diff --git a/CircleModularWalletsCore/Sources/Accounts/Implementations/Web3swiftLocalAccount.swift b/CircleModularWalletsCore/Sources/Accounts/Implementations/Web3swiftLocalAccount.swift
index 32716ef..d12494d 100644
--- a/CircleModularWalletsCore/Sources/Accounts/Implementations/Web3swiftLocalAccount.swift
+++ b/CircleModularWalletsCore/Sources/Accounts/Implementations/Web3swiftLocalAccount.swift
@@ -57,8 +57,6 @@ class Web3swiftLocalAccount: Account {
     /// - Parameter privateKeyHex: The hex string representation of the private key.
     /// - Throws: An `BaseError` if the private key is invalid or cannot be converted to Data.
     convenience init(privateKeyHex: String) throws {
-        let privateKey: Data
-
         guard let privateKey = HexUtils.hexToData(hex: privateKeyHex) else {
             throw BaseError(shortMessage: "Invalid private key hex string")
         }
diff --git a/CircleModularWalletsCore/Sources/Chains/ArcTestnet.swift b/CircleModularWalletsCore/Sources/Chains/ArcTestnet.swift
new file mode 100644
index 0000000..fc18167
--- /dev/null
+++ b/CircleModularWalletsCore/Sources/Chains/ArcTestnet.swift
@@ -0,0 +1,29 @@
+//
+// Copyright (c) 2025, Circle Internet Group, Inc. All rights reserved.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+
+import Foundation
+
+public let ArcTestnet = _ArcTestnet()
+
+public struct _ArcTestnet: Chain {
+
+    public let chainId: Int = 5042002
+
+    public let blockchain: String = "ARC-TESTNET"
+
+}
diff --git a/CircleModularWalletsCore/Sources/Helpers/Constants.swift b/CircleModularWalletsCore/Sources/Helpers/Constants.swift
index 7a35562..d4fc2de 100644
--- a/CircleModularWalletsCore/Sources/Helpers/Constants.swift
+++ b/CircleModularWalletsCore/Sources/Helpers/Constants.swift
@@ -27,20 +27,21 @@ let CIRCLE_SMART_ACCOUNT_VERSION: [String: String] = [
 ]
 
 let CONTRACT_ADDRESS: [String: String] = [
-    PolygonToken.USDC.name: "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
     ArbitrumToken.USDC.name: "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
     ArbitrumToken.ARB.name: "0x912CE59144191C1204E64559FE8253a0e49E6548",
     AvalancheToken.USDC.name: "0xB97EF9Ef8734C71904D8002F8b6Bc66Dd9c48a6E",
     BaseToken.USDC.name: "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
     OptimismToken.USDC.name: "0x0b2c639c533813f4aa9d7837caf62653d097ff85",
     OptimismToken.OP.name: "0x4200000000000000000000000000000000000042",
+    PolygonToken.USDC.name: "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
     UnichainToken.USDC.name: "0x078D782b760474a361dDA0AF3839290b0EF57AD6",
 
-    PolygonAmoyToken.USDC.name: "0x41e94eb019c0762f9bfcf9fb1e58725bfb0e7582",
     ArbitrumSepoliaToken.USDC.name: "0x75faf114eafb1BDbe2F0316DF893fd58CE46AA4d",
+    ArcTestnetToken.USDC.name: "0x3600000000000000000000000000000000000000",
     AvalancheFujiToken.USDC.name: "0x5425890298aed601595a70ab815c96711a31bc65",
     BaseSepoliaToken.USDC.name: "0x036CbD53842c5426634e7929541eC2318f3dCF7e",
     OptimismSepoliaToken.USDC.name: "0x5fd84259d66Cd46123540766Be93DFE6D43130D7",
+    PolygonAmoyToken.USDC.name: "0x41e94eb019c0762f9bfcf9fb1e58725bfb0e7582",
     UnichainSepoliaToken.USDC.name: "0x31d0220469e10c4E71834a79b1f276d740d3768F",
 ]
 
diff --git a/CircleModularWalletsCore/Sources/Models/Token.swift b/CircleModularWalletsCore/Sources/Models/Token.swift
index 7b2e1aa..74f9c80 100644
--- a/CircleModularWalletsCore/Sources/Models/Token.swift
+++ b/CircleModularWalletsCore/Sources/Models/Token.swift
@@ -108,6 +108,18 @@ public enum ArbitrumSepoliaToken: String {
     }
 }
 
+public enum ArcTestnetToken: String {
+    case USDC
+
+    public var chainId: Int {
+        return ArcTestnet.chainId
+    }
+
+    public var name: String {
+        return "ArcTestnet_\(self.rawValue)"
+    }
+}
+
 public enum AvalancheFujiToken: String {
     case USDC
 
diff --git a/Package.swift b/Package.swift
index e070dd9..23634b6 100644
--- a/Package.swift
+++ b/Package.swift
@@ -22,7 +22,7 @@ import PackageDescription
 let package = Package(
     name: "CircleModularWalletsCore",
     platforms: [
-        .iOS(.v16)
+        .macOS("13.5"), .iOS(.v16)
     ],
     products: [
         .library(