Merge pull request #662 from nickdnk/add_balance_transaction_constants

Added BalanceTransaction type constants

lib/BalanceTransaction.php

@@ -30,6 +30,40 @@ class BalanceTransaction extends ApiResource
     use ApiOperations\All;
     use ApiOperations\Retrieve;
 
+    /**
+     * Possible string representations of the type of balance transaction.
+     * @link https://stripe.com/docs/api/balance/balance_transaction#balance_transaction_object-type
+     */
+    const TYPE_ADJUSTMENT                    = 'adjustment';
+    const TYPE_ADVANCE                       = 'advance';
+    const TYPE_ADVANCE_FUNDING               = 'advance_funding';
+    const TYPE_APPLICATION_FEE               = 'application_fee';
+    const TYPE_APPLICATION_FEE_REFUND        = 'application_fee_refund';
+    const TYPE_CHARGE                        = 'charge';
+    const TYPE_CONNECT_COLLECTION_TRANSFER   = 'connect_collection_transfer';
+    const TYPE_ISSUING_AUTHORIZATION_HOLD    = 'issuing_authorization_hold';
+    const TYPE_ISSUING_AUTHORIZATION_RELEASE = 'issuing_authorization_release';
+    const TYPE_ISSUING_TRANSACTION           = 'issuing_transaction';
+    const TYPE_PAYMENT                       = 'payment';
+    const TYPE_PAYMENT_FAILURE_REFUND        = 'payment_failure_refund';
+    const TYPE_PAYMENT_REFUND                = 'payment_refund';
+    const TYPE_PAYOUT                        = 'payout';
+    const TYPE_PAYOUT_CANCEL                 = 'payout_cancel';
+    const TYPE_PAYOUT_FAILURE                = 'payout_failure';
+    const TYPE_REFUND                        = 'refund';
+    const TYPE_REFUND_FAILURE                = 'refund_failure';
+    const TYPE_RESERVE_TRANSACTION           = 'reserve_transaction';
+    const TYPE_RESERVED_FUNDS                = 'reserved_funds';
+    const TYPE_STRIPE_FEE                    = 'stripe_fee';
+    const TYPE_STRIPE_FX_FEE                 = 'stripe_fx_fee';
+    const TYPE_TAX_FEE                       = 'tax_fee';
+    const TYPE_TOPUP                         = 'topup';
+    const TYPE_TOPUP_REVERSAL                = 'topup_reversal';
+    const TYPE_TRANSFER                      = 'transfer';
+    const TYPE_TRANSFER_CANCEL               = 'transfer_cancel';
+    const TYPE_TRANSFER_FAILURE              = 'transfer_failure';
+    const TYPE_TRANSFER_REFUND               = 'transfer_refund';
+
     /**
      * @return string The class URL for this resource. It needs to be special
      *    cased because it doesn't fit into the standard resource pattern.