Update server/status.js

Add Fulcrum query diagnostics

server/status.js

@@ -10,6 +10,7 @@ function queryFulcrum(fulcrumUrl, method, params = []) {
       resolve({
         ok: false,
         result: null,
+        error: 'Fulcrum URL is not configured',
       });
       return;
     }
@@ -22,6 +23,7 @@ function queryFulcrum(fulcrumUrl, method, params = []) {
       resolve({
         ok: false,
         result: null,
+        error: 'Invalid Fulcrum URL',
       });
       return;
     }
@@ -30,6 +32,7 @@ function queryFulcrum(fulcrumUrl, method, params = []) {
       resolve({
         ok: false,
         result: null,
+        error: 'Fulcrum URL must use tcp://',
       });
       return;
     }
@@ -41,6 +44,7 @@ function queryFulcrum(fulcrumUrl, method, params = []) {
       resolve({
         ok: false,
         result: null,
+        error: 'Fulcrum URL is missing host or port',
       });
       return;
     }
@@ -64,18 +68,28 @@ function queryFulcrum(fulcrumUrl, method, params = []) {
     socket.setTimeout(fulcrumTimeoutMs);
 
     socket.on('connect', () => {
-      socket.write(
+      console.log(
-        JSON.stringify({
+        `Fulcrum connected for ${method} (${host}:${fulcrumPort})`,
+      );
+
+      const request = JSON.stringify({
         jsonrpc: '2.0',
         id: 1,
         method,
         params,
-        }) + '\n',
+      }) + '\n';
-      );
+
+      console.log(`Sending Fulcrum request: ${request.trim()}`);
+
+      socket.write(request);
     });
 
     socket.on('data', (data) => {
-      response += data.toString();
+      const chunk = data.toString();
+
+      console.log(`Fulcrum response data: ${chunk.trim()}`);
+
+      response += chunk;
 
       const lines = response.split('\n');
 
@@ -91,10 +105,17 @@ function queryFulcrum(fulcrumUrl, method, params = []) {
         }
 
         if (message.error) {
+          console.error(
+            `Fulcrum returned an error for ${method}:`,
+            JSON.stringify(message.error),
+          );
+
           finish({
             ok: false,
             result: null,
+            error: message.error,
           });
+
           return;
         }
 
@@ -102,30 +123,48 @@ function queryFulcrum(fulcrumUrl, method, params = []) {
           finish({
             ok: true,
             result: message.result,
+            error: null,
           });
+
           return;
         }
       }
     });
 
     socket.on('timeout', () => {
+      console.error(
+        `Fulcrum request timed out after ${fulcrumTimeoutMs}ms: ${method}`,
+      );
+
       finish({
         ok: false,
         result: null,
+        error: 'Connection timed out',
       });
     });
 
-    socket.on('error', () => {
+    socket.on('error', (error) => {
+      console.error(
+        `Fulcrum socket error for ${method}:`,
+        error.message,
+      );
+
       finish({
         ok: false,
         result: null,
+        error: error.message,
       });
     });
 
-    socket.on('close', () => {
+    socket.on('close', (hadError) => {
+      console.log(
+        `Fulcrum socket closed for ${method}; hadError=${hadError}`,
+      );
+
       finish({
         ok: false,
         result: null,
+        error: 'Connection closed before a response was received',
       });
     });
   });
@@ -145,6 +184,7 @@ async function getFulcrumStatus(fulcrumUrl) {
       url: fulcrumUrl,
       serverVersion: null,
       blockchainHeight: null,
+      error: version.error,
     };
   }
 
@@ -163,6 +203,7 @@ async function getFulcrumStatus(fulcrumUrl) {
       headers.ok && headers.result
         ? headers.result.height ?? null
         : null,
+    error: headers.ok ? null : headers.error,
   };
 }