feat: 카카오페이로 포인트 충전하기

build.gradle

@@ -57,6 +57,17 @@ dependencies {
 
 	// reset password
 	implementation 'org.springframework.boot:spring-boot-starter-mail'
+
+	// kakao pay (test)
+	implementation 'com.github.iamport:iamport-rest-client-java:0.2.21'
+}
+
+repositories {
+	allprojects {
+		repositories {
+			maven { url 'https://jitpack.io' }
+		}
+	}
 }
 
 tasks.named('test') {

src/main/java/com/soongsil/poppin/user/application/PaymentService.java

@@ -0,0 +1,54 @@
+package com.soongsil.poppin.user.application;
+
+import com.siot.IamportRestClient.IamportClient;
+import com.siot.IamportRestClient.exception.IamportResponseException;
+import com.siot.IamportRestClient.response.IamportResponse;
+import com.siot.IamportRestClient.response.Payment;
+import com.soongsil.poppin.global.response.ErrorCode;
+import com.soongsil.poppin.user.application.exception.UserException;
+import com.soongsil.poppin.user.application.response.PaymentDto;
+import com.soongsil.poppin.user.domain.Member;
+import com.soongsil.poppin.user.domain.UserRepository;
+import lombok.extern.log4j.Log4j2;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+import java.io.IOException;
+
+@Service
+@Transactional
+@Log4j2
+public class PaymentService {
+    private final IamportClient iamportClient;
+    private final UserRepository userRepository;
+
+    public PaymentService(UserRepository userRepository) {
+        this.userRepository = userRepository;
+        this.iamportClient = new IamportClient("8754401450070487", "oU0hOQPSSuFLK6qSfLZZRrprvF3pqz3K0OOniDSvrS58RfR6sPFZnhXhVt7Av9AVPtPqItaiuL43BLR1");
+    }
+
+    public PaymentDto verifyPayment(String imp_uid) throws IamportResponseException, IOException {
+        IamportResponse<Payment> iamportResponse = iamportClient.paymentByImpUid(imp_uid); // 결제 검증 시작
+        Long amount = (iamportResponse.getResponse().getAmount()).longValue(); // 결제 금액
+        String nickname = iamportResponse.getResponse().getBuyerName(); // 유저 닉네임
+        String status = iamportResponse.getResponse().getStatus(); // Paid 이면 1
+
+        Member result = userRepository.findBynickName(nickname);
+        if (result == null) {
+            throw new UserException(ErrorCode.USER_NOT_FOUND);
+        }
+
+        Long newPoint = result.getPoint() + amount;
+        result.setPoint(newPoint);
+
+        userRepository.save(result);
+
+        PaymentDto paymentDto = PaymentDto.builder()
+                .impuid(imp_uid)
+                .amount(newPoint)
+                .nickname(nickname)
+                .status(amount + "포인트가 충전되었습니다.")
+                .build();
+
+        return paymentDto;
+    }
+}

src/main/java/com/soongsil/poppin/user/application/response/PaymentDto.java

@@ -0,0 +1,17 @@
+package com.soongsil.poppin.user.application.response;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Getter;
+import lombok.Setter;
+
+@AllArgsConstructor
+@Getter
+@Setter
+@Builder
+public class PaymentDto {
+    private String impuid; // 거래 고유 번호
+    private String nickname; // 사용자 닉네임
+    private String status; // 결제 여부 paid = 1, 그 외 실패
+    private Long amount; // 결제 금액
+}

src/main/java/com/soongsil/poppin/user/presentation/MypageController.java

@@ -1,11 +1,10 @@
 package com.soongsil.poppin.user.presentation;
 
+import com.siot.IamportRestClient.exception.IamportResponseException;
 import com.soongsil.poppin.global.response.ResponseDto;
 import com.soongsil.poppin.user.application.MemberService;
-import com.soongsil.poppin.user.application.response.ChargePointDto;
-import com.soongsil.poppin.user.application.response.JWTUtil;
-import com.soongsil.poppin.user.application.response.MypageDto;
-import com.soongsil.poppin.user.application.response.UserDto;
+import com.soongsil.poppin.user.application.PaymentService;
+import com.soongsil.poppin.user.application.response.*;
 import com.soongsil.poppin.user.domain.Member;
 import com.soongsil.poppin.userchat.application.response.JoinUserChat;
 import lombok.RequiredArgsConstructor;
@@ -14,13 +13,15 @@
 import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.*;
 
+import java.io.IOException;
 import java.util.Map;
 
 @RestController
 @RequiredArgsConstructor
 @Log4j2
 public class MypageController {
     private final MemberService memberService;
+    private final PaymentService paymentService;
 
     @GetMapping("/v1/user/kakao")
     public Map<String, Object> getMemberFromKakao(String accessToken) {
@@ -53,6 +54,13 @@ public ResponseEntity<Long> chargePoint(@RequestBody ChargePointDto chargePointD
         return ResponseEntity.ok(newPoint);
     }
 
+    @ResponseBody
+    @RequestMapping("/v1/verify/{imp_uid}")
+    public PaymentDto paymentByImpUid(@PathVariable("imp_uid") String imp_uid)
+            throws IamportResponseException, IOException {
+        return paymentService.verifyPayment(imp_uid); // 결제 및 검증 DB 값 삽입
+    }
+
     @PostMapping("/v1/user/modify-password")
     public ResponseEntity<String> modifyPassword(@RequestBody String userId) {
         try {