Initial commit: Bluetooth mesh chat app with end-to-end encryption

2026-07-25 22:05:21 +00:00 · 2025-07-02 19:18:35 +02:00
commit 7e90bf6369
41 changed files with 2000 additions and 0 deletions
@@ -0,0 +1,66 @@
+import Foundation
+import CryptoKit
+
+enum MessageType: UInt8 {
+    case handshake = 0x01
+    case message = 0x02
+    case ack = 0x03
+    case relay = 0x04
+    case announce = 0x05
+    case keyExchange = 0x06
+}
+
+struct BitchatPacket: Codable {
+    let version: UInt8
+    let type: UInt8
+    let senderID: Data
+    let recipientID: Data?
+    let timestamp: UInt64
+    let payload: Data
+    let signature: Data?
+    var ttl: UInt8
+    
+    init(type: UInt8, senderID: Data, recipientID: Data?, timestamp: UInt64, payload: Data, signature: Data?, ttl: UInt8) {
+        self.version = 1
+        self.type = type
+        self.senderID = senderID
+        self.recipientID = recipientID
+        self.timestamp = timestamp
+        self.payload = payload
+        self.signature = signature
+        self.ttl = ttl
+    }
+    
+    var data: Data? {
+        try? JSONEncoder().encode(self)
+    }
+    
+    static func from(_ data: Data) -> BitchatPacket? {
+        try? JSONDecoder().decode(BitchatPacket.self, from: data)
+    }
+}
+
+struct BitchatMessage: Codable {
+    let id: String
+    let sender: String
+    let content: String
+    let timestamp: Date
+    let isRelay: Bool
+    let originalSender: String?
+    
+    init(sender: String, content: String, timestamp: Date, isRelay: Bool, originalSender: String? = nil) {
+        self.id = UUID().uuidString
+        self.sender = sender
+        self.content = content
+        self.timestamp = timestamp
+        self.isRelay = isRelay
+        self.originalSender = originalSender
+    }
+}
+
+protocol BitchatDelegate: AnyObject {
+    func didReceiveMessage(_ message: BitchatMessage)
+    func didConnectToPeer(_ peerID: String)
+    func didDisconnectFromPeer(_ peerID: String)
+    func didUpdatePeerList(_ peers: [String])
+}