639 lines
23 KiB
PHP
Executable File
639 lines
23 KiB
PHP
Executable File
<?php
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/*
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The MIT License (MIT)
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Copyright (c) 2018 AroDev
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www.arionum.com
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
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OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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set_time_limit(0);
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error_reporting(0);
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// make sure it's not accessible in the browser
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if (php_sapi_name() !== 'cli') {
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die("This should only be run as cli");
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}
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// make sure there's only a single sanity process running at the same time
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if (file_exists("tmp/sanity-lock")) {
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$ignore_lock = false;
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if ($argv[1] == "force") {
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$res = intval(shell_exec("ps aux|grep sanity.php|grep -v grep|wc -l"));
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if ($res == 1) {
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$ignore_lock = true;
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}
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}
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$pid_time = filemtime("tmp/sanity-lock");
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// if the process died, restart after 1day
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if (time() - $pid_time > 86400) {
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@unlink("tmp/sanity-lock");
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}
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if (!$ignore_lock) {
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die("Sanity lock in place");
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}
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}
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// set the new sanity lock
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$lock = fopen("tmp/sanity-lock", "w");
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fclose($lock);
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$arg = trim($argv[1]);
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$arg2 = trim($argv[2]);
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echo "Sleeping for 3 seconds\n";
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// sleep for 3 seconds to make sure there's a delay between starting the sanity and other processes
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if ($arg != "microsanity") {
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sleep(3);
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}
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require_once("include/init.inc.php");
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// the sanity can't run without the schema being installed
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if ($_config['dbversion'] < 2) {
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die("DB schema not created");
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@unlink("tmp/sanity-lock");
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exit;
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}
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$block = new Block();
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$acc = new Account();
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$current = $block->current();
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// the microsanity process is an anti-fork measure that will determine the best blockchain to choose for the last block
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$microsanity = false;
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if ($arg == "microsanity" && !empty($arg2)) {
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do {
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// the microsanity runs only against 1 specific peer
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$x = $db->row(
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"SELECT id,hostname FROM peers WHERE reserve=0 AND blacklisted<UNIX_TIMESTAMP() AND ip=:ip",
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[":ip" => $arg2]
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);
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if (!$x) {
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echo "Invalid node - $arg2\n";
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break;
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}
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$url = $x['hostname']."/peer.php?q=";
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$data = peer_post($url."getBlock", ["height" => $current['height']]);
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if (!$data) {
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echo "Invalid getBlock result\n";
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break;
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}
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$data['id'] = san($data['id']);
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$data['height'] = san($data['height']);
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// nothing to be done, same blockchain
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if ($data['id'] == $current['id']) {
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echo "Same block\n";
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break;
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}
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// the blockchain with the most transactions wins the fork (to encourage the miners to include as many transactions as possible) / might backfire on garbage
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if ($current['transactions'] > $data['transactions']) {
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echo "Block has less transactions\n";
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break;
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} elseif ($current['transactions'] == $data['transactions']) {
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// transform the first 12 chars into an integer and choose the blockchain with the biggest value
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$no1 = hexdec(substr(coin2hex($current['id']), 0, 12));
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$no2 = hexdec(substr(coin2hex($data['id']), 0, 12));
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if (gmp_cmp($no1, $no2) != -1) {
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echo "Block hex larger than current\n";
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break;
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}
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}
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// make sure the block is valid
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$prev = $block->get($current['height'] - 1);
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$public = $acc->public_key($data['generator']);
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if (!$block->mine(
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$public,
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$data['nonce'],
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$data['argon'],
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$block->difficulty($current['height'] - 1),
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$prev['id'],
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$prev['height']
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)) {
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echo "Invalid prev-block\n";
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break;
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}
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if (!$block->check($data)) {
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break;
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}
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// delete the last block
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$block->pop(1);
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// add the new block
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echo "Starting to sync last block from $x[hostname]\n";
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$b = $data;
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$res = $block->add(
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$b['height'],
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$b['public_key'],
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$b['nonce'],
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$b['data'],
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$b['date'],
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$b['signature'],
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$b['difficulty'],
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$b['reward_signature'],
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$b['argon']
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);
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if (!$res) {
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_log("Block add: could not add block - $b[id] - $b[height]");
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break;
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}
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_log("Synced block from $host - $b[height] $b[difficulty]");
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} while (0);
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@unlink("tmp/sanity-lock");
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exit;
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}
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$t = time();
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//if($t-$_config['sanity_last']<300) {@unlink("tmp/sanity-lock"); die("The sanity cron was already run recently"); }
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_log("Starting sanity");
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// update the last time sanity ran, to set the execution of the next run
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$db->run("UPDATE config SET val=:time WHERE cfg='sanity_last'", [":time" => $t]);
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$block_peers = [];
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$longest_size = 0;
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$longest = 0;
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$blocks = [];
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$blocks_count = [];
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$most_common = "";
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$most_common_size = 0;
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$total_active_peers = 0;
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// checking peers
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// delete the dead peers
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$db->run("DELETE from peers WHERE fails>100 OR stuckfail>200");
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$r = $db->run("SELECT id,hostname,stuckfail,fails FROM peers WHERE reserve=0 AND blacklisted<UNIX_TIMESTAMP()");
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$total_peers = count($r);
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$peered = [];
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// if we have no peers, get the seed list from the official site
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if ($total_peers == 0 && $_config['testnet'] == false) {
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$i = 0;
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echo "No peers found. Attempting to get peers from arionum.com\n";
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$f = file("https://www.arionum.com/peers.txt");
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shuffle($f);
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// we can't connect to arionum.com
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if (count($f) < 2) {
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@unlink("tmp/sanity-lock");
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die("Could not connect to arionum.com! Will try later!\n");
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}
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foreach ($f as $peer) {
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//peer with all until max_peers, this will ask them to send a peering request to our peer.php where we add their peer to the db.
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$peer = trim(san_host($peer));
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$bad_peers = ["127.0.0.1", "localhost", "10.0.0", "192.168.0"];
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if (str_replace($bad_peers, "", $peer) != $peer) {
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continue;
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}
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$peer = filter_var($peer, FILTER_SANITIZE_URL);
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if (!filter_var($peer, FILTER_VALIDATE_URL)) {
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continue;
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}
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// store the hostname as md5 hash, for easier checking
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$pid = md5($peer);
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// do not peer if we are already peered
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if ($peered[$pid] == 1) {
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continue;
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}
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$peered[$pid] = 1;
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$res = peer_post($peer."/peer.php?q=peer", ["hostname" => $_config['hostname'], "repeer" => 1]);
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if ($res !== false) {
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$i++;
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echo "Peering OK - $peer\n";
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} else {
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echo "Peering FAIL - $peer\n";
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}
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if ($i > $_config['max_peers']) {
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break;
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}
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}
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// count the total peers we have
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$r = $db->run("SELECT id,hostname FROM peers WHERE reserve=0 AND blacklisted<UNIX_TIMESTAMP()");
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$total_peers = count($r);
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if ($total_peers == 0) {
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// something went wrong, could not add any peers -> exit
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@unlink("tmp/sanity-lock");
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die("Could not peer to any peers! Please check internet connectivity!\n");
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}
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}
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// contact all the active peers
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foreach ($r as $x) {
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_log("Contacting peer $x[hostname]");
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$url = $x['hostname']."/peer.php?q=";
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// get their peers list
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$data = peer_post($url."getPeers", [], 5);
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if ($data === false) {
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_log("Peer $x[hostname] unresponsive");
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// if the peer is unresponsive, mark it as failed and blacklist it for a while
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$db->run(
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"UPDATE peers SET fails=fails+1, blacklisted=UNIX_TIMESTAMP()+((fails+1)*3600) WHERE id=:id",
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[":id" => $x['id']]
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);
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continue;
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}
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$i = 0;
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foreach ($data as $peer) {
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// store the hostname as md5 hash, for easier checking
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$peer['hostname'] = san_host($peer['hostname']);
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$peer['ip'] = san_ip($peer['ip']);
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$pid = md5($peer['hostname']);
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// do not peer if we are already peered
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if ($peered[$pid] == 1) {
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continue;
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}
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$peered[$pid] = 1;
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$bad_peers = ["127.0.0.1", "localhost", "10.0.0.", "192.168.0."];
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if (str_replace($bad_peers, "", $peer['hostname']) != $peer['hostname']) {
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continue;
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}
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// if it's our hostname, ignore
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if ($peer['hostname'] == $_config['hostname']) {
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continue;
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}
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// if invalid hostname, ignore
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if (!filter_var($peer['hostname'], FILTER_VALIDATE_URL)) {
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continue;
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}
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// make sure there's no peer in db with this ip or hostname
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if (!$db->single(
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"SELECT COUNT(1) FROM peers WHERE ip=:ip or hostname=:hostname",
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[":ip" => $peer['ip'], ":hostname" => $peer['hostname']]
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)) {
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$i++;
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// check a max_test_peers number of peers from each peer
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if ($i > $_config['max_test_peers']) {
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break;
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}
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$peer['hostname'] = filter_var($peer['hostname'], FILTER_SANITIZE_URL);
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// peer with each one
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_log("Trying to peer with recommended peer: $peer[hostname]");
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$test = peer_post($peer['hostname']."/peer.php?q=peer", ["hostname" => $_config['hostname']], 5);
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if ($test !== false) {
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$total_peers++;
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echo "Peered with: $peer[hostname]\n";
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}
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}
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}
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// get the current block and check it's blockchain
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$data = peer_post($url."currentBlock", [], 5);
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if ($data === false) {
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continue;
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}
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// peer was responsive, mark it as good
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if ($x['fails'] > 0) {
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$db->run("UPDATE peers SET fails=0 WHERE id=:id", [":id" => $x['id']]);
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}
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$data['id'] = san($data['id']);
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$data['height'] = san($data['height']);
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if ($data['height'] < $current['height'] - 500) {
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$db->run(
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"UPDATE peers SET stuckfail=stuckfail+1, blacklisted=UNIX_TIMESTAMP()+7200 WHERE id=:id",
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[":id" => $x['id']]
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);
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continue;
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} else {
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if ($x['stuckfail'] > 0) {
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$db->run("UPDATE peers SET stuckfail=0 WHERE id=:id", [":id" => $x['id']]);
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}
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}
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$total_active_peers++;
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// add the hostname and block relationship to an array
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$block_peers[$data['id']][] = $x['hostname'];
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// count the number of peers with this block id
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$blocks_count[$data['id']]++;
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// keep block data for this block id
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$blocks[$data['id']] = $data;
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// set the most common block on all peers
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if ($blocks_count[$data['id']] > $most_common_size) {
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$most_common = $data['id'];
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$most_common_size = $blocks_count[$data['id']];
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}
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// set the largest height block
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if ($data['height'] > $largest_height) {
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$largest_height = $data['height'];
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$largest_height_block = $data['id'];
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} elseif ($data['height'] == $largest_height && $data['id'] != $largest_height_block) {
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// if there are multiple blocks on the largest height, choose one with the smallest (hardest) difficulty
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if ($data['difficulty'] == $blocks[$largest_height_block]['difficulty']) {
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// if they have the same difficulty, choose if it's most common
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if ($most_common == $data['id']) {
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$largest_height = $data['height'];
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$largest_height_block = $data['id'];
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} else {
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// if this block has more transactions, declare it as winner
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if ($blocks[$largest_height_block]['transactions'] < $data['transactions']) {
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$largest_height = $data['height'];
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$largest_height_block = $data['id'];
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} elseif ($blocks[$largest_height_block]['transactions'] == $data['transactions']) {
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// if the blocks have the same number of transactions, choose the one with the highest derived integer from the first 12 hex characters
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$no1 = hexdec(substr(coin2hex($largest_height_block), 0, 12));
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$no2 = hexdec(substr(coin2hex($data['id']), 0, 12));
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if (gmp_cmp($no1, $no2) == 1) {
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$largest_height = $data['height'];
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$largest_height_block = $data['id'];
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}
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}
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}
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} elseif ($data['difficulty'] < $blocks[$largest_height_block]['difficulty']) {
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// choose smallest (hardest) difficulty
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$largest_height = $data['height'];
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$largest_height_block = $data['id'];
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}
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}
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}
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echo "Most common: $most_common\n";
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echo "Most common block: $most_common_size\n";
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echo "Max height: $largest_height\n";
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echo "Current block: $current[height]\n";
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// if we're not on the largest height
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if ($current['height'] < $largest_height && $largest_height > 1) {
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// start sanity sync / block all other transactions/blocks
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$db->run("UPDATE config SET val=1 WHERE cfg='sanity_sync'");
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sleep(10);
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_log("Longest chain rule triggered - $largest_height - $largest_height_block");
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// choose the peers which have the larget height block
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$peers = $block_peers[$largest_height_block];
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shuffle($peers);
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// sync from them
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foreach ($peers as $host) {
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_log("Starting to sync from $host");
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$url = $host."/peer.php?q=";
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$data = peer_post($url."getBlock", ["height" => $current['height']], 60);
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// invalid data
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if ($data === false) {
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_log("Could not get block from $host - $current[height]");
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continue;
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}
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$data['id'] = san($data['id']);
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$data['height'] = san($data['height']);
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// if we're not on the same blockchain but the blockchain is most common with over 90% of the peers, delete the last 3 blocks and retry
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if ($data['id'] != $current['id'] && $data['id'] == $most_common && ($most_common_size / $total_active_peers) > 0.90) {
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$block->delete($current['height'] - 3);
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$current = $block->current();
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$data = peer_post($url."getBlock", ["height" => $current['height']]);
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if ($data === false) {
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_log("Could not get block from $host - $current[height]");
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break;
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}
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} elseif ($data['id'] != $current['id'] && $data['id'] != $most_common) {
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//if we're not on the same blockchain and also it's not the most common, verify all the blocks on on this blockchain starting at current-10 until current
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$invalid = false;
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$last_good = $current['height'];
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for ($i = $current['height'] - 10; $i < $current['height']; $i++) {
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$data = peer_post($url."getBlock", ["height" => $i]);
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if ($data === false) {
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$invalid = true;
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break;
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}
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$ext = $block->get($i);
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if ($i == $current['height'] - 10 && $ext['id'] != $data['id']) {
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$invalid = true;
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break;
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}
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if ($ext['id'] == $data['id']) {
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$last_good = $i;
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}
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}
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// if last 10 blocks are good, verify all the blocks
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if ($invalid == false) {
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$cblock = [];
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for ($i = $last_good; $i <= $largest_height; $i++) {
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$data = peer_post($url."getBlock", ["height" => $i]);
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if ($data === false) {
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$invalid = true;
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break;
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}
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$cblock[$i] = $data;
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}
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// check if the block mining data is correct
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for ($i = $last_good + 1; $i <= $largest_height; $i++) {
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if (!$block->mine(
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$cblock[$i]['public_key'],
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$cblock[$i]['nonce'],
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$cblock[$i]['argon'],
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$cblock[$i]['difficulty'],
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$cblock[$i - 1]['id'],
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$cblock[$i - 1]['height']
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)) {
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$invalid = true;
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break;
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}
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}
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}
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// if the blockchain proves ok, delete until the last block
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if ($invalid == false) {
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$block->delete($last_good);
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$current = $block->current();
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$data = $current;
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}
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}
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// if current still doesn't match the data, something went wrong
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if ($data['id'] != $current['id']) {
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continue;
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}
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// start syncing all blocks
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while ($current['height'] < $largest_height) {
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$data = peer_post($url."getBlocks", ["height" => $current['height'] + 1]);
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if ($data === false) {
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_log("Could not get blocks from $host - height: $current[height]");
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break;
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}
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$good_peer = true;
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foreach ($data as $b) {
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$b['id'] = san($b['id']);
|
|
$b['height'] = san($b['height']);
|
|
|
|
if (!$block->check($b)) {
|
|
_log("Block check: could not add block - $b[id] - $b[height]");
|
|
$good_peer = false;
|
|
break;
|
|
}
|
|
$res = $block->add(
|
|
$b['height'],
|
|
$b['public_key'],
|
|
$b['nonce'],
|
|
$b['data'],
|
|
$b['date'],
|
|
$b['signature'],
|
|
$b['difficulty'],
|
|
$b['reward_signature'],
|
|
$b['argon']
|
|
);
|
|
if (!$res) {
|
|
_log("Block add: could not add block - $b[id] - $b[height]");
|
|
$good_peer = false;
|
|
break;
|
|
}
|
|
|
|
_log("Synced block from $host - $b[height] $b[difficulty]");
|
|
}
|
|
if (!$good_peer) {
|
|
break;
|
|
}
|
|
$current = $block->current();
|
|
}
|
|
if ($good_peer) {
|
|
break;
|
|
}
|
|
}
|
|
$db->run("UPDATE config SET val=0 WHERE cfg='sanity_sync'", [":time" => $t]);
|
|
}
|
|
|
|
|
|
// deleting mempool transactions older than 14 days
|
|
$db->run("DELETE FROM `mempool` WHERE `date` < UNIX_TIMESTAMP()-(3600*24*14)");
|
|
|
|
|
|
//rebroadcasting local transactions
|
|
if ($_config['sanity_rebroadcast_locals'] == true) {
|
|
$r = $db->run(
|
|
"SELECT id FROM mempool WHERE height>=:current and peer='local' order by `height` asc LIMIT 20",
|
|
[":current" => $current['height']]
|
|
);
|
|
_log("Rebroadcasting local transactions - ".count($r));
|
|
foreach ($r as $x) {
|
|
$x['id'] = san($x['id']);
|
|
system("php propagate.php transaction $x[id] > /dev/null 2>&1 &");
|
|
$db->run(
|
|
"UPDATE mempool SET height=:current WHERE id=:id",
|
|
[":id" => $x['id'], ":current" => $current['height']]
|
|
);
|
|
}
|
|
}
|
|
|
|
//rebroadcasting transactions
|
|
$forgotten = $current['height'] - $_config['sanity_rebroadcast_height'];
|
|
$r = $db->run(
|
|
"SELECT id FROM mempool WHERE height<:forgotten ORDER by val DESC LIMIT 10",
|
|
[":forgotten" => $forgotten]
|
|
);
|
|
|
|
_log("Rebroadcasting external transactions - ".count($r));
|
|
|
|
foreach ($r as $x) {
|
|
$x['id'] = san($x['id']);
|
|
system("php propagate.php transaction $x[id] > /dev/null 2>&1 &");
|
|
$db->run("UPDATE mempool SET height=:current WHERE id=:id", [":id" => $x['id'], ":current" => $current['height']]);
|
|
}
|
|
|
|
|
|
//add new peers if there aren't enough active
|
|
if ($total_peers < $_config['max_peers'] * 0.7) {
|
|
$res = $_config['max_peers'] - $total_peers;
|
|
$db->run("UPDATE peers SET reserve=0 WHERE reserve=1 AND blacklisted<UNIX_TIMESTAMP() LIMIT $res");
|
|
}
|
|
|
|
//random peer check
|
|
$r = $db->run("SELECT * FROM peers WHERE blacklisted<UNIX_TIMESTAMP() and reserve=1 LIMIT ".$_config['max_test_peers']);
|
|
foreach ($r as $x) {
|
|
$url = $x['hostname']."/peer.php?q=";
|
|
$data = peer_post($url."ping", [], 5);
|
|
if ($data === false) {
|
|
$db->run(
|
|
"UPDATE peers SET fails=fails+1, blacklisted=UNIX_TIMESTAMP()+((fails+1)*60) WHERE id=:id",
|
|
[":id" => $x['id']]
|
|
);
|
|
_log("Random reserve peer test $x[hostname] -> FAILED");
|
|
} else {
|
|
_log("Random reserve peer test $x[hostname] -> OK");
|
|
$db->run("UPDATE peers SET fails=0 WHERE id=:id", [":id" => $x['id']]);
|
|
}
|
|
}
|
|
|
|
//clean tmp files
|
|
_log("Cleaning tmp files");
|
|
$f = scandir("tmp/");
|
|
$time = time();
|
|
foreach ($f as $x) {
|
|
if (strlen($x) < 5 && substr($x, 0, 1) == ".") {
|
|
continue;
|
|
}
|
|
$pid_time = filemtime("tmp/$x");
|
|
if ($time - $pid_time > 7200) {
|
|
@unlink("tmp/$x");
|
|
}
|
|
}
|
|
|
|
|
|
//recheck the last blocks
|
|
if ($_config['sanity_recheck_blocks'] > 0) {
|
|
_log("Rechecking blocks");
|
|
$blocks = [];
|
|
$all_blocks_ok = true;
|
|
$start = $current['height'] - $_config['sanity_recheck_blocks'];
|
|
if ($start < 2) {
|
|
$start = 2;
|
|
}
|
|
$r = $db->run("SELECT * FROM blocks WHERE height>=:height ORDER by height ASC", [":height" => $start]);
|
|
foreach ($r as $x) {
|
|
$blocks[$x['height']] = $x;
|
|
$max_height = $x['height'];
|
|
}
|
|
|
|
for ($i = $start + 1; $i <= $max_height; $i++) {
|
|
$data = $blocks[$i];
|
|
|
|
$key = $db->single("SELECT public_key FROM accounts WHERE id=:id", [":id" => $data['generator']]);
|
|
|
|
if (!$block->mine(
|
|
$key,
|
|
$data['nonce'],
|
|
$data['argon'],
|
|
$data['difficulty'],
|
|
$blocks[$i - 1]['id'],
|
|
$blocks[$i - 1]['height']
|
|
)) {
|
|
$db->run("UPDATE config SET val=1 WHERE cfg='sanity_sync'");
|
|
_log("Invalid block detected. Deleting everything after $data[height] - $data[id]");
|
|
sleep(10);
|
|
$all_blocks_ok = false;
|
|
$block->delete($i);
|
|
|
|
$db->run("UPDATE config SET val=0 WHERE cfg='sanity_sync'");
|
|
break;
|
|
}
|
|
}
|
|
if ($all_blocks_ok) {
|
|
echo "All checked blocks are ok\n";
|
|
}
|
|
}
|
|
|
|
_log("Finishing sanity");
|
|
|
|
@unlink("tmp/sanity-lock");
|