Initial commit: simple frontend helper for mortgageFi, basic debt repayment and debt viewing functionality works, tested for both cbbtc and wbtc and not weth

config/web3.ts

@@ -0,0 +1,42 @@
+import { createConfig, http } from 'wagmi';
+import { mainnet, sepolia, base, arbitrum } from 'wagmi/chains';
+import { createWeb3Modal } from '@web3modal/wagmi';
+
+// 1. Get projectId at https://cloud.walletconnect.com
+const projectId = process.env.NEXT_PUBLIC_WALLETCONNECT_PROJECT_ID || '';
+if (!projectId) {
+  // eslint-disable-next-line no-console
+  console.warn('[Web3] Missing NEXT_PUBLIC_WALLETCONNECT_PROJECT_ID. WalletConnect wallet list will be limited.');
+}
+
+// 2. Create wagmiConfig
+const metadata = {
+  name: 'MortgageFi',
+  description: 'Decentralized Mortgage Lending Platform',
+  url: 'https://mortgagefi.app',
+  icons: ['https://mortgagefi.app/logo.png']
+};
+
+export const config = createConfig({
+  chains: [base, arbitrum, mainnet, sepolia],
+  transports: {
+    [base.id]: http(),
+    [arbitrum.id]: http(),
+    [mainnet.id]: http(),
+    [sepolia.id]: http(),
+  },
+  ssr: true,
+});
+
+// 3. Create modal
+export const web3Modal = createWeb3Modal({
+  wagmiConfig: config,
+  projectId: projectId || 'missing_project_id',
+  enableAnalytics: true,
+  enableOnramp: true,
+  themeMode: 'light',
+  themeVariables: {
+    '--w3m-accent': '#4F46E5',
+    '--w3m-font-family': 'Inter, sans-serif',
+  },
+});