206 lines
8.7 KiB
PHP
Executable File
206 lines
8.7 KiB
PHP
Executable File
<?php
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class Transaction {
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public function reverse($block){
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global $db;
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$acc=new Account;
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$r=$db->run("SELECT * FROM transactions WHERE block=:block",array(":block"=>$block));
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foreach($r as $x){
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if(empty($x['src'])) $x['src']=$acc->get_address($x['public_key']);
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$db->run("UPDATE accounts SET balance=balance-:val WHERE id=:id",array(":id"=>$x['dst'], ":val"=>$x['val']));
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if($x['version']>0) $db->run("UPDATE accounts SET balance=balance+:val WHERE id=:id",array(":id"=>$x['src'], ":val"=>$x['val']+$x['fee']));
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if($x['version']>0) $this->add_mempool($x);
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$res= $db->run("DELETE FROM transactions WHERE id=:id",array(":id"=>$x['id']));
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if($res!=1) return false;
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}
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}
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public function clean_mempool(){
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global $db;
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$block= new Block;
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$current=$block->current();
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$height=$current['height'];
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$limit=$height-1000;
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$db->run("DELETE FROM mempool WHERE height<:limit",array(":limit"=>$limit));
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}
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public function mempool($max){
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global $db;
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$block=new Block;
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$current=$block->current();
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$height=$current['height']+1;
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$r=$db->run("SELECT * FROM mempool WHERE height<=:height ORDER by val/fee DESC LIMIT :max",array(":height"=>$height, ":max"=>$max+50));
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$transactions=array();
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if(count($r)>0){
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$i=0;
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$balance=array();
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foreach($r as $x){
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$trans=array("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"=>$x['public_key']);
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if($i>=$max) break;
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if(empty($x['public_key'])){
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_log("$x[id] - Transaction has empty public_key");
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continue;
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}
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if(empty($x['src'])){
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_log("$x[id] - Transaction has empty src");
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continue;
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}
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if(!$this->check($trans)){
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var_dump($trans);
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_log("$x[id] - Transaction Check Failed");
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continue;
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}
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$balance[$x['src']]+=$x['val']+$x['fee'];
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if($db->single("SELECT COUNT(1) FROM transactions WHERE id=:id",array(":id"=>$x['id']))>0) {
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_log("$x[id] - Duplicate transaction");
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continue; //duplicate transaction
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}
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$res=$db->single("SELECT COUNT(1) FROM accounts WHERE id=:id AND balance>=:balance",array(":id"=>$x['src'], ":balance"=>$balance[$x['src']]));
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if($res==0) {
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_log("$x[id] - Not enough funds in balance");
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continue; // not enough balance for the transactions
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}
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$i++;
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ksort($trans);
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$transactions[$x['id']]=$trans;
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}
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}
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ksort($transactions);
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return $transactions;
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}
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public function add_mempool($x, $peer=""){
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global $db;
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$block= new Block;
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$current=$block->current();
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$height=$current['height'];
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$x['id']=san($x['id']);
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$bind=array(":peer"=>$peer, ":id"=>$x['id'],"public_key"=>$x['public_key'], ":height"=>$height, ":src"=>$x['src'],":dst"=>$x['dst'],":val"=>$x['val'], ":fee"=>$x['fee'],":signature"=>$x['signature'], ":version"=>$x['version'],":date"=>$x['date'], ":message"=>$x['message']);
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$db->run("INSERT into mempool SET peer=:peer, id=:id, public_key=:public_key, height=:height, src=:src, dst=:dst, val=:val, fee=:fee, signature=:signature, version=:version, message=:message, `date`=:date",$bind);
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return true;
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}
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public function add($block,$height, $x){
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global $db;
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$acc= new Account;
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$acc->add($x['public_key'], $block);
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$acc->add_id($x['dst'],$block);
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$x['id']=san($x['id']);
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$bind=array(":id"=>$x['id'], ":public_key"=>$x['public_key'],":height"=>$height, ":block"=>$block, ":dst"=>$x['dst'],":val"=>$x['val'], ":fee"=>$x['fee'],":signature"=>$x['signature'], ":version"=>$x['version'],":date"=>$x['date'], ":message"=>$x['message']);
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$res=$db->run("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",$bind);
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if($res!=1) return false;
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$db->run("UPDATE accounts SET balance=balance+:val WHERE id=:id",array(":id"=>$x['dst'], ":val"=>$x['val']));
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if($x['version']>0) $db->run("UPDATE accounts SET balance=(balance-:val)-:fee WHERE id=:id",array(":id"=>$x['src'], ":val"=>$x['val'], ":fee"=>$x['fee']));
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$db->run("DELETE FROM mempool WHERE id=:id",array(":id"=>$x['id']));
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return true;
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}
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public function hash($x){
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$info=$x['val']."-".$x['fee']."-".$x['dst']."-".$x['message']."-".$x['version']."-".$x['public_key']."-".$x['date']."-".$x['signature'];
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$hash= hash("sha512",$info);
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return hex2coin($hash);
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}
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public function check($x){
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$acc= new Account;
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$info=$x['val']."-".$x['fee']."-".$x['dst']."-".$x['message']."-".$x['version']."-".$x['public_key']."-".$x['date'];
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if($x['val']<0){ _log("$x[id] - Value below 0"); return false; }
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if($x['fee']<0) { _log("$x[id] - Fee below 0"); return false; }
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$fee=$x['val']*0.0025;
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if($fee<0.00000001) $fee=0.00000001;
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if($fee!=$x['fee']) { _log("$x[id] - Fee not 0.25%"); return false; }
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if(!$acc->valid($x['dst'])) { _log("$x[id] - Invalid destination address"); return false; }
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if($x['version']<1) { _log("$x[id] - Invalid version <1"); return false; }
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//if($x['version']>1) { _log("$x[id] - Invalid version >1"); return false; }
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if(strlen($x['public_key'])<15) { _log("$x[id] - Invalid public key size"); return false; }
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if($x['date']<1511725068) { _log("$x[id] - Date before genesis"); return false; }
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if($x['date']>time()+86400) { _log("$x[id] - Date in the future"); return false; }
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$id=$this->hash($x);
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if($x['id']!=$id) { _log("$x[id] - Invalid hash"); return false; }
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if(!$acc->check_signature($info, $x['signature'], $x['public_key'])) { _log("$x[id] - Invalid signature"); return false; }
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return true;
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}
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public function sign($x, $private_key){
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$info=$x['val']."-".$x['fee']."-".$x['dst']."-".$x['message']."-".$x['version']."-".$x['public_key']."-".$x['date'];
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$signature=ec_sign($info,$private_key);
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return $signature;
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}
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public function export($id){
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global $db;
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$r=$db->row("SELECT * FROM mempool WHERE id=:id",array(":id"=>$id));
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//unset($r['peer']);
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return $r;
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}
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public function get_transaction($id){
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global $db;
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$block=new Block;
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$current=$block->current();
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$acc=new Account;
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$x=$db->row("SELECT * FROM transactions WHERE id=:id",array(":id"=>$id));
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if(!$x) return false;
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$trans=array("block"=>$x['block'],"height"=>$x['height'], "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"=>$x['public_key']);
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$trans['src']=$acc->get_address($x['public_key']);
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$trans['confirmations']=$current['height']-$x['height'];
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if($x['version']==0) $trans['type']="mining";
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elseif($x['version']==1){
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if($x['dst']==$id) $trans['type']="credit";
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else $trans['type']="debit";
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} else {
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$trans['type']="other";
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}
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ksort($trans);
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return $trans;
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}
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public function get_mempool_transaction($id){
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global $db;
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$x=$db->row("SELECT * FROM mempool WHERE id=:id",array(":id"=>$id));
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if(!$x) return false;
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$trans=array("block"=>$x['block'],"height"=>$x['height'], "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"=>$x['public_key']);
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$trans['src']=$x['src'];
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$trans['type']="mempool";
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$trans['confirmations']=-1;
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ksort($trans);
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return $trans;
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}
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}
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?>
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