From 83275bf0ad998fe071a674cca231ad99b7b6fbf5 Mon Sep 17 00:00:00 2001
From: 0xFirekeeper <0xFirekeeper@gmail.com>
Date: Wed, 10 Jun 2026 18:17:01 +0700
Subject: [PATCH] Fix Arc Testnet native currency decimals

Change Arc Testnet native currency decimals from 6 to 18 to match the chain's RPC balance encoding.
---
 .changeset/arc-testnet-decimals.md                           | 5 +++++
 .../thirdweb/src/chains/chain-definitions/arc-testnet.ts     | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)
 create mode 100644 .changeset/arc-testnet-decimals.md

diff --git a/.changeset/arc-testnet-decimals.md b/.changeset/arc-testnet-decimals.md
new file mode 100644
index 00000000000..4edf1aee674
--- /dev/null
+++ b/.changeset/arc-testnet-decimals.md
@@ -0,0 +1,5 @@
+---
+"thirdweb": patch
+---
+
+Fix Arc Testnet native currency decimals (USDC) from 6 to 18 to match the chain's RPC balance encoding
diff --git a/packages/thirdweb/src/chains/chain-definitions/arc-testnet.ts b/packages/thirdweb/src/chains/chain-definitions/arc-testnet.ts
index 3f67513ebbb..5a306c2244f 100644
--- a/packages/thirdweb/src/chains/chain-definitions/arc-testnet.ts
+++ b/packages/thirdweb/src/chains/chain-definitions/arc-testnet.ts
@@ -12,6 +12,6 @@ export const arcTestnet = /* @__PURE__ */ defineChain({
   ],
   id: 5042002,
   name: "Arc Testnet",
-  nativeCurrency: { decimals: 6, name: "USDC", symbol: "USDC" },
+  nativeCurrency: { decimals: 18, name: "USDC", symbol: "USDC" },
   testnet: true,
 });