From 6829e67e15cc4cfcf6b6fe6aab13efee315c6476 Mon Sep 17 00:00:00 2001
From: Mononaut <github@monospace.live>
Date: Sun, 25 Jun 2023 20:38:18 -0400
Subject: [PATCH] Add sanity check for uint32 uid overflow

---
 backend/src/api/mempool-blocks.ts | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/backend/src/api/mempool-blocks.ts b/backend/src/api/mempool-blocks.ts
index c753d2293..ca318bb5d 100644
--- a/backend/src/api/mempool-blocks.ts
+++ b/backend/src/api/mempool-blocks.ts
@@ -374,6 +374,10 @@ class MempoolBlocks {
   }
 
   public async $rustUpdateBlockTemplates(newMempool: { [txid: string]: MempoolTransactionExtended }, added: MempoolTransactionExtended[], removed: MempoolTransactionExtended[]): Promise<void> {
+    // sanity check to avoid approaching uint32 uid overflow
+    if (this.nextUid > 4_000_000_000) {
+      this.resetRustGbt();
+    }
     if (!this.rustInitialized) {
       // need to reset the worker
       await this.$rustMakeBlockTemplates(newMempool, true);