2014-01-10 11:02:33 -08:00
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'use strict';
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2014-01-07 10:21:59 -08:00
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2014-01-10 11:02:33 -08:00
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require('classtool');
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2014-01-08 09:50:37 -08:00
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2014-01-10 11:02:33 -08:00
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function spec() {
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2014-01-16 12:25:52 -08:00
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var sockets = require('../app/controllers/socket.js');
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2014-02-03 18:30:46 -08:00
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var BlockDb = require('./BlockDb').class();
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var TransactionDb = require('./TransactionDb').class();
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2014-01-19 07:33:39 -08:00
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var async = require('async');
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2014-01-15 12:36:49 -08:00
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2014-01-10 11:57:16 -08:00
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2014-01-16 18:23:10 -08:00
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function Sync() {
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2014-01-10 11:57:16 -08:00
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}
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2014-01-18 13:28:24 -08:00
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Sync.prototype.init = function(opts, cb) {
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2014-01-19 07:33:39 -08:00
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var self = this;
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self.opts = opts;
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2014-02-08 05:57:37 -08:00
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this.bDb = new BlockDb(opts);
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this.txDb = new TransactionDb(opts);
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2014-02-05 05:16:40 -08:00
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return cb();
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2014-01-18 13:28:24 -08:00
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};
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2014-02-05 06:23:41 -08:00
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Sync.prototype.close = function(cb) {
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var self = this;
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self.txDb.close(function() {
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self.bDb.close(cb);
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});
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2014-01-18 13:28:24 -08:00
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};
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2014-01-19 07:33:39 -08:00
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Sync.prototype.destroy = function(next) {
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var self = this;
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async.series([
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2014-02-05 06:23:41 -08:00
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function(b) { self.bDb.drop(b); },
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2014-02-04 21:48:54 -08:00
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function(b) { self.txDb.drop(b); },
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2014-01-19 07:33:39 -08:00
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], next);
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};
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2014-01-30 18:16:43 -08:00
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2014-02-08 05:57:37 -08:00
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/*
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* Arrives a NEW block, which is the new TIP
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*
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* Case 0) Simple case
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* A-B-C-D-E(TIP)-NEW
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*
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* Case 1)
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* A-B-C-D-E(TIP)
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* \
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* NEW
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*
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* 1) Declare D-E orphans (and possible invalidate TXs on them)
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*
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* Case 2)
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* A-B-C-D-E(TIP)
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* \
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* F-G-NEW
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* 1) Set F-G as connected (mark TXs as valid)
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* 2) Declare D-E orphans (and possible invalidate TXs on them)
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*
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*
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* Case 3)
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*
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* A-B-C-D-E(TIP) ... NEW
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*
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2014-02-08 11:20:51 -08:00
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* NEW is ignored
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2014-02-08 05:57:37 -08:00
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*
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*/
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2014-02-03 18:30:46 -08:00
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2014-02-08 15:09:54 -08:00
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Sync.prototype.storeTipBlock = function(b, allowReorgs, cb) {
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if (typeof allowReorgs === 'function') {
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cb = allowReorgs;
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allowReorgs = true;
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}
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2014-02-08 11:20:51 -08:00
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if (!b) return cb();
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2014-01-19 07:33:39 -08:00
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var self = this;
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2014-02-08 15:09:54 -08:00
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var oldTip, oldNext, needReorg = false;
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2014-02-08 05:57:37 -08:00
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var newPrev = b.previousblockhash;
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2014-02-10 14:11:13 -08:00
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var updatedAddrs;
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2014-01-15 12:36:49 -08:00
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2014-02-08 05:57:37 -08:00
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async.series([
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2014-02-08 11:20:51 -08:00
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function(c) {
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self.bDb.has(b.hash, function(err, val) {
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return c(err ||
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(val ? new Error('WARN: Ignoring already existing block:' + b.hash) : null ));
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});
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},
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function(c) {
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if (!allowReorgs) return c();
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2014-02-08 11:20:51 -08:00
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self.bDb.has(newPrev, function(err, val) {
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if (!val && newPrev.match(/^0+$/)) return c();
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return c(err ||
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(!val ? new Error('WARN: Ignoring block with non existing prev:' + b.hash) : null ));
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});
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},
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function(c) {
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self.txDb.createFromBlock(b, function(err, addrs) {
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updatedAddrs = addrs;
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return c(err);
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});
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},
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function(c) {
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if (!allowReorgs) return c();
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self.bDb.getTip(function(err, val) {
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oldTip = val;
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if (oldTip && newPrev !== oldTip) needReorg = true;
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2014-02-08 05:57:37 -08:00
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return c();
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});
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},
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function(c) {
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if (!needReorg) return c();
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self.bDb.getNext( newPrev, function(err, val) {
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if (err) return c(err);
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oldNext = val;
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return c();
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});
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},
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function(c) {
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self.bDb.add(b, c);
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},
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function(c) {
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if (!needReorg) return c();
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2014-02-08 11:20:51 -08:00
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console.log('NEW TIP: %s NEED REORG (old tip: %s)', b.hash, oldTip);
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self.processReorg(oldTip, oldNext, newPrev, c);
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},
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function(c) {
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self.bDb.setTip(b.hash, function(err) {
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if (err) return c(err);
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self.bDb.setNext(newPrev, b.hash, function(err) {
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return c(err);
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});
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2014-02-08 05:57:37 -08:00
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});
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}],
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function(err) {
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2014-02-10 14:11:13 -08:00
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if (!err) self._handleBroadcast(b.hash, null, updatedAddrs);
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2014-02-08 11:20:51 -08:00
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if (err && err.toString().match(/WARN/) ) {
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console.log(err);
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err=null;
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}
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2014-02-08 05:57:37 -08:00
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return cb(err);
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2014-02-03 18:30:46 -08:00
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});
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2014-01-10 11:57:16 -08:00
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};
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2014-02-08 05:57:37 -08:00
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Sync.prototype.processReorg = function(oldTip, oldNext, newPrev, cb) {
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2014-02-03 22:22:58 -08:00
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var self = this;
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2014-02-08 11:20:51 -08:00
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var orphanizeFrom;
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2014-02-03 22:22:58 -08:00
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2014-02-08 05:57:37 -08:00
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async.series([
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function(c) {
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self.bDb.isMain(newPrev, function(err,val) {
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if (!val) return c();
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2014-02-08 11:20:51 -08:00
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console.log('# Reorg Case 1)');
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// case 1
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orphanizeFrom = oldNext;
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return c(err);
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});
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},
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function(c) {
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if (orphanizeFrom) return c();
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2014-02-04 14:55:58 -08:00
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2014-02-08 11:20:51 -08:00
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console.log('# Reorg Case 2)');
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self.setBranchConnectedBackwards(newPrev, function(err, yHash, newYHashNext) {
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if (err) return c(err);
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self.bDb.getNext(yHash, function(err, yHashNext) {
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orphanizeFrom = yHashNext;
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2014-02-08 11:20:51 -08:00
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self.bDb.setNext(yHash, newYHashNext, function(err) {
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return c(err);
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});
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2014-02-08 05:57:37 -08:00
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});
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});
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},
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function(c) {
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if (!orphanizeFrom) return c();
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self.setBranchOrphan(orphanizeFrom, function(err) {
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return c(err);
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});
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2014-02-03 22:22:58 -08:00
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},
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2014-02-08 05:57:37 -08:00
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],
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function(err) {
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return cb(err);
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});
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};
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2014-02-08 11:20:51 -08:00
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Sync.prototype.setBlockMain = function(hash, isMain, cb) {
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var self = this;
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self.bDb.setMain(hash, isMain, function(err) {
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if (err) return cb(err);
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return self.txDb.handleBlockChange(hash, isMain, cb);
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});
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};
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2014-02-08 05:57:37 -08:00
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Sync.prototype.setBranchOrphan = function(fromHash, cb) {
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var self = this,
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hashInterator = fromHash;
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async.whilst(
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function() { return hashInterator; },
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function(c) {
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self.setBlockMain(hashInterator, false, function(err) {
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if (err) return cb(err);
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self.bDb.getNext(hashInterator, function (err, val) {
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hashInterator = val;
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return c(err);
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});
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});
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}, cb);
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};
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Sync.prototype.setBranchConnectedBackwards = function(fromHash, cb) {
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var self = this,
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hashInterator = fromHash,
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lastHash = fromHash,
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isMain;
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async.doWhilst(
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function(c) {
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self.setBlockMain(hashInterator, true, function (err) {
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if (err) return c(err);
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self.bDb.getPrev(hashInterator, function (err, val) {
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if (err) return c(err);
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lastHash = hashInterator;
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hashInterator = val;
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self.bDb.isMain(hashInterator, function (err, val) {
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isMain = val;
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return c();
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2014-02-04 14:55:58 -08:00
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});
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2014-02-08 05:57:37 -08:00
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});
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2014-02-03 22:22:58 -08:00
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});
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},
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2014-02-08 11:20:51 -08:00
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function() { return hashInterator && !isMain; },
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function(err) {
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console.log('\tFound yBlock:', hashInterator);
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return cb(err, hashInterator, lastHash);
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}
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);
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2014-02-03 22:22:58 -08:00
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};
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2014-01-16 08:01:32 -08:00
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2014-02-08 05:57:37 -08:00
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Sync.prototype._handleBroadcast = function(hash, updatedTxs, updatedAddrs) {
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var self = this;
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2014-01-10 11:57:16 -08:00
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2014-02-09 14:33:39 -08:00
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if (self.opts.shouldBroadcast) {
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if (hash) {
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sockets.broadcastBlock(hash);
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}
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2014-01-29 10:10:36 -08:00
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2014-02-09 14:33:39 -08:00
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if (updatedTxs) {
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updatedTxs.forEach(function(tx) {
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sockets.broadcastTx(tx);
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});
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}
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2014-01-16 08:01:32 -08:00
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2014-02-09 14:33:39 -08:00
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if (updatedAddrs ) {
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updatedAddrs.forEach(function(addr, txs){
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txs.forEach(function(addr, t){
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sockets.broadcastAddressTx(addr, t);
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});
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2014-01-16 08:01:32 -08:00
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});
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2014-02-09 14:33:39 -08:00
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}
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2014-01-29 10:10:36 -08:00
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}
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};
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Sync.prototype.storeTxs = function(txs, cb) {
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var self = this;
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2014-02-08 15:09:54 -08:00
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self.txDb.createFromArray(txs, null, function(err, updatedAddrs) {
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if (err) return cb(err);
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2014-01-16 08:01:32 -08:00
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2014-02-08 15:09:54 -08:00
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self._handleBroadcast(null, txs, updatedAddrs);
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2014-01-16 08:01:32 -08:00
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return cb(err);
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});
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};
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return Sync;
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}
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2014-01-07 10:21:59 -08:00
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module.defineClass(spec);
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