/**
* @param $opCode
* @param ScriptStack $mainStack
* @param ScriptStack $vfStack
* @param $fExec
* @throws \BitWasp\Bitcoin\Exceptions\ScriptStackException
* @throws \Exception
*/
public function op($opCode, ScriptStack $mainStack, ScriptStack $vfStack, $fExec)
{
$opCodes = $this->opCodes;
$castToBool = $this->castToBool;
$opName = $opCodes->getOp($opCode);
if ($opName == 'OP_NOP') {
return;
} elseif (in_array($opName, ['OP_IF', 'OP_NOTIF'])) {
// cscriptnum
// <expression> if [statements] [else [statements]] endif
$value = false;
if ($fExec) {
if ($mainStack->size() < 1) {
throw new \Exception('Unbalanced conditional');
}
// todo
$buffer = $mainStack->pop();
$value = $castToBool($buffer);
if ($opCodes->isOp($opCode, 'OP_NOTIF')) {
$value = !$value;
}
}
$vfStack->push($value);
return;
} else {
if ($opName == 'OP_ELSE') {
if ($vfStack->size() == 0) {
throw new \Exception('Unbalanced conditional');
}
$vfStack->set($vfStack->end() - 1, !$vfStack->end());
return;
} else {
if ($opName == 'OP_ENDIF') {
if ($vfStack->size() == 0) {
throw new \Exception('Unbalanced conditional');
}
// todo
return;
} else {
if ($opName == 'OP_VERIFY') {
if ($mainStack->size() < 1) {
throw new \Exception('Invalid stack operation');
}
$value = $castToBool($mainStack->top(-1));
if (!$value) {
throw new \Exception('Error: verify');
}
$mainStack->pop();
return;
} else {
if ($opName == 'OP_RETURN') {
throw new \Exception('Error: OP_RETURN');
}
}
}
}
}
throw new \Exception('Opcode not found');
}
/**
* @param $opCode
* @param ScriptStack $mainStack
* @throws \BitWasp\Bitcoin\Exceptions\ScriptStackException
* @throws \Exception
*/
public function op($opCode, ScriptStack $mainStack)
{
if ($mainStack->size() < 1) {
throw new \Exception('Invalid stack operation');
}
$opCodes = $this->opCodes;
$opName = $opCodes->getOp($opCode);
$buffer = $mainStack->top(-1);
if ($opCodes->cmp($opCode, 'OP_RIPEMD160') >= 0 && $opCodes->cmp($opCode, 'OP_HASH256') <= 0) {
if ($opName == 'OP_RIPEMD160') {
$hash = Hash::ripemd160($buffer);
} elseif ($opName == 'OP_SHA1') {
$hash = Hash::sha1($buffer);
} elseif ($opName == 'OP_SHA256') {
$hash = Hash::sha256($buffer);
} elseif ($opName == 'OP_HASH160') {
$hash = Hash::sha256ripe160($buffer);
} else {
// is hash256
$hash = Hash::sha256d($buffer);
}
$mainStack->pop();
$mainStack->push($hash);
} else {
throw new \Exception('Opcode not found');
}
}
/**
* @param $opCode
* @param ScriptStack $mainStack
* @param ScriptStack $altStack
* @throws \BitWasp\Bitcoin\Exceptions\ScriptStackException
* @throws \Exception
*/
public function op($opCode, ScriptStack $mainStack, ScriptStack $altStack)
{
$opCodes = $this->opCodes;
$opName = $this->opCodes->getOp($opCode);
$castToBool = $this->castToBool;
if ($opName == 'OP_TOALTSTACK') {
if ($mainStack->size() < 1) {
throw new \Exception('Invalid stack operation OP_TOALTSTACK');
}
$altStack->push($mainStack->pop());
return;
} else {
if ($opName == 'OP_FROMALTSTACK') {
if ($altStack->size() < 1) {
throw new \Exception('Invalid alt-stack operation OP_FROMALTSTACK');
}
$mainStack->push($altStack->pop());
return;
} else {
if ($opName == 'OP_IFDUP') {
// If top value not zero, duplicate it.
if ($mainStack->size() < 1) {
throw new \Exception('Invalid stack operation OP_IFDUP');
}
$vch = $mainStack->top(-1);
if ($castToBool($vch)) {
$mainStack->push($vch);
}
return;
} else {
if ($opName == 'OP_DEPTH') {
$num = $mainStack->size();
$bin = Buffer::hex($this->math->decHex($num));
$mainStack->push($bin);
return;
} else {
if ($opName == 'OP_DROP') {
if ($mainStack->size() < 1) {
throw new \Exception('Invalid stack operation OP_DROP');
}
$mainStack->pop();
return;
} else {
if ($opName == 'OP_DUP') {
if ($mainStack->size() < 1) {
throw new \Exception('Invalid stack operation OP_DUP');
}
$vch = $mainStack->top(-1);
$mainStack->push($vch);
return;
} else {
if ($opName == 'OP_NIP') {
if ($mainStack->size() < 2) {
throw new \Exception('Invalid stack operation OP_NIP');
}
$mainStack->erase(-2);
return;
} else {
if ($opName == 'OP_OVER') {
if ($mainStack->size() < 2) {
throw new \Exception('Invalid stack operation OP_OVER');
}
$vch = $mainStack->top(-2);
$mainStack->push($vch);
return;
} else {
if (in_array($opName, ['OP_PICK', 'OP_ROLL'])) {
// cscriptnum
if ($mainStack->size() < 2) {
throw new \Exception('Invalid stack operation OP_PICK');
}
$n = $mainStack->top(-1)->getInt();
$mainStack->pop();
if ($this->math->cmp($n, 0) < 0 || $this->math->cmp($n, $mainStack->size()) >= 0) {
throw new \Exception('Invalid stack operation OP_PICK');
}
$pos = $this->math->sub($this->math->sub(0, $n), 1);
$vch = $mainStack->top($pos);
if ($opCodes->isOp($opCode, 'OP_ROLL')) {
$mainStack->erase($pos);
}
$mainStack->push($vch);
return;
} else {
if ($opName == 'OP_ROT') {
if ($mainStack->size() < 3) {
throw new \Exception('Invalid stack operation OP_ROT');
}
$mainStack->swap(-3, -2);
$mainStack->swap(-2, -1);
return;
} else {
if ($opName == 'OP_SWAP') {
if ($mainStack->size() < 2) {
throw new \Exception('Invalid stack operation OP_SWAP');
}
$mainStack->swap(-2, -1);
return;
} else {
if ($opName == 'OP_TUCK') {
if ($mainStack->size() < 2) {
throw new \Exception('Invalid stack operation OP_TUCK');
}
$vch = $mainStack->top(-1);
$mainStack->insert($mainStack->end() - 2, $vch);
return;
} else {
if ($opName == 'OP_2DROP') {
if ($mainStack->size() < 2) {
throw new \Exception('Invalid stack operation OP_2DROP');
}
$mainStack->pop();
$mainStack->pop();
return;
} else {
if ($opName == 'OP_2DUP') {
if ($mainStack->size() < 2) {
throw new \Exception('Invalid stack operation OP_2DUP');
}
$string1 = $mainStack->top(-2);
$string2 = $mainStack->top(-1);
$mainStack->push($string1);
$mainStack->push($string2);
return;
} else {
if ($opName == 'OP_3DUP') {
if ($mainStack->size() < 3) {
throw new \Exception('Invalid stack operation OP_3DUP');
}
$string1 = $mainStack->top(-3);
$string2 = $mainStack->top(-2);
$string3 = $mainStack->top(-1);
$mainStack->push($string1);
$mainStack->push($string2);
$mainStack->push($string3);
return;
} else {
if ($opName == 'OP_2OVER') {
if ($mainStack->size() < 4) {
throw new \Exception('Invalid stack operation OP_2OVER');
}
$string1 = $mainStack->top(-4);
$string2 = $mainStack->top(-3);
$mainStack->push($string1);
$mainStack->push($string2);
return;
} else {
if ($opName == 'OP_2ROT') {
if ($mainStack->size() < 6) {
throw new \Exception('Invalid stack operation OP_2ROT');
}
$string1 = $mainStack->top(-6);
$string2 = $mainStack->top(-5);
$mainStack->erase(-6);
$mainStack->erase(-5);
$mainStack->push($string1);
$mainStack->push($string2);
return;
} else {
if ($opName == 'OP_2SWAP') {
if ($mainStack->size() < 4) {
throw new \Exception('Invalid stack operation OP_2SWAP');
}
$mainStack->swap(-3, -1);
$mainStack->swap(-4, -2);
return;
}
}
}
}
}
}
}
}
}
}
}
}
}
}
}
}
}
}
throw new \Exception('Opcode not found');
}
/**
* @param $opCode
* @param ScriptStack $mainStack
* @throws \BitWasp\Bitcoin\Exceptions\ScriptStackException
* @throws \Exception
*/
private function threeValueCases($opCode, ScriptStack $mainStack)
{
$opName = $this->opCodes->getOp($opCode);
$math = $this->math;
if ($opName == 'OP_WITHIN') {
//cscriptnum
if ($mainStack->size() < 3) {
throw new \Exception('Invalid stack operation');
}
$num1 = $mainStack->top(-3)->getInt();
$num2 = $mainStack->top(-2)->getInt();
$num3 = $mainStack->top(-1)->getInt();
$value = $math->cmp($num2, $num1) <= 0 && $math->cmp($num1, $num3) < 0;
$mainStack->pop();
$mainStack->pop();
$mainStack->pop();
$mainStack->push($value ? $this->_bn1 : $this->_bn0);
return;
}
throw new \Exception('Opcode not found');
}