83 lines
2.0 KiB
JavaScript
83 lines
2.0 KiB
JavaScript
'use strict';
|
|
var BaseService = require('../../service');
|
|
var util = require('util');
|
|
var Encoding = require('./encoding');
|
|
var index = require('../../index');
|
|
var log = index.log;
|
|
|
|
var MempoolService = function(options) {
|
|
BaseService.call(this, options);
|
|
this._db = this.node.services.db;
|
|
};
|
|
|
|
util.inherits(MempoolService, BaseService);
|
|
|
|
MempoolService.dependencies = ['db'];
|
|
|
|
MempoolService.prototype.getAPIMethods = function() {
|
|
var methods = [
|
|
['getMempoolTransaction', this, this.getTransaction, 1]
|
|
];
|
|
return methods;
|
|
};
|
|
|
|
MempoolService.prototype.start = function(callback) {
|
|
var self = this;
|
|
|
|
self._db.getPrefix(self.name, function(err, prefix) {
|
|
if(err) {
|
|
return callback(err);
|
|
}
|
|
self._encoding = new Encoding(prefix);
|
|
self._startSubscriptions();
|
|
callback();
|
|
});
|
|
};
|
|
|
|
MempoolService.prototype._startSubscriptions = function() {
|
|
|
|
if (this._subscribed) {
|
|
return;
|
|
}
|
|
|
|
this._subscribed = true;
|
|
if (!this._bus) {
|
|
this._bus = this.node.openBus({remoteAddress: 'localhost-mempool'});
|
|
}
|
|
|
|
//this._bus.on('p2p/block', this._onBlock.bind(this));
|
|
this._bus.on('p2p/transaction', this._onTransaction.bind(this));
|
|
|
|
//this._bus.subscribe('p2p/block');
|
|
this._bus.subscribe('p2p/transaction');
|
|
};
|
|
|
|
MempoolService.prototype.onBlock = function(block, callback) {
|
|
// remove this block's txs from mempool
|
|
var self = this;
|
|
var ops = block.txs.map(function(tx) {
|
|
return {
|
|
type: 'del',
|
|
key: self._encoding.encodeMempoolTransactionKey(tx.txid())
|
|
};
|
|
});
|
|
setImmediate(callback);
|
|
};
|
|
|
|
MempoolService.prototype._onTransaction = function(tx) {
|
|
this._db.put(this._encoding.encodeMempoolTransactionKey(tx.txid()),
|
|
this._encoding.encodeMempoolTransactionValue(tx));
|
|
};
|
|
|
|
MempoolService.prototype.getMempoolTransaction = function(txid, callback) {
|
|
this._db.get(this._encoding.encodeMempoolTransactionKey(txid), callback);
|
|
};
|
|
|
|
MempoolService.prototype.stop = function(callback) {
|
|
callback();
|
|
};
|
|
|
|
|
|
module.exports = MempoolService;
|
|
|