Optimistic Sending Bindings

LibXMTP.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name             = 'LibXMTP'
-  s.version          = '0.5.4-beta2'
+  s.version          = '0.5.4-beta3'
   s.summary          = 'XMTP shared Rust code that powers cross-platform SDKs'
 
   s.homepage         = 'https://github.com/xmtp/libxmtp-swift'
@@ -10,7 +10,7 @@ Pod::Spec.new do |s|
   s.platform         = :ios, '14.0', :macos, '11.0'
   s.swift_version    = '5.3'
 
-  s.source       = { :http => "https://github.com/xmtp/libxmtp/releases/download/swift-bindings-5c78fba/LibXMTPSwiftFFI.zip", :type => :zip }
+  s.source       = { :http => "https://github.com/xmtp/libxmtp/releases/download/swift-bindings-d4d8134/LibXMTPSwiftFFI.zip", :type => :zip }
   s.vendored_frameworks = 'LibXMTPSwiftFFI.xcframework'
   s.source_files = 'Sources/LibXMTP/**/*'
 end

Package.swift

@@ -27,8 +27,8 @@ let package = Package(
         ),
         .binaryTarget(
             name: "LibXMTPSwiftFFI",
-            url: "https://github.com/xmtp/libxmtp/releases/download/swift-bindings-5c78fba/LibXMTPSwiftFFI.zip",
-            checksum: "eb967303095d389701f957c5fd9f2e72eafddd5ae71bdd249a6dab26dfc30fb9"
+            url: "https://github.com/xmtp/libxmtp/releases/download/swift-bindings-d4d8134/LibXMTPSwiftFFI.zip",
+            checksum: "26b52514c78edc030c73d7a9b21d7b55c2d42342dce4c7fb5480f530ab3cca30"
         ),
         .testTarget(name: "LibXMTPTests", dependencies: ["LibXMTP"]),
     ]

Sources/LibXMTP/libxmtp-version.txt

@@ -1,3 +1,3 @@
-Version: 5c78fbad
+Version: d4d8134a
 Branch: main
-Date: 2024-07-03 01:23:38 +0000
+Date: 2024-07-08 15:44:32 +0000

Sources/LibXMTP/xmtpv3.swift

@@ -751,6 +751,11 @@ public protocol FfiGroupProtocol: AnyObject {
 
     func send(contentBytes: Data) async throws -> Data
 
+    /**
+     * send a message without immediately publishing to the delivery service.
+     */
+    func sendOptimistic(contentBytes: Data) throws -> FfiUnpublishedMessage
+
     func stream(messageCallback: FfiMessageCallback) async throws -> FfiStreamCloser
 
     func superAdminList() throws -> [String]
@@ -1071,6 +1076,16 @@ open class FfiGroup:
             )
     }
 
+    /**
+     * send a message without immediately publishing to the delivery service.
+     */
+    open func sendOptimistic(contentBytes: Data) throws -> FfiUnpublishedMessage {
+        return try FfiConverterTypeFfiUnpublishedMessage.lift(rustCallWithError(FfiConverterTypeGenericError.lift) {
+            uniffi_xmtpv3_fn_method_ffigroup_send_optimistic(self.uniffiClonePointer(),
+                                                             FfiConverterData.lower(contentBytes), $0)
+        })
+    }
+
     open func stream(messageCallback: FfiMessageCallback) async throws -> FfiStreamCloser {
         return
             try await uniffiRustCallAsync(
@@ -1703,6 +1718,113 @@ public func FfiConverterTypeFfiStreamCloser_lower(_ value: FfiStreamCloser) -> U
     return FfiConverterTypeFfiStreamCloser.lower(value)
 }
 
+public protocol FfiUnpublishedMessageProtocol: AnyObject {
+    func id() -> Data
+
+    func publish() async throws
+}
+
+open class FfiUnpublishedMessage:
+    FfiUnpublishedMessageProtocol
+{
+    fileprivate let pointer: UnsafeMutableRawPointer!
+
+    /// Used to instantiate a [FFIObject] without an actual pointer, for fakes in tests, mostly.
+    public struct NoPointer {
+        public init() {}
+    }
+
+    // TODO: We'd like this to be `private` but for Swifty reasons,
+    // we can't implement `FfiConverter` without making this `required` and we can't
+    // make it `required` without making it `public`.
+    public required init(unsafeFromRawPointer pointer: UnsafeMutableRawPointer) {
+        self.pointer = pointer
+    }
+
+    /// This constructor can be used to instantiate a fake object.
+    /// - Parameter noPointer: Placeholder value so we can have a constructor separate from the default empty one that may be implemented for classes extending [FFIObject].
+    ///
+    /// - Warning:
+    ///     Any object instantiated with this constructor cannot be passed to an actual Rust-backed object. Since there isn't a backing [Pointer] the FFI lower functions will crash.
+    public init(noPointer _: NoPointer) {
+        pointer = nil
+    }
+
+    public func uniffiClonePointer() -> UnsafeMutableRawPointer {
+        return try! rustCall { uniffi_xmtpv3_fn_clone_ffiunpublishedmessage(self.pointer, $0) }
+    }
+
+    // No primary constructor declared for this class.
+
+    deinit {
+        guard let pointer = pointer else {
+            return
+        }
+
+        try! rustCall { uniffi_xmtpv3_fn_free_ffiunpublishedmessage(pointer, $0) }
+    }
+
+    open func id() -> Data {
+        return try! FfiConverterData.lift(try! rustCall {
+            uniffi_xmtpv3_fn_method_ffiunpublishedmessage_id(self.uniffiClonePointer(), $0)
+        })
+    }
+
+    open func publish() async throws {
+        return
+            try await uniffiRustCallAsync(
+                rustFutureFunc: {
+                    uniffi_xmtpv3_fn_method_ffiunpublishedmessage_publish(
+                        self.uniffiClonePointer()
+                    )
+                },
+                pollFunc: ffi_xmtpv3_rust_future_poll_void,
+                completeFunc: ffi_xmtpv3_rust_future_complete_void,
+                freeFunc: ffi_xmtpv3_rust_future_free_void,
+                liftFunc: { $0 },
+                errorHandler: FfiConverterTypeGenericError.lift
+            )
+    }
+}
+
+public struct FfiConverterTypeFfiUnpublishedMessage: FfiConverter {
+    typealias FfiType = UnsafeMutableRawPointer
+    typealias SwiftType = FfiUnpublishedMessage
+
+    public static func lift(_ pointer: UnsafeMutableRawPointer) throws -> FfiUnpublishedMessage {
+        return FfiUnpublishedMessage(unsafeFromRawPointer: pointer)
+    }
+
+    public static func lower(_ value: FfiUnpublishedMessage) -> UnsafeMutableRawPointer {
+        return value.uniffiClonePointer()
+    }
+
+    public static func read(from buf: inout (data: Data, offset: Data.Index)) throws -> FfiUnpublishedMessage {
+        let v: UInt64 = try readInt(&buf)
+        // The Rust code won't compile if a pointer won't fit in a UInt64.
+        // We have to go via `UInt` because that's the thing that's the size of a pointer.
+        let ptr = UnsafeMutableRawPointer(bitPattern: UInt(truncatingIfNeeded: v))
+        if ptr == nil {
+            throw UniffiInternalError.unexpectedNullPointer
+        }
+        return try lift(ptr!)
+    }
+
+    public static func write(_ value: FfiUnpublishedMessage, into buf: inout [UInt8]) {
+        // This fiddling is because `Int` is the thing that's the same size as a pointer.
+        // The Rust code won't compile if a pointer won't fit in a `UInt64`.
+        writeInt(&buf, UInt64(bitPattern: Int64(Int(bitPattern: lower(value)))))
+    }
+}
+
+public func FfiConverterTypeFfiUnpublishedMessage_lift(_ pointer: UnsafeMutableRawPointer) throws -> FfiUnpublishedMessage {
+    return try FfiConverterTypeFfiUnpublishedMessage.lift(pointer)
+}
+
+public func FfiConverterTypeFfiUnpublishedMessage_lower(_ value: FfiUnpublishedMessage) -> UnsafeMutableRawPointer {
+    return FfiConverterTypeFfiUnpublishedMessage.lower(value)
+}
+
 public protocol FfiV2ApiClientProtocol: AnyObject {
     func batchQuery(req: FfiV2BatchQueryRequest) async throws -> FfiV2BatchQueryResponse
 
@@ -4913,6 +5035,9 @@ private var initializationResult: InitializationResult {
     if uniffi_xmtpv3_checksum_method_ffigroup_send() != 37701 {
         return InitializationResult.apiChecksumMismatch
     }
+    if uniffi_xmtpv3_checksum_method_ffigroup_send_optimistic() != 22919 {
+        return InitializationResult.apiChecksumMismatch
+    }
     if uniffi_xmtpv3_checksum_method_ffigroup_stream() != 45558 {
         return InitializationResult.apiChecksumMismatch
     }
@@ -4970,6 +5095,12 @@ private var initializationResult: InitializationResult {
     if uniffi_xmtpv3_checksum_method_ffistreamcloser_is_closed() != 62423 {
         return InitializationResult.apiChecksumMismatch
     }
+    if uniffi_xmtpv3_checksum_method_ffiunpublishedmessage_id() != 4148 {
+        return InitializationResult.apiChecksumMismatch
+    }
+    if uniffi_xmtpv3_checksum_method_ffiunpublishedmessage_publish() != 47708 {
+        return InitializationResult.apiChecksumMismatch
+    }
     if uniffi_xmtpv3_checksum_method_ffiv2apiclient_batch_query() != 26551 {
         return InitializationResult.apiChecksumMismatch
     }