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Common Issues and Solutions for API Integration with Fokawa
1. Timestamp Parameter Difference
Question: What is the maximum difference between the timestamp parameter of the request interface and the arrival time of the server?
Answer: The server will consider a request invalid if the timestamp in the request is sent more than 5000 milliseconds before the request's arrival. This time window can be customized by sending the optional parameter recvWindow.
2. X-CH-TS Cannot Be Empty
Question: The request header "X-CH-TS" cannot be empty. How to solve it?
Answer: It is recommended to print out the X-CH-TS and check whether it is empty when there is an exception. Optimize your code to check if the X-CH-TS is empty before each request.
3. Invalid Signatures
Question: Why does authentication always return invalid signatures? Answer:
Print out the request header information and the string before the signature.
Compare your request header with the example below:
Ensure the API-key is correctly configured.
Verify the string before signing conforms to the standard format, and the order of all elements is consistent:
4. ILLEGAL_CONTENT_TYPE (-1017)
Question: The calling interface prompts ILLEGAL_CONTENT_TYPE (-1017). What is the reason?
Answer: Attach Content-Type to all request headers and set it to application/json.
5. API Call Frequency Limits
Question: Is there a limit to the frequency of API calls per second? Answer: Yes, there are restrictions. Refer to the access frequency limits for each interface in the documentation.
Question: What is the limit on API access frequency? Answer: Personal data is restricted according to API-key, and public data is restricted according to IP. If the user requests public data and includes valid personal information, it is restricted according to API-key.
6. HTTP Status Code 429
Question: What is the cause of HTTP status code 429? Answer: The request interface exceeds the access frequency limit. Reduce the access frequency.
Question: Will the IP be blocked if the API call interface reports that the access frequency is exceeded? How long is it sealed? Answer: Normally not. Just reduce the access frequency.
7. WebSocket Disconnection
Question: Why is WebSocket disconnected? Answer: Without adding a heartbeat, the WebSocket connection requires the client to send a pong message to ensure stability. Network issues can also cause automatic disconnection. Implement a WebSocket disconnect and reconnect mechanism to automatically reconnect when the heartbeat connection is accidentally disconnected.
8. Time Out Error
Question: The user request interface reports an error Time Out? Answer: The network cannot connect to the server. Check whether the network is smooth.
9. Getting All Currency Pairs
Question: How to get all the currency pairs on the platform?
Answer: Use the /sapi/v1/symbols interface.
10. Batch Orders/Cancellations Limit
Question: Is there a limit on the number of batch orders/cancellations? Answer: Yes, the batch interface will limit 10 orders.
11. newClientOrderId
Question: What is newClientOrderId and what does it do?
Answer: newClientOrderId is your customized order number, which can be used to identify your order. Ensure this ID is unique. You can use newClientOrderId to call the "Order Information" interface to view the order status. If there is a repetition, you can only cancel or query the latest piece of data.
12. Latest Transaction Price
Question: How to get the latest transaction price?
Answer: You can get ticker information; last is the latest transaction price.
13. 24-Hour Trading Volume
Question: Will there be negative growth in the 24-hour trading volume in the ticker interface? Answer: Yes, the 24-hour trading volume is a 24-hour rolling data. Negative growth may occur when the accumulated trading volume in the next window is smaller than the previous window.
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