From 35d80eec1cca0d9d3d1795d0f6e4f518661f5af5 Mon Sep 17 00:00:00 2001
From: Mononaut <github@monospace.live>
Date: Tue, 6 Jun 2023 11:01:01 -0400
Subject: [PATCH] Fix multiple mined RBF replacements of the same tx

---
 backend/src/api/common.ts | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/backend/src/api/common.ts b/backend/src/api/common.ts
index 37b09a417..07a724f0c 100644
--- a/backend/src/api/common.ts
+++ b/backend/src/api/common.ts
@@ -91,6 +91,14 @@ export class Common {
       if (replaced.size) {
         matches[tx.txid] = { replaced: Array.from(replaced), replacedBy: tx };
       }
+      // remove this tx from the spendMap
+      // prevents the same tx being replaced more than once
+      for (const vin of tx.vin) {
+        const key = `${vin.txid}:${vin.vout}`;
+        if (spendMap.get(key)?.txid === tx.txid) {
+          spendMap.delete(key);
+        }
+      }
     }
     return matches;
   }