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documentation + base58 fix

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This commit is contained in:
Arionum
2018-02-22 19:22:28 +02:00
parent e1971dd741
commit 8a648dcc8a
18 changed files with 1749 additions and 226 deletions
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72
include/transaction.inc.php
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@@ -1,8 +1,7 @@
<?php
class Transaction {
// reverse and remove all transactions from a block
public function reverse($block){
global $db;
$acc=new Account;
@@ -10,14 +9,17 @@ class Transaction {
foreach($r as $x){
if(empty($x['src'])) $x['src']=$acc->get_address($x['public_key']);
$db->run("UPDATE accounts SET balance=balance-:val WHERE id=:id",array(":id"=>$x['dst'], ":val"=>$x['val']));
// on version 0 / reward transaction, don't credit anyone
if($x['version']>0) $db->run("UPDATE accounts SET balance=balance+:val WHERE id=:id",array(":id"=>$x['src'], ":val"=>$x['val']+$x['fee']));
if($x['version']>0) $this->add_mempool($x);
// add the transactions to mempool
if($x['version']>0) $this->add_mempool($x);
$res= $db->run("DELETE FROM transactions WHERE id=:id",array(":id"=>$x['id']));
if($res!=1) return false;
}
}
// clears the mempool
public function clean_mempool(){
global $db;
$block= new Block;
@@ -26,12 +28,14 @@ class Transaction {
$limit=$height-1000;
$db->run("DELETE FROM mempool WHERE height<:limit",array(":limit"=>$limit));
}
// returns X transactions from mempool
public function mempool($max){
global $db;
$block=new Block;
$current=$block->current();
$height=$current['height']+1;
// only get the transactions that are not locked with a future height
$r=$db->run("SELECT * FROM mempool WHERE height<=:height ORDER by val/fee DESC LIMIT :max",array(":height"=>$height, ":max"=>$max+50));
$transactions=array();
if(count($r)>0){
@@ -72,11 +76,13 @@ class Transaction {
$transactions[$x['id']]=$trans;
}
}
// always sort the array
ksort($transactions);
return $transactions;
}
// add a new transaction to mempool and lock it with the current height
public function add_mempool($x, $peer=""){
global $db;
$block= new Block;
@@ -90,6 +96,7 @@ class Transaction {
}
// add a new transaction to the blockchain
public function add($block,$height, $x){
global $db;
$acc= new Account;
@@ -100,22 +107,24 @@ class Transaction {
$res=$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",$bind);
if($res!=1) return false;
$db->run("UPDATE accounts SET balance=balance+:val WHERE id=:id",array(":id"=>$x['dst'], ":val"=>$x['val']));
if($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']));
// no debit when the transaction is reward
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']));
$db->run("DELETE FROM mempool WHERE id=:id",array(":id"=>$x['id']));
return true;
}
// hash the transaction's most important fields and create the transaction ID
public function hash($x){
$info=$x['val']."-".$x['fee']."-".$x['dst']."-".$x['message']."-".$x['version']."-".$x['public_key']."-".$x['date']."-".$x['signature'];
$hash= hash("sha512",$info);
return hex2coin($hash);
}
// check the transaction for validity
public function check($x, $height=0){
// if no specific block, use current
if($height===0){
$block=new Block;
$current=$block->current();
@@ -124,32 +133,54 @@ class Transaction {
$acc= new Account;
$info=$x['val']."-".$x['fee']."-".$x['dst']."-".$x['message']."-".$x['version']."-".$x['public_key']."-".$x['date'];
// the value must be >=0
if($x['val']<0){ _log("$x[id] - Value below 0"); return false; }
if($x['fee']<0) { _log("$x[id] - Fee below 0"); return false; }
// the fee must be >=0
if($x['fee']<0) { _log("$x[id] - Fee below 0"); return false; }
// the fee is 0.25%, hardcoded
$fee=$x['val']*0.0025;
$fee=number_format($fee,8,".","");
if($fee<0.00000001) $fee=0.00000001;
// max fee after block 10800 is 10
if($height>10800&&$fee>10) $fee=10; //10800
// added fee does not match
if($fee!=$x['fee']) { _log("$x[id] - Fee not 0.25%"); return false; }
// invalid destination address
if(!$acc->valid($x['dst'])) { _log("$x[id] - Invalid destination address"); return false; }
// reward transactions are not added via this function
if($x['version']<1) { _log("$x[id] - Invalid version <1"); return false; }
//if($x['version']>1) { _log("$x[id] - Invalid version >1"); return false; }
if(strlen($x['public_key'])<15) { _log("$x[id] - Invalid public key size"); return false; }
// public key must be at least 15 chars / probably should be replaced with the validator function
if(strlen($x['public_key'])<15) { _log("$x[id] - Invalid public key size"); return false; }
// no transactions before the genesis
if($x['date']<1511725068) { _log("$x[id] - Date before genesis"); return false; }
// no future transactions
if($x['date']>time()+86400) { _log("$x[id] - Date in the future"); return false; }
// prevent the resending of broken base58 transactions
if($height>17000&&$x['date']<1519319340) return false;
$id=$this->hash($x);
if($x['id']!=$id) { _log("$x[id] - Invalid hash"); return false; }
// the hash does not match our regenerated hash
if($x['id']!=$id) {
// fix for broken base58 library which was used until block 17000, accepts hashes without the first 1 or 2 bytes
$xs=base58_decode($x['id']);
if(((strlen($xs)!=63||substr($id,1)!=$x['id'])&&(strlen($xs)!=62||substr($id,2)!=$x['id']))||$height>17000){
_log("$x[id] - $id - Invalid hash");
return false;
}
}
if(!$acc->check_signature($info, $x['signature'], $x['public_key'])) { _log("$x[id] - Invalid signature"); return false; }
//verify the ecdsa signature
if(!$acc->check_signature($info, $x['signature'], $x['public_key'])) { _log("$x[id] - Invalid signature"); return false; }
return true;
}
// sign a transaction
public function sign($x, $private_key){
$info=$x['val']."-".$x['fee']."-".$x['dst']."-".$x['message']."-".$x['version']."-".$x['public_key']."-".$x['date'];
$signature=ec_sign($info,$private_key);
@@ -158,14 +189,14 @@ class Transaction {
}
//export a mempool transaction
public function export($id){
global $db;
$r=$db->row("SELECT * FROM mempool WHERE id=:id",array(":id"=>$id));
//unset($r['peer']);
return $r;
}
// get the transaction data as array
public function get_transaction($id){
global $db;
$acc=new Account;
@@ -188,6 +219,7 @@ class Transaction {
}
// return the transactions for a specific block id or height
public function get_transactions($height="", $id=""){
global $db;
$acc=new Account;
@@ -216,7 +248,7 @@ class Transaction {
}
// get a specific mempool transaction as array
public function get_mempool_transaction($id){
global $db;
$x=$db->row("SELECT * FROM mempool WHERE id=:id",array(":id"=>$id));