1007 lines
34 KiB
PHP
Executable File
1007 lines
34 KiB
PHP
Executable File
<?php
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class Block
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{
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public function add($height, $public_key, $nonce, $data, $date, $signature, $difficulty, $reward_signature, $argon, $bootstrapping=false)
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{
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global $db;
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$acc = new Account();
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$trx = new Transaction();
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$generator = $acc->get_address($public_key);
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// the transactions are always sorted in the same way, on all nodes, as they are hashed as json
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ksort($data);
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// create the hash / block id
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$hash = $this->hash($generator, $height, $date, $nonce, $data, $signature, $difficulty, $argon);
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//fix for the broken base58 library used until block 16900, trimming the first 0 bytes.
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if ($height < 16900) {
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$hash = ltrim($hash, '1');
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}
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$json = json_encode($data);
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// create the block data and check it against the signature
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$info = "{$generator}-{$height}-{$date}-{$nonce}-{$json}-{$difficulty}-{$argon}";
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// _log($info,3);
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if (!$bootstrapping) {
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if (!$acc->check_signature($info, $signature, $public_key)) {
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_log("Block signature check failed");
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return false;
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}
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if (!$this->parse_block($hash, $height, $data, true)) {
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_log("Parse block failed");
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return false;
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}
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}
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// lock table to avoid race conditions on blocks
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$db->exec("LOCK TABLES blocks WRITE, accounts WRITE, transactions WRITE, mempool WRITE, masternode WRITE, peers write, config WRITE");
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$reward = $this->reward($height, $data);
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$msg = '';
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if($height>=80458){
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//reward the masternode
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$mn_winner=$db->single(
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"SELECT public_key FROM masternode WHERE status=1 AND blacklist<:current AND height<:start ORDER by last_won ASC, public_key ASC LIMIT 1",
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[":current"=>$height, ":start"=>$height-360]
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);
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_log("MN Winner: $mn_winner",2);
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if($mn_winner!==false){
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$mn_reward=round(0.33*$reward,8);
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$reward=round($reward-$mn_reward,8);
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$reward=number_format($reward,8,".","");
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$mn_reward=number_format($mn_reward,8,".","");
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_log("MN Reward: $mn_reward",2);
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}
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}
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// the reward transaction
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$transaction = [
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"src" => $generator,
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"dst" => $generator,
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"val" => $reward,
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"version" => 0,
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"date" => $date,
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"message" => $msg,
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"fee" => "0.00000000",
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"public_key" => $public_key,
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];
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$transaction['signature'] = $reward_signature;
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// hash the transaction
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$transaction['id'] = $trx->hash($transaction);
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if (!$bootstrapping) {
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// check the signature
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$info = $transaction['val']."-".$transaction['fee']."-".$transaction['dst']."-".$transaction['message']."-".$transaction['version']."-".$transaction['public_key']."-".$transaction['date'];
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if (!$acc->check_signature($info, $reward_signature, $public_key)) {
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_log("Reward signature failed");
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return false;
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}
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}
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// insert the block into the db
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$db->beginTransaction();
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$total = count($data);
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$bind = [
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":id" => $hash,
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":generator" => $generator,
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":signature" => $signature,
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":height" => $height,
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":date" => $date,
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":nonce" => $nonce,
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":difficulty" => $difficulty,
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":argon" => $argon,
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":transactions" => $total,
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];
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$res = $db->run(
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"INSERT into blocks SET id=:id, generator=:generator, height=:height,`date`=:date,nonce=:nonce, signature=:signature, difficulty=:difficulty, argon=:argon, transactions=:transactions",
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$bind
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);
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if ($res != 1) {
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// rollback and exit if it fails
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_log("Block DB insert failed");
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$db->rollback();
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$db->exec("UNLOCK TABLES");
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return false;
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}
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// insert the reward transaction in the db
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$trx->add($hash, $height, $transaction);
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if($mn_winner!==false&&$height>=80458&&$mn_reward>0){
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$db->run("UPDATE accounts SET balance=balance+:bal WHERE public_key=:pub",[":pub"=>$mn_winner, ":bal"=>$mn_reward]);
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$bind = [
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":id" => hex2coin(hash("sha512", "mn".$hash.$height.$mn_winner)),
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":public_key" => $public_key,
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":height" => $height,
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":block" => $hash,
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":dst" => $acc->get_address($mn_winner),
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":val" => $mn_reward,
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":fee" => 0,
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":signature" => $reward_signature,
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":version" => 0,
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":date" => $date,
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":message" => 'masternode',
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];
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$res = $db->run(
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"INSERT into transactions SET id=:id, public_key=:public_key, block=:block, height=:height, dst=:dst, val=:val, fee=:fee, signature=:signature, version=:version, message=:message, `date`=:date",
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$bind
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);
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$this->reset_fails_masternodes($mn_winner, $height, $hash);
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}
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// parse the block's transactions and insert them to db
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$res = $this->parse_block($hash, $height, $data, false, $bootstrapping);
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if (($height-1)%3==2 && $height>=80000&&$height<80458) {
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$this->blacklist_masternodes();
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$this->reset_fails_masternodes($public_key, $height, $hash);
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}
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// if any fails, rollback
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if ($res == false) {
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$db->rollback();
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} else {
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$db->commit();
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}
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// relese the locking as everything is finished
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$db->exec("UNLOCK TABLES");
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return true;
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}
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// resets the number of fails when winning a block and marks it with a transaction
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public function reset_fails_masternodes($public_key, $height, $hash)
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{
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global $db;
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$res=$this->masternode_log($public_key, $height, $hash);
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if ($res) {
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$db->run("UPDATE masternode SET last_won=:last_won,fails=0 WHERE public_key=:public_key", [":public_key"=>$public_key, ":last_won"=>$height]);
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}
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}
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//logs the current masternode status
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public function masternode_log($public_key, $height, $hash)
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{
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global $db;
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$mn=$db->row("SELECT blacklist,last_won,fails FROM masternode WHERE public_key=:public_key", [":public_key"=>$public_key]);
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if (!$mn) {
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return false;
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}
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$id = hex2coin(hash("sha512", "resetfails-$hash-$height-$public_key"));
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$msg="$mn[blacklist],$mn[last_won],$mn[fails]";
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$db->run(
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"INSERT into transactions SET id=:id, block=:block, height=:height, dst=:dst, val=0, fee=0, signature=:sig, version=111, message=:msg, date=:date, public_key=:public_key",
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[":id"=>$id, ":block"=>$hash, ":height"=>$height, ":dst"=>$hash, ":sig"=>$hash, ":msg"=>$msg, ":date"=>time(), ":public_key"=>$public_key]
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);
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return true;
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}
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// returns the current block, without the transactions
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public function current()
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{
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global $db;
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$current = $db->row("SELECT * FROM blocks ORDER by height DESC LIMIT 1");
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if (!$current) {
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$this->genesis();
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return $this->current(true);
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}
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return $current;
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}
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// returns the previous block
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public function prev()
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{
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global $db;
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$current = $db->row("SELECT * FROM blocks ORDER by height DESC LIMIT 1,1");
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return $current;
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}
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// calculates the difficulty / base target for a specific block. The higher the difficulty number, the easier it is to win a block.
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public function difficulty($height = 0)
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{
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global $db;
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// if no block height is specified, use the current block.
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if ($height == 0) {
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$current = $this->current();
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} else {
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$current = $this->get($height);
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}
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$height = $current['height'];
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if ($height == 10801||($height>=80456&&$height<80460)) {
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return "5555555555"; //hard fork 10900 resistance, force new difficulty
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}
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// last 20 blocks used to check the block times
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$limit = 20;
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if ($height < 20) {
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$limit = $height - 1;
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}
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// for the first 10 blocks, use the genesis difficulty
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if ($height < 10) {
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return $current['difficulty'];
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}
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// before mnn hf
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if ($height<80000) {
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// elapsed time between the last 20 blocks
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$first = $db->row("SELECT `date` FROM blocks ORDER by height DESC LIMIT $limit,1");
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$time = $current['date'] - $first['date'];
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// avg block time
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$result = ceil($time / $limit);
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_log("Block time: $result", 3);
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// if larger than 200 sec, increase by 5%
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if ($result > 220) {
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$dif = bcmul($current['difficulty'], 1.05);
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} elseif ($result < 260) {
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// if lower, decrease by 5%
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$dif = bcmul($current['difficulty'], 0.95);
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} else {
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// keep current difficulty
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$dif = $current['difficulty'];
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}
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}elseif($height>=80458){
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$type=$height%2;
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$current=$db->row("SELECT difficulty from blocks WHERE height<=:h ORDER by height DESC LIMIT 1,1",[":h"=>$height]);
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$blks=0;
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$total_time=0;
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$blk = $db->run("SELECT `date`, height FROM blocks WHERE height<=:h ORDER by height DESC LIMIT 20",[":h"=>$height]);
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for ($i=0;$i<19;$i++) {
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$ctype=$blk[$i+1]['height']%2;
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$time=$blk[$i]['date']-$blk[$i+1]['date'];
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if ($type!=$ctype) {
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continue;
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}
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$blks++;
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$total_time+=$time;
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}
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$result=ceil($total_time/$blks);
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_log("Block time: $result", 3);
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if ($result > 260) {
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$dif = bcmul($current['difficulty'], 1.05);
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} elseif ($result < 220) {
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// if lower, decrease by 5%
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$dif = bcmul($current['difficulty'], 0.95);
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} else {
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// keep current difficulty
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$dif = $current['difficulty'];
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}
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} else {
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// hardfork 80000, fix difficulty targetting
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$type=$height%3;
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// for mn, we use gpu diff
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if ($type == 2) {
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return $current['difficulty'];
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}
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$blks=0;
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$total_time=0;
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$blk = $db->run("SELECT `date`, height FROM blocks ORDER by height DESC LIMIT 60");
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for ($i=0;$i<59;$i++) {
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$ctype=$blk[$i+1]['height']%3;
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$time=$blk[$i]['date']-$blk[$i+1]['date'];
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if ($type!=$ctype) {
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continue;
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}
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$blks++;
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$total_time+=$time;
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}
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$result=ceil($total_time/$blks);
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_log("Block time: $result", 3);
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// if larger than 260 sec, increase by 5%
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if ($result > 260) {
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$dif = bcmul($current['difficulty'], 1.05);
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} elseif ($result < 220) {
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// if lower, decrease by 5%
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$dif = bcmul($current['difficulty'], 0.95);
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} else {
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// keep current difficulty
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$dif = $current['difficulty'];
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}
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}
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if (strpos($dif, '.') !== false) {
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$dif = substr($dif, 0, strpos($dif, '.'));
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}
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//minimum and maximum diff
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if ($dif < 1000) {
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$dif = 1000;
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}
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if ($dif > 9223372036854775800) {
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$dif = 9223372036854775800;
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}
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_log("Difficulty: $dif", 3);
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return $dif;
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}
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// calculates the maximum block size and increase by 10% the number of transactions if > 100 on the last 100 blocks
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public function max_transactions()
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{
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global $db;
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$current = $this->current();
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$limit = $current['height'] - 100;
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$avg = $db->single("SELECT AVG(transactions) FROM blocks WHERE height>:limit", [":limit" => $limit]);
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if ($avg < 100) {
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return 100;
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}
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return ceil($avg * 1.1);
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}
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// calculate the reward for each block
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public function reward($id, $data = [])
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{
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// starting reward
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$reward = 1000;
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// decrease by 1% each 10800 blocks (approx 1 month)
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$factor = floor($id / 10800) / 100;
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$reward -= $reward * $factor;
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if ($reward < 0) {
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$reward = 0;
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}
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// calculate the transaction fees
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$fees = 0;
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if (count($data) > 0) {
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foreach ($data as $x) {
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$fees += $x['fee'];
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}
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}
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return number_format($reward + $fees, 8, '.', '');
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}
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// checks the validity of a block
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public function check($data)
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{
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// argon must have at least 20 chars
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if (strlen($data['argon']) < 20) {
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_log("Invalid block argon - $data[argon]");
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return false;
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}
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$acc = new Account();
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if($data['date']>time()+30){
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_log("Future block - $data[date] $data[public_key]",2);
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return false;
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}
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// generator's public key must be valid
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if (!$acc->valid_key($data['public_key'])) {
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_log("Invalid public key - $data[public_key]");
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return false;
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}
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//difficulty should be the same as our calculation
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if ($data['difficulty'] != $this->difficulty()) {
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_log("Invalid difficulty - $data[difficulty] - ".$this->difficulty());
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return false;
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}
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//check the argon hash and the nonce to produce a valid block
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if (!$this->mine($data['public_key'], $data['nonce'], $data['argon'], $data['difficulty'], 0, 0, $data['date'])) {
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_log("Mine check failed");
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return false;
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}
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return true;
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}
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// creates a new block on this node
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public function forge($nonce, $argon, $public_key, $private_key)
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{
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//check the argon hash and the nonce to produce a valid block
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if (!$this->mine($public_key, $nonce, $argon)) {
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_log("Forge failed - Invalid argon");
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return false;
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}
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// the block's date timestamp must be bigger than the last block
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$current = $this->current();
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$height = $current['height'] += 1;
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$date = time();
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if ($date <= $current['date']) {
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_log("Forge failed - Date older than last block");
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return false;
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}
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// get the mempool transactions
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$txn = new Transaction();
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$data = $txn->mempool($this->max_transactions());
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$difficulty = $this->difficulty();
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$acc = new Account();
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$generator = $acc->get_address($public_key);
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// always sort the transactions in the same way
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ksort($data);
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// sign the block
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$signature = $this->sign($generator, $height, $date, $nonce, $data, $private_key, $difficulty, $argon);
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// reward transaction and signature
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$reward = $this->reward($height, $data);
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if($height>=80458){
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//reward the masternode
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global $db;
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$mn_winner=$db->single(
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"SELECT public_key FROM masternode WHERE status=1 AND blacklist<:current AND height<:start ORDER by last_won ASC, public_key ASC LIMIT 1",
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[":current"=>$height, ":start"=>$height-360]
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);
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_log("MN Winner: $mn_winner",2);
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if($mn_winner!==false){
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$mn_reward=round(0.33*$reward,8);
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$reward=round($reward-$mn_reward,8);
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$reward=number_format($reward,8,".","");
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$mn_reward=number_format($mn_reward,8,".","");
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_log("MN Reward: $mn_reward",2);
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}
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}
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$msg = '';
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$transaction = [
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"src" => $generator,
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"dst" => $generator,
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"val" => $reward,
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"version" => 0,
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"date" => $date,
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"message" => $msg,
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"fee" => "0.00000000",
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"public_key" => $public_key,
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];
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ksort($transaction);
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$reward_signature = $txn->sign($transaction, $private_key);
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// add the block to the blockchain
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$res = $this->add(
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$height,
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$public_key,
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$nonce,
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$data,
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$date,
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$signature,
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$difficulty,
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$reward_signature,
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$argon
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);
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if (!$res) {
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_log("Forge failed - Block->Add() failed");
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return false;
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}
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return true;
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}
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public function blacklist_masternodes()
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{
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global $db;
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_log("Checking if there are masternodes to be blacklisted", 2);
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$current = $this->current();
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if (($current['height']-1)%3!=2) {
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_log("bad height");
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return;
|
|
}
|
|
$last=$this->get($current['height']-1);
|
|
$total_time=$current['date']-$last['date'];
|
|
_log("blacklist total time $total_time");
|
|
if ($total_time<=600&&$current['height']<80500) {
|
|
return;
|
|
}
|
|
if($current['height']>=80500&&$total_time<360){
|
|
return false;
|
|
}
|
|
if($current['height']>=80500){
|
|
$total_time-=360;
|
|
$tem=floor($total_time/120)+1;
|
|
if($tem>5) $tem=5;
|
|
} else {
|
|
$tem=floor($total_time/600);
|
|
}
|
|
_log("We have masternodes to blacklist - $tem", 2);
|
|
$ban=$db->run(
|
|
"SELECT public_key, blacklist, fails, last_won FROM masternode WHERE status=1 AND blacklist<:current AND height<:start ORDER by last_won ASC, public_key ASC LIMIT 0,$tem",
|
|
[":current"=>$last['height'], ":start"=>$last['height']-360]
|
|
);
|
|
_log(json_encode($ban));
|
|
$i=0;
|
|
foreach ($ban as $b) {
|
|
$this->masternode_log($b['public_key'], $current['height'], $current['id']);
|
|
_log("Blacklisting masternode - $i $b[public_key]", 2);
|
|
$btime=10;
|
|
if($current['height']>83000) $btime=360;
|
|
$db->run("UPDATE masternode SET fails=fails+1, blacklist=:blacklist WHERE public_key=:public_key", [":public_key"=>$b['public_key'], ":blacklist"=> $current['height']+(($b['fails']+1)*$btime)]);
|
|
$i++;
|
|
}
|
|
}
|
|
|
|
// check if the arguments are good for mining a specific block
|
|
public function mine($public_key, $nonce, $argon, $difficulty = 0, $current_id = 0, $current_height = 0, $time=0)
|
|
{
|
|
global $_config;
|
|
|
|
// invalid future blocks
|
|
if($time>time()+30){
|
|
return false;
|
|
}
|
|
|
|
|
|
// if no id is specified, we use the current
|
|
if ($current_id === 0 || $current_height === 0) {
|
|
$current = $this->current();
|
|
$current_id = $current['id'];
|
|
$current_height = $current['height'];
|
|
}
|
|
_log("Block Timestamp $time", 3);
|
|
if ($time == 0) {
|
|
$time=time();
|
|
}
|
|
// get the current difficulty if empty
|
|
if ($difficulty === 0) {
|
|
$difficulty = $this->difficulty();
|
|
}
|
|
|
|
if (empty($public_key)) {
|
|
_log("Empty public key", 1);
|
|
return false;
|
|
}
|
|
|
|
if ($current_height<80000) {
|
|
|
|
// the argon parameters are hardcoded to avoid any exploits
|
|
if ($current_height > 10800) {
|
|
_log("Block below 80000 but after 10800, using 512MB argon", 2);
|
|
$argon = '$argon2i$v=19$m=524288,t=1,p=1'.$argon; //10800 block hard fork - resistance against gpu
|
|
} else {
|
|
_log("Block below 10800, using 16MB argon", 2);
|
|
$argon = '$argon2i$v=19$m=16384,t=4,p=4'.$argon;
|
|
}
|
|
|
|
} elseif($current_height>=80458){
|
|
if ($current_height%2==0) {
|
|
// cpu mining
|
|
_log("CPU Mining - $current_height", 2);
|
|
$argon = '$argon2i$v=19$m=524288,t=1,p=1'.$argon;
|
|
} else {
|
|
// gpu mining
|
|
_log("GPU Mining - $current_height", 2);
|
|
$argon = '$argon2i$v=19$m=16384,t=4,p=4'.$argon;
|
|
}
|
|
|
|
} else {
|
|
_log("Block > 80000 - $current_height", 2);
|
|
if ($current_height%3==0) {
|
|
// cpu mining
|
|
_log("CPU Mining - $current_height", 2);
|
|
$argon = '$argon2i$v=19$m=524288,t=1,p=1'.$argon;
|
|
} elseif ($current_height%3==1) {
|
|
// gpu mining
|
|
_log("GPU Mining - $current_height", 2);
|
|
$argon = '$argon2i$v=19$m=16384,t=4,p=4'.$argon;
|
|
} else {
|
|
_log("Masternode Mining - $current_height", 2);
|
|
// masternode
|
|
global $db;
|
|
|
|
// fake time
|
|
if ($time>time()) {
|
|
_log("Masternode block in the future - $time", 1);
|
|
return false;
|
|
}
|
|
|
|
// selecting the masternode winner in order
|
|
$winner=$db->single(
|
|
"SELECT public_key FROM masternode WHERE status=1 AND blacklist<:current AND height<:start ORDER by last_won ASC, public_key ASC LIMIT 1",
|
|
[":current"=>$current_height, ":start"=>$current_height-360]
|
|
);
|
|
|
|
// if there are no active masternodes, give the block to gpu
|
|
if ($winner===false) {
|
|
_log("No active masternodes, reverting to gpu", 1);
|
|
$argon = '$argon2i$v=19$m=16384,t=4,p=4'.$argon;
|
|
} else {
|
|
_log("The first masternode winner should be $winner", 1);
|
|
// 4 mins need to pass since last block
|
|
$last_time=$db->single("SELECT `date` FROM blocks WHERE height=:height", [":height"=>$current_height]);
|
|
if ($time-$last_time<240&&$_config['testnet']==false) {
|
|
_log("4 minutes have not passed since the last block - $time", 1);
|
|
return false;
|
|
}
|
|
|
|
if ($public_key==$winner) {
|
|
return true;
|
|
}
|
|
// if 10 mins have passed, try to give the block to the next masternode and do this every 10mins
|
|
_log("Last block time: $last_time, difference: ".($time-$last_time), 3);
|
|
if (($time-$last_time>600&&$current_height<80500)||($time-$last_time>360&&$current_height>=80500)) {
|
|
_log("Current public_key $public_key", 3);
|
|
if($current_height>=80500){
|
|
$total_time=$time-$last_time;
|
|
$total_time-=360;
|
|
$tem=floor($total_time/120)+1;
|
|
|
|
} else {
|
|
$tem=floor(($time-$last_time)/600);
|
|
}
|
|
$winner=$db->single(
|
|
"SELECT public_key FROM masternode WHERE status=1 AND blacklist<:current AND height<:start ORDER by last_won ASC, public_key ASC LIMIT $tem,1",
|
|
[":current"=>$current_height, ":start"=>$current_height-360]
|
|
);
|
|
_log("Moving to the next masternode - $tem - $winner", 1);
|
|
// if all masternodes are dead, give the block to gpu
|
|
if ($winner===false||($tem>=5&&$current_height>=80500)) {
|
|
_log("All masternodes failed, giving the block to gpu", 1);
|
|
$argon = '$argon2i$v=19$m=16384,t=4,p=4'.$argon;
|
|
} elseif ($winner==$public_key) {
|
|
return true;
|
|
} else {
|
|
return false;
|
|
}
|
|
} else {
|
|
_log("A different masternode should win this block $public_key - $winner", 2);
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// the hash base for agon
|
|
$base = "$public_key-$nonce-".$current_id."-$difficulty";
|
|
|
|
|
|
// check argon's hash validity
|
|
if (!password_verify($base, $argon)) {
|
|
_log("Argon verify failed - $base - $argon", 2);
|
|
return false;
|
|
}
|
|
|
|
// all nonces are valid in testnet
|
|
if ($_config['testnet'] == true) {
|
|
return true;
|
|
}
|
|
|
|
// prepare the base for the hashing
|
|
$hash = $base.$argon;
|
|
|
|
// hash the base 6 times
|
|
for ($i = 0; $i < 5;
|
|
$i++) {
|
|
$hash = hash("sha512", $hash, true);
|
|
}
|
|
$hash = hash("sha512", $hash);
|
|
|
|
// split it in 2 char substrings, to be used as hex
|
|
$m = str_split($hash, 2);
|
|
|
|
// calculate a number based on 8 hex numbers - no specific reason, we just needed an algoritm to generate the number from the hash
|
|
$duration = hexdec($m[10]).hexdec($m[15]).hexdec($m[20]).hexdec($m[23]).hexdec($m[31]).hexdec($m[40]).hexdec($m[45]).hexdec($m[55]);
|
|
|
|
// the number must not start with 0
|
|
$duration = ltrim($duration, '0');
|
|
|
|
// divide the number by the difficulty and create the deadline
|
|
$result = gmp_div($duration, $difficulty);
|
|
|
|
// if the deadline >0 and <=240, the arguments are valid fora block win
|
|
if ($result > 0 && $result <= 240) {
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
|
|
// parse the block transactions
|
|
public function parse_block($block, $height, $data, $test = true, $bootstrapping=false)
|
|
{
|
|
global $db;
|
|
// data must be array
|
|
if ($data === false) {
|
|
return false;
|
|
}
|
|
$acc = new Account();
|
|
$trx = new Transaction();
|
|
// no transactions means all are valid
|
|
if (count($data) == 0) {
|
|
return true;
|
|
}
|
|
|
|
// check if the number of transactions is not bigger than current block size
|
|
$max = $this->max_transactions();
|
|
if (count($data) > $max) {
|
|
return false;
|
|
}
|
|
|
|
$balance = [];
|
|
$mns = [];
|
|
|
|
foreach ($data as &$x) {
|
|
// get the sender's account if empty
|
|
if (empty($x['src'])) {
|
|
$x['src'] = $acc->get_address($x['public_key']);
|
|
}
|
|
if (!$bootstrapping) {
|
|
//validate the transaction
|
|
if (!$trx->check($x, $height)) {
|
|
return false;
|
|
}
|
|
if ($x['version']>=100&&$x['version']<110) {
|
|
$mns[] = $x['public_key'];
|
|
}
|
|
|
|
|
|
// prepare total balance
|
|
$balance[$x['src']] += $x['val'] + $x['fee'];
|
|
|
|
// check if the transaction is already on the blockchain
|
|
if ($db->single("SELECT COUNT(1) FROM transactions WHERE id=:id", [":id" => $x['id']]) > 0) {
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
//only a single masternode transaction per block for any masternode
|
|
if (count($mns) != count(array_unique($mns))) {
|
|
_log("Too many masternode transactions", 3);
|
|
return false;
|
|
}
|
|
|
|
if (!$bootstrapping) {
|
|
// check if the account has enough balance to perform the transaction
|
|
foreach ($balance as $id => $bal) {
|
|
$res = $db->single(
|
|
"SELECT COUNT(1) FROM accounts WHERE id=:id AND balance>=:balance",
|
|
[":id" => $id, ":balance" => $bal]
|
|
);
|
|
if ($res == 0) {
|
|
return false; // not enough balance for the transactions
|
|
}
|
|
}
|
|
}
|
|
// if the test argument is false, add the transactions to the blockchain
|
|
if ($test == false) {
|
|
foreach ($data as $d) {
|
|
$res = $trx->add($block, $height, $d);
|
|
if ($res == false) {
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
// initialize the blockchain, add the genesis block
|
|
private function genesis()
|
|
{
|
|
global $db;
|
|
$signature = 'AN1rKvtLTWvZorbiiNk5TBYXLgxiLakra2byFef9qoz1bmRzhQheRtiWivfGSwP6r8qHJGrf8uBeKjNZP1GZvsdKUVVN2XQoL';
|
|
$generator = '2P67zUANj7NRKTruQ8nJRHNdKMroY6gLw4NjptTVmYk6Hh1QPYzzfEa9z4gv8qJhuhCNM8p9GDAEDqGUU1awaLW6';
|
|
$public_key = 'PZ8Tyr4Nx8MHsRAGMpZmZ6TWY63dXWSCyjGMdVDanywM3CbqvswVqysqU8XS87FcjpqNijtpRSSQ36WexRDv3rJL5X8qpGvzvznuErSRMfb2G6aNoiaT3aEJ';
|
|
$reward_signature = '381yXZ3yq2AXHHdXfEm8TDHS4xJ6nkV4suXtUUvLjtvuyi17jCujtwcwXuYALM1F3Wiae2A4yJ6pXL1kTHJxZbrJNgtsKEsb';
|
|
$argon = '$M1ZpVzYzSUxYVFp6cXEwWA$CA6p39MVX7bvdXdIIRMnJuelqequanFfvcxzQjlmiik';
|
|
|
|
$difficulty = "5555555555";
|
|
$height = 1;
|
|
$data = [];
|
|
$date = '1515324995';
|
|
$nonce = '4QRKTSJ+i9Gf9ubPo487eSi+eWOnIBt9w4Y+5J+qbh8=';
|
|
|
|
|
|
$res = $this->add(
|
|
$height,
|
|
$public_key,
|
|
$nonce,
|
|
$data,
|
|
$date,
|
|
$signature,
|
|
$difficulty,
|
|
$reward_signature,
|
|
$argon
|
|
);
|
|
if (!$res) {
|
|
api_err("Could not add the genesis block.");
|
|
}
|
|
}
|
|
|
|
// delete last X blocks
|
|
public function pop($no = 1)
|
|
{
|
|
$current = $this->current();
|
|
$this->delete($current['height'] - $no + 1);
|
|
}
|
|
|
|
// delete all blocks >= height
|
|
public function delete($height)
|
|
{
|
|
if ($height < 2) {
|
|
$height = 2;
|
|
}
|
|
global $db;
|
|
$trx = new Transaction();
|
|
|
|
$r = $db->run("SELECT * FROM blocks WHERE height>=:height ORDER by height DESC", [":height" => $height]);
|
|
|
|
if (count($r) == 0) {
|
|
return;
|
|
}
|
|
$db->beginTransaction();
|
|
$db->exec("LOCK TABLES blocks WRITE, accounts WRITE, transactions WRITE, mempool WRITE, masternode WRITE");
|
|
foreach ($r as $x) {
|
|
$res = $trx->reverse($x['id']);
|
|
if ($res === false) {
|
|
$db->rollback();
|
|
$db->exec("UNLOCK TABLES");
|
|
return false;
|
|
}
|
|
$res = $db->run("DELETE FROM blocks WHERE id=:id", [":id" => $x['id']]);
|
|
if ($res != 1) {
|
|
$db->rollback();
|
|
$db->exec("UNLOCK TABLES");
|
|
return false;
|
|
}
|
|
}
|
|
|
|
$db->commit();
|
|
$db->exec("UNLOCK TABLES");
|
|
return true;
|
|
}
|
|
|
|
|
|
// delete specific block
|
|
public function delete_id($id)
|
|
{
|
|
global $db;
|
|
$trx = new Transaction();
|
|
|
|
$x = $db->row("SELECT * FROM blocks WHERE id=:id", [":id" => $id]);
|
|
|
|
if ($x === false) {
|
|
return false;
|
|
}
|
|
// avoid race conditions on blockchain manipulations
|
|
$db->beginTransaction();
|
|
$db->exec("LOCK TABLES blocks WRITE, accounts WRITE, transactions WRITE, mempool WRITE");
|
|
// reverse all transactions of the block
|
|
$res = $trx->reverse($x['id']);
|
|
if ($res === false) {
|
|
// rollback if you can't reverse the transactions
|
|
$db->rollback();
|
|
$db->exec("UNLOCK TABLES");
|
|
return false;
|
|
}
|
|
// remove the actual block
|
|
$res = $db->run("DELETE FROM blocks WHERE id=:id", [":id" => $x['id']]);
|
|
if ($res != 1) {
|
|
//rollback if you can't delete the block
|
|
$db->rollback();
|
|
$db->exec("UNLOCK TABLES");
|
|
return false;
|
|
}
|
|
// commit and release if all good
|
|
$db->commit();
|
|
$db->exec("UNLOCK TABLES");
|
|
return true;
|
|
}
|
|
|
|
|
|
// sign a new block, used when mining
|
|
public function sign($generator, $height, $date, $nonce, $data, $key, $difficulty, $argon)
|
|
{
|
|
$json = json_encode($data);
|
|
$info = "{$generator}-{$height}-{$date}-{$nonce}-{$json}-{$difficulty}-{$argon}";
|
|
|
|
$signature = ec_sign($info, $key);
|
|
return $signature;
|
|
}
|
|
|
|
// generate the sha512 hash of the block data and converts it to base58
|
|
public function hash($public_key, $height, $date, $nonce, $data, $signature, $difficulty, $argon)
|
|
{
|
|
$json = json_encode($data);
|
|
$hash = hash("sha512", "{$public_key}-{$height}-{$date}-{$nonce}-{$json}-{$signature}-{$difficulty}-{$argon}");
|
|
return hex2coin($hash);
|
|
}
|
|
|
|
|
|
// exports the block data, to be used when submitting to other peers
|
|
public function export($id = "", $height = "")
|
|
{
|
|
if (empty($id) && empty($height)) {
|
|
return false;
|
|
}
|
|
|
|
global $db;
|
|
$trx = new Transaction();
|
|
if (!empty($height)) {
|
|
$block = $db->row("SELECT * FROM blocks WHERE height=:height", [":height" => $height]);
|
|
} else {
|
|
$block = $db->row("SELECT * FROM blocks WHERE id=:id", [":id" => $id]);
|
|
}
|
|
|
|
if (!$block) {
|
|
return false;
|
|
}
|
|
$r = $db->run("SELECT * FROM transactions WHERE version>0 AND block=:block", [":block" => $block['id']]);
|
|
$transactions = [];
|
|
foreach ($r as $x) {
|
|
if ($x['version']>110) {
|
|
//internal transactions
|
|
continue;
|
|
}
|
|
$trans = [
|
|
"id" => $x['id'],
|
|
"dst" => $x['dst'],
|
|
"val" => $x['val'],
|
|
"fee" => $x['fee'],
|
|
"signature" => $x['signature'],
|
|
"message" => $x['message'],
|
|
"version" => $x['version'],
|
|
"date" => $x['date'],
|
|
"public_key" => $x['public_key'],
|
|
];
|
|
ksort($trans);
|
|
$transactions[$x['id']] = $trans;
|
|
}
|
|
ksort($transactions);
|
|
$block['data'] = $transactions;
|
|
|
|
// the reward transaction always has version 0
|
|
$gen = $db->row(
|
|
"SELECT public_key, signature FROM transactions WHERE version=0 AND block=:block AND message=''",
|
|
[":block" => $block['id']]
|
|
);
|
|
$block['public_key'] = $gen['public_key'];
|
|
$block['reward_signature'] = $gen['signature'];
|
|
return $block;
|
|
}
|
|
|
|
//return a specific block as array
|
|
public function get($height)
|
|
{
|
|
global $db;
|
|
if (empty($height)) {
|
|
return false;
|
|
}
|
|
$block = $db->row("SELECT * FROM blocks WHERE height=:height", [":height" => $height]);
|
|
return $block;
|
|
}
|
|
}
|