fix type errors

src/blockchain/provider.ts

@@ -11,12 +11,10 @@ import {
 } from "viem";
 import { sepolia, rootstock } from "viem/chains";
 import { useUser } from "@/composables/useUser";
-
 let publicClient: PublicClient | null = null;
 let walletClient: WalletClient | null = null;
 
-const getPublicClient: PublicClient | null = (onlyRpcProvider = false) => {
-  if (onlyRpcProvider) {
+const getPublicClient = (): PublicClient => {
     const user = useUser();
     const rpcUrl = getProviderUrl();
     return createPublicClient({
@@ -24,21 +22,22 @@ const getPublicClient: PublicClient | null = (onlyRpcProvider = false) => {
         Number(user.networkName.value) === sepolia.id ? sepolia : rootstock,
       transport: http(rpcUrl),
     });
-  }
-  return publicClient;
 };
 
-const getWalletClient: WalletClient | null = () => {
+const getWalletClient = (): WalletClient | null => {
   return walletClient;
 };
 
 const getContract = async (onlyRpcProvider = false) => {
-  const client = getPublicClient(onlyRpcProvider);
+  const client = getPublicClient();
+  if (!client) {
+    throw new Error("Public client is not initialized");
+  }
   const address = getP2PixAddress();
   const abi = p2pix.abi;
   const wallet = getWalletClient();
 
-  const [account] = wallet ? await wallet.getAddresses() : [""];
+  const [account] = wallet ? await wallet.getAddresses() : [null];
 
   return { address, abi, client, wallet, account };
 };