MPTHolders.hpp

#pragma once
 
#include "data/BackendInterface.hpp"
#include "rpc/JS.hpp"
#include "rpc/common/Modifiers.hpp"
#include "rpc/common/Specs.hpp"
#include "rpc/common/Types.hpp"
#include "rpc/common/Validators.hpp"
 
#include <boost/json/array.hpp>
#include <boost/json/conversion.hpp>
#include <boost/json/value.hpp>
#include <xrpl/protocol/jss.h>
 
#include <cstdint>
#include <memory>
#include <optional>
#include <string>
 
namespace rpc {

class MPTHoldersHandler {
    std::shared_ptr<BackendInterface> sharedPtrBackend_;
 
public:
    static constexpr auto kLIMIT_MIN = 1;
    static constexpr auto kLIMIT_MAX = 100;
    static constexpr auto kLIMIT_DEFAULT = 50;

    struct Output {
        boost::json::array mpts;
        uint32_t ledgerIndex;
        std::string mptID;
        bool validated = true;
        uint32_t limit;
        std::optional<std::string> marker;
    };

    struct Input {
        std::string mptID;
        std::optional<std::string> ledgerHash;
        std::optional<uint32_t> ledgerIndex;
        std::optional<std::string> marker;
        std::optional<uint32_t> limit;
    };
 
    using Result = HandlerReturnType<Output>;

    MPTHoldersHandler(std::shared_ptr<BackendInterface> sharedPtrBackend)
        : sharedPtrBackend_(std::move(sharedPtrBackend))
    {
    }

    static RpcSpecConstRef
    spec([[maybe_unused]] uint32_t apiVersion)
    {
        static auto const kRPC_SPEC = RpcSpec{
            {JS(mpt_issuance_id),
             validation::Required{},
             validation::CustomValidators::uint192HexStringValidator},
            {JS(ledger_hash), validation::CustomValidators::uint256HexStringValidator},
            {JS(ledger_index), validation::CustomValidators::ledgerIndexValidator},
            {JS(limit),
             validation::Type<uint32_t>{},
             validation::Min(1u),
             modifiers::Clamp<int32_t>{kLIMIT_MIN, kLIMIT_MAX}},
            {JS(marker), validation::CustomValidators::uint160HexStringValidator},
        };
 
        return kRPC_SPEC;
    }

    Result
    process(Input const& input, Context const& ctx) const;
 
private:
    friend void
    tag_invoke(boost::json::value_from_tag, boost::json::value& jv, Output const& output);

    friend Input
    tag_invoke(boost::json::value_to_tag<Input>, boost::json::value const& jv);
};
}  // namespace rpc