Initial commit - WASL Digital Wallet

Backend/app/Services/JwtService.php

@@ -0,0 +1,56 @@
+<?php
+
+namespace App\Services;
+
+use Firebase\JWT\JWT;
+use Firebase\JWT\Key;
+use App\Models\User;
+use Illuminate\Support\Str;
+
+class JwtService
+{
+    protected string $secret;
+    protected string $algo;
+    protected int $ttl;
+
+    public function __construct()
+    {
+        $this->secret = config('jwt.secret') ?? config('app.key') ?? 'default-secret-key-wasl';
+        $this->algo = config('jwt.algo', 'HS256');
+        $this->ttl = config('jwt.ttl', 15); // in minutes
+    }
+
+    /**
+     * Generate access token for a user.
+     */
+    public function generateToken(User $user, ?string $deviceId = null): string
+    {
+        $now = time();
+        $payload = [
+            'iss' => config('app.url'),
+            'iat' => $now,
+            'nbf' => $now,
+            'exp' => $now + ($this->ttl * 60),
+            'sub' => $user->uuid,
+            'jti' => Str::random(16),
+            'dev' => $deviceId,
+            'kyc' => $user->kyc_level,
+        ];
+
+        return JWT::encode($payload, $this->secret, $this->algo);
+    }
+
+    /**
+     * Validate and decode token.
+     */
+    public function validateToken(string $token): ?array
+    {
+        try {
+            $decoded = JWT::decode($token, new Key($this->secret, $this->algo));
+            return (array) $decoded;
+        } catch (\Throwable $e) {
+            report($e);
+            return null;
+        }
+    }
+}