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159 lines
7.2 KiB
159 lines
7.2 KiB
// Copyright (c) 2014-2019, 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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const MyMoneroCoreBridgeClass = require('./MyMoneroCoreBridgeClass')
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const MyMoneroBridge_utils = require('./MyMoneroBridge_utils')
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//
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module.exports = function(options)
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{
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options = options || {}
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MyMoneroBridge_utils.update_options_for_fallback_to_asmjs(options)
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const platform_info = MyMoneroBridge_utils.detect_platform();
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const ENVIRONMENT_IS_WEB = platform_info.ENVIRONMENT_IS_WEB;
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const ENVIRONMENT_IS_WORKER = platform_info.ENVIRONMENT_IS_WORKER;
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const ENVIRONMENT_IS_NODE = platform_info.ENVIRONMENT_IS_NODE;
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const ENVIRONMENT_IS_SHELL = platform_info.ENVIRONMENT_IS_SHELL;
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//
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function locateFile(filename, scriptDirectory)
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{
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// if (options["locateFile"]) {
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// return options["locateFile"](filename, scriptDirectory)
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// }
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var this_scriptDirectory = scriptDirectory
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const lastChar = this_scriptDirectory.charAt(this_scriptDirectory.length - 1)
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if (lastChar == "/" || lastChar == "\\") {
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// ^-- this is not a '\\' on Windows because emscripten actually appends a '/'
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this_scriptDirectory = this_scriptDirectory.substring(0, this_scriptDirectory.length - 1) // remove trailing "/"
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}
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var fullPath = null; // add trailing slash to this
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if (ENVIRONMENT_IS_NODE) {
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const path = require('path')
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const lastPathComponent = path.basename(this_scriptDirectory)
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if (lastPathComponent == "monero_utils") { // typical node or electron-main process
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fullPath = path.format({
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dir: this_scriptDirectory,
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base: filename
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})
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} else {
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console.warn(`MyMoneroCoreBridge/locateFile() on node.js didn't find "monero_utils" (or possibly MyMoneroCoreBridge.js) itself in the expected location in the following path. The function may need to be expanded but it might in normal situations be likely to be another bug. ${pathTo_cryptonoteUtilsDir}`)
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}
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} else if (ENVIRONMENT_IS_WEB) {
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var pathTo_cryptonoteUtilsDir;
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if (typeof __dirname !== undefined && __dirname !== "/") { // looks like node running in browser.. (but not going to assume it's electron-renderer since that should be taken care of by monero_utils.js itself)
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// but just in case it is... here's an attempt to support it
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// have to check != "/" b/c webpack (I think) replaces __dirname
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pathTo_cryptonoteUtilsDir = "file://" + __dirname + "/" // prepending "file://" because it's going to try to stream it
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} else { // actual web browser
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pathTo_cryptonoteUtilsDir = this_scriptDirectory + `/mymonero_core_js/monero_utils/` // this works for the MyMonero browser build, and is quite general, at least
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}
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fullPath = pathTo_cryptonoteUtilsDir + filename
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}
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if (fullPath == null) {
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throw "Unable to derive fullPath. Please pass locateFile() to bridge obj init."
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}
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//
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return fullPath
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}
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return new Promise(function(resolve, reject) {
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var Module_template = {}
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if (options.asmjs != true || options.wasm == true) { // wasm
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// console.log("Using wasm: ", true)
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//
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Module_template["locateFile"] = locateFile
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//
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// NOTE: This requires src/module-post.js to be included as post-js in CMakeLists.txt under a wasm build
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require(`./MyMoneroCoreCpp_WASM`)(Module_template).ready.then(function(thisModule)
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{
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const instance = new MyMoneroCoreBridgeClass(thisModule);
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resolve(instance);
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}).catch(function(e) {
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console.error("Error loading WASM_MyMoneroCoreCpp:", e);
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reject(e);
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});
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} else { // this is synchronous so we can resolve immediately
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// console.log("Using wasm: ", false)
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//
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var scriptDirectory=""; // this was extracted from emscripten - it could get factored if anything else would ever need it
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if (ENVIRONMENT_IS_NODE) {
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scriptDirectory=__dirname+"/";
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} else if (ENVIRONMENT_IS_WEB || ENVIRONMENT_IS_WORKER) {
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if (ENVIRONMENT_IS_WORKER) {
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scriptDirectory = self.location.href
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} else if (document.currentScript) {
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scriptDirectory = document.currentScript.src
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}
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var _scriptDir = typeof document !== 'undefined' && document.currentScript ? document.currentScript.src : undefined;
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if(_scriptDir){
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scriptDirectory = _scriptDir
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}
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if (scriptDirectory.indexOf("blob:") !== 0) {
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scriptDirectory = scriptDirectory.substr(0,scriptDirectory.lastIndexOf("/")+1)
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} else {
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scriptDirectory = ""
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}
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}
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var read_fn;
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if (ENVIRONMENT_IS_NODE) {
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read_fn = function(filepath)
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{
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return require("fs").readFileSync(require("path").normalize(filepath)).toString()
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};
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} else if (ENVIRONMENT_IS_WEB||ENVIRONMENT_IS_WORKER) {
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read_fn = function(url)
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{ // it's an option to move this over to fetch, but, fetch requires a polyfill for these older browsers anyway - making fetch an automatic dep just for asmjs fallback - and the github/fetch polyfill does not appear to actually support mode (for 'same-origin' policy) anyway - probably not worth it yet
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var xhr = new XMLHttpRequest()
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xhr.open("GET", url, false)
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xhr.send(null)
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//
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return xhr.responseText
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};
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} else {
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throw "Unsupported environment - please implement file reading for asmjs fallback case"
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}
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const filepath = locateFile("MyMoneroCoreCpp_ASMJS.asm.js", scriptDirectory)
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const content = read_fn(filepath)
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// TODO: verify content - for now, relying on same-origin and tls/ssl
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var Module = {}
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try {
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eval(content) // I do not believe this is a safety concern, because content is server-controlled; https://humanwhocodes.com/blog/2013/06/25/eval-isnt-evil-just-misunderstood/
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} catch (e) {
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reject(e)
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return
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}
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setTimeout(function()
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{ // "delaying even 1ms is enough to allow compilation memory to be reclaimed"
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Module_template['asm'] = Module['asm']
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Module = null
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resolve(new MyMoneroCoreBridgeClass(require("./MyMoneroCoreCpp_ASMJS")(Module_template)))
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}, 1)
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}
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});
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};
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