Rip the worker logic out of message_receiver and add the functionality for it to work with pow. Fix pow tests to work with those changes
Beaudan
6 years ago
parent
37abdc6a4e
commit
6113f13d3a
File diff suppressed because it is too large
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@ -0,0 +1,124 @@
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/* global Worker, window, setTimeout */
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const WORKER_TIMEOUT = 60 * 1000; // one minute
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class TimedOutError extends Error {
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constructor(message) {
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super(message);
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this.name = this.constructor.name;
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if (typeof Error.captureStackTrace === 'function') {
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Error.captureStackTrace(this, this.constructor);
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} else {
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this.stack = (new Error(message)).stack;
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}
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}
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}
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class WorkerInterface {
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constructor(path) {
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this._utilWorker = new Worker(path);
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this._jobs = Object.create(null);
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this._DEBUG = false;
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this._jobCounter = 0;
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this._utilWorker.onmessage = e => {
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const [jobId, errorForDisplay, result] = e.data;
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const job = this._getJob(jobId);
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if (!job) {
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throw new Error(
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`Received worker reply to job ${jobId}, but did not have it in our registry!`
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);
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}
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const { resolve, reject, fnName } = job;
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if (errorForDisplay) {
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return reject(
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new Error(
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`Error received from worker job ${jobId} (${fnName}): ${errorForDisplay}`
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)
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);
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}
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return resolve(result);
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};
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}
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_makeJob (fnName) {
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this._jobCounter += 1;
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const id = this._jobCounter;
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if (this._DEBUG) {
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window.log.info(`Worker job ${id} (${fnName}) started`);
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}
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this._jobs[id] = {
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fnName,
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start: Date.now(),
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};
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return id;
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};
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_updateJob(id, data) {
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const { resolve, reject } = data;
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const { fnName, start } = this._jobs[id];
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this._jobs[id] = {
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...this._jobs[id],
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...data,
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resolve: value => {
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this._removeJob(id);
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const end = Date.now();
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window.log.info(
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`Worker job ${id} (${fnName}) succeeded in ${end - start}ms`
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);
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return resolve(value);
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},
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reject: error => {
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this._removeJob(id);
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const end = Date.now();
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window.log.info(
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`Worker job ${id} (${fnName}) failed in ${end - start}ms`
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);
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return reject(error);
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},
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};
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};
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_removeJob(id) {
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if (this._DEBUG) {
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this._jobs[id].complete = true;
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} else {
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delete this._jobs[id];
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}
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}
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_getJob(id) {
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return this._jobs[id];
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};
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callWorker(fnName, ...args) {
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const jobId = this._makeJob(fnName);
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return new Promise((resolve, reject) => {
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this._utilWorker.postMessage([jobId, fnName, ...args]);
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this._updateJob(jobId, {
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resolve,
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reject,
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args: this._DEBUG ? args : null,
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});
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setTimeout(
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() => reject(new TimedOutError(`Worker job ${jobId} (${fnName}) timed out`)),
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WORKER_TIMEOUT
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);
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});
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};
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}
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module.exports = {
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WorkerInterface,
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TimedOutError,
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};
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@ -1,134 +1,132 @@
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const hash = require('js-sha512');
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const bb = require('bytebuffer');
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const { BigInteger } = require('jsbn');
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module.exports = {
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calcTarget,
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incrementNonce,
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bufferToBase64,
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bigIntToUint8Array,
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greaterThan,
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};
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/* global dcodeIO, crypto, JSBI */
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const NONCE_LEN = 8;
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// Modify this value for difficulty scaling
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const DEV_NONCE_TRIALS = 10;
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const PROD_NONCE_TRIALS = 1000;
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let development = true;
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// Increment Uint8Array nonce by 1 with carrying
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function incrementNonce(nonce) {
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let idx = NONCE_LEN - 1;
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const newNonce = new Uint8Array(nonce);
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newNonce[idx] += 1;
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// Nonce will just reset to 0 if all values are 255 causing infinite loop
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while (newNonce[idx] === 0 && idx > 0) {
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idx -= 1;
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const pow = {
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// Increment Uint8Array nonce by 1 with carrying
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incrementNonce(nonce) {
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let idx = NONCE_LEN - 1;
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const newNonce = new Uint8Array(nonce);
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newNonce[idx] += 1;
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}
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return newNonce;
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}
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// Nonce will just reset to 0 if all values are 255 causing infinite loop
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while (newNonce[idx] === 0 && idx > 0) {
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idx -= 1;
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newNonce[idx] += 1;
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}
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return newNonce;
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},
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// Convert a Uint8Array to a base64 string
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function bufferToBase64(buf) {
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function mapFn(ch) {
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return String.fromCharCode(ch);
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}
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const binaryString = Array.prototype.map.call(buf, mapFn).join('');
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return bb.btoa(binaryString);
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}
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// Convert a Uint8Array to a base64 string
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bufferToBase64(buf) {
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function mapFn(ch) {
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return String.fromCharCode(ch);
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}
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const binaryString = Array.prototype.map.call(buf, mapFn).join('');
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return dcodeIO.ByteBuffer.btoa(binaryString);
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},
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// Convert BigInteger to Uint8Array of length NONCE_LEN
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function bigIntToUint8Array(bigInt) {
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const arr = new Uint8Array(NONCE_LEN);
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let n;
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for (let idx = NONCE_LEN - 1; idx >= 0; idx -= 1) {
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n = NONCE_LEN - (idx + 1);
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// 256 ** n is the value of one bit in arr[idx], modulus to carry over
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// (bigInt / 256**n) % 256;
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const uint8Val = bigInt
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.divide(new BigInteger('256').pow(n))
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.mod(new BigInteger('256'));
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arr[idx] = uint8Val.intValue();
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}
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return arr;
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}
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// Convert BigInteger to Uint8Array of length NONCE_LEN
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bigIntToUint8Array(bigInt) {
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const arr = new Uint8Array(NONCE_LEN);
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let n;
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for (let idx = NONCE_LEN - 1; idx >= 0; idx -= 1) {
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n = NONCE_LEN - (idx + 1);
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// 256 ** n is the value of one bit in arr[idx], modulus to carry over
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// (bigInt / 256**n) % 256;
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const denominator = JSBI.exponentiate(
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JSBI.BigInt('256'),
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JSBI.BigInt(n)
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);
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const fraction = JSBI.divide(bigInt, denominator);
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const uint8Val = JSBI.remainder(fraction, JSBI.BigInt(256));
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arr[idx] = JSBI.toNumber(uint8Val);
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}
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return arr;
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},
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// Compare two Uint8Arrays, return true if arr1 is > arr2
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function greaterThan(arr1, arr2) {
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// Early exit if lengths are not equal. Should never happen
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if (arr1.length !== arr2.length) return false;
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// Compare two Uint8Arrays, return true if arr1 is > arr2
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greaterThan(arr1, arr2) {
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// Early exit if lengths are not equal. Should never happen
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if (arr1.length !== arr2.length) return false;
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for (let i = 0, len = arr1.length; i < len; i += 1) {
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if (arr1[i] > arr2[i]) return true;
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if (arr1[i] < arr2[i]) return false;
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}
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return false;
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}
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for (let i = 0, len = arr1.length; i < len; i += 1) {
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if (arr1[i] > arr2[i]) return true;
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if (arr1[i] < arr2[i]) return false;
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}
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return false;
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},
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// Return nonce that hashes together with payload lower than the target
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function calcPoW(timestamp, ttl, pubKey, data) {
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const payload = new Uint8Array(
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bb.wrap(timestamp.toString() + ttl.toString() + pubKey + data, 'binary').toArrayBuffer()
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);
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// Return nonce that hashes together with payload lower than the target
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async calcPoW(timestamp, ttl, pubKey, data, development = false) {
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const payload = new Uint8Array(
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dcodeIO.ByteBuffer.wrap(
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timestamp.toString() + ttl.toString() + pubKey + data,
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'binary'
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).toArrayBuffer()
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);
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const target = calcTarget(ttl, payload.length);
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const nonceTrials = development ? DEV_NONCE_TRIALS : PROD_NONCE_TRIALS;
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const target = pow.calcTarget(ttl, payload.length, nonceTrials);
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let nonce = new Uint8Array(NONCE_LEN);
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let trialValue = bigIntToUint8Array(
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new BigInteger(Number.MAX_SAFE_INTEGER.toString())
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);
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const initialHash = new Uint8Array(
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bb.wrap(hash(payload), 'hex').toArrayBuffer()
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);
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const innerPayload = new Uint8Array(initialHash.length + NONCE_LEN);
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innerPayload.set(initialHash, NONCE_LEN);
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let resultHash;
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while (greaterThan(trialValue, target)) {
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nonce = incrementNonce(nonce);
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innerPayload.set(nonce);
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resultHash = hash(innerPayload);
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trialValue = new Uint8Array(
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bb.wrap(resultHash, 'hex').toArrayBuffer()
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).slice(0, NONCE_LEN);
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}
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return bufferToBase64(nonce);
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}
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let nonce = new Uint8Array(NONCE_LEN);
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let trialValue = pow.bigIntToUint8Array(
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JSBI.BigInt(Number.MAX_SAFE_INTEGER)
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);
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const initialHash = new Uint8Array(
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await crypto.subtle.digest('SHA-512', payload)
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);
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const innerPayload = new Uint8Array(initialHash.length + NONCE_LEN);
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innerPayload.set(initialHash, NONCE_LEN);
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let resultHash;
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while (pow.greaterThan(trialValue, target)) {
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nonce = pow.incrementNonce(nonce);
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innerPayload.set(nonce);
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// eslint-disable-next-line no-await-in-loop
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resultHash = await crypto.subtle.digest('SHA-512', innerPayload);
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trialValue = new Uint8Array(
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dcodeIO.ByteBuffer.wrap(resultHash, 'hex').toArrayBuffer()
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).slice(0, NONCE_LEN);
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}
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return pow.bufferToBase64(nonce);
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},
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function calcTarget(ttl, payloadLen) {
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// payloadLength + NONCE_LEN
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const totalLen = new BigInteger(payloadLen.toString()).add(
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new BigInteger(NONCE_LEN.toString())
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);
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// ttl * totalLen
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const ttlMult = new BigInteger(ttl.toString()).multiply(totalLen);
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// ttlMult / (2^16 - 1)
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const innerFrac = ttlMult.divide(
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new BigInteger('2').pow(16).subtract(new BigInteger('1'))
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);
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// totalLen + innerFrac
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const lenPlusInnerFrac = totalLen.add(innerFrac);
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// nonceTrials * lenPlusInnerFrac
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const nonceTrials = development ? DEV_NONCE_TRIALS : PROD_NONCE_TRIALS;
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const denominator = new BigInteger(nonceTrials.toString()).multiply(
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lenPlusInnerFrac
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);
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// 2^64 - 1
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const two64 = new BigInteger('2').pow(64).subtract(new BigInteger('1'));
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// two64 / denominator
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const targetNum = two64.divide(denominator);
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return bigIntToUint8Array(targetNum);
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}
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// Start calculation in child process when main process sends message data
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process.on('message', msg => {
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({ development } = msg);
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process.send({
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nonce: calcPoW(
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msg.timestamp,
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msg.ttl,
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msg.pubKey,
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msg.data
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),
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});
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});
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calcTarget(ttl, payloadLen, nonceTrials = PROD_NONCE_TRIALS) {
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// payloadLength + NONCE_LEN
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const totalLen = JSBI.add(
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JSBI.BigInt(payloadLen),
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JSBI.BigInt(NONCE_LEN)
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);
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// ttl * totalLen
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const ttlMult = JSBI.multiply(
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JSBI.BigInt(ttl),
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JSBI.BigInt(totalLen)
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);
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// 2^16 - 1
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const two16 = JSBI.subtract(
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JSBI.exponentiate(JSBI.BigInt(2), JSBI.BigInt(16)), // 2^16
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JSBI.BigInt(1)
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);
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// ttlMult / two16
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const innerFrac = JSBI.divide(
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ttlMult,
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two16
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);
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// totalLen + innerFrac
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const lenPlusInnerFrac = JSBI.add(totalLen, innerFrac);
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// nonceTrials * lenPlusInnerFrac
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const denominator = JSBI.multiply(
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JSBI.BigInt(nonceTrials),
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lenPlusInnerFrac
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);
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// 2^64 - 1
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const two64 = JSBI.subtract(
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JSBI.exponentiate(JSBI.BigInt(2), JSBI.BigInt(64)), // 2^64
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JSBI.BigInt(1)
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);
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// two64 / denominator
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const targetNum = JSBI.divide(two64, denominator);
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return pow.bigIntToUint8Array(targetNum);
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},
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};
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