Decrypted Group Messages (#245)

* add decrypted messages for react native

* bump the pod spec

Sources/XMTPiOS/Extensions/Ffi.swift

@@ -207,6 +207,18 @@ extension FfiMessage {
 			sent: Date(timeIntervalSince1970: TimeInterval(sentAtNs / 1_000_000_000))
 		)
 	}
+
+	func fromFFIDecrypted(client: Client) throws -> DecryptedMessage {
+		let encodedContent = try EncodedContent(serializedData: content)
+
+		return DecryptedMessage(
+			id: id.toHex,
+			encodedContent: encodedContent,
+			senderAddress: addrFrom,
+			sentAt: Date(timeIntervalSince1970: TimeInterval(sentAtNs / 1_000_000_000)),
+			topic: convoId.toHex
+		)
+	}
 }
 
 // MARK: Group

Sources/XMTPiOS/Group.swift

@@ -151,4 +151,26 @@ public struct Group: Identifiable, Equatable, Hashable {
 			try ffiMessage.fromFFI(client: client)
 		}
 	}
+
+	public func decryptedMessages(before: Date? = nil, after: Date? = nil, limit: Int? = nil) async throws -> [DecryptedMessage] {
+		var options = FfiListMessagesOptions(sentBeforeNs: nil, sentAfterNs: nil, limit: nil)
+
+		if let before {
+			options.sentBeforeNs = Int64(before.millisecondsSinceEpoch)
+		}
+
+		if let after {
+			options.sentAfterNs = Int64(after.millisecondsSinceEpoch)
+		}
+
+		if let limit {
+			options.limit = Int64(limit)
+		}
+
+		let messages = try ffiGroup.findMessages(opts: options)
+
+		return try messages.map { ffiMessage in
+			try ffiMessage.fromFFIDecrypted(client: client)
+		}
+	}
 }

XMTP.podspec

@@ -16,7 +16,7 @@ Pod::Spec.new do |spec|
   #
 
   spec.name         = "XMTP"
-  spec.version      = "0.8.2"
+  spec.version      = "0.8.3"
   spec.summary      = "XMTP SDK Cocoapod"
 
   # This description is used to generate tags and improve search results.