refactor(viem): explicitly type walletClient return type (#2816)

Author: jnsdls

.changeset/rich-emus-watch.md

@@ -0,0 +1,5 @@
+---
+"thirdweb": patch
+---
+
+adapters(viem): explicitly type walletClient return type

packages/thirdweb/src/adapters/viem.ts

@@ -170,7 +170,7 @@ type ToViemWalletClientOptions = {
   chain: Chain;
 };
 
-function toViemWalletClient(options: ToViemWalletClientOptions) {
+function toViemWalletClient(options: ToViemWalletClientOptions): WalletClient {
   const { account, chain, client } = options;
   if (!account) {
     throw new Error("Wallet not connected.");