Bip39 Wallet. Now, at the next level we use these getting and change crucial bunch to produce unique private keys. Use the above produce personal keys and chain code and move them to the above mentioned talked about functionality kchild = kpar + hash(Kpar, cpar, i) to produce personal keys. https://socialicus.com/story4549656/bip39-mnemonic-https-linktr-ee-bip39-the-best-side-of-bip39