24 word mnemonic to secret key
This example uses the bip39 JS library so it can be used in the context of a web app. Also, it uses the Stellar SDK, but could be adapted to any wallet SDK I think.
Basically, what I wanted to figure out was how can a crypto account be imported into a wallet application using a 24 word mnemonic phrase. It took me a few hours to figure this out. I relied on the following resources:
This code snippet something I did in a VueJS project. It restores a public/private key pair from a mnemonic phrase.
import * as stellarSdk from "stellar-sdk"; import * as bip39 from "bip39"; // . . . const phrase = '' // set to a 24 word prhase from user input const wordlist = bip39.wordlists["english"]; const rawSecret = bip39.mnemonicToEntropy(phrase, wordlist); const secret = stellarSdk.Keypair.fromRawEd25519Seed( Buffer.from(rawSecret, "hex") ).secret(); console.log(secret);