woocommerce_api_wc_gateway_paypal action-hookWC 1.0

Usage

add_action( 'woocommerce_api_wc_gateway_paypal', 'wp_kama_woocommerce_api_wc_gateway_paypal_action' );

/**
 * Function for `woocommerce_api_wc_gateway_paypal` action-hook.
 * 
 * @return void
 */
function wp_kama_woocommerce_api_wc_gateway_paypal_action(){

	// action...
}

Where the hook is called

woocommerce_legacy_paypal_ipn()
woocommerce_api_wc_gateway_paypal
woocommerce/includes/wc-deprecated-functions.php 228
do_action( 'woocommerce_api_wc_gateway_paypal' );

Where the hook is used in WooCommerce

woocommerce/includes/gateways/paypal/includes/class-wc-gateway-paypal-ipn-handler.php 34
add_action( 'woocommerce_api_wc_gateway_paypal', array( $this, 'check_response' ) );