path: root/test/RPCSession.cpp

/*
    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/>.

    The Implementation originally from https://msdn.microsoft.com/en-us/library/windows/desktop/aa365592(v=vs.85).aspx
*/
/** @file RPCSession.cpp
 * @author Dimtiry Khokhlov <dimitry@ethdev.com>
 * @date 2016
 */

#include <string>
#include <stdio.h>
#include <thread>
#include <libdevcore/CommonData.h>
#include <json/reader.h>
#include <json/writer.h>
#include "RPCSession.h"

using namespace std;
using namespace dev;

IPCSocket::IPCSocket(string const& _path): m_path(_path)
{
#if defined(_WIN32)
    m_socket = CreateFile(
        m_path.c_str(),   // pipe name
        GENERIC_READ |  // read and write access
        GENERIC_WRITE,
        0,              // no sharing
        NULL,           // default security attribute
        OPEN_EXISTING,  // opens existing pipe
        0,              // default attributes
        NULL);          // no template file

    if (m_socket == INVALID_HANDLE_VALUE)
        BOOST_FAIL("Error creating IPC socket object");

#else
    if (_path.length() >= sizeof(sockaddr_un::sun_path))
        BOOST_FAIL("Error opening IPC: socket path is too long!");

    struct sockaddr_un saun;
    memset(&saun, 0, sizeof(sockaddr_un));
    saun.sun_family = AF_UNIX;
    strcpy(saun.sun_path, _path.c_str());

// http://idletechnology.blogspot.ca/2011/12/unix-domain-sockets-on-osx.html
//
// SUN_LEN() might be optimal, but it seemingly affects the portability,
// with at least Android missing this macro.  Just using the sizeof() for
// structure seemingly works, and would only have the side-effect of
// sending larger-than-required packets over the socket.  Given that this
// code is only used for unit-tests, that approach seems simpler.
#if defined(__APPLE__)
    saun.sun_len = sizeof(struct sockaddr_un);
#endif //  defined(__APPLE__)

    if ((m_socket = socket(AF_UNIX, SOCK_STREAM, 0)) < 0)
        BOOST_FAIL("Error creating IPC socket object");

    if (connect(m_socket, reinterpret_cast<struct sockaddr const*>(&saun), sizeof(struct sockaddr_un)) < 0)
        BOOST_FAIL("Error connecting to IPC socket: " << _path);

    m_fp = fdopen(m_socket, "r");
#endif
}

string IPCSocket::sendRequest(string const& _req)
{
#if defined(_WIN32)
    string returnStr;
    DWORD cbWritten;
    BOOL fSuccess = WriteFile(
        m_socket,               // pipe handle
        _req.c_str(),           // message
        _req.size(),            // message length
        &cbWritten,             // bytes written
        NULL);                  // not overlapped

    if (!fSuccess)
        BOOST_FAIL("WriteFile to pipe failed");

    DWORD  cbRead;
    TCHAR  chBuf[c_buffsize];

    // Read from the pipe.
    fSuccess = ReadFile(
        m_socket,  // pipe handle
        chBuf,     // buffer to receive reply
        c_buffsize,// size of buffer
        &cbRead,   // number of bytes read
        NULL);     // not overlapped

    returnStr += chBuf;

    if (!fSuccess)
        BOOST_FAIL("ReadFile from pipe failed");

    cerr << ".";  //Output for log activity
    return returnStr;
#else
    send(m_socket, _req.c_str(), _req.length(), 0);

    char c;
    string response;
    while ((c = fgetc(m_fp)) != EOF)
    {
        if (c != '\n')
            response += c;
        else
            break;
    }
    return response;
#endif
}

RPCSession& RPCSession::instance(const string& _path)
{
    static RPCSession session(_path);
    BOOST_REQUIRE_EQUAL(session.m_ipcSocket.path(), _path);
    return session;
}

string RPCSession::eth_getCode(string const& _address, string const& _blockNumber)
{
    return rpcCall("eth_getCode", { quote(_address), quote(_blockNumber) }).asString();
}

RPCSession::TransactionReceipt RPCSession::eth_getTransactionReceipt(string const& _transactionHash)
{
    TransactionReceipt receipt;
    Json::Value const result = rpcCall("eth_getTransactionReceipt", { quote(_transactionHash) });
    BOOST_REQUIRE(!result.isNull());
    receipt.gasUsed = result["gasUsed"].asString();
    receipt.contractAddress = result["contractAddress"].asString();
    for (auto const& log: result["logs"])
    {
        LogEntry entry;
        entry.address = log["address"].asString();
        entry.data = log["data"].asString();
        for (auto const& topic: log["topics"])
            entry.topics.push_back(topic.asString());
        receipt.logEntries.push_back(entry);
    }
    return receipt;
}

string RPCSession::eth_sendTransaction(TransactionData const& _td)
{
    return rpcCall("eth_sendTransaction", { _td.toJson() }).asString();
}

string RPCSession::eth_call(TransactionData const& _td, string const& _blockNumber)
{
    return rpcCall("eth_call", { _td.toJson(), quote(_blockNumber) }).asString();
}

string RPCSession::eth_sendTransaction(string const& _transaction)
{
    return rpcCall("eth_sendTransaction", { _transaction }).asString();
}

string RPCSession::eth_getBalance(string const& _address, string const& _blockNumber)
{
    string address = (_address.length() == 20) ? "0x" + _address : _address;
    return rpcCall("eth_getBalance", { quote(address), quote(_blockNumber) }).asString();
}

string RPCSession::eth_getStorageRoot(string const& _address, string const& _blockNumber)
{
    string address = (_address.length() == 20) ? "0x" + _address : _address;
    return rpcCall("eth_getStorageRoot", { quote(address), quote(_blockNumber) }).asString();
}

void RPCSession::personal_unlockAccount(string const& _address, string const& _password, int _duration)
{
    rpcCall("personal_unlockAccount", { quote(_address), quote(_password), to_string(_duration) });
}

string RPCSession::personal_newAccount(string const& _password)
{
    return rpcCall("personal_newAccount", { quote(_password) }).asString();
}

void RPCSession::test_setChainParams(vector<string> const& _accounts)
{
    static std::string const c_configString = R"(
    {
        "sealEngine": "NoProof",
        "params": {
            "accountStartNonce": "0x",
            "maximumExtraDataSize": "0x1000000",
            "blockReward": "0x",
            "allowFutureBlocks": "1"
        },
        "genesis": {
            "author": "0000000000000010000000000000000000000000",
            "timestamp": "0x00",
            "parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
            "extraData": "0x",
            "gasLimit": "0x1000000000000"
        },
        "accounts": {
            "0000000000000000000000000000000000000001": { "wei": "1", "precompiled": { "name": "ecrecover", "linear": { "base": 3000, "word": 0 } } },
            "0000000000000000000000000000000000000002": { "wei": "1", "precompiled": { "name": "sha256", "linear": { "base": 60, "word": 12 } } },
            "0000000000000000000000000000000000000003": { "wei": "1", "precompiled": { "name": "ripemd160", "linear": { "base": 600, "word": 120 } } },
            "0000000000000000000000000000000000000004": { "wei": "1", "precompiled": { "name": "identity", "linear": { "base": 15, "word": 3 } } }
        }
    }
    )";

    Json::Value config;
    BOOST_REQUIRE(Json::Reader().parse(c_configString, config));
    for (auto const& account: _accounts)
        config["accounts"][account]["wei"] = "0x100000000000000000000000000000000000000000";
    test_setChainParams(Json::FastWriter().write(config));
}

void RPCSession::test_setChainParams(string const& _config)
{
    rpcCall("test_setChainParams", { _config });
}

void RPCSession::test_rewindToBlock(size_t _blockNr)
{
    rpcCall("test_rewindToBlock", { to_string(_blockNr) });
}

void RPCSession::test_mineBlocks(int _number)
{
    u256 startBlock = fromBigEndian<u256>(fromHex(rpcCall("eth_blockNumber").asString()));
    rpcCall("test_mineBlocks", { to_string(_number) }, true);

    bool mined = false;

    // We auto-calibrate the time it takes to mine the transaction.
    // It would be better to go without polling, but that would probably need a change to the test client

    unsigned sleepTime = m_sleepTime;
    size_t polls = 0;
    for (; polls < 10 && !mined; ++polls)
    {
        std::this_thread::sleep_for(chrono::milliseconds(sleepTime));
        if (fromBigEndian<u256>(fromHex(rpcCall("eth_blockNumber").asString())) >= startBlock + _number)
            mined = true;
        else
            sleepTime *= 2;
    }
    if (polls > 1)
    {
        m_successfulMineRuns = 0;
        m_sleepTime += 2;
    }
    else if (polls == 1)
    {
        m_successfulMineRuns++;
        if (m_successfulMineRuns > 5)
        {
            m_successfulMineRuns = 0;
            m_sleepTime--;
        }
    }

    if (!mined)
        BOOST_FAIL("Error in test_mineBlocks: block mining timeout!");
}

void RPCSession::test_modifyTimestamp(size_t _timestamp)
{
    rpcCall("test_modifyTimestamp", { to_string(_timestamp) });
}

Json::Value RPCSession::rpcCall(string const& _methodName, vector<string> const& _args, bool _canFail)
{
    string request = "{\"jsonrpc\":\"2.0\",\"method\":\"" + _methodName + "\",\"params\":[";
    for (size_t i = 0; i < _args.size(); ++i)
    {
        request += _args[i];
        if (i + 1 != _args.size())
            request += ", ";
    }

    request += "],\"id\":" + to_string(m_rpcSequence) + "}";
    ++m_rpcSequence;

    //cout << "Request: " << request << endl;
    string reply = m_ipcSocket.sendRequest(request);
    //cout << "Reply: " << reply << endl;

    Json::Value result;
    Json::Reader().parse(reply, result, false);

    if (result.isMember("error"))
    {
        if (_canFail)
            return Json::Value();

        BOOST_FAIL("Error on JSON-RPC call: " + result["error"]["message"].asString());
    }
    return result["result"];
}

string const& RPCSession::accountCreateIfNotExists(size_t _id)
{
    if (_id >= m_accounts.size())
    {
        m_accounts.push_back(personal_newAccount(""));
        personal_unlockAccount(m_accounts.back(), "", 100000);
    }
    return m_accounts[_id];
}

RPCSession::RPCSession(const string& _path):
    m_ipcSocket(_path)
{
    string account = personal_newAccount("");
    personal_unlockAccount(account, "", 100000);
    m_accounts.push_back(account);
    test_setChainParams(m_accounts);
}

string RPCSession::TransactionData::toJson() const
{
    Json::Value json;
    json["from"] = (from.length() == 20) ? "0x" + from : from;
    json["to"] = (to.length() == 20 || to == "") ? "0x" + to :  to;
    json["gas"] = gas;
    json["gasprice"] = gasPrice;
    json["value"] = value;
    json["data"] = data;
    return Json::FastWriter().write(json);

}