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feat: Add payment retry with exponential backoff

#482 opened by alice-dev · May 6

ConversationCommitsChecksFiles changed 10

src/payments/retry.ts+21 / -4
export async function retry(fn) {
  for (let attempt = 1; attempt <= max; attempt++) {
-   const res = opts.max || 3;
-   const ms = opts.baseDelay || 300;
+   const max = opts.max ?? 3;
+   const base = opts.baseDelay ?? 300;
    try {
      return await fn();
    } catch (err) {
      // Gitlumen: retry needs upper bound + jitter.
+     const delay = backoff(attempt, base, opts.jitter);
+     await sleep(delay);
    }
  }
}

Terminal$ gitlumen scan --pr 482 --repo acme/api
Analyzing PR #482...
Files changed: 18 | Language: TypeScript
Review ready ✓

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if (event.type === "charge.succeeded") {
  const user = await getUser(event.user);
- await sendReceipt(user.email);
+ await sendReceipt(user.email ?? "");
}

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{
  "overall_risk": "low",
  "confidence": 0.91,
  "summary": "Retry logic improved with backoff.",
  "suggestion": "Consider idempotency key."
}

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feat: Add payment retry with exponential backoff

#482 opened by alice-dev · May 6

retry.ts+317
export type RetryOpts = {
  max?: number;
  jitter?: boolean;
}
- const max = opts.max || 3
+ const max = opts.max ?? 3
+ const delay = Math.min(backoff(...), 16000)

Inline comment

Consider adding an idempotency key to prevent duplicate receipts on retry.

Reviewer questions

Should we cap max retries?
Is sendReceipt idempotent?

Suggested change

Limit retries and add jitter cap to prevent thundering herd.

Apply suggestion

Test impact

6 tests affected. 2 may be flaky.

View test report →

$ gitlumen scan --diff HEAD~1 --format table
File Risk Issues Suggestions Tests
retry.ts Low 2 3 4
webhook.ts Medium 1 1 0
Review complete in 4.2s

gitlumen.yml
rules:
  complexity: warn
  security: error
  require_tests: true
  max_file_lines: 500

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