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optimize public key generation for BIP32 with cache

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This commit is contained in:
Manuel Araoz 2014-04-17 18:06:55 -03:00
commit 3e8ca41a0a
2 changed files with 64 additions and 37 deletions
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47
js/models/core/PublicKeyRing.js
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@ -25,10 +25,12 @@ function PublicKeyRing(opts) {
this.requiredCopayers = opts.requiredCopayers || 3;
this.totalCopayers = opts.totalCopayers || 5;
this.copayersBIP32 = [];
this.copayersBIP32 = opts.copayersBIP32 || [];
this.changeAddressIndex=0;
this.addressIndex=0;
this.changeAddressIndex= opts.changeAddressIndex || 0;
this.addressIndex= opts.addressIndex || 0;
this.publicKeysCache = opts.publicKeysCache || {};
}
/*
@ -45,24 +47,13 @@ PublicKeyRing.Branch = function (index, isChange) {
};
PublicKeyRing.fromObj = function (data) {
if (!data.ts) {
if (data instanceof PublicKeyRing) {
throw new Error('bad data format: Did you use .toObj()?');
}
var config = { networkName: data.networkName || 'livenet' };
var w = new PublicKeyRing(config);
w.walletId = data.walletId;
w.requiredCopayers = data.requiredCopayers;
w.totalCopayers = data.totalCopayers;
w.addressIndex = data.addressIndex;
w.changeAddressIndex = data.changeAddressIndex;
w.copayersBIP32 = data.copayersExtPubKeys.map( function (pk) {
data.copayersBIP32 = data.copayersExtPubKeys.map(function(pk) {
return new BIP32(pk);
});
w.ts = data.ts;
return w;
return new PublicKeyRing(data);
};
PublicKeyRing.prototype.toObj = function() {
@ -77,7 +68,7 @@ PublicKeyRing.prototype.toObj = function() {
copayersExtPubKeys: this.copayersBIP32.map( function (b) {
return b.extendedPublicKeyString();
}),
ts: parseInt(Date.now() / 1000),
publicKeysCache: this.publicKeysCache
};
};
@ -91,7 +82,6 @@ PublicKeyRing.prototype.registeredCopayers = function () {
};
PublicKeyRing.prototype.isComplete = function () {
return this.registeredCopayers() >= this.totalCopayers;
};
@ -130,12 +120,19 @@ PublicKeyRing.prototype.addCopayer = function (newEpk) {
PublicKeyRing.prototype.getPubKeys = function (index, isChange) {
this._checkKeys();
var pubKeys = [];
var l = this.copayersBIP32.length;
for(var i=0; i<l; i++) {
var path = PublicKeyRing.Branch(index, isChange);
var bip32 = this.copayersBIP32[i].derive(path);
pubKeys[i] = bip32.eckey.public;
var path = PublicKeyRing.Branch(index, isChange);
var pubKeys = this.publicKeysCache[path];
if (!pubKeys) {
pubKeys = [];
var l = this.copayersBIP32.length;
for(var i=0; i<l; i++) {
var bip32 = this.copayersBIP32[i].derive(path);
pubKeys[i] = bip32.eckey.public;
}
this.publicKeysCache[path] = pubKeys;
//console.log('cache fill['+path+']='+pubKeys.length);
} else {
//console.log('cache hit!');
}
return pubKeys;