ST_ST_GET_PROD_REQ => ST_CHECK_CREDIT: ;
ST_RESET => ST_CHECK_CREDIT: ;
ST_CHECK_CREDIT => ST_PROVIDE_PRODUCT:  (r_price_product_counter>=r_price_product) ;
ST_CHECK_CREDIT => ST_PROVIDE_TOTAL_REFUND: (i_refund_request='1') ;
ST_CHECK_CREDIT => ST_CHECK_CREDIT: ;
ST_PROVIDE_PRODUCT => ST_PROVIDE_REFUND: ;
ST_PROVIDE_REFUND => ST_RESET: ;
ST_PROVIDE_TOTAL_REFUND => ST_RESET: ;