createSignature() public static method

creates a full array signature of a valid create request
public static createSignature ( ) : array
return array gateway create request format
 public function testCreateSignature()
 {
     $expected = ['billingAddressId', 'cardholderName', 'cvv', 'deviceData', 'expirationDate', 'expirationMonth', 'expirationYear', 'number', 'paymentMethodNonce', 'token', ['options' => ['failOnDuplicatePaymentMethod', 'makeDefault', 'verificationMerchantAccountId', 'verifyCard']], ['billingAddress' => Braintree\AddressGateway::createSignature()], 'customerId'];
     $this->assertEquals($expected, Braintree\PaymentMethodGateway::createSignature());
 }
 private static function baseSignature()
 {
     $billingAddressSignature = AddressGateway::createSignature();
     $optionsSignature = ['failOnDuplicatePaymentMethod', 'makeDefault', 'verificationMerchantAccountId', 'verifyCard'];
     return ['billingAddressId', 'cardholderName', 'cvv', 'deviceData', 'expirationDate', 'expirationMonth', 'expirationYear', 'number', 'paymentMethodNonce', 'token', ['options' => $optionsSignature], ['billingAddress' => $billingAddressSignature]];
 }