GetRequestType.groovy

package examples

import com.atlassian.jira.component.ComponentAccessor
import com.atlassian.servicedesk.api.requesttype.RequestTypeService
import com.onresolve.scriptrunner.runner.customisers.PluginModule
import com.onresolve.scriptrunner.runner.customisers.WithPlugin

@WithPlugin("com.atlassian.servicedesk")

@PluginModule
RequestTypeService requestTypeService

def issue = event.issue
def currentUser = ComponentAccessor.jiraAuthenticationContext.loggedInUser
def customFieldManager = ComponentAccessor.customFieldManager

def requestTypeCustomField = customFieldManager.getCustomFieldObjects(issue).findByName('Customer Request Type')
def requestTypeKey = issue.getCustomFieldValue(requestTypeCustomField)?.requestTypeKey

if (requestTypeKey) {
    def query = requestTypeService.newQueryBuilder().issue(issue.id).build()
    def requestType = requestTypeService.getRequestTypes(currentUser, query).results.find {
        it.key == requestTypeKey
    }

    log.debug requestType.name
}