commit
17041553df
4 changed files with 107 additions and 38 deletions
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@ -291,6 +291,30 @@ HDNode.prototype.isNeutered = function () {
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return !(this.keyPair.d)
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}
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HDNode.prototype.derivePath = function (path) {
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typeforce(types.Bip32Path, path)
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var splitPath = path.split('/')
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if (splitPath[0] === 'm') {
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if (this.parentFingerprint) {
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throw new Error('Not a master node')
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}
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splitPath = splitPath.slice(1)
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}
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return splitPath.reduce(function (prevHd, indexStr) {
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var index
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if (indexStr.slice(-1) === "'") {
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index = parseInt(indexStr.slice(0, -1), 10)
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return prevHd.deriveHardened(index)
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} else {
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index = parseInt(indexStr, 10)
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return prevHd.derive(index)
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}
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}, this)
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}
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HDNode.prototype.toString = HDNode.prototype.toBase58
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module.exports = HDNode
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@ -26,6 +26,11 @@ function UInt53 (value) {
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Math.floor(value) === value
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}
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function Bip32Path (value) {
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return typeforce.String(value) &&
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value.match(/^(m\/)?(\d+'?\/)*\d+'?$/)
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}
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// external dependent types
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var BigInt = typeforce.quacksLike('BigInteger')
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var ECPoint = typeforce.quacksLike('Point')
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@ -57,7 +62,8 @@ var types = {
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UInt8: UInt8,
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UInt31: UInt31,
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UInt32: UInt32,
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UInt53: UInt53
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UInt53: UInt53,
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Bip32Path: Bip32Path
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}
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for (var typeName in typeforce) {
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25
test/fixtures/hdnode.json
vendored
25
test/fixtures/hdnode.json
vendored
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@ -109,7 +109,7 @@
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"address": "19EuDJdgfRkwCmRzbzVBHZWQG9QNWhftbZ"
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},
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{
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"description": "m/0/2147483647",
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"description": "m/0/2147483647'",
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"m": 2147483647,
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"hardened": true,
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"wif": "L1m5VpbXmMp57P3knskwhoMTLdhAAaXiHvnGLMribbfwzVRpz2Sr",
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@ -134,7 +134,7 @@
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"address": "1BxrAr2pHpeBheusmd6fHDP2tSLAUa3qsW"
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},
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{
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"description": "m/0/2147483647'/1/2147483646",
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"description": "m/0/2147483647'/1/2147483646'",
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"m": 2147483646,
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"hardened": true,
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"wif": "L5KhaMvPYRW1ZoFmRjUtxxPypQ94m6BcDrPhqArhggdaTbbAFJEF",
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@ -232,6 +232,27 @@
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"exception": "Point is not on the curve",
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"hex": "0488b21e000000000000000000873dff81c02f525623fd1fe5167eac3a55a049de3d314bb42ee227ffed37d508020045400697100007000037899988826500030092003000016366806305909050"
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}
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],
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"deriveHardened": [
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2147483648,
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null,
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"foo",
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-1
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],
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"derive": [
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4294967296,
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null,
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"foo",
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-1
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],
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"derivePath": [
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2,
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[2, 3, 4],
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"/",
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"m/m/123",
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"a/0/1/2",
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"m/0/ 1 /2",
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"m/0/1.5/2"
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]
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}
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}
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@ -272,6 +272,7 @@ describe('HDNode', function () {
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fixtures.valid.forEach(function (f) {
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var network = NETWORKS[f.network]
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var hd = HDNode.fromSeedHex(f.master.seed, network)
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var master = hd
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// FIXME: test data is only testing Private -> private for now
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f.children.forEach(function (c, i) {
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@ -285,6 +286,42 @@ describe('HDNode', function () {
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verifyVector(hd, c, i + 1)
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})
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})
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// testing deriving path from master
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f.children.forEach(function (c) {
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it(c.description + ' from ' + f.master.fingerprint + ' by path', function () {
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var path = c.description
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var child = master.derivePath(path)
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var pathSplit = path.split('/').slice(1)
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var pathNotM = pathSplit.join('/')
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var childNotM = master.derivePath(pathNotM)
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verifyVector(child, c, pathSplit.length)
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verifyVector(childNotM, c, pathSplit.length)
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})
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})
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// testing deriving path from children
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f.children.forEach(function (c, i) {
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var cn = master.derivePath(c.description)
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f.children.slice(i + 1).forEach(function (cc) {
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it(cc.description + ' from ' + c.fingerprint + ' by path', function () {
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var path = cc.description
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var pathSplit = path.split('/').slice(i + 2)
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var pathEnd = pathSplit.join('/')
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var pathEndM = 'm/' + pathEnd
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var child = cn.derivePath(pathEnd)
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verifyVector(child, cc, pathSplit.length + i + 1)
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assert.throws(function () {
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cn.derivePath(pathEndM)
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}, /Not a master node/)
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})
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})
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})
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})
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it('works for Private -> public (neutered)', function () {
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@ -328,46 +365,27 @@ describe('HDNode', function () {
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}, /Could not derive hardened child key/)
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})
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it('throws on negative indexes', function () {
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it('throws on wrong types', function () {
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var f = fixtures.valid[0]
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var master = HDNode.fromBase58(f.master.base58, NETWORKS_LIST)
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assert.throws(function () {
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master.deriveHardened(-1)
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}, /Expected UInt31/)
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assert.throws(function () {
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master.derive(-1)
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}, /Expected UInt32/)
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})
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fixtures.invalid.derive.forEach(function (fx) {
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assert.throws(function () {
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master.derive(fx)
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}, /Expected UInt32/)
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})
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it('throws on high indexes', function () {
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var f = fixtures.valid[0]
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var master = HDNode.fromBase58(f.master.base58, NETWORKS_LIST)
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fixtures.invalid.deriveHardened.forEach(function (fx) {
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assert.throws(function () {
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master.deriveHardened(fx)
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}, /Expected UInt31/)
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})
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assert.throws(function () {
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master.deriveHardened(0x80000000)
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}, /Expected UInt31/)
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assert.throws(function () {
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master.derive(0x100000000)
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}, /Expected UInt32/)
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})
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it('throws on non-numbers', function () {
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var f = fixtures.valid[0]
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var master = HDNode.fromBase58(f.master.base58, NETWORKS_LIST)
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assert.throws(function () {
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master.deriveHardened()
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}, /Expected UInt31/)
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assert.throws(function () {
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master.derive()
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}, /Expected UInt32/)
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assert.throws(function () {
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master.deriveHardened('foo')
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}, /Expected UInt31/)
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assert.throws(function () {
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master.derive('foo')
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}, /Expected UInt32/)
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fixtures.invalid.derivePath.forEach(function (fx) {
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assert.throws(function () {
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master.derivePath(fx)
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}, /Expected Bip32Path/)
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})
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})
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})
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})
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