Updates and payments additions

src/main/java/com/test/payment/controller/AirtelController.java

@@ -0,0 +1,40 @@
+package com.test.payment.controller;
+
+import com.test.payment.dto.AirtelCallbackPayload;
+import com.test.payment.dto.CallbackAckDto;
+import com.test.payment.dto.PaymentRequest;
+import com.test.payment.dto.PaymentResultDto;
+import com.test.payment.dto.TransactionStatusDto;
+import com.test.payment.service.AirtelService;
+import jakarta.validation.Valid;
+import lombok.RequiredArgsConstructor;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+import reactor.core.publisher.Mono;
+
+@RestController
+@RequestMapping("/api/airtel")
+@RequiredArgsConstructor
+public class AirtelController {
+
+    private final AirtelService airtelService;
+
+    @PostMapping("/pay")
+    public Mono<PaymentResultDto> pay(@Valid @RequestBody PaymentRequest request) {
+        return airtelService.initiatePayment(request);
+    }
+
+    @PostMapping("/callback")
+    public Mono<CallbackAckDto> callback(@RequestBody AirtelCallbackPayload payload) {
+        return airtelService.handleCallback(payload);
+    }
+
+    @GetMapping("/status/{transactionId}")
+    public Mono<TransactionStatusDto> status(@PathVariable String transactionId) {
+        return airtelService.checkStatus(transactionId);
+    }
+}