Function computeBackoffSeconds

computeBackoffSeconds(
    attempt: number,
    options?: RetryOptions,
    retryAfter?: number,
): number
Computes exponential backoff delay in seconds for a given attempt.
Parameters
- attempt: number
  1-based attempt index.
- options: RetryOptions = {}
  Retry configuration options.
- OptionalretryAfter: number
  Telegram flood control retry_after parameter if provided.
Returns number
Delay duration in seconds.