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<!DOCTYPE html>
<html>
<head>
<title>blocks.js</title>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<meta name="viewport" content="width=device-width, target-densitydpi=160dpi, initial-scale=1.0; maximum-scale=1.0; user-scalable=0;">
<link rel="stylesheet" media="all" href="arkio.css" />
</head>
<body>
<div id="title">
<h1>blocks.js</h1>
<img src="https://ark.io/wp-content/uploads/2016/10/ark-normal.png">
<hr>
</div>
<div id="container">
<div id="background"></div>
<ul id="jump_to">
<li>
<a class="large" href="javascript:void(0);">Jump To …</a>
<a class="small" href="javascript:void(0);">+</a>
<div id="jump_wrapper">
<div id="jump_page_wrapper">
<div id="jump_page">
<a class="source" href="README.html">
README.md
</a>
<a class="source" href="app.html">
app.js
</a>
<a class="source" href="accounts.html">
accounts.js
</a>
<a class="source" href="blockchain.html">
blockchain.js
</a>
<a class="source" href="blocks.html">
blocks.js
</a>
<a class="source" href="delegates.html">
delegates.js
</a>
<a class="source" href="loader.html">
loader.js
</a>
<a class="source" href="multisignatures.html">
multisignatures.js
</a>
<a class="source" href="nodeManager.html">
nodeManager.js
</a>
<a class="source" href="peers.html">
peers.js
</a>
<a class="source" href="rounds.html">
rounds.js
</a>
<a class="source" href="signatures.html">
signatures.js
</a>
<a class="source" href="system.html">
system.js
</a>
<a class="source" href="transactionPool.html">
transactionPool.js
</a>
<a class="source" href="transactions.html">
transactions.js
</a>
<a class="source" href="transport.html">
transport.js
</a>
</div>
</div>
</li>
</ul>
<ul class="sections">
<li id="section-1">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-1">¶</a>
</div>
</div>
<div class="content"><div class='highlight'><pre><span class="hljs-meta">'use strict'</span>;
<span class="hljs-keyword">var</span> _ = <span class="hljs-built_in">require</span>(<span class="hljs-string">'lodash'</span>);
<span class="hljs-keyword">var</span> <span class="hljs-keyword">async</span> = <span class="hljs-built_in">require</span>(<span class="hljs-string">'async'</span>);
<span class="hljs-keyword">var</span> BlockReward = <span class="hljs-built_in">require</span>(<span class="hljs-string">'../logic/blockReward.js'</span>);
<span class="hljs-keyword">var</span> ByteBuffer = <span class="hljs-built_in">require</span>(<span class="hljs-string">'bytebuffer'</span>);
<span class="hljs-keyword">var</span> constants = <span class="hljs-built_in">require</span>(<span class="hljs-string">'../helpers/constants.js'</span>);
<span class="hljs-keyword">var</span> crypto = <span class="hljs-built_in">require</span>(<span class="hljs-string">'crypto'</span>);
<span class="hljs-keyword">var</span> genesisblock = <span class="hljs-literal">null</span>;
<span class="hljs-keyword">var</span> Inserts = <span class="hljs-built_in">require</span>(<span class="hljs-string">'../helpers/inserts.js'</span>);
<span class="hljs-keyword">var</span> ip = <span class="hljs-built_in">require</span>(<span class="hljs-string">'ip'</span>);
<span class="hljs-keyword">var</span> OrderBy = <span class="hljs-built_in">require</span>(<span class="hljs-string">'../helpers/orderBy.js'</span>);
<span class="hljs-keyword">var</span> Router = <span class="hljs-built_in">require</span>(<span class="hljs-string">'../helpers/router.js'</span>);
<span class="hljs-keyword">var</span> schema = <span class="hljs-built_in">require</span>(<span class="hljs-string">'../schema/blocks.js'</span>);
<span class="hljs-keyword">var</span> slots = <span class="hljs-built_in">require</span>(<span class="hljs-string">'../helpers/slots.js'</span>);
<span class="hljs-keyword">var</span> sql = <span class="hljs-built_in">require</span>(<span class="hljs-string">'../sql/blocks.js'</span>);
<span class="hljs-keyword">var</span> transactionTypes = <span class="hljs-built_in">require</span>(<span class="hljs-string">'../helpers/transactionTypes.js'</span>);</pre></div></div>
</li>
<li id="section-2">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-2">¶</a>
</div>
<p>Private fields</p>
</div>
<div class="content"><div class='highlight'><pre><span class="hljs-keyword">var</span> modules, library, self, __private = {}, shared = {};</pre></div></div>
</li>
<li id="section-3">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-3">¶</a>
</div>
<p>Last time received a block</p>
</div>
<div class="content"><div class='highlight'><pre>__private.lastReceipt = <span class="hljs-literal">null</span>;</pre></div></div>
</li>
<li id="section-4">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-4">¶</a>
</div>
<p>Block reward calculation</p>
</div>
<div class="content"><div class='highlight'><pre>__private.blockReward = <span class="hljs-keyword">new</span> BlockReward();</pre></div></div>
</li>
<li id="section-5">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-5">¶</a>
</div>
<p>Blockchain is loaded from peers</p>
</div>
<div class="content"><div class='highlight'><pre>__private.loaded = <span class="hljs-literal">false</span>;</pre></div></div>
</li>
<li id="section-6">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-6">¶</a>
</div>
<p>Request for shutdown, please clean/stop your job, will shutdown when isActive = false</p>
</div>
<div class="content"><div class='highlight'><pre>__private.cleanup = <span class="hljs-literal">false</span>;</pre></div></div>
</li>
<li id="section-7">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-7">¶</a>
</div>
<p>To prevent from shutdown if true, that would lead to unstable database state</p>
</div>
<div class="content"><div class='highlight'><pre>__private.noShutdownRequired = <span class="hljs-literal">false</span>;</pre></div></div>
</li>
<li id="section-8">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-8">¶</a>
</div>
<p>@formatter:off</p>
</div>
<div class="content"><div class='highlight'><pre>__private.blocksDataFields = {
<span class="hljs-string">'b_id'</span>: <span class="hljs-built_in">String</span>,
<span class="hljs-string">'b_version'</span>: <span class="hljs-built_in">Number</span>,
<span class="hljs-string">'b_timestamp'</span>: <span class="hljs-built_in">Number</span>,
<span class="hljs-string">'b_height'</span>: <span class="hljs-built_in">Number</span>,
<span class="hljs-string">'b_previousBlock'</span>: <span class="hljs-built_in">String</span>,
<span class="hljs-string">'b_numberOfTransactions'</span>: <span class="hljs-built_in">Number</span>,
<span class="hljs-string">'b_totalAmount'</span>: <span class="hljs-built_in">String</span>,
<span class="hljs-string">'b_totalFee'</span>: <span class="hljs-built_in">String</span>,
<span class="hljs-string">'b_reward'</span>: <span class="hljs-built_in">String</span>,
<span class="hljs-string">'b_payloadLength'</span>: <span class="hljs-built_in">Number</span>,
<span class="hljs-string">'b_payloadHash'</span>: <span class="hljs-built_in">String</span>,
<span class="hljs-string">'b_generatorPublicKey'</span>: <span class="hljs-built_in">String</span>,
<span class="hljs-string">'b_blockSignature'</span>: <span class="hljs-built_in">String</span>,
<span class="hljs-string">'t_id'</span>: <span class="hljs-built_in">String</span>,
<span class="hljs-string">'t_type'</span>: <span class="hljs-built_in">Number</span>,
<span class="hljs-string">'t_timestamp'</span>: <span class="hljs-built_in">Number</span>,
<span class="hljs-string">'t_senderPublicKey'</span>: <span class="hljs-built_in">String</span>,
<span class="hljs-string">'t_senderId'</span>: <span class="hljs-built_in">String</span>,
<span class="hljs-string">'t_recipientId'</span>: <span class="hljs-built_in">String</span>,
<span class="hljs-string">'t_vendorField'</span>: <span class="hljs-built_in">String</span>,
<span class="hljs-string">'t_amount'</span>: <span class="hljs-built_in">String</span>,
<span class="hljs-string">'t_fee'</span>: <span class="hljs-built_in">String</span>,
<span class="hljs-string">'t_signature'</span>: <span class="hljs-built_in">String</span>,
<span class="hljs-string">'t_signSignature'</span>: <span class="hljs-built_in">String</span>,
<span class="hljs-string">'s_publicKey'</span>: <span class="hljs-built_in">String</span>,
<span class="hljs-string">'d_username'</span>: <span class="hljs-built_in">String</span>,
<span class="hljs-string">'v_votes'</span>: <span class="hljs-built_in">String</span>,
<span class="hljs-string">'m_min'</span>: <span class="hljs-built_in">Number</span>,
<span class="hljs-string">'m_lifetime'</span>: <span class="hljs-built_in">Number</span>,
<span class="hljs-string">'m_keysgroup'</span>: <span class="hljs-built_in">String</span>,
<span class="hljs-string">'t_requesterPublicKey'</span>: <span class="hljs-built_in">String</span>,
<span class="hljs-string">'t_signatures'</span>: <span class="hljs-built_in">String</span>
};</pre></div></div>
</li>
<li id="section-9">
<div class="fullblock">
<div class="pilwrap ">
<a class="pilcrow" href="#section-9">¶</a>
</div>
<p>@formatter:on</p>
</div>
</li>
<li id="section-10">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-10">¶</a>
</div>
<p>Constructor</p>
</div>
<div class="content"><div class='highlight'><pre><span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">Blocks</span> (<span class="hljs-params">cb, scope</span>) </span>{
library = scope;
genesisblock = library.genesisblock;
self = <span class="hljs-keyword">this</span>;
__private.saveGenesisBlock(<span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">err</span>) </span>{
<span class="hljs-keyword">return</span> cb(err, self);
});
}</pre></div></div>
</li>
<li id="section-11">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-11">¶</a>
</div>
<p>Private methods</p>
</div>
<div class="content"><div class='highlight'><pre>__private.attachApi = <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params"></span>) </span>{
<span class="hljs-keyword">var</span> router = <span class="hljs-keyword">new</span> Router();
router.use(<span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">req, res, next</span>) </span>{
<span class="hljs-keyword">if</span> (modules) { <span class="hljs-keyword">return</span> next(); }
res.status(<span class="hljs-number">500</span>).send({<span class="hljs-attr">success</span>: <span class="hljs-literal">false</span>, <span class="hljs-attr">error</span>: <span class="hljs-string">'Blockchain is loading'</span>});
});
router.map(shared, {
<span class="hljs-string">'get /get'</span>: <span class="hljs-string">'getBlock'</span>,
<span class="hljs-string">'get /'</span>: <span class="hljs-string">'getBlocks'</span>,
<span class="hljs-string">'get /getEpoch'</span>: <span class="hljs-string">'getEpoch'</span>,
<span class="hljs-string">'get /getHeight'</span>: <span class="hljs-string">'getHeight'</span>,
<span class="hljs-string">'get /getNethash'</span>: <span class="hljs-string">'getNethash'</span>,
<span class="hljs-string">'get /getFee'</span>: <span class="hljs-string">'getFee'</span>,
<span class="hljs-string">'get /getFees'</span>: <span class="hljs-string">'getFees'</span>,
<span class="hljs-string">'get /getMilestone'</span>: <span class="hljs-string">'getMilestone'</span>,
<span class="hljs-string">'get /getReward'</span>: <span class="hljs-string">'getReward'</span>,
<span class="hljs-string">'get /getSupply'</span>: <span class="hljs-string">'getSupply'</span>,
<span class="hljs-string">'get /getStatus'</span>: <span class="hljs-string">'getStatus'</span>
});
router.use(<span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">req, res, next</span>) </span>{
res.status(<span class="hljs-number">500</span>).send({<span class="hljs-attr">success</span>: <span class="hljs-literal">false</span>, <span class="hljs-attr">error</span>: <span class="hljs-string">'API endpoint not found'</span>});
});
library.network.app.use(<span class="hljs-string">'/api/blocks'</span>, router);
library.network.app.use(<span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">err, req, res, next</span>) </span>{
<span class="hljs-keyword">if</span> (!err) { <span class="hljs-keyword">return</span> next(); }
library.logger.error(<span class="hljs-string">'API error '</span> + req.url, err);
res.status(<span class="hljs-number">500</span>).send({<span class="hljs-attr">success</span>: <span class="hljs-literal">false</span>, <span class="hljs-attr">error</span>: <span class="hljs-string">'API error: '</span> + err.message});
});
};
__private.saveGenesisBlock = <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">cb</span>) </span>{
library.db.query(sql.getGenesisBlockId, { <span class="hljs-attr">id</span>: genesisblock.block.id }).then(<span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">rows</span>) </span>{
<span class="hljs-keyword">var</span> blockId = rows.length && rows[<span class="hljs-number">0</span>].id;
<span class="hljs-keyword">if</span> (!blockId) {
__private.saveBlock(genesisblock.block, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">err</span>) </span>{
<span class="hljs-keyword">return</span> cb(err);
});
} <span class="hljs-keyword">else</span> {
<span class="hljs-keyword">return</span> cb();
}
}).catch(<span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">err</span>) </span>{
library.logger.error(<span class="hljs-string">"stack"</span>, err.stack);
<span class="hljs-keyword">return</span> cb(<span class="hljs-string">'Blocks#saveGenesisBlock error'</span>);
});
};
__private.deleteBlock = <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">blockId, cb</span>) </span>{
library.db.none(sql.deleteBlock, {<span class="hljs-attr">id</span>: blockId}).then(<span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params"></span>) </span>{
<span class="hljs-keyword">return</span> cb();
}).catch(<span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">err</span>) </span>{
library.logger.error(<span class="hljs-string">"stack"</span>, err.stack);
<span class="hljs-keyword">return</span> cb(<span class="hljs-string">'Blocks#deleteBlock error'</span>);
});
};
__private.list = <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">filter, cb</span>) </span>{
<span class="hljs-keyword">var</span> params = {}, where = [];
<span class="hljs-keyword">if</span> (filter.generatorPublicKey) {
where.push(<span class="hljs-string">'"b_generatorPublicKey"::bytea = ${generatorPublicKey}'</span>);
params.generatorPublicKey = filter.generatorPublicKey;
}
<span class="hljs-keyword">if</span> (filter.numberOfTransactions) {
where.push(<span class="hljs-string">'"b_numberOfTransactions" = ${numberOfTransactions}'</span>);
params.numberOfTransactions = filter.numberOfTransactions;
}
<span class="hljs-keyword">if</span> (filter.previousBlock) {
where.push(<span class="hljs-string">'"b_previousBlock" = ${previousBlock}'</span>);
params.previousBlock = filter.previousBlock;
}
<span class="hljs-keyword">if</span> (filter.height === <span class="hljs-number">0</span> || filter.height > <span class="hljs-number">0</span>) {
where.push(<span class="hljs-string">'"b_height" = ${height}'</span>);
params.height = filter.height;
}
<span class="hljs-keyword">if</span> (filter.totalAmount >= <span class="hljs-number">0</span>) {
where.push(<span class="hljs-string">'"b_totalAmount" = ${totalAmount}'</span>);
params.totalAmount = filter.totalAmount;
}
<span class="hljs-keyword">if</span> (filter.totalFee >= <span class="hljs-number">0</span>) {
where.push(<span class="hljs-string">'"b_totalFee" = ${totalFee}'</span>);
params.totalFee = filter.totalFee;
}
<span class="hljs-keyword">if</span> (filter.reward >= <span class="hljs-number">0</span>) {
where.push(<span class="hljs-string">'"b_reward" = ${reward}'</span>);
params.reward = filter.reward;
}
<span class="hljs-keyword">if</span> (!filter.limit) {
params.limit = <span class="hljs-number">100</span>;
} <span class="hljs-keyword">else</span> {
params.limit = <span class="hljs-built_in">Math</span>.abs(filter.limit);
}
<span class="hljs-keyword">if</span> (!filter.offset) {
params.offset = <span class="hljs-number">0</span>;
} <span class="hljs-keyword">else</span> {
params.offset = <span class="hljs-built_in">Math</span>.abs(filter.offset);
}
<span class="hljs-keyword">if</span> (params.limit > <span class="hljs-number">100</span>) {
<span class="hljs-keyword">return</span> cb(<span class="hljs-string">'Invalid limit. Maximum is 100'</span>);
}
<span class="hljs-keyword">var</span> orderBy = OrderBy(
(filter.orderBy || <span class="hljs-string">'height:desc'</span>), {
<span class="hljs-attr">sortFields</span>: sql.sortFields,
<span class="hljs-attr">fieldPrefix</span>: <span class="hljs-string">'b_'</span>
}
);
<span class="hljs-keyword">if</span> (orderBy.error) {
<span class="hljs-keyword">return</span> cb(orderBy.error);
}
library.db.query(sql.countList({
<span class="hljs-attr">where</span>: where
}), params).then(<span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">rows</span>) </span>{
<span class="hljs-keyword">var</span> count = rows[<span class="hljs-number">0</span>].count;
library.db.query(sql.list({
<span class="hljs-attr">where</span>: where,
<span class="hljs-attr">sortField</span>: orderBy.sortField,
<span class="hljs-attr">sortMethod</span>: orderBy.sortMethod
}), params).then(<span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">rows</span>) </span>{
<span class="hljs-keyword">var</span> blocks = [];
<span class="hljs-keyword">for</span> (<span class="hljs-keyword">var</span> i = <span class="hljs-number">0</span>; i < rows.length; i++) {
blocks.push(library.logic.block.dbRead(rows[i]));
}
<span class="hljs-keyword">var</span> data = {
<span class="hljs-attr">blocks</span>: blocks,
<span class="hljs-attr">count</span>: count
};
<span class="hljs-keyword">return</span> cb(<span class="hljs-literal">null</span>, data);
}).catch(<span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">err</span>) </span>{
library.logger.error(<span class="hljs-string">"stack"</span>, err.stack);
<span class="hljs-keyword">return</span> cb(<span class="hljs-string">'Blocks#list error'</span>);
});
}).catch(<span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">err</span>) </span>{
library.logger.error(<span class="hljs-string">"stack"</span>, err.stack);
<span class="hljs-keyword">return</span> cb(<span class="hljs-string">'Blocks#list error'</span>);
});
};
__private.getById = <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">id, cb</span>) </span>{
library.db.query(sql.getById, {<span class="hljs-attr">id</span>: id}).then(<span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">rows</span>) </span>{
<span class="hljs-keyword">if</span> (!rows.length) {
<span class="hljs-keyword">return</span> cb(<span class="hljs-string">'Block not found'</span>);
}
<span class="hljs-keyword">var</span> block = library.logic.block.dbRead(rows[<span class="hljs-number">0</span>]);
<span class="hljs-keyword">return</span> cb(<span class="hljs-literal">null</span>, block);
}).catch(<span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">err</span>) </span>{
library.logger.error(<span class="hljs-string">"stack"</span>, err.stack);
<span class="hljs-keyword">return</span> cb(<span class="hljs-string">'Blocks#getById error'</span>);
});
};
__private.saveBlock = <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">block, cb</span>) </span>{
library.db.tx(<span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">t</span>) </span>{
<span class="hljs-keyword">var</span> promise = library.logic.block.dbSave(block);
<span class="hljs-keyword">var</span> inserts = <span class="hljs-keyword">new</span> Inserts(promise, promise.values);
<span class="hljs-keyword">var</span> promises = [
t.none(inserts.template(), promise.values)
];
t = __private.promiseTransactions(t, block, promises);
t.batch(promises);
}).then(<span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params"></span>) </span>{
<span class="hljs-keyword">return</span> __private.afterSave(block, cb);
}).catch(<span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">err</span>) </span>{
library.logger.error(<span class="hljs-string">"stack"</span>, err.stack);
<span class="hljs-keyword">return</span> cb(<span class="hljs-string">'Blocks#saveBlock error'</span>);
});
};
__private.promiseTransactions = <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">t, block, blockPromises</span>) </span>{
<span class="hljs-keyword">if</span> (_.isEmpty(block.transactions)) {
<span class="hljs-keyword">return</span> t;
}
<span class="hljs-keyword">var</span> transactionIterator = <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">transaction</span>) </span>{
transaction.blockId = block.id;
<span class="hljs-keyword">return</span> library.logic.transaction.dbSave(transaction);
};
<span class="hljs-keyword">var</span> promiseGrouper = <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">promise</span>) </span>{
<span class="hljs-keyword">if</span> (promise && promise.table) {
<span class="hljs-keyword">return</span> promise.table;
} <span class="hljs-keyword">else</span> {
<span class="hljs-keyword">throw</span> <span class="hljs-string">'Invalid promise'</span>;
}
};
<span class="hljs-keyword">var</span> typeIterator = <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">type</span>) </span>{
<span class="hljs-keyword">var</span> values = [];
_.each(type, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">promise</span>) </span>{
<span class="hljs-keyword">if</span> (promise && promise.values) {
values = values.concat(promise.values);
} <span class="hljs-keyword">else</span> {
<span class="hljs-keyword">throw</span> <span class="hljs-string">'Invalid promise'</span>;
}
});
<span class="hljs-keyword">var</span> inserts = <span class="hljs-keyword">new</span> Inserts(type[<span class="hljs-number">0</span>], values, <span class="hljs-literal">true</span>);
t.none(inserts.template(), inserts);
};
<span class="hljs-keyword">var</span> promises = _.flatMap(block.transactions, transactionIterator);
_.each(_.groupBy(promises, promiseGrouper), typeIterator);
<span class="hljs-keyword">return</span> t;
};
__private.afterSave = <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">block, cb</span>) </span>{
<span class="hljs-keyword">async</span>.eachSeries(block.transactions, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">transaction, cb</span>) </span>{
<span class="hljs-keyword">return</span> library.logic.transaction.afterSave(transaction, cb);
}, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">err</span>) </span>{
<span class="hljs-keyword">return</span> cb(err);
});
};
__private.getPreviousBlock = <span class="hljs-function"><span class="hljs-keyword">function</span>(<span class="hljs-params">block, cb</span>)</span>{
<span class="hljs-keyword">var</span> previousBlock = modules.blockchain.getPreviousBlock(block);
<span class="hljs-keyword">if</span>(previousBlock){
cb(<span class="hljs-literal">null</span>, previousBlock);
}
<span class="hljs-keyword">else</span> { <span class="hljs-comment">//let's get from database</span>
library.db.query(sql.getBlockById, {
<span class="hljs-attr">id</span>: block.previousBlock
}).then(<span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">rows</span>) </span>{
previousBlock = rows[<span class="hljs-number">0</span>];</pre></div></div>
</li>
<li id="section-12">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-12">¶</a>
</div>
<p>TODO: get this right without this cleaning</p>
</div>
<div class="content"><div class='highlight'><pre> previousBlock.reward = <span class="hljs-built_in">parseInt</span>(previousBlock.reward);
previousBlock.totalAmount = <span class="hljs-built_in">parseInt</span>(previousBlock.totalAmount);
previousBlock.totalFee = <span class="hljs-built_in">parseInt</span>(previousBlock.totalFee);</pre></div></div>
</li>
<li id="section-13">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-13">¶</a>
</div>
<p>we add this previous block in the mem blockchain</p>
</div>
<div class="content"><div class='highlight'><pre> modules.blockchain.upsertBlock(previousBlock);
cb(<span class="hljs-literal">null</span>, previousBlock);
}).catch(<span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">err</span>) </span>{
cb(err);
});
}
}
__private.popLastBlock = <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">oldLastBlock, cb</span>) </span>{
library.blockSequence.add(<span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">cb</span>) </span>{
<span class="hljs-keyword">if</span>(!oldLastBlock.previousBlock){
self.simpleDeleteAfterBlock(oldLastBlock.id, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">err</span>) </span>{
library.logger.warn(<span class="hljs-string">"removing block"</span>, oldLastBlock.height);
modules.blockchain.removeBlock(oldLastBlock);
});
<span class="hljs-keyword">return</span> cb(<span class="hljs-string">"No previous block"</span>);
}
__private.getPreviousBlock(oldLastBlock, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">err, previousBlock</span>) </span>{
<span class="hljs-keyword">if</span> (err) {
<span class="hljs-keyword">return</span> cb(err);
}
<span class="hljs-keyword">if</span> (!previousBlock) {</pre></div></div>
</li>
<li id="section-14">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-14">¶</a>
</div>
<p>very wrong removing block from db only</p>
</div>
<div class="content"><div class='highlight'><pre> self.simpleDeleteAfterBlock(oldLastBlock.id, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">err</span>) </span>{
library.logger.warn(<span class="hljs-string">"removing block"</span>, oldLastBlock.height);
modules.blockchain.removeBlock(oldLastBlock);
});
<span class="hljs-keyword">return</span> cb(<span class="hljs-string">"No previous block"</span>);
}
<span class="hljs-keyword">async</span>.eachSeries(oldLastBlock.transactions.reverse(), <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">transaction, cb</span>) </span>{
<span class="hljs-keyword">async</span>.series([
<span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">cb</span>) </span>{
modules.transactions.undo(transaction, oldLastBlock, cb);
}, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">cb</span>) </span>{
modules.transactions.undoUnconfirmed(transaction, cb);
}
], cb);
}, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">err</span>) </span>{</pre></div></div>
</li>
<li id="section-15">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-15">¶</a>
</div>
<p>TODO: reinject transaction into pool: better than this
library.bus.message(“receiveTransactions”)</p>
</div>
<div class="content"><div class='highlight'><pre> modules.rounds.backwardTick(oldLastBlock, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params"></span>) </span>{
__private.deleteBlock(oldLastBlock.id, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">err</span>) </span>{
library.logger.warn(<span class="hljs-string">"removing block"</span>, oldLastBlock.height);
modules.blockchain.removeBlock(oldLastBlock, cb);
});
});
});
});
}, cb);
};
__private.getIdSequence = <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">height, cb</span>) </span>{
library.db.query(sql.getIdSequence, { <span class="hljs-attr">height</span>: height, <span class="hljs-attr">limit</span>: <span class="hljs-number">10</span>, <span class="hljs-attr">delegates</span>: slots.delegates, <span class="hljs-attr">activeDelegates</span>: constants.activeDelegates }).then(<span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">rows</span>) </span>{
<span class="hljs-keyword">if</span> (rows.length === <span class="hljs-number">0</span>) {
<span class="hljs-keyword">return</span> cb(<span class="hljs-string">'Failed to get id sequence for height: '</span> + height);
}
<span class="hljs-keyword">var</span> ids = [];
<span class="hljs-keyword">if</span> (genesisblock && genesisblock.block) {
<span class="hljs-keyword">var</span> __genesisblock = {
<span class="hljs-attr">id</span>: genesisblock.block.id,
<span class="hljs-attr">height</span>: genesisblock.block.height
};
<span class="hljs-keyword">if</span> (!_.includes(rows, __genesisblock.id)) {
rows.push(__genesisblock);
}
}</pre></div></div>
</li>
<li id="section-16">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-16">¶</a>
</div>
<p>multithread will eat you</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="hljs-keyword">var</span> lastBlock = modules.blockchain.getLastBlock();
<span class="hljs-keyword">if</span> (lastBlock && !_.includes(rows, lastBlock.id)) {
rows.unshift({
<span class="hljs-attr">id</span>: lastBlock.id,
<span class="hljs-attr">height</span>: lastBlock.height
});
}
rows.forEach(<span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">row</span>) </span>{
<span class="hljs-keyword">if</span> (!_.includes(ids, row.id)) {
ids.push(row.id);
}
});
<span class="hljs-keyword">return</span> cb(<span class="hljs-literal">null</span>, { <span class="hljs-attr">firstHeight</span>: rows[<span class="hljs-number">0</span>].height, <span class="hljs-attr">ids</span>: ids.join(<span class="hljs-string">','</span>) });
}).catch(<span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">err</span>) </span>{
library.logger.error(<span class="hljs-string">"stack"</span>, err.stack);
<span class="hljs-keyword">return</span> cb(<span class="hljs-string">'Blocks#getIdSequence error'</span>);
});
};
__private.readDbRows = <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">rows</span>) </span>{
<span class="hljs-keyword">var</span> blocks = {};
<span class="hljs-keyword">var</span> order = [];
<span class="hljs-keyword">for</span> (<span class="hljs-keyword">var</span> i = <span class="hljs-number">0</span>, length = rows.length; i < length; i++) {
<span class="hljs-keyword">var</span> block = library.logic.block.dbRead(rows[i]);
<span class="hljs-keyword">if</span> (block) {
<span class="hljs-keyword">if</span> (!blocks[block.id]) {
<span class="hljs-keyword">if</span> (block.id === genesisblock.block.id) {
block.generationSignature = (<span class="hljs-keyword">new</span> <span class="hljs-built_in">Array</span>(<span class="hljs-number">65</span>)).join(<span class="hljs-string">'0'</span>);
}
order.push(block.id);
blocks[block.id] = block;
}
<span class="hljs-keyword">var</span> transaction = library.logic.transaction.dbRead(rows[i]);
blocks[block.id].transactions = blocks[block.id].transactions || [];
<span class="hljs-keyword">if</span> (transaction) {
<span class="hljs-keyword">if</span> (!blocks[block.id].transactions[transaction.id]) {
blocks[block.id].transactions[transaction.id] = transaction;
}
}
}
}
blocks = order.map(<span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">v</span>) </span>{
blocks[v].transactions = <span class="hljs-built_in">Object</span>.keys(blocks[v].transactions).map(<span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">t</span>) </span>{
<span class="hljs-keyword">return</span> blocks[v].transactions[t];
});
<span class="hljs-keyword">return</span> blocks[v];
});
<span class="hljs-keyword">return</span> blocks;
};
__private.applyGenesisTransaction = <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">block, transaction, sender, cb</span>) </span>{
transaction.blockId=block.id;
modules.transactions.applyUnconfirmed(transaction, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">err</span>) </span>{
<span class="hljs-keyword">if</span> (err) {
<span class="hljs-keyword">return</span> cb({
<span class="hljs-attr">message</span>: err,
<span class="hljs-attr">transaction</span>: transaction,
<span class="hljs-attr">block</span>: block
});
}
modules.transactions.apply(transaction, block, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">err</span>) </span>{
<span class="hljs-keyword">if</span> (err) {
<span class="hljs-keyword">return</span> cb({
<span class="hljs-attr">message</span>: <span class="hljs-string">'Failed to apply transaction: '</span> + transaction.id,
<span class="hljs-attr">transaction</span>: transaction,
<span class="hljs-attr">block</span>: block
});
}
<span class="hljs-keyword">return</span> cb();
});
});
};</pre></div></div>
</li>
<li id="section-17">
<div class="fullblock">
<div class="pilwrap ">
<a class="pilcrow" href="#section-17">¶</a>
</div>
<p>Public methods</p>
<p><strong>API</strong> <code>lastReceipt</code></p>
</div>
</li>
<li id="section-18">
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<div class="pilwrap ">
<a class="pilcrow" href="#section-18">¶</a>
</div>
</div>
<div class="content"><div class='highlight'><pre>Blocks.prototype.lastReceipt = <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">lastReceipt</span>) </span>{
<span class="hljs-keyword">if</span>(lastReceipt){
__private.lastReceipt = lastReceipt;
}
<span class="hljs-keyword">if</span> (!__private.lastReceipt) {
__private.lastReceipt = <span class="hljs-keyword">new</span> <span class="hljs-built_in">Date</span>();
__private.lastReceipt.stale = <span class="hljs-literal">true</span>;
__private.lastReceipt.rebuild = <span class="hljs-literal">false</span>;
__private.lastReceipt.secondsAgo = <span class="hljs-number">100000</span>;
}
<span class="hljs-keyword">else</span> {
<span class="hljs-keyword">var</span> timeNow = <span class="hljs-keyword">new</span> <span class="hljs-built_in">Date</span>().getTime();
__private.lastReceipt.secondsAgo = <span class="hljs-built_in">Math</span>.floor((timeNow - __private.lastReceipt.getTime()) / <span class="hljs-number">1000</span>);
<span class="hljs-keyword">if</span>(modules.delegates.isActiveDelegate()){
__private.lastReceipt.stale = __private.lastReceipt.secondsAgo > <span class="hljs-number">8</span>;
__private.lastReceipt.rebuild = __private.lastReceipt.secondsAgo > <span class="hljs-number">60</span>;
}
<span class="hljs-keyword">else</span> <span class="hljs-keyword">if</span>(modules.delegates.isForging()){
__private.lastReceipt.stale = __private.lastReceipt.secondsAgo > <span class="hljs-number">30</span>;
__private.lastReceipt.rebuild = __private.lastReceipt.secondsAgo > <span class="hljs-number">100</span>;
}
<span class="hljs-keyword">else</span> {
__private.lastReceipt.stale = __private.lastReceipt.secondsAgo > <span class="hljs-number">60</span>;
__private.lastReceipt.rebuild = __private.lastReceipt.secondsAgo > <span class="hljs-number">200</span>;
}
}
<span class="hljs-keyword">return</span> __private.lastReceipt;
};</pre></div></div>
</li>
<li id="section-19">
<div class="fullblock">
<div class="pilwrap ">
<a class="pilcrow" href="#section-19">¶</a>
</div>
<p><strong>API</strong> <code>getTransactionsFromIds</code></p>
</div>
</li>
<li id="section-20">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-20">¶</a>
</div>
</div>
<div class="content"><div class='highlight'><pre>Blocks.prototype.getTransactionsFromIds = <span class="hljs-function"><span class="hljs-keyword">function</span>(<span class="hljs-params">blockid, ids, cb</span>)</span>{
__private.getById(blockid, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">err, block</span>) </span>{
<span class="hljs-keyword">if</span> (!block || err) {
<span class="hljs-keyword">return</span> cb(<span class="hljs-string">'Block not found'</span>);
}
<span class="hljs-keyword">var</span> transactions=[];
<span class="hljs-keyword">for</span>(<span class="hljs-keyword">var</span> i=<span class="hljs-number">0</span>;i<block.transactions.length;i++){
<span class="hljs-keyword">if</span>(block.transactions[i].id <span class="hljs-keyword">in</span> ids){
transactions.push[block.transactions[i]];
}
}
<span class="hljs-keyword">return</span> cb(<span class="hljs-literal">null</span>, transactions);
});
}</pre></div></div>
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<li id="section-21">
<div class="fullblock">
<div class="pilwrap ">
<a class="pilcrow" href="#section-21">¶</a>
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<p><strong>API</strong> <code>getCommonBlock</code></p>
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</li>
<li id="section-22">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-22">¶</a>
</div>
</div>
<div class="content"><div class='highlight'><pre>Blocks.prototype.getCommonBlock = <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">peer, height, cb</span>) </span>{
<span class="hljs-keyword">async</span>.waterfall([
<span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">waterCb</span>) </span>{
__private.getIdSequence(height, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">err, res</span>) </span>{
<span class="hljs-keyword">return</span> waterCb(err, res);
});
},
<span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">res, waterCb</span>) </span>{
<span class="hljs-keyword">var</span> ids = res.ids;
modules.transport.getFromPeer(peer, {
<span class="hljs-attr">api</span>: <span class="hljs-string">'/blocks/common?ids='</span> + ids,
<span class="hljs-attr">method</span>: <span class="hljs-string">'GET'</span>
}, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">err, res</span>) </span>{
<span class="hljs-keyword">if</span> (err || res.body.error) {
<span class="hljs-keyword">return</span> waterCb(err || res.body.error.toString());
} <span class="hljs-keyword">else</span> <span class="hljs-keyword">if</span> (!res.body.common) {
<span class="hljs-keyword">return</span> waterCb([<span class="hljs-string">'Chain comparison failed with peer:'</span>, peer.string, <span class="hljs-string">'using ids:'</span>, ids].join(<span class="hljs-string">' '</span>));
} <span class="hljs-keyword">else</span> {
<span class="hljs-keyword">return</span> waterCb(<span class="hljs-literal">null</span>, res);
}
});
},
<span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">res, waterCb</span>) </span>{
library.db.query(sql.getCommonBlock(res.body.common.previousBlock), {
<span class="hljs-attr">id</span>: res.body.common.id,
<span class="hljs-attr">previousBlock</span>: res.body.common.previousBlock,