Bip39 Mnemonic. Now, at the next stage we use these obtaining and change key bunch to make individual personal keys. Use the above mentioned make private keys and chain code and pass them to the above stated purpose kchild = kpar + hash(Kpar, cpar, i) to crank out specific keys. https://dirstop.com/story21775260/bip39-list-https-linktr-ee-bip39-how-much-you-need-to-expect-you-ll-pay-for-a-good-bip39-wallets