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 <xrpld/ledger/ApplyViewImpl.h>
#include <xrpl/beast/utility/Journal.h>
 
namespace ripple {
 
class Application;
class STTx;
class TxQ;
 
inline bool
isTecClaimHardFail(TER ter, ApplyFlags flags)
{
    return isTecClaim(ter) && !(flags & tapRETRY);
}
 
class TxConsequences
{
public:
    enum Category {
        normal = 0,
        blocker
    };
 
private:
    bool isBlocker_;
    XRPAmount fee_;
    XRPAmount potentialSpend_;
    SeqProxy seqProx_;
    std::uint32_t sequencesConsumed_;
 
public:
    // Constructor if preflight returns a value other than tesSUCCESS.
    // Asserts if tesSUCCESS is passed.
    explicit TxConsequences(NotTEC pfresult);
 
    explicit TxConsequences(STTx const& tx);
 
    TxConsequences(STTx const& tx, Category category);
 
    TxConsequences(STTx const& tx, XRPAmount potentialSpend);
 
    TxConsequences(STTx const& tx, std::uint32_t sequencesConsumed);
 
    TxConsequences(TxConsequences const&) = default;
    TxConsequences&
    operator=(TxConsequences const&) = default;
    TxConsequences(TxConsequences&&) = default;
    TxConsequences&
    operator=(TxConsequences&&) = default;
 
    XRPAmount
    fee() const
    {
        return fee_;
    }
 
    XRPAmount const&
    potentialSpend() const
    {
        return potentialSpend_;
    }
 
    SeqProxy
    seqProxy() const
    {
        return seqProx_;
    }
 
    std::uint32_t
    sequencesConsumed() const
    {
        return sequencesConsumed_;
    }
 
    bool
    isBlocker() const
    {
        return isBlocker_;
    }
 
    // Return the SeqProxy that would follow this.
    SeqProxy
    followingSeq() const
    {
        SeqProxy following = seqProx_;
        following.advanceBy(sequencesConsumed());
        return following;
    }
};
 
struct PreflightResult
{
public:
    STTx const& tx;
    Rules const rules;
    TxConsequences const consequences;
    ApplyFlags const flags;
    beast::Journal const j;
 
    NotTEC const ter;
 
    template <class Context>
    PreflightResult(
        Context const& ctx_,
        std::pair<NotTEC, TxConsequences> const& result)
        : tx(ctx_.tx)
        , rules(ctx_.rules)
        , consequences(result.second)
        , flags(ctx_.flags)
        , j(ctx_.j)
        , ter(result.first)
    {
    }
 
    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;
};
 
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);
 
XRPAmount
calculateBaseFee(ReadView const& view, STTx const& tx);
 
XRPAmount
calculateDefaultBaseFee(ReadView const& view, STTx const& tx);
 
std::pair<TER, bool>
doApply(PreclaimResult const& preclaimResult, Application& app, OpenView& view);
 
}  // namespace ripple
 
#endif