Update to latest swift-homomorphic-encryption and adopt swift 6

.github/workflows/ci.yaml

@@ -36,7 +36,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        swift: [ "5.10", "6.0" ]
+        swift: [ "6.0" ]
     name: swift ${{ matrix.swift }} tests
     steps:
     - uses: slashmo/[email protected]

Package.swift

@@ -1,4 +1,4 @@
-// swift-tools-version: 5.10
+// swift-tools-version: 6.0
 // The swift-tools-version declares the minimum version of Swift required to build this package.
 
 // Copyright 2024 Apple Inc. and the Swift Homomorphic Encryption project authors
@@ -33,7 +33,9 @@ let package = Package(
         .package(url: "https://github.com/apple/swift-argument-parser.git", from: "1.2.0"),
         .package(url: "https://github.com/apple/swift-asn1.git", from: "1.0.0"),
         .package(url: "https://github.com/apple/swift-crypto.git", from: "3.5.0"),
-        .package(url: "https://github.com/apple/swift-homomorphic-encryption", from: "1.0.0"),
+        .package(
+            url: "https://github.com/apple/swift-homomorphic-encryption",
+            revision: "7091583923d9e25ec760e8479b56f6aefd7fa6d5"),
         .package(url: "https://github.com/apple/swift-protobuf.git", from: "1.27.0"),
         .package(url: "https://github.com/hummingbird-project/hummingbird", from: "2.0.0"),
         .package(url: "https://github.com/hummingbird-project/hummingbird-compression", from: "2.0.0-rc.2"),
@@ -91,6 +93,6 @@ let package = Package(
 #if canImport(Darwin)
 // Set the minimum macOS version for the package
 package.platforms = [
-    .macOS(.v14), // Constrained by Swift 5.10 support for Xcode (https://developer.apple.com/support/xcode/)
+    .macOS(.v15), // Constrained by swift-homomorphic-encryption
 ]
 #endif

README.md

@@ -27,7 +27,7 @@ The documentation lives at [Swift Package Index](https://swiftpackageindex.com/a
 Building Live Caller ID Lookup Example requires:
 * 64-bit processor with little-endian memory representation
 * macOS or Linux operating system
-* [Swift](https://www.swift.org/) version 5.10 or later
+* [Swift](https://www.swift.org/) version 6.0 or later
 
 Additionally, developing Live Caller ID Lookup Example requires:
 * [Nick Lockwood SwiftFormat](https://github.com/nicklockwood/SwiftFormat)

Sources/PIRService/Controllers/PrivacyPassController.swift

@@ -12,12 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#if canImport(Darwin)
 import Foundation
-#else
-// Foundation.URL is not Sendable
-@preconcurrency import Foundation
-#endif
 import Hummingbird
 import PrivacyPass
 
@@ -50,11 +45,7 @@ struct PrivacyPassController<UserAuthenticator: UserTokenAuthenticator> {
         }
         // swiftlint:disable:next force_unwrapping
         let issuerRequestUri = URL(string: "/issue")!
-        #if canImport(Darwin)
         return TokenIssuerDirectory(issuerRequestUri: issuerRequestUri, tokenKeys: tokenKeys)
-        #else
-        return await TokenIssuerDirectory(issuerRequestUri: issuerRequestUri, tokenKeys: tokenKeys)
-        #endif
     }
 
     @Sendable

Sources/PrivacyPass/TokenIssuerDirectory.swift

@@ -12,12 +12,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-#if canImport(Darwin)
 import Foundation
-#else
-// Foundation.URL is not Sendable
-@preconcurrency import Foundation
-#endif
 
 /// Token issuer directory hold the list of all public keys supported by the issuer.
 ///