Bip39 api https://www.storeboard.com/blogs/ai-for-small-business/browsing-the-globe-of-bitcoin-addresses-the-value-of-bip39/6240727 Checksum generation: A checksum is created from this entropy utilizing SHA-256 hashing, which assists validate the mnemonic's integrity later. For words that have only three letters, there is not any 4th letter. For example While using the word “increase”... https://bookmark-vip.com/story20736681/bip39-derivation-the-5-second-trick-for-bip39-compatible-wallet-https-dzen-ru-bip39-phrase-com