331 lines
13 KiB
JavaScript
331 lines
13 KiB
JavaScript
"use strict";
|
|
import { Base58 } from "@ethersproject/basex";
|
|
import { arrayify, concat, hexDataSlice, hexZeroPad, hexlify } from "@ethersproject/bytes";
|
|
import { BigNumber } from "@ethersproject/bignumber";
|
|
import { toUtf8Bytes, UnicodeNormalizationForm } from "@ethersproject/strings";
|
|
import { pbkdf2 } from "@ethersproject/pbkdf2";
|
|
import { defineReadOnly } from "@ethersproject/properties";
|
|
import { SigningKey } from "@ethersproject/signing-key";
|
|
import { computeHmac, ripemd160, sha256, SupportedAlgorithm } from "@ethersproject/sha2";
|
|
import { computeAddress } from "@ethersproject/transactions";
|
|
import { wordlists } from "@ethersproject/wordlists";
|
|
import { Logger } from "@ethersproject/logger";
|
|
import { version } from "./_version";
|
|
const logger = new Logger(version);
|
|
const N = BigNumber.from("0xfffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd0364141");
|
|
// "Bitcoin seed"
|
|
const MasterSecret = toUtf8Bytes("Bitcoin seed");
|
|
const HardenedBit = 0x80000000;
|
|
// Returns a byte with the MSB bits set
|
|
function getUpperMask(bits) {
|
|
return ((1 << bits) - 1) << (8 - bits);
|
|
}
|
|
// Returns a byte with the LSB bits set
|
|
function getLowerMask(bits) {
|
|
return (1 << bits) - 1;
|
|
}
|
|
function bytes32(value) {
|
|
return hexZeroPad(hexlify(value), 32);
|
|
}
|
|
function base58check(data) {
|
|
return Base58.encode(concat([data, hexDataSlice(sha256(sha256(data)), 0, 4)]));
|
|
}
|
|
function getWordlist(wordlist) {
|
|
if (wordlist == null) {
|
|
return wordlists["en"];
|
|
}
|
|
if (typeof (wordlist) === "string") {
|
|
const words = wordlists[wordlist];
|
|
if (words == null) {
|
|
logger.throwArgumentError("unknown locale", "wordlist", wordlist);
|
|
}
|
|
return words;
|
|
}
|
|
return wordlist;
|
|
}
|
|
const _constructorGuard = {};
|
|
export const defaultPath = "m/44'/60'/0'/0/0";
|
|
;
|
|
export class HDNode {
|
|
/**
|
|
* This constructor should not be called directly.
|
|
*
|
|
* Please use:
|
|
* - fromMnemonic
|
|
* - fromSeed
|
|
*/
|
|
constructor(constructorGuard, privateKey, publicKey, parentFingerprint, chainCode, index, depth, mnemonicOrPath) {
|
|
logger.checkNew(new.target, HDNode);
|
|
/* istanbul ignore if */
|
|
if (constructorGuard !== _constructorGuard) {
|
|
throw new Error("HDNode constructor cannot be called directly");
|
|
}
|
|
if (privateKey) {
|
|
const signingKey = new SigningKey(privateKey);
|
|
defineReadOnly(this, "privateKey", signingKey.privateKey);
|
|
defineReadOnly(this, "publicKey", signingKey.compressedPublicKey);
|
|
}
|
|
else {
|
|
defineReadOnly(this, "privateKey", null);
|
|
defineReadOnly(this, "publicKey", hexlify(publicKey));
|
|
}
|
|
defineReadOnly(this, "parentFingerprint", parentFingerprint);
|
|
defineReadOnly(this, "fingerprint", hexDataSlice(ripemd160(sha256(this.publicKey)), 0, 4));
|
|
defineReadOnly(this, "address", computeAddress(this.publicKey));
|
|
defineReadOnly(this, "chainCode", chainCode);
|
|
defineReadOnly(this, "index", index);
|
|
defineReadOnly(this, "depth", depth);
|
|
if (mnemonicOrPath == null) {
|
|
// From a source that does not preserve the path (e.g. extended keys)
|
|
defineReadOnly(this, "mnemonic", null);
|
|
defineReadOnly(this, "path", null);
|
|
}
|
|
else if (typeof (mnemonicOrPath) === "string") {
|
|
// From a source that does not preserve the mnemonic (e.g. neutered)
|
|
defineReadOnly(this, "mnemonic", null);
|
|
defineReadOnly(this, "path", mnemonicOrPath);
|
|
}
|
|
else {
|
|
// From a fully qualified source
|
|
defineReadOnly(this, "mnemonic", mnemonicOrPath);
|
|
defineReadOnly(this, "path", mnemonicOrPath.path);
|
|
}
|
|
}
|
|
get extendedKey() {
|
|
// We only support the mainnet values for now, but if anyone needs
|
|
// testnet values, let me know. I believe current sentiment is that
|
|
// we should always use mainnet, and use BIP-44 to derive the network
|
|
// - Mainnet: public=0x0488B21E, private=0x0488ADE4
|
|
// - Testnet: public=0x043587CF, private=0x04358394
|
|
if (this.depth >= 256) {
|
|
throw new Error("Depth too large!");
|
|
}
|
|
return base58check(concat([
|
|
((this.privateKey != null) ? "0x0488ADE4" : "0x0488B21E"),
|
|
hexlify(this.depth),
|
|
this.parentFingerprint,
|
|
hexZeroPad(hexlify(this.index), 4),
|
|
this.chainCode,
|
|
((this.privateKey != null) ? concat(["0x00", this.privateKey]) : this.publicKey),
|
|
]));
|
|
}
|
|
neuter() {
|
|
return new HDNode(_constructorGuard, null, this.publicKey, this.parentFingerprint, this.chainCode, this.index, this.depth, this.path);
|
|
}
|
|
_derive(index) {
|
|
if (index > 0xffffffff) {
|
|
throw new Error("invalid index - " + String(index));
|
|
}
|
|
// Base path
|
|
let path = this.path;
|
|
if (path) {
|
|
path += "/" + (index & ~HardenedBit);
|
|
}
|
|
const data = new Uint8Array(37);
|
|
if (index & HardenedBit) {
|
|
if (!this.privateKey) {
|
|
throw new Error("cannot derive child of neutered node");
|
|
}
|
|
// Data = 0x00 || ser_256(k_par)
|
|
data.set(arrayify(this.privateKey), 1);
|
|
// Hardened path
|
|
if (path) {
|
|
path += "'";
|
|
}
|
|
}
|
|
else {
|
|
// Data = ser_p(point(k_par))
|
|
data.set(arrayify(this.publicKey));
|
|
}
|
|
// Data += ser_32(i)
|
|
for (let i = 24; i >= 0; i -= 8) {
|
|
data[33 + (i >> 3)] = ((index >> (24 - i)) & 0xff);
|
|
}
|
|
const I = arrayify(computeHmac(SupportedAlgorithm.sha512, this.chainCode, data));
|
|
const IL = I.slice(0, 32);
|
|
const IR = I.slice(32);
|
|
// The private key
|
|
let ki = null;
|
|
// The public key
|
|
let Ki = null;
|
|
if (this.privateKey) {
|
|
ki = bytes32(BigNumber.from(IL).add(this.privateKey).mod(N));
|
|
}
|
|
else {
|
|
const ek = new SigningKey(hexlify(IL));
|
|
Ki = ek._addPoint(this.publicKey);
|
|
}
|
|
let mnemonicOrPath = path;
|
|
const srcMnemonic = this.mnemonic;
|
|
if (srcMnemonic) {
|
|
mnemonicOrPath = Object.freeze({
|
|
phrase: srcMnemonic.phrase,
|
|
path: path,
|
|
locale: (srcMnemonic.locale || "en")
|
|
});
|
|
}
|
|
return new HDNode(_constructorGuard, ki, Ki, this.fingerprint, bytes32(IR), index, this.depth + 1, mnemonicOrPath);
|
|
}
|
|
derivePath(path) {
|
|
const components = path.split("/");
|
|
if (components.length === 0 || (components[0] === "m" && this.depth !== 0)) {
|
|
throw new Error("invalid path - " + path);
|
|
}
|
|
if (components[0] === "m") {
|
|
components.shift();
|
|
}
|
|
let result = this;
|
|
for (let i = 0; i < components.length; i++) {
|
|
const component = components[i];
|
|
if (component.match(/^[0-9]+'$/)) {
|
|
const index = parseInt(component.substring(0, component.length - 1));
|
|
if (index >= HardenedBit) {
|
|
throw new Error("invalid path index - " + component);
|
|
}
|
|
result = result._derive(HardenedBit + index);
|
|
}
|
|
else if (component.match(/^[0-9]+$/)) {
|
|
const index = parseInt(component);
|
|
if (index >= HardenedBit) {
|
|
throw new Error("invalid path index - " + component);
|
|
}
|
|
result = result._derive(index);
|
|
}
|
|
else {
|
|
throw new Error("invalid path component - " + component);
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
static _fromSeed(seed, mnemonic) {
|
|
const seedArray = arrayify(seed);
|
|
if (seedArray.length < 16 || seedArray.length > 64) {
|
|
throw new Error("invalid seed");
|
|
}
|
|
const I = arrayify(computeHmac(SupportedAlgorithm.sha512, MasterSecret, seedArray));
|
|
return new HDNode(_constructorGuard, bytes32(I.slice(0, 32)), null, "0x00000000", bytes32(I.slice(32)), 0, 0, mnemonic);
|
|
}
|
|
static fromMnemonic(mnemonic, password, wordlist) {
|
|
// If a locale name was passed in, find the associated wordlist
|
|
wordlist = getWordlist(wordlist);
|
|
// Normalize the case and spacing in the mnemonic (throws if the mnemonic is invalid)
|
|
mnemonic = entropyToMnemonic(mnemonicToEntropy(mnemonic, wordlist), wordlist);
|
|
return HDNode._fromSeed(mnemonicToSeed(mnemonic, password), {
|
|
phrase: mnemonic,
|
|
path: "m",
|
|
locale: wordlist.locale
|
|
});
|
|
}
|
|
static fromSeed(seed) {
|
|
return HDNode._fromSeed(seed, null);
|
|
}
|
|
static fromExtendedKey(extendedKey) {
|
|
const bytes = Base58.decode(extendedKey);
|
|
if (bytes.length !== 82 || base58check(bytes.slice(0, 78)) !== extendedKey) {
|
|
logger.throwArgumentError("invalid extended key", "extendedKey", "[REDACTED]");
|
|
}
|
|
const depth = bytes[4];
|
|
const parentFingerprint = hexlify(bytes.slice(5, 9));
|
|
const index = parseInt(hexlify(bytes.slice(9, 13)).substring(2), 16);
|
|
const chainCode = hexlify(bytes.slice(13, 45));
|
|
const key = bytes.slice(45, 78);
|
|
switch (hexlify(bytes.slice(0, 4))) {
|
|
// Public Key
|
|
case "0x0488b21e":
|
|
case "0x043587cf":
|
|
return new HDNode(_constructorGuard, null, hexlify(key), parentFingerprint, chainCode, index, depth, null);
|
|
// Private Key
|
|
case "0x0488ade4":
|
|
case "0x04358394 ":
|
|
if (key[0] !== 0) {
|
|
break;
|
|
}
|
|
return new HDNode(_constructorGuard, hexlify(key.slice(1)), null, parentFingerprint, chainCode, index, depth, null);
|
|
}
|
|
return logger.throwArgumentError("invalid extended key", "extendedKey", "[REDACTED]");
|
|
}
|
|
}
|
|
export function mnemonicToSeed(mnemonic, password) {
|
|
if (!password) {
|
|
password = "";
|
|
}
|
|
const salt = toUtf8Bytes("mnemonic" + password, UnicodeNormalizationForm.NFKD);
|
|
return pbkdf2(toUtf8Bytes(mnemonic, UnicodeNormalizationForm.NFKD), salt, 2048, 64, "sha512");
|
|
}
|
|
export function mnemonicToEntropy(mnemonic, wordlist) {
|
|
wordlist = getWordlist(wordlist);
|
|
logger.checkNormalize();
|
|
const words = wordlist.split(mnemonic);
|
|
if ((words.length % 3) !== 0) {
|
|
throw new Error("invalid mnemonic");
|
|
}
|
|
const entropy = arrayify(new Uint8Array(Math.ceil(11 * words.length / 8)));
|
|
let offset = 0;
|
|
for (let i = 0; i < words.length; i++) {
|
|
let index = wordlist.getWordIndex(words[i].normalize("NFKD"));
|
|
if (index === -1) {
|
|
throw new Error("invalid mnemonic");
|
|
}
|
|
for (let bit = 0; bit < 11; bit++) {
|
|
if (index & (1 << (10 - bit))) {
|
|
entropy[offset >> 3] |= (1 << (7 - (offset % 8)));
|
|
}
|
|
offset++;
|
|
}
|
|
}
|
|
const entropyBits = 32 * words.length / 3;
|
|
const checksumBits = words.length / 3;
|
|
const checksumMask = getUpperMask(checksumBits);
|
|
const checksum = arrayify(sha256(entropy.slice(0, entropyBits / 8)))[0] & checksumMask;
|
|
if (checksum !== (entropy[entropy.length - 1] & checksumMask)) {
|
|
throw new Error("invalid checksum");
|
|
}
|
|
return hexlify(entropy.slice(0, entropyBits / 8));
|
|
}
|
|
export function entropyToMnemonic(entropy, wordlist) {
|
|
wordlist = getWordlist(wordlist);
|
|
entropy = arrayify(entropy);
|
|
if ((entropy.length % 4) !== 0 || entropy.length < 16 || entropy.length > 32) {
|
|
throw new Error("invalid entropy");
|
|
}
|
|
const indices = [0];
|
|
let remainingBits = 11;
|
|
for (let i = 0; i < entropy.length; i++) {
|
|
// Consume the whole byte (with still more to go)
|
|
if (remainingBits > 8) {
|
|
indices[indices.length - 1] <<= 8;
|
|
indices[indices.length - 1] |= entropy[i];
|
|
remainingBits -= 8;
|
|
// This byte will complete an 11-bit index
|
|
}
|
|
else {
|
|
indices[indices.length - 1] <<= remainingBits;
|
|
indices[indices.length - 1] |= entropy[i] >> (8 - remainingBits);
|
|
// Start the next word
|
|
indices.push(entropy[i] & getLowerMask(8 - remainingBits));
|
|
remainingBits += 3;
|
|
}
|
|
}
|
|
// Compute the checksum bits
|
|
const checksumBits = entropy.length / 4;
|
|
const checksum = arrayify(sha256(entropy))[0] & getUpperMask(checksumBits);
|
|
// Shift the checksum into the word indices
|
|
indices[indices.length - 1] <<= checksumBits;
|
|
indices[indices.length - 1] |= (checksum >> (8 - checksumBits));
|
|
return wordlist.join(indices.map((index) => wordlist.getWord(index)));
|
|
}
|
|
export function isValidMnemonic(mnemonic, wordlist) {
|
|
try {
|
|
mnemonicToEntropy(mnemonic, wordlist);
|
|
return true;
|
|
}
|
|
catch (error) { }
|
|
return false;
|
|
}
|
|
export function getAccountPath(index) {
|
|
if (typeof (index) !== "number" || index < 0 || index >= HardenedBit || index % 1) {
|
|
logger.throwArgumentError("invalid account index", "index", index);
|
|
}
|
|
return `m/44'/60'/${index}'/0/0`;
|
|
}
|
|
//# sourceMappingURL=index.js.map
|