bip39_mnemonic

Description:

bip39 mnemonic

dart-bip39-mnemonic #
Mnemonic code for generating deterministic keys a.k.a. BIP39
Getting started #
dart pub add bip39_mnemonic
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Features #

English
Japanese
Korean
Spanish
Chinese (Simplified)
Chinese (Traditional)
French
Italian
Czech
Portuguese

Usage #
import 'package:bip39_mnemonic/bip39_mnemonic.dart';
import 'package:convert/convert.dart'; // convert bytes to hexadecimal and vice-versa

void main() {
// DO NOT USE THESE DATA!

// Constructs Mnemonic from random secure 256bits entropy with optional passphrase
var mnemonic = Mnemonic.generate(
Language.french,
passphrase: "SomethingR0bùst",
entropyLength: 256,
);
print(mnemonic.sentence);
// million alpaga revivre calmer dogme verdure capsule folie déborder facette lanceur saboter recycler tripler symbole savant rieur jeudi outrager volume situer jardin civil reculer
String hexSeed = hex.encode(mnemonic.seed); // convert to hex
print(hexSeed);
// 7f12a3777d2cbf843f113ba2ed125511237c3c23d5adca17cb9a1036563cd0edca879ff374f224d40ca8a29942955644be61468baf6d84ba46651c5839420fe5

// Constructs a Mnemonic from Entropy
String hexEntropy =
"677765ded2b5f05fd11d9bcc38b863fda3fa06475c77bf1e99a668af355b96e2";
List<int> bytesEntropy = hex.decode(hexEntropy);
var mnemonic2 = Mnemonic(bytesEntropy, Language.english);
print(mnemonic2.sentence);
// guess robot jeans pistol gallery copper dutch recall slow shift body win distance add buddy moment sample visit hat spend viable punch fortune faith

// Constructs a Mnemonic from Sentence/Phrase
String frenchSentence =
"image juteux calculer billard valise billard tortue besace peigne corbeau adroit littoral";
var mnemonic3 = Mnemonic.fromSentence(frenchSentence, Language.french);
print(hex.encode(mnemonic3.entropy));
// 7e71249c8ebf603afb68e1b4c6fc18c8
print(hex.encode(mnemonic3.seed));
// ad926f1f185ba7745f2c98733a83e51717a58ec83ef52c5cd12048aa8fbe4b2511cf12c2a514d2886510f7020b8a0c1c75bedacfbb3b34cd2f3d8d2c038d531e

// Check if a word is BIP39 compatible
print(Language.english.isValid('baguette')); // false

// NFKD word formatting is mandatory in BIP39, please take care: https://github.com/flutter/flutter/issues/104927#issuecomment-1141140735
var french = Language.french;
String nonNfkd = 'échelle';
String nfkd = 'échelle';
print(french.isValid(nfkd)); // true
print(french.isValid(nonNfkd)); // true, because isValid formats input
}
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