woocommerce_update_options_payment_gateways_(gateway_id) action-hook . WC 1.0
There is a section - this may be a gateway or custom section.
Usage
add_action( 'woocommerce_update_options_payment_gateways_(gateway_id)', 'action_function_name_3428' ); function action_function_name_3428(){ // action... }
Where the hook is called
woocommerce_update_options_payment_gateways_(gateway_id)
woocommerce/includes/admin/settings/class-wc-settings-payment-gateways.php 227
do_action( 'woocommerce_update_options_payment_gateways_' . $gateway->id );
Where in WP core the hook is used WooCommerce
woocommerce/includes/gateways/bacs/class-wc-gateway-bacs.php 67
add_action( 'woocommerce_update_options_payment_gateways_' . $this->id, array( $this, 'process_admin_options' ) );
woocommerce/includes/gateways/bacs/class-wc-gateway-bacs.php 68
add_action( 'woocommerce_update_options_payment_gateways_' . $this->id, array( $this, 'save_account_details' ) );
woocommerce/includes/gateways/cheque/class-wc-gateway-cheque.php 44
add_action( 'woocommerce_update_options_payment_gateways_' . $this->id, array( $this, 'process_admin_options' ) );
woocommerce/includes/gateways/cod/class-wc-gateway-cod.php 44
add_action( 'woocommerce_update_options_payment_gateways_' . $this->id, array( $this, 'process_admin_options' ) );
woocommerce/includes/gateways/paypal/class-wc-gateway-paypal.php 73
add_action( 'woocommerce_update_options_payment_gateways_' . $this->id, array( $this, 'process_admin_options' ) );