The good news is, in 2012 the developer Pieter Wuille created the BIP32 specification at the base of the hierarchical deterministic wallets. Collectively with it, Pieter made a mathematical function to produce a learn key from which to derive all other keys in a deterministic way. Shop your phrase over https://bookmarkinglive.com/story19640202/the-ultimate-guide-to-bip39-seed-phrase-github