From f845363758251ee1a45d175d10457dba0e7738f0 Mon Sep 17 00:00:00 2001
From: brightfootlimited-collab <brightfootlimited@gmail.com>
Date: Sun, 26 Jul 2026 08:52:09 -0700
Subject: [PATCH] =?UTF-8?q?fix(fee-utils):=20remove=20hardcoded=20XLM=5FPR?=
 =?UTF-8?q?ICE,=20suppress=20USD=20estimate=20when=20price=20unavailable?=
 =?UTF-8?q?=20lib/fee-utils.ts=20used=20a=20hardcoded=20XLM=5FPRICE=20=3D?=
 =?UTF-8?q?=200.12=20constant=20as=20the=20default=20for=20calculateFeeBre?=
 =?UTF-8?q?akdown,=20which=20meant=20estimatedUsd=20was=20always=20emitted?=
 =?UTF-8?q?=20=E2=80=94=20even=20when=20no=20live=20price=20was=20availabl?=
 =?UTF-8?q?e=20=E2=80=94=20using=20a=20stale/fabricated=20value.=20This=20?=
 =?UTF-8?q?made=20the=20fee=20breakdown=20UI=20display=20misleading=20USD?=
 =?UTF-8?q?=20cost=20information=20to=20users.=20Changes:=20-=20Remove=20t?=
 =?UTF-8?q?he=20XLM=5FPRICE=20=3D=200.12=20constant=20-=20Make=20xlmPrice?=
 =?UTF-8?q?=20a=20true=20optional=20param=20(undefined=20by=20default)=20-?=
 =?UTF-8?q?=20Only=20compute=20estimatedUsd=20when=20a=20live=20price=20is?=
 =?UTF-8?q?=20explicitly=20provided;=20otherwise=20return=20undefined=20so?=
 =?UTF-8?q?=20callers=20can=20suppress=20the=20USD=20display=20Call=20site?=
 =?UTF-8?q?s=20in=20app/app/stream/[id]/page.tsx=20and=20components/stream?=
 =?UTF-8?q?s/create-confirmation.tsx=20that=20omit=20xlmPrice=20will=20now?=
 =?UTF-8?q?=20correctly=20receive=20estimatedUsd:=20undefined=20instead=20?=
 =?UTF-8?q?of=20a=20stale=20estimate.=20Closes=20#289?=
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---
 lib/fee-utils.ts | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/lib/fee-utils.ts b/lib/fee-utils.ts
index f778815..2fa5b32 100644
--- a/lib/fee-utils.ts
+++ b/lib/fee-utils.ts
@@ -5,17 +5,17 @@ export interface FeeBreakdown {
   estimatedUsd?: number;
 }
 
-const XLM_PRICE = 0.12; // Average XLM price in USD for estimation
-
 /**
  * Calculate fee breakdown from transaction simulation
  * @param minResourceFee Minimum resource fee from simulation in stroops
- * @param xlmPrice Current XLM price in USD (optional)
+ * @param xlmPrice Current XLM/USD price. Pass the live value from useTokenPrice;
+ *                 omit (or pass undefined) when no price is available and USD
+ *                 estimate should be suppressed.
  * @returns Fee breakdown: base estimate, safety buffer, and total
  */
 export function calculateFeeBreakdown(
   minResourceFee: number,
-  xlmPrice: number = XLM_PRICE,
+  xlmPrice?: number,
 ): FeeBreakdown {
   // Apply 15% buffer to ensure inclusion
   const bufferMultiplier = 1.15;
@@ -23,7 +23,8 @@ export function calculateFeeBreakdown(
   const bufferFee = totalFee - minResourceFee;
 
   const totalXlm = totalFee / 1e7;
-  const estimatedUsd = totalXlm * xlmPrice;
+  const estimatedUsd =
+    xlmPrice !== undefined ? totalXlm * xlmPrice : undefined;
 
   return {
     minFee: minResourceFee,