path: root/test/ExecutionFramework.h

/*
    This file is part of solidity.

    solidity 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.

    solidity 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 solidity.  If not, see <http://www.gnu.org/licenses/>.
*/
/**
 * @author Christian <c@ethdev.com>
 * @date 2014
 * Framework for executing contracts and testing them using RPC.
 */

#pragma once

#include <test/Options.h>
#include <test/RPCSession.h>

#include <libsolidity/interface/EVMVersion.h>

#include <libdevcore/FixedHash.h>
#include <libdevcore/SHA3.h>

#include <functional>

namespace dev
{
namespace test
{
    using rational = boost::rational<dev::bigint>;
    /// An Ethereum address: 20 bytes.
    /// @NOTE This is not endian-specific; it's just a bunch of bytes.
    using Address = h160;

    // The various denominations; here for ease of use where needed within code.
    static const u256 wei = 1;
    static const u256 shannon = u256("1000000000");
    static const u256 szabo = shannon * 1000;
    static const u256 finney = szabo * 1000;
    static const u256 ether = finney * 1000;

class ExecutionFramework
{

public:
    ExecutionFramework();
    virtual ~ExecutionFramework() = default;

    virtual bytes const& compileAndRunWithoutCheck(
        std::string const& _sourceCode,
        u256 const& _value = 0,
        std::string const& _contractName = "",
        bytes const& _arguments = bytes(),
        std::map<std::string, Address> const& _libraryAddresses = std::map<std::string, Address>()
    ) = 0;

    bytes const& compileAndRun(
        std::string const& _sourceCode,
        u256 const& _value = 0,
        std::string const& _contractName = "",
        bytes const& _arguments = bytes(),
        std::map<std::string, Address> const& _libraryAddresses = std::map<std::string, Address>()
    )
    {
        compileAndRunWithoutCheck(_sourceCode, _value, _contractName, _arguments, _libraryAddresses);
        BOOST_REQUIRE(!m_output.empty());
        return m_output;
    }

    bytes const& callFallbackWithValue(u256 const& _value)
    {
        sendMessage(bytes(), false, _value);
        return m_output;
    }

    bytes const & callFallback()
    {
        return callFallbackWithValue(0);
    }

    bytes const& callContractFunctionWithValueNoEncoding(std::string _sig, u256 const& _value, bytes const& _arguments)
    {
        FixedHash<4> hash(dev::keccak256(_sig));
        sendMessage(hash.asBytes() + _arguments, false, _value);
        return m_output;
    }

    bytes const& callContractFunctionNoEncoding(std::string _sig, bytes const& _arguments)
    {
        return callContractFunctionWithValueNoEncoding(_sig, 0, _arguments);
    }

    template <class... Args>
    bytes const& callContractFunctionWithValue(std::string _sig, u256 const& _value, Args const&... _arguments)
    {
        return callContractFunctionWithValueNoEncoding(_sig, _value, encodeArgs(_arguments...));
    }

    template <class... Args>
    bytes const& callContractFunction(std::string _sig, Args const&... _arguments)
    {
        return callContractFunctionWithValue(_sig, 0, _arguments...);
    }

    template <class CppFunction, class... Args>
    void testContractAgainstCpp(std::string _sig, CppFunction const& _cppFunction, Args const&... _arguments)
    {
        bytes contractResult = callContractFunction(_sig, _arguments...);
        bytes cppResult = callCppAndEncodeResult(_cppFunction, _arguments...);
        BOOST_CHECK_MESSAGE(
            contractResult == cppResult,
            "Computed values do not match.\nContract: " +
                toHex(contractResult) +
                "\nC++:      " +
                toHex(cppResult)
        );
    }

    template <class CppFunction, class... Args>
    void testContractAgainstCppOnRange(std::string _sig, CppFunction const& _cppFunction, u256 const& _rangeStart, u256 const& _rangeEnd)
    {
        for (u256 argument = _rangeStart; argument < _rangeEnd; ++argument)
        {
            bytes contractResult = callContractFunction(_sig, argument);
            bytes cppResult = callCppAndEncodeResult(_cppFunction, argument);
            BOOST_CHECK_MESSAGE(
                contractResult == cppResult,
                "Computed values do not match.\nContract: " +
                    toHex(contractResult) +
                    "\nC++:      " +
                    toHex(cppResult) +
                    "\nArgument: " +
                    toHex(encode(argument))
            );
        }
    }

    static std::pair<bool, std::string> compareAndCreateMessage(bytes const& _result, bytes const& _expectation);

    static bytes encode(bool _value) { return encode(byte(_value)); }
    static bytes encode(int _value) { return encode(u256(_value)); }
    static bytes encode(size_t _value) { return encode(u256(_value)); }
    static bytes encode(char const* _value) { return encode(std::string(_value)); }
    static bytes encode(byte _value) { return bytes(31, 0) + bytes{_value}; }
    static bytes encode(u256 const& _value) { return toBigEndian(_value); }
    /// @returns the fixed-point encoding of a rational number with a given
    /// number of fractional bits.
    static bytes encode(std::pair<rational, int> const& _valueAndPrecision)
    {
        rational const& value = _valueAndPrecision.first;
        int fractionalBits = _valueAndPrecision.second;
        return encode(u256((value.numerator() << fractionalBits) / value.denominator()));
    }
    static bytes encode(h256 const& _value) { return _value.asBytes(); }
    static bytes encode(bytes const& _value, bool _padLeft = true)
    {
        bytes padding = bytes((32 - _value.size() % 32) % 32, 0);
        return _padLeft ? padding + _value : _value + padding;
    }
    static bytes encode(std::string const& _value) { return encode(asBytes(_value), false); }
    template <class _T>
    static bytes encode(std::vector<_T> const& _value)
    {
        bytes ret;
        for (auto const& v: _value)
            ret += encode(v);
        return ret;
    }

    template <class FirstArg, class... Args>
    static bytes encodeArgs(FirstArg const& _firstArg, Args const&... _followingArgs)
    {
        return encode(_firstArg) + encodeArgs(_followingArgs...);
    }
    static bytes encodeArgs()
    {
        return bytes();
    }

    //@todo might be extended in the future
    template <class Arg>
    static bytes encodeDyn(Arg const& _arg)
    {
        return encodeArgs(u256(0x20), u256(_arg.size()), _arg);
    }

private:
    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 encode(_cppFunction(_arguments...));
    }

protected:
    void sendMessage(bytes const& _data, bool _isCreation, u256 const& _value = 0);
    void sendEther(Address const& _to, u256 const& _value);
    size_t currentTimestamp();
    size_t blockTimestamp(u256 _number);

    /// @returns the (potentially newly created) _ith address.
    Address account(size_t _i);

    u256 balanceAt(Address const& _addr);
    bool storageEmpty(Address const& _addr);
    bool addressHasCode(Address const& _addr);

    RPCSession& m_rpc;

    struct LogEntry
    {
        Address address;
        std::vector<h256> topics;
        bytes data;
    };

    solidity::EVMVersion m_evmVersion;
    unsigned m_optimizeRuns = 200;
    bool m_optimize = false;
    bool m_showMessages = false;
    Address m_sender;
    Address m_contractAddress;
    u256 m_blockNumber;
    u256 const m_gasPrice = 100 * szabo;
    u256 const m_gas = 100000000;
    bytes m_output;
    std::vector<LogEntry> m_logs;
    u256 m_gasUsed;
};

#define ABI_CHECK(result, expectation) do { \
    auto abiCheckResult = ExecutionFramework::compareAndCreateMessage((result), (expectation)); \
    BOOST_CHECK_MESSAGE(abiCheckResult.first, abiCheckResult.second); \
} while (0)


}
} // end namespaces