Config.h

//------------------------------------------------------------------------------
/*
    This file is part of rippled: https://github.com/ripple/rippled
    Copyright (c) 2012, 2013 Ripple Labs Inc.

    Permission to use, copy, modify, and/or distribute this software for any
    purpose  with  or without fee is hereby granted, provided that the above
    copyright notice and this permission notice appear in all copies.

    THE  SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
    WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES  OF
    MERCHANTABILITY  AND  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
    ANY  SPECIAL ,  DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
    WHATSOEVER  RESULTING  FROM  LOSS  OF USE, DATA OR PROFITS, WHETHER IN AN
    ACTION  OF  CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
//==============================================================================

#ifndef RIPPLE_CORE_CONFIG_H_INCLUDED
#define RIPPLE_CORE_CONFIG_H_INCLUDED

#include <ripple/basics/BasicConfig.h>
#include <ripple/basics/FeeUnits.h>
#include <ripple/basics/base_uint.h>
#include <ripple/beast/net/IPEndpoint.h>
#include <ripple/beast/utility/Journal.h>
#include <ripple/protocol/SystemParameters.h>  // VFALCO Breaks levelization
#include <boost/beast/core/string.hpp>
#include <boost/filesystem.hpp>  // VFALCO FIX: This include should not be here
#include <boost/lexical_cast.hpp>
#include <boost/optional.hpp>
#include <algorithm>
#include <chrono>
#include <cstdint>
#include <map>
#include <string>
#include <type_traits>
#include <unordered_set>
#include <vector>

namespace ripple {

class Rules;

//------------------------------------------------------------------------------

enum class SizedItem : std::size_t {
    sweepInterval = 0,
    treeCacheSize,
    treeCacheAge,
    ledgerSize,
    ledgerAge,
    ledgerFetch,
    nodeCacheSize,
    nodeCacheAge,
    hashNodeDBCache,
    txnDBCache,
    lgrDBCache
};

//  This entire derived class is deprecated.
//  For new config information use the style implied
//  in the base class. For existing config information
//  try to refactor code to use the new style.
//
class Config : public BasicConfig
{
public:
    // Settings related to the configuration file location and directories
    static char const* const configFileName;
    static char const* const databaseDirName;
    static char const* const validatorsFileName;

    /** Returns the full path and filename of the debug log file. */
    boost::filesystem::path
    getDebugLogFile() const;

private:
    boost::filesystem::path CONFIG_FILE;

public:
    boost::filesystem::path CONFIG_DIR;

private:
    boost::filesystem::path DEBUG_LOGFILE;

    void
    load();
    beast::Journal const j_;

    bool QUIET = false;   // Minimize logging verbosity.
    bool SILENT = false;  // No output to console after startup.
    /** Operate in stand-alone mode.

        In stand alone mode:

        - Peer connections are not attempted or accepted
        - The ledger is not advanced automatically.
        - If no ledger is loaded, the default ledger with the root
          account is created.
    */
    bool RUN_STANDALONE = false;

    /** Determines if the server will sign a tx, given an account's secret seed.

        In the past, this was allowed, but this functionality can have security
        implications. The new default is to not allow this functionality, but
        a config option is included to enable this.
    */
    bool signingEnabled_ = false;

public:
    bool doImport = false;
    bool nodeToShard = false;
    bool validateShards = false;
    bool ELB_SUPPORT = false;

    std::vector<std::string> IPS;           // Peer IPs from rippled.cfg.
    std::vector<std::string> IPS_FIXED;     // Fixed Peer IPs from rippled.cfg.
    std::vector<std::string> SNTP_SERVERS;  // SNTP servers from rippled.cfg.

    enum StartUpType { FRESH, NORMAL, LOAD, LOAD_FILE, REPLAY, NETWORK };
    StartUpType START_UP = NORMAL;

    bool START_VALID = false;

    std::string START_LEDGER;

    // Network parameters

    // The number of fee units a reference transaction costs
    static constexpr FeeUnit32 TRANSACTION_FEE_BASE{10};

    // Note: The following parameters do not relate to the UNL or trust at all
    // Minimum number of nodes to consider the network present
    std::size_t NETWORK_QUORUM = 1;

    // Peer networking parameters
    bool RELAY_UNTRUSTED_VALIDATIONS = true;
    bool RELAY_UNTRUSTED_PROPOSALS = false;

    // True to ask peers not to relay current IP.
    bool PEER_PRIVATE = false;
    std::size_t PEERS_MAX = 0;

    std::chrono::seconds WEBSOCKET_PING_FREQ = std::chrono::minutes{5};

    // Path searching
    int PATH_SEARCH_OLD = 7;
    int PATH_SEARCH = 7;
    int PATH_SEARCH_FAST = 2;
    int PATH_SEARCH_MAX = 10;

    // Validation
    boost::optional<std::size_t>
        VALIDATION_QUORUM;  // validations to consider ledger authoritative

    XRPAmount FEE_DEFAULT{10};
    XRPAmount FEE_ACCOUNT_RESERVE{200 * DROPS_PER_XRP};
    XRPAmount FEE_OWNER_RESERVE{50 * DROPS_PER_XRP};

    // Node storage configuration
    std::uint32_t LEDGER_HISTORY = 256;
    std::uint32_t FETCH_DEPTH = 1000000000;

    std::size_t NODE_SIZE = 0;

    bool SSL_VERIFY = true;
    std::string SSL_VERIFY_FILE;
    std::string SSL_VERIFY_DIR;

    // Compression
    bool COMPRESSION = false;

    // Amendment majority time
    std::chrono::seconds AMENDMENT_MAJORITY_TIME = defaultAmendmentMajorityTime;

    // Thread pool configuration
    std::size_t WORKERS = 0;

    // Reduce-relay - these parameters are experimental.
    // Enable reduce-relay functionality
    bool REDUCE_RELAY_ENABLE = false;
    // Send squelch message to peers
    bool REDUCE_RELAY_SQUELCH = false;

    // These override the command line client settings
    boost::optional<beast::IP::Endpoint> rpc_ip;

    std::unordered_set<uint256, beast::uhash<>> features;

public:
    Config() : j_{beast::Journal::getNullSink()}
    {
    }

    /* Be very careful to make sure these bool params
        are in the right order. */
    void
    setup(
        std::string const& strConf,
        bool bQuiet,
        bool bSilent,
        bool bStandalone);
    void
    setupControl(bool bQuiet, bool bSilent, bool bStandalone);

    /**
     *  Load the config from the contents of the string.
     *
     *  @param fileContents String representing the config contents.
     */
    void
    loadFromString(std::string const& fileContents);

    bool
    quiet() const
    {
        return QUIET;
    }
    bool
    silent() const
    {
        return SILENT;
    }
    bool
    standalone() const
    {
        return RUN_STANDALONE;
    }

    bool
    canSign() const
    {
        return signingEnabled_;
    }

    /** Retrieve the default value for the item at the specified node size

        @param item The item for which the default value is needed
        @param node Optional value, used to adjust the result to match the
                    size of a node (0: tiny, ..., 4: huge). If unseated,
                    uses the configured size (NODE_SIZE).

        @throw This method can throw std::out_of_range if you ask for values
               that it does not recognize or request a non-default node-size.

        @return The value for the requested item.

        @note The defaults are selected so as to be reasonable, but the node
              size is an imprecise metric that combines multiple aspects of
              the underlying system; this means that we can't provide optimal
              defaults in the code for every case.
    */
    int
    getValueFor(SizedItem item, boost::optional<std::size_t> node = boost::none)
        const;
};

}  // namespace ripple

#endif