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| import { base64url } from '@scure/base'; | |
| import { entropyToMnemonic } from '@scure/bip39'; | |
| import { wordlist } from '@scure/bip39/wordlists/english'; | |
| // Function to convert Base64URL string to Uint8Array | |
| function base64UrlToUint8Array(b64url: string): Uint8Array { | |
| return base64url.decode(b64url + '='.repeat((4 - (b64url.length % 4)) % 4)); | |
| } | |
| // Function to convert the private key to a BIP39 mnemonic | |
| function privateKeysToMnemonic(combinedPrivKey: string): { privateKey: string, mnemonic: string } { | |
| // Split the combined private key into two Base64URL strings | |
| const b64urlpks = combinedPrivKey.split(':'); | |
| // Decode the two Base64URL strings to Uint8Arrays | |
| const b64urlpk1 = b64urlpks[0]; | |
| const b64urlpk2 = b64urlpks[1]; | |
| // Convert the two Base64URL strings to Uint8Arrays | |
| const privateKey1 = base64UrlToUint8Array(b64urlpk1); | |
| const privateKey2 = base64UrlToUint8Array(b64urlpk2); | |
| // Check if the private keys are 32 bytes each | |
| if (privateKey1.length === 32 && privateKey2.length === 32) { | |
| // Convert the each 32-byte private key to a 24-word mnemonic | |
| const m1 = entropyToMnemonic(privateKey1, wordlist); | |
| const m2 = entropyToMnemonic(privateKey2, wordlist); | |
| // Combine the two mnemonics and return 48-word mnemonic | |
| return { privateKey: combinedPrivKey, mnemonic: `${m1} ${m2}` }; | |
| } else { | |
| throw new Error('Unexpected private key length. Expected 32 bytes.'); | |
| } | |
| } | |
| try { | |
| const privKey0 = {}; // Insert the #0 private key here | |
| const privKeySig = {}; // Insert the #sig private key here | |
| const { privateKey, mnemonic } = privateKeysToMnemonic(`${privKey0}:${privKeySig}`); | |
| console.log('combined privateKeys', privateKey); | |
| console.log('combined mnemonics', mnemonic); | |
| } catch (error) { | |
| console.error('Error:', error); | |
| } |
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