path: root/solidityExecutionFramework.h

/*
    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/>.
*/
/**
 * @author Christian <c@ethdev.com>
 * @date 2014
 * Framework for executing Solidity contracts and testing them against C++ implementation.
 */

#pragma once

#include <string>
#include <tuple>
#include <boost/test/unit_test.hpp>
#include <libethereum/State.h>
#include <libethereum/Executive.h>
#include <libsolidity/CompilerStack.h>

namespace dev
{
/// Provides additional overloads for toBigEndian to encode arguments and return values.
inline bytes toBigEndian(byte _value) { return bytes({_value}); }
inline bytes toBigEndian(bool _value) { return bytes({byte(_value)}); }

namespace solidity
{
namespace test
{

class ExecutionFramework
{
public:
    ExecutionFramework() { g_logVerbosity = 0; }

    bytes const& compileAndRun(std::string const& _sourceCode, u256 const& _value = 0, std::string const& _contractName = "")
    {
        dev::solidity::CompilerStack compiler;
        compiler.compile(_sourceCode, m_optimize);
        bytes code = compiler.getBytecode(_contractName);
        sendMessage(code, true, _value);
        BOOST_REQUIRE(!m_output.empty());
        return m_output;
    }

    bytes const& callContractFunction(byte _index, bytes const& _data = bytes(), u256 const& _value = 0)
    {
        sendMessage(bytes(1, _index) + _data, false, _value);
        return m_output;
    }

    template <class... Args>
    bytes const& callContractFunction(byte _index, Args const&... _arguments)
    {
        return callContractFunction(_index, argsToBigEndian(_arguments...));
    }

    template <class CppFunction, class... Args>
    void testSolidityAgainstCpp(byte _index, CppFunction const& _cppFunction, Args const&... _arguments)
    {
        bytes solidityResult = callContractFunction(_index, _arguments...);
        bytes cppResult = callCppAndEncodeResult(_cppFunction, _arguments...);
        BOOST_CHECK_MESSAGE(solidityResult == cppResult, "Computed values do not match."
                            "\nSolidity: " + toHex(solidityResult) + "\nC++:      " + toHex(cppResult));
    }

    template <class CppFunction, class... Args>
    void testSolidityAgainstCppOnRange(byte _index, CppFunction const& _cppFunction,
                                       u256 const& _rangeStart, u256 const& _rangeEnd)
    {
        for (u256 argument = _rangeStart; argument < _rangeEnd; ++argument)
        {
            bytes solidityResult = callContractFunction(_index, argument);
            bytes cppResult = callCppAndEncodeResult(_cppFunction, argument);
            BOOST_CHECK_MESSAGE(solidityResult == cppResult, "Computed values do not match."
                                "\nSolidity: " + toHex(solidityResult) + "\nC++:      " + toHex(cppResult) +
                                "\nArgument: " + toHex(toBigEndian(argument)));
        }
    }

private:
    template <class FirstArg, class... Args>
    bytes argsToBigEndian(FirstArg const& _firstArg, Args const&... _followingArgs) const
    {
        return toBigEndian(_firstArg) + argsToBigEndian(_followingArgs...);
    }

    bytes argsToBigEndian() const { return bytes(); }

    template <class CppFunction, class... Args>
    auto callCppAndEncodeResult(CppFunction const& _cppFunction, Args const&... _arguments)
    -> typename std::enable_if<std::is_void<decltype(_cppFunction(_arguments...))>::value, bytes>::type
    {
        _cppFunction(_arguments...);
        return bytes();
    }
    template <class CppFunction, class... Args>
    auto callCppAndEncodeResult(CppFunction const& _cppFunction, Args const&... _arguments)
    -> typename std::enable_if<!std::is_void<decltype(_cppFunction(_arguments...))>::value, bytes>::type
    {
        return toBigEndian(_cppFunction(_arguments...));
    }

    void sendMessage(bytes const& _data, bool _isCreation, u256 const& _value = 0)
    {
        m_state.addBalance(m_sender, _value); // just in case
        eth::Executive executive(m_state);
        eth::Transaction t = _isCreation ? eth::Transaction(_value, m_gasPrice, m_gas, _data, 0, KeyPair::create().sec())
                                         : eth::Transaction(_value, m_gasPrice, m_gas, m_contractAddress, _data, 0, KeyPair::create().sec());
        bytes transactionRLP = t.rlp();
        try
        {
            // this will throw since the transaction is invalid, but it should nevertheless store the transaction
            executive.setup(&transactionRLP);
        }
        catch (...) {}
        if (_isCreation)
        {
            BOOST_REQUIRE(!executive.create(m_sender, _value, m_gasPrice, m_gas, &_data, m_sender));
            m_contractAddress = executive.newAddress();
            BOOST_REQUIRE(m_contractAddress);
            BOOST_REQUIRE(m_state.addressHasCode(m_contractAddress));
        }
        else
        {
            BOOST_REQUIRE(m_state.addressHasCode(m_contractAddress));
            BOOST_REQUIRE(!executive.call(m_contractAddress, m_sender, _value, m_gasPrice, &_data, m_gas, m_sender));
        }
        BOOST_REQUIRE(executive.go());
        m_state.noteSending(m_sender);
        executive.finalize();
        m_output = executive.out().toVector();
    }

protected:
    bool m_optimize = false;
    Address m_sender;
    Address m_contractAddress;
    eth::State m_state;
    u256 const m_gasPrice = 100 * eth::szabo;
    u256 const m_gas = 1000000;
    bytes m_output;
};

}
}
} // end namespaces