From c2b836b119eeed8727d73bcca5e95055eb93fb1a Mon Sep 17 00:00:00 2001
From: Kashif Smith <1489460+kashifs@users.noreply.github.com>
Date: Mon, 4 Dec 2023 16:14:00 -0500
Subject: [PATCH] bitcoin-tx: Make replaceable value optional

---
 src/bitcoin-tx.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/bitcoin-tx.cpp b/src/bitcoin-tx.cpp
index 8fe2881f6f2..384db221197 100644
--- a/src/bitcoin-tx.cpp
+++ b/src/bitcoin-tx.cpp
@@ -223,8 +223,8 @@ static void MutateTxLocktime(CMutableTransaction& tx, const std::string& cmdVal)
 static void MutateTxRBFOptIn(CMutableTransaction& tx, const std::string& strInIdx)
 {
     // parse requested index
-    int64_t inIdx;
-    if (!ParseInt64(strInIdx, &inIdx) || inIdx < 0 || inIdx >= static_cast<int64_t>(tx.vin.size())) {
+    int64_t inIdx = -1;
+    if (strInIdx != "" && (!ParseInt64(strInIdx, &inIdx) || inIdx < 0 || inIdx >= static_cast<int64_t>(tx.vin.size()))) {
         throw std::runtime_error("Invalid TX input index '" + strInIdx + "'");
     }