ethstats-server/lib/node.js

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var geoip = require('geoip-lite');
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var _ = require('lodash');
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var MAX_HISTORY = 40;
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var MAX_INACTIVE_TIME = 1000*60*60*4;
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var Node = function(data)
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{
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this.id = null;
this.info = {};
this.geo = {}
this.stats = {
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active: false,
mining: false,
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hashrate: 0,
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peers: 0,
pending: 0,
gasPrice: 0,
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block: {
number: 0,
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hash: '0x0000000000000000000000000000000000000000000000000000000000000000',
difficulty: 0,
totalDifficulty: 0,
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gasLimit: 0,
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timestamp: 0,
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time: 0,
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arrival: 0,
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received: 0,
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propagation: 0,
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transactions: [],
uncles: []
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},
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propagationAvg: 0,
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latency: 0,
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uptime: 100
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};
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this.history = new Array(MAX_HISTORY);
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this.uptime = {
started: null,
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up: 0,
down: 0,
lastStatus: null,
lastUpdate: null
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};
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this.init(data);
return this;
}
Node.prototype.init = function(data)
{
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_.fill(this.history, -1);
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if( this.id === null && this.uptime.started === null )
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this.setState(true);
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this.id = _.result(data, 'id', this.id);
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if( !_.isUndefined(data.latency) )
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this.stats.latency = data.latency;
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this.setInfo(data);
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}
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Node.prototype.setInfo = function(data)
{
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if( !_.isUndefined(data.info) )
{
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this.info = data.info;
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if( !_.isUndefined(data.info.canUpdateHistory) )
{
this.info.canUpdateHistory = _.result(data, 'info.canUpdateHistory', false);
}
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}
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if( !_.isUndefined(data.ip) )
{
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this.setGeo(data.ip);
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}
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this.spark = _.result(data, 'spark', null);
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this.setState(true);
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}
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Node.prototype.setGeo = function(ip)
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{
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this.info.ip = ip;
this.geo = geoip.lookup(ip);
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}
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Node.prototype.getInfo = function()
{
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return {
id: this.id,
info: this.info,
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stats: {
active: this.stats.active,
mining: this.stats.mining,
hashrate: this.stats.hashrate,
peers: this.stats.peers,
gasPrice: this.stats.gasPrice,
block: this.stats.block,
propagationAvg: this.stats.propagationAvg,
uptime: this.stats.uptime,
latency: this.stats.latency,
pending: this.stats.pending,
},
history: this.history,
geo: this.geo
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};
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}
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Node.prototype.setStats = function(stats, history)
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{
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if( !_.isUndefined(stats) )
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{
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this.setBlock( _.result(stats, 'block', this.stats.block), history );
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this.setBasicStats(stats);
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this.setPending( _.result(stats, 'pending', this.stats.pending) );
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return this.getStats();
}
return false;
}
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Node.prototype.setBlock = function(block, history)
{
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if( !_.isUndefined(block) && !_.isUndefined(block.number) && ( !_.isEqual(history, this.history) || !_.isEqual(block, this.stats.block) ))
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{
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if(block.number !== this.stats.block.number && block.hash !== this.stats.block.hash)
{
this.stats.block = block;
}
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this.setHistory(history);
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return this.getBlockStats();
}
return false;
}
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Node.prototype.setHistory = function(history)
{
if( _.isEqual(history, this.history) )
{
return false;
}
if( !_.isArray(history) )
{
this.history = _.fill( new Array(MAX_HISTORY), -1 );
this.stats.propagationAvg = 0;
return true;
}
this.history = history;
var positives = _.filter(history, function(p) {
return p >= 0;
});
this.stats.propagationAvg = ( positives.length > 0 ? Math.round( _.sum(positives) / positives.length ) : 0 );
positives = null;
return true;
}
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Node.prototype.setPending = function(stats)
{
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if( !_.isUndefined(stats) && !_.isUndefined(stats.pending) && !_.isEqual(stats.pending, this.stats.pending))
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{
this.stats.pending = stats.pending;
return {
id: this.id,
pending: this.stats.pending
};
}
return false;
}
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Node.prototype.setBasicStats = function(stats)
{
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if( !_.isUndefined(stats) && !_.isEqual(stats, {
active: this.stats.active,
mining: this.stats.mining,
hashrate: this.stats.hashrate,
peers: this.stats.peers,
gasPrice: this.stats.gasPrice,
uptime: this.stats.uptime
}) )
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{
this.stats.active = stats.active;
this.stats.mining = stats.mining;
this.stats.hashrate = stats.hashrate;
this.stats.peers = stats.peers;
this.stats.gasPrice = stats.gasPrice;
this.stats.uptime = stats.uptime;
return this.getBasicStats();
}
return false;
}
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Node.prototype.setLatency = function(latency)
{
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if( !_.isUndefined(latency) && !_.isEqual(latency, this.stats.latency) )
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{
this.stats.latency = latency;
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return {
id: this.id,
latency: latency
};
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}
return false;
}
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Node.prototype.getStats = function()
{
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return {
id: this.id,
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stats: {
active: this.stats.active,
mining: this.stats.mining,
hashrate: this.stats.hashrate,
peers: this.stats.peers,
gasPrice: this.stats.gasPrice,
block: this.stats.block,
propagationAvg: this.stats.propagationAvg,
uptime: this.stats.uptime,
pending: this.stats.pending
},
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history: this.history
};
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}
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Node.prototype.getBlockStats = function()
{
return {
id: this.id,
block: this.stats.block,
propagationAvg: this.stats.propagationAvg,
history: this.history
};
}
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Node.prototype.getBasicStats = function()
{
return {
id: this.id,
stats: {
active: this.stats.active,
mining: this.stats.mining,
hashrate: this.stats.hashrate,
peers: this.stats.peers,
gasPrice: this.stats.gasPrice,
uptime: this.stats.uptime
}
};
}
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Node.prototype.setState = function(active)
{
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var now = _.now();
if(this.uptime.started !== null)
{
if(this.uptime.lastStatus === active)
{
this.uptime[(active ? 'up' : 'down')] += now - this.uptime.lastUpdate;
}
else
{
this.uptime[(active ? 'down' : 'up')] += now - this.uptime.lastUpdate;
}
}
else
{
this.uptime.started = now;
}
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this.stats.active = active;
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this.uptime.lastStatus = active;
this.uptime.lastUpdate = now;
this.stats.uptime = this.calculateUptime();
now = undefined;
}
Node.prototype.calculateUptime = function()
{
if(this.uptime.lastUpdate === this.uptime.started)
{
return 100;
}
return Math.round( this.uptime.up / (this.uptime.lastUpdate - this.uptime.started) * 100);
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}
Node.prototype.getBlockNumber = function()
{
return this.stats.block.number;
}
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Node.prototype.canUpdate = function()
{
return this.info.canUpdateHistory || false;
}
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Node.prototype.isInactiveAndOld = function()
{
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if( this.uptime.lastStatus === false && this.uptime.lastUpdate !== null && (_.now() - this.uptime.lastUpdate) > MAX_INACTIVE_TIME )
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{
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return true;
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}
return false;
}
module.exports = Node;