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61 lines
2.3 KiB
61 lines
2.3 KiB
// Copyright (c) 2014-2017, 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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var key_images = {}
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//
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var Lazy_KeyImage = function(
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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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{
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var cache_index = tx_pub_key + ':' + public_address + ':' + out_index
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const cached__key_image = key_images[cache_index]
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if (typeof cached__key_image !== 'undefined' && cached__key_image !== null) {
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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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key_images[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 |