Initial commit

src/main/java/com/test/payment/service/MpesaTokenService.java

@@ -0,0 +1,27 @@
+package com.test.payment.service;
+
+
+import lombok.RequiredArgsConstructor;
+import org.springframework.data.redis.core.RedisTemplate;
+import org.springframework.stereotype.Service;
+import reactor.core.publisher.Mono;
+
+import java.time.Duration;
+
+@Service
+@RequiredArgsConstructor
+public class MpesaTokenService {
+
+    private final RedisTemplate<String, String> redisTemplate;
+
+    public Mono<String> getToken() {
+        String cachedToken = redisTemplate.opsForValue().get("mpesa:token");
+        if (cachedToken != null) {
+            return Mono.just(cachedToken);
+        }
+        // Simulate token fetch from M-Pesa auth endpoint
+        String newToken = "access_token_" + System.currentTimeMillis();
+        redisTemplate.opsForValue().set("mpesa:token", newToken, Duration.ofMinutes(50));
+        return Mono.just(newToken);
+    }
+}