diff --git a/src/coinbase/wallet.ts b/src/coinbase/wallet.ts
index 23cddb82..09edd5e8 100644
--- a/src/coinbase/wallet.ts
+++ b/src/coinbase/wallet.ts
@@ -8,8 +8,17 @@ import { Address } from "./address";
 import { Coinbase } from "./coinbase";
 import { ArgumentError, InternalError } from "./errors";
 import { FaucetTransaction } from "./faucet_transaction";
+import { AddressAPIClient, WalletAPIClient } from "./types";
 import { convertStringToHex } from "./utils";
 
+/**
+ * The Wallet API client types.
+ */
+type WalletClients = {
+  wallet: WalletAPIClient;
+  address: AddressAPIClient;
+};
+
 /**
  * A representation of a Wallet. Wallets come with a single default Address, but can expand to have a set of Addresses,
  * each of which can hold a balance of one or more Assets. Wallets can create new Addresses, list their addresses,
@@ -41,6 +50,7 @@ export class Wallet {
    * Instead, use User.createWallet.
    *
    * @constructs Wallet
+   * @throws {ArgumentError} If the model or client is not provided.
    * @throws {InternalError} - If address derivation or caching fails.
    * @throws {APIError} - If the request fails.
    * @returns A promise that resolves with the new Wallet object.
@@ -52,7 +62,7 @@ export class Wallet {
       },
     });
 
-    const wallet = await Wallet.init(walletData.data!);
+    const wallet = await Wallet.init(walletData.data);
 
     await wallet.createAddress();
     await wallet.reload();
@@ -80,7 +90,6 @@ export class Wallet {
     if (!model) {
       throw new ArgumentError("Wallet model cannot be empty");
     }
-
     if (!seed) {
       seed = bip39.generateMnemonic();
     }