feat(exchange): implement exchange rate history tracking

Introduce a mechanism to track and audit changes in exchange rates. This includes: - Creating `ExchangeRateHistory` model and migration to store rate changes. - Implementing `ExchangeRateService` to encapsulate rate logic. - Updating `UpdateExchangeRates` command to record history when rates change. - Adding `ExchangeRateHistoryResource` to the Filament admin panel for monitoring.
2026-08-10 03:04:18 +03:30 · 2026-08-10 03:04:18 +03:30 · ed5bae9997
commit ed5bae9997
parent a0bc871c8d
9 changed files with 582 additions and 22 deletions
--- a/04_Laravel/app/Console/Commands/UpdateExchangeRates.php
+++ b/04_Laravel/app/Console/Commands/UpdateExchangeRates.php
@ -3,6 +3,7 @@
 namespace App\Console\Commands;

 use App\Models\SystemSetting;
+use App\Models\ExchangeRateHistory;
 use Illuminate\Console\Command;
 use Illuminate\Support\Facades\Http;

@ -10,7 +11,7 @@ class UpdateExchangeRates extends Command
 {
    protected $signature = 'ifnex:update-rates {--source=ecb : Data source for exchange rates (ecb or freecurrencyapi)}';

-    protected $description = 'Update exchange rates from external APIs';
+    protected $description = 'Update exchange rates from external APIs and record history';

    public function handle(): int
    {
@ -25,28 +26,54 @@ class UpdateExchangeRates extends Command
            };
        } catch (\Throwable $e) {
            $this->error("Failed to fetch rates: {$e->getMessage()}");
-
            return Command::FAILURE;
        }

        if ($rates) {
-            SystemSetting::where('key', 'aed_to_irr')->update(['value' => (string) $rates['aed_to_irr']]);
-            SystemSetting::where('key', 'usd_to_irr')->update(['value' => (string) $rates['usd_to_irr']]);
+            $this->updateRate('aed_to_irr', $rates['aed_to_irr'], 'api', null, $source);
+            $this->updateRate('usd_to_irr', $rates['usd_to_irr'], 'api', null, $source);

-            $this->info("Exchange rates updated successfully:");
-            $this->line("  AED/IRR: {$rates['aed_to_irr']}");
-            $this->line("  USD/IRR: {$rates['usd_to_irr']}");
+            $this->info("✅ Exchange rates updated successfully:");
+            $this->line("  AED/IRR: " . number_format($rates['aed_to_irr']));
+            $this->line("  USD/IRR: " . number_format($rates['usd_to_irr']));
        } else {
-            $this->warn("No rates were updated. Using fallback values.");
+            $this->warn("⚠️  No rates were updated. Using fallback values.");
            $this->setFallbackRates();
        }

        return Command::SUCCESS;
    }

+    private function updateRate(string $key, float $newRate, string $source, ?int $userId, ?string $apiSource = null): void
+    {
+        $setting = SystemSetting::where('key', $key)->first();
+        $oldRate = $setting ? (float) $setting->value : 0;
+
+        // Update در system_settings
+        SystemSetting::updateOrCreate(
+            ['key' => $key],
+            ['value' => (string) $newRate]
+        );
+
+        // ثبت در تاریخچه فقط اگر تغییر کرده باشد
+        if ($oldRate != $newRate && $oldRate > 0) {
+            $currencyFrom = str_starts_with($key, 'aed') ? 'AED' : 'USD';
+            
+            ExchangeRateHistory::recordChange(
+                from: $currencyFrom,
+                to: 'IRR',
+                oldRate: $oldRate,
+                newRate: $newRate,
+                source: $source,
+                userId: $userId,
+                apiSource: $apiSource
+            );
+        }
+    }
+
    private function fetchFromEcb(): ?array
    {
-        $response = Http::get('https://api.exchangerate-api.com/v4/latest/AED');
+        $response = Http::timeout(10)->get('https://api.exchangerate-api.com/v4/latest/AED');

        if ($response->failed()) {
            return null;
@ -56,14 +83,14 @@ class UpdateExchangeRates extends Command

        return [
            'aed_to_irr' => round($data['rates']['IRR'] ?? 455000, 2),
-            'usd_to_irr' => round($data['rates']['IRR'] ?? 425000, 2),
+            'usd_to_irr' => round(($data['rates']['IRR'] ?? 425000) / 1.07, 2), // USD از AED محاسبه می‌شود
        ];
    }

    private function fetchFromFreeCurrencyApi(): ?array
    {
-        $response = Http::get('https://free.currencyapi.com/api/v3/latest', [
-            'apikey' => config('ifnex.currency_api_key'),
+        $response = Http::timeout(10)->get('https://api.freecurrencyapi.com/v1/latest', [
+            'apikey' => config('ifnex.currency.api_key'),
            'base_currency' => 'AED',
        ]);

@ -78,21 +105,15 @@ class UpdateExchangeRates extends Command
        }

        return [
-            'aed_to_irr' => round(($data['data']['IRR']['value'] ?? 455000) * 100, 2),
-            'usd_to_irr' => round(($data['data']['IRR']['value'] ?? 425000) * 100, 2),
+            'aed_to_irr' => round(($data['data']['IRR'] ?? 455000), 2),
+            'usd_to_irr' => round(($data['data']['IRR'] ?? 425000) / 1.07, 2),
        ];
    }

    private function setFallbackRates(): void
    {
-        SystemSetting::updateOrCreate(
-            ['key' => 'aed_to_irr'],
-            ['value' => '455000', 'type' => 'number', 'description' => 'AED to IRR exchange rate']
-        );
-        SystemSetting::updateOrCreate(
-            ['key' => 'usd_to_irr'],
-            ['value' => '425000', 'type' => 'number', 'description' => 'USD to IRR exchange rate']
-        );
+        $this->updateRate('aed_to_irr', 455000, 'api', null, 'fallback');
+        $this->updateRate('usd_to_irr', 425000, 'api', null, 'fallback');
        $this->info("Fallback rates set: AED/IRR=455000, USD/IRR=425000");
    }
 }
--- a/04_Laravel/app/Filament/Resources/ExchangeRateHistoryResource.php
+++ b/04_Laravel/app/Filament/Resources/ExchangeRateHistoryResource.php
@ -0,0 +1,287 @@
+<?php
+
+namespace App\Filament\Resources;
+
+use App\Filament\Resources\ExchangeRateHistoryResource\Pages;
+use App\Models\ExchangeRateHistory;
+use App\Models\SystemSetting;
+use App\Services\ExchangeRateService;
+use Filament\Forms;
+use Filament\Forms\Form;
+use Filament\Resources\Resource;
+use Filament\Tables;
+use Filament\Tables\Table;
+use Filament\Tables\Actions\Action;
+use Filament\Notifications\Notification;
+use Illuminate\Support\Facades\Auth;
+
+class ExchangeRateHistoryResource extends Resource
+{
+    protected static ?string $model = ExchangeRateHistory::class;
+
+    protected static ?string $navigationIcon = 'heroicon-o-currency-dollar';
+    protected static ?string $navigationLabel = 'نرخ ارز';
+    protected static ?string $modelLabel = 'تغییر نرخ';
+    protected static ?string $pluralModelLabel = 'تاریخچه نرخ ارز';
+    protected static ?string $navigationGroup = 'مالی';
+    protected static ?int $navigationSort = 3;
+
+    public static function form(Form $form): Form
+    {
+        return $form
+            ->schema([
+                Forms\Components\Section::make('جزئیات تغییر نرخ')
+                    ->schema([
+                        Forms\Components\TextInput::make('currency_from')
+                            ->label('ارز مبدأ')
+                            ->disabled(),
+                        Forms\Components\TextInput::make('currency_to')
+                            ->label('ارز مقصد')
+                            ->disabled(),
+                        Forms\Components\TextInput::make('old_rate')
+                            ->label('نرخ قبلی')
+                            ->disabled()
+                            ->suffix('ریال'),
+                        Forms\Components\TextInput::make('new_rate')
+                            ->label('نرخ جدید')
+                            ->disabled()
+                            ->suffix('ریال'),
+                        Forms\Components\TextInput::make('change_percent')
+                            ->label('درصد تغییر')
+                            ->disabled()
+                            ->suffix('%'),
+                        Forms\Components\TextInput::make('change_source')
+                            ->label('منبع تغییر')
+                            ->disabled(),
+                        Forms\Components\Select::make('changed_by')
+                            ->label('توسط')
+                            ->relationship('changedBy', 'name')
+                            ->disabled(),
+                        Forms\Components\Textarea::make('notes')
+                            ->label('یادداشت')
+                            ->disabled()
+                            ->columnSpanFull(),
+                    ])->columns(2),
+            ]);
+    }
+
+    public static function table(Table $table): Table
+    {
+        return $table
+            ->columns([
+                Tables\Columns\TextColumn::make('id')
+                    ->label('شناسه')
+                    ->sortable()
+                    ->toggleable(isToggledHiddenByDefault: true),
+                
+                Tables\Columns\TextColumn::make('currency_pair')
+                    ->label('جفت ارز')
+                    ->state(fn ($record) => "{$record->currency_from} → {$record->currency_to}")
+                    ->badge()
+                    ->color('info'),
+                
+                Tables\Columns\TextColumn::make('old_rate')
+                    ->label('نرخ قبلی')
+                    ->numeric(0)
+                    ->suffix(' ریال')
+                    ->color('gray'),
+                
+                Tables\Columns\TextColumn::make('new_rate')
+                    ->label('نرخ جدید')
+                    ->numeric(0)
+                    ->suffix(' ریال')
+                    ->weight('bold')
+                    ->color('primary'),
+                
+                Tables\Columns\TextColumn::make('change_percent')
+                    ->label('تغییر')
+                    ->state(fn ($record) => $record->change_percent !== null 
+                        ? number_format($record->change_percent, 2) . '%' 
+                        : '—')
+                    ->badge()
+                    ->color(fn ($record) => match(true) {
+                        $record->change_percent > 0 => 'danger',   // افزایش قیمت = قرمز
+                        $record->change_percent < 0 => 'success', // کاهش قیمت = سبز
+                        default => 'gray',
+                    })
+                    ->icon(fn ($record) => match(true) {
+                        $record->change_percent > 0 => 'heroicon-m-arrow-trending-up',
+                        $record->change_percent < 0 => 'heroicon-m-arrow-trending-down',
+                        default => null,
+                    }),
+                
+                Tables\Columns\TextColumn::make('change_source')
+                    ->label('منبع')
+                    ->badge()
+                    ->formatStateUsing(fn ($state) => $state === 'api' ? 'API خودکار' : 'دستی')
+                    ->color(fn ($state) => $state === 'api' ? 'info' : 'warning')
+                    ->icon(fn ($state) => $state === 'api' 
+                        ? 'heroicon-m-cog-6-tooth' 
+                        : 'heroicon-m-pencil-square'),
+                
+                Tables\Columns\TextColumn::make('changedBy.name')
+                    ->label('توسط')
+                    ->state(fn ($record) => $record->changedBy?->name ?? ($record->change_source === 'api' ? 'سیستم' : '—'))
+                    ->icon('heroicon-m-user'),
+                
+                Tables\Columns\TextColumn::make('created_at')
+                    ->label('تاریخ تغییر')
+                    ->dateTime('Y/m/d H:i')
+                    ->sortable(),
+            ])
+            ->filters([
+                Tables\Filters\SelectFilter::make('change_source')
+                    ->label('منبع')
+                    ->options([
+                        'api' => 'API خودکار',
+                        'manual' => 'دستی',
+                    ]),
+                Tables\Filters\SelectFilter::make('currency_pair')
+                    ->label('جفت ارز')
+                    ->options([
+                        'AED_IRR' => 'AED → IRR',
+                        'USD_IRR' => 'USD → IRR',
+                    ])
+                    ->query(function ($query, array $data) {
+                        if (!$data['value']) return $query;
+                        [$from, $to] = explode('_', $data['value']);
+                        return $query->where('currency_from', $from)
+                                     ->where('currency_to', $to);
+                    }),
+                Tables\Filters\Filter::make('created_at')
+                    ->form([
+                        Forms\Components\DatePicker::make('from')->label('از تاریخ'),
+                        Forms\Components\DatePicker::make('until')->label('تا تاریخ'),
+                    ])
+                    ->query(function ($query, array $data) {
+                        return $query
+                            ->when($data['from'], fn ($q, $d) => $q->whereDate('created_at', '>=', $d))
+                            ->when($data['until'], fn ($q, $d) => $q->whereDate('created_at', '<=', $d));
+                    }),
+            ])
+            ->actions([
+                Tables\Actions\ViewAction::make()->label('جزئیات'),
+            ])
+            ->headerActions([
+                // 🎯 دکمه اصلی: تنظیم نرخ جدید به صورت دستی
+                Action::make('setNewRate')
+                    ->label('تنظیم نرخ جدید')
+                    ->icon('heroicon-o-pencil-square')
+                    ->color('warning')
+                    ->form([
+                        Forms\Components\Select::make('currency_pair')
+                            ->label('جفت ارز')
+                            ->required()
+                            ->options([
+                                'AED_IRR' => 'درهم به ریال (AED → IRR)',
+                                'USD_IRR' => 'دلار به ریال (USD → IRR)',
+                            ])
+                            ->default('AED_IRR'),
+                        
+                        Forms\Components\TextInput::make('new_rate')
+                            ->label('نرخ جدید (ریال)')
+                            ->required()
+                            ->numeric()
+                            ->minValue(1)
+                            ->prefix('ریال')
+                            ->helperText(fn (callable $get) => 
+                                'نرخ فعلی: ' . number_format(self::getCurrentRateForPair($get('currency_pair'))) . ' ریال'
+                            ),
+                        
+                        Forms\Components\Textarea::make('notes')
+                            ->label('یادداشت (اختیاری)')
+                            ->placeholder('دلیل تغییر نرخ...')
+                            ->maxLength(500),
+                    ])
+                    ->action(function (array $data) {
+                        [$from, $to] = explode('_', $data['currency_pair']);
+                        
+                        $service = app(ExchangeRateService::class);
+                        $service->setRate(
+                            from: $from,
+                            to: $to,
+                            newRate: (float) $data['new_rate'],
+                            userId: Auth::id(),
+                            notes: $data['notes'] ?? null
+                        );
+                        
+                        Notification::make()
+                            ->title('نرخ ارز با موفقیت به‌روز شد')
+                            ->body("نرخ {$from}/{$to} به " . number_format($data['new_rate']) . " ریال تغییر یافت")
+                            ->success()
+                            ->send();
+                    }),
+                
+                // 🔄 دکمه آپدیت از API
+                Action::make('refreshFromApi')
+                    ->label('آپدیت از API')
+                    ->icon('heroicon-o-arrow-path')
+                    ->color('info')
+                    ->requiresConfirmation()
+                    ->modalHeading('آپدیت نرخ از API')
+                    ->modalDescription('آیا مطمئن هستید که می‌خواهید نرخ ارز را از API به‌روزرسانی کنید؟')
+                    ->action(function () {
+                        try {
+                            \Artisan::call('ifnex:update-rates');
+                            
+                            Notification::make()
+                                ->title('نرخ ارز از API به‌روزرسانی شد')
+                                ->success()
+                                ->send();
+                        } catch (\Throwable $e) {
+                            Notification::make()
+                                ->title('خطا در به‌روزرسانی')
+                                ->body($e->getMessage())
+                                ->danger()
+                                ->send();
+                        }
+                    }),
+            ])
+            ->bulkActions([])
+            ->defaultSort('created_at', 'desc')
+            ->poll('60s'); // هر ۶۰ ثانیه خودکار refresh می‌شود
+    }
+
+    // متد کمکی برای نمایش نرخ فعلی در فرم
+    protected static function getCurrentRateForPair(?string $pair): float
+    {
+        if (!$pair) return 0;
+        [$from, $to] = explode('_', $pair);
+        return app(ExchangeRateService::class)->getCurrentRate($from, $to);
+    }
+
+    public static function getRelations(): array
+    {
+        return [];
+    }
+
+    public static function getPages(): array
+    {
+        return [
+            'index' => Pages\ListExchangeRateHistories::route('/'),
+            'view' => Pages\ViewExchangeRateHistory::route('/{record}'),
+        ];
+    }
+
+    // فقط admin و super_admin دسترسی دارند
+    public static function canViewAny(): bool
+    {
+        $user = Auth::user();
+        return $user && $user->hasAnyRole(['super_admin', 'admin']);
+    }
+
+    public static function canCreate(): bool
+    {
+        return false; // ایجاد دستی از فرم ممکن نیست، فقط از Action
+    }
+
+    public static function canEdit($record): bool
+    {
+        return false;
+    }
+
+    public static function canDelete($record): bool
+    {
+        return false;
+    }
+}
--- a/04_Laravel/app/Filament/Resources/ExchangeRateHistoryResource/Pages/CreateExchangeRateHistory.php
+++ b/04_Laravel/app/Filament/Resources/ExchangeRateHistoryResource/Pages/CreateExchangeRateHistory.php
@ -0,0 +1,12 @@
+<?php
+
+namespace App\Filament\Resources\ExchangeRateHistoryResource\Pages;
+
+use App\Filament\Resources\ExchangeRateHistoryResource;
+use Filament\Actions;
+use Filament\Resources\Pages\CreateRecord;
+
+class CreateExchangeRateHistory extends CreateRecord
+{
+    protected static string $resource = ExchangeRateHistoryResource::class;
+}
--- a/04_Laravel/app/Filament/Resources/ExchangeRateHistoryResource/Pages/EditExchangeRateHistory.php
+++ b/04_Laravel/app/Filament/Resources/ExchangeRateHistoryResource/Pages/EditExchangeRateHistory.php
@ -0,0 +1,19 @@
+<?php
+
+namespace App\Filament\Resources\ExchangeRateHistoryResource\Pages;
+
+use App\Filament\Resources\ExchangeRateHistoryResource;
+use Filament\Actions;
+use Filament\Resources\Pages\EditRecord;
+
+class EditExchangeRateHistory extends EditRecord
+{
+    protected static string $resource = ExchangeRateHistoryResource::class;
+
+    protected function getHeaderActions(): array
+    {
+        return [
+            Actions\DeleteAction::make(),
+        ];
+    }
+}
--- a/04_Laravel/app/Filament/Resources/ExchangeRateHistoryResource/Pages/ListExchangeRateHistories.php
+++ b/04_Laravel/app/Filament/Resources/ExchangeRateHistoryResource/Pages/ListExchangeRateHistories.php
@ -0,0 +1,16 @@
+<?php
+
+namespace App\Filament\Resources\ExchangeRateHistoryResource\Pages;
+
+use App\Filament\Resources\ExchangeRateHistoryResource;
+use Filament\Resources\Pages\ListRecords;
+
+class ListExchangeRateHistories extends ListRecords
+{
+    protected static string $resource = ExchangeRateHistoryResource::class;
+
+    protected function getHeaderActions(): array
+    {
+        return [];
+    }
+}
--- a/04_Laravel/app/Filament/Resources/ExchangeRateHistoryResource/Pages/ViewExchangeRateHistory.php
+++ b/04_Laravel/app/Filament/Resources/ExchangeRateHistoryResource/Pages/ViewExchangeRateHistory.php
@ -0,0 +1,11 @@
+<?php
+
+namespace App\Filament\Resources\ExchangeRateHistoryResource\Pages;
+
+use App\Filament\Resources\ExchangeRateHistoryResource;
+use Filament\Resources\Pages\ViewRecord;
+
+class ViewExchangeRateHistory extends ViewRecord
+{
+    protected static string $resource = ExchangeRateHistoryResource::class;
+}
--- a/04_Laravel/app/Models/ExchangeRateHistory.php
+++ b/04_Laravel/app/Models/ExchangeRateHistory.php
@ -0,0 +1,73 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+class ExchangeRateHistory extends Model
+{
+    protected $table = 'exchange_rate_history';
+
+    protected $fillable = [
+        'currency_from',
+        'currency_to',
+        'old_rate',
+        'new_rate',
+        'change_percent',
+        'change_source',
+        'changed_by',
+        'api_source',
+        'notes',
+    ];
+
+    protected $casts = [
+        'old_rate' => 'decimal:2',
+        'new_rate' => 'decimal:2',
+        'change_percent' => 'decimal:4',
+    ];
+
+    public function changedBy(): BelongsTo
+    {
+        return $this->belongsTo(User::class, 'changed_by');
+    }
+
+    // Helper برای محاسبه درصد تغییر
+    public static function calculateChangePercent($old, $new): ?float
+    {
+        if (!$old || $old == 0) return null;
+        return round((($new - $old) / $old) * 100, 4);
+    }
+
+    // Helper برای ثبت تغییر
+    public static function recordChange(
+        string $from,
+        string $to,
+        float $oldRate,
+        float $newRate,
+        string $source = 'manual',
+        ?int $userId = null,
+        ?string $apiSource = null,
+        ?string $notes = null
+    ): self {
+        return self::create([
+            'currency_from' => $from,
+            'currency_to' => $to,
+            'old_rate' => $oldRate,
+            'new_rate' => $newRate,
+            'change_percent' => self::calculateChangePercent($oldRate, $newRate),
+            'change_source' => $source,
+            'changed_by' => $userId,
+            'api_source' => $apiSource,
+            'notes' => $notes,
+        ]);
+    }
+
+    // Scope برای آخرین تغییر
+    public function scopeLatest($query, string $from = 'AED', string $to = 'IRR')
+    {
+        return $query->where('currency_from', $from)
+                     ->where('currency_to', $to)
+                     ->orderBy('created_at', 'desc');
+    }
+}
--- a/04_Laravel/app/Services/ExchangeRateService.php
+++ b/04_Laravel/app/Services/ExchangeRateService.php
@ -0,0 +1,88 @@
+<?php
+
+namespace App\Services;
+
+use App\Models\SystemSetting;
+use App\Models\ExchangeRateHistory;
+
+class ExchangeRateService
+{
+    /**
+     * دریافت نرخ فعلی
+     */
+    public function getCurrentRate(string $from = 'AED', string $to = 'IRR'): float
+    {
+        $key = strtolower("{$from}_to_{$to}");
+        $setting = SystemSetting::where('key', $key)->first();
+        
+        if (!$setting) {
+            return config('ifnex.financial_defaults.aed_to_irr', 455000);
+        }
+        
+        return (float) $setting->value;
+    }
+
+    /**
+     * تنظیم نرخ جدید (توسط کاربر)
+     */
+    public function setRate(
+        string $from,
+        string $to,
+        float $newRate,
+        ?int $userId = null,
+        ?string $notes = null
+    ): ExchangeRateHistory {
+        $key = strtolower("{$from}_to_{$to}");
+        $oldRate = $this->getCurrentRate($from, $to);
+
+        // Update system_settings
+        SystemSetting::updateOrCreate(
+            ['key' => $key],
+            [
+                'value' => (string) $newRate,
+                'type' => 'number',
+                'description' => "{$from} to {$to} exchange rate",
+            ]
+        );
+
+        // ثبت در تاریخچه
+        return ExchangeRateHistory::recordChange(
+            from: $from,
+            to: $to,
+            oldRate: $oldRate,
+            newRate: $newRate,
+            source: 'manual',
+            userId: $userId,
+            notes: $notes
+        );
+    }
+
+    /**
+     * دریافت آخرین تغییرات
+     */
+    public function getLatestChanges(int $limit = 10)
+    {
+        return ExchangeRateHistory::with('changedBy')
+            ->orderBy('created_at', 'desc')
+            ->limit($limit)
+            ->get();
+    }
+
+    /**
+     * دریافت اطلاعات آخرین نرخ برای Widget
+     */
+    public function getLatestRateInfo(string $from = 'AED', string $to = 'IRR'): array
+    {
+        $latest = ExchangeRateHistory::latest($from, $to)->with('changedBy')->first();
+        $currentRate = $this->getCurrentRate($from, $to);
+
+        return [
+            'current_rate' => $currentRate,
+            'last_change' => $latest,
+            'last_updated' => $latest?->created_at,
+            'changed_by' => $latest?->changedBy?->name,
+            'source' => $latest?->change_source,
+            'change_percent' => $latest?->change_percent,
+        ];
+    }
+}
--- a/04_Laravel/database/migrations/2026_08_09_231738_create_exchange_rate_history_table.php
+++ b/04_Laravel/database/migrations/2026_08_09_231738_create_exchange_rate_history_table.php
@ -0,0 +1,33 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::create('exchange_rate_history', function (Blueprint $table) {
+            $table->id();
+            $table->string('currency_from', 10)->default('AED');
+            $table->string('currency_to', 10)->default('IRR');
+            $table->decimal('old_rate', 15, 2)->nullable();
+            $table->decimal('new_rate', 15, 2);
+            $table->decimal('change_percent', 8, 4)->nullable();
+            $table->enum('change_source', ['api', 'manual'])->default('manual');
+            $table->foreignId('changed_by')->nullable()->constrained('users')->nullOnDelete();
+            $table->string('api_source')->nullable();
+            $table->text('notes')->nullable();
+            $table->timestamps();
+            
+            $table->index(['currency_from', 'currency_to', 'created_at']);
+            $table->index('changed_by');
+        });
+    }
+
+    public function down(): void
+    {
+        Schema::dropIfExists('exchange_rate_history');
+    }
+};