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#region Copyright notice and license

// Copyright 2015 gRPC authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#endregion

namespace Grpc.Core
{
    /// <summary>
    /// Result of a remote procedure call.
    /// Based on grpc_status_code from grpc/status.h
    /// </summary>
    public enum StatusCode
    {
        /// <summary>Not an error; returned on success.</summary>
        OK = 0,

        /// <summary>The operation was cancelled (typically by the caller).</summary>
        Cancelled = 1,

        /// <summary>
        /// Unknown error.  An example of where this error may be returned is
        /// if a Status value received from another address space belongs to
        /// an error-space that is not known in this address space.  Also
        /// errors raised by APIs that do not return enough error information
        /// may be converted to this error.
        /// </summary>
        Unknown = 2,

        /// <summary>
        /// Client specified an invalid argument.  Note that this differs
        /// from FAILED_PRECONDITION.  INVALID_ARGUMENT indicates arguments
        /// that are problematic regardless of the state of the system
        /// (e.g., a malformed file name).
        /// </summary>
        InvalidArgument = 3,

        /// <summary>
        /// Deadline expired before operation could complete.  For operations
        /// that change the state of the system, this error may be returned
        /// even if the operation has completed successfully.  For example, a
        /// successful response from a server could have been delayed long
        /// enough for the deadline to expire.
        /// </summary>
        DeadlineExceeded = 4,

        /// <summary>Some requested entity (e.g., file or directory) was not found.</summary>
        NotFound = 5,

        /// <summary>Some entity that we attempted to create (e.g., file or directory) already exists.</summary>
        AlreadyExists = 6,

        /// <summary>
        /// The caller does not have permission to execute the specified
        /// operation.  PERMISSION_DENIED must not be used for rejections
        /// caused by exhausting some resource (use RESOURCE_EXHAUSTED
        /// instead for those errors).  PERMISSION_DENIED must not be
        /// used if the caller can not be identified (use UNAUTHENTICATED
        /// instead for those errors).
        /// </summary>
        PermissionDenied = 7,

        /// <summary>The request does not have valid authentication credentials for the operation.</summary>
        Unauthenticated = 16,

        /// <summary>
        /// Some resource has been exhausted, perhaps a per-user quota, or
        /// perhaps the entire file system is out of space.
        /// </summary>
        ResourceExhausted = 8,

        /// <summary>
        /// Operation was rejected because the system is not in a state
        /// required for the operation's execution.  For example, directory
        /// to be deleted may be non-empty, an rmdir operation is applied to
        /// a non-directory, etc.
        /// </summary>
        FailedPrecondition = 9,

        /// <summary>
        /// The operation was aborted, typically due to a concurrency issue
        /// like sequencer check failures, transaction aborts, etc.
        /// </summary>
        Aborted = 10,

        /// <summary>
        /// Operation was attempted past the valid range.  E.g., seeking or
        /// reading past end of file.
        /// </summary>
        OutOfRange = 11,

        /// <summary>Operation is not implemented or not supported/enabled in this service.</summary>
        Unimplemented = 12,

        /// <summary>
        /// Internal errors.  Means some invariants expected by underlying
        /// system has been broken.  If you see one of these errors,
        /// something is very broken.
        /// </summary>
        Internal = 13,

        /// <summary>
        /// The service is currently unavailable.  This is a most likely a
        /// transient condition and may be corrected by retrying with
        /// a backoff.
        /// </summary>
        Unavailable = 14,

        /// <summary>Unrecoverable data loss or corruption.</summary>
        DataLoss = 15
    }
}