Currencycloud API v2 PHP client

Version: 2.0.1

This is the official PHP SDK for the Currencycloud API. Additional documentation for each API endpoint can be found at developer.currencycloud.com.

If you have any queries or you require support, please contact our development team at development@currencycloud.com. Please quote your login id in any correspondence as this makes it simpler for us to locate your account and give you the support you need.

Prerequisites

Composer (optional, but highly recommended)

CurrencyCloud-PHP is a Composer project. While using Composer is not strictly required, it will be far easier to simply make use of Composer to do the dependency management and autoloading for you.

Supported PHP version

This library aims to support and is tested against PHP 7.1 and greater.

Installation

The recommended way to install Currencycloud SDK is through Composer.

If you do not have composer installed check Composer installation guide.

Assuming you have composer installed globally you can require Currencycloud SDK into you project by executing:

composer require currency-cloud/client

After installing, you need to require Composer's autoloader if you did not require it before:

require 'vendor/autoload.php';

Usage

You can register for demo API key at developer.currencycloud.com.

An example in PHP 7:

use CurrencyCloud\CurrencyCloud;
use CurrencyCloud\Session;

require_once __DIR__ . '/vendor/autoload.php';

$session = new Session(
    Session::ENVIRONMENT_DEMONSTRATION,
    '<user-id>',
    '<api-key>'
);

$client = CurrencyCloud::createDefault($session);

//Authenticate
$client->authenticate()
    ->login();

//Get available currencies
$currencies =
    $client->reference()
        ->availableCurrencies();

echo "Supported currencies:\n";

foreach ($currencies as $currency) {
    printf(
        "Currency: %s; Code: %s; Decimal places: %d\n",
        $currency->getName(),
        $currency->getCode(),
        $currency->getDecimalPlaces()
    );
}

echo "Balances:\n";

//Find balances
$balances =
    $client->balances()
        ->find();

foreach ($balances->getBalances() as $balance) {
    printf(
        "Balance ID: %s; Currency: %s; Amount: %s\n",
        $balance->getId(),
        $balance->getCurrency(),
        $balance->getAmount()
    );
}

//Close session
$client->authenticate()->close();

For a slightly longer example, see cook-book.php, which is an implementation of the Cookbook from the documentation.

Common Patterns

Reusing client for multiple requests

Authentication tokens are long-lived and are meant to be reused for multiple requests. This will improve performance of calls through the api.

On Behalf Of

If you want to make calls on behalf of another user (e.g. someone who is your end-client), you can execute certain commands 'on behalf of' the user's contact id. Here is an example:

$client->onBehalfOf('c6ece846-6df1-461d-acaa-b42a6aa74045', function (CurrencyCloud $client) {
    $balances =
        $client->balances()
            ->find();

    foreach ($balances->getBalances() as $balance) {
        printf(
            "Balance ID: %s; Currency: %s; Amount: %s\n",
            $balance->getId(),
            $balance->getCurrency(),
            $balance->getAmount()
        );
    }
});

Each of the above transactions will be executed in scope of the limits for that contact and linked to that contact. Note that the real user who executed the transaction will also be stored.

Errors

When an error occurs in the API, the library aims to give us much information as possible. A CurrencyCloudException will be thrown that contains much useful information that you can access via its methods. When the exception converted to string, it will provide information such as the following:

BadRequestException
---
platform: 'PHP 7.1.11-1+deb.sury.org~trusty+1'
request:
    parameters: {  }
    verb: get
    url: 'https://devapi.currencycloud.com/v2/rates/detailed?buy_currency=EUR&sell_currency=GBP&fixed_side=buy&amount=10000.00'
response:
    status_code: 400
    date: 'Tue, 13 Nov 2018 13:40:00 GMT'
    request_id: '2915002181730358306'
errors:
    -
        field: base
        code: rate_could_not_be_retrieved
        message: 'Rate could not be retrieved'
        params: {  }

This is split into 5 sections:

Error Type: In this case BadRequestException represents an HTTP 400 error
Platform: The PHP implementation that was used in the client
Request: Details about the HTTP request that was made, e.g. the POST parameters
Response: Details about the HTTP response that was returned, e.g. HTTP status code
Errors: A list of errors that provide additional information

The final section contains valuable information:

Field: The parameter that the error is linked to
Code: A code representing this error
Message: A human readable message that explains the error
Params: A map that contains dynamic parts of the error message for building custom error messages

When troubleshooting API calls with Currencycloud support, including the full error in any correspondence can be very helpful.

Development

Testing

Test cases can be run with vendor/bin/phpunit.

Dependencies

Contributing

We welcome pull requests from everyone! Please see CONTRIBUTING. Our sincere thanks for helping us create the best API for moving money anywhere around the world!

Versioning

This project uses semantic versioning. You can safely express a dependency on a major version and expect all minor and patch versions to be backwards compatible.

Deprecation Policy

Technology evolves quickly and we are always looking for better ways to serve our customers. From time to time we need to make room for innovation by removing sections of code that are no longer necessary. We understand this can be disruptive and consequently we have designed a Deprecation Policy that protects our customers' investment and that allows us to take advantage of modern tools, frameworks and practices in developing software.

Deprecation means that we discourage the use of a feature, design or practice because it has been superseded or is no longer considered efficient or safe but instead of removing it immediately, we mark it as @deprecated to provide backwards compatibility and time for you to update your projects. While the deprecated feature remains in the SDK for a period of time, we advise that you replace it with the recommended alternative which is explained in the relevant section of the code.

We remove deprecated features after three months from the time of announcement.

The security of our customers' assets is of paramount importance to us and sometimes we have to deprecate features because they may pose a security threat or because new, more secure, ways are available. On such occasions we reserve the right to set a different deprecation period which may range from immediate removal to the standard three months.

Once a feature has been marked as deprecated, we no longer develop the code or implement bug fixes. We only do security fixes.

List of features being deprecated

(No features are currently being deprecated)

Support

We actively support the latest version of the SDK. We support the immediate previous version on best-efforts basis. All other versions are no longer supported nor maintained.

codoffer/currencycloud-php