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HDNode: stop exposing constants

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This commit is contained in:
Daniel Cousens 2015-08-25 20:49:08 +10:00
parent ccfaaf0b6f
commit 4b825bf2a8
2 changed files with 11 additions and 13 deletions
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22
src/hdnode.js
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@ -11,6 +11,9 @@ var ECPair = require('./ecpair')
var ecurve = require('ecurve')
var curve = ecurve.getCurveByName('secp256k1')
var MASTER_SECRET = new Buffer('Bitcoin seed')
var HIGHEST_BIT = 0x80000000
function HDNode (keyPair, chainCode) {
typeforce(types.tuple('ECPair', types.Buffer256bit), arguments)
@ -23,17 +26,13 @@ function HDNode (keyPair, chainCode) {
this.parentFingerprint = 0x00000000
}
HDNode.MASTER_SECRET = new Buffer('Bitcoin seed')
HDNode.HIGHEST_BIT = 0x80000000
HDNode.LENGTH = 78
HDNode.fromSeedBuffer = function (seed, network) {
typeforce(types.tuple(types.Buffer, types.maybe(types.Network)), arguments)
if (seed.length < 16) throw new TypeError('Seed should be at least 128 bits')
if (seed.length > 64) throw new TypeError('Seed should be at most 512 bits')
var I = createHmac('sha512', HDNode.MASTER_SECRET).update(seed).digest()
var I = createHmac('sha512', MASTER_SECRET).update(seed).digest()
var IL = I.slice(0, 32)
var IR = I.slice(32)
@ -53,9 +52,9 @@ HDNode.fromSeedHex = function (hex, network) {
HDNode.fromBase58 = function (string, networks) {
var buffer = base58check.decode(string)
if (buffer.length !== HDNode.LENGTH) throw new Error('Invalid buffer length')
if (buffer.length !== 78) throw new Error('Invalid buffer length')
// 4 byte: version bytes
// 4 bytes: version bytes
var version = buffer.readUInt32BE(0)
var network
@ -75,7 +74,7 @@ HDNode.fromBase58 = function (string, networks) {
version !== network.bip32.public) throw new Error('Invalid network')
// 1 byte: depth: 0x00 for master nodes, 0x01 for level-1 descendants, ...
var depth = buffer.readUInt8(4)
var depth = buffer[4]
// 4 bytes: the fingerprint of the parent's key (0x00000000 if master key)
var parentFingerprint = buffer.readUInt32BE(5)
@ -155,12 +154,11 @@ HDNode.prototype.toBase58 = function (__isPrivate) {
// Version
var network = this.keyPair.network
var version = this.keyPair.d ? network.bip32.private : network.bip32.public
var buffer = new Buffer(HDNode.LENGTH)
var buffer = new Buffer(78)
// 4 bytes: version bytes
buffer.writeUInt32BE(version, 0)
// Depth
// 1 byte: depth: 0x00 for master nodes, 0x01 for level-1 descendants, ....
buffer.writeUInt8(this.depth, 4)
@ -191,7 +189,7 @@ HDNode.prototype.toBase58 = function (__isPrivate) {
// https://github.com/bitcoin/bips/blob/master/bip-0032.mediawiki#child-key-derivation-ckd-functions
HDNode.prototype.derive = function (index) {
var isHardened = index >= HDNode.HIGHEST_BIT
var isHardened = index >= HIGHEST_BIT
var data = new Buffer(37)
// Hardened child
@ -263,7 +261,7 @@ HDNode.prototype.derive = function (index) {
HDNode.prototype.deriveHardened = function (index) {
// Only derives hardened private keys by default
return this.derive(index + HDNode.HIGHEST_BIT)
return this.derive(index + HIGHEST_BIT)
}
HDNode.prototype.toString = HDNode.prototype.toBase58

2
test/hdnode.js
View file

@ -193,7 +193,7 @@ describe('HDNode', function () {
assert.strictEqual(hd.depth, depth || 0)
if (v.hardened) {
assert.strictEqual(hd.index, v.m + HDNode.HIGHEST_BIT)
assert.strictEqual(hd.index, v.m + 0x80000000)
} else {
assert.strictEqual(hd.index, v.m)
}