✨ Enhance blockchain

SwiftChainCore/Models/Wallet.swift

@@ -0,0 +1,47 @@
+//
+//  Wallet.swift
+//  SwiftChain
+//
+//  Created by Victor on 27/11/2024.
+//
+
+import CryptoKit
+import Foundation
+
+public class Wallet {
+    private let privateKey: Curve25519.Signing.PrivateKey
+    let publicKey: Curve25519.Signing.PublicKey
+    public let address: String
+
+    public init() {
+        // Générer une nouvelle paire de clés
+        privateKey = Curve25519.Signing.PrivateKey()
+        publicKey = privateKey.publicKey
+
+        // Créer une adresse au format swift_(hash)
+        let pubKeyData = publicKey.rawRepresentation
+        let hash = SHA256.hash(data: pubKeyData)
+        let hashString = hash.compactMap { String(format: "%02x", $0) }.joined()
+        address = "swift_" + hashString.prefix(40)
+    }
+
+    // Signer une transaction
+    public func signTransaction(_ transaction: Transaction) -> Data? {
+        let messageData = transaction.messageToSign()
+        return try? privateKey.signature(for: messageData)
+    }
+
+    // Vérifier une signature
+    static func verifySignature(for transaction: Transaction, signature: Data, publicKeyData: Data) -> Bool {
+        guard let publicKey = try? Curve25519.Signing.PublicKey(rawRepresentation: publicKeyData) else {
+            return false
+        }
+
+        return publicKey.isValidSignature(signature, for: transaction.messageToSign())
+    }
+
+    // Obtenir la clé publique en format Data
+    public func getPublicKeyData() -> Data {
+        return publicKey.rawRepresentation
+    }
+}