The Swift Package Index logo.Swift Package Index

Track the adoption of Swift 6 strict concurrency checks for data race safety. How many packages are Ready for Swift 6?

Build Information

Failed to build BlockchainSwift with Swift 5.10 for macOS (SPM).

Build Command

env DEVELOPER_DIR=/Applications/Xcode-15.3.0-Beta.2.app xcrun swift build --arch arm64

Build Log

========================================
RunAll
========================================
Builder version: 4.29.0
Interrupt handler set up.
========================================
Checkout
========================================
Clone URL: https://github.com/nevstad/blockchain-swift.git
Reference: master
Initialized empty Git repository in /Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/.git/
From https://github.com/nevstad/blockchain-swift
 * branch            master     -> FETCH_HEAD
 * [new branch]      master     -> origin/master
HEAD is now at 229e614 Merge pull request #4 from nevstad/feature/nio
Cloned https://github.com/nevstad/blockchain-swift.git
Revision (git rev-parse @):
229e61429a7d9adfeb5d835bee9f75fc1c8f8d2f
SUCCESS checkout https://github.com/nevstad/blockchain-swift.git at master
========================================
Build
========================================
Selected platform:         macosSpm
Swift version:             5.10
Building package at path:  $workDir
https://github.com/nevstad/blockchain-swift.git
Running build ...
env DEVELOPER_DIR=/Applications/Xcode-15.3.0-Beta.2.app xcrun swift build --arch arm64
Building for debugging...
[0/20] Write sources
[9/20] Compiling CNIOWindows shim.c
[10/20] Compiling CNIOWindows WSAStartup.c
[10/20] Write sources
[13/20] Compiling CNIOLinux shim.c
[14/20] Compiling CNIOLinux liburing_shims.c
[15/20] Write swift-version--423B1241ED78D482.txt
[16/43] Compiling _AtomicsShims.c
[17/43] Compiling CNIODarwin shim.c
[19/43] Emitting module _NIOBase64
[20/62] Compiling Atomics AtomicMemoryOrderings.swift
[21/62] Compiling Atomics DoubleWord.swift
[22/64] Compiling Atomics AtomicInteger.swift
[23/64] Compiling Atomics AtomicOptionalWrappable.swift
[24/64] Compiling Atomics IntegerConformances.swift
[25/64] Compiling Atomics PointerConformances.swift
[26/64] Compiling Atomics Primitives.native.swift
[27/64] Compiling Atomics AtomicBool.swift
[28/64] Compiling Atomics UnsafeAtomic.swift
[29/64] Compiling Atomics OptionalRawRepresentable.swift
[30/64] Compiling Atomics RawRepresentable.swift
[31/64] Compiling Atomics UnsafeAtomicLazyReference.swift
[32/64] Compiling Atomics Primitives.shims.swift
[33/64] Compiling _CollectionsUtilities UnsafeBufferPointer+Extras.swift
[34/64] Compiling _CollectionsUtilities UnsafeMutableBufferPointer+Extras.swift
[35/64] Compiling Atomics AtomicReference.swift
[36/64] Compiling Atomics AtomicStorage.swift
[37/64] Compiling Atomics AtomicValue.swift
[38/64] Emitting module _CollectionsUtilities
[39/64] Compiling _NIOBase64 Base64.swift
[42/82] Compiling _NIODataStructures PriorityQueue.swift
[43/82] Compiling DequeModule Deque+Descriptions.swift
[44/82] Compiling DequeModule Deque+Equatable.swift
[45/82] Compiling DequeModule _DequeBuffer.swift
[46/82] Compiling DequeModule _DequeBufferHeader.swift
[47/82] Compiling DequeModule Deque+ExpressibleByArrayLiteral.swift
[48/82] Compiling DequeModule Deque+Extras.swift
[50/82] Compiling DequeModule Deque+Hashable.swift
[51/82] Compiling DequeModule Deque+Sendable.swift
[52/82] Compiling DequeModule Deque+Testing.swift
[53/82] Compiling DequeModule Deque._Storage.swift
[54/82] Compiling DequeModule Deque._UnsafeHandle.swift
[55/82] Compiling DequeModule Deque.swift
[56/82] Compiling _NIODataStructures _TinyArray.swift
[57/82] Emitting module _NIODataStructures
[58/82] Compiling _NIODataStructures Heap.swift
[69/84] Compiling Atomics IntegerOperations.swift
[70/84] Compiling Atomics Unmanaged extensions.swift
[73/84] Compiling DequeModule Deque+Codable.swift
[74/84] Compiling DequeModule Deque+Collection.swift
[75/84] Compiling DequeModule Deque+CustomReflectable.swift
[76/84] Compiling DequeModule _DequeSlot.swift
[77/84] Compiling DequeModule _UnsafeWrappedBuffer.swift
[78/84] Emitting module DequeModule
[79/84] Emitting module Atomics
[82/84] Compiling c-nioatomics.c
[83/84] Compiling c-atomics.c
[85/90] Compiling NIOConcurrencyHelpers lock.swift
[86/90] Compiling NIOConcurrencyHelpers NIOLockedValueBox.swift
[87/90] Compiling NIOConcurrencyHelpers NIOLock.swift
[88/90] Emitting module NIOConcurrencyHelpers
[89/90] Compiling NIOConcurrencyHelpers NIOAtomic.swift
[90/90] Compiling NIOConcurrencyHelpers atomics.swift
[91/147] Compiling NIOCore GlobalSingletons.swift
[92/147] Compiling NIOCore IO.swift
[93/147] Compiling NIOCore IOData.swift
[94/147] Compiling NIOCore IPProtocol.swift
[95/147] Compiling NIOCore IntegerBitPacking.swift
[96/147] Compiling NIOCore IntegerTypes.swift
[97/147] Compiling NIOCore Interfaces.swift
[98/147] Compiling NIOCore Linux.swift
[99/155] Compiling NIOCore AddressedEnvelope.swift
[100/155] Compiling NIOCore AsyncAwaitSupport.swift
[101/155] Compiling NIOCore AsyncChannel.swift
[102/155] Compiling NIOCore AsyncChannelInboundStream.swift
[103/155] Compiling NIOCore AsyncChannelInboundStreamChannelHandler.swift
[104/155] Compiling NIOCore AsyncChannelOutboundWriter.swift
[105/155] Compiling NIOCore AsyncChannelOutboundWriterHandler.swift
[106/155] Compiling NIOCore NIOAsyncSequenceProducer.swift
[107/155] Compiling NIOCore EventLoop+SerialExecutor.swift
[108/155] Compiling NIOCore EventLoop.swift
[109/155] Compiling NIOCore EventLoopFuture+Deprecated.swift
[110/155] Compiling NIOCore EventLoopFuture+WithEventLoop.swift
[111/155] Compiling NIOCore EventLoopFuture.swift
[112/155] Compiling NIOCore FileDescriptor.swift
[113/155] Compiling NIOCore FileHandle.swift
[114/155] Compiling NIOCore FileRegion.swift
[115/155] Compiling NIOCore MarkedCircularBuffer.swift
[116/155] Compiling NIOCore MulticastChannel.swift
[117/155] Compiling NIOCore NIOAny.swift
[118/155] Compiling NIOCore NIOCloseOnErrorHandler.swift
[119/155] Compiling NIOCore NIOLoopBound.swift
[120/155] Compiling NIOCore NIOSendable.swift
[121/155] Compiling NIOCore PointerHelpers.swift
[122/155] Compiling NIOCore RecvByteBufferAllocator.swift
[123/155] Compiling NIOCore ChannelOption.swift
[124/155] Compiling NIOCore ChannelPipeline.swift
[125/155] Compiling NIOCore CircularBuffer.swift
[126/155] Compiling NIOCore Codec.swift
[127/155] Compiling NIOCore ConvenienceOptionSupport.swift
[128/155] Compiling NIOCore DeadChannel.swift
[129/155] Compiling NIOCore DispatchQueue+WithFuture.swift
[130/155] Compiling NIOCore EventLoop+Deprecated.swift
[131/155] Compiling NIOCore SingleStepByteToMessageDecoder.swift
[132/155] Compiling NIOCore SocketAddresses.swift
[133/155] Compiling NIOCore SocketOptionProvider.swift
[134/155] Compiling NIOCore SystemCallHelpers.swift
[135/155] Compiling NIOCore TimeAmount+Duration.swift
[136/155] Compiling NIOCore TypeAssistedChannelHandler.swift
[137/155] Compiling NIOCore UniversalBootstrapSupport.swift
[138/155] Compiling NIOCore Utilities.swift
[139/155] Compiling NIOCore NIOAsyncSequenceProducerStrategies.swift
[140/155] Compiling NIOCore NIOAsyncWriter.swift
[141/155] Compiling NIOCore NIOThrowingAsyncSequenceProducer.swift
[142/155] Compiling NIOCore BSDSocketAPI.swift
[143/155] Compiling NIOCore ByteBuffer-aux.swift
[144/155] Compiling NIOCore ByteBuffer-conversions.swift
[145/155] Compiling NIOCore ByteBuffer-core.swift
[146/155] Compiling NIOCore ByteBuffer-hexdump.swift
[147/155] Compiling NIOCore ByteBuffer-int.swift
[148/155] Compiling NIOCore ByteBuffer-lengthPrefix.swift
[149/155] Compiling NIOCore ByteBuffer-multi-int.swift
[150/155] Compiling NIOCore ByteBuffer-views.swift
[151/155] Compiling NIOCore Channel.swift
[152/155] Compiling NIOCore ChannelHandler.swift
[153/155] Compiling NIOCore ChannelHandlers.swift
[154/155] Compiling NIOCore ChannelInvoker.swift
[155/155] Emitting module NIOCore
[156/206] Compiling NIOEmbedded AsyncTestingEventLoop.swift
[157/206] Compiling NIOEmbedded AsyncTestingChannel.swift
[158/206] Emitting module NIOEmbedded
[159/206] Compiling NIOEmbedded Embedded.swift
[160/206] Compiling NIOPosix IntegerBitPacking.swift
[161/206] Compiling NIOPosix IntegerTypes.swift
[162/206] Compiling NIOPosix Linux.swift
[163/206] Compiling NIOPosix LinuxCPUSet.swift
[164/206] Compiling NIOPosix LinuxUring.swift
[165/206] Compiling NIOPosix MultiThreadedEventLoopGroup.swift
[166/206] Compiling NIOPosix NIOThreadPool.swift
[167/212] Compiling NIOPosix SelectableChannel.swift
[168/212] Compiling NIOPosix SelectableEventLoop.swift
[169/212] Compiling NIOPosix SelectorEpoll.swift
[170/212] Compiling NIOPosix SelectorGeneric.swift
[171/212] Compiling NIOPosix SelectorKqueue.swift
[172/212] Compiling NIOPosix SelectorUring.swift
[173/212] Compiling NIOPosix ServerSocket.swift
[174/212] Compiling NIOPosix Socket.swift
[175/212] Compiling NIOPosix SocketChannel.swift
[176/212] Compiling NIOPosix SocketProtocols.swift
[177/212] Compiling NIOPosix System.swift
[178/212] Compiling NIOPosix Thread.swift
[179/212] Compiling NIOPosix ThreadPosix.swift
[180/212] Compiling NIOPosix ThreadWindows.swift
[181/212] Compiling NIOPosix UnsafeTransfer.swift
[182/212] Compiling NIOPosix Utilities.swift
[183/212] Compiling NIOPosix VsockAddress.swift
[184/212] Compiling NIOPosix VsockChannelEvents.swift
[185/212] Compiling NIOPosix BSDSocketAPICommon.swift
[186/212] Compiling NIOPosix BSDSocketAPIPosix.swift
[187/212] Compiling NIOPosix BSDSocketAPIWindows.swift
[188/212] Compiling NIOPosix BaseSocket.swift
[189/212] Compiling NIOPosix BaseSocketChannel+SocketOptionProvider.swift
[190/212] Compiling NIOPosix BaseSocketChannel.swift
[191/212] Compiling NIOPosix BaseStreamSocketChannel.swift
[192/212] Compiling NIOPosix Bootstrap.swift
[193/212] Compiling NIOPosix ControlMessage.swift
[194/212] Compiling NIOPosix DatagramVectorReadManager.swift
[195/212] Compiling NIOPosix FileDescriptor.swift
[196/212] Compiling NIOPosix GetaddrinfoResolver.swift
[197/212] Compiling NIOPosix HappyEyeballs.swift
[198/212] Compiling NIOPosix IO.swift
[199/212] Emitting module NIOPosix
[200/212] Compiling NIOPosix PooledRecvBufferAllocator.swift
[201/212] Compiling NIOPosix PosixSingletons+ConcurrencyTakeOver.swift
[202/212] Compiling NIOPosix PosixSingletons.swift
[203/212] Compiling NIOPosix RawSocketBootstrap.swift
[204/212] Compiling NIOPosix Resolver.swift
[205/212] Compiling NIOPosix Selectable.swift
[206/212] Compiling NIOPosix NonBlockingFileIO.swift
[207/212] Compiling NIOPosix PendingDatagramWritesManager.swift
[208/212] Compiling NIOPosix PendingWritesManager.swift
[209/212] Compiling NIOPosix PipeChannel.swift
[210/212] Compiling NIOPosix PipePair.swift
[211/212] Compiling NIOPosix PointerHelpers.swift
[212/212] Compiling NIOPosix Pool.swift
[213/214] Emitting module NIO
[214/214] Compiling NIO Exports.swift
error: emit-module command failed with exit code 1 (use -v to see invocation)
[215/231] Emitting module BlockchainSwift
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:119:27: error: 'NWListener' is only available in macOS 10.14 or newer
    private var listener: NWListener?
                          ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:116:14: note: add @available attribute to enclosing class
public class NWNetwork: NetworkProvider {
             ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:169:52: error: 'NWConnection' is only available in macOS 10.14 or newer
    private func handleConnection(_ newConnection: NWConnection) {
                                                   ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:169:18: note: add @available attribute to enclosing instance method
    private func handleConnection(_ newConnection: NWConnection) {
                 ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:116:14: note: add @available attribute to enclosing class
public class NWNetwork: NetworkProvider {
             ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:186:11: error: 'NWEndpoint' is only available in macOS 10.14 or newer
extension NWEndpoint {
          ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:186:1: note: add @available attribute to enclosing extension
extension NWEndpoint {
^
[216/233] Compiling BlockchainSwift Keygen.swift
[217/233] Compiling BlockchainSwift Keysign.swift
[218/233] Compiling BlockchainSwift Block.swift
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Core/Serialization.swift:25:33: warning: initialization of 'UnsafeBufferPointer<Self>' results in a dangling buffer pointer
        let data = Data(buffer: UnsafeBufferPointer(start: &value, count: 1))
                                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Core/Serialization.swift:25:60: note: implicit argument conversion from 'Self' to 'UnsafePointer<Self>?' produces a pointer valid only for the duration of the call to 'init(start:count:)'
        let data = Data(buffer: UnsafeBufferPointer(start: &value, count: 1))
                                                           ^~~~~~
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Core/Serialization.swift:25:60: note: use 'withUnsafePointer' in order to explicitly convert argument to pointer valid for a defined scope
        let data = Data(buffer: UnsafeBufferPointer(start: &value, count: 1))
                                                           ^
[219/233] Compiling BlockchainSwift Blockchain.swift
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Core/Serialization.swift:25:33: warning: initialization of 'UnsafeBufferPointer<Self>' results in a dangling buffer pointer
        let data = Data(buffer: UnsafeBufferPointer(start: &value, count: 1))
                                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Core/Serialization.swift:25:60: note: implicit argument conversion from 'Self' to 'UnsafePointer<Self>?' produces a pointer valid only for the duration of the call to 'init(start:count:)'
        let data = Data(buffer: UnsafeBufferPointer(start: &value, count: 1))
                                                           ^~~~~~
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Core/Serialization.swift:25:60: note: use 'withUnsafePointer' in order to explicitly convert argument to pointer valid for a defined scope
        let data = Data(buffer: UnsafeBufferPointer(start: &value, count: 1))
                                                           ^
[220/233] Compiling BlockchainSwift Serialization.swift
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Core/Serialization.swift:25:33: warning: initialization of 'UnsafeBufferPointer<Self>' results in a dangling buffer pointer
        let data = Data(buffer: UnsafeBufferPointer(start: &value, count: 1))
                                ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Core/Serialization.swift:25:60: note: implicit argument conversion from 'Self' to 'UnsafePointer<Self>?' produces a pointer valid only for the duration of the call to 'init(start:count:)'
        let data = Data(buffer: UnsafeBufferPointer(start: &value, count: 1))
                                                           ^~~~~~
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Core/Serialization.swift:25:60: note: use 'withUnsafePointer' in order to explicitly convert argument to pointer valid for a defined scope
        let data = Data(buffer: UnsafeBufferPointer(start: &value, count: 1))
                                                           ^
[221/233] Compiling BlockchainSwift Node.swift
[222/233] Compiling BlockchainSwift NodeAddress.swift
[223/233] Compiling BlockchainSwift Messages.swift
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:119:27: error: 'NWListener' is only available in macOS 10.14 or newer
    private var listener: NWListener?
                          ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:116:14: note: add @available attribute to enclosing class
public class NWNetwork: NetworkProvider {
             ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:169:52: error: 'NWConnection' is only available in macOS 10.14 or newer
    private func handleConnection(_ newConnection: NWConnection) {
                                                   ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:169:18: note: add @available attribute to enclosing instance method
    private func handleConnection(_ newConnection: NWConnection) {
                 ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:116:14: note: add @available attribute to enclosing class
public class NWNetwork: NetworkProvider {
             ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:186:11: error: 'NWEndpoint' is only available in macOS 10.14 or newer
extension NWEndpoint {
          ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:186:1: note: add @available attribute to enclosing extension
extension NWEndpoint {
^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:133:25: error: 'NWListener' is only available in macOS 10.14 or newer
        listener = try! NWListener(using: .tcp, on: NWEndpoint.Port(rawValue: UInt16(port))!)
                        ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:133:25: note: add 'if #available' version check
        listener = try! NWListener(using: .tcp, on: NWEndpoint.Port(rawValue: UInt16(port))!)
                        ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:131:10: note: add @available attribute to enclosing instance method
    func start() {
         ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:116:14: note: add @available attribute to enclosing class
public class NWNetwork: NetworkProvider {
             ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:133:53: error: 'NWEndpoint' is only available in macOS 10.14 or newer
        listener = try! NWListener(using: .tcp, on: NWEndpoint.Port(rawValue: UInt16(port))!)
                                                    ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:133:53: note: add 'if #available' version check
        listener = try! NWListener(using: .tcp, on: NWEndpoint.Port(rawValue: UInt16(port))!)
                                                    ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:131:10: note: add @available attribute to enclosing instance method
    func start() {
         ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:116:14: note: add @available attribute to enclosing class
public class NWNetwork: NetworkProvider {
             ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:153:24: error: 'NWEndpoint' is only available in macOS 10.14 or newer
        let endpoint = NWEndpoint.hostPort(host: NWEndpoint.Host(to.host), port: NWEndpoint.Port(rawValue: UInt16(to.port))!)
                       ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:153:24: note: add 'if #available' version check
        let endpoint = NWEndpoint.hostPort(host: NWEndpoint.Host(to.host), port: NWEndpoint.Port(rawValue: UInt16(to.port))!)
                       ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:151:19: note: add @available attribute to enclosing instance method
    internal func send(command: Message.Command, payload: Serializable, to: NodeAddress, completion: ((Bool) -> Void)? = nil) {
                  ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:116:14: note: add @available attribute to enclosing class
public class NWNetwork: NetworkProvider {
             ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:153:50: error: 'NWEndpoint' is only available in macOS 10.14 or newer
        let endpoint = NWEndpoint.hostPort(host: NWEndpoint.Host(to.host), port: NWEndpoint.Port(rawValue: UInt16(to.port))!)
                                                 ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:153:50: note: add 'if #available' version check
        let endpoint = NWEndpoint.hostPort(host: NWEndpoint.Host(to.host), port: NWEndpoint.Port(rawValue: UInt16(to.port))!)
                                                 ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:151:19: note: add @available attribute to enclosing instance method
    internal func send(command: Message.Command, payload: Serializable, to: NodeAddress, completion: ((Bool) -> Void)? = nil) {
                  ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:116:14: note: add @available attribute to enclosing class
public class NWNetwork: NetworkProvider {
             ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:153:82: error: 'NWEndpoint' is only available in macOS 10.14 or newer
        let endpoint = NWEndpoint.hostPort(host: NWEndpoint.Host(to.host), port: NWEndpoint.Port(rawValue: UInt16(to.port))!)
                                                                                 ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:153:82: note: add 'if #available' version check
        let endpoint = NWEndpoint.hostPort(host: NWEndpoint.Host(to.host), port: NWEndpoint.Port(rawValue: UInt16(to.port))!)
                                                                                 ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:151:19: note: add @available attribute to enclosing instance method
    internal func send(command: Message.Command, payload: Serializable, to: NodeAddress, completion: ((Bool) -> Void)? = nil) {
                  ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:116:14: note: add @available attribute to enclosing class
public class NWNetwork: NetworkProvider {
             ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:154:26: error: 'NWConnection' is only available in macOS 10.14 or newer
        let connection = NWConnection(to: endpoint, using: .tcp)
                         ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:154:26: note: add 'if #available' version check
        let connection = NWConnection(to: endpoint, using: .tcp)
                         ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:151:19: note: add @available attribute to enclosing instance method
    internal func send(command: Message.Command, payload: Serializable, to: NodeAddress, completion: ((Bool) -> Void)? = nil) {
                  ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:116:14: note: add @available attribute to enclosing class
public class NWNetwork: NetworkProvider {
             ^
[224/233] Compiling BlockchainSwift Network.swift
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:119:27: error: 'NWListener' is only available in macOS 10.14 or newer
    private var listener: NWListener?
                          ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:116:14: note: add @available attribute to enclosing class
public class NWNetwork: NetworkProvider {
             ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:169:52: error: 'NWConnection' is only available in macOS 10.14 or newer
    private func handleConnection(_ newConnection: NWConnection) {
                                                   ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:169:18: note: add @available attribute to enclosing instance method
    private func handleConnection(_ newConnection: NWConnection) {
                 ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:116:14: note: add @available attribute to enclosing class
public class NWNetwork: NetworkProvider {
             ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:186:11: error: 'NWEndpoint' is only available in macOS 10.14 or newer
extension NWEndpoint {
          ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:186:1: note: add @available attribute to enclosing extension
extension NWEndpoint {
^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:133:25: error: 'NWListener' is only available in macOS 10.14 or newer
        listener = try! NWListener(using: .tcp, on: NWEndpoint.Port(rawValue: UInt16(port))!)
                        ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:133:25: note: add 'if #available' version check
        listener = try! NWListener(using: .tcp, on: NWEndpoint.Port(rawValue: UInt16(port))!)
                        ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:131:10: note: add @available attribute to enclosing instance method
    func start() {
         ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:116:14: note: add @available attribute to enclosing class
public class NWNetwork: NetworkProvider {
             ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:133:53: error: 'NWEndpoint' is only available in macOS 10.14 or newer
        listener = try! NWListener(using: .tcp, on: NWEndpoint.Port(rawValue: UInt16(port))!)
                                                    ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:133:53: note: add 'if #available' version check
        listener = try! NWListener(using: .tcp, on: NWEndpoint.Port(rawValue: UInt16(port))!)
                                                    ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:131:10: note: add @available attribute to enclosing instance method
    func start() {
         ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:116:14: note: add @available attribute to enclosing class
public class NWNetwork: NetworkProvider {
             ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:153:24: error: 'NWEndpoint' is only available in macOS 10.14 or newer
        let endpoint = NWEndpoint.hostPort(host: NWEndpoint.Host(to.host), port: NWEndpoint.Port(rawValue: UInt16(to.port))!)
                       ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:153:24: note: add 'if #available' version check
        let endpoint = NWEndpoint.hostPort(host: NWEndpoint.Host(to.host), port: NWEndpoint.Port(rawValue: UInt16(to.port))!)
                       ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:151:19: note: add @available attribute to enclosing instance method
    internal func send(command: Message.Command, payload: Serializable, to: NodeAddress, completion: ((Bool) -> Void)? = nil) {
                  ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:116:14: note: add @available attribute to enclosing class
public class NWNetwork: NetworkProvider {
             ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:153:50: error: 'NWEndpoint' is only available in macOS 10.14 or newer
        let endpoint = NWEndpoint.hostPort(host: NWEndpoint.Host(to.host), port: NWEndpoint.Port(rawValue: UInt16(to.port))!)
                                                 ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:153:50: note: add 'if #available' version check
        let endpoint = NWEndpoint.hostPort(host: NWEndpoint.Host(to.host), port: NWEndpoint.Port(rawValue: UInt16(to.port))!)
                                                 ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:151:19: note: add @available attribute to enclosing instance method
    internal func send(command: Message.Command, payload: Serializable, to: NodeAddress, completion: ((Bool) -> Void)? = nil) {
                  ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:116:14: note: add @available attribute to enclosing class
public class NWNetwork: NetworkProvider {
             ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:153:82: error: 'NWEndpoint' is only available in macOS 10.14 or newer
        let endpoint = NWEndpoint.hostPort(host: NWEndpoint.Host(to.host), port: NWEndpoint.Port(rawValue: UInt16(to.port))!)
                                                                                 ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:153:82: note: add 'if #available' version check
        let endpoint = NWEndpoint.hostPort(host: NWEndpoint.Host(to.host), port: NWEndpoint.Port(rawValue: UInt16(to.port))!)
                                                                                 ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:151:19: note: add @available attribute to enclosing instance method
    internal func send(command: Message.Command, payload: Serializable, to: NodeAddress, completion: ((Bool) -> Void)? = nil) {
                  ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:116:14: note: add @available attribute to enclosing class
public class NWNetwork: NetworkProvider {
             ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:154:26: error: 'NWConnection' is only available in macOS 10.14 or newer
        let connection = NWConnection(to: endpoint, using: .tcp)
                         ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:154:26: note: add 'if #available' version check
        let connection = NWConnection(to: endpoint, using: .tcp)
                         ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:151:19: note: add @available attribute to enclosing instance method
    internal func send(command: Message.Command, payload: Serializable, to: NodeAddress, completion: ((Bool) -> Void)? = nil) {
                  ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:116:14: note: add @available attribute to enclosing class
public class NWNetwork: NetworkProvider {
             ^
[225/233] Compiling BlockchainSwift ProofOfWork.swift
[226/233] Compiling BlockchainSwift Wallet.swift
[227/233] Compiling BlockchainSwift Transaction.swift
[228/233] Compiling BlockchainSwift TransactionInput.swift
[229/233] Compiling BlockchainSwift TransactionOutputReference.swift
[230/233] Compiling BlockchainSwift TransationOutput.swift
[231/233] Compiling BlockchainSwift UnspentTransaction.swift
[232/233] Compiling BlockchainSwift QRCodeConvertible.swift
[233/233] Compiling BlockchainSwift SHA.swift
error: fatalError
Fetching https://github.com/apple/swift-nio.git from cache
Fetched https://github.com/apple/swift-nio.git from cache (0.31s)
Computing version for https://github.com/apple/swift-nio.git
Computed https://github.com/apple/swift-nio.git at 2.63.0 (0.46s)
Fetching https://github.com/apple/swift-atomics.git from cache
Fetching https://github.com/apple/swift-system.git from cache
Fetching https://github.com/apple/swift-collections.git from cache
Fetched https://github.com/apple/swift-collections.git from cache (0.19s)
Fetched https://github.com/apple/swift-atomics.git from cache (0.19s)
Fetched https://github.com/apple/swift-system.git from cache (0.19s)
Computing version for https://github.com/apple/swift-system.git
Computed https://github.com/apple/swift-system.git at 1.2.1 (0.02s)
Computing version for https://github.com/apple/swift-atomics.git
Computed https://github.com/apple/swift-atomics.git at 1.2.0 (0.04s)
Computing version for https://github.com/apple/swift-collections.git
Computed https://github.com/apple/swift-collections.git at 1.1.0 (0.03s)
Creating working copy for https://github.com/apple/swift-collections.git
Working copy of https://github.com/apple/swift-collections.git resolved at 1.1.0
Creating working copy for https://github.com/apple/swift-atomics.git
Working copy of https://github.com/apple/swift-atomics.git resolved at 1.2.0
Creating working copy for https://github.com/apple/swift-system.git
Working copy of https://github.com/apple/swift-system.git resolved at 1.2.1
Creating working copy for https://github.com/apple/swift-nio.git
Working copy of https://github.com/apple/swift-nio.git resolved at 2.63.0
[0/1] Planning build
Building for debugging...
[0/1] Write swift-version--423B1241ED78D482.txt
error: emit-module command failed with exit code 1 (use -v to see invocation)
[2/4] Emitting module BlockchainSwift
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:119:27: error: 'NWListener' is only available in macOS 10.14 or newer
    private var listener: NWListener?
                          ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:116:14: note: add @available attribute to enclosing class
public class NWNetwork: NetworkProvider {
             ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:169:52: error: 'NWConnection' is only available in macOS 10.14 or newer
    private func handleConnection(_ newConnection: NWConnection) {
                                                   ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:169:18: note: add @available attribute to enclosing instance method
    private func handleConnection(_ newConnection: NWConnection) {
                 ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:116:14: note: add @available attribute to enclosing class
public class NWNetwork: NetworkProvider {
             ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:186:11: error: 'NWEndpoint' is only available in macOS 10.14 or newer
extension NWEndpoint {
          ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:186:1: note: add @available attribute to enclosing extension
extension NWEndpoint {
^
[3/4] Compiling BlockchainSwift Messages.swift
[4/4] Compiling BlockchainSwift Network.swift
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:119:27: error: 'NWListener' is only available in macOS 10.14 or newer
    private var listener: NWListener?
                          ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:116:14: note: add @available attribute to enclosing class
public class NWNetwork: NetworkProvider {
             ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:169:52: error: 'NWConnection' is only available in macOS 10.14 or newer
    private func handleConnection(_ newConnection: NWConnection) {
                                                   ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:169:18: note: add @available attribute to enclosing instance method
    private func handleConnection(_ newConnection: NWConnection) {
                 ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:116:14: note: add @available attribute to enclosing class
public class NWNetwork: NetworkProvider {
             ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:186:11: error: 'NWEndpoint' is only available in macOS 10.14 or newer
extension NWEndpoint {
          ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:186:1: note: add @available attribute to enclosing extension
extension NWEndpoint {
^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:133:25: error: 'NWListener' is only available in macOS 10.14 or newer
        listener = try! NWListener(using: .tcp, on: NWEndpoint.Port(rawValue: UInt16(port))!)
                        ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:133:25: note: add 'if #available' version check
        listener = try! NWListener(using: .tcp, on: NWEndpoint.Port(rawValue: UInt16(port))!)
                        ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:131:10: note: add @available attribute to enclosing instance method
    func start() {
         ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:116:14: note: add @available attribute to enclosing class
public class NWNetwork: NetworkProvider {
             ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:133:53: error: 'NWEndpoint' is only available in macOS 10.14 or newer
        listener = try! NWListener(using: .tcp, on: NWEndpoint.Port(rawValue: UInt16(port))!)
                                                    ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:133:53: note: add 'if #available' version check
        listener = try! NWListener(using: .tcp, on: NWEndpoint.Port(rawValue: UInt16(port))!)
                                                    ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:131:10: note: add @available attribute to enclosing instance method
    func start() {
         ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:116:14: note: add @available attribute to enclosing class
public class NWNetwork: NetworkProvider {
             ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:153:24: error: 'NWEndpoint' is only available in macOS 10.14 or newer
        let endpoint = NWEndpoint.hostPort(host: NWEndpoint.Host(to.host), port: NWEndpoint.Port(rawValue: UInt16(to.port))!)
                       ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:153:24: note: add 'if #available' version check
        let endpoint = NWEndpoint.hostPort(host: NWEndpoint.Host(to.host), port: NWEndpoint.Port(rawValue: UInt16(to.port))!)
                       ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:151:19: note: add @available attribute to enclosing instance method
    internal func send(command: Message.Command, payload: Serializable, to: NodeAddress, completion: ((Bool) -> Void)? = nil) {
                  ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:116:14: note: add @available attribute to enclosing class
public class NWNetwork: NetworkProvider {
             ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:153:50: error: 'NWEndpoint' is only available in macOS 10.14 or newer
        let endpoint = NWEndpoint.hostPort(host: NWEndpoint.Host(to.host), port: NWEndpoint.Port(rawValue: UInt16(to.port))!)
                                                 ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:153:50: note: add 'if #available' version check
        let endpoint = NWEndpoint.hostPort(host: NWEndpoint.Host(to.host), port: NWEndpoint.Port(rawValue: UInt16(to.port))!)
                                                 ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:151:19: note: add @available attribute to enclosing instance method
    internal func send(command: Message.Command, payload: Serializable, to: NodeAddress, completion: ((Bool) -> Void)? = nil) {
                  ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:116:14: note: add @available attribute to enclosing class
public class NWNetwork: NetworkProvider {
             ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:153:82: error: 'NWEndpoint' is only available in macOS 10.14 or newer
        let endpoint = NWEndpoint.hostPort(host: NWEndpoint.Host(to.host), port: NWEndpoint.Port(rawValue: UInt16(to.port))!)
                                                                                 ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:153:82: note: add 'if #available' version check
        let endpoint = NWEndpoint.hostPort(host: NWEndpoint.Host(to.host), port: NWEndpoint.Port(rawValue: UInt16(to.port))!)
                                                                                 ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:151:19: note: add @available attribute to enclosing instance method
    internal func send(command: Message.Command, payload: Serializable, to: NodeAddress, completion: ((Bool) -> Void)? = nil) {
                  ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:116:14: note: add @available attribute to enclosing class
public class NWNetwork: NetworkProvider {
             ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:154:26: error: 'NWConnection' is only available in macOS 10.14 or newer
        let connection = NWConnection(to: endpoint, using: .tcp)
                         ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:154:26: note: add 'if #available' version check
        let connection = NWConnection(to: endpoint, using: .tcp)
                         ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:151:19: note: add @available attribute to enclosing instance method
    internal func send(command: Message.Command, payload: Serializable, to: NodeAddress, completion: ((Bool) -> Void)? = nil) {
                  ^
/Users/builder/builds/UKfvDsi8u/1/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/Network.swift:116:14: note: add @available attribute to enclosing class
public class NWNetwork: NetworkProvider {
             ^
[5/5] Compiling BlockchainSwift Node.swift
error: fatalError
BUILD FAILURE 5.10 macosSpm