* Fetches the lowest-indexed unopened account from a wallet in sequential\r
* order. An account is unopened if it has no frontier block.\r
*\r
- * @param {Rpc|string|URL} rpc - RPC node information required to refresh accounts, calculate PoW, and process blocks\r
+ * @param {Rpc} rpc - RPC node information required to refresh accounts, calculate PoW, and process blocks\r
* @param {number} batchSize - Number of accounts to fetch and check per RPC callout\r
* @param {number} from - Account index from which to start the search\r
* @returns {Promise<Account>} The lowest-indexed unopened account belonging to the wallet\r