MPTokenHelpers.h

#pragma once
 
#include <xrpl/beast/utility/Journal.h>
#include <xrpl/ledger/ApplyView.h>
#include <xrpl/ledger/ReadView.h>
#include <xrpl/ledger/helpers/TokenHelpers.h>
#include <xrpl/protocol/MPTIssue.h>
#include <xrpl/protocol/Rate.h>
#include <xrpl/protocol/STAmount.h>
#include <xrpl/protocol/TER.h>
 
#include <initializer_list>
#include <optional>
 
namespace xrpl {
 
//------------------------------------------------------------------------------
//
// Freeze checking (MPT-specific)
//
//------------------------------------------------------------------------------
 
[[nodiscard]] bool
isGlobalFrozen(ReadView const& view, MPTIssue const& mptIssue);
 
[[nodiscard]] bool
isIndividualFrozen(ReadView const& view, AccountID const& account, MPTIssue const& mptIssue);
 
[[nodiscard]] bool
isFrozen(
    ReadView const& view,
    AccountID const& account,
    MPTIssue const& mptIssue,
    std::uint8_t depth = 0);
 
[[nodiscard]] bool
isAnyFrozen(
    ReadView const& view,
    std::initializer_list<AccountID> const& accounts,
    MPTIssue const& mptIssue,
    std::uint8_t depth = 0);
 
//------------------------------------------------------------------------------
//
// Transfer rate (MPT-specific)
//
//------------------------------------------------------------------------------

[[nodiscard]] Rate
transferRate(ReadView const& view, MPTID const& issuanceID);
 
//------------------------------------------------------------------------------
//
// Holding checks (MPT-specific)
//
//------------------------------------------------------------------------------
 
[[nodiscard]] TER
canAddHolding(ReadView const& view, MPTIssue const& mptIssue);
 
//------------------------------------------------------------------------------
//
// Authorization (MPT-specific)
//
//------------------------------------------------------------------------------
 
[[nodiscard]] TER
authorizeMPToken(
    ApplyView& view,
    XRPAmount const& priorBalance,
    MPTID const& mptIssuanceID,
    AccountID const& account,
    beast::Journal journal,
    std::uint32_t flags = 0,
    std::optional<AccountID> holderID = std::nullopt);

[[nodiscard]] TER
requireAuth(
    ReadView const& view,
    MPTIssue const& mptIssue,
    AccountID const& account,
    AuthType authType = AuthType::Legacy,
    std::uint8_t depth = 0);

[[nodiscard]] TER
enforceMPTokenAuthorization(
    ApplyView& view,
    MPTID const& mptIssuanceID,
    AccountID const& account,
    XRPAmount const& priorBalance,
    beast::Journal j);

[[nodiscard]] Asset
assetOfHolding(SLE const& sleShareIssuance, SLE const& sleHolding);

[[nodiscard]] TER
canTransfer(
    ReadView const& view,
    MPTIssue const& mptIssue,
    AccountID const& from,
    AccountID const& to,
    WaiveMPTCanTransfer waive = WaiveMPTCanTransfer::No,
    std::uint8_t depth = 0);

[[nodiscard]] TER
canTrade(ReadView const& view, Asset const& asset, std::uint8_t depth = 0);

[[nodiscard]] TER
canMPTTradeAndTransfer(
    ReadView const& v,
    Asset const& asset,
    AccountID const& from,
    AccountID const& to);
 
//------------------------------------------------------------------------------
//
// Empty holding operations (MPT-specific)
//
//------------------------------------------------------------------------------
 
[[nodiscard]] TER
addEmptyHolding(
    ApplyView& view,
    AccountID const& accountID,
    XRPAmount priorBalance,
    MPTIssue const& mptIssue,
    beast::Journal journal);
 
[[nodiscard]] TER
removeEmptyHolding(
    ApplyView& view,
    AccountID const& accountID,
    MPTIssue const& mptIssue,
    beast::Journal journal);
 
//------------------------------------------------------------------------------
//
// Escrow operations (MPT-specific)
//
//------------------------------------------------------------------------------
 
TER
lockEscrowMPT(
    ApplyView& view,
    AccountID const& uGrantorID,
    STAmount const& saAmount,
    beast::Journal j);
 
TER
unlockEscrowMPT(
    ApplyView& view,
    AccountID const& uGrantorID,
    AccountID const& uGranteeID,
    STAmount const& netAmount,
    STAmount const& grossAmount,
    beast::Journal j);
 
TER
createMPToken(
    ApplyView& view,
    MPTID const& mptIssuanceID,
    AccountID const& account,
    std::uint32_t const flags);
 
TER
checkCreateMPT(
    xrpl::ApplyView& view,
    xrpl::MPTIssue const& mptIssue,
    xrpl::AccountID const& holder,
    beast::Journal j);
 
//------------------------------------------------------------------------------
//
// MPT Overflow related
//
//------------------------------------------------------------------------------
 
// MaximumAmount doesn't exceed 2**63-1
std::int64_t
maxMPTAmount(SLE const& sleIssuance);
 
// OutstandingAmount may overflow and available amount might be negative.
// But available amount is always <= |MaximumAmount - OutstandingAmount|.
std::int64_t
availableMPTAmount(SLE const& sleIssuance);
 
std::int64_t
availableMPTAmount(ReadView const& view, MPTID const& mptID);

bool
isMPTOverflow(
    std::int64_t sendAmount,
    std::uint64_t outstandingAmount,
    std::int64_t maximumAmount,
    AllowMPTOverflow allowOverflow);

[[nodiscard]] STAmount
issuerFundsToSelfIssue(ReadView const& view, MPTIssue const& issue);

void
issuerSelfDebitHookMPT(ApplyView& view, MPTIssue const& issue, std::uint64_t amount);
 
}  // namespace xrpl