applySteps.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_TX_APPLYSTEPS_H_INCLUDED
#define RIPPLE_TX_APPLYSTEPS_H_INCLUDED
 
#include <ripple/ledger/ApplyViewImpl.h>
#include <ripple/beast/utility/Journal.h>
 
namespace ripple {
 
class Application;
class STTx;
 
inline
bool
isTecClaimHardFail(TER ter, ApplyFlags flags)
{
    return isTecClaim(ter) && !(flags & tapRETRY);
}
 
struct PreflightResult
{
public:
    STTx const& tx;
    Rules const rules;
    ApplyFlags const flags;
    beast::Journal const j;
 
    NotTEC const ter;
 
    template<class Context>
    PreflightResult(Context const& ctx_,
        NotTEC ter_)
        : tx(ctx_.tx)
        , rules(ctx_.rules)
        , flags(ctx_.flags)
        , j(ctx_.j)
        , ter(ter_)
    {
    }
 
    PreflightResult(PreflightResult const&) = default;
    PreflightResult& operator=(PreflightResult const&) = delete;
};
 
struct PreclaimResult
{
public:
    ReadView const& view;
    STTx const& tx;
    ApplyFlags const flags;
    beast::Journal const j;
 
    TER const ter;
    bool const likelyToClaimFee;
 
    template<class Context>
    PreclaimResult(Context const& ctx_, TER ter_)
        : view(ctx_.view)
        , tx(ctx_.tx)
        , flags(ctx_.flags)
        , j(ctx_.j)
        , ter(ter_)
        , likelyToClaimFee(ter == tesSUCCESS
            || isTecClaimHardFail(ter, flags))
    {
    }
 
    PreclaimResult(PreclaimResult const&) = default;
    PreclaimResult& operator=(PreclaimResult const&) = delete;
};
 
struct TxConsequences
{
    enum ConsequenceCategory
    {
        normal = 0,
        blocker
    };
 
    ConsequenceCategory const category;
    XRPAmount const fee;
    XRPAmount const potentialSpend;
 
    TxConsequences(ConsequenceCategory const category_,
        XRPAmount const fee_, XRPAmount const spend_)
        : category(category_)
        , fee(fee_)
        , potentialSpend(spend_)
    {
    }
 
    TxConsequences(TxConsequences const&) = default;
    TxConsequences& operator=(TxConsequences const&) = delete;
    TxConsequences(TxConsequences&&) = default;
    TxConsequences& operator=(TxConsequences&&) = delete;
 
};
 
PreflightResult
preflight(Application& app, Rules const& rules,
    STTx const& tx, ApplyFlags flags,
        beast::Journal j);
 
PreclaimResult
preclaim(PreflightResult const& preflightResult,
    Application& app, OpenView const& view);
 
FeeUnit64
calculateBaseFee(ReadView const& view,
    STTx const& tx);
 
TxConsequences
calculateConsequences(PreflightResult const& preflightResult);
 
std::pair<TER, bool>
doApply(PreclaimResult const& preclaimResult,
    Application& app, OpenView& view);
 
}
 
#endif