InvariantCheck.h

//------------------------------------------------------------------------------
/*
    This file is part of rippled: https://github.com/ripple/rippled
    Copyright (c) 2012-2017 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_APP_TX_INVARIANTCHECK_H_INCLUDED
#define RIPPLE_APP_TX_INVARIANTCHECK_H_INCLUDED
 
#include <ripple/basics/base_uint.h>
#include <ripple/beast/utility/Journal.h>
#include <ripple/protocol/STLedgerEntry.h>
#include <ripple/protocol/STTx.h>
#include <ripple/protocol/TER.h>
#include <cstdint>
#include <map>
#include <tuple>
#include <utility>
 
namespace ripple {
 
class ReadView;
 
#if GENERATING_DOCS
 
class InvariantChecker_PROTOTYPE
{
public:
    explicit InvariantChecker_PROTOTYPE() = default;
 
    void
    visitEntry(
        bool isDelete,
        std::shared_ptr<SLE const> const& before,
        std::shared_ptr<SLE const> const& after);
 
    bool
    finalize(
        STTx const& tx,
        TER const tec,
        XRPAmount const fee,
        ReadView const& view,
        beast::Journal const& j);
};
#endif
 
class TransactionFeeCheck
{
public:
    void
    visitEntry(
        bool,
        std::shared_ptr<SLE const> const&,
        std::shared_ptr<SLE const> const&);
 
    bool
    finalize(
        STTx const&,
        TER const,
        XRPAmount const,
        ReadView const&,
        beast::Journal const&);
};
 
class XRPNotCreated
{
    std::int64_t drops_ = 0;
 
public:
    void
    visitEntry(
        bool,
        std::shared_ptr<SLE const> const&,
        std::shared_ptr<SLE const> const&);
 
    bool
    finalize(
        STTx const&,
        TER const,
        XRPAmount const,
        ReadView const&,
        beast::Journal const&);
};
 
class AccountRootsNotDeleted
{
    std::uint32_t accountsDeleted_ = 0;
 
public:
    void
    visitEntry(
        bool,
        std::shared_ptr<SLE const> const&,
        std::shared_ptr<SLE const> const&);
 
    bool
    finalize(
        STTx const&,
        TER const,
        XRPAmount const,
        ReadView const&,
        beast::Journal const&);
};
 
class XRPBalanceChecks
{
    bool bad_ = false;
 
public:
    void
    visitEntry(
        bool,
        std::shared_ptr<SLE const> const&,
        std::shared_ptr<SLE const> const&);
 
    bool
    finalize(
        STTx const&,
        TER const,
        XRPAmount const,
        ReadView const&,
        beast::Journal const&);
};
 
class LedgerEntryTypesMatch
{
    bool typeMismatch_ = false;
    bool invalidTypeAdded_ = false;
 
public:
    void
    visitEntry(
        bool,
        std::shared_ptr<SLE const> const&,
        std::shared_ptr<SLE const> const&);
 
    bool
    finalize(
        STTx const&,
        TER const,
        XRPAmount const,
        ReadView const&,
        beast::Journal const&);
};
 
class NoXRPTrustLines
{
    bool xrpTrustLine_ = false;
 
public:
    void
    visitEntry(
        bool,
        std::shared_ptr<SLE const> const&,
        std::shared_ptr<SLE const> const&);
 
    bool
    finalize(
        STTx const&,
        TER const,
        XRPAmount const,
        ReadView const&,
        beast::Journal const&);
};
 
class NoBadOffers
{
    bool bad_ = false;
 
public:
    void
    visitEntry(
        bool,
        std::shared_ptr<SLE const> const&,
        std::shared_ptr<SLE const> const&);
 
    bool
    finalize(
        STTx const&,
        TER const,
        XRPAmount const,
        ReadView const&,
        beast::Journal const&);
};
 
class NoZeroEscrow
{
    bool bad_ = false;
 
public:
    void
    visitEntry(
        bool,
        std::shared_ptr<SLE const> const&,
        std::shared_ptr<SLE const> const&);
 
    bool
    finalize(
        STTx const&,
        TER const,
        XRPAmount const,
        ReadView const&,
        beast::Journal const&);
};
 
class ValidNewAccountRoot
{
    std::uint32_t accountsCreated_ = 0;
    std::uint32_t accountSeq_ = 0;  // Only meaningful if accountsCreated_ > 0
 
public:
    void
    visitEntry(
        bool,
        std::shared_ptr<SLE const> const&,
        std::shared_ptr<SLE const> const&);
 
    bool
    finalize(
        STTx const&,
        TER const,
        XRPAmount const,
        ReadView const&,
        beast::Journal const&);
};
 
// additional invariant checks can be declared above and then added to this
// tuple
using InvariantChecks = std::tuple<
    TransactionFeeCheck,
    AccountRootsNotDeleted,
    LedgerEntryTypesMatch,
    XRPBalanceChecks,
    XRPNotCreated,
    NoXRPTrustLines,
    NoBadOffers,
    NoZeroEscrow,
    ValidNewAccountRoot>;
 
inline InvariantChecks
getInvariantChecks()
{
    return InvariantChecks{};
}
 
}  // namespace ripple
 
#endif