Function retryWithBackoff

src/services/api/filesApi.ts:97–123

* Executes an operation with exponential backoff retry logic * * @param operation - Operation name for logging * @param attemptFn - Function to execute on each attempt, returns RetryResult * @returns The successful result value * @throws Error if all retries exhausted

(
  operation: string,
  attemptFn: (attempt: number) => Promise<RetryResult<T>>,
)

 * @throws Error if all retries exhausted
 */
async function retryWithBackoff<T>(
  operation: string,
  attemptFn: (attempt: number) => Promise<RetryResult<T>>,
): Promise<T> {
  let lastError = ''

  for (let attempt = 1; attempt <= MAX_RETRIES; attempt++) {
    const result = await attemptFn(attempt)

    if (result.done) {
      return result.value
    }

    lastError = result.error || `${operation} failed`
    logDebug(
      `${operation} attempt ${attempt}/${MAX_RETRIES} failed: ${lastError}`,
    )

    if (attempt < MAX_RETRIES) {
      const delayMs = BASE_DELAY_MS * Math.pow(2, attempt - 1)
      logDebug(`Retrying ${operation} in ${delayMs}ms...`)
      await sleep(delayMs)
    }
  }

  throw new Error(`${lastError} after ${MAX_RETRIES} attempts`)
}

/**
 * Downloads a single file from the Anthropic Public Files API