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: 0.2.0
Initialized empty Git repository in /Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/.git/
From https://github.com/nevstad/blockchain-swift
 * tag               0.2.0      -> FETCH_HEAD
HEAD is now at a7216ed Merge pull request #1 from nevstad/feature/network
Cloned https://github.com/nevstad/blockchain-swift.git
Revision (git rev-parse @):
a7216eda4b2f598f190b49bbb325bfefa34b244c
SUCCESS checkout https://github.com/nevstad/blockchain-swift.git at 0.2.0
========================================
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...
[0/2] Write sources
[1/2] Write swift-version--423B1241ED78D482.txt
[3/17] Compiling BlockchainSwift SHA.swift
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:22:31: error: 'NWConnection' is only available in macOS 10.14 or newer
    public var connections = [NWConnection]()
                              ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:19:14: note: add @available attribute to enclosing class
public class NodeServer {
             ^
[4/17] Compiling BlockchainSwift Node.swift
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:22:31: error: 'NWConnection' is only available in macOS 10.14 or newer
    public var connections = [NWConnection]()
                              ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:19:14: note: add @available attribute to enclosing class
public class NodeServer {
             ^
error: emit-module command failed with exit code 1 (use -v to see invocation)
[5/19] Compiling BlockchainSwift TransactionInput.swift
[6/19] Compiling BlockchainSwift TransactionOutPoint.swift
[7/19] Emitting module BlockchainSwift
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:15:33: error: 'NWConnection' is only available in macOS 10.14 or newer
    public init(stateHandler: ((NWConnection.State) -> Void)? = nil) {
                                ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:15:12: note: add @available attribute to enclosing initializer
    public init(stateHandler: ((NWConnection.State) -> Void)? = nil) {
           ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:12:14: note: add @available attribute to enclosing class
public class NodeClient {
             ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:19:53: error: 'NWConnection' is only available in macOS 10.14 or newer
    private func openConnection(to: NodeAddress) -> NWConnection {
                                                    ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:19:18: note: add @available attribute to enclosing instance method
    private func openConnection(to: NodeAddress) -> NWConnection {
                 ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:12:14: note: add @available attribute to enclosing class
public class NodeClient {
             ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:20:26: error: 'NWListener' is only available in macOS 10.14 or newer
    public let listener: NWListener
                         ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:19:14: note: add @available attribute to enclosing class
public class NodeServer {
             ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:22:31: error: 'NWConnection' is only available in macOS 10.14 or newer
    public var connections = [NWConnection]()
                              ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:19:14: note: add @available attribute to enclosing class
public class NodeServer {
             ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:26:40: error: 'NWListener' is only available in macOS 10.14 or newer
    init(port: UInt16, stateHandler: ((NWListener.State) -> Void)? = nil) {
                                       ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:26:5: note: add @available attribute to enclosing initializer
    init(port: UInt16, stateHandler: ((NWListener.State) -> Void)? = nil) {
    ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:19:14: note: add @available attribute to enclosing class
public class NodeServer {
             ^
[8/19] Compiling BlockchainSwift Serialization.swift
/Users/builder/builds/UKfvDsi8u/3/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/3/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/3/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))
                                                           ^
[9/19] Compiling BlockchainSwift Transaction.swift
/Users/builder/builds/UKfvDsi8u/3/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/3/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/3/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))
                                                           ^
[10/19] Compiling BlockchainSwift Block.swift
[11/19] Compiling BlockchainSwift Blockchain.swift
[12/19] Compiling BlockchainSwift TransationOutput.swift
[13/19] Compiling BlockchainSwift ECDSA.swift
[14/19] Compiling BlockchainSwift NodeMessages.swift
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:20:26: error: 'NWListener' is only available in macOS 10.14 or newer
    public let listener: NWListener
                         ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:19:14: note: add @available attribute to enclosing class
public class NodeServer {
             ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:22:31: error: 'NWConnection' is only available in macOS 10.14 or newer
    public var connections = [NWConnection]()
                              ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:19:14: note: add @available attribute to enclosing class
public class NodeServer {
             ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:26:40: error: 'NWListener' is only available in macOS 10.14 or newer
    init(port: UInt16, stateHandler: ((NWListener.State) -> Void)? = nil) {
                                       ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:26:5: note: add @available attribute to enclosing initializer
    init(port: UInt16, stateHandler: ((NWListener.State) -> Void)? = nil) {
    ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:19:14: note: add @available attribute to enclosing class
public class NodeServer {
             ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:28:30: error: 'NWListener' is only available in macOS 10.14 or newer
        self.listener = try! NWListener(using: .udp, on: NWEndpoint.Port(rawValue: port)!)
                             ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:28:30: note: add 'if #available' version check
        self.listener = try! NWListener(using: .udp, on: NWEndpoint.Port(rawValue: port)!)
                             ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:26:5: note: add @available attribute to enclosing initializer
    init(port: UInt16, stateHandler: ((NWListener.State) -> Void)? = nil) {
    ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:19:14: note: add @available attribute to enclosing class
public class NodeServer {
             ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:28:58: error: 'NWEndpoint' is only available in macOS 10.14 or newer
        self.listener = try! NWListener(using: .udp, on: NWEndpoint.Port(rawValue: port)!)
                                                         ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:28:58: note: add 'if #available' version check
        self.listener = try! NWListener(using: .udp, on: NWEndpoint.Port(rawValue: port)!)
                                                         ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:26:5: note: add @available attribute to enclosing initializer
    init(port: UInt16, stateHandler: ((NWListener.State) -> Void)? = nil) {
    ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:19:14: note: add @available attribute to enclosing class
public class NodeServer {
             ^
[15/19] Compiling BlockchainSwift NodeServer.swift
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:20:26: error: 'NWListener' is only available in macOS 10.14 or newer
    public let listener: NWListener
                         ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:19:14: note: add @available attribute to enclosing class
public class NodeServer {
             ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:22:31: error: 'NWConnection' is only available in macOS 10.14 or newer
    public var connections = [NWConnection]()
                              ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:19:14: note: add @available attribute to enclosing class
public class NodeServer {
             ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:26:40: error: 'NWListener' is only available in macOS 10.14 or newer
    init(port: UInt16, stateHandler: ((NWListener.State) -> Void)? = nil) {
                                       ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:26:5: note: add @available attribute to enclosing initializer
    init(port: UInt16, stateHandler: ((NWListener.State) -> Void)? = nil) {
    ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:19:14: note: add @available attribute to enclosing class
public class NodeServer {
             ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:28:30: error: 'NWListener' is only available in macOS 10.14 or newer
        self.listener = try! NWListener(using: .udp, on: NWEndpoint.Port(rawValue: port)!)
                             ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:28:30: note: add 'if #available' version check
        self.listener = try! NWListener(using: .udp, on: NWEndpoint.Port(rawValue: port)!)
                             ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:26:5: note: add @available attribute to enclosing initializer
    init(port: UInt16, stateHandler: ((NWListener.State) -> Void)? = nil) {
    ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:19:14: note: add @available attribute to enclosing class
public class NodeServer {
             ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:28:58: error: 'NWEndpoint' is only available in macOS 10.14 or newer
        self.listener = try! NWListener(using: .udp, on: NWEndpoint.Port(rawValue: port)!)
                                                         ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:28:58: note: add 'if #available' version check
        self.listener = try! NWListener(using: .udp, on: NWEndpoint.Port(rawValue: port)!)
                                                         ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:26:5: note: add @available attribute to enclosing initializer
    init(port: UInt16, stateHandler: ((NWListener.State) -> Void)? = nil) {
    ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:19:14: note: add @available attribute to enclosing class
public class NodeServer {
             ^
[16/19] Compiling BlockchainSwift NodeAddress.swift
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:15:33: error: 'NWConnection' is only available in macOS 10.14 or newer
    public init(stateHandler: ((NWConnection.State) -> Void)? = nil) {
                                ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:15:12: note: add @available attribute to enclosing initializer
    public init(stateHandler: ((NWConnection.State) -> Void)? = nil) {
           ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:12:14: note: add @available attribute to enclosing class
public class NodeClient {
             ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:19:53: error: 'NWConnection' is only available in macOS 10.14 or newer
    private func openConnection(to: NodeAddress) -> NWConnection {
                                                    ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:19:18: note: add @available attribute to enclosing instance method
    private func openConnection(to: NodeAddress) -> NWConnection {
                 ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:12:14: note: add @available attribute to enclosing class
public class NodeClient {
             ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:20:24: 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/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:20:24: 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/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:19:18: note: add @available attribute to enclosing instance method
    private func openConnection(to: NodeAddress) -> NWConnection {
                 ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:12:14: note: add @available attribute to enclosing class
public class NodeClient {
             ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:20:50: 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/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:20:50: 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/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:19:18: note: add @available attribute to enclosing instance method
    private func openConnection(to: NodeAddress) -> NWConnection {
                 ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:12:14: note: add @available attribute to enclosing class
public class NodeClient {
             ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:20:82: 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/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:20:82: 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/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:19:18: note: add @available attribute to enclosing instance method
    private func openConnection(to: NodeAddress) -> NWConnection {
                 ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:12:14: note: add @available attribute to enclosing class
public class NodeClient {
             ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:21:26: error: 'NWConnection' is only available in macOS 10.14 or newer
        let connection = NWConnection(to: endpoint, using: .udp)
                         ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:21:26: note: add 'if #available' version check
        let connection = NWConnection(to: endpoint, using: .udp)
                         ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:19:18: note: add @available attribute to enclosing instance method
    private func openConnection(to: NodeAddress) -> NWConnection {
                 ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:12:14: note: add @available attribute to enclosing class
public class NodeClient {
             ^
[17/19] Compiling BlockchainSwift NodeClient.swift
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:15:33: error: 'NWConnection' is only available in macOS 10.14 or newer
    public init(stateHandler: ((NWConnection.State) -> Void)? = nil) {
                                ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:15:12: note: add @available attribute to enclosing initializer
    public init(stateHandler: ((NWConnection.State) -> Void)? = nil) {
           ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:12:14: note: add @available attribute to enclosing class
public class NodeClient {
             ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:19:53: error: 'NWConnection' is only available in macOS 10.14 or newer
    private func openConnection(to: NodeAddress) -> NWConnection {
                                                    ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:19:18: note: add @available attribute to enclosing instance method
    private func openConnection(to: NodeAddress) -> NWConnection {
                 ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:12:14: note: add @available attribute to enclosing class
public class NodeClient {
             ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:20:24: 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/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:20:24: 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/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:19:18: note: add @available attribute to enclosing instance method
    private func openConnection(to: NodeAddress) -> NWConnection {
                 ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:12:14: note: add @available attribute to enclosing class
public class NodeClient {
             ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:20:50: 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/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:20:50: 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/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:19:18: note: add @available attribute to enclosing instance method
    private func openConnection(to: NodeAddress) -> NWConnection {
                 ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:12:14: note: add @available attribute to enclosing class
public class NodeClient {
             ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:20:82: 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/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:20:82: 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/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:19:18: note: add @available attribute to enclosing instance method
    private func openConnection(to: NodeAddress) -> NWConnection {
                 ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:12:14: note: add @available attribute to enclosing class
public class NodeClient {
             ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:21:26: error: 'NWConnection' is only available in macOS 10.14 or newer
        let connection = NWConnection(to: endpoint, using: .udp)
                         ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:21:26: note: add 'if #available' version check
        let connection = NWConnection(to: endpoint, using: .udp)
                         ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:19:18: note: add @available attribute to enclosing instance method
    private func openConnection(to: NodeAddress) -> NWConnection {
                 ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:12:14: note: add @available attribute to enclosing class
public class NodeClient {
             ^
[18/19] Compiling BlockchainSwift ProofOfWork.swift
[19/19] Compiling BlockchainSwift Wallet.swift
error: fatalError
[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)
[2/8] Compiling BlockchainSwift NodeMessages.swift
[3/8] Compiling BlockchainSwift NodeAddress.swift
[4/8] Compiling BlockchainSwift SHA.swift
[5/8] Emitting module BlockchainSwift
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:15:33: error: 'NWConnection' is only available in macOS 10.14 or newer
    public init(stateHandler: ((NWConnection.State) -> Void)? = nil) {
                                ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:15:12: note: add @available attribute to enclosing initializer
    public init(stateHandler: ((NWConnection.State) -> Void)? = nil) {
           ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:12:14: note: add @available attribute to enclosing class
public class NodeClient {
             ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:19:53: error: 'NWConnection' is only available in macOS 10.14 or newer
    private func openConnection(to: NodeAddress) -> NWConnection {
                                                    ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:19:18: note: add @available attribute to enclosing instance method
    private func openConnection(to: NodeAddress) -> NWConnection {
                 ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:12:14: note: add @available attribute to enclosing class
public class NodeClient {
             ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:20:26: error: 'NWListener' is only available in macOS 10.14 or newer
    public let listener: NWListener
                         ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:19:14: note: add @available attribute to enclosing class
public class NodeServer {
             ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:22:31: error: 'NWConnection' is only available in macOS 10.14 or newer
    public var connections = [NWConnection]()
                              ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:19:14: note: add @available attribute to enclosing class
public class NodeServer {
             ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:26:40: error: 'NWListener' is only available in macOS 10.14 or newer
    init(port: UInt16, stateHandler: ((NWListener.State) -> Void)? = nil) {
                                       ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:26:5: note: add @available attribute to enclosing initializer
    init(port: UInt16, stateHandler: ((NWListener.State) -> Void)? = nil) {
    ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:19:14: note: add @available attribute to enclosing class
public class NodeServer {
             ^
[6/8] Compiling BlockchainSwift NodeServer.swift
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:20:26: error: 'NWListener' is only available in macOS 10.14 or newer
    public let listener: NWListener
                         ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:19:14: note: add @available attribute to enclosing class
public class NodeServer {
             ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:22:31: error: 'NWConnection' is only available in macOS 10.14 or newer
    public var connections = [NWConnection]()
                              ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:19:14: note: add @available attribute to enclosing class
public class NodeServer {
             ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:26:40: error: 'NWListener' is only available in macOS 10.14 or newer
    init(port: UInt16, stateHandler: ((NWListener.State) -> Void)? = nil) {
                                       ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:26:5: note: add @available attribute to enclosing initializer
    init(port: UInt16, stateHandler: ((NWListener.State) -> Void)? = nil) {
    ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:19:14: note: add @available attribute to enclosing class
public class NodeServer {
             ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:28:30: error: 'NWListener' is only available in macOS 10.14 or newer
        self.listener = try! NWListener(using: .udp, on: NWEndpoint.Port(rawValue: port)!)
                             ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:28:30: note: add 'if #available' version check
        self.listener = try! NWListener(using: .udp, on: NWEndpoint.Port(rawValue: port)!)
                             ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:26:5: note: add @available attribute to enclosing initializer
    init(port: UInt16, stateHandler: ((NWListener.State) -> Void)? = nil) {
    ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:19:14: note: add @available attribute to enclosing class
public class NodeServer {
             ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:28:58: error: 'NWEndpoint' is only available in macOS 10.14 or newer
        self.listener = try! NWListener(using: .udp, on: NWEndpoint.Port(rawValue: port)!)
                                                         ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:28:58: note: add 'if #available' version check
        self.listener = try! NWListener(using: .udp, on: NWEndpoint.Port(rawValue: port)!)
                                                         ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:26:5: note: add @available attribute to enclosing initializer
    init(port: UInt16, stateHandler: ((NWListener.State) -> Void)? = nil) {
    ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:19:14: note: add @available attribute to enclosing class
public class NodeServer {
             ^
[7/8] Compiling BlockchainSwift NodeClient.swift
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:15:33: error: 'NWConnection' is only available in macOS 10.14 or newer
    public init(stateHandler: ((NWConnection.State) -> Void)? = nil) {
                                ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:15:12: note: add @available attribute to enclosing initializer
    public init(stateHandler: ((NWConnection.State) -> Void)? = nil) {
           ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:12:14: note: add @available attribute to enclosing class
public class NodeClient {
             ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:19:53: error: 'NWConnection' is only available in macOS 10.14 or newer
    private func openConnection(to: NodeAddress) -> NWConnection {
                                                    ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:19:18: note: add @available attribute to enclosing instance method
    private func openConnection(to: NodeAddress) -> NWConnection {
                 ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:12:14: note: add @available attribute to enclosing class
public class NodeClient {
             ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:20:24: 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/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:20:24: 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/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:19:18: note: add @available attribute to enclosing instance method
    private func openConnection(to: NodeAddress) -> NWConnection {
                 ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:12:14: note: add @available attribute to enclosing class
public class NodeClient {
             ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:20:50: 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/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:20:50: 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/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:19:18: note: add @available attribute to enclosing instance method
    private func openConnection(to: NodeAddress) -> NWConnection {
                 ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:12:14: note: add @available attribute to enclosing class
public class NodeClient {
             ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:20:82: 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/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:20:82: 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/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:19:18: note: add @available attribute to enclosing instance method
    private func openConnection(to: NodeAddress) -> NWConnection {
                 ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:12:14: note: add @available attribute to enclosing class
public class NodeClient {
             ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:21:26: error: 'NWConnection' is only available in macOS 10.14 or newer
        let connection = NWConnection(to: endpoint, using: .udp)
                         ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:21:26: note: add 'if #available' version check
        let connection = NWConnection(to: endpoint, using: .udp)
                         ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:19:18: note: add @available attribute to enclosing instance method
    private func openConnection(to: NodeAddress) -> NWConnection {
                 ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeClient.swift:12:14: note: add @available attribute to enclosing class
public class NodeClient {
             ^
[8/8] Compiling BlockchainSwift Node.swift
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:22:31: error: 'NWConnection' is only available in macOS 10.14 or newer
    public var connections = [NWConnection]()
                              ^
/Users/builder/builds/UKfvDsi8u/3/finestructure/swiftpackageindex-builder/spi-builder-workspace/Sources/BlockchainSwift/Network/NodeServer.swift:19:14: note: add @available attribute to enclosing class
public class NodeServer {
             ^
[9/16] Compiling BlockchainSwift ECDSA.swift
[10/16] Compiling BlockchainSwift TransactionInput.swift
[11/16] Compiling BlockchainSwift Wallet.swift
[12/16] Compiling BlockchainSwift TransactionOutPoint.swift
[13/16] Compiling BlockchainSwift Blockchain.swift
[14/16] Compiling BlockchainSwift Block.swift
[15/16] Compiling BlockchainSwift TransationOutput.swift
[16/16] Compiling BlockchainSwift Transaction.swift
[17/18] Compiling BlockchainSwift ProofOfWork.swift
[18/18] Compiling BlockchainSwift Serialization.swift
/Users/builder/builds/UKfvDsi8u/3/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/3/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/3/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))
                                                           ^
error: fatalError
BUILD FAILURE 5.10 macosSpm