# Reducing Costs With HD Wallets How HD wallets cut the cost of running many addresses: one seed, unlimited derived addresses, and far less overhead than managing separate keys. *Published 2023-06-21* **How HD wallets function** Traditional cryptocurrency wallets generate a single address for each cryptocurrency transaction. This means that managing multiple addresses or tracking several transactions across different accounts is not possible. HD wallets solve this issue and allow generating an unlimited number of addresses. In an HD wallet, a master seed or master key is initially generated. From this seed, a series of child keys are derived using a mathematical algorithm. Each child key can generate a unique cryptocurrency address. By using this hierarchical structure, all addresses and private keys can be derived from the master seed. ![Diagram of an HD wallet derivation path: a seed produces a master extended key, which branches by purpose, then mainnet or testnet, then wallet account, and finally into receive and change paths that end in individual addresses such as m/0'/0'/0'/0/0.]() The advantage of an HD wallet is that you only need to back up the master seed once, and it can be used to recover all the addresses and funds associated with the wallet. It eliminates the need to back up each individual private key or address separately. The master key pair for [HD wallets](https://developers.cryptoapis.io/technical-documentation/api/blockchain-data/hd-wallets/get-hd-wallet-xpub-ypub-zpub-details) typically consists of an extended public key (xPub) and an extended private key (xPriv). While the xPub may display the balances of all the public keys in the wallet, the xPriv generates all of the private keys. An xPub is the source of all public addresses, so it must be managed with care. HD wallets also provide enhanced privacy. Since all addresses are derived from the master seed, it is more difficult to link different addresses together and associate them with a single user or wallet. This feature enhances security and makes it easier to manage and organize multiple accounts or addresses - you can refer to our detailed blog post on [how to manage your HD wallet with Crypto APIs for further details](https://cryptoapis.io/blog/118-hd-wallet-management-with-crypto-apis). **Saving money using HD wallets** Using HD wallets does not inherently lead to direct monetary savings. The reason is HD wallet attributes are associated with the effective management of funds and their protection. However, the efficiency of this type of wallets is what may lead to certain savings. Some of the indirect contributions towards customers` savings are as follows: - Address Reuse Prevention - new addresses for each transaction are generated by the HD wallets, which enhance privacy and security. This feature is avoiding the reuse of addresses, which drastically limits the possibilities of potential attacks or scams that can result in financial losses - Fees Optimization - Adjustments on transaction fees are enabled in most of the HD wallets. Staying informed about network congestion and setting a limit on the fees gives users control on their spending. Excessive fees are prevented and at the same time you can avoid potential delays that are caused by low fees. - Accessibility and Control - You have direct control over your funds since HD wallets operate as self-custody wallets. This removes the need for intermediaries and increases the control of the wallet owner, eliminating the need to incur additional fees or charges. In addition, savings are dependent on other factors which are inclusive but not limited to network conditions, the specific wallet software you use, one`s own knowledge and decision-making skills, market fluctuations, as well as other factors. **Addressing HD wallet weak points with Crypto APIs** The benefits of the hierarchical deterministic wallets are significant, especially when it comes to security and privacy. Despite the benefits, there are certain limitations which may prevent users from obtaining the necessary information for them. Crypto APIs blockchain infrastructure solutions provide blockchain data which companies and enterprises can facilitate in regards to their users wallet management and can guarantee accurate information. Learn more about how Crypto APIs software solutions can help your business [by contacting our team.](https://cryptoapis.io/contacts) --- More on the [Crypto APIs blog](https://cryptoapis.io/blog), or see the [products](https://cryptoapis.io/products) this is built on.