feat: add requiredChains support

src/lib/constants.ts

@@ -111,6 +111,18 @@ export const USE_WALLET: boolean = true;
  */
 export const ANALYTICS_ENABLED: boolean = true;
 
+/**
+ * Required chains for the mini app.
+ *
+ * Contains an array of CAIP-2 identifiers for blockchains that the mini app requires.
+ * If the host does not support all chains listed here, it will not render the mini app.
+ * If empty or undefined, the mini app will be rendered regardless of chain support.
+ * 
+ * Supported chains: eip155:1, eip155:137, eip155:42161, eip155:10, eip155:8453,
+ * solana:mainnet, solana:devnet
+ */
+export const APP_REQUIRED_CHAINS: string[] = [];
+
 // PLEASE DO NOT UPDATE THIS
 export const SIGNED_KEY_REQUEST_VALIDATOR_EIP_712_DOMAIN = {
   name: 'Farcaster SignedKeyRequestValidator',

src/lib/utils.ts

@@ -13,6 +13,7 @@ import {
   APP_TAGS, APP_URL,
   APP_WEBHOOK_URL,
   APP_ACCOUNT_ASSOCIATION,
+  APP_REQUIRED_CHAINS,
 } from './constants';
 
 export function cn(...inputs: ClassValue[]) {
@@ -56,6 +57,7 @@ export async function getFarcasterDomainManifest(): Promise<Manifest> {
       description: APP_DESCRIPTION,
       primaryCategory: APP_PRIMARY_CATEGORY,
       tags: APP_TAGS,
+      requiredChains: APP_REQUIRED_CHAINS.length > 0 ? APP_REQUIRED_CHAINS : undefined,
     },
   };
 }