {
     match peer_addr.host {
         url::Host::Ipv4(ipv4) => Ok(ResolvedPeerAddress::Static(
@@ -226,7 +226,9 @@ where
             SocketAddr::new(IpAddr::V6(ipv6), peer_addr.port),
         )),
         url::Host::Domain(domain) => {
-            let mut addrs: Vec<_> = tokio::net::lookup_host(&domain)
+            // `lookup_host` reads a `host:port` pair, not a bare name.
+            let host_port = format!("{domain}:{}", peer_addr.port);
+            let mut addrs: Vec<_> = tokio::net::lookup_host(host_port)
                 .await?
                 .filter_map(|addr| {
                     if addr.ip().is_unspecified() {
@@ -674,3 +676,25 @@ impl Net {
             })
     }
 }
+
+#[cfg(test)]
+mod test {
+    use std::net::{IpAddr, Ipv4Addr, Ipv6Addr};
+
+    use crate::{net::resolve_peer_address, types::net::PeerAddress};
+
+    /// A seed names a host and a port, and the resolver keeps both.
+    #[tokio::test]
+    async fn a_seed_name_resolves_with_its_port() -> anyhow::Result<()> {
+        let peer_addr: PeerAddress = "localhost:4009".parse()?;
+        let resolved = resolve_peer_address(peer_addr).await?;
+        assert_eq!(resolved.port(), 4009);
+        assert!(
+            resolved
+                .ip_addrs()
+                .any(|addr| addr == IpAddr::V4(Ipv4Addr::LOCALHOST)
+                    || addr == IpAddr::V6(Ipv6Addr::LOCALHOST))
+        );
+        Ok(())
+    }
+}

From f9cfe63867578406282ac427f1febb30a57205d2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bj=C3=B8rn=20Olav?= <bo@jalborg.com>
Date: Sun, 6 Sep 2026 07:47:47 +0200
Subject: [PATCH 2/2] net: replace the dead alphanet seeds

---
 lib/net/mod.rs | 17 ++++-------------
 1 file changed, 4 insertions(+), 13 deletions(-)

diff --git a/lib/net/mod.rs b/lib/net/mod.rs
index c0e37935..581cd2e3 100644
--- a/lib/net/mod.rs
+++ b/lib/net/mod.rs
@@ -161,19 +161,10 @@ pub fn make_server_endpoint(
 pub type PeerInfoRx =
     mpsc::UnboundedReceiver<(SocketAddr, Option<PeerConnectionInfo>)>;
 
-const ALPHANET_SEED_PEER_ADDRS: &[PeerAddress<&'static str>] = {
-    // seed.alpha.ecash.drivecha.in
-    const DRIVECHA_IN: PeerAddress<&'static str> = PeerAddress {
-        host: url::Host::Ipv4(Ipv4Addr::new(157, 180, 96, 24)),
-        port: DEFAULT_PORT,
-    };
-    // seed.alpha.ecash.ninja
-    const ECASH_NINJA: PeerAddress<&'static str> = PeerAddress {
-        host: url::Host::Domain("seed.alpha.ecash.ninja"),
-        port: DEFAULT_PORT,
-    };
-    &[DRIVECHA_IN, ECASH_NINJA]
-};
+const ALPHANET_SEED_PEER_ADDRS: &[PeerAddress<&'static str>] = &[PeerAddress {
+    host: url::Host::Domain("seed.alpha.ecash.eu.com"),
+    port: DEFAULT_PORT,
+}];
 
 const SIGNET_SEED_PEER_ADDRS: &[PeerAddress<&'static str>] = {
     const SIGNET_MINING_SERVER: PeerAddress<&'static str> = PeerAddress {