Initial working base separated from top-level monero project

src/error.h

@@ -0,0 +1,79 @@
+// 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
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
+// THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+#pragma once
+
+#include <system_error>
+#include <type_traits>
+
+namespace lws
+{
+  enum class error : int
+  {
+    // 0 is reserved for no error, as per expect<T>
+    account_exists = 1,         //!< Tried to create an account that already exists
+    account_max,                //!< Maximum number of accounts have been created
+    account_not_found,          //!< Account address is not in database.
+    bad_address,                //!< Invalid base58 public address
+    bad_view_key,               //!< Account has address/viewkey mismatch
+    bad_blockchain,             //!< Blockchain is invalid or wrong network type
+    bad_client_tx,              //!< REST client submitted invalid transaction
+    bad_daemon_response,        //!< RPC Response from daemon was invalid
+    blockchain_reorg,           //!< Blockchain reorg after fetching/scanning block(s)
+    configuration,              //!< Process configuration invalid
+    crypto_failure,             //!< Cryptographic function failed
+    create_queue_max,           //!< Reached maximum pending account requests
+    daemon_timeout,             //!< ZMQ send/receive timeout
+    duplicate_request,          //!< Account already has a request of  this type pending
+    exceeded_blockchain_buffer, //!< Out buffer for blockchain is too small
+    exceeded_rest_request_limit,//!< Exceeded enforced size limits for request
+    exchange_rates_disabled,    //!< Exchange rates fetching is disabled
+    exchange_rates_fetch,       //!< Exchange rates fetching failed
+    exchange_rates_old,         //!< Exchange rates are older than cache interval
+    http_server,                //!< HTTP server failure (init or run)
+    not_enough_mixin,           //!< Not enough outputs to meet mixin count
+    signal_abort_process,       //!< In process ZMQ PUB to abort the process was received
+    signal_abort_scan,          //!< In process ZMQ PUB to abort the scan was received
+    signal_unknown,             //!< An unknown in process ZMQ PUB was received
+    system_clock_invalid_range, //!< System clock is out of range for storage format
+    tx_relay_failed             //!< Daemon failed to relayed tx from REST client
+  };
+
+  std::error_category const& error_category() noexcept;
+
+  inline std::error_code make_error_code(lws::error value) noexcept
+  {
+    return std::error_code{int(value), error_category()};
+  }
+}
+
+namespace std
+{
+  template<>
+  struct is_error_code_enum<::lws::error>
+    : true_type
+  {};
+}