Wildberries API TypeScript SDK / <internal> / RetryHandler

Class: RetryHandler

Defined in: client/retry-handler.ts:150

RetryHandler - Automatic retry with exponential backoff

Provides resilience against transient failures by automatically retrying failed operations with configurable delays and backoff strategies.

Retry Policy:

• ✅ Retries: 5xx errors, 429 rate limits, network timeouts, connection failures
• ❌ NO Retry: 401/403 auth errors, 400/422 validation errors, other 4xx errors

Exponential Backoff:

• Formula: delay = retryDelay * 2^attempt * jitter
• Jitter: Random ±10% to prevent thundering herd
• Max delay: Capped at 30 seconds

Example

const handler = new RetryHandler({
  maxRetries: 3,
  retryDelay: 1000,
  exponentialBackoff: true
});

const result = await handler.executeWithRetry(
  async () => await fetchData(),
  'fetchData'
);

Constructors

Constructor

new RetryHandler(config?: RetryConfig): RetryHandler;

Defined in: client/retry-handler.ts:171

Creates a new RetryHandler instance

Parameters

Parameter	Type	Description
config?	RetryConfig	Optional retry configuration (uses defaults if not provided)

Returns

RetryHandler

Example

// Use defaults (3 retries, 1s delay, exponential backoff)
const handler = new RetryHandler();

// Custom configuration
const handler = new RetryHandler({
  maxRetries: 5,
  retryDelay: 500,
  exponentialBackoff: true
});

Methods

executeWithRetry()

executeWithRetry<T>(operation: () => Promise<T>, operationName: string): Promise<T>;

Defined in: client/retry-handler.ts:212

Executes an async operation with automatic retry on transient failures

Wraps the provided operation and automatically retries on failures that are likely to be transient (network errors, server errors, rate limits).

Retry Behavior:

• Retries on: NetworkError (5xx, timeout, no status), RateLimitError (429)
• NO retry on: AuthenticationError, ValidationError, other 4xx errors
• Uses exponential backoff with jitter (if configured)
• Preserves and re-throws final error after max retries exhausted

Type Parameters

Type Parameter	Description
T	The return type of the operation

Parameters

Parameter	Type	Default value	Description
operation	() => Promise<T>	undefined	Async function to execute (and retry on failure)
operationName	string	'operation'	Description of operation for logging (optional)

Returns

Promise<T>

The result of the successful operation

Throws

The final error if all retry attempts are exhausted

Example

// Basic usage
const data = await handler.executeWithRetry(
  async () => await api.getData(),
  'getData'
);

// With arrow function
const result = await handler.executeWithRetry(
  () => fetch('https://api.example.com/data').then(r => r.json()),
  'fetch data'
);