Issue 2: Potential Rate Limiting Issues with 1inch API #2
Description
Body
The code relies heavily on the 1inch API for several routes (approve/spender, approve/allowance, approve/transaction, call/swap, quote, tokens). There's a single API key (process.env.AUTH_TOKEN) being used for all requests. If the application experiences high traffic, it could easily exceed the rate limits of the 1inch API, resulting in errors and service disruption. The error handling currently just throws an error, which might not be the best way to handle rate limiting.
Recommendation:
Implement rate limiting on the server-side to protect the 1inch API key. Consider using a caching mechanism for responses from the 1inch API to reduce the number of requests. Implement more sophisticated error handling, specifically checking for rate limiting errors from the 1inch API and responding gracefully to the client (e.g., with a 429 Too Many Requests status code and a Retry-After header). Implement retry logic with exponential backoff for failed API requests due to rate limiting.