Struct bip39::Mnemonic

pub struct Mnemonic { /* fields omitted */ }

The primary type in this crate, most tasks require creating or using one.

To create a new Mnemonic from a randomly generated key, call Mnemonic::new().

To get a Mnemonic instance for an existing mnemonic phrase, including those generated by other software or hardware wallets, use Mnemonic::from_phrase().

You can get the HD wallet Seed from a Mnemonic by calling Seed::new(). From there you can either get the raw byte value with Seed::as_bytes(), or the hex representation using Rust formatting: format!("{:X}", seed).

You can also get the original entropy value back from a Mnemonic with Mnemonic::entropy(), but beware that the entropy value is not the same thing as an HD wallet seed, and should never be used that way.

Mnemonic implements Zeroize, so it’s bytes will be zeroed when it’s dropped.

Implementations

impl Mnemonic

pub fn new(mtype: MnemonicType, lang: Language) -> Mnemonic

Generates a new Mnemonic

Use Mnemonic::phrase() to get an str slice of the generated phrase.

Example

use bip39::{Mnemonic, MnemonicType, Language};

let mnemonic = Mnemonic::new(MnemonicType::Words12, Language::English);
let phrase = mnemonic.phrase();

println!("phrase: {}", phrase);

assert_eq!(phrase.split(" ").count(), 12);

pub fn from_entropy(entropy: &[u8], lang: Language) -> Result<Mnemonic, Error>

Create a Mnemonic from pre-generated entropy

Example

use bip39::{Mnemonic, MnemonicType, Language};

let entropy = &[0x33, 0xE4, 0x6B, 0xB1, 0x3A, 0x74, 0x6E, 0xA4, 0x1C, 0xDD, 0xE4, 0x5C, 0x90, 0x84, 0x6A, 0x79];
let mnemonic = Mnemonic::from_entropy(entropy, Language::English).unwrap();

assert_eq!("crop cash unable insane eight faith inflict route frame loud box vibrant", mnemonic.phrase());
assert_eq!("33E46BB13A746EA41CDDE45C90846A79", format!("{:X}", mnemonic));

pub fn from_phrase(phrase: &str, lang: Language) -> Result<Mnemonic, Error>

Create a Mnemonic from an existing mnemonic phrase

The phrase supplied will be checked for word length and validated according to the checksum specified in BIP0039

Example

use bip39::{Mnemonic, Language};

let phrase = "park remain person kitchen mule spell knee armed position rail grid ankle";
let mnemonic = Mnemonic::from_phrase(phrase, Language::English).unwrap();

assert_eq!(phrase, mnemonic.phrase());

pub fn validate(phrase: &str, lang: Language) -> Result<(), Error>

Validate a mnemonic phrase

The phrase supplied will be checked for word length and validated according to the checksum specified in BIP0039.

Example

use bip39::{Mnemonic, Language};

let test_mnemonic = "park remain person kitchen mule spell knee armed position rail grid ankle";

assert!(Mnemonic::validate(test_mnemonic, Language::English).is_ok());

pub fn phrase(&self) -> &str

Get the mnemonic phrase as a string reference.

pub fn into_phrase(self) -> String

Consume the Mnemonic and return the phrase as a String.

pub fn entropy(&self) -> &[u8]

Get the original entropy value of the mnemonic phrase as a slice.

Example

use bip39::{Mnemonic, Language};

let phrase = "park remain person kitchen mule spell knee armed position rail grid ankle";

let mnemonic = Mnemonic::from_phrase(phrase, Language::English).unwrap();

let entropy: &[u8] = mnemonic.entropy();

Note: You shouldn’t use the generated entropy as secrets, for that generate a new Seed from the Mnemonic.

pub fn language(&self) -> Language

Get the Language

Trait Implementations

impl AsRef<str> for Mnemonic

fn as_ref(&self) -> &str

Performs the conversion.

impl Clone for Mnemonic

fn clone(&self) -> Mnemonic

Returns a copy of the value.

pub fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Mnemonic

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for Mnemonic

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Drop for Mnemonic

fn drop(&mut self)

Executes the destructor for this type.

impl From<Mnemonic> for String

fn from(val: Mnemonic) -> String

Performs the conversion.

impl LowerHex for Mnemonic

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl UpperHex for Mnemonic

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Zeroize for Mnemonic

fn zeroize(&mut self)

Zero out this object from memory using Rust intrinsics which ensure the zeroization operation is not “optimized away” by the compiler.