LambdaRuntimeError.swift

//===----------------------------------------------------------------------===//
//
// This source file is part of the SwiftAWSLambdaRuntime open source project
//
// Copyright (c) 2024 Apple Inc. and the SwiftAWSLambdaRuntime project authors
// Licensed under Apache License v2.0
//
// See LICENSE.txt for license information
// See CONTRIBUTORS.txt for the list of SwiftAWSLambdaRuntime project authors
//
// SPDX-License-Identifier: Apache-2.0
//
//===----------------------------------------------------------------------===//

public struct LambdaRuntimeError: Error {
    public enum Code: Sendable {

        /// internal error codes for LambdaRuntimeClient
        case closingRuntimeClient

        case connectionToControlPlaneLost
        case connectionToControlPlaneGoingAway
        case invocationMissingMetadata

        case writeAfterFinishHasBeenSent
        case finishAfterFinishHasBeenSent
        case lostConnectionToControlPlane
        case unexpectedStatusCodeForRequest

        case nextInvocationMissingHeaderRequestID
        case nextInvocationMissingHeaderDeadline
        case nextInvocationMissingHeaderInvokeFuctionARN

        case missingLambdaRuntimeAPIEnvironmentVariable
        case runtimeCanOnlyBeStartedOnce
        case invalidPort

        /// public error codes for LambdaRuntime
        case moreThanOneLambdaRuntimeInstance
    }

    package init(code: Code, underlying: (any Error)? = nil) {
        self.code = code
        self.underlying = underlying
    }

    public var code: Code
    public var underlying: (any Error)?

}