HenryNguyen5
6 years ago
committed by
GitHub
parent
cba9d3e439
commit
8144743eda
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// Copyright (c) 2014-2018, MyMonero.com
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification, are
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// permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice, this list of
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// conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list
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// of conditions and the following disclaimer in the documentation and/or other
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// materials provided with the distribution.
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//
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// 3. Neither the name of the copyright holder nor the names of its contributors may be
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// used to endorse or promote products derived from this software without specific
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// prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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const monero_utils = require("./monero_cryptonote_utils_instance");
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// Managed caches - Can be used by apps which can't send a mutable_keyImagesByCacheKey
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type KeyImageCache = { [cacheIndex: string]: string };
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type KeyImageCacheMap = { [address: string]: KeyImageCache };
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const keyImagesByWalletId: KeyImageCacheMap = {};
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/**
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* @description Performs a memoized computation of a key image
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* @param {KeyImageCache} keyImageCache
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* @param {string} txPubKey
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* @param {number} outIndex
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* @param {string} address
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* @param {string} privViewKey
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* @param {string} pubSpendKey
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* @param {string} privSpendKey
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* @returns
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*/
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export function keyImage(
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keyImageCache: KeyImageCache,
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txPubKey: string,
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outIndex: number,
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address: string,
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privViewKey: string,
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pubSpendKey: string,
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privSpendKey: string,
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) {
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const cacheIndex = `${txPubKey}:${address}:${outIndex}`;
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const cachedKeyImage = keyImageCache[cacheIndex];
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if (cachedKeyImage) {
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return cachedKeyImage;
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}
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const { key_image } = monero_utils.generate_key_image(
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txPubKey,
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privViewKey,
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pubSpendKey,
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privSpendKey,
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outIndex,
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);
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// cache the computed key image
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keyImageCache[cacheIndex] = key_image;
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return key_image;
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}
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/**
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*
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* @description Get a key image cache, that's mapped by address
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* @export
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* @param {string} address
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*/
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export function getKeyImageCache(address: string) {
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const cacheId = parseAddress(address);
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let cache = keyImagesByWalletId[cacheId];
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if (!cache) {
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cache = {};
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keyImagesByWalletId[cacheId] = cache;
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}
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return cache;
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}
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/**
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* @description Clears a key image cache that's mapped by the users address
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*
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*
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* IMPORTANT: Ensure you call this method when you want to clear your wallet from
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* memory or delete it, or else you could leak key images and public addresses.
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* @export
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* @param {string} address
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*/
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export function clearKeyImageCache(address: string) {
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const cacheId = parseAddress(address);
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delete keyImagesByWalletId[cacheId];
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const cache = keyImagesByWalletId[cacheId];
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if (cache) {
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throw "Key image cache still exists after deletion";
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}
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}
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/**
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* @description Normalize an address before using it to access the key image cache map as a key
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* @param {string} address
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*/
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function parseAddress(address: string) {
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// NOTE: making the assumption that public_address is unique enough to identify a wallet for caching....
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// FIXME: with subaddresses, is that still the case? would we need to split them up by subaddr anyway?
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if (!address) {
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throw "Address does not exist";
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}
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return address.toString();
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}
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@ -1,101 +0,0 @@
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// Copyright (c) 2014-2018, MyMonero.com
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//
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without modification, are
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// permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice, this list of
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// conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list
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// of conditions and the following disclaimer in the documentation and/or other
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// materials provided with the distribution.
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//
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// 3. Neither the name of the copyright holder nor the names of its contributors may be
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// used to endorse or promote products derived from this software without specific
|
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// prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
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// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
|
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
|
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// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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"use strict";
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//
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const monero_utils = require("./monero_cryptonote_utils_instance");
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//
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const Lazy_KeyImage = function(
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mutable_keyImagesByCacheKey, // pass a mutable JS dictionary
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tx_pub_key,
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out_index,
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public_address,
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view_key__private,
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spend_key__public,
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spend_key__private,
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) {
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var cache_index = tx_pub_key + ":" + public_address + ":" + out_index;
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const cached__key_image = mutable_keyImagesByCacheKey[cache_index];
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if (
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typeof cached__key_image !== "undefined" &&
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cached__key_image !== null
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) {
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return cached__key_image;
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}
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var key_image = monero_utils.generate_key_image(
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tx_pub_key,
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view_key__private,
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spend_key__public,
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spend_key__private,
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out_index,
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).key_image;
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// cache:
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mutable_keyImagesByCacheKey[cache_index] = key_image;
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//
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return key_image;
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};
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exports.Lazy_KeyImage = Lazy_KeyImage;
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//
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//
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// Managed caches - Can be used by apps which can't send a mutable_keyImagesByCacheKey
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const __global_managed_keyImageCaches_by_walletId = {};
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function _managedKeyImageCacheWalletIdForWalletWith(public_address) {
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// NOTE: making the assumption that public_address is unique enough to identify a wallet for caching....
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// FIXME: with subaddresses, is that still the case? would we need to split them up by subaddr anyway?
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if (
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public_address == "" ||
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!public_address ||
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typeof public_address == "undefined"
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) {
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throw "managedKeyImageCacheIdentifierForWalletWith: Illegal public_address";
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}
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return "" + public_address;
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}
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const Lazy_KeyImageCacheForWalletWith = function(public_address) {
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var cacheId = _managedKeyImageCacheWalletIdForWalletWith(public_address);
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var cache = __global_managed_keyImageCaches_by_walletId[cacheId];
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if (typeof cache === "undefined" || !cache) {
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cache = {};
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__global_managed_keyImageCaches_by_walletId[cacheId] = cache;
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}
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return cache;
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};
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exports.Lazy_KeyImageCacheForWalletWith = Lazy_KeyImageCacheForWalletWith;
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//
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const DeleteManagedKeyImagesForWalletWith = function(public_address) {
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// IMPORTANT: Ensure you call this method when you want to clear your wallet from
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// memory or delete it, or else you could leak key images and public addresses.
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const cacheId = _managedKeyImageCacheWalletIdForWalletWith(public_address);
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delete __global_managed_keyImageCaches_by_walletId[cacheId];
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//
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const cache = __global_managed_keyImageCaches_by_walletId[cacheId];
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if (typeof cache !== "undefined") {
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throw "Key image cache still exists after deletion";
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}
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};
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exports.DeleteManagedKeyImagesForWalletWith = DeleteManagedKeyImagesForWalletWith;
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