STIssue.h

#pragma once
 
#include <xrpl/basics/CountedObject.h>
#include <xrpl/basics/contract.h>
#include <xrpl/json/json_value.h>
#include <xrpl/protocol/Asset.h>
#include <xrpl/protocol/Concepts.h>
#include <xrpl/protocol/Issue.h>
#include <xrpl/protocol/SField.h>
#include <xrpl/protocol/STBase.h>
#include <xrpl/protocol/Serializer.h>
 
#include <compare>
#include <cstddef>
#include <stdexcept>
#include <string>
 
namespace xrpl {
 
class STIssue final : public STBase, CountedObject<STIssue>
{
private:
    Asset asset_{xrpIssue()};
 
public:
    using value_type = Asset;
 
    STIssue() = default;
    STIssue(STIssue const& rhs) = default;
 
    explicit STIssue(SerialIter& sit, SField const& name);
 
    template <AssetType A>
    explicit STIssue(SField const& name, A const& issue);
 
    explicit STIssue(SField const& name);
 
    STIssue&
    operator=(STIssue const& rhs) = default;
 
    template <ValidIssueType TIss>
    TIss const&
    get() const;
 
    template <ValidIssueType TIss>
    [[nodiscard]] bool
    holds() const;
 
    [[nodiscard]] value_type const&
    value() const noexcept;
 
    void
    setIssue(Asset const& issue);
 
    [[nodiscard]] SerializedTypeID
    getSType() const override;
 
    [[nodiscard]] std::string
    getText() const override;
 
    [[nodiscard]] json::Value getJson(JsonOptions) const override;
 
    void
    add(Serializer& s) const override;
 
    [[nodiscard]] bool
    isEquivalent(STBase const& t) const override;
 
    [[nodiscard]] bool
    isDefault() const override;
 
    friend constexpr bool
    operator==(STIssue const& lhs, STIssue const& rhs);
 
    friend constexpr std::weak_ordering
    operator<=>(STIssue const& lhs, STIssue const& rhs);
 
    friend constexpr bool
    operator==(STIssue const& lhs, Asset const& rhs);
 
    friend constexpr std::weak_ordering
    operator<=>(STIssue const& lhs, Asset const& rhs);
 
private:
    STBase*
    copy(std::size_t n, void* buf) const override;
    STBase*
    move(std::size_t n, void* buf) override;
 
    friend class detail::STVar;
};
 
template <AssetType A>
STIssue::STIssue(SField const& name, A const& asset) : STBase{name}, asset_{asset}
{
    if (holds<Issue>() && !isConsistent(asset_.get<Issue>()))
        Throw<std::runtime_error>("Invalid asset: currency and account native mismatch");
}
 
STIssue
issueFromJson(SField const& name, json::Value const& v);
 
template <ValidIssueType TIss>
bool
STIssue::holds() const
{
    return asset_.holds<TIss>();
}
 
template <ValidIssueType TIss>
TIss const&
STIssue::get() const
{
    if (!holds<TIss>(asset_))
        Throw<std::runtime_error>("Asset doesn't hold the requested issue");
    return std::get<TIss>(asset_);
}
 
inline STIssue::value_type const&
STIssue::value() const noexcept
{
    return asset_;
}
 
inline void
STIssue::setIssue(Asset const& asset)
{
    if (holds<Issue>() && !isConsistent(asset_.get<Issue>()))
        Throw<std::runtime_error>("Invalid asset: currency and account native mismatch");
 
    asset_ = asset;
}
 
constexpr bool
operator==(STIssue const& lhs, STIssue const& rhs)
{
    return lhs.asset_ == rhs.asset_;
}
 
constexpr std::weak_ordering
operator<=>(STIssue const& lhs, STIssue const& rhs)
{
    return lhs.asset_ <=> rhs.asset_;
}
 
constexpr bool
operator==(STIssue const& lhs, Asset const& rhs)
{
    return lhs.asset_ == rhs;
}
 
constexpr std::weak_ordering
operator<=>(STIssue const& lhs, Asset const& rhs)
{
    return lhs.asset_ <=> rhs;
}
 
}  // namespace xrpl