Laravel Currency

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A Laravel package for currency conversion and exchange rate management with multiple rate providers.

Features

• Currency conversion with buy / sell / average rates
• Multiple built-in rate providers (Monobank, PrivatBank, NBU, jsDelivr, ExchangeRatesAPI, CurrencyAPI, Fixer)
• Automatic caching of exchange rates with configurable TTL and fallback cache
• Dynamic base currency override with automatic rate recalculation
• Currency formatting with symbols, precision and locale separators
• Helper functions and Blade directives for use in views
• Custom provider support via a simple interface

Requirements

• PHP 8.1+
• Laravel 9.x, 10.x, 11.x, 12.x, or 13.x

Installation

composer require fomvasss/laravel-currency

Publish the configuration file:

php artisan vendor:publish --tag=currency-config

Configuration

The published config file is located at config/currency.php.

Available options

return [
    // Default base currency
    'default' => 'UAH',

    // Default rate provider alias (see 'providers' array)
    'default_provider' => env('CURRENCY_DEFAULT_PROVIDER', 'monobank'),

    // Available providers
    'providers' => [
        'nbu'              => \Fomvasss\Currency\RateProviders\NbuRateProvider::class,
        'monobank'         => \Fomvasss\Currency\RateProviders\MonobankRateProvider::class,
        'privatbank'       => \Fomvasss\Currency\RateProviders\PrivatbankRateProvider::class,
        'jsdelivr'         => \Fomvasss\Currency\RateProviders\JsDelivrProvider::class,
        'exchangeratesapi' => \Fomvasss\Currency\RateProviders\ExchangeRatesApiProvider::class,
        'currencyapi'      => \Fomvasss\Currency\RateProviders\CurrencyApiProvider::class,
        'fixer'            => \Fomvasss\Currency\RateProviders\FixerProvider::class,
    ],

    // Primary rate cache TTL in seconds (default: 1 hour)
    'cache_ttl' => env('CURRENCY_CACHE_TTL', 3600),

    // Fallback cache TTL in seconds — used when primary API is unavailable (default: 1 day)
    'cache_ttl_fallback' => env('CURRENCY_CACHE_TTL_FALLBACK', 86400),

    // Default rate type: 'buy', 'sell', or 'average'
    'default_rate_type' => env('CURRENCY_DEFAULT_RATE_TYPE', 'average'),

    // Default decimal precision (can be overridden per currency)
    'default_precision' => env('CURRENCY_DEFAULT_PRECISION', 2),

    // API keys for paid/key-required providers
    'exchange_rates_api_key' => env('EXCHANGE_RATES_API_KEY', null),
    'currencyapi_key'        => env('CURRENCYAPI_KEY', null),
    'fixer_api_key'          => env('FIXER_API_KEY', null),

    // Active currencies with formatting options
    'currencies' => [
        'USD' => [
            'code'              => 'USD',
            'title'             => 'US Dollar',
            'symbol'            => '$',
            'precision'         => 2,
            'thousandSeparator' => ',',
            'decimalSeparator'  => '.',
            'symbolPlacement'   => 'before',
        ],
        // ... other currencies
    ],
];

Environment Variables

Rate Providers

| Alias | Class | Currencies | API Key | Notes | |------------------|-----------------------------|----------------|---------|------------------------------| | nbu | NbuRateProvider | 30+ | No | National Bank of Ukraine | | monobank | MonobankRateProvider | Multiple | No | Monobank API | | privatbank | PrivatbankRateProvider | EUR, USD only | No | PrivatBank API limitation | | jsdelivr | JsDelivrProvider | 150+ | No | Free CDN, updated daily | | exchangeratesapi | ExchangeRatesApiProvider | Multiple | Yes | https://exchangeratesapi.io | | currencyapi | CurrencyApiProvider | Multiple | Yes | https://currencyapi.com (300 req/month free) | | fixer | FixerProvider | Multiple | Yes | https://fixer.io (100 req/month free) |

Basic Usage

use Fomvasss\Currency\Facades\Currency;

// Convert currencies
$euros = Currency::convert(100, 'USD', 'EUR');

// Get exchange rate
$usdRate = Currency::getRate('USD');           // average by default
$buyRate  = Currency::getRate('USD', 'buy');
$sellRate = Currency::getRate('USD', 'sell');

// Get all rates
$allRates = Currency::getRates();              // average
$allRates = Currency::getRates('all');         // ['USD' => ['buy' => ..., 'sell' => ...], ...]

// Format currency
$formatted = Currency::format(1234.56, 'USD'); // $ 1,234.56
$noSymbol  = Currency::format(1234.56, 'USD', false); // 1,234.56

Switching Rate Providers

// Switch by alias (recommended)
Currency::useProvider('nbu');
Currency::useProvider('monobank');
Currency::useProvider('jsdelivr');

// Switch via setRateProvider — accepts alias, class name, or instance
Currency::setRateProvider('nbu');
Currency::setRateProvider(\Fomvasss\Currency\RateProviders\NbuRateProvider::class);
Currency::setRateProvider(new NbuRateProvider());

$rate = Currency::getRate('USD');

Base Currency

// Get current base currency
$base = Currency::getBaseCurrency(); // 'UAH' (from config)

// Override base currency at runtime
// All rates returned by getRate() and getRates() are automatically recalculated
Currency::setBaseCurrency('USD');

$rates = Currency::getRates();
// Now returns rates relative to USD: ['EUR' => 0.92, 'UAH' => 41.5, ...]
// USD itself is NOT in the array (it is the base, rate = 1.0)

// Convert after changing base
$amount = Currency::convert(100, 'EUR', 'GBP');

Checking Provider Capabilities

$currencies = Currency::getSupportedCurrencies();      // ['USD', 'EUR', ...]
$count      = Currency::getSupportedCurrenciesCount(); // e.g. 150 for jsdelivr

if (Currency::isSupported('JPY')) {
    $rate = Currency::getRate('JPY');
}

Active Currencies (from config)

$currencies = Currency::getActiveCurrencies();     // full config array
$codes      = Currency::getActiveCurrencyCodes();  // ['UAH', 'USD', 'EUR', ...]
$allConfig  = Currency::getAllCurrencies();         // alias for getActiveCurrencies()

$usdConfig  = Currency::getCurrencyConfig('USD');  // ['symbol' => '$', 'precision' => 2, ...]
$precision  = Currency::getPrecision('USD');        // 2

Cache Management

// Clear cached rates for the current provider
Currency::clearCache();

Fallback cache stores the last successful rates and is used automatically when the primary API is unavailable. Configure its TTL via cache_ttl_fallback or the CURRENCY_CACHE_TTL_FALLBACK env variable.

Helper Functions

Global PHP helpers are available without importing any class:

// Convert amount
$result = currency_convert(100, 'USD', 'EUR');
$result = currency_convert(100, 'USD', 'EUR', 'sell');

// Format with symbol
$output = currency_format(1234.56, 'USD');          // $ 1,234.56
$output = currency_format(1234.56, 'USD', false);   // 1,234.56

// Get rate
$rate = currency_rate('USD');           // average
$rate = currency_rate('USD', 'buy');

// Get symbol
$symbol = currency_symbol('USD'); // '$'

Blade Directives

{{-- Convert and output --}}
@currency(100, 'USD', 'EUR')

{{-- Format with symbol --}}
@currencyFormat(1234.56, 'USD')

{{-- Output exchange rate --}}
@currencyRate('USD')

{{-- Output symbol --}}
@currencySymbol('USD')

Event Handling

The package dispatches a CurrencyRateFetchFailed event when an API call fails.

// app/Listeners/HandleCurrencyRateFailure.php
namespace App\Listeners;

use Fomvasss\Currency\Events\CurrencyRateFetchFailed;
use Illuminate\Support\Facades\Log;

class HandleCurrencyRateFailure
{
    public function handle(CurrencyRateFetchFailed $event): void
    {
        Log::error('Currency API failed', [
            'provider'      => $event->providerClass,
            'error'         => $event->errorMessage,
            'using_fallback' => $event->usingFallback,
        ]);
    }
}

Register in EventServiceProvider:

use Fomvasss\Currency\Events\CurrencyRateFetchFailed;
use App\Listeners\HandleCurrencyRateFailure;

protected $listen = [
    CurrencyRateFetchFailed::class => [
        HandleCurrencyRateFailure::class,
    ],
];

Event properties:

| Property | Type | Description | |------------------|---------|-----------------------------------------| | $providerClass | string | Class name of the failed provider | | $errorMessage | string | Error description | | $usingFallback | bool | Whether fallback cache is being used | | $fallbackRates | array | Fallback rates (if available) |

Fallback Strategy

Use jsdelivr as a free fallback when primary APIs are unavailable:

try {
    Currency::useProvider('monobank');
    $rate = Currency::getRate('USD');
} catch (\Exception $e) {
    Currency::useProvider('jsdelivr'); // free, 150+ currencies, no rate limits
    $rate = Currency::getRate('USD');
}

Custom Providers

You can implement your own rate provider by creating a class that extends AbstractRateProvider or implements the RateProvider contract directly.

See the full guide with examples (API keys, multi-source fallback, mock for tests): CUSTOM_PROVIDERS.md.

License

MIT License. See LICENSE for details.