[refactor] kakaopay kotlin & feign으로 리펙토링 #29

- KakaoPay 관련 kt 파일 패키지 변경
- payReady 기능을 kotlin & feign으로 제작

src/main/kotlin/org/washcode/washpang/domain/order/controller/OrderController.kt

@@ -2,9 +2,7 @@ package org.washcode.washpang.domain.order.controller
 
 import org.springframework.http.ResponseEntity
 import org.springframework.web.bind.annotation.*
-import org.washcode.washpang.domain.order.dto.OrderDto
 import org.washcode.washpang.domain.order.service.OrderService
-import org.washcode.washpang.global.domain.kakao.dto.KakaoDto
 import org.washcode.washpang.global.domain.kakaopay.client.KakaoPayClient
 import org.washcode.washpang.global.domain.kakaopay.dto.KakaoPayDto
 import org.washcode.washpang.global.exception.ResponseResult

src/main/kotlin/org/washcode/washpang/global/domain/kakaopay/client/KakaoPayClient.kt

@@ -35,7 +35,6 @@ class KakaoPayClient(
     @Value("\${kakaopay.key.secret-dev}")
     private val secretDev = ""
 
-    @Transactional
     fun payReady(userId: Int, dto: KakaoPayDto.ReqDto): ResponseResult {
         val reqDto = KakaoPayDto.ReadyReq(cid, clientSecret, dto.paymentId, userId.toString(), dto.name, dto.quantity, dto.totalPrice)
         var resBody: KakaoPayDto.ReadyRes? = null

src/main/kotlin/org/washcode/washpang/global/exception/ErrorCode.kt

@@ -40,5 +40,4 @@ enum class ErrorCode (
     KAKAOPAY_READY_ERROR(HttpStatus.INTERNAL_SERVER_ERROR, "카카오페이 결제 준비 에러"),
     KAKAOPAY_APPROVE_REDIS_ERROR(HttpStatus.INTERNAL_SERVER_ERROR, "TID가 REDIS 안에 없습니다."),
     KAKAOPAY_APPROVE_FEIGN_ERROR(HttpStatus.INTERNAL_SERVER_ERROR, "카카오페이 승인 API 통신 실패"),
-    KAKAOPAY_APPROVE_ERROR(HttpStatus.INTERNAL_SERVER_ERROR, "카카오페이 결제 승인 에러");
-}
+    KAKAOPAY_APPROVE_ERROR(HttpStatus.INTERNAL_SERVER_ERROR, "카카오페이 결제 승인 에러");