Mnemonic class

BIP39: A mnemonic sentence is superior for human interaction compared to the handling of raw binary or hexadecimal representations of a wallet seed.

Constructors

Mnemonic(List<int> entropy, Language language, {String passphrase = ""})

Constructs Mnemonic from entropy bytes.

Mnemonic.fromSentence(String sentence, Language language, {String passphrase = ""})

Constructs Mnemonic from a sentence by retrieving the original entropy.

Mnemonic.generate(Language language, {String passphrase = "", int entropyLength = 256})

Constructs Mnemonic from one of these entropy lengths: 128, 160, 192, 224, 256

Properties

entropy ↔ List<int>

BIP39: The mnemonic must encode entropy in a multiple of 32 bits. With more entropy security is improved but the sentence length increases. The allowed size of _ENT is 128-256 bits.

getter/setter pair

hashCode → int

The hash code for this object.

no setter, inherited

language ↔ Language

The language affect the sentence and the seed generation. BIP39: Since the vast majority of BIP39 wallets supports only the English wordlist, it is strongly discouraged to use non-English wordlists for generating the mnemonic sentences. If you still feel your application really needs to use a localized wordlist, use one of the following instead of inventing your own.

getter/setter pair

passphrase ↔ String

Passphrase is only used on seed generation. BIP39: A user may decide to protect their mnemonic with a passphrase. If a passphrase is not present, an empty string "" is used instead.

getter/setter pair

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

seed → List<int>

BIP39: To create a binary seed from the mnemonic, we use the PBKDF2 function with a mnemonic sentence (in UTF-8 NFKD) used as the password and the string "mnemonic" + passphrase (again in UTF-8 NFKD) used as the salt. The iteration count is set to 2048 and HMAC-SHA512 is used as the pseudo-random function. The length of the derived key is 512 bits (= 64 bytes). This seed can be later used to generate deterministic wallets using BIP-0032 or similar methods.

no setter

sentence → String

BIP39: Use the joined words as a mnemonic sentence.

no setter

words → List<String>

BIP39: Finally, we convert these numbers (indexes) into words.

no setter

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited