Add get unspent tokens function to base wallet

packages/stack/src/wallet/base-wallet.ts

@@ -146,6 +146,21 @@ export abstract class BaseWallet<
    */
   abstract getUnspents(): Promise<BlockchainUTXOs>;
 
+  /**
+   * Fetch all unspents tokens from the blockchain belonging to this wallet.
+   */
+  async getUnspentTokens(): Promise<BlockchainUTXOs> {
+    // Get the unspents.
+    const unspents = await this.getUnspents();
+
+    // Filter to get only the utxos that contain tokens
+    const unspentTokens = unspents.filter((utxo) => {
+      return Boolean(utxo.utxo.output.token);
+    });
+
+    return unspentTokens;
+  };
+
   /**
    * Fetch all unspents from the blockchain belonging to this wallet.
    *