tests/integration: add BIP32 serialization and multi-child examples

Author: dcousens

test/integration/bip32.js

@@ -12,36 +12,55 @@ describe('bitcoinjs-lib (BIP32)', function () {
     assert.equal(node.keyPair.toWIF(), 'cQfoY67cetFNunmBUX5wJiw3VNoYx3gG9U9CAofKE6BfiV1fSRw7')
   })
 
-  it('can create a BIP32 wallet external address', function () {
+  it('can export a BIP32 xpriv, then import it', function () {
+    var mnemonic = 'praise you muffin lion enable neck grocery crumble super myself license ghost'
+    var seed = bip39.mnemonicToSeed(mnemonic)
+    var node = bitcoin.HDNode.fromSeedBuffer(seed)
+    var string = node.toBase58()
+    var restored = bitcoin.HDNode.fromBase58(string)
+
+    assert.equal(node.getAddress(), restored.getAddress()) // same public key
+    assert.equal(node.keyPair.toWIF(), restored.keyPair.toWIF()) // same private key
+  })
+
+  it('can export a BIP32 xpub', function () {
+    var mnemonic = 'praise you muffin lion enable neck grocery crumble super myself license ghost'
+    var seed = bip39.mnemonicToSeed(mnemonic)
+    var node = bitcoin.HDNode.fromSeedBuffer(seed)
+    var string = node.neutered().toBase58()
+
+    assert.equal(string, 'xpub661MyMwAqRbcGhVeaVfEBA25e3cP9DsJQZoE8iep5fZSxy3TnPBNBgWnMZx56oreNc48ZoTkQfatNJ9VWnQ7ZcLZcVStpaXLTeG8bGrzX3n')
+  })
+
+  it('can create a BIP32, bitcoin, account 0, external address', function () {
     var path = "m/0'/0/0"
     var root = bitcoin.HDNode.fromSeedHex('dddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd')
 
     var child1 = root.derivePath(path)
 
     // option 2, manually
-    var child2 = root.deriveHardened(0)
+    var child1b = root.deriveHardened(0)
       .derive(0)
       .derive(0)
 
     assert.equal(child1.getAddress(), '1JHyB1oPXufr4FXkfitsjgNB5yRY9jAaa7')
-    assert.equal(child2.getAddress(), '1JHyB1oPXufr4FXkfitsjgNB5yRY9jAaa7')
+    assert.equal(child1b.getAddress(), '1JHyB1oPXufr4FXkfitsjgNB5yRY9jAaa7')
   })
 
   it('can create a BIP44, bitcoin, account 0, external address', function () {
-    var path = "m/44'/0'/0'/0/0"
     var root = bitcoin.HDNode.fromSeedHex('dddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd')
 
-    var child1 = root.derivePath(path)
+    var child1 = root.derivePath("m/44'/0'/0'/0/0")
 
     // option 2, manually
-    var child2 = root.deriveHardened(44)
+    var child1b = root.deriveHardened(44)
       .deriveHardened(0)
       .deriveHardened(0)
       .derive(0)
       .derive(0)
 
     assert.equal(child1.getAddress(), '12Tyvr1U8A3ped6zwMEU5M8cx3G38sP5Au')
-    assert.equal(child2.getAddress(), '12Tyvr1U8A3ped6zwMEU5M8cx3G38sP5Au')
+    assert.equal(child1b.getAddress(), '12Tyvr1U8A3ped6zwMEU5M8cx3G38sP5Au')
   })
 
   it('can create a BIP49, bitcoin testnet, account 0, external address', function () {
@@ -61,18 +80,20 @@ describe('bitcoinjs-lib (BIP32)', function () {
     assert.equal(address, '2Mww8dCYPUpKHofjgcXcBCEGmniw9CoaiD2')
   })
 
-  it('can use BIP39 to generate BIP32 wallet address', function () {
+  it('can use BIP39 to generate BIP32 addresses', function () {
 //     var mnemonic = bip39.generateMnemonic()
     var mnemonic = 'praise you muffin lion enable neck grocery crumble super myself license ghost'
     assert(bip39.validateMnemonic(mnemonic))
 
     var seed = bip39.mnemonicToSeed(mnemonic)
     var root = bitcoin.HDNode.fromSeedBuffer(seed)
 
-    // 1st receive address
+    // receive addresses
     assert.strictEqual(root.derivePath("m/0'/0/0").getAddress(), '1AVQHbGuES57wD68AJi7Gcobc3RZrfYWTC')
+    assert.strictEqual(root.derivePath("m/0'/0/1").getAddress(), '1Ad6nsmqDzbQo5a822C9bkvAfrYv9mc1JL')
 
-    // 1st change address
+    // change addresses
     assert.strictEqual(root.derivePath("m/0'/1/0").getAddress(), '1349KVc5NgedaK7DvuD4xDFxL86QN1Hvdn')
+    assert.strictEqual(root.derivePath("m/0'/1/1").getAddress(), '1EAvj4edpsWcSer3duybAd4KiR4bCJW5J6')
   })
 })