skip rate limit coupons

[rajranjan0608]

This pull request introduces changes to the CouponService, rate limiter logic, and configuration files to enhance coupon functionality and streamline rate-limiting behavior. Key updates include adding new coupon properties, modifying rate limiter logic to consider coupon-based rate limit exemptions, and updating the configuration to support these changes.

CouponService Enhancements

• Added new optional properties skipIpRateLimit and skipWalletRateLimit to the Coupon type to enable skipping specific rate limits for certain coupons. (CouponService/couponService.ts, CouponService/couponService.tsL6-R15)
• Introduced a getCoupon method to retrieve coupon details by ID. (CouponService/couponService.ts, CouponService/couponService.tsR174-R177)

Rate Limiter Updates

• Updated the RateLimiter class to accept a CouponService instance and a type parameter (ip, wallet, or global). Added logic to skip rate limits based on the new coupon properties. (middlewares/rateLimiter.ts, [1] [2]
• Integrated CouponService into the rate limiter initialization in server.ts, enabling coupon-based rate limit exemptions for IP and wallet rate limiters. (server.ts, server.tsL48-L69)

Configuration Changes

• Increased the global rate limit MAX_LIMIT from 40 to 200 and reduced DRIP_AMOUNT from 2 to 0.01. (config.json, [1] [2]
• Removed several testnet configurations (e.g., WAGMI, NMAC, MASA, LT0, etc.) to simplify the configuration file. (config.json, [1] [2] [3] [4] [5]

Logging Enhancements

• Added logging of skippedIpRateLimit and skippedWalletRateLimit flags in the /sendToken endpoint for better observability. (server.ts, [1] [2]