From 4d0429b78662ac1b8fcb0fd6831e66a0c267da92 Mon Sep 17 00:00:00 2001
From: softsimon <softsimon@protonmail.com>
Date: Fri, 2 Apr 2021 00:30:51 +0400
Subject: [PATCH] Fix for duplicate cpfp ancestors. fixes #414

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

diff --git a/backend/src/api/common.ts b/backend/src/api/common.ts
index 130e0205d..189b93194 100644
--- a/backend/src/api/common.ts
+++ b/backend/src/api/common.ts
@@ -113,6 +113,10 @@ export class Common {
   private static findAllParents(tx: TransactionExtended, memPool: { [txid: string]: TransactionExtended }): TransactionExtended[] {
     let parents: TransactionExtended[] = [];
     tx.vin.forEach((parent) => {
+      if (parents.find((p) => p.txid === parent.txid)) {
+        return;
+      }
+
       const parentTx = memPool[parent.txid];
       if (parentTx) {
         if (tx.bestDescendant && tx.bestDescendant.fee / (tx.bestDescendant.weight / 4) > parentTx.feePerVsize) {