plugin: Enforce canonical LSPS ordering

Author: cdecker

libs/gl-plugin/src/node/mod.rs

@@ -296,10 +296,12 @@ impl Node for PluginNodeServer {
 
         // In case the client did not specify an LSP to work with,
         // let's enumerate them, and select the best option ourselves.
-        let lsps = self.get_lsps_offers(&mut rpc).await.map_err(|_e| {
+        let mut lsps = self.get_lsps_offers(&mut rpc).await.map_err(|_e| {
             Status::not_found("Could not retrieve LSPS peers for invoice negotiation.")
         })?;
 
+        lsps.sort_by_key(|l| l.node_id.clone());
+
         if lsps.len() < 1 {
             return Err(Status::not_found(
                 "Could not find an LSP peer to negotiate the LSPS2 channel for this invoice.",