monero-lws/src/error.cpp

// Copyright (c) 2018-2020, The Monero Project
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without modification, are
// permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this list of
//    conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice, this list
//    of conditions and the following disclaimer in the documentation and/or other
//    materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its contributors may be
//    used to endorse or promote products derived from this software without specific
//    prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
// THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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#include "error.h"

#include <string>

namespace lws
{
  struct category final : std::error_category
  {
    virtual const char* name() const noexcept override final
    {
      return "lws::error_category()";
    }

    virtual std::string message(int value) const override final
    {
      switch (lws::error(value))
      {
      case error::account_exists:
        return "Account with specified address already exists";
      case error::account_max:
        return "Account limit has been reached";
      case error::account_not_found:
        return "No account with the specified address exists";
      case error::bad_address:
        return "Invalid base58 public address - wrong --network ?";
      case error::bad_view_key:
        return "Address/viewkey mismatch";
      case error::bad_blockchain:
        return "Unable to sync blockchain - wrong --network ?";
      case error::bad_client_tx:
        return "Received invalid transaction from REST client";
      case error::bad_daemon_response:
        return "Response from monerod daemon was bad/unexpected";
      case error::bad_height:
        return "Invalid blockchain height";
      case error::blockchain_reorg:
        return "A blockchain reorg has been detected";
      case error::configuration:
        return "Invalid process configuration";
      case error::create_queue_max:
        return "Exceeded maxmimum number of pending account requests";
      case error::crypto_failure:
        return "A cryptographic function failed";
      case error::daemon_timeout:
        return "Connection failed with daemon";
      case error::duplicate_request:
        return "A request of this type for this address has already been made";
      case error::exceeded_blockchain_buffer:
        return "Exceeded internal buffer for blockchain hashes";
      case error::exceeded_rest_request_limit:
        return "Request from client via REST exceeded enforced limits";
      case error::exchange_rates_disabled:
        return "Exchange rates feature is disabled";
      case error::exchange_rates_fetch:
        return "Unspecified error when retrieving exchange rates";
      case error::http_server:
        return "HTTP server failed";
      case error::exchange_rates_old:
        return "Exchange rates are older than cache interval";
      case error::not_enough_mixin:
        return "Not enough outputs to meet requested mixin count";
      case error::signal_abort_process:
        return "An in-process message was received to abort the process";
      case error::signal_abort_scan:
        return "An in-process message was received to abort account scanning";
      case error::signal_unknown:
        return "An unknown in-process message was received";
      case error::system_clock_invalid_range:
        return "System clock is out of range for account storage format";
      case error::tx_relay_failed:
        return "The daemon failed to relay transaction from REST client";
      default:
        break;
      }
      return "Unknown lws::error_category() value";
    }

    virtual std::error_condition default_error_condition(int value) const noexcept override final
    {
      switch (lws::error(value))
      {
      case error::bad_address:
      case error::bad_view_key:
        return std::errc::bad_address;
      case error::daemon_timeout:
        return std::errc::timed_out;
      case error::exceeded_blockchain_buffer:
        return std::errc::no_buffer_space;
      case error::signal_abort_process:
      case error::signal_abort_scan:
      case error::signal_unknown:
        return std::errc::interrupted;
      case error::system_clock_invalid_range:
        return std::errc::result_out_of_range;
      default:
        break; // map to unmatchable category
      }
      return std::error_condition{value, *this};
    }
  };

  std::error_category const& error_category() noexcept
  {
    static const category instance{};
    return instance;
  }
} // lws