From f8e46571507a6b54bb81312d8cb0e5911cd06d9d Mon Sep 17 00:00:00 2001
From: AbhilashG12 <abhilashggg15@gmail.com>
Date: Thu, 9 Jul 2026 16:40:05 +0530
Subject: [PATCH 1/2] fix(polymarket-us): prevent websocket connect hangs with
 garbage-collected timeout

---
 core/src/exchanges/polymarket_us/websocket.ts | 19 ++++++++++++++++++-
 1 file changed, 18 insertions(+), 1 deletion(-)

diff --git a/core/src/exchanges/polymarket_us/websocket.ts b/core/src/exchanges/polymarket_us/websocket.ts
index c5e77276..6ac277c8 100644
--- a/core/src/exchanges/polymarket_us/websocket.ts
+++ b/core/src/exchanges/polymarket_us/websocket.ts
@@ -145,7 +145,24 @@ export class PolymarketUSWebSocket {
             socket.on('trade', (msg: SdkTrade) => this.handleTrade(msg));
             socket.on('error', (err: Error) => this.handleError(err));
             socket.on('close', () => this.handleClose());
-            await socket.connect();
+            // Wrap connection in a timeout with proper garbage collection
+            const CONNECTION_TIMEOUT_MS = 15000; // 15s is standard for trading API handshakes
+            let timeoutHandle: NodeJS.Timeout;
+            
+            const timeoutPromise = new Promise<never>((_, reject) => {
+                timeoutHandle = setTimeout(() => {
+                    reject(new Error(`PolymarketUS WebSocket connection timed out after ${CONNECTION_TIMEOUT_MS}ms`));
+                }, CONNECTION_TIMEOUT_MS);
+            });
+
+            try {
+                await Promise.race([
+                    socket.connect(),
+                    timeoutPromise
+                ]);
+            } finally {
+                clearTimeout(timeoutHandle!); // Always clear the timer so the event loop can breathe
+            }
             this.socket = socket;
         })();
 

From 9dc8fedb26dd8739f8a10b0e69dff643c3c82b4d Mon Sep 17 00:00:00 2001
From: Samuel Tinnerholm <samuel.tinnerholm@gmail.com>
Date: Fri, 10 Jul 2026 06:49:34 +0000
Subject: [PATCH 2/2] fix: remove trailing whitespace in polymarket us
 websocket

---
 core/src/exchanges/polymarket_us/websocket.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core/src/exchanges/polymarket_us/websocket.ts b/core/src/exchanges/polymarket_us/websocket.ts
index 6ac277c8..a4676693 100644
--- a/core/src/exchanges/polymarket_us/websocket.ts
+++ b/core/src/exchanges/polymarket_us/websocket.ts
@@ -148,7 +148,7 @@ export class PolymarketUSWebSocket {
             // Wrap connection in a timeout with proper garbage collection
             const CONNECTION_TIMEOUT_MS = 15000; // 15s is standard for trading API handshakes
             let timeoutHandle: NodeJS.Timeout;
-            
+
             const timeoutPromise = new Promise<never>((_, reject) => {
                 timeoutHandle = setTimeout(() => {
                     reject(new Error(`PolymarketUS WebSocket connection timed out after ${CONNECTION_TIMEOUT_MS}ms`));