From eadfba4cab0b89f16906c3b6dedd93242db5f1cf Mon Sep 17 00:00:00 2001
From: Ryan Goree <goree.ryan@gmail.com>
Date: Fri, 30 Aug 2024 01:05:42 -0500
Subject: [PATCH] Fix `useAppConfig` (#1431)

---
 .../src/chains/isMainnetChain.ts                 | 11 +++++++++++
 .../src/ui/appconfig/useAppConfig.ts             | 16 ++++++++--------
 2 files changed, 19 insertions(+), 8 deletions(-)
 create mode 100644 apps/hyperdrive-trading/src/chains/isMainnetChain.ts

diff --git a/apps/hyperdrive-trading/src/chains/isMainnetChain.ts b/apps/hyperdrive-trading/src/chains/isMainnetChain.ts
new file mode 100644
index 000000000..b7b431b9e
--- /dev/null
+++ b/apps/hyperdrive-trading/src/chains/isMainnetChain.ts
@@ -0,0 +1,11 @@
+import { gnosis, mainnet } from "viem/chains";
+
+/**
+ * Checks if the given chain ID corresponds to a mainnet chain.
+ * @param chainId - The chain ID to check.
+ * @returns True if the chain ID corresponds to a mainnet chain, false otherwise.
+ */
+export function isMainnetChain(chainId: number): boolean {
+  const mainnetChainIds: number[] = [mainnet.id, gnosis.id];
+  return mainnetChainIds.includes(chainId);
+}
diff --git a/apps/hyperdrive-trading/src/ui/appconfig/useAppConfig.ts b/apps/hyperdrive-trading/src/ui/appconfig/useAppConfig.ts
index 67f4a0f9a..e5a1b4ff1 100644
--- a/apps/hyperdrive-trading/src/ui/appconfig/useAppConfig.ts
+++ b/apps/hyperdrive-trading/src/ui/appconfig/useAppConfig.ts
@@ -1,6 +1,6 @@
 import { AppConfig, appConfig } from "@hyperdrive/appconfig";
 import { useMemo } from "react";
-import { isTestnetChain } from "src/chains/isTestnetChain";
+import { isMainnetChain } from "src/chains/isMainnetChain";
 import { useChainId } from "wagmi";
 
 export function useAppConfig(): AppConfig {
@@ -24,24 +24,24 @@ export function useAppConfig(): AppConfig {
     // registries
     for (const [chainIdString, registry] of Object.entries(registries)) {
       const chainId = +chainIdString;
-      if (isTestnetChain(chainId)) {
-        testnetConfig.registries[chainId] = registry;
-      } else {
+      if (isMainnetChain(chainId)) {
         mainnetConfig.registries[chainId] = registry;
+      } else {
+        testnetConfig.registries[chainId] = registry;
       }
     }
 
     // hyperdrives
     for (const hyperdrive of hyperdrives) {
-      if (isTestnetChain(hyperdrive.chainId)) {
-        testnetConfig.hyperdrives.push(hyperdrive);
-      } else {
+      if (isMainnetChain(hyperdrive.chainId)) {
         mainnetConfig.hyperdrives.push(hyperdrive);
+      } else {
+        testnetConfig.hyperdrives.push(hyperdrive);
       }
     }
 
     return { testnetConfig, mainnetConfig };
   }, []);
 
-  return isTestnetChain(chainId) ? testnetConfig : mainnetConfig;
+  return isMainnetChain(chainId) ? mainnetConfig : testnetConfig;
 }