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// Copyright (c) 2009-2017 The Starwels developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include <core_io.h>
#include <primitives/block.h>
#include <primitives/transaction.h>
#include <script/script.h>
#include <serialize.h>
#include <streams.h>
#include <univalue.h>
#include <util.h>
#include <utilstrencodings.h>
#include <version.h>
#include <boost/algorithm/string/classification.hpp>
#include <boost/algorithm/string/predicate.hpp>
#include <boost/algorithm/string/replace.hpp>
#include <boost/algorithm/string/split.hpp>
CScript ParseScript(const std::string& s)
{
CScript result;
static std::map<std::string, opcodetype> mapOpNames;
if (mapOpNames.empty())
{
for (unsigned int op = 0; op <= MAX_OPCODE; op++)
{
// Allow OP_RESERVED to get into mapOpNames
if (op < OP_NOP && op != OP_RESERVED)
continue;
const char* name = GetOpName((opcodetype)op);
if (strcmp(name, "OP_UNKNOWN") == 0)
continue;
std::string strName(name);
mapOpNames[strName] = (opcodetype)op;
// Convenience: OP_ADD and just ADD are both recognized:
boost::algorithm::replace_first(strName, "OP_", "");
mapOpNames[strName] = (opcodetype)op;
}
}
std::vector<std::string> words;
boost::algorithm::split(words, s, boost::algorithm::is_any_of(" \t\n"), boost::algorithm::token_compress_on);
for (std::vector<std::string>::const_iterator w = words.begin(); w != words.end(); ++w)
{
if (w->empty())
{
// Empty string, ignore. (boost::split given '' will return one word)
}
else if (all(*w, boost::algorithm::is_digit()) ||
(boost::algorithm::starts_with(*w, "-") && all(std::string(w->begin()+1, w->end()), boost::algorithm::is_digit())))
{
// Number
int64_t n = atoi64(*w);
result << n;
}
else if (boost::algorithm::starts_with(*w, "0x") && (w->begin()+2 != w->end()) && IsHex(std::string(w->begin()+2, w->end())))
{
// Raw hex data, inserted NOT pushed onto stack:
std::vector<unsigned char> raw = ParseHex(std::string(w->begin()+2, w->end()));
result.insert(result.end(), raw.begin(), raw.end());
}
else if (w->size() >= 2 && boost::algorithm::starts_with(*w, "'") && boost::algorithm::ends_with(*w, "'"))
{
// Single-quoted string, pushed as data. NOTE: this is poor-man's
// parsing, spaces/tabs/newlines in single-quoted strings won't work.
std::vector<unsigned char> value(w->begin()+1, w->end()-1);
result << value;
}
else if (mapOpNames.count(*w))
{
// opcode, e.g. OP_ADD or ADD:
result << mapOpNames[*w];
}
else
{
throw std::runtime_error("script parse error");
}
}
return result;
}
// Check that all of the input and output scripts of a transaction contains valid opcodes
bool CheckTxScriptsSanity(const CMutableTransaction& tx)
{
// Check input scripts for non-coinbase txs
if (!CTransaction(tx).IsCoinBase()) {
for (unsigned int i = 0; i < tx.vin.size(); i++) {
if (!tx.vin[i].scriptSig.HasValidOps() || tx.vin[i].scriptSig.size() > MAX_SCRIPT_SIZE) {
return false;
}
}
}
// Check output scripts
for (unsigned int i = 0; i < tx.vout.size(); i++) {
if (!tx.vout[i].scriptPubKey.HasValidOps() || tx.vout[i].scriptPubKey.size() > MAX_SCRIPT_SIZE) {
return false;
}
}
return true;
}
bool DecodeHexTx(CMutableTransaction& tx, const std::string& hex_tx, bool try_no_witness, bool try_witness)
{
if (!IsHex(hex_tx)) {
return false;
}
std::vector<unsigned char> txData(ParseHex(hex_tx));
if (try_no_witness) {
CDataStream ssData(txData, SER_NETWORK, PROTOCOL_VERSION | SERIALIZE_TRANSACTION_NO_WITNESS);
try {
ssData >> tx;
if (ssData.eof() && (!try_witness || CheckTxScriptsSanity(tx))) {
return true;
}
} catch (const std::exception&) {
// Fall through.
}
}
if (try_witness) {
CDataStream ssData(txData, SER_NETWORK, PROTOCOL_VERSION);
try {
ssData >> tx;
if (ssData.empty()) {
return true;
}
} catch (const std::exception&) {
// Fall through.
}
}
return false;
}
bool DecodeHexBlk(CBlock& block, const std::string& strHexBlk)
{
if (!IsHex(strHexBlk))
return false;
std::vector<unsigned char> blockData(ParseHex(strHexBlk));
CDataStream ssBlock(blockData, SER_NETWORK, PROTOCOL_VERSION);
try {
ssBlock >> block;
}
catch (const std::exception&) {
return false;
}
return true;
}
uint256 ParseHashUV(const UniValue& v, const std::string& strName)
{
std::string strHex;
if (v.isStr())
strHex = v.getValStr();
return ParseHashStr(strHex, strName); // Note: ParseHashStr("") throws a runtime_error
}
uint256 ParseHashStr(const std::string& strHex, const std::string& strName)
{
if (!IsHex(strHex)) // Note: IsHex("") is false
throw std::runtime_error(strName + " must be hexadecimal string (not '" + strHex + "')");
uint256 result;
result.SetHex(strHex);
return result;
}
std::vector<unsigned char> ParseHexUV(const UniValue& v, const std::string& strName)
{
std::string strHex;
if (v.isStr())
strHex = v.getValStr();
if (!IsHex(strHex))
throw std::runtime_error(strName + " must be hexadecimal string (not '" + strHex + "')");
return ParseHex(strHex);
}