From b0c4cc9cebbf3ee68b4ac665f7c1bf2b75ce7de5 Mon Sep 17 00:00:00 2001
From: ignaciosantise <25931366+ignaciosantise@users.noreply.github.com>
Date: Fri, 30 Jan 2026 16:13:12 -0300
Subject: [PATCH] fix: use URL API for proper query parameter encoding in
 BalanceService

Replace manual URL concatenation with the URL API and searchParams for more reliable and standards-compliant query parameter encoding, especially for the chainId parameter.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
---
 wallets/rn_cli_wallet/src/services/BalanceService.ts | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/wallets/rn_cli_wallet/src/services/BalanceService.ts b/wallets/rn_cli_wallet/src/services/BalanceService.ts
index 5ae136e0..05c74eff 100644
--- a/wallets/rn_cli_wallet/src/services/BalanceService.ts
+++ b/wallets/rn_cli_wallet/src/services/BalanceService.ts
@@ -22,9 +22,12 @@ async function fetchBalanceForChain(
     return [];
   }
 
-  const url = `${baseUrl}${BALANCE_API_PATH}/${address}/balance?projectId=${encodeURIComponent(
-    projectId,
-  )}&currency=usd&chainId=${chainId}&st=walletkit&sv=1.0.0`;
+  const url = new URL(`${BALANCE_API_PATH}/${address}/balance`, baseUrl);
+  url.searchParams.set('projectId', projectId);
+  url.searchParams.set('currency', 'usd');
+  url.searchParams.set('chainId', chainId);
+  url.searchParams.set('st', 'walletkit');
+  url.searchParams.set('sv', '1.0.0');
 
   const response = await fetch(url.toString(), {
     headers: {