BIP32 PrivateKey wrapper

js/models/PrivateKey.js

@@ -0,0 +1,35 @@
+'use strict';
+
+
+var imports     = require('soop').imports();
+var bitcore     = require('bitcore');
+var BIP32       = bitcore.BIP32;
+var WalletKey   = bitcore.WalletKey;
+var networks    = bitcore.networks;
+var PublicKeyRing  = require('./PublicKeyRing');
+
+function PrivateKey(opts) {
+  this.id    = opts.id;
+  this.network = opts.networkName === 'testnet' ? 
+    networks.testnet : networks.livenet;
+  this.BIP32 = opts.BIP32 || new BIP32(this.network.name);
+};
+
+
+PrivateKey.prototype.getBIP32 = function(index,isChange) {
+  if (typeof index === 'undefined') {
+    return this.BIP32;
+  }
+  return this.BIP32.derive( isChange ? 
+    PublicKeyRing.ChangeBranch(index):PublicKeyRing.PublicBranch(index) );
+};
+
+PrivateKey.prototype.get = function(index,isChange) {
+  var derivedBIP32 =  this.getBIP32(index,isChange);
+  var wk = new WalletKey({network: this.network});
+  var p = derivedBIP32.eckey.private.toString('hex');
+  wk.fromObj({priv: p});
+  return wk;
+};
+
+module.exports = require('soop')(PrivateKey);