TooManyRequestsError has no reconnect hint

[xiaoshenxian]

I found you throw TooManyRequestsError for error code 429 which should contain a header named 'Retry-After' for retry waiting seconds. This can be retreived by the old mono API, but cannot be retreived by the new one since the TooManyRequestsError contains only a message.

[xiaoshenxian]

Maybe you can schedule a retry directly in binance_common.util.send_request when you received a 429.