Errors.hpp

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//------------------------------------------------------------------------------
/*
    This file is part of clio: https://github.com/XRPLF/clio
    Copyright (c) 2022, the clio developers.
 
    Permission to use, copy, modify, and 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.
*/
//==============================================================================

#pragma once
 
#include <boost/json/object.hpp>
#include <xrpl/protocol/ErrorCodes.h>
 
#include <exception>
#include <optional>
#include <string>
#include <string_view>
#include <utility>
#include <variant>
 
namespace rpc {

enum class ClioError {
    // normal clio errors start with 5000
    RpcMalformedCurrency = 5000,
    RpcMalformedRequest = 5001,
    RpcMalformedOwner = 5002,
    RpcMalformedAddress = 5003,
    RpcUnknownOption = 5005,
    RpcFieldNotFoundTransaction = 5006,
    RpcMalformedOracleDocumentId = 5007,
    RpcMalformedAuthorizedCredentials = 5008,
    RpcEntryNotFound = 5009,
 
    // special system errors start with 6000
    RpcInvalidApiVersion = 6000,
    RpcCommandIsMissing = 6001,
    RpcCommandNotString = 6002,
    RpcCommandIsEmpty = 6003,
    RpcParamsUnparsable = 6004,
 
    // TODO: Since it is not only rpc errors here now, we should move it to util
    // etl related errors start with 7000
    // Higher value in this errors means better progress in the forwarding
    EtlConnectionError = 7000,
    EtlRequestError = 7001,
    EtlRequestTimeout = 7002,
    EtlInvalidResponse = 7003,
};

struct ClioErrorInfo {
    ClioError const code;
    std::string_view const error;
    std::string_view const message;
};

using RippledError = ripple::error_code_i;

using CombinedError = std::variant<RippledError, ClioError>;

struct Status {
    CombinedError code = RippledError::rpcSUCCESS;
    std::string error;
    std::string message;
    std::optional<boost::json::object> extraInfo;
 
    Status() = default;

    /* implicit */ Status(CombinedError code) : code(code) {};

    Status(CombinedError code, boost::json::object&& extraInfo) : code(code), extraInfo(std::move(extraInfo)) {};

    explicit Status(std::string message) : code(ripple::rpcUNKNOWN), message(std::move(message))
    {
    }

    Status(CombinedError code, std::string message) : code(code), message(std::move(message))
    {
    }

    Status(CombinedError code, std::string error, std::string message)
        : code(code), error(std::move(error)), message(std::move(message))
    {
    }
 
    bool
    operator==(Status const& other) const = default;

    operator bool() const
    {
        if (auto err = std::get_if<RippledError>(&code))
            return *err != RippledError::rpcSUCCESS;
 
        return true;
    }

    bool
    operator==(RippledError other) const
    {
        if (auto err = std::get_if<RippledError>(&code))
            return *err == other;
 
        return false;
    }

    bool
    operator==(ClioError other) const
    {
        if (auto err = std::get_if<ClioError>(&code))
            return *err == other;
 
        return false;
    }

    friend std::ostream&
    operator<<(std::ostream& stream, Status const& status);
};

enum WarningCode {
    WarnUnknown = -1,
    WarnRpcClio = 2001,
    WarnRpcOutdated = 2002,
    WarnRpcRateLimit = 2003,
    WarnRpcDeprecated = 2004
};

struct WarningInfo {
    constexpr WarningInfo() = default;

    constexpr WarningInfo(WarningCode code, char const* message) : code(code), message(message)
    {
    }
 
    WarningCode code = WarnUnknown;
    std::string_view const message = "unknown warning";
};

class InvalidParamsError : public std::exception {
    std::string msg_;
 
public:
    explicit InvalidParamsError(std::string msg) : msg_(std::move(msg))
    {
    }

    char const*
    what() const throw() override
    {
        return msg_.c_str();
    }
};

class AccountNotFoundError : public std::exception {
    std::string account_;
 
public:
    explicit AccountNotFoundError(std::string acct) : account_(std::move(acct))
    {
    }

    char const*
    what() const throw() override
    {
        return account_.c_str();
    }
};

static Status gOk;

WarningInfo const&
getWarningInfo(WarningCode code);

ClioErrorInfo const&
getErrorInfo(ClioError code);

boost::json::object
makeWarning(WarningCode code);

boost::json::object
makeError(Status const& status);

boost::json::object
makeError(
    RippledError err,
    std::optional<std::string_view> customError = std::nullopt,
    std::optional<std::string_view> customMessage = std::nullopt
);

boost::json::object
makeError(
    ClioError err,
    std::optional<std::string_view> customError = std::nullopt,
    std::optional<std::string_view> customMessage = std::nullopt
);
 
}  // namespace rpc