nearcore: deprecate network configurations’s external_address field

CHANGELOG.md

@@ -6,6 +6,9 @@
 
 ### Non-protocol Changes
 
+* `network.external_address` field in `config.json` file is
+  deprecated.  In fact it has never been used and only served to
+  confuse everyone [#7300](https://github.com/near/nearcore/pull/7300)
 
 ## 1.28.0 [2022-07-27]
 

chain/network-primitives/src/config_json.rs

@@ -47,9 +47,6 @@ fn default_peer_stats_period() -> Duration {
 pub struct Config {
     /// Local address to listen for incoming connections.
     pub addr: String,
-    /// Address to advertise to peers for them to connect.
-    /// If empty, will use the same port as the addr, and will introspect on the listener.
-    pub external_address: String,
     /// Comma separated list of nodes to connect to.
     /// Examples:
     ///   ed25519:86EtEy7epneKyrcJwSWP7zsisTkfDRH5CFVszt4qiQYw@31.192.22.209:24567
@@ -140,7 +137,6 @@ impl Default for Config {
     fn default() -> Self {
         Config {
             addr: "0.0.0.0:24567".to_string(),
-            external_address: "".to_string(),
             boot_nodes: "".to_string(),
             whitelist_nodes: "".to_string(),
             max_num_peers: default_max_num_peers(),

nearcore/res/example-config-gc.json

@@ -29,7 +29,6 @@
     },
     "network": {
         "addr": "0.0.0.0:24567",
-        "external_address": "",
         "boot_nodes": "ed25519:86EtEy7epneKyrcJwSWP7zsisTkfDRH5CFVszt4qiQYw@35.195.32.249:24567,ed25519:BFB78VTDBBfCY4jCP99zWxhXUcFAZqR22oSx2KEr8UM1@35.229.222.235:24567,ed25519:Cw1YyiX9cybvz3yZcbYdG7oDV6D7Eihdfc8eM1e1KKoh@35.195.27.104:24567,ed25519:33g3PZRdDvzdRpRpFRZLyscJdbMxUA3j3Rf2ktSYwwF8@34.94.132.112:24567,ed25519:CDQFcD9bHUWdc31rDfRi4ZrJczxg8derCzybcac142tK@35.196.209.192:24567",
         "max_num_peers": 40,
         "minimum_outbound_peers": 5,

nearcore/res/example-config-no-gc.json

@@ -29,7 +29,6 @@
     },
     "network": {
         "addr": "0.0.0.0:24567",
-        "external_address": "",
         "boot_nodes": "ed25519:86EtEy7epneKyrcJwSWP7zsisTkfDRH5CFVszt4qiQYw@35.195.32.249:24567,ed25519:BFB78VTDBBfCY4jCP99zWxhXUcFAZqR22oSx2KEr8UM1@35.229.222.235:24567,ed25519:Cw1YyiX9cybvz3yZcbYdG7oDV6D7Eihdfc8eM1e1KKoh@35.195.27.104:24567,ed25519:33g3PZRdDvzdRpRpFRZLyscJdbMxUA3j3Rf2ktSYwwF8@34.94.132.112:24567,ed25519:CDQFcD9bHUWdc31rDfRi4ZrJczxg8derCzybcac142tK@35.196.209.192:24567",
         "max_num_peers": 40,
         "minimum_outbound_peers": 5,

nearcore/src/config.rs

@@ -363,19 +363,36 @@ impl Default for Config {
 
 impl Config {
     pub fn from_file(path: &Path) -> anyhow::Result<Self> {
-        let mut unrecognised_fields = Vec::new();
-        let s = std::fs::read_to_string(path)
+        let contents = std::fs::read_to_string(path)
             .with_context(|| format!("Failed to read config from {}", path.display()))?;
-        let config =
-            serde_ignored::deserialize(&mut serde_json::Deserializer::from_str(&s), |path| {
-                unrecognised_fields.push(path.to_string());
-            })
-            .with_context(|| format!("Failed to deserialize config from {}", path.display()))?;
-
+        let mut unrecognised_fields = Vec::new();
+        let config = serde_ignored::deserialize(
+            &mut serde_json::Deserializer::from_str(&contents),
+            |field| {
+                let field = field.to_string();
+                // TODO(mina86): Remove this deprecation notice some time by the
+                // end of 2022.
+                if field == "network.external_address" {
+                    warn!(
+                        target: "neard",
+                        "{}: {field} is deprecated; please remove it from the config file",
+                        path.display(),
+                    );
+                } else {
+                    unrecognised_fields.push(field);
+                }
+            },
+        )
+        .with_context(|| format!("Failed to deserialize config from {}", path.display()))?;
         if !unrecognised_fields.is_empty() {
-            warn!("{}: encountered unrecognised fields: {:?}", path.display(), unrecognised_fields);
+            let s = if unrecognised_fields.len() > 1 { "s" } else { "" };
+            let fields = unrecognised_fields.join(", ");
+            warn!(
+                target: "neard",
+                "{}: encountered unrecognised field{s}: {fields}",
+                path.display(),
+            );
         }
-
         Ok(config)
     }