Charge a custom fee based on a users myCRED rank when making a transfer in myCRED.

mycred-pt-get-fee-filter-example2

/**
 * Custom transfer Fees
 * Charge a custom fee based on a users myCRED rank when making
 * a transfer in myCRED.
 * @version 1.0
 */
function mycred_pro_transfer_fee_by_rank( $fee, $amount, $user_id, $point_type, $prefs ) {

	// Make sure the rank add-on is enabled to prevent crashes
	if ( ! function_exists( 'mycred_get_rank_object_id' ) ) return $fee;

	$users_rank_id = mycred_get_rank_object_id( $user_id );

	// Make sure the user has a rank
	if ( $users_rank_id !== false ) {

		// If users has the rank with the ID of 12, impose 10% fee
		if ( $users_rank_id == 12 )
			$fee = $amount * 0.1;

		// Else if user has the rank with the ID of 13, impose 25% fee
		elseif ( $users_rank_id == 13 )
			$fee = $amount * 0.25;

	}

	return $fee;

}
add_filter( 'mycred_pt_get_fee', 'mycred_pro_transfer_fee_by_rank', 10, 5 );