DashPhrase.js

Secure HD Wallet Recovery Phrase Generator for that works in Node, Bundlers, and Browsers.

BIP-39-compatible
uses the standard "mnemonic" dictionary for Base2048 words

Lightweight. Zero dependencies. 20kb (17kb min, 7.4kb gz) ~150 LoC.
(most of the package weight is due to the base2048 word list)

Features & Use Cases

• CLI
• Base2048 (BIP-0039 compliant)
• Easy to retype on different devices
• Create many, distinct seeds from a single recovery phrase
• Keys for AES Encryption & Decryption
• Air Gap security
• Cryptocurrency wallets

Target Entropy	Number of Words	Total Bits
128-bit	12 words @ 11 bits each	= 132 bits (128 bits + 4-bit checksum)
160-bit	15 words @ 11 bits each	= 165 bits (160 bits + 5-bit checksum)
192-bit	18 words @ 11 bits each	= 198 bits (192 bits + 6-bit checksum)
224-bit	21 words @ 11 bits each	= 231 bits (224 bits + 7-bit checksum)
256-bit	24 words @ 11 bits each	= 264 bits (256 bits + 8-bit checksum)

Install

CLI

See dashphrase-cli:

• https://github.com/dashhive/dashphrase-cli

Node, Bun, & Bundlers

npm install --save dashphrase@1.2.2

"use strict";

let DashPhrase = require("dashphrase");

Browsers

<script src="https://unpkg.com/dashphrase@1.2.2/dashphrase.js"></script>
<script type="module">
  "use strict";

  let DashPhrase = window.DashPhrase;
  // ...
</script>

Usage

let recoveryPhrase = await DashPhrase.generate(128);
// cat swing flag economy
// stadium alone churn speed
// unique patch report train

let seedBytes = await DashPhrase.toSeed(recoveryPhrase);
// Uint8Array[64] (suitable for use with importKey for AES, etc)

let fooSeedBytes = await DashPhrase.toSeed(recoveryPhrase, "foo");
// Uint8Array[64] (a completely different seed, determined by "foo")

Values to use for Testing, Demos, Development, and Debugging:

DashPhrase.ZOOMONIC;
DashPhrase.ZECRET;
DashPhrase.ZEED;
DashPhrase.CATMONIC;

Test Fixtures

Zoomonic

The canonical DASH Recovery Phrase (mnemonic), Secret Salt, & Seed test values are:

zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo wrong

That's eleven (11) 'zoo's and one (1) 'wrong'.

If we decode that, we get the "input entropy".
For extra entropy / projection, we can also use a "secret salt".
If we run the appropriate Key Derivation on those we the "seed".
Described as JSON:

With secret salt:

{
  "inputEntropy": "ffffffffffffffffffffffffffffffff",
  "recoveryPhrase": "zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo wrong",
  "secretSalt": "TREZOR",
  "seed": "ac27495480225222079d7be181583751e86f571027b0497b5b5d11218e0a8a13332572917f0f8e5a589620c6f15b11c61dee327651a14c34e18231052e48c069"
}

Empty secret salt:

{
  "inputEntropy": "ffffffffffffffffffffffffffffffff",
  "recoveryPhrase": "zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo wrong",
  "secretSalt": "",
  "seed": "b6a6d8921942dd9806607ebc2750416b289adea669198769f2e15ed926c3aa92bf88ece232317b4ea463e84b0fcd3b53577812ee449ccc448eb45e6f544e25b6"
}

Catmonic

Or, for the times you need something that looks random:

cat swing flag economy stadium alone churn speed unique patch report train

API

• generate
  • encode
• verify (checksum)
  • decode
• toSeed
• base2048.includes
• Errors
  • E_UNKNOWN_WORD
  • E_BAD_CHECKSUM
• CATMONIC
• ZOOMONIC
• ZECRET
• ZEED

DashPhrase.generate(bitlen)

Generate a "Base2048" recovery phrase.
(each word represents 11 bits of entropy)

await DashPhrase.generate(bitLen); // *128*, 160, 192, 224, or 256

DashPhrase.encode(bytes)

Encode an array of 16, 20, 24, 28, or 32 bytes (typically a Uint8Array) into a recovery phrase using the Base2048 word list dictionary.

let bytes = Uint8Array.from([0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255]);

await DashPhrase.encode(bytes);
// "abstract way divert acid useless legend advance theme youth"

DashPhrase.verify(recoveryPhrase)

We all make mistakes. Especially typos.

Running the checksum can't guarantee that the recovery phrase is correct, but most typos - such as brocolli instead of broccoli - will cause it to fail, so that's a start.
(although this does check the checksum as well)

let recoveryPhrase = "often delay margin arch ...";
await DashPhrase.verify(recoveryPhrase); // true

let recoveryPhrase = "often delay margin arch TYPO";
await DashPhrase.verify(recoveryPhrase).catch(function (err) {
  // checksum failed?
  throw err;
});

DashPhrase.decode(words, { verify: true })

Decode an string of space-delimited words from the Base2048 dictionary into a Uint8Array.

This will throw an error if any non-Base2048-compatible words are used, or if the checksum does not match.

let words = "abstract way divert acid useless legend advance theme youth";

let entropy = await DashPhrase.decode(words);
// Uint8Array[12] <0, 255, 0, 255, 0, 255, 0, 255, 0, 255, 0, 255>

DashPhrase.toSeed(recoveryPhrase, saltPassword, { verify: true })

Generate a private key seed (generically useful as an encryption key) based on the recovery phrase (mnemonic) and some other string - whether a salt, a password, another recovery phrase or secret, or an id of some kind.

await DashPhrase.toSeed(recoveryPhrase, saltPassword || ""); // Uint8Array[64]

If you'd like to skip the word and checksum checks, pass { verify: false }.

DashPhrase.base2048.includes(word)

Check if a given word exists in the base2048 dictionary.

DashPhrase.base2048.includes("broccoli"); // true

DashPhrase.base2048.includes("brocolli"); // false

Get all misspelled words

"hammer spoon brocolli zoo".split(" ").filter(function (word) {
  return word && !DashPhrase.base2048.includes(word);
});
// [ "brocolli" ]

Errors

• E_UNKNOWN_WORD - at least one the given words is not in the word list
• E_BAD_CHECKSUM - words were good, but checksum failed

DashPhrase.CATMONIC

A secondary Recovery Phrase Mnemonic for documentation, examples, testing, etc.
(use when you need something that appears more random)

cat swing flag economy stadium alone churn speed unique patch report train

TREZOR

deb5f45449e615feff5640f2e49f933ff51895de3b4381832b3139941c57b59205a42480c52175b6efcffaa58a2503887c1e8b363a707256bdd2b587b46541f5

(included in canonical test vector, chosen for being friendly & pleasant)
(and still fits in 80 characters)
(and everybody loves cats)
(except me)

DashPhrase.ZOOMONIC

The Recovery Phrase Mnemonic to use for documentation, examples, testing, etc.

zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo zoo wrong

(chosen for being easy to remember, and funny - the checksum is "wrong")

DashPhrase.ZECRET

The Secret Salt to use for documentation examples, testing & debugging, etc.

TREZOR

DashPhrase.ZEED

The Seed to use for documentation examples, testing & debugging, etc.

ac27495480225222079d7be181583751e86f571027b0497b5b5d11218e0a8a13332572917f0f8e5a589620c6f15b11c61dee327651a14c34e18231052e48c069

Compatibility Testing

• Passes Trezor's python-mnemonic tests

npm run test

LICENSE

Copyright 2023 Dash Incubator
(forked from therootcompany/passphrase.js, re-license as MIT with permission)
Copyright 2021 AJ ONeal (MPL-2.0 License)
Copyright 2021 Root, LLC (MPL-2.0 License)