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/*
This file is part of cpp-ethereum.
cpp-ethereum is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
cpp-ethereum is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with cpp-ethereum. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file CommonJS.h
* @authors:
* Gav Wood <i@gavwood.com>
* Marek Kotewicz <marek@ethdev.com>
* @date 2014
*/
#pragma once
#include <string>
#include <libethereum/Interface.h>
#include "Common.h"
#include "CommonData.h"
namespace dev
{
template <unsigned S> std::string toJS(FixedHash<S> const& _h)
{
return "0x" + toHex(_h.ref());
}
template <unsigned N> std::string toJS(boost::multiprecision::number<boost::multiprecision::cpp_int_backend<N, N, boost::multiprecision::unsigned_magnitude, boost::multiprecision::unchecked, void>> const& _n)
{
return "0x" + toHex(toCompactBigEndian(_n));
}
inline std::string toJS(dev::bytes const& _n)
{
return "0x" + dev::toHex(_n);
}
/// Convert string to byte array. Input parameters can be hex or dec. Returns empty array if invalid input e.g neither dec or hex.
bytes jsToBytes(std::string const& _s);
/// Add '0' on the head of _b until _l.
bytes padded(bytes _b, unsigned _l);
/// Removing all trailing '0'. Returns empty array if input contains only '0' char.
bytes unpadded(bytes _s);
/// Remove all '0' on the head of _s. Returns 0 if _s contains only '0'.
std::string unpadLeft(std::string _s);
/// Convert u256 into user-readable string. Returns int/hex value of 64 bits int, hex of 160 bits FixedHash. As a fallback try to handle input as h256.
std::string prettyU256(u256 _n);
/// Convert h256 into user-readable string (by directly using std::string constructor).
std::string fromRaw(h256 _n, unsigned* _inc = nullptr);
/// Convert string to Address (h160), returns empty address if (_a.size != 40).
Address fromString(std::string const& _a);
template <unsigned N> FixedHash<N> jsToFixed(std::string const& _s)
{
if (_s.substr(0, 2) == "0x")
// Hex
return FixedHash<N>(_s.substr(2 + std::max<unsigned>(40, _s.size() - 2) - 40));
else if (_s.find_first_not_of("0123456789") == std::string::npos)
// Decimal
return (typename FixedHash<N>::Arith)(_s);
else
// Binary
return FixedHash<N>(); // FAIL
}
inline std::string jsToFixed(double _s)
{
return toJS(dev::u256(_s * (double)(dev::u256(1) << 128)));
}
template <unsigned N> boost::multiprecision::number<boost::multiprecision::cpp_int_backend<N * 8, N * 8, boost::multiprecision::unsigned_magnitude, boost::multiprecision::unchecked, void>> jsToInt(std::string const& _s)
{
if (_s.substr(0, 2) == "0x")
// Hex
return fromBigEndian<boost::multiprecision::number<boost::multiprecision::cpp_int_backend<N * 8, N * 8, boost::multiprecision::unsigned_magnitude, boost::multiprecision::unchecked, void>>>(fromHex(_s.substr(2)));
else if (_s.find_first_not_of("0123456789") == std::string::npos)
// Decimal
return boost::multiprecision::number<boost::multiprecision::cpp_int_backend<N * 8, N * 8, boost::multiprecision::unsigned_magnitude, boost::multiprecision::unchecked, void>>(_s);
else
// Binary
return 0; // FAIL
}
inline Address jsToAddress(std::string const& _s) { return jsToFixed<sizeof(dev::Address)>(_s); }
inline Public jsToPublic(std::string const& _s) { return jsToFixed<sizeof(dev::Public)>(_s); }
inline Secret jsToSecret(std::string const& _s) { return jsToFixed<sizeof(dev::Secret)>(_s); }
inline u256 jsToU256(std::string const& _s) { return jsToInt<32>(_s); }
inline std::string jsToBinary(std::string const& _s)
{
return dev::toString(unpadded(jsToBytes(_s)));
}
inline std::string jsToDecimal(std::string const& _s)
{
return dev::toString(jsToU256(_s));
}
inline std::string jsFromBinary(dev::bytes _s, unsigned _padding = 32)
{
_s.resize(std::max<unsigned>(_s.size(), _padding));
return "0x" + dev::toHex(_s);
}
inline std::string jsFromBinary(std::string const& _s, unsigned _padding = 32)
{
return jsFromBinary(asBytes(_s), _padding);
}
inline double jsFromFixed(std::string const& _s)
{
return (double)jsToU256(_s) / (double)(dev::u256(1) << 128);
}
struct TransactionSkeleton
{
Address from;
Address to;
u256 value;
bytes data;
u256 gas;
u256 gasPrice;
};
}