# BIP39

JavaScript implementation of [Bitcoin BIP39](https://github.com/bitcoin/bips/blob/master/bip-0039.mediawiki).

## Installation

Add the following to dependencies in `package.json`

```json
"bip39": "github:ProtonMail/bip39#semver:PACKAGE_VERSION",
```

## Example Usage

```ts
import { entropyToMnemonic, mnemonicToEntropy, validateMnemonic } from 'bip39';

const entropy = new Uint8Array(16); // Use a CSPRNG to generate the random bytes
// => Uint8Array(16) [ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, … ]

const mnemonic = await entropyToMnemonic(entropy);
// => abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon about

const recoveredEntropy = await mnemonicToEntropy(mnemonic);
// => Uint8Array(16) [ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, … ]

const isValid = await validateMnemonic(mnemonic);
// => true
```

## API

### `entropyToMnemonic`

Takes `Uint8Array` entropy and outputs a mnemonic based on the wordlist.

### `mnemonicToEntropy`

Takes a mnemonic and outputs the `Uint8Array` entropy.

### `validateMnemonic`

Validates a given mnemonic. Returns `true` if valid and `false` if invalid.

### wordlist

Each function can take a wordlist - a string array of length 2048. If a wordlist is not specified, it will default to [English](https://github.com/ProtonMail/bip39/blob/main/src/wordlists/english.json).


@protontech/bip39

edvincandon

bartbutler

twiss

mmso

epokk

guillaumez

e1a0a0ea

flavien-bonvin

gudmundur-proton

dborghino

mhorejsek

protontech-npm-bot

bip39

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High entropy strings

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@protontech/bip39

BIP39

Installation

Example Usage

API

entropyToMnemonic

mnemonicToEntropy

validateMnemonic

wordlist

Related posts

Feross on Risky Business Weekly Podcast: npm’s Ongoing Supply Chain Attacks

Introducing Tier 1 Reachability: Precision CVE Triage for Enterprise Teams

`entropyToMnemonic`

`mnemonicToEntropy`

`validateMnemonic`