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Transaction.php
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Transaction.php
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<?php
namespace GrapheneNodeClient\Tools;
use GrapheneNodeClient\Commands\CommandQueryData;
use GrapheneNodeClient\Commands\CommandQueryDataInterface;
use GrapheneNodeClient\Commands\Single\GetBlockCommand;
use GrapheneNodeClient\Commands\Single\GetDynamicGlobalPropertiesCommand;
use GrapheneNodeClient\Commands\Single\LoginCommand;
use GrapheneNodeClient\Connectors\ConnectorInterface;
use GrapheneNodeClient\Tools\ChainOperations\OperationSerializer;
use t3ran13\ByteBuffer\ByteBuffer;
class Transaction
{
const CHAIN_STEEM = ConnectorInterface::PLATFORM_STEEMIT;
const CHAIN_GOLOS = ConnectorInterface::PLATFORM_GOLOS;
const CHAIN_VIZ = ConnectorInterface::PLATFORM_VIZ;
const CHAIN_WHALESHARES = ConnectorInterface::PLATFORM_WHALESHARES;
const CHAIN_ID = [
self::CHAIN_GOLOS => '782a3039b478c839e4cb0c941ff4eaeb7df40bdd68bd441afd444b9da763de12',
self::CHAIN_STEEM => '0000000000000000000000000000000000000000000000000000000000000000',
self::CHAIN_VIZ => '2040effda178d4fffff5eab7a915d4019879f5205cc5392e4bcced2b6edda0cd',
self::CHAIN_WHALESHARES => 'de999ada2ff7ed3d3d580381f229b40b5a0261aec48eb830e540080817b72866'
];
public static function getChainId($chainName)
{
if (!isset(self::CHAIN_ID[$chainName])) {
throw new TransactionSignException('Can\'t find chain_id');
}
return self::CHAIN_ID[$chainName];
}
/**
* @param ConnectorInterface $connector
* @param string $expirationTime is string in DateInterval format, example 'PT2M'
*
* @return CommandQueryData
* @throws \Exception
*/
public static function init(ConnectorInterface $connector, $expirationTime = 'PT2M')
{
$tx = null;
$command = new GetDynamicGlobalPropertiesCommand($connector);
$commandQueryData = new CommandQueryData();
$properties = $command->execute(
$commandQueryData
);
$blockId = $properties['result']['head_block_number'] - 2;
$command = new GetBlockCommand($connector);
$commandQueryData = new CommandQueryData();
$commandQueryData->setParamByKey('0', $blockId);
$block = $command->execute(
$commandQueryData
);
if (isset($properties['result']['head_block_number']) && isset($block['result']['previous'])) {
$refBlockNum = ($properties['result']['head_block_number'] - 3) & 0xFFFF;
$tx = new CommandQueryData();
$buf = new ByteBuffer();
$buf->write(hex2bin($block['result']['previous']));
$tx->setParams(
[[
'ref_block_num' => $refBlockNum,
'ref_block_prefix' => $buf->readInt32lE(4),
'expiration' => (new \DateTime($properties['result']['time']))->add(new \DateInterval($expirationTime))->format('Y-m-d\TH:i:s\.000'),
'operations' => [],
'extensions' => [],
'signatures' => []
]]
);
}
if (!($tx instanceof CommandQueryDataInterface)) {
throw new \Exception('cant init Tx');
}
return $tx;
}
/**
* @param string $chainName
* @param CommandQueryDataInterface $trxData
*
* @return string
*/
public static function getTxMsg($chainName, CommandQueryDataInterface $trxData)
{
//serialize transaction
$trxParams = $trxData->getParams();
$serBuffer = OperationSerializer::serializeTransaction($chainName, $trxParams, new ByteBuffer());
$serializedTx = self::getChainId($chainName) . bin2hex($serBuffer->read(0, $serBuffer->length()));
return $serializedTx;
}
/**
* @param string $chainName
* @param CommandQueryDataInterface $trxData
* @param string[] $privateWIFs
*
* @return mixed
* @throws \Exception
*/
public static function sign($chainName, CommandQueryDataInterface $trxData, $privateWIFs)
{
//becouse spec256k1-php canonical sign trouble will use php hack.
//If sign is not canonical, we have to chang msg (we will add 1 sec to tx expiration time) and try to sign again
$nTries = 0;
while (true) {
$nTries++;
$msg = self::getTxMsg($chainName, $trxData);
try {
foreach ($privateWIFs as $keyName => $privateWif) {
$index = count($trxData->getParams()[0]['signatures']);
/** @var CommandQueryData $trxData */
$trxData->setParamByKey('0:signatures:' . $index, self::signOperation($msg, $privateWif));
}
break;
} catch (TransactionSignException $e) {
if ($nTries > 200) {
//stop tries to find canonical sign
throw $e;
break;
} else {
/** @var CommandQueryData $trxData */
$params = $trxData->getParams();
foreach ($params as $key => $tx) {
$tx['expiration'] = (new \DateTime($tx['expiration']))
->add(new \DateInterval('PT0M1S'))
->format('Y-m-d\TH:i:s\.000');
$params[$key] = $tx;
}
$trxData->setParams($params);
}
}
}
return $trxData;
}
/**
* @param string $msg serialized Tx with prefix chain id
* @param string $privateWif
*
* @return string hex
* @throws \Exception
*/
protected static function signOperation($msg, $privateWif)
{
$context = secp256k1_context_create(SECP256K1_CONTEXT_SIGN | SECP256K1_CONTEXT_VERIFY);
$msg32 = hash('sha256', hex2bin($msg), true);
$privateKey = Auth::PrivateKeyFromWif($privateWif);
/** @var resource $signature */
$signatureRec = null;
$i = 0;
while (true) {
if ($i === 1) {
//sing always the same
throw new TransactionSignException("Can't to find canonical signature, {$i} ties");
}
$i++;
// echo "\n i=" . print_r($i, true) . '<pre>'; //FIXME delete it
if (secp256k1_ecdsa_sign_recoverable($context, $signatureRec, $msg32, $privateKey) !== 1) {
throw new TransactionSignException("Failed to create recoverable signature");
}
$signature = null;
if (secp256k1_ecdsa_recoverable_signature_convert($context, $signature, $signatureRec) !== 1) {
throw new TransactionSignException("Failed to create signature");
}
$der = null;
if (secp256k1_ecdsa_signature_serialize_der($context, $der, $signature) !== 1) {
throw new TransactionSignException("Failed to create DER");
}
// echo "\n" . print_r(bin2hex($der), true) . '<pre>'; //FIXME delete it
if (self::isSignatureCanonical($der)) {
break;
}
}
$serializedSig = null;
$recid = 0;
secp256k1_ecdsa_recoverable_signature_serialize_compact($context, $serializedSig, $recid, $signatureRec);
$serializedSig = hex2bin(base_convert($recid + 4 + 27, 10, 16)) . $serializedSig;
$length = strlen($serializedSig);
if ($length !== 65) {
throw new \Exception('Expecting 65 bytes for Tx signature, instead got ' . $length);
}
return bin2hex($serializedSig);
}
/**
* @param string $der string of binary
*
* @return bool
*/
public static function isSignatureCanonical($der)
{
$buffer = new ByteBuffer();
$buffer->write($der);
// lenR = der[3];
// lenS = der[5 + lenR];
// if (lenR === 32 && lenS === 32) {
$lenR = $buffer->readInt8(3);
$lenS = $buffer->readInt8(5 + $lenR);
// echo "\n" . var_dump($lenR, $lenS) . '<pre>'; //FIXME delete it
return $lenR === 32 && $lenS === 32;
}
// /**
// * @param string $serializedSig binary string serialized signature
// * @param string $skip skip the first byte with sing technical data (4 - compressed | 27 - compact)
// *
// * @return bool
// */
// public static function isSignatureCanonical($serializedSig, $skip)
// {
// // test after secp256k1_ecdsa_recoverable_signature_serialize_compact
// // public static bool IsCanonical(byte[] sig, int skip)
// // {
// // return !((sig[skip + 0] & 0x80) > 0)
// // && !(sig[skip + 0] == 0 && !((sig[skip + 1] & 0x80) > 0))
// // && !((sig[skip + 32] & 0x80) > 0)
// // && !(sig[skip + 32] == 0 && !((sig[skip + 33] & 0x80) > 0));
// // }
//
// $buffer = new ByteBuffer();
// $buffer->write($serializedSig);
//
// return !(($buffer->readInt8($skip + 0, 1) & 0x80) > 0)
// && !($buffer->readInt8($skip + 0, 1) === 0 && !(($buffer->readInt8($skip + 1, 1) & 0x80) > 0))
// && !(($buffer->readInt8($skip + 32, 1) & 0x80) > 0)
// && !($buffer->readInt8($skip + 32, 1) === 0 && !(($buffer->readInt8($skip + 33, 1) & 0x80) > 0));
// }
}