From 38d3446288f8db7bed05bbf3e99298c46d3024a4 Mon Sep 17 00:00:00 2001
From: Benjamin Smith <bh2smith@users.noreply.github.com>
Date: Fri, 11 Oct 2024 23:56:10 +0200
Subject: [PATCH] Inherit Testnet Field from Viem (#136)

---
 src/network/constants.ts   | 13 -------------
 src/network/index.ts       |  8 ++++++++
 tests/unit/network.test.ts | 14 ++++++++++++++
 3 files changed, 22 insertions(+), 13 deletions(-)
 create mode 100644 tests/unit/network.test.ts

diff --git a/src/network/constants.ts b/src/network/constants.ts
index 106ba57..f0dd6cb 100644
--- a/src/network/constants.ts
+++ b/src/network/constants.ts
@@ -1,7 +1,6 @@
 interface ChainInfo {
   currencyIcon?: string;
   icon?: string;
-  testnet: boolean;
   wrappedToken: string;
 }
 
@@ -28,54 +27,46 @@ export const CHAIN_INFO: Record<number, ChainInfo> = {
   1: {
     currencyIcon: ETHER,
     icon: ETHEREUM_ICON,
-    testnet: false,
     wrappedToken: "0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2",
   },
   // Optimism
   10: {
     currencyIcon: ETHER,
     icon: OPTIMISM_ICON,
-    testnet: false,
     wrappedToken: "0x4200000000000000000000000000000000000006",
   },
   // Binance Smart Chain
   56: {
     icon: BINANCE_ICON,
-    testnet: false,
     wrappedToken: "0xbb4CdB9CBd36B01bD1cBaEBF2De08d9173bc095c",
   },
   // Binance Testnet
   97: {
     icon: BINANCE_ICON,
-    testnet: true,
     wrappedToken: "0x094616f0bdfb0b526bd735bf66eca0ad254ca81f",
   },
   // Gnosis Chain
   100: {
     currencyIcon: XDAI,
     icon: GNOSIS_ICON,
-    testnet: false,
     wrappedToken: "0x6a023ccd1ff6f2045c3309768ead9e68f978f6e1",
   },
   // Polygon
   137: {
     icon: POLYGON_ICON,
     currencyIcon: POL,
-    testnet: false,
     wrappedToken: "0x7d1afa7b718fb893db30a3abc0cfc608aacfebb0",
   },
   // Base
   8453: {
     currencyIcon: ETHER,
     icon: BASE_ICON,
-    testnet: false,
     wrappedToken: "0x4200000000000000000000000000000000000006",
   },
   // Gnosis Chiado Testnet
   10200: {
     currencyIcon: XDAI,
     icon: GNOSIS_ICON,
-    testnet: true,
     wrappedToken: "0xb2D0d7aD1D4b2915390Dc7053b9421F735A723E7",
   },
   // Arbitrum
@@ -83,27 +74,23 @@ export const CHAIN_INFO: Record<number, ChainInfo> = {
     currencyIcon: ETHER,
     icon: ARBITRUM_ICON,
     wrappedToken: "0x82af49447d8a07e3bd95bd0d56f35241523fbab1",
-    testnet: false,
   },
   // Base Sepolia
   84532: {
     currencyIcon: ETHER,
     icon: BASE_ICON,
     wrappedToken: "0x4200000000000000000000000000000000000006",
-    testnet: true,
   },
   // Arbitrum Sepolia
   421614: {
     currencyIcon: ETHER,
     icon: ARBITRUM_ICON,
-    testnet: true,
     wrappedToken: "0x980b62da83eff3d4576c647993b0c1d7faf17c73",
   },
   // Sepolia
   11155111: {
     currencyIcon: ETHER,
     icon: ETHEREUM_ICON,
-    testnet: true,
     wrappedToken: "0xD0A1E359811322d97991E03f863a0C30C2cF029C",
   },
 };
diff --git a/src/network/index.ts b/src/network/index.ts
index 636022f..7b811a3 100644
--- a/src/network/index.ts
+++ b/src/network/index.ts
@@ -11,6 +11,7 @@ export interface NetworkFields {
   chainId: number;
   scanUrl: string;
   icon: string | undefined;
+  testnet: boolean;
   nativeCurrency: {
     decimals: number;
     name: string;
@@ -31,6 +32,7 @@ export class Network implements NetworkFields {
   scanUrl: string;
   client: PublicClient;
   icon: string | undefined;
+  testnet: boolean;
   nativeCurrency: {
     decimals: number;
     name: string;
@@ -56,6 +58,7 @@ export class Network implements NetworkFields {
     this.client = createPublicClient({
       transport: http(network.rpcUrl),
     });
+    this.testnet = network.testnet;
     this.nativeCurrency = nativeCurrency;
     this.icon = icon;
   }
@@ -86,6 +89,7 @@ function createNetworkMap(supportedNetworks: Chain[]): NetworkMap {
       chainId: network.id,
       scanUrl: network.blockExplorers?.default.url || "",
       icon,
+      testnet: network.testnet || false,
       nativeCurrency: {
         ...network.nativeCurrency,
         wrappedAddress: chainInfo?.wrappedToken,
@@ -96,3 +100,7 @@ function createNetworkMap(supportedNetworks: Chain[]): NetworkMap {
 
   return networkMap;
 }
+
+export function isTestnet(chainId: number): boolean {
+  return Network.fromChainId(chainId).testnet;
+}
diff --git a/tests/unit/network.test.ts b/tests/unit/network.test.ts
new file mode 100644
index 0000000..0b459c2
--- /dev/null
+++ b/tests/unit/network.test.ts
@@ -0,0 +1,14 @@
+import { isTestnet } from "../../src/";
+describe("network", () => {
+  it("isTestnet", async () => {
+    expect(isTestnet(1)).toBe(false);
+    expect(isTestnet(10)).toBe(false);
+    expect(isTestnet(97)).toBe(true);
+    expect(isTestnet(100)).toBe(false);
+    expect(isTestnet(137)).toBe(false);
+    expect(isTestnet(10200)).toBe(true);
+    expect(isTestnet(84532)).toBe(true);
+    expect(isTestnet(421614)).toBe(true);
+    expect(isTestnet(11155111)).toBe(true);
+  });
+});