337 lines
12 KiB
JavaScript
337 lines
12 KiB
JavaScript
var events = require('events');
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var async = require('async');
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var varDiff = require('./varDiff.js');
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var daemon = require('./daemon.js');
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var stratum = require('./stratum.js');
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var jobManager = require('./jobManager.js');
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var util = require('./util.js');
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/**
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* Main pool object. It emits the following events:
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* - started() - when the pool is effectively started
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* - share(isValidShare, isValidBlock, shareData) - When a share is submitted
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* - log(severity, key, text) - for debug, warning, and error messages
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*
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* It initializes and connects:
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* - JobManager - for generating miner work, processing block templates and shares
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* - DaemonInterface - for RPC communication with daemon
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* - StratumServer - for TCP socket communication with miners
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*
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*/
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var pool = module.exports = function pool(options, authorizeFn){
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this.options = options;
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var _this = this;
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var publicKeyBuffer;
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var emitLog = function(key, text) { _this.emit('log', 'debug' , key, text); };
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var emitWarningLog = function(key, text) { _this.emit('log', 'warning', key, text); };
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var emitErrorLog = function(key, text) { _this.emit('log', 'error' , key, text); };
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(function Init(){
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//timeout used so onLog event can be hooked before we start initializing
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setTimeout(function(){
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SetupJobManager();
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SetupVarDiff();
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SetupDaemonInterface();
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}, 10);
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})();
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function SetupVarDiff(){
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if (!options.varDiff.enabled){
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emitLog('system', 'VarDiff has been disabled');
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return;
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}
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_this.varDiff = new varDiff(options.varDiff, options.difficulty);
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_this.varDiff.on('difficultyRequest', function(){
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emitLog('varDiff', 'Difficulty requested for vardiff');
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if (_this.stratumServer)
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RequestDifficulty(function(){});
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}).on('newDifficulty', function(client, newDiff){
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client.sendDifficulty(newDiff);
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client.sendMiningJob(_this.jobManager.currentJob.getJobParams());
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});
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emitLog("system", "VarDiff enabled and setup");
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}
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function RequestDifficulty(callback){
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_this.daemon.cmd('getdifficulty',
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[],
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function(error, result){
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if (error) {
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emitErrorLog('getdifficulty', 'Error requesting difficulty from daemon for vardiff');
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} else {
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if (options.varDiff.enabled)
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_this.varDiff.setNetworkDifficulty(result);
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callback(error, result);
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}
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}
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);
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}
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/*
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Coin daemons either use submitblock or getblocktemplate for submitting new blocks
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*/
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function SubmitBlock(blockHex, callback){
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if (options.hasSubmitMethod) {
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_this.daemon.cmd('submitblock',
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[blockHex],
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function(error, result){
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if (error)
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emitErrorLog('submitblock', 'rpc error when submitting block with submitblock')
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else
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emitLog('submitblock', 'Submitted Block using submitblock');
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callback();
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}
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);
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} else {
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_this.daemon.cmd('getblocktemplate',
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[{'mode': 'submit', 'data': blockHex}],
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function(error, result){
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if (error)
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emitErrorLog('submitblock', 'rpc error when submitting block with getblocktemplate')
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else
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emitLog('submitblock', 'Submitted Block using getblocktemplate');
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callback()
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}
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);
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}
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}
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function SetupJobManager(){
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_this.jobManager = new jobManager({
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algorithm : options.algorithm,
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address : options.address
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});
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_this.jobManager.on('newBlock', function(blockTemplate){
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//Check if stratumServer has been initialized yet
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if ( typeof(_this.stratumServer ) !== 'undefined') {
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emitLog('system', 'Detected new block');
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_this.stratumServer.broadcastMiningJobs(blockTemplate.getJobParams());
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}
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}).on('share', function(shareData, blockHex){
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var isValidShare = !shareData.error;
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var isValidBlock = !!blockHex;
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var emitShare = function(){
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_this.emit('share', isValidShare, isValidBlock, shareData);
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};
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/*
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If we calculated that the block solution was found,
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before we emit the share, lets submit the block,
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then check if it was accepted using RPC getblock
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*/
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if (!isValidBlock)
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emitShare();
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else{
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SubmitBlock(blockHex, function(){
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CheckBlockAccepted(shareData.solution, function(isAccepted){
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isValidBlock = isAccepted;
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emitShare();
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});
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});
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}
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});
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}
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function SetupDaemonInterface(){
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emitLog('system','Connecting to daemon');
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_this.daemon = new daemon.interface(options.daemon);
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_this.daemon.on('online', function(){
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async.parallel({
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networkDifficulty: RequestDifficulty,
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addressInfo: function(callback){
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_this.daemon.cmd('validateaddress',
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[options.address],
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function(error, result){
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if (error){
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emitErrorLog('system','validateaddress rpc error');
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callback(error);
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} else if (!result.isvalid) {
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emitErrorLog('system','address is not valid');
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callback("address-not-valid");
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} else {
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callback(error, result);
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}
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}
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);
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},
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submitMethod: function(callback){
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/*
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This checks to see whether the daemon uses submitblock
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or getblocktemplate for submitting new blocks
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*/
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_this.daemon.cmd('submitblock',
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[],
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function(error, result){
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if (error && error.message === 'Method not found')
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callback(null, false);
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else
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callback(null, true);
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}
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);
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}
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}, function(err, results){
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if (err) return;
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emitLog('system','Connected to daemon');
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options.hasSubmitMethod = results.submitMethod;
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publicKeyBuffer = options.reward === 'POW' ?
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util.script_to_address(results.addressInfo.address) :
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util.script_to_pubkey(results.addressInfo.pubkey);
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if (options.difficulty > results.networkDifficulty && options.difficulty > 16){
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var newDiff = results.networkDifficulty > 16 ? results.networkDifficulty : 16;
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emitWarningLog('system', 'pool difficulty was set higher than network difficulty');
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emitWarningLog('system', 'lowering pool diff from ' + options.difficulty + ' to ' + newDiff);
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options.difficulty = newDiff
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if (options.varDiff.enabled)
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_this.varDiff.setPoolDifficulty(options.difficulty);
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}
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GetBlockTemplate(function(error, result){
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if (error)
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emitErrorLog('system', 'Error with initial getblocktemplate');
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else{
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SetupBlockPolling();
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StartStratumServer();
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}
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});
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});
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}).on('startFailed', function(){
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emitErrorLog('system','Failed to start daemon');
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}).on('error', function(message){
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emitErrorLog('system', message);
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});
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}
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function StartStratumServer(){
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emitLog('system', 'Stratum server starting on port ' + options.stratumPort);
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_this.stratumServer = new stratum.Server({
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port: options.stratumPort,
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authorizeFn: authorizeFn
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});
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_this.stratumServer.on('started', function(){
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emitLog('system','Stratum server started on port ' + options.stratumPort);
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_this.emit('started');
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}).on('client.connected', function(client){
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if (options.varDiff.enabled)
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_this.varDiff.manageClient(client);
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client.on('subscription', function(params, resultCallback){
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var extraNonce = _this.jobManager.extraNonceCounter.next();
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var extraNonce2Size = _this.jobManager.extraNonce2Size;
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resultCallback(null,
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extraNonce,
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extraNonce2Size
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);
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this.sendDifficulty(options.difficulty);
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this.sendMiningJob(_this.jobManager.currentJob.getJobParams());
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}).on('submit', function(params, resultCallback){
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var result =_this.jobManager.processShare(
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params.jobId,
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client.difficulty,
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client.extraNonce1,
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params.extraNonce2,
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params.nTime,
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params.nonce,
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client.socket.remoteAddress,
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params.name
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);
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resultCallback(result.error, result.result ? true : null);
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}).on('malformedMessage', function (message) {
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emitWarningLog('client', client.workerName+" has sent us a malformed message: "+message);
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}).on('socketError', function() {
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emitWarningLog('client', client.workerName+" has somehow had a socket error");
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}).on('socketDisconnect', function() {
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emitLog('client', "Client '"+client.workerName+"' disconnected!");
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}).on('unknownStratumMethod', function(fullMessage) {
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emitLog('client', "Client '"+client.workerName+"' has sent us an unknown stratum method: "+fullMessage.method);
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});
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});
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}
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function SetupBlockPolling(){
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if (options.blockRefreshInterval === 0){
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emitLog('system', 'Block template polling has been disabled');
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return;
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}
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var pollingInterval = options.blockRefreshInterval * 1000;
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setInterval(function () {
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GetBlockTemplate(function(error, result) {
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if (error) {
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emitErrorLog('system', "Block polling error getting block template for " + options.name)
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}
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});
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}, pollingInterval);
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emitLog('system', 'Block polling every ' + pollingInterval + ' milliseconds');
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}
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function GetBlockTemplate(callback){
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_this.daemon.cmd('getblocktemplate',
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[{"capabilities": [ "coinbasetxn", "workid", "coinbase/append" ]}],
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function(error, result){
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if (error) {
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callback(error);
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} else {
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_this.jobManager.processTemplate(result, publicKeyBuffer);
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callback(null, result);
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}
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}
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);
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}
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function CheckBlockAccepted(blockHash, callback){
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_this.daemon.cmd('getblock',
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[blockHash],
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function(error, result){
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if (error)
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callback(false);
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else if (result.hash === blockHash)
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callback(true);
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else
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callback(false);
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}
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);
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}
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/**
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* This method is being called from the blockNotify so that when a new block is discovered by the daemon
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* We can inform our miners about the newly found block
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**/
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this.processBlockNotify = function(blockHash){
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if (blockHash !== _this.jobManager.currentJob.rpcData.previousblockhash){
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GetBlockTemplate(function(error, result){
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if (error)
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emitErrorLog('system', 'Block notify error getting block template for ' + options.name);
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})
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}
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}
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};
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pool.prototype.__proto__ = events.EventEmitter.prototype; |